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Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources
Astronomy and Astrophysics Supplement Series
We describe a program for the optical identification of a representative sample of RASS sources contained in six study areas north of δ = −9 • , with |b II | > ∼ 20 • including one region near the North Galactic pole (NGP) and one near the North Ecliptic pole (NEP) and present some preliminary results. A full identification has been carried out for a count-rate and area-limited complete subsample comprising 674 sources. The ratio of "extragalactic" ( e.g. AGN, clusters of galaxies) to "stellar"doi:10.1051/aas:1997347 fatcat:i6hqpqcjnfcczh4khkqeiql7hi