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Positions and identifications for galactic X-ray sources 2A1822-371 and 2S1254-690Precise positions and optical identifications for the galactic X-ray sources 2A1822-371 (4U 1822-37) and 2S 1254-690 (4U 1254-69) were obtained by used of a described scanning modulation collimator on HEAO 1 and are reported. Neither is thought to be substantially reddened since both show strong ultraviolet excesses and are located at a relatively high galactic latitude. The distance of 4U 1254-69 is estimated to be approximately 10 kpc.
Document ID
19790030259
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1038/276247a0
Authors
Griffiths, R. E. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Gursky, H. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Schwartz, D. A. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Schwarz, J. (Harvard College Observatory and Smithsonian Astrophysical Observatory, Center for Astrophysics, Cambridge Mass., United States)
Bradt, H. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Doxsey, R. E. (MIT Cambridge, Mass., United States)
Charles, P. A. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Thorstensen, J. R. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Date Acquired
August 9, 2013
Publication Date
November 16, 1978
Publication Information
Publication: Nature
Volume: 276
Subject Category
Astrophysics
Accession Number
79A14272
Funding Number(s)
CONTRACT_GRANT: NSF AST-78-06873
CONTRACT_GRANT: NAS8-30453
CONTRACT_GRANT: NAS8-27972
Distribution Limits
Public
Copyright
Other

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