Photometric Analysis with Astroart 3.0

Image processing, astrometry, photometry, etc.
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Forum_2016
Posts: 219
Joined: 08 Dec 2018, 13:30

Photometric Analysis with Astroart 3.0

Post by Forum_2016 »

What does the Err Mag column in the Find Stars window indicate, after a Photometric Analysis? With my current
report, i see an Err Mag ranging from 0.28 to 0.61.

Vittal

Forum_2016
Posts: 219
Joined: 08 Dec 2018, 13:30

Re: Photometric Analysis with Astroart 3.0

Post by Forum_2016 »

Hello, those values are only the residual of the least-square interpolation. They are not very important since they are related to the "interpolation" (ensemble) photometry which is rarely used (and you cannot do it well with the star catalogs of AA3). Instead, I suggest to start working in ADU using the instructions of the AAVSO CCD manual: https://www.aavso.org/ccd-photometry-gude then transform the ADU to mag using an excel sheet like explained in the AAVSO manual.

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