Averaging Error from several reports

American Association of Variable Star Observers (AAVSO)
Fri, 04/24/2015 - 09:11

Making several images with several telescopes results in stacks of images per telescope used for photometry.

Result is then a multitude of reports with mags and corresponding error indication.

Is there a standard procedure for consolidating such reports?

Averaging the mags is certainly easy - but how to handle the error values statistically correct is somewhat unclear to me. Any suggestions?