Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9210723g&link_type=abstract
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Astronomy and Astrophysics
Astronomy
Astronomical Catalogs, Astronomical Maps, Exosat Satellite, Mapping, Radiation Sources, X Ray Binaries, Black Holes (Astronomy), Charge Coupled Devices, Companion Stars, Northern Sky, Optical Countermeasures, Optical Measurement, Telescopes, X Ray Sources, X Rays
Scientific paper
The first part of an atlas of optical counterparts of low mass X ray binaries is presented. It comprises those sources that can be observed from a site at moderate northern latitudes. The declination threshold is delta greater than -22 degrees so that the sample of low mass X ray binaries is referred to as the northern sample. In total this part of the atlas includes 18 identified and 10 unidentified objects. The latter define the list of bright X ray sources being possible low mass binary candidates but lacking any obvious optical counterpart. The information presented in this atlas is compiled from various papers from the past two decades. Where appropriate, the most recent X ray source positions and error radii are quoted. Some of them have not been published before or were not reported in the context of optical identification. The maps of the atlas were obtained with a charge coupled device camera at the focus of the 1.23 m, the 2.2 m and the 3.5 m telescope at the German-Spanish astronomical Center/Calar alto, as uniformly as possible, for the complete northern sample.
Gottwald Manfred
Graser Uwe
Pietsch Wolfgang
Steinle Helmut
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