Preliminary results on the properties of the EMSS AGN's as derived from the ROSAT all sky survey

Details Preliminary results on the properties of the EMSS AGN's as derived from the ROSAT all sky survey Preliminary results on the properties of the EMSS AGN's as derived from the ROSAT all sky survey

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992xrea.conf..216m&link_type=abstract

In its X Ray Emission from Active Galactic Nuclei and the Cosmic X Ray Background p 216-219 (SEE N93-17094 05-90)

Astronomy and Astrophysics

Astronomy

2

Active Galactic Nuclei, Radiant Flux Density, Rosat Mission, Spectrum Analysis, Heao 2, Quasars, Seyfert Galaxies, Sky Surveys (Astronomy), Spectral Energy Distribution, X Ray Astronomy

Scientific paper

Results on Einstein Medium Sensitivity Survey (EMS) Active Galactic Nuclei (AGN) for the first approximately 90 percent of the Rosat All Sky Survey (RASS) are presented. Of the 427 AGN's in the EMSS, approximately 31 percent were detected in the RASS, for another approximately 36 percent upper limits are available, while, so far, no useful information is available for the remaining 33 percent. The average photon index of the EMSS AGN's in the position sensitive proportional counter band (01.1 to 2.4 keV), as determined from the hardness ratios, is significantly steeper than the one determined from Image Proportional Counter (IPC) data on the (0.3 to 3.5 keV) band for the same set of sources. The comparison of Rosat fluxes computed from count rates in the B band (0.4 to 2.4 keV) to fluxes in the EMSS band (0.3 to 3.5 keV) together with the spectral indices analysis indicates that sources tend to be steeper when they are brighter.

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