LEDAS 
Leicester Database and Archive Service
What's New
Contact Details
Getting Help
Overview
LEDAS
    User Guide
NAM Poster 2004
LEDAS Personnel
Other Database
    Sites
Local Links
Acknowledge
    LEDAS
Line
Footer
E-mail
Downtime expected shortly as all LEDAS services are moved to a new server.
next up previous contents
Next: Archive contents and data Up: The ROSAT Data Archive Previous: The ROSAT Data Archive

Background to ROSAT

ROSAT's payload consisted of two co-aligned telescopes, the German X-ray Telescope (XRT) and the UK Wide Field Camera (WFC). At any one time one of two detectors was moved into the focus of the XRT; the German Position Sensitive Proportional Counter (PSPC) or the US High Resolution Imager (HRI). The PSPC operated over the energy range 0.1 to 2.4 keV and had a moderate energy resolution of 43% at 0.93 keV and an on-axis spatial resolution of ~25 arcsec (FWHM). The HRI had a spatial resolution of ~1.7 arcsecs (FWHM) and a very limited energy resolution sufficient to provide crude information on hardness ratios. The field of view of the XRT was 2 degrees in diameter. The WFC operated over the energy range 20 to 210 eV, had a field of view of 5 degrees in diameter and a spatial resolution of 2.3 arcminutes (HEW). Spectral information was provided by six filters.

Following the completion of an all-sky survey, ROSAT carried out a pointed observation programme in which both telescopes made detailed observations of individual celestial targets. This phase of the mission started in February 1991 and continued for the rest of the operational life of the satellite. The bulk of these observations now reside in the public archive.



 
HOME
SEARCH
SERVICES INFO SOFTWARE ViZieR BLASTA DSS
ARCHIVES ASCA CHANDRA GINGA ROSAT ARNIE