Imexamine:

Gabriel wrote on Nov 03, 2016

The output of imexamine's 'a' (performed over a star) includes the "mean background" in the column named 'SKY'.

What is the difference with the 'm' column 'STDDEV' performed on a sky region?

Shouldn't these two parameters be equivalent?

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Gabriel wrote on Nov 03, 2016

I messed up the title of the post, but there's apparently no way to edit it or to remove the post...

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Mike Fitzpatrick wrote on Nov 14, 2016

The 'm' key does straight image statistics on a rectangular region, however the 'a' key fits a surface when computing the sky background within the object aperture. The two results should be close but not necessarily equal.

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Last post on Nov 14, 2016