9 papers
RX J0537.7-7034: The shortest-period supersoft X-ray source
J. Greiner, M. Orio, R. Schwarz
We present new photometric and spectroscopic observations of the transient supersoft X-ray source RX J0537.7-7034 and find a periodicity of approximately 3.5 hrs. This establishes…
Search for GRB X-ray afterglows in the ROSAT all-sky survey
J. Greiner, D. H. Hartmann, W. Voges +3
We describe a search for X-ray afterglows from gamma-ray bursts using the ROSAT all-sky survey (RASS) data. If the emission in the soft X-ray band is significantly less beamed than…
Zeeman lines and a single cyclotron line in the low-accretion rate polar 1RXS J012851.9-233931 (RBS0206)
A. D. Schwope, R. Schwarz, J. Greiner
We present a low-resolution discovery spectrum and CCD-photometry of the bright X-ray source 1RXS J012851.9-233931 found in the ROSAT All-Sky Survey. These first observations sugge…
The isolated neutron star candidate RBS1223 (1RXS J130848.6+212708)
A. D. Schwope, G. Hasinger, R. Schwarz +2
In the ROSAT Bright Survey (RBS) we have almost completely optically identified the brightest ~2000 high-galactic latitude sources from the ROSAT All-Sky Survey Bright Source Catal…
Tomography of Polars
Axel D. Schwope, Robert Schwarz, Andreas Staude +3
We are reviewing the power of Doppler tomography for detailed investigations of polars (magnetic cataclysmic binaries without accretion disk). Using high-resolution spectroscopy in…
Filling up the period gap: RX J0803.4-4748, a new 137 minute polar
Robert Schwarz, Jochen Greiner
We report the discovery of a new AM Herculis system as the counterpart of the bright and very soft X-ray source RX J0803.4-4748 found serendipitously in a ROSAT PSPC pointing. Opti…