Discovery of an unusual hard X-ray source in the region of supernova 1987A

Details Discovery of an unusual hard X-ray source in the region of supernova 1987A Discovery of an unusual hard X-ray source in the region of supernova 1987A

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.330..230d&link_type=abstract

Nature (ISSN 0028-0836), vol. 330, Nov. 19, 1987, p. 230, 231.

Astronomy and Astrophysics

Astronomy

179

Spectral Energy Distribution, Supernova 1987A, X Ray Sources, X Ray Spectra, Error Analysis, Japanese Spacecraft, Magellanic Clouds, Spaceborne Telescopes, Supernova Remnants

Scientific paper

A new hard X-ray source has been discovered near supernova 1987A from the X-ray astronomy satellite Ginga. The present error box of 0.2 x 0.3 deg includes the supernova. The energy spectrum is very hard above 10 keV and unusual for any of the known classes of X-ray source. The flux in the range 10-30 keV as of September 2-3 is about 5 x 10 to the -11th erg/sq cm s. The source intensity increased steadly throughout July, August, and early September, but an observation in late September revealed no further increase. The positional agreement, a steady brightening, and an unusual hard spectrum support the identification of the source as SN1987A.

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