A ROSAT upper limit on X-ray emission from SN 1992A

Details A ROSAT upper limit on X-ray emission from SN 1992A A ROSAT upper limit on X-ray emission from SN 1992A

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...412l..29s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 412, no. 1, p. L29-L32.

Astronomy and Astrophysics

Astronomy

23

Stellar Mass Ejection, Stellar Spectra, Supernovae, X Ray Sources, Background Radiation, Rosat Mission, Sky Surveys (Astronomy)

Scientific paper

We have used the Position Sensitive Proportional Counter on ROSAT to search for X-ray emission from the Type Ia supernova 1992A in NGC 1380 about 16 days after the outburst maximum. No X-ray emission is present to a flux of about 4 x 10 exp -14 ergs/s cm, which corresponds to a 0.5-2 keV luminosity 99 percent upper limit of about 3-5 x 10 exp 38 ergs/s. This implies a presupernova mass-loss rate of less than a few x 10 exp -6 solar mass/yr. This is the most sensitive upper limit, by several orders of magnitude, yet obtained for a Type Ia supernova.

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