An exposure guide for taking twilight flatfields with large format CCDs

Details An exposure guide for taking twilight flatfields with large format CCDs An exposure guide for taking twilight flatfields with large format CCDs

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....105.1206t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 105, no. 3, p. 1206-1212.

Astronomy and Astrophysics

Astronomy

13

Charge Coupled Devices, Exposure, Twilight Glow, Brightness, Fortran, Rayleigh Scattering

Scientific paper

A simple analytic expression and a sample lookup table are provided which an observer can use to determine both the ideal exposure times and the total number of exposure that can be taken when seeking a series of twilight flatfields. The method is expected to be most useful for large format CCDs, where the rapidly changing surface brightness of the dawn or dusk sky creates great uncertainty during the extended readout times.

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