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Title:
Two X-ray supernova remnants - G296.1 - 0.7 and 1E 1149.4 - 6209
Authors:
Markert, T. H.; Lamb, R. C.; Hartman, R. C.; Thompson, D. J.; Bignami, G. F.
Affiliation:
AA(MIT, Cambridge, MA)
Publication:
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 248, Aug. 15, 1981, p. L17-L21. (ApJL Homepage)
Publication Date:
08/1981
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
GALACTIC EVOLUTION, RADIO SOURCES (ASTRONOMY), SUPERNOVA REMNANTS, X RAY SOURCES, ASTRONOMICAL MAPS, FOURIER TRANSFORMATION, NEBULAE
Comment:
A&AA ID. AAA030.125.008
DOI:
10.1086/183614
Bibliographic Code:
1981ApJ...248L..17M

Abstract

Using the imaging X-ray detectors on the Einstein Observatory, what appear to be two overlapping galactic supernova remnants are discovered, one of which is clearly identified with the previously cataloged radio remnant G296.1-0.7. The other feature has no radio or optical counterpart. It is a nearly complete ring with a diameter of 20-25 arcmin, designated 1E 1149.4-6209. Because of its morphology, because there is evidence for supernova events in the vicinity, and because there seems to be no plausible alternative, 1E 1149.4-6209 is classified as a supernova remnant. This remnant and others like it, which may be found first in X-rays rather than radio or optical waves, may have important implications regarding the evolution of supernova remnants and the rate of supernovae in our Galaxy.

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