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The X-ray background and the ROSAT Deep Surveys
Guenther Hasinger, Gianni Zamorani
In this article we review the measurements and understanding of the X-ray background (XRB), discovered by Giacconi and collaborators 35 years ago. We start from the early history a…
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…
The ROSAT Deep Survey I. X-ray sources in the Lockman Field
Guenther Hasinger, Richard Burg, Riccardo Giacconi +3
The ROSAT Deep Survey in the Lockman Hole is the most sensitive X-ray survey performed to date, encompassing an exposure time of 207 ksec with the PSPC and a total of 1.32 Msec wit…
RX J2115.7-5840: a short-period, asynchronous polar
A. D. Schwope, D. A. H. Buckley, D. O'Donoghue +3
We report phase-resolved optical polarimetric, photometric and spectroscopic observations of RX J2115.7-5840 (= EUVE J2115-58.6, Craig 1996) which confirms the system to be a magne…