[Aavso-photometry] Baseline photometry of HD 74156 at CBA Belgium Observatory - results

[Tonny Vanmunster]

Correct - that I did also some time ago with another bright target, and I
could indeed almost double my exposure time.

Best,
Tonny 

-----Original Message-----
From: Radu Corlan [mailto:rcorlan at pcnet.ro] 
Sent: Saturday, December 04, 2004 1:49 AM
To: Tonny Vanmunster
Cc: Aavso-Photometry
Subject: Re: [Aavso-photometry] Baseline photometry of HD 74156 at CBA
Belgium Observatory - results

> The resulting light curve depicts - as expected - a nearly flat 
> pattern. The level of noise is higher than what I'd like to see, and 
> likely is caused by
> : (1) scintillation because of too short exposure times, (2) a nearby 
> moon,
> (3) poor photometric sky conditions. I reached an overall accuracy of 
> about
> 0.005 mag, which will need to be increased for the next campaign. To 
> further improve precision, I will have to stop down aperture of my 
> telescope by using a mask with a cutout hole.

Tonny,

one more thing: if you use your camera unbinned, you can generally double
your exposure: the charge capacity of the binned pixel is about twice that
of the unbinned pixel, while it' area is four times larger. 

Radu

> 
> Best regards,
> Tonny
> 
> Tonny Vanmunster
> CBA Belgium Observatory
> http://www.cbabelgium.com
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-- 

-------------
Radu Corlan       Snail Mail: Bucuresti sect. 1, 
rcorlan at pcnet.ro  str. Argentina nr. 28, Romania

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