Re:A couple of light curves


Nov 11, 2007

 


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#19904 Nov 11, 2007

Nice clean data Anthony. Good work.



BTW, Ambient : + 13.4 . C is not what we consider paradise in SoCal

;-)

--- In ap-gto@yahoogroups.com, "ayiomamitis" ayiomami@...> wrote:

>

> Dear group,

>

> With the weather being very unstable here in paradise, I decided to

> pursue some differential photometry involving a couple of well-known

> variables.

>

> I kindly direct you to the light curves for AB And as well as GP

And.

>

> www.perseus.gr/Astro-Photometry-And-AB-20071108.htm

> www.perseus.gr/Astro-Photometry-And-GP-20071108.htm

>

> I am quite eager to pursue Algol and I will post a follow-up message

> when I have something for presentation.

>

> Clear skies!

>

> Anthony.

>



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

#19905 Nov 11, 2007

Anthony,

Well Done.!!!! Nice to see some folks doing a bit of science and

trying photometry or astrometry.

Its great to work on short period vars so you can see things happen

over a couple of hours.



Don't forget that you can also shoot 2x2 binned to save disk space

and makes it easier to work with the smaller files.



Keep up the great work.!!

cheers,

...paul.



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

#19913 Nov 12, 2007

--- In ap-gto@yahoogroups.com, Paul Mortfield paul@...> wrote: >

> Anthony,



Paul et al,

> Well Done.!!!!



Thanks for the kind words.

> Nice to see some folks doing a bit of science and

> trying photometry or astrometry.



It is a nice (temporary) diversion and ideal for less than ideal

situations (ex. when the moon is around).

> Its great to work on short period vars so you can see things happen

> over a couple of hours.



Precisely. I have been digging around and have managed to identify

lots of short period eclipsing binaries and which I would like to

knock off systematically. It is really fun watching these magnitude

changes occur right in front of you.

>

> Don't forget that you can also shoot 2x2 binned to save disk space

> and makes it easier to work with the smaller files.



Yes, whenever possible, I do use 2x2 binning. In some cases the

eclipsing binary is very close to another star and I must use 1x1 so

as to have a good definition of the perimeter of my variable of interest.



My ST-2000XM is ABG and which required some work to identify at which

point (in ADU) it becomes non-linear (which is around 23000 ADU). As a

result, my exposures are always with this limit in mind so as to

ensure I preserve my linearity.



Thanks again everyone!



Anthony.

>

> Keep up the great work.!!

> cheers,

> ...paul.

>



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