Accurate position for the globular cluster X-ray source M15 - 211/X2127 + 119

Details Accurate position for the globular cluster X-ray source M15 - 211/X2127 + 119 Accurate position for the globular cluster X-ray source M15 - 211/X2127 + 119

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...209..423g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 209, no. 1-2, Jan. 1989, p. 423-426.

Astronomy and Astrophysics

Astrophysics

10

Astrometry, Globular Clusters, X Ray Sources, Astronomical Catalogs, Charge Coupled Devices, Heao 2, Image Tubes, Photographic Plates

Scientific paper

Two new and improved determinations of the position of the globular cluster X-ray source X2127+119/M15:AC211 are presented. The positions were determined using long focus exposures on CCD frames and photographic and image tube plates. Stars from the SAO and AGK 3 catalogues were taken to derive positions of faint reference stars in the surroundings of the X-ray source. The uncertainty of the best position (in the AGK 3 system) is 0.20 arcsec in alpha and delta. The nominal separation of the optical position and the X-ray position is found to be 2 arcsec, but with an uncertainty of about 1.5 arcsec from the Einstein determination.

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