The MIT/OSO 7 catalog of X-ray sources: intensities, spectra, and long-term variability.
Abstract
This paper is a summary of the observations of the cosmic X-ray sky performed by the MIT 1-40-keV X-ray detectors on OSO 7 between October 1971 and May 1973. Specifically, mean intensities or upper limits of all third Uhuru or OSO 7 cataloged sources (185 sources) in the 3-10-keV range are computed. For those sources for which a statistically significant (greater than 20) intensity was found in the 3-10-keV band (138 sources), further intensity determinations were made in the 1-15-keV, 1-6-keV, and 15-40-keV energy bands. Graphs and other simple techniques are provided to aid the user in converting the observed counting rates to convenient units and in determining spectral parameters. Long-term light curves (counting rates in one or more energy bands as a function of time) are plotted for 86 of the brighter sources.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- April 1979
- DOI:
- 10.1086/190587
- Bibcode:
- 1979ApJS...39..573M
- Keywords:
-
- Astronomical Catalogs;
- Oso-7;
- Satellite Observation;
- X Ray Astronomy;
- Graphs (Charts);
- Light Curve;
- Long Term Effects;
- Spaceborne Astronomy;
- Spectral Bands;
- Tables (Data);
- Astronomy;
- Catalogues:X-Ray Sources;
- Spectra:X-Ray Sources;
- X-Ray Sources:Variations