Mathematics – Probability
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998ycat..41320341m&link_type=abstract
VizieR On-line Data Catalog: J/A+AS/132/341. Originally published in: 1998A&AS..132..341M
Mathematics
Probability
X-Ray Sources, Cross Identifications
Scientific paper
We report on optical searches in the error circles of 93 ROSAT survey sources located at low galactic latitudes (|b|<20°). These sources were extracted from the ROSAT Galactic Plane Survey using various selection criteria on hardness ratio, X-ray and optical brightness and integrated galactic absorption in the direction of the source. We find optical identifications in 76 cases, among which are 25 new AGN, 6 new CVs and a new Be/X-ray binary. In order to illustrate the relevance of the source selections applied here, we cross-correlated the ROSAT all-sky survey bright source list with SIMBAD. Different classes of X-ray emitters populate distinct regions of a multi dimensional parameter space involving flux ratios, galactic latitude and NH. This relatively good segregation offers the possibility to build source samples with enhanced probability of identification with a given class. Complete optical identification of such subsamples could eventually be used to compute meaningful probabilities of identification for all sources using as basis a restricted set of multi-wavelength information. (2 data files).
Guillout Patrick
Haberl Franck
Krautter Joachim
Motch Ch.
Pakull Manfred W.
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