Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.0914m&link_type=abstract
American Astronomical Society, 180th AAS Meeting, #09.14; Bulletin of the American Astronomical Society, Vol. 24, p.743
Astronomy and Astrophysics
Astronomy
1
Scientific paper
Two different near infrared array detectors with 256x256 formats have been operated successfully at the new Infrared Imaging Detector Lab at UCLA; the lab and team were developed from scratch in Fall 1989. The first of these detectors is an engineering-grade NICMOS III mercury-cadmium-telluride (HgCdTe) array manufactured by Rockwell International. This detector (provided by P.I. Rodger Thompson, NICMOS project, Steward Observatory (NASA/GSFC NAS5-31289) to NICMOS Co-I. Becklin) has been characterized by laboratory experiments and has also been commissioned in an astronomical camera system named KCam at the University of California Observatories 1-m telescope on Mt. Hamilton. The QE at 2 microns is 60\ Correlated Double Sampling mode is 47 e. Multiple Sampling with 4 non-destructive readouts has reduced the total noise to 26 e. KCam is a simple imaging system optimized for surveys and photometry in the 2 micron window. With a K' filter the total system throughput is about 25\ 12.5 mag/sq. arcsec and the observed, background-limited sensitivity is 3 sigma, 30 minutes = 17.8 for a point source within 3.4 x 3.4 arcsec; one pixel is 0.48 arcsec. This instrument has been used, for example, in a search for brown dwarf candidates in the Hyades cluster and for photometry of RR Lyrae stars in heavily reddened globular clusters towards the Galactic Center. The second detector is the indium antimonide (InSb) array from Santa Barbara Research Center. First light was obtained in March 1992 and the latest results will be presented. Under development at UCLA is a two-color imaging system in which a dichroic beam-splitter is used to enable two wavelengths to be observed simultaneously; each channel will contain a 256x256 array. This camera, which is supported by an NSF grant, will provide a field of 64 arcsecs at 0.25 arcsec per pixel at the f/15 foci of the W.M. Keck 10-m telescope.
Becklin Eric E.
Brims George
Canfield John
Casement Suzanne
Henriquez Frank
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