[vsnet-chat 2618] Re: Tmz85

[Taichi Kato <tkato>]

Re: [vsnet-chat 2617] Tmz85

  Lew, congratulations to your successful observations!

> After 3 weeks of cloudy nights, I am finally imaging Tmz85, but it is
> very faint - not visible on the 16 second images which have a limit
> of mag. ~16 - 17. I will have to stack at least 4 frames to do
> photometry on anything at all.

    Before stacking (even if it eventially turns out to be unavoidable),
please try to put the aperture or PSF on the calculated coordinates of
the variable and get counts, even if they may be negative.  These relative
counts of the variable (to the comparison) can be later stacked, or phase
averaged, to get both better statistics and high time-resolution.  This is
the well-established technique in such faint, and rapidly varying objects.
We strongly prefer individual data points.

Regards,
Taichi Kato

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