The X-ray pulsars 4U 1145-61 and 1E 1145.1-6141

Details The X-ray pulsars 4U 1145-61 and 1E 1145.1-6141 The X-ray pulsars 4U 1145-61 and 1E 1145.1-6141

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239..655w&link_type=abstract

Astrophysical Journal, Part 1, vol. 239, July 15, 1980, p. 655-660.

Other

33

Binary Stars, Pulsars, Stellar Spectra, X Ray Sources, Power Spectra, Pulses, Satellite Observation, Spectrum Analysis

Scientific paper

Observations of the neighboring X-ray pulsars 4U 1145-61 and 1E 1145.1-6141 obtained by OSO 8, HEAO 1 and the Einstein Observatory between 1975 and 1979 are reported. A temporal analysis of Einstein Solid State Spectrometer and Monitor Proportional Counter data, OSO 8 A and C detector data and HEAO 1 A-2(3) experiment data confirms the presence of two periodicites at 291 and 297 sec in the region, with the shorter period located within 3 arcmin of 4U 1145-61. Observations indicate the spectrum of 4U 1145-61 to obey a power law with an index of 1.5 out to at least 60 keV, with little variation with pulse phase, and a 500-eV EW iron line at 6.7 keV. The spectrum of the other source is found to be more absorbed. Similarities between the pulsars are noted, and it is suggested that they may be the result of pulsar formation in a homogeneous cloud of progenitors.

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