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The soft X-ray excess in Einstein quasar spectra
- Source :
- Astronomy and Astrophysics. 253(1 Ja)
- Publication Year :
- 1992
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1992.
-
Abstract
- An SNR-limited subsample of 14 quasars from the Wilkes and Elvis (1987) sample is presently investigated for low-energy excess above a high-energy power law in the X-ray spectra obtained by the Einstein Imaging Proportional Counter. A significant excess that is 1-6 times as strong as the high-energy component at 0.2 keV is noted in eight of the 14 objects. In the case of 3C273, multiple observations show the excess to be variable.
- Subjects :
- Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Volume :
- 253
- Issue :
- 1 Ja
- Database :
- NASA Technical Reports
- Journal :
- Astronomy and Astrophysics
- Notes :
- NAS8-30751
- Publication Type :
- Report
- Accession number :
- edsnas.19920040184
- Document Type :
- Report