Abstract
view Abstract Citations (49) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS SMC X-1 variability observed from HEAO 1. Gruber, D. E. ; Rothschild, R. E. Abstract Studies are reported of the slow variability of SMC X-1 and its spectrum. An analysis of red-noise random variability is based on a method discussed by Deeter and Boynton (1982). The 0.7 s X-ray pulsar SMC X-1 is in a 3.89 day eclipsing binary system with a B0 I supergiant companion. Observations of the pulsar were conducted with the aid of the UCSD/MIT instrument on HEAO 1 from 1977 August through 1979 January. A light curve was constructed for the period 1977 September to 1978 December. The apparent tendency of SMC X-1 to be in one of two states, high or low, suggests the acquisition of average spectra separately for each state. The total (steady plus pulsed) emission from SMC X-1 displays a continuum spectrum with a dominant exponential form which implies a temperature of 17 keV for thin thermal bremsstrahlung emission or 5 keV if the other limit of a Wien spectrum is assumed. Publication: The Astrophysical Journal Pub Date: August 1984 DOI: 10.1086/162338 Bibcode: 1984ApJ...283..546G Keywords: Eclipsing Binary Stars; Magellanic Clouds; Pulsars; Stellar Mass Accretion; X Ray Sources; X Ray Spectra; Accretion Disks; Heao 1; Light Curve; Periodic Variations; Random Walk; Astrophysics full text sources ADS | data products NED (2) SIMBAD (1)
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