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The nucleus of M 82 at radio and X-ray bands : discovery of a new radio population of supernova candidates.

Kronberg, P. P.; Biermann, P.; Schwab, F. R.

Detailed VLA radio maps are presented of the continuum radio emission in M82 and the X-ray emission from the HRI of the Einstein X-ray satellite. The authors have discovered more than 40 new radio sources within 300 pc of M82's nucleus. It is argued that nearly all of these sources are radio supernovae or supernova remnants and their radio luminos…

The discovery of 4.4 second X-ray pulsations from the rapidly variable X-ray transient V 0332+53.

Stella, L.; Parmar, A. N.; White, N. E. +3 more

Using the EXOSAT Observatory, three outbursts from the transient X-ray source V0332 + 53 have been observed between November 1983 and January 1984. It is found that in addition to the rapid Cyg X-1-like variability previously reported by Tanaka et al. (1983), this source also displays stable pulsations with a period of 4.4 s. Doppler variations in…

EXOSAT observations of broad iron K line emission from Scorpius X-1.

White, N. E.; Taylor, B. G.; Peacock, A.

Using the Exosat Gas Scintillation Proportional Counter a broad iron K emission line is found to be present in the X-ray spectrum of Sco X-1. The line full width half-maximum (FWHM) is 0.7 keV, independent of the source intensity state. During flaring intervals the line intensity remains constant such that the equivalent width, decreases from 50 e…

The X-ray spectrum of the supernova remnant W 49B from EXOSAT.

Jones, L. R.; Smith, A.; Pye, J. P. +1 more

X-ray observations of the supernova remnant W49B made by the medium-energy detector and gas scintillation propotional counter experiments on board Exosat are presented. The detection of a very strong emission line feature at 6.7 keV indicates a thermal origin of the X-rays. Fitting the spectral data with an optically thin thermal plasma model indi…