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Identification of the variable X-ray sources GX 339-4 and MXB 1659-29 by the scanning modulation collimator on HEAO 1
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1979
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X-ray SpectroscopyEngineeringX-ray ImagingTerrestrial Gamma-ray FlashesHeao 1X-ray TechnologyAstronomical Image AnalysisRadiologyHealth SciencesModulation CollimatorCosmic RayRadio TelescopeSynchrotron RadiationSpace WeatherPrecise Celestial PositionsAstrophysicsIi Lambda4686X-ray DiffractionX-ray Optic
Precise celestial positions have been obtained with the HEAO 1 scanning modulation collimators for the highly variable X-ray source GX 339--4 (4U 1658--48) and the X-ray burst source MXB 1659--29. Both sources are identified with faint (17-18 mag) blue objects with He II lambda4686 and lambdalambda4640--50 emission.