CCD Side 2 Gain Ratio Test

Details CCD Side 2 Gain Ratio Test CCD Side 2 Gain Ratio Test

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9611d&link_type=abstract

HST Proposal ID #9611

Physics

Hst Proposal Id #9611

Scientific paper

Observe a bright spectrophotometric standard star at the center of the detector with a wide slit {52x2} with the 3 low dispersion gratings at gain 1 and gain 4, so that the ratio of gain 4 to gain 1 can be measured. {This will be used to calibrate gain 4 relative to gain 1, which is already well measured.} Read out some additional exposures through non-default amplifier B, which is used for some calibration programs, so that the gains of amp B relative to amp D can be measured. Place the target at row 900, close to the D amplifier and far from the B amplifier, then take long and short exposures with G230LB with both amplifiers, so that CTE can be measured over a broad range of counts. With gain 4/1, amp B/D, and CTE known from these measurements, find the sensitivity at row 900 relative to the central row.

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