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Measuring EUV Line Emission from the Hot Interstellar Medium

Published online by Cambridge University Press:  12 April 2016

Simon Labov ,
Christopher Martin  and
Stuart Bowyer
Simon Labov
Affiliation:
Space Sciences Laboratory, University of California, Berkeley
Christopher Martin
Affiliation:
Space Sciences Laboratory, University of California, Berkeley
Stuart Bowyer
Affiliation:
Space Sciences Laboratory, University of California, Berkeley

Abstract

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In the local interstellar medium, the presence of hot gas (log T ~ 5 to 6) has been inferred from measurements of oxygen VI absorption in the ultraviolet, and from diffuse emission in the extreme ultraviolet (EUV) and soft X-ray regions. Here we describe a spectrometer that is very sensitive to gas in this temperature range. The spectrometer uses an array of plane-ruled gratings at grazing incidence in the extreme off plane mount. A set of Kirkpatrick-Baez mirrors focuses the conically diffracted light on to one of two microchannel plate detectors. The field of view of the instrument is 0.2° by 12°. The predicted sensitivity ranges from 50 to 200 ph/(cm2 sec str) with a resolving power (λ/Δλ) of 15 to 50 over the 50 to 700A wavelength band. The instrument is currently under construction for a sounding rocket flight.

Type
Things To Come
Information
International Astronomical Union Colloquium , Volume 81: Local Interstellar Medium , 1984 , pp. 348 - 352
Copyright
Copyright © NASA 1984

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