Re: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble


May 13, 2011

 


----------------------------

#54752 May 13, 2011

Gents,



Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

supposed to have three days of ideal skies starting this evening.



Although it is (quite) heavy, I managed to load the RHA with saddle

plate and rings myself. A few more such efforts and I will start to talk

like Arnold.



Anthony.



----------------------------

#54754 May 13, 2011

--- In ap-ug@yahoogroups.com, Anthony Ayiomamitis anthony@...> wrote: >

> Gents,

>

> Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

> supposed to have three days of ideal skies starting this evening.

>

> Although it is (quite) heavy, I managed to load the RHA with saddle

> plate and rings myself. A few more such efforts and I will start to talk

> like Arnold.

>

> Anthony.

>

- Which one - governor or Terminator?

Yuri



----------------------------

#54756 May 13, 2011

Stuart,



I have a difficult exoplanet transit this evening with HAT-P-18b in

Hercules and, to this end, it get priority for tonight. If I skip it,

there will be another opportunity in eleven days' time but that is

really throwing the dice with the weather and, equally important, the

moon will not be an issue then and as such it should be dedicated to DSO

work. Tonight, with that piece of rock doing its dirty work, it is

another incentive to pursue the exoplanet transit.



Tomorrow's menu has .... Jacoby 1 in Boo ....



Anthony.



O/H Stuart Heggie ......: >

>

> Congrats Anthony! Can't wait to see the images pounding out!

>

> Stuart

>

> > To: ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>;

> ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

> > From: anthony@... mailto:anthony%40perseus.gr>

> > Date: Fri, 13 May 2011 18:38:53 +0300

> > Subject: [ap-ug] AP 305 RHA .... ready to rumble

> >

> > Gents,

> >

> > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

> > supposed to have three days of ideal skies starting this evening.

> >

> > Although it is (quite) heavy, I managed to load the RHA with saddle

> > plate and rings myself. A few more such efforts and I will start to

> talk

> > like Arnold.

> >

> > Anthony.

> >

> >

---------------

> >

> >

> >

>



----------------------------

#54757 May 13, 2011

O/H Yuri ......: >

>

>

> --- In ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>, Anthony

> Ayiomamitis anthony@...> wrote:

> >

> > Gents,

> >

> > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

> > supposed to have three days of ideal skies starting this evening.

> >

> > Although it is (quite) heavy, I managed to load the RHA with saddle

> > plate and rings myself. A few more such efforts and I will start to

> talk

> > like Arnold.

> >

> > Anthony.

> >

> - Which one - governor or Terminator?

>

Hehehehehe, the guy with the famous "I will be bauck ....". :-)



Anthony. >

> Yuri

>



----------------------------

#54758 May 13, 2011

Stuart,



I have about 90 minutes I can waste before starting my one hour of

preingress data for the exoplanet. I will set the RHA loose for some

test shots of Jacoby 1 - both Ha and OIII - so as to have an indication

how to proceed tomorrow when I actually sit down to pursue it.



I also have to get my twilight flats in about an hour.



Anthony.



O/H Anthony Ayiomamitis ......: > Stuart,

>

> I have a difficult exoplanet transit this evening with HAT-P-18b in

> Hercules and, to this end, it get priority for tonight. If I skip it,

> there will be another opportunity in eleven days' time but that is

> really throwing the dice with the weather and, equally important, the

> moon will not be an issue then and as such it should be dedicated to

> DSO work. Tonight, with that piece of rock doing its dirty work, it is

> another incentive to pursue the exoplanet transit.

>

> Tomorrow's menu has .... Jacoby 1 in Boo ....

>

> Anthony.

>

> O/H Stuart Heggie ......:

>>

>>

>> Congrats Anthony! Can't wait to see the images pounding out!

>>

>> Stuart

>>

>> > To: ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>;

>> ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

>> > From: anthony@... mailto:anthony%40perseus.gr>

>> > Date: Fri, 13 May 2011 18:38:53 +0300

>> > Subject: [ap-ug] AP 305 RHA .... ready to rumble

>> >

>> > Gents,

>> >

>> > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

>> > supposed to have three days of ideal skies starting this evening.

>> >

>> > Although it is (quite) heavy, I managed to load the RHA with saddle

>> > plate and rings myself. A few more such efforts and I will start to

>> talk

>> > like Arnold.

>> >

>> > Anthony.

>> >

>> >

---------------

>> >

>> >

>> >

>>

>

>







----------------------------

#54759 May 13, 2011

Hi Anthony,



why you don't set up first the saddle with half of the ring. Then the RHA and the the top half of the ring?

i did it this way and it works fine!



Konstantin



Konstantin v. Poschinger



Hammerichstr. 5

22605 Hamburg

040/8805747

0171 1983476



Am 13.05.2011 um 17:38 schrieb Anthony Ayiomamitis:

> Gents,

>

> Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

> supposed to have three days of ideal skies starting this evening.

>

> Although it is (quite) heavy, I managed to load the RHA with saddle

> plate and rings myself. A few more such efforts and I will start to talk

> like Arnold.

>

> Anthony.

>

>

---------------

>

>

> To UNSUBSCRIBE, or for general information on the ap-ug list

> see groups.yahoo.com/group/ap-ugYahoo! Groups Links

>

>

>



----------------------------

#54760 May 13, 2011

Konstantin,



The problem is that I have the 54" AP pier which places the saddle plate

already high and above my head (I am 5' 11") .... I just reverted to

what I used to do with my Celestron C14 SCT and where the OTA with

dovetail goes onto the saddle plate and then I gently place the dovetail

within the saddle plate.



To be honest, my number one concern was the ability (or not) to load the

RHA onto my AP1200 given the height of the pier. I am now very relieved

that it is doable provided I have completely secured the RHA with rings

and dovetail first.



I am also happy to see very good balance with my 3x18 and 1x10 lb

counterweights. That is all I needed now for yet another delay ... a

lack of sufficient counterweights.



Anthony.



O/H Konstantin v. Poschinger ......: >

> Hi Anthony,

>

> why you don't set up first the saddle with half of the ring. Then the

> RHA and the the top half of the ring?

> i did it this way and it works fine!

>

> Konstantin

>

> Konstantin v. Poschinger

>

> Hammerichstr. 5

> 22605 Hamburg

> 040/8805747

> 0171 1983476

>

> Am 13.05.2011 um 17:38 schrieb Anthony Ayiomamitis:

>

> > Gents,

> >

> > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

> > supposed to have three days of ideal skies starting this evening.

> >

> > Although it is (quite) heavy, I managed to load the RHA with saddle

> > plate and rings myself. A few more such efforts and I will start to

> talk

> > like Arnold.

> >

> > Anthony.

> >

> >

---------------

> >

>

>

>



----------------------------

#54762 May 13, 2011

Anthony,



Our former "Governator" is looking for a new gig...and he just lowered his

expenses by dumping some excess baggage (i.e., Maria). Maybe a trip to

sunny Greece as your imaging "assistant" is just what the doctor ordered...

plus he could teach you a few more moves to "Pump, You up!"...



Make him an offer he can't refuse...



Here's hoping for clear skies and lots of RHA images from you!



Best Wishes,



Hank

On Fri, May 13, 2011 at 8:58 AM, Anthony Ayiomamitis anthony@...>wrote:



>

>

> O/H Yuri ......:

> >

> >

> >

> > --- In ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>, Anthony

> > Ayiomamitis anthony@...> wrote:

> > >

> > > Gents,

> > >

> > > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

> > > supposed to have three days of ideal skies starting this evening.

> > >

> > > Although it is (quite) heavy, I managed to load the RHA with saddle

> > > plate and rings myself. A few more such efforts and I will start to

> > talk

> > > like Arnold.

> > >

> > > Anthony.

> > >

> > - Which one - governor or Terminator?

> >

> Hehehehehe, the guy with the famous "I will be bauck ....". :-)

>

> Anthony.

> >

> > Yuri

> >

>

>

>





[Non-text portions of this message have been removed]



----------------------------

#54763 May 13, 2011

Salut Anthony,



I now know why it's cloudy, thank you ;-))



Gilles











Gilles COHEN

www.ovision.com/Gilles_Home.html













-----E-mail d'origine-----

De : Hank Sielski hsielski@...>

A : ap-ug@yahoogroups.com

Envoy. le : Vendredi, 13 Mai 2011 19:07

Sujet : Re: [ap-ug] Re: AP 305 RHA .... ready to rumble





Anthony,



Our former "Governator" is looking for a new gig...and he just lowered his

expenses by dumping some excess baggage (i.e., Maria). Maybe a trip to

sunny Greece as your imaging "assistant" is just what the doctor ordered...

plus he could teach you a few more moves to "Pump, You up!"...



Make him an offer he can't refuse...



Here's hoping for clear skies and lots of RHA images from you!



Best Wishes,



Hank

On Fri, May 13, 2011 at 8:58 AM, Anthony Ayiomamitis anthony@...>wrote:



>

>

> O/H Yuri ......:

> >

> >

> >

> > --- In ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>, Anthony

> > Ayiomamitis anthony@...> wrote:

> > >

> > > Gents,

> > >

> > > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

> > > supposed to have three days of ideal skies starting this evening.

> > >

> > > Although it is (quite) heavy, I managed to load the RHA with saddle

> > > plate and rings myself. A few more such efforts and I will start to

> > talk

> > > like Arnold.

> > >

> > > Anthony.

> > >

> > - Which one - governor or Terminator?

> >

> Hehehehehe, the guy with the famous "I will be bauck ....". :-)

>

> Anthony.

> >

> > Yuri

> >

>

>

>





[Non-text portions of this message have been removed]







---------------





To UNSUBSCRIBE, or for general information on the ap-ug list

see groups.yahoo.com/group/ap-ugYahoo! Groups Links













[Non-text portions of this message have been removed]







----------------------------

#54767 May 13, 2011

Sorry Gilles but this thing has been caged up for six months (Dec-May)

... you had your chance(s). :-)



Anthony.



O/H Gilles COHEN ......: >

>

> Salut Anthony,

>

> I now know why it's cloudy, thank you ;-))

>

> Gilles

>

> Gilles COHEN

> www.ovision.com/Gilles_Home.html

>

> -----E-mail d'origine-----

> De : Hank Sielski hsielski@... mailto:hsielski%40gmail.com>>

> A : ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>

> Envoy. le : Vendredi, 13 Mai 2011 19:07

> Sujet : Re: [ap-ug] Re: AP 305 RHA .... ready to rumble

>

> Anthony,

>

> Our former "Governator" is looking for a new gig...and he just lowered his

> expenses by dumping some excess baggage (i.e., Maria). Maybe a trip to

> sunny Greece as your imaging "assistant" is just what the doctor

> ordered...

> plus he could teach you a few more moves to "Pump, You up!"...

>

> Make him an offer he can't refuse...

>

> Here's hoping for clear skies and lots of RHA images from you!

>

> Best Wishes,

>

> Hank

>

> On Fri, May 13, 2011 at 8:58 AM, Anthony Ayiomamitis

> anthony@... mailto:anthony%40perseus.gr>>wrote:

>

> >

> >

> > O/H Yuri ......:

> > >

> > >

> > >

> > > --- In ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>

> mailto:ap-ug%40yahoogroups.com>, Anthony

> > > Ayiomamitis anthony@...> wrote:

> > > >

> > > > Gents,

> > > >

> > > > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

> > > > supposed to have three days of ideal skies starting this evening.

> > > >

> > > > Although it is (quite) heavy, I managed to load the RHA with saddle

> > > > plate and rings myself. A few more such efforts and I will start to

> > > talk

> > > > like Arnold.

> > > >

> > > > Anthony.

> > > >

> > > - Which one - governor or Terminator?

> > >

> > Hehehehehe, the guy with the famous "I will be bauck ....". :-)

> >

> > Anthony.

> > >

> > > Yuri

> > >

> >

> >

>



----------------------------

#54768 May 13, 2011

Hi Jim,



I honestly wish you were here so that we could appreciate this baby in

action during the all-nighter.



Here are some photos which I think Jeffrey asked about and which I will

have to reshoot under better lighting:



(1) www.perseus.gr/EquipPage/equip-ota-rha-01.jpg

(2) www.perseus.gr/EquipPage/equip-ota-rha-02.jpg

(3) www.perseus.gr/EquipPage/equip-ota-rha-03.jpg



Anthony.



O/H Jim Janusz ......: >

>

> We are all patiently waiting......

>

> Jim

>

> ----- Original Message -----

> From: "Anthony Ayiomamitis" anthony@...

> mailto:anthony%40perseus.gr>>

> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>>

> Sent: Friday, May 13, 2011 10:48 AM

> Subject: Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

>

> > Hi Harold,

> >

> > I received the beast in early December and, regrettably, it remained

> > caged up until now due to the weather. I took it out of the box upon

> > arrival ... drooled all over it for a good hour .... and back in the box

> > it went for what seems like eternity.

> >

> > I could have used it a few on the odd occasion the past two to three

> > weeks but the humidity was prohibitive (up to 98% on some nights at 3

> > AM). With twelve inches of aperture, this thing is effectively a magnet

> > for dew.

> >

> > My three days starting this evening involve much better humidity and it

> > is now safe to get the beast out for first light.

> >

> > Anthony.

> >

> > O/H Harold ......:

> >>

> >> Anthony,

> >>

> >> Do they have different laws of physics in Greece? In the US setting up

> >> such an expensive and high quality system results in at last three

> >> days of rain.

> >>

> >> Good luck,

> >> Harold

> >>

> >> --- In ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

> mailto:ap-gto%40yahoogroups.com>,

> >> Anthony Ayiomamitis anthony@...> wrote:

> >> >

> >> > Gents,

> >> >

> >> > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

> >> > supposed to have three days of ideal skies starting this evening.

> >> >

> >> > Although it is (quite) heavy, I managed to load the RHA with saddle

> >> > plate and rings myself. A few more such efforts and I will start to

> >> talk

> >> > like Arnold.

> >> >

> >> > Anthony.

> >> >

> >>

> >

> >

> >

> >

>



----------------------------

#54769 May 13, 2011

That's a beauty setup Anthony. Can't wait for the first images.



Chris







----- Original Message -----

From: "Anthony Ayiomamitis" anthony@...>

To: ap-gto@yahoogroups.com>; ap-ug@yahoogroups.com>

Sent: Friday, May 13, 2011 2:36 PM

Subject: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble





> Hi Jim,

>

> I honestly wish you were here so that we could appreciate this baby in

> action during the all-nighter.

>

> Here are some photos which I think Jeffrey asked about and which I will

> have to reshoot under better lighting:

>

> (1) www.perseus.gr/EquipPage/equip-ota-rha-01.jpg

> (2) www.perseus.gr/EquipPage/equip-ota-rha-02.jpg

> (3) www.perseus.gr/EquipPage/equip-ota-rha-03.jpg

>

> Anthony.

>

> O/H Jim Janusz ......:

>>

>>

>> We are all patiently waiting......

>>

>> Jim

>>

>> ----- Original Message -----

>> From: "Anthony Ayiomamitis" anthony@...

>> mailto:anthony%40perseus.gr>>

>> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>>

>> Sent: Friday, May 13, 2011 10:48 AM

>> Subject: Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

>>

>> > Hi Harold,

>> >

>> > I received the beast in early December and, regrettably, it remained

>> > caged up until now due to the weather. I took it out of the box upon

>> > arrival ... drooled all over it for a good hour .... and back in the

>> > box

>> > it went for what seems like eternity.

>> >

>> > I could have used it a few on the odd occasion the past two to three

>> > weeks but the humidity was prohibitive (up to 98% on some nights at 3

>> > AM). With twelve inches of aperture, this thing is effectively a magnet

>> > for dew.

>> >

>> > My three days starting this evening involve much better humidity and it

>> > is now safe to get the beast out for first light.

>> >

>> > Anthony.

>> >

>> > O/H Harold ......:

>> >>

>> >> Anthony,

>> >>

>> >> Do they have different laws of physics in Greece? In the US setting up

>> >> such an expensive and high quality system results in at last three

>> >> days of rain.

>> >>

>> >> Good luck,

>> >> Harold

>> >>

>> >> --- In ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

>> mailto:ap-gto%40yahoogroups.com>,

>> >> Anthony Ayiomamitis anthony@...> wrote:

>> >> >

>> >> > Gents,

>> >> >

>> >> > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

>> >> > supposed to have three days of ideal skies starting this evening.

>> >> >

>> >> > Although it is (quite) heavy, I managed to load the RHA with saddle

>> >> > plate and rings myself. A few more such efforts and I will start to

>> >> talk

>> >> > like Arnold.

>> >> >

>> >> > Anthony.

>> >> >

>> >>

>> >

>> >

>> >

>> >

>>

>







----------------------------

#54771 May 13, 2011

Beautiful! Can't wait for some images. Continued clear skies, Anthony.



Jim

----- Original Message -----

From: "Anthony Ayiomamitis" anthony@...>

To: ap-gto@yahoogroups.com>; ap-ug@yahoogroups.com>

Sent: Friday, May 13, 2011 11:36 AM

Subject: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble





> Hi Jim,

>

> I honestly wish you were here so that we could appreciate this baby in

> action during the all-nighter.

>

> Here are some photos which I think Jeffrey asked about and which I will

> have to reshoot under better lighting:

>

> (1) www.perseus.gr/EquipPage/equip-ota-rha-01.jpg

> (2) www.perseus.gr/EquipPage/equip-ota-rha-02.jpg

> (3) www.perseus.gr/EquipPage/equip-ota-rha-03.jpg

>

> Anthony.

>

> O/H Jim Janusz ......:

>>

>>

>> We are all patiently waiting......

>>

>> Jim

>>

>> ----- Original Message -----

>> From: "Anthony Ayiomamitis" anthony@...

>> mailto:anthony%40perseus.gr>>

>> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>>

>> Sent: Friday, May 13, 2011 10:48 AM

>> Subject: Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

>>

>> > Hi Harold,

>> >

>> > I received the beast in early December and, regrettably, it remained

>> > caged up until now due to the weather. I took it out of the box upon

>> > arrival ... drooled all over it for a good hour .... and back in the

>> > box

>> > it went for what seems like eternity.

>> >

>> > I could have used it a few on the odd occasion the past two to three

>> > weeks but the humidity was prohibitive (up to 98% on some nights at 3

>> > AM). With twelve inches of aperture, this thing is effectively a magnet

>> > for dew.

>> >

>> > My three days starting this evening involve much better humidity and it

>> > is now safe to get the beast out for first light.

>> >

>> > Anthony.

>> >

>> > O/H Harold ......:

>> >>

>> >> Anthony,

>> >>

>> >> Do they have different laws of physics in Greece? In the US setting up

>> >> such an expensive and high quality system results in at last three

>> >> days of rain.

>> >>

>> >> Good luck,

>> >> Harold

>> >>

>> >> --- In ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

>> mailto:ap-gto%40yahoogroups.com>,

>> >> Anthony Ayiomamitis anthony@...> wrote:

>> >> >

>> >> > Gents,

>> >> >

>> >> > Just loaded the RHA onto the AP1200 and I am ready to rumble. We are

>> >> > supposed to have three days of ideal skies starting this evening.

>> >> >

>> >> > Although it is (quite) heavy, I managed to load the RHA with saddle

>> >> > plate and rings myself. A few more such efforts and I will start to

>> >> talk

>> >> > like Arnold.

>> >> >

>> >> > Anthony.

>> >> >

>> >>

>> >

>> >

>> >

>> >

>>

>

>

---------------

>

>

> To UNSUBSCRIBE, or for general information on the ap-ug list

> see groups.yahoo.com/group/ap-ugYahoo! Groups Links

>

>

>

>



----------------------------

#54777 May 13, 2011

Hi Chris,



It looks even better in person. Really!



Now, some first thoughts ....



(1) once darkness approached, I pursued my usual one-star alignment ...

and there was a small problem since I usually use the knobs on the

clamps for the rings of my AP160 to get the initial star on the chip.

This is not the case with the RHA since the OTA and the rings are one

homogenous package. Since the rings are octagonal, I used one of the

corners - front and back rings - as a means to center visually Vega for

my one-star alignment. It worked perfectly since it was on the ST-10XME

chip without the slightest problem. I will investigate when things cool

down a bit (psychologically) how best to approach this thing, for I have

a the AP base and quick release bracket on my AP160 and the RHA is

begging for the same



(2) focusing ... BAD and GOOD ... my back-end is comprised of an SBIG

AO-8, SBIG CFW10 and ST-10XME but this bundle will not come to focus on

the RHA and this is something I have also experienced with my Tak FSQ

(the AP160 works just fine with this bundle). A mad rush to remove the

AO-8 unit and find/insert the original 2" nosepiece while the camera was

running during this time so as not to lose the gradual cooling. This was

the BAD.



For the GOOD ... holy cow, this baby snaps VERY easily into perfect

focus and I do not care if it is f3.8. Too bad I picked up a MicroTouch

motor last week, for it will not be needed!



(3) Rolando should respectfully rename the RHA to "Vacuum Cleaner". Man

does this thing suck in photons. My exoplanet host star for this evening

is mag 12.759 and the RHA while slightly defocused (on purpose for such

work so as to increase the S/N) is saturating the pixels with one-min

subs! I went from 2x2 binning (typical binning mode so as to increase

the S/N) back down to 1x1 binning and I am still getting a flux of

400,000 ADU and an SNR of 300+ (as per Maxim/DL). All of this for a

pretty dim exoplanet host star at mag 12.759.



More later as I am about to start the exoplanet photometry in less than

10 minutes.



Anthony.





O/H Chris Cook ......: >

>

> That's a beauty setup Anthony. Can't wait for the first images.

>

> Chris

>

> ----- Original Message -----

> From: "Anthony Ayiomamitis" anthony@...

> mailto:anthony%40perseus.gr>>

> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>>;

> ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>>

> Sent: Friday, May 13, 2011 2:36 PM

> Subject: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

>

> > Hi Jim,

> >

> > I honestly wish you were here so that we could appreciate this baby in

> > action during the all-nighter.

> >

> > Here are some photos which I think Jeffrey asked about and which I will

> > have to reshoot under better lighting:

> >

> > (1) www.perseus.gr/EquipPage/equip-ota-rha-01.jpg

> > (2) www.perseus.gr/EquipPage/equip-ota-rha-02.jpg

> > (3) www.perseus.gr/EquipPage/equip-ota-rha-03.jpg

> >

> > Anthony.

> >

> > O/H Jim Janusz ......:

> >>

> >>

> >> We are all patiently waiting......

> >>

> >> Jim

> >>

> >> ----- Original Message -----

> >> From: "Anthony Ayiomamitis" anthony@...

> mailto:anthony%40perseus.gr>

> >> mailto:anthony%40perseus.gr>>

> >> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

> mailto:ap-gto%40yahoogroups.com>>

> >> Sent: Friday, May 13, 2011 10:48 AM

> >> Subject: Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

> >>

> >> > Hi Harold,

> >> >

> >> > I received the beast in early December and, regrettably, it remained

> >> > caged up until now due to the weather. I took it out of the box upon

> >> > arrival ... drooled all over it for a good hour .... and back in the

> >> > box

> >> > it went for what seems like eternity.

> >> >

> >> > I could have used it a few on the odd occasion the past two to three

> >> > weeks but the humidity was prohibitive (up to 98% on some nights at 3

> >> > AM). With twelve inches of aperture, this thing is effectively a

> magnet

> >> > for dew.

> >> >

> >> > My three days starting this evening involve much better humidity

> and it

> >> > is now safe to get the beast out for first light.

> >> >

> >> > Anthony.

> >> >

> >> > O/H Harold ......:

> >> >>

> >> >> Anthony,

> >> >>

> >> >> Do they have different laws of physics in Greece? In the US

> setting up

> >> >> such an expensive and high quality system results in at last three

> >> >> days of rain.

> >> >>

> >> >> Good luck,

> >> >> Harold

> >> >>

> >> >> --- In ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

> mailto:ap-gto%40yahoogroups.com>

> >> mailto:ap-gto%40yahoogroups.com>,

> >> >> Anthony Ayiomamitis anthony@...> wrote:

> >> >> >

> >> >> > Gents,

> >> >> >

> >> >> > Just loaded the RHA onto the AP1200 and I am ready to rumble.

> We are

> >> >> > supposed to have three days of ideal skies starting this evening.

> >> >> >

> >> >> > Although it is (quite) heavy, I managed to load the RHA with

> saddle

> >> >> > plate and rings myself. A few more such efforts and I will

> start to

> >> >> talk

> >> >> > like Arnold.

> >> >> >

> >> >> > Anthony.

> >> >> >

> >> >>

> >> >

> >> >

> >> >

>







----------------------------

#54778 May 13, 2011

O/H Anthony Ayiomamitis ......: > Hi Chris,

>

> It looks even better in person. Really!

>

> Now, some first thoughts ....

>

> (1) once darkness approached, I pursued my usual one-star alignment

> ... and there was a small problem since I usually use the knobs on the

> clamps for the rings of my AP160 to get the initial star on the chip.

> This is not the case with the RHA since the OTA and the rings are one

> homogenous package. Since the rings are octagonal, I used one of the

> corners - front and back rings - as a means to center visually Vega

> for my one-star alignment. It worked perfectly since it was on the

> ST-10XME chip without the slightest problem. I will investigate when

> things cool down a bit (psychologically) how best to approach this

> thing, for I have a the AP base and quick release bracket on my AP160

> and the RHA is begging for the same

>

> (2) focusing ... BAD and GOOD ... my back-end is comprised of an SBIG

> AO-8, SBIG CFW10 and ST-10XME but this bundle will not come to focus

> on the RHA and this is something I have also experienced with my Tak

> FSQ (the AP160 works just fine with this bundle). A mad rush to remove

> the AO-8 unit and find/insert the original 2" nosepiece while the

> camera was running during this time so as not to lose the gradual

> cooling. This was the BAD.

>

> For the GOOD ... holy cow, this baby snaps VERY easily into perfect

> focus and I do not care if it is f3.8. Too bad I picked up a

> MicroTouch motor last week, for it will not be needed!

>

> (3) Rolando should respectfully rename the RHA to "Vacuum Cleaner".

> Man does this thing suck in photons. My exoplanet host star for this

> evening is mag 12.759 and the RHA while slightly defocused (on purpose

> for such work so as to increase the S/N) is saturating the pixels with

> one-min subs! I went from 2x2 binning (typical binning mode so as to

> increase the S/N) back down to 1x1 binning and I am still getting a

> flux of 400,000 ADU and an SNR of 300+ (as per Maxim/DL). All of this

> for a pretty dim exoplanet host star at mag 12.759.

(4) vignetting ... there is an indication that some minor vignetting is

taking place at the edges and which reinforces the use of flats when

doing any sort of imaging



(5) ignoring the fact the AP allows one to proceed with a premature

meridian flip, my AP160 can go two hours past the meridian before camera

and pier will come into contact. It is quite obvious that the RHA and

the shorter tube will allow much more than two hours and this is a

pleasant result since there is a small part of the sky where a premature

flip is not possible when the target of interest is around 45 degrees or so



(6) guiding ... considering the fact that the RHA really sucks in those

photons, guiding is now easier and which also means even dimmer stars

can now be used as well. I will check on the magnitude of the guide star

I am using right now and which is providing a max pixel value of 16,000+

ADU with four-second subs (binned 2x2). I would not be surprised if it

is mag 12+ !



Anthony. >

> More later as I am about to start the exoplanet photometry in less

> than 10 minutes.

>

> Anthony.

>

>

> O/H Chris Cook ......:

>>

>>

>> That's a beauty setup Anthony. Can't wait for the first images.

>>

>> Chris

>>

>> ----- Original Message -----

>> From: "Anthony Ayiomamitis" anthony@...

>> mailto:anthony%40perseus.gr>>

>> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>>;

>> ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>>

>> Sent: Friday, May 13, 2011 2:36 PM

>> Subject: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

>>

>> > Hi Jim,

>> >

>> > I honestly wish you were here so that we could appreciate this baby in

>> > action during the all-nighter.

>> >

>> > Here are some photos which I think Jeffrey asked about and which I

>> will

>> > have to reshoot under better lighting:

>> >

>> > (1) www.perseus.gr/EquipPage/equip-ota-rha-01.jpg

>> > (2) www.perseus.gr/EquipPage/equip-ota-rha-02.jpg

>> > (3) www.perseus.gr/EquipPage/equip-ota-rha-03.jpg

>> >

>> > Anthony.

>> >

>> > O/H Jim Janusz ......:

>> >>

>> >>

>> >> We are all patiently waiting......

>> >>

>> >> Jim

>> >>

>> >> ----- Original Message -----

>> >> From: "Anthony Ayiomamitis" anthony@...

>> mailto:anthony%40perseus.gr>

>> >> mailto:anthony%40perseus.gr>>

>> >> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

>> mailto:ap-gto%40yahoogroups.com>>

>> >> Sent: Friday, May 13, 2011 10:48 AM

>> >> Subject: Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

>> >>

>> >> > Hi Harold,

>> >> >

>> >> > I received the beast in early December and, regrettably, it

>> remained

>> >> > caged up until now due to the weather. I took it out of the box

>> upon

>> >> > arrival ... drooled all over it for a good hour .... and back in

>> the

>> >> > box

>> >> > it went for what seems like eternity.

>> >> >

>> >> > I could have used it a few on the odd occasion the past two to

>> three

>> >> > weeks but the humidity was prohibitive (up to 98% on some nights

>> at 3

>> >> > AM). With twelve inches of aperture, this thing is effectively a

>> magnet

>> >> > for dew.

>> >> >

>> >> > My three days starting this evening involve much better humidity

>> and it

>> >> > is now safe to get the beast out for first light.

>> >> >

>> >> > Anthony.

>> >> >

>> >> > O/H Harold ......:

>> >> >>

>> >> >> Anthony,

>> >> >>

>> >> >> Do they have different laws of physics in Greece? In the US

>> setting up

>> >> >> such an expensive and high quality system results in at last three

>> >> >> days of rain.

>> >> >>

>> >> >> Good luck,

>> >> >> Harold

>> >> >>

>> >> >> --- In ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

>> mailto:ap-gto%40yahoogroups.com>

>> >> mailto:ap-gto%40yahoogroups.com>,

>> >> >> Anthony Ayiomamitis anthony@...> wrote:

>> >> >> >

>> >> >> > Gents,

>> >> >> >

>> >> >> > Just loaded the RHA onto the AP1200 and I am ready to rumble.

>> We are

>> >> >> > supposed to have three days of ideal skies starting this

>> evening.

>> >> >> >

>> >> >> > Although it is (quite) heavy, I managed to load the RHA with

>> saddle

>> >> >> > plate and rings myself. A few more such efforts and I will

>> start to

>> >> >> talk

>> >> >> > like Arnold.

>> >> >> >

>> >> >> > Anthony.

>> >> >> >

>> >> >>

>> >> >

>> >> >

>> >> >

>>

>

>







----------------------------

#54779 May 13, 2011

Congrats Anthony!



Thanks for the play-by-play and color commentary. Yeehaw!



:)



Pete



On May 13, 2011, at 4:47 PM, Anthony Ayiomamitis anthony@...> wrote:



> O/H Anthony Ayiomamitis ......:

> > Hi Chris,

> >

> > It looks even better in person. Really!

> >

> > Now, some first thoughts ....

> >

> > (1) once darkness approached, I pursued my usual one-star alignment

> > ... and there was a small problem since I usually use the knobs on the

> > clamps for the rings of my AP160 to get the initial star on the chip.

> > This is not the case with the RHA since the OTA and the rings are one

> > homogenous package. Since the rings are octagonal, I used one of the

> > corners - front and back rings - as a means to center visually Vega

> > for my one-star alignment. It worked perfectly since it was on the

> > ST-10XME chip without the slightest problem. I will investigate when

> > things cool down a bit (psychologically) how best to approach this

> > thing, for I have a the AP base and quick release bracket on my AP160

> > and the RHA is begging for the same

> >

> > (2) focusing ... BAD and GOOD ... my back-end is comprised of an SBIG

> > AO-8, SBIG CFW10 and ST-10XME but this bundle will not come to focus

> > on the RHA and this is something I have also experienced with my Tak

> > FSQ (the AP160 works just fine with this bundle). A mad rush to remove

> > the AO-8 unit and find/insert the original 2" nosepiece while the

> > camera was running during this time so as not to lose the gradual

> > cooling. This was the BAD.

> >

> > For the GOOD ... holy cow, this baby snaps VERY easily into perfect

> > focus and I do not care if it is f3.8. Too bad I picked up a

> > MicroTouch motor last week, for it will not be needed!

> >

> > (3) Rolando should respectfully rename the RHA to "Vacuum Cleaner".

> > Man does this thing suck in photons. My exoplanet host star for this

> > evening is mag 12.759 and the RHA while slightly defocused (on purpose

> > for such work so as to increase the S/N) is saturating the pixels with

> > one-min subs! I went from 2x2 binning (typical binning mode so as to

> > increase the S/N) back down to 1x1 binning and I am still getting a

> > flux of 400,000 ADU and an SNR of 300+ (as per Maxim/DL). All of this

> > for a pretty dim exoplanet host star at mag 12.759.

> (4) vignetting ... there is an indication that some minor vignetting is

> taking place at the edges and which reinforces the use of flats when

> doing any sort of imaging

>

> (5) ignoring the fact the AP allows one to proceed with a premature

> meridian flip, my AP160 can go two hours past the meridian before camera

> and pier will come into contact. It is quite obvious that the RHA and

> the shorter tube will allow much more than two hours and this is a

> pleasant result since there is a small part of the sky where a premature

> flip is not possible when the target of interest is around 45 degrees or so

>

> (6) guiding ... considering the fact that the RHA really sucks in those

> photons, guiding is now easier and which also means even dimmer stars

> can now be used as well. I will check on the magnitude of the guide star

> I am using right now and which is providing a max pixel value of 16,000+

> ADU with four-second subs (binned 2x2). I would not be surprised if it

> is mag 12+ !

>

> Anthony.

> >

> > More later as I am about to start the exoplanet photometry in less

> > than 10 minutes.

> >

> > Anthony.

> >

> >

> > O/H Chris Cook ......:

> >>

> >>

> >> That's a beauty setup Anthony. Can't wait for the first images.

> >>

> >> Chris

> >>

> >> ----- Original Message -----

> >> From: "Anthony Ayiomamitis" anthony@...

> >> mailto:anthony%40perseus.gr>>

> >> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>>;

> >> ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>>

> >> Sent: Friday, May 13, 2011 2:36 PM

> >> Subject: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

> >>

> >> > Hi Jim,

> >> >

> >> > I honestly wish you were here so that we could appreciate this baby in

> >> > action during the all-nighter.

> >> >

> >> > Here are some photos which I think Jeffrey asked about and which I

> >> will

> >> > have to reshoot under better lighting:

> >> >

> >> > (1) www.perseus.gr/EquipPage/equip-ota-rha-01.jpg

> >> > (2) www.perseus.gr/EquipPage/equip-ota-rha-02.jpg

> >> > (3) www.perseus.gr/EquipPage/equip-ota-rha-03.jpg

> >> >

> >> > Anthony.

> >> >

> >> > O/H Jim Janusz ......:

> >> >>

> >> >>

> >> >> We are all patiently waiting......

> >> >>

> >> >> Jim

> >> >>

> >> >> ----- Original Message -----

> >> >> From: "Anthony Ayiomamitis" anthony@...

> >> mailto:anthony%40perseus.gr>

> >> >> mailto:anthony%40perseus.gr>>

> >> >> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

> >> mailto:ap-gto%40yahoogroups.com>>

> >> >> Sent: Friday, May 13, 2011 10:48 AM

> >> >> Subject: Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

> >> >>

> >> >> > Hi Harold,

> >> >> >

> >> >> > I received the beast in early December and, regrettably, it

> >> remained

> >> >> > caged up until now due to the weather. I took it out of the box

> >> upon

> >> >> > arrival ... drooled all over it for a good hour .... and back in

> >> the

> >> >> > box

> >> >> > it went for what seems like eternity.

> >> >> >

> >> >> > I could have used it a few on the odd occasion the past two to

> >> three

> >> >> > weeks but the humidity was prohibitive (up to 98% on some nights

> >> at 3

> >> >> > AM). With twelve inches of aperture, this thing is effectively a

> >> magnet

> >> >> > for dew.

> >> >> >

> >> >> > My three days starting this evening involve much better humidity

> >> and it

> >> >> > is now safe to get the beast out for first light.

> >> >> >

> >> >> > Anthony.

> >> >> >

> >> >> > O/H Harold ......:

> >> >> >>

> >> >> >> Anthony,

> >> >> >>

> >> >> >> Do they have different laws of physics in Greece? In the US

> >> setting up

> >> >> >> such an expensive and high quality system results in at last three

> >> >> >> days of rain.

> >> >> >>

> >> >> >> Good luck,

> >> >> >> Harold

> >> >> >>

> >> >> >> --- In ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

> >> mailto:ap-gto%40yahoogroups.com>

> >> >> mailto:ap-gto%40yahoogroups.com>,

> >> >> >> Anthony Ayiomamitis anthony@...> wrote:

> >> >> >> >

> >> >> >> > Gents,

> >> >> >> >

> >> >> >> > Just loaded the RHA onto the AP1200 and I am ready to rumble.

> >> We are

> >> >> >> > supposed to have three days of ideal skies starting this

> >> evening.

> >> >> >> >

> >> >> >> > Although it is (quite) heavy, I managed to load the RHA with

> >> saddle

> >> >> >> > plate and rings myself. A few more such efforts and I will

> >> start to

> >> >> >> talk

> >> >> >> > like Arnold.

> >> >> >> >

> >> >> >> > Anthony.

> >> >> >> >

> >> >> >>

> >> >> >

> >> >> >

> >> >> >

> >>

> >

> >

>

>





[Non-text portions of this message have been removed]







----------------------------

#54780 May 13, 2011

Hey, nice work. I'm pleasantly surprised by the notes on focus. Are you

using a Robo or doing it manually. I was planning on using the micro touch

as well.



More please.



Jim

----- Original Message -----

From: "Anthony Ayiomamitis" anthony@...>

Cc: ap-ug@yahoogroups.com>; ap-gto@yahoogroups.com>

Sent: Friday, May 13, 2011 1:47 PM

Subject: Re: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble





> O/H Anthony Ayiomamitis ......:

>> Hi Chris,

>>

>> It looks even better in person. Really!

>>

>> Now, some first thoughts ....

>>

>> (1) once darkness approached, I pursued my usual one-star alignment

>> ... and there was a small problem since I usually use the knobs on the

>> clamps for the rings of my AP160 to get the initial star on the chip.

>> This is not the case with the RHA since the OTA and the rings are one

>> homogenous package. Since the rings are octagonal, I used one of the

>> corners - front and back rings - as a means to center visually Vega

>> for my one-star alignment. It worked perfectly since it was on the

>> ST-10XME chip without the slightest problem. I will investigate when

>> things cool down a bit (psychologically) how best to approach this

>> thing, for I have a the AP base and quick release bracket on my AP160

>> and the RHA is begging for the same

>>

>> (2) focusing ... BAD and GOOD ... my back-end is comprised of an SBIG

>> AO-8, SBIG CFW10 and ST-10XME but this bundle will not come to focus

>> on the RHA and this is something I have also experienced with my Tak

>> FSQ (the AP160 works just fine with this bundle). A mad rush to remove

>> the AO-8 unit and find/insert the original 2" nosepiece while the

>> camera was running during this time so as not to lose the gradual

>> cooling. This was the BAD.

>>

>> For the GOOD ... holy cow, this baby snaps VERY easily into perfect

>> focus and I do not care if it is f3.8. Too bad I picked up a

>> MicroTouch motor last week, for it will not be needed!

>>

>> (3) Rolando should respectfully rename the RHA to "Vacuum Cleaner".

>> Man does this thing suck in photons. My exoplanet host star for this

>> evening is mag 12.759 and the RHA while slightly defocused (on purpose

>> for such work so as to increase the S/N) is saturating the pixels with

>> one-min subs! I went from 2x2 binning (typical binning mode so as to

>> increase the S/N) back down to 1x1 binning and I am still getting a

>> flux of 400,000 ADU and an SNR of 300+ (as per Maxim/DL). All of this

>> for a pretty dim exoplanet host star at mag 12.759.

> (4) vignetting ... there is an indication that some minor vignetting is

> taking place at the edges and which reinforces the use of flats when

> doing any sort of imaging

>

> (5) ignoring the fact the AP allows one to proceed with a premature

> meridian flip, my AP160 can go two hours past the meridian before camera

> and pier will come into contact. It is quite obvious that the RHA and

> the shorter tube will allow much more than two hours and this is a

> pleasant result since there is a small part of the sky where a premature

> flip is not possible when the target of interest is around 45 degrees or

> so

>

> (6) guiding ... considering the fact that the RHA really sucks in those

> photons, guiding is now easier and which also means even dimmer stars

> can now be used as well. I will check on the magnitude of the guide star

> I am using right now and which is providing a max pixel value of 16,000+

> ADU with four-second subs (binned 2x2). I would not be surprised if it

> is mag 12+ !

>

> Anthony.

>>

>> More later as I am about to start the exoplanet photometry in less

>> than 10 minutes.

>>

>> Anthony.

>>

>>

>> O/H Chris Cook ......:

>>>

>>>

>>> That's a beauty setup Anthony. Can't wait for the first images.

>>>

>>> Chris

>>>

>>> ----- Original Message -----

>>> From: "Anthony Ayiomamitis" anthony@...

>>> mailto:anthony%40perseus.gr>>

>>> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>>;

>>> ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>>

>>> Sent: Friday, May 13, 2011 2:36 PM

>>> Subject: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

>>>

>>> > Hi Jim,

>>> >

>>> > I honestly wish you were here so that we could appreciate this baby in

>>> > action during the all-nighter.

>>> >

>>> > Here are some photos which I think Jeffrey asked about and which I

>>> will

>>> > have to reshoot under better lighting:

>>> >

>>> > (1) www.perseus.gr/EquipPage/equip-ota-rha-01.jpg

>>> > (2) www.perseus.gr/EquipPage/equip-ota-rha-02.jpg

>>> > (3) www.perseus.gr/EquipPage/equip-ota-rha-03.jpg

>>> >

>>> > Anthony.

>>> >

>>> > O/H Jim Janusz ......:

>>> >>

>>> >>

>>> >> We are all patiently waiting......

>>> >>

>>> >> Jim

>>> >>

>>> >> ----- Original Message -----

>>> >> From: "Anthony Ayiomamitis" anthony@...

>>> mailto:anthony%40perseus.gr>

>>> >> mailto:anthony%40perseus.gr>>

>>> >> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

>>> mailto:ap-gto%40yahoogroups.com>>

>>> >> Sent: Friday, May 13, 2011 10:48 AM

>>> >> Subject: Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

>>> >>

>>> >> > Hi Harold,

>>> >> >

>>> >> > I received the beast in early December and, regrettably, it

>>> remained

>>> >> > caged up until now due to the weather. I took it out of the box

>>> upon

>>> >> > arrival ... drooled all over it for a good hour .... and back in

>>> the

>>> >> > box

>>> >> > it went for what seems like eternity.

>>> >> >

>>> >> > I could have used it a few on the odd occasion the past two to

>>> three

>>> >> > weeks but the humidity was prohibitive (up to 98% on some nights

>>> at 3

>>> >> > AM). With twelve inches of aperture, this thing is effectively a

>>> magnet

>>> >> > for dew.

>>> >> >

>>> >> > My three days starting this evening involve much better humidity

>>> and it

>>> >> > is now safe to get the beast out for first light.

>>> >> >

>>> >> > Anthony.

>>> >> >

>>> >> > O/H Harold ......:

>>> >> >>

>>> >> >> Anthony,

>>> >> >>

>>> >> >> Do they have different laws of physics in Greece? In the US

>>> setting up

>>> >> >> such an expensive and high quality system results in at last three

>>> >> >> days of rain.

>>> >> >>

>>> >> >> Good luck,

>>> >> >> Harold

>>> >> >>

>>> >> >> --- In ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

>>> mailto:ap-gto%40yahoogroups.com>

>>> >> mailto:ap-gto%40yahoogroups.com>,

>>> >> >> Anthony Ayiomamitis anthony@...> wrote:

>>> >> >> >

>>> >> >> > Gents,

>>> >> >> >

>>> >> >> > Just loaded the RHA onto the AP1200 and I am ready to rumble.

>>> We are

>>> >> >> > supposed to have three days of ideal skies starting this

>>> evening.

>>> >> >> >

>>> >> >> > Although it is (quite) heavy, I managed to load the RHA with

>>> saddle

>>> >> >> > plate and rings myself. A few more such efforts and I will

>>> start to

>>> >> >> talk

>>> >> >> > like Arnold.

>>> >> >> >

>>> >> >> > Anthony.

>>> >> >> >

>>> >> >>

>>> >> >

>>> >> >

>>> >> >

>>>

>>

>>

>

>

>

---------------

>

>

> To UNSUBSCRIBE, or for general information on the ap-ug list

> see groups.yahoo.com/group/ap-ugYahoo! Groups Links

>

>

>

>







----------------------------

#54781 May 13, 2011

Jim,



It is strictly manual using the two-speed focuser.



We just had a change in the ambient temperature by about 1.5 degrees and

the FWHM on the guide star has remained steady between 1.60 and 1.80.

This needs some thought since the target is also gaining altitude and,

as a result, we have various factors at play simultaneously.



Anthony.



O/H Jim Janusz ......: >

>

> Hey, nice work. I'm pleasantly surprised by the notes on focus. Are you

> using a Robo or doing it manually. I was planning on using the micro

> touch

> as well.

>

> More please.

>

> Jim

>

> ----- Original Message -----

> From: "Anthony Ayiomamitis" anthony@...

> mailto:anthony%40perseus.gr>>

> Cc: ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>>;

> ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>>

> Sent: Friday, May 13, 2011 1:47 PM

> Subject: Re: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

>

> > O/H Anthony Ayiomamitis ......:

> >> Hi Chris,

> >>

> >> It looks even better in person. Really!

> >>

> >> Now, some first thoughts ....

> >>

> >> (1) once darkness approached, I pursued my usual one-star alignment

> >> ... and there was a small problem since I usually use the knobs on the

> >> clamps for the rings of my AP160 to get the initial star on the chip.

> >> This is not the case with the RHA since the OTA and the rings are one

> >> homogenous package. Since the rings are octagonal, I used one of the

> >> corners - front and back rings - as a means to center visually Vega

> >> for my one-star alignment. It worked perfectly since it was on the

> >> ST-10XME chip without the slightest problem. I will investigate when

> >> things cool down a bit (psychologically) how best to approach this

> >> thing, for I have a the AP base and quick release bracket on my AP160

> >> and the RHA is begging for the same

> >>

> >> (2) focusing ... BAD and GOOD ... my back-end is comprised of an SBIG

> >> AO-8, SBIG CFW10 and ST-10XME but this bundle will not come to focus

> >> on the RHA and this is something I have also experienced with my Tak

> >> FSQ (the AP160 works just fine with this bundle). A mad rush to remove

> >> the AO-8 unit and find/insert the original 2" nosepiece while the

> >> camera was running during this time so as not to lose the gradual

> >> cooling. This was the BAD.

> >>

> >> For the GOOD ... holy cow, this baby snaps VERY easily into perfect

> >> focus and I do not care if it is f3.8. Too bad I picked up a

> >> MicroTouch motor last week, for it will not be needed!

> >>

> >> (3) Rolando should respectfully rename the RHA to "Vacuum Cleaner".

> >> Man does this thing suck in photons. My exoplanet host star for this

> >> evening is mag 12.759 and the RHA while slightly defocused (on purpose

> >> for such work so as to increase the S/N) is saturating the pixels with

> >> one-min subs! I went from 2x2 binning (typical binning mode so as to

> >> increase the S/N) back down to 1x1 binning and I am still getting a

> >> flux of 400,000 ADU and an SNR of 300+ (as per Maxim/DL). All of this

> >> for a pretty dim exoplanet host star at mag 12.759.

> > (4) vignetting ... there is an indication that some minor vignetting is

> > taking place at the edges and which reinforces the use of flats when

> > doing any sort of imaging

> >

> > (5) ignoring the fact the AP allows one to proceed with a premature

> > meridian flip, my AP160 can go two hours past the meridian before camera

> > and pier will come into contact. It is quite obvious that the RHA and

> > the shorter tube will allow much more than two hours and this is a

> > pleasant result since there is a small part of the sky where a premature

> > flip is not possible when the target of interest is around 45

> degrees or

> > so

> >

> > (6) guiding ... considering the fact that the RHA really sucks in those

> > photons, guiding is now easier and which also means even dimmer stars

> > can now be used as well. I will check on the magnitude of the guide star

> > I am using right now and which is providing a max pixel value of 16,000+

> > ADU with four-second subs (binned 2x2). I would not be surprised if it

> > is mag 12+ !

> >

> > Anthony.

> >>

> >> More later as I am about to start the exoplanet photometry in less

> >> than 10 minutes.

> >>

> >> Anthony.

> >>

> >>

> >> O/H Chris Cook ......:

> >>>

> >>>

> >>> That's a beauty setup Anthony. Can't wait for the first images.

> >>>

> >>> Chris

> >>>

> >>> ----- Original Message -----

> >>> From: "Anthony Ayiomamitis" anthony@...

> mailto:anthony%40perseus.gr>

> >>> mailto:anthony%40perseus.gr>>

> >>> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

> mailto:ap-gto%40yahoogroups.com>>;

> >>> ap-ug@yahoogroups.com mailto:ap-ug%40yahoogroups.com>

> mailto:ap-ug%40yahoogroups.com>>

> >>> Sent: Friday, May 13, 2011 2:36 PM

> >>> Subject: [ap-ug] Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

> >>>

> >>> > Hi Jim,

> >>> >

> >>> > I honestly wish you were here so that we could appreciate this

> baby in

> >>> > action during the all-nighter.

> >>> >

> >>> > Here are some photos which I think Jeffrey asked about and which I

> >>> will

> >>> > have to reshoot under better lighting:

> >>> >

> >>> > (1) www.perseus.gr/EquipPage/equip-ota-rha-01.jpg

> >>> > (2) www.perseus.gr/EquipPage/equip-ota-rha-02.jpg

> >>> > (3) www.perseus.gr/EquipPage/equip-ota-rha-03.jpg

> >>> >

> >>> > Anthony.

> >>> >

> >>> > O/H Jim Janusz ......:

> >>> >>

> >>> >>

> >>> >> We are all patiently waiting......

> >>> >>

> >>> >> Jim

> >>> >>

> >>> >> ----- Original Message -----

> >>> >> From: "Anthony Ayiomamitis" anthony@...

> mailto:anthony%40perseus.gr>

> >>> mailto:anthony%40perseus.gr>

> >>> >> mailto:anthony%40perseus.gr>>

> >>> >> To: ap-gto@yahoogroups.com mailto:ap-gto%40yahoogroups.com>

> mailto:ap-gto%40yahoogroups.com>

> >>> mailto:ap-gto%40yahoogroups.com>>

> >>> >> Sent: Friday, May 13, 2011 10:48 AM

> >>> >> Subject: Re: [ap-gto] Re: AP 305 RHA .... ready to rumble

> >>> >>

> >>> >> > Hi Harold,

> >>> >> >

> >>> >> > I received the beast in early December and, regrettably, it

> >>> remained

> >>> >> > caged up until now due to the weather. I took it out of the box

> >>> upon

> >>> >> > arrival ... drooled all over it for a good hour .... and back in

> >>> the

> >>> >> > box

> >>> >> > it went for what seems like eternity.

> >>> >> >

> >>> >> > I could have used it a few on the odd occasion the past two to

> >>> three

> >>> >> > weeks but the humidity was prohibitive (up to 98% on some nights

> >>> at 3

> >>> >> > AM). With twelve inches of aperture, this thing is effectively a

> >>> magnet

> >>> >> > for dew.

> >>> >> >

> >>> >> > My three days starting this evening involve much better humidity

> >>> and it

> >>> >> > is now safe to get the beast out for first light.

> >>> >> >

> >>> >> > Anthony.

> >>> >> >

> >>> >> > O/H Harold ......:

> >>> >> >>

> >>> >> >> Anthony,

> >>> >> >>

> >>> >> >> Do they have different laws of physics in Greece? In the US

> >>> setting up

> >>> >> >> such an expensive and high quality system results in at last

> three

> >>> >> >> days of rain.

> >>> >> >>

> >>> >> >> Good luck,

> >>> >> >> Harold

> >>> >> >>

> >>> >> >> --- In ap-gto@yahoogroups.com

> mailto:ap-gto%40yahoogroups.com> mailto:ap-gto%40yahoogroups.com>

> >>> mailto:ap-gto%40yahoogroups.com>

> >>> >> mailto:ap-gto%40yahoogroups.com>,

> >>> >> >> Anthony Ayiomamitis anthony@...> wrote:

> >>> >> >> >

> >>> >> >> > Gents,

> >>> >> >> >

> >>> >> >> > Just loaded the RHA onto the AP1200 and I am ready to rumble.

> >>> We are

> >>> >> >> > supposed to have three days of ideal skies starting this

> >>> evening.

> >>> >> >> >

> >>> >> >> > Although it is (quite) heavy, I managed to load the RHA with

> >>> saddle

> >>> >> >> > plate and rings myself. A few more such efforts and I will

> >>> start to

> >>> >> >> talk

> >>> >> >> > like Arnold.

> >>> >> >> >

> >>> >> >> > Anthony.

> >>> >> >> >

> >>> >> >>

> >>> >> >

> >>> >> >

> >>> >> >

> >>>

> >>

> >>

> >

> >

> >

---------------

> >

> >

>







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