LMC X-1, X-2, and X-3 - Precise positions from the HEAO 1 modulation collimator

Abstract

view Abstract Citations (17) References (40) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS LMC X-1, X-2, and X-3: precise positions from the HEAO 1 modulation collimator. Johnston, M. D. ; Bradt, H. V. ; Doxsey, R. E. ; Gursky, H. ; Schwartz, D. A. ; Schwarz, J. ; van Paradijs, J. Abstract Precise (to about 20 arcsec) positions are reported for the Large Magellanic Cloud X-ray sources LMC X-1, X-2, and X-3, determined with the HEAO 1 scanning modulation collimator. The error regions for LMC X-1 and X-3 contain, respectively, the B5 supergiant R148 and a possibly variable B III-IV star. Spectra taken of the latter confirm the spectral type and show that it is a member of the LMC. A search for a previously reported extended component of LMC X-1 yields upper limits which exclude it. Publication: The Astrophysical Journal Pub Date: October 1978 DOI: 10.1086/182793 Bibcode: 1978ApJ...225L..59J Keywords: Magellanic Clouds; Position Errors; Satellite-Borne Instruments; Spaceborne Astronomy; X Ray Sources; Collimators; Heao 1; Nebulae; Supergiant Stars; X Ray Spectra; Astronomy; Magellanic Clouds:X-Ray Sources; Positions:X-Ray Sources full text sources ADS | data products NED (4) SIMBAD (3)