Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994exa.....3..119b&link_type=abstract
Experimental Astronomy, vol. 3, no. 1-4, p. 119-120
Astronomy and Astrophysics
Astronomy
Arrays, Indium Antimonides, Infrared Astronomy, Infrared Detectors, Infrared Telescopes, Rocket-Borne Instruments, Brown Dwarf Stars, Galactic Evolution
Scientific paper
The high sensitivity of large format InSb arrays can be used to obtain deep images of the sky at 3-5 micrometers. In this spectral range cool or highly redshifted objects (e.g. brown dwarfs and protogalaxies) which are not visible at shorter wavelengths may be observed. Sensitivity at these wavelengths in ground-based observations is severly limited by the thermal flux from the telescope and from the earth's atmosphere. The Near Infrared Faint-Object Telescope Experiment (NIFTE), a 50 cm cooled rocket-borne telescope combined with large format, high performance InSb arrays, can reach a limiting flux less than 1 micro-Jy(1-sigma) over a large field-of-view in a single flight. In comparison, the Infrared Space Observatory (ISO) will require days of observation to reach a sensitivity more than one order of magnitude worse over a similar area of the sky. The deep 3-5 micrometer images obtained by the rocket-borne telescope will assist in determining the nature of faint red objects detected by ground-based telescopes at 2 micrometers, and by ISO at wavelengths longer than 5 micrometers.
Bock James Joseph
Eisenhardt Peter B.
Hacking Perry B.
Lange Andrew E.
Matsumoto Toshio
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