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


May 13, 2011

 


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

#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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