Ariel V RMC observations of the galactic centre.
Abstract
Two techniques are briefly described which were developed for summing rotation modulation collimator (RMC) data over many orbits of the Ariel 5 spacecraft by using transformations to allow for changes in spacecraft attitude. Results are presented which were obtained by applying these techniques for the region in the immediate vicinity (within about 2 deg) of the Galactic Center. It is shown that the X-ray emission from this region is usually dominated by the highly variable source A1742-294, that two other sources in this region were observed in the RMC data at a significant level, and that an upper limit of 0.6 RMC count/sec may be placed on the average intensity of two Galactic Center sources not detected by the RMC. An upper limit of 2 x 10 to the 36th erg/s is placed on the 2-10-keV emission from the nucleus.
- Publication:
-
X-ray Astronomy
- Pub Date:
- 1979
- Bibcode:
- 1979xras.proc..233E
- Keywords:
-
- Ariel 5 Satellite;
- Collimators;
- Galactic Nuclei;
- Satellite-Borne Instruments;
- Spaceborne Astronomy;
- X Ray Sources;
- Astronomical Maps;
- Galactic Structure;
- Optical Measurement;
- X Ray Astronomy;
- Astronomy;
- Galactic Center:X-Ray Sources