HEAO 1 A-2 low-energy detector X-ray spectra of the Cygnus Loop

Details HEAO 1 A-2 low-energy detector X-ray spectra of the Cygnus Loop HEAO 1 A-2 low-energy detector X-ray spectra of the Cygnus Loop

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...363..547l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 363, Nov. 10, 1990, p. 547-553. Research supported by NSERC.

Astronomy and Astrophysics

Astrophysics

7

Cygnus Constellation, Heao 1, Nebulae, Supernova Remnants, X Ray Sources, Astronomical Spectroscopy, Emission Spectra, Stellar Temperature, X Ray Spectra

Scientific paper

The Cygnus Loop supernova remnant was observed by the A-2 low-energy detector (LED) proportional counters on the HEAO 1 satellite. Recent improvements to the non-X-ray background rejection and detector response simulation have allowed production of the most accurate spectra of the Cygnus Loop to date. Three separate regions of the Cygnus Loop were observed. Single-temperature, Raymond-Smith models are inadequate to describe the spectra, but two component model fits are good. Temperature, column density, and emission measure variations across the Cygnus Loop are found. These results are interpreted and compared with previous work.

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