4 papers · 1 filter
ROSAC: Studying the clustering properties of X-ray selected AGNs
F. Tesch, F. J. Carrera, D. Engels +6
We present the first ROSAC results of an AGN clustering analysis. This study comprises a sample of 200 AGNs, 75% of which being at low redshifts z<0.5, in the Ursa Major constellat…
BeppoSAX broad-band observations of Gamma Cassiopeiae
A. Owens, T. Oosterbroek, A. N. Parmar +3
We report broad-band X-ray measurements of the Be star Gamma Cassiopeiae by the BeppoSAX X-ray astronomy satellite. The observations took place on 1998 July, 18-23. The 0.1-200 keV…
X-ray emission, optical nebulosity and dust in early-type galaxies. I. The dusty nebular filaments in NGC 5846
Paul Goudfrooij, Ginevra Trinchieri
We present new optical imagery of the X-ray bright elliptical galaxy NGC 5846, the dominant galaxy of a small group of galaxies. A dust lane with a dust mass of 7 10^3 Msun is dete…
The ROSAT Deep Survey II. Optical identification, photomettry and spectra of sources in the Lockman field
Maarten Schmidt, Guenther Hasinger, James Gunn +7
The ROSAT Deep Survey includes a complete sample of 50 X-ray sources with fluxes in the keV band larger than 5.5 erg cm s in the Lockman field (H…