Photometric characterization of the U.S. Naval Observatory HgCdTe IR camera

Details Photometric characterization of the U.S. Naval Observatory HgCdTe IR camera Photometric characterization of the U.S. Naval Observatory HgCdTe IR camera

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2475...88l&link_type=abstract

Proc. SPIE Vol. 2475, p. 88-96, Infrared Detectors and Instrumentation for Astronomy, Albert M. Fowler; Ed.

Astronomy and Astrophysics

Astronomy

1

Scientific paper

An IR camera based on a Rockwell 256 X 256 HgCdTe (NICMOS III) array has been recently acquired by the U.S. Naval Observatory as part of a program to evaluate the astrometric characteristics of current-generation IR arrays. Results of a pixel-by-pixel photometric evaluation of this HgCdTe device are presented. Overall, the array is of extremely high quality with less than 100 (0.2%) photometrically unusable pixels. With a fairly stringent photometric selection based on linearity and full well, the bad pixel count is about 420. The average pixel photometric response is linear to within about 1.6% rms over a range of 0 - 120,000 e(superscript -); using a quadratic relation reduces the calibration errors to under 1% rms. For comparison, the results of a similar test with a Texas Instruments TI800 X 800 CCD (a prototype of the HST WF/PC 1) are shown.

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