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4 papers · 1 filter
The evolution of ultraviolet emission lines from the circumstellar material surrounding SN 1987A
G. Sonneborn, C. Fransson, P. Lundqvist +5
The presence of narrow high-temperature emission lines from nitrogen-rich gas close to SN 1987A has been the principal observational constraint on the evolu- tionary status of the…
ROSAT Soft X-Ray Properties of the Large Bright Quasar Survey: Modeling of Stacked X-Ray Spectra
Norbert Schartel, Paul J. Green, Scott F. Anderson +6
We develop and apply a novel method of analysis to study the X-ray spectral properties of 908 QSOs in the Large Bright Quasar Survey (LBQS) that were observed during the soft X-ray…
Environmental effects on the Coma cluster luminosity function
C. Lobo, A. Biviano, F. Durret +4
Using our catalogue of V isophotal magnitudes for 6756 galaxies in a region covering 60~~25~arcmin in the center of the Coma cluster, plus 267 galaxies in a re…
Soft X-ray properties of a complete sample of radio sources
J. Siebert, W. Brinkmann, R. Morganti +4
We present the soft X-ray (0.1--2.4 keV) properties of a complete sample of 88 southern radio sources derived from the Wall \& Peacock 2-Jy sample. It comprises 68 radio galaxies,…