Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26as...89..367g&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 89, no. 2, Aug. 1991, p. 367-388.
Astronomy and Astrophysics
Astrophysics
12
Late Stars, Neutron Stars, Optical Countermeasures, X Ray Binaries, Astronomical Maps, Northern Sky, X-Rays: Binaries, Stars: Late-Type, X-Ray: Bursts, Stars: Neutron, Optical Surveys, Atlases
Scientific paper
We present the first part of an atlas of optical counterparts of low mass X-ray binaries. It comprises those sources that can be observed from a site at moderate northern latitudes. The declination threshold is δ > - 22° 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 19 identified and 9 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 source positions and error radii are quoted. Some of them have not been published before or were not reported in the context of optical identifications. The maps of the atlas were obtained with a CCD 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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