emGain: Determination of EM gain of CCD

Details emGain: Determination of EM gain of CCD emGain: Determination of EM gain of CCD

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012ascl.soft01004d&link_type=abstract

Astrophysics Source Code Library, record ascl:1201.004

Astronomy and Astrophysics

Astrophysics

Scientific paper

The determination of the EM gain of the CCD is best done by fitting the histogram of many low-light frames. Typically, the dark+CIC noise of a 30ms frame itself is a sufficient amount of signal to determine accurately the EM gain with about 200 512x512 frames. The IDL code emGain takes as an input a cube of frames and fit the histogram of all the pixels with the EM stage output probability function. The function returns the EM gain of the frames as well as the read-out noise and the mean signal level of the frames.

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