Extra-soft X-ray excess of quasars

Details Extra-soft X-ray excess of quasars Extra-soft X-ray excess of quasars

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990scsmp..33..720z&link_type=abstract

Science in China, Series A - Mathematics, Physics, Astronomy and Technological Sciences (ISSN 1001-6511), vol. 33, June 1990, p.

Astronomy and Astrophysics

Astronomy

Quasars, Radio Astronomy, Stellar Spectra, X Ray Spectra, Astronomical Models, Heao 2, Proportional Counters, Satellite Imagery

Scientific paper

One of the features of the quasar multiwaveband spectra is that a big bump, ranging from optical to soft X-ray, is superimposed on the nonthermal power-law spectrum. Using the low-energy X-ray spectral data of a sample consisting of 33 strong soft X-ray quasars, the spectral properties in the extra-soft X-ray band are investigated. The spectral indices were statistically analyzed, and their statistical law was obtained. This law can be used in the development of a big bump model.

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