Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992japa...13..129p&link_type=abstract
Journal of Astrophysics and Astronomy (ISSN 0250-6335), vol. 13, no. 1, March 1992, p. 129-144.
Astronomy and Astrophysics
Astrophysics
6
Astronomical Observatories, Calibrating, Charge Coupled Devices, Astronomical Photometry, Astronomical Spectroscopy, Telescopes
Scientific paper
The system gain of two CCD systems in regular use at the Vainu Bappu Observatory, Kavalur, is determined at a few gain settings. The procedure used for the determination of system gain and base-level noise is described in detail. The Photometrics CCD system at the 1-m reflector uses a Thomson-CSF TH 7882 CDA chip coated for increased ultraviolet sensitivity. The gain is program-selected through the parameter 'cgain' varying between 0 and 4095 in steps of 1. The inverse system gain for this system varies almost linearly from 27.7 electrons/DN at cgain = 0 to 1.5 electrons/DN at cgain = 500. The readout noise is less than or approximately equal to 11 electrons at cgain = 66. The Astromed CCD system at 2.3-m Vainu Bappu Telescope uses a GEC P8603 chip which is also coated for enhanced ultraviolet sensitivity. The amplifier gain is selected in discrete steps using switches in the controller. The inverse system gain is 4.15 electrons/DN at the gain setting of 9.2, and the readout noise of about 8 electrons.
Anupama G. C.
Divakara Mayya Y.
Prabhu Tushar P.
No associations
LandOfFree
Gain calibration of CCD systems at VBO does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Gain calibration of CCD systems at VBO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gain calibration of CCD systems at VBO will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1218892