The Pan-American Astrophysics Explorer (PAX) - A Small Explorer far UV survey mission

Details The Pan-American Astrophysics Explorer (PAX) - A Small Explorer far UV survey mission The Pan-American Astrophysics Explorer (PAX) - A Small Explorer far UV survey mission

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1235..878m&link_type=abstract

IN: Instrumentation in astronomy VII; Proceedings of the Meeting, Tucson, AZ, Feb. 13-17, 1990 (A91-29601 11-35). Bellingham, WA

Astronomy and Astrophysics

Astronomy

Astronomical Spectroscopy, Intergalactic Media, Sky Surveys (Astronomy), Spaceborne Telescopes, Stellar Evolution, Active Galactic Nuclei, Cosmic Dust, Microchannel Plates, Spectrophotometry, White Dwarf Stars

Scientific paper

NASA plans for PAX, a photometric and spectroscopic FUV survey mission utilizing a Small Explorer spacecraft, are summarized. PAX is to perform an all-sky survey to limiting magnitude 18 at 140 and 180 nm, deep surveys of selected areas to 21 mag in the same bands, and a spectroscopic survey of 2 percent of the sky to 18 mag. The PAX telescope parameters include diameter 33 cm, focal length 72 cm, plate scale 0.3 arcsec/micron, focal ratio 2.2, FOV 4.8 deg, and system angular resolution 15 arcsec; the microchannel-plate detector employs CsI/KBr photocathodes and a mosaic wedge-and-strip readout scheme. The principal scientific aim of PAX is to increase by a factor of 100-1000 the number of known galactic nuclei, QSOs, active galaxies, white dwarfs, cataclysmic variables, and evolved stars. The mission should also provide new insights into post-main-sequence stellar evolution, star formation in normal galaxies, the distribution of dust in the Galaxy, and the ionization and large-scale distribution of the intergalactic medium.

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