X-rays from supernovae remnants 3C400.2 (= G53.7 - 2.2) and MSH 15 - 56

Astronomy and Astrophysics – Astrophysics

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Supernova Remnants, X Ray Sources, Chronology, Flux (Rate)

Scientific paper

Detection of two new soft X-ray sources and their identification with the supernova remnants (SNRs) 3C 400.2 and MSH 15-56, is reported. From the observed X-ray flux in the 0.7-2.0 keV energy range, the X-ray luminosity of 3C 400.2 is derived to be in the range of (2.7-5.3)×1035 ergs s-1 and that of MSH 15-56 in the range of (0.9-1.6)×1035 ergs s-1. If the standard adiabatic shockwave model for the SNRs is used, an age of ≡(1.4-3.2)×104 yr is derived for 3C 400.2 whereas MSH 15-56 is found to be younger of an age of (5-10)×103 yr.

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