We have identified the ROSAT source RX J0039.2-5117 with the previously almost unknown 'narrow line' Seyfert 1 galaxy WPVS007 (z = 0:028). The X-ray source displays quite unusual properties for an AGN. It was bright and ultrasoft in the ROSAT All-Sky Survey (RASS) and found at a level lower by a factor of 400 in PSPC count rate in 1993. The implied 0:1 2:4 keV luminosity during the RASS was 10 ...

We have developed an algorithm to nd variable sources in X-ray data. This algorithm is designed for use as a rst-look analysis of the data to nd regions of interest which may then be analyzed in detail by other means. We detect thesèinteresting' regions in the data by rst estimating the expected counts in each pixel, and then comparing it to the actual number of counts observed. We show the res...

We present the results of a deep ROSAT HRI observation of the supernova remnant Kes 32 and the possibly associated pulsar PSR B1610-50. The supernova remnant shows strongly energy dependent complex structures in a comparison with the ASCA GIS and ROSAT PSPC data with low foreground absorption (NH ∼ 5 × 1021 cm−2). The pulsar is not seen in the HRI image indicating a high absorbing column densit...

We present a catalogue of 107 point-like X–ray sources derived from a systematic analysis of all the ROSAT PSPC observations of the galactic center region performed in 1992–1993. Besides SgrA*, the massive black hole at the galactic center, 41 X–ray sources have been positionally associated with already classified objects. Twenty are identified with foreground stars and five with known Low Mass...

We report the detection of luminous extended X-ray emission in NGC 6240 on the basis of ROSAT HRI observations of this ultraluminous IR galaxy. The spatial structure and temporal behavior of the X-ray source were analyzed. We find that >∼ 70% of the soft X-ray emission is extended beyond a radius of 5. Strong emission can be traced out to a radius of 20 and weaker emission extends out to ∼50. W...