A six-month X-ray survey of the Large Magellanic Cloud with the HEAO 1 scanning modulation collimator

Abstract

view Abstract Citations (49) References (71) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A six-month X-ray survey of the Large Magellanic Cloud with the HEAO 1 scanning modulation collimator. Johnston, M. D. ; Bradt, H. V. ; Doxsey, R. E. Abstract We report the results of the first six months of scanning observation of the Large Magellanic Cloud with the HEAO 1 modulation collimator. Refined positions for LMC X-1 and X-3 support previously suggested optical candidates; the position obtained for LMC X-2 has led to the discovery of a faint (B 18.5) variable blue star as its optical counterpart. Analysis of the light curves of LMC X-1, X-2, and X-3 reveals no evidence of eclipses or periodic intensity variations for periods between 0.6 and 16 days. A cross-correlation analysis of the modulation collimator data has led to the discovery of a previously unreported faint source, H0544 -665, and to upper limits on LMC X-5 and X-6. The luminosity distribution of the LMC X-ray sources is compared to that of galactic sources, and possible explanations for the systematically higher luminosity of the former are discussed. Subject headings: galaxies: Magellanic Clouds - galaxies: stellar content - stars: stellar statistics - X-rays: sources Publication: The Astrophysical Journal Pub Date: October 1979 DOI: 10.1086/157412 Bibcode: 1979ApJ...233..514J Keywords: Astrometry; Heao 1; Magellanic Clouds; Spaceborne Astronomy; X Ray Astronomy; X Ray Sources; Collimators; Cross Correlation; Light Curve; Position Errors; Statistical Distributions; Astronomy; Magellanic Clouds:X-Ray Surveys; Positions:X-Ray Sources; X-Ray Sources:Optical Counterparts full text sources ADS | data products SIMBAD (7) NED (2) Related Materials (1) Erratum: 1980ApJ...236.1056J