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Gaba_p |
11/03/2016 05:22PM (Read 1034 times)
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Status: offline
Registered: 10/10/2008
Posts: 104
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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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Gaba_p |
11/03/2016 05:32PM
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Status: offline
Registered: 10/10/2008
Posts: 104
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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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fitz |
11/14/2016 05:42PM
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Status: offline
Registered: 09/30/2005
Posts: 4040
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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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