Computer Science
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hstc.work..171s&link_type=abstract
The 1997 HST Calibration Workshop with a New Generation of Instruments, p. 171
Computer Science
2
Cameras, Calibrating, Cosmic Rays, Radiation Detectors, Imaging Spectrometers, Onboard Equipment, Radiation Tolerance, Linearity, Noise Measurement, Dark Current, Near Infrared Radiation
Scientific paper
We present an overview of the properties of the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) flight detectors as measured on-orbit, including the flat-field response, the dark current, the linearity, and the read-noise. We show for the first time all the dependencies of the various components of a NICMOS dark exposure, and show how to generate 'synthetic' dark current calibration files. An unexpected time-varying bias known as the 'pedestal', is described, along with some efforts to remedy it. We describe the effects on the detectors of exposure to very bright sources, and finally, we briefly describe the sensitivity of NICMOS to cosmic rays.
Bergeron Louis E.
Daou Doris
Skinner Christopher J.
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