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Position and pulse profile of the X-ray transient 4U 0115 + 63

DOI

20

Citations

0

References

1978

Year

M. Johnston, H. Bradt, R. Doxsey, H. Gursky, D. Schwartz, J. Schwarz
The Astrophysical Journal

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.