The SPEAR Instrument and On-Orbit Performance

Details The SPEAR Instrument and On-Orbit Performance The SPEAR Instrument and On-Orbit Performance

2006-01-26

arxiv.org/abs/astro-ph/0601588v1

Astrophys.J. 644 (2006) L159-L162

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1086/505205

The SPEAR (or 'FIMS') instrumentation has been used to conduct the first large-scale spectral mapping of diffuse cosmic far ultraviolet (FUV, 900-1750 AA) emission, including important diagnostics of interstellar hot (10^4 K - 10^6 K) and photoionized plasmas, H_2, and dust scattered starlight. The instrumentation's performance has allowed for the unprecedented detection of astrophysical diffuse far UV emission lines. A spectral resolution of 550 and an imaging resolution of 5' is achieved on-orbit in the Short (900 - 1175 AA) and Long (1335 - 1750 AA) bandpass channels within their respective 7.4 deg x 4.3' and 4.0 deg x 4.6' fields of view. We describe the SPEAR imaging spectrographs, their performance, and the nature and handling of their data.

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