A Deep ROSAT Observation of the Highly Variable AGN / Active Galactic Nuclei 1E:1403+5439
Abstract
A long (33600 s) Rosat Position Sensitive Proportional Counter observation of the galaxy M101 was performed. The field includes the serendipitous Einstein source 1E1403 + 5439, which was previously observed to vary by a factor 5.5 in 160 days. Despite the higher sensitivity of the Rosat PSPC and the high exposure time, the source could not be detected down to a much lower flux limit than the lowest Einstein detection. The unusually high variability and the proximity (18 feet) to M101 make this source a good candidate for gravitational microlensing.
- Publication:
-
X-ray Emission from Active Galactic Nuclei and the Cosmic X-ray Background
- Pub Date:
- March 1992
- Bibcode:
- 1992xrea.conf..187B
- Keywords:
-
- Active Galactic Nuclei;
- Proportional Counters;
- Rosat Mission;
- Heao 2;
- Radiant Flux Density;
- Variability;
- X Ray Astronomy;
- Astronomy