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Hi all!

I'm very new at this, so probably this is a very easy question ;) :

I'm following the citizensky tutorial on DSLR photometry, using IRIS as my software package and the intermediate reduction spreadsheet. I stack around 10 images for each star and measure the magnitude on the final image.

But I don't know how to compute the measurement errors. Can I use the comp. stars fit value error and the check star error to compute the standard deviation of my measurement?

If not, how can I use IRIS to calculate it? I've read that using the "stat" command gives you the sigma value of the image, but I don't know what to do with that.

Thanks!

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Last Updated: June 12, 2012 - 5:16am

Last Updated: June 12, 2012 - 5:16am

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**Links:**

[1] http://www.aavso.org/forums/variable-star-observing/photometry