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Title:
X-ray observations of supernova remnants resembling the Crab Nebula
Authors:
Wilson, A. S.
Affiliation:
AA(Hawaii, University, Honolulu)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 302, March 15, 1986, p. 718-726. (ApJ Homepage)
Publication Date:
03/1986
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
CRAB NEBULA, STELLAR SPECTROPHOTOMETRY, SUPERNOVA REMNANTS, X RAY SOURCES, EMISSION SPECTRA, PROPORTIONAL COUNTERS, RADIO SPECTRA, STELLAR LUMINOSITY, SYNCHROTRON RADIATION
DOI:
10.1086/164033
Bibliographic Code:
1986ApJ...302..718W

Abstract

The three supernova remnants G 291.0-0.1 (MSH 11-62), G 308.7+0.0, and G 328.4+0.2 (MSH 15-57), which resemble the Crab Nebula in many of their radio properties, have been observed with the IPC on the Einstein X-ray observatory. Only G 291.0-0.1 was detected. This source shows very extended (>20arcmin diameter) X-ray emission, with strong central brightening. The spectral data for the bright central region are consistent with a power law of photon index α ≈ 1.8. The X-ray spectrum is considerably softer (α ≈ 3.6) in the outer parts of the object. Given the large distances and hydrogen column densities to G 308.7+0.0 and G 328.4+0.2, their X-ray limits are consistent with membership in the Crab Nebula-like group. The evolutions of radio luminosity LR, X-ray luminosity, LX, and their ratio LX/LR with remnant diameter are reassessed for this class of supernova remnant.

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