A Near Infrared Telescope in Solar Orbit - NIRST

Details A Near Infrared Telescope in Solar Orbit - NIRST A Near Infrared Telescope in Solar Orbit - NIRST

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.7202w&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #72.02; Bulletin of the American Astronomical Society, Vol. 27, p.1388

Astronomy and Astrophysics

Astronomy

Scientific paper

The NIRST concept considers a meter-class telescope in a heliocentric orbit that trails slightly behind the Earth. It will be passively cooled to temperatures low enough to operate sensitive, large format InSb arrays. The strawman design in the proposal used an 85 cm diameter telescope and an instrument package with no moving parts: a two-color 3.2 mu m and 4.6 mu m camera with 1024 x 1024 pixels covering a 15(') x 15(') FOV, and a low resolution spectrograph (lambda /Delta lambda ~ 100) which will observe 5 long slits simultaneously. This simple instrument will detect sources as faint as 50 nJy at 3.2 mu m (L ~ 24.5) and 180 nJy at 4.6 mu m (M ~ 22.5), and obtain spectra to L ~ 20. The wavelengths covered by NIRST will be ideal for observing the light of older, slower evolving stars in distant (z > 2) galaxies and the thermal emission from old, cool brown dwarfs, since the methane absorption seen in Jupiter and GL 229B will suppress the 2.2 mu m emission visible from the ground.

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