view Abstract Citations (34) References (31) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Position and pulse profile of the X-ray transient 4U 0115+63. Johnston, M. ; Bradt, H. ; Doxsey, R. ; Gursky, H. ; Schwartz, D. ; Schwarz, J. Abstract The celestial position of the 3.6-s X-ray pulsar, 4U 0115 + 63, has been measured to a precision of 12 arcsec in one dimension with the scanning modulation collimator experiment on HEAO 1. This result, together with a position obtained with SAS 3, has led to the identification of an early-type star as the optical counterpart. An X-ray luminosity of approximately 3 by 10 to the 37th power erg/s (3-13 keV) is inferred from the observed flux of about 30% that of the Crab and an estimated distance of 5 kpc. The pulse profile over the energy range 3-13 keV is similar to that of Cen X-3. Publication: The Astrophysical Journal Pub Date: July 1978 DOI: 10.1086/182731 Bibcode: 1978ApJ...223L..71J Keywords: Early Stars; Position (Location); Pulsars; X Ray Sources; Collimators; Galactic Radiation; Luminous Intensity; Satellite Observation; Spaceborne Astronomy; Astronomy; Positions:X-Ray Pulsars; X-Ray Sources: Transient full text sources ADS | data products SIMBAD (5)