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The EXOSAT High Galactic Latitude Survey

Published online by Cambridge University Press:  19 July 2016

P. Giommi  and
G. Tagliaferri
P. Giommi
Affiliation:
EXOSAT Observatory, ESOC Robert Bosch Str. 5, 6100 Darmstadt, West Germany
G. Tagliaferri
Affiliation:
EXOSAT Observatory, ESOC Robert Bosch Str. 5, 6100 Darmstadt, West Germany

Abstract

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We have performed a survey of ∼570 square degrees of high galactic latitude sky using a large number of EXOSAT X-ray images. 130 serendipitous sources were detected and ∼60% of them have been identified with catalogued objects. The large majority of the remaining sources have faint optical counterparts on POSS or ESO plates and are expected to be extragalactic. The comparison of our results with those of the Einstein Medium Sensitivity Survey and an analysis of the correlation between the spatial distribution of EXOSAT serendipitous sources and the amount of galactic Hydrogen column density indicate that the average spectral index of extragalactic X-ray sources is steeper than the canonical AGN slope.

Type
Chapter X: The Distribution of X-Ray Sources and the X-Ray Background
Information
Symposium - International Astronomical Union , Volume 124: Observational Cosmology , 1987 , pp. 601 - 605
Copyright
Copyright © Reidel 1987 

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