The 1973 X-ray outburst of 4U1145-61

Details The 1973 X-ray outburst of 4U1145-61 The 1973 X-ray outburst of 4U1145-61

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989nyasa.571..534t&link_type=abstract

(NASA, NSF, Texas Academy of Science, et al., Texas Symposium on Relativistic Astrophysics, 14th, Dallas, TX, Dec. 11-16, 1988)

Astronomy and Astrophysics

Astronomy

Power Spectra, Pulsars, X Ray Stars, Sky Surveys (Astronomy), Spectrum Analysis, Vela Satellites, X Ray Astronomy

Scientific paper

This paper describes observations of X-ray outbursts in 1973, carried out by the Vela 5B spacecraft, which indicated the presence of the transient source 4U1145-61. This source was later found to be two hard X-ray pulsars separated by about 20 arcmin. The two periods are quite similar: 292 sec for the 2S1145-619 pulsar (still known as 4U1145-61) and 297 sec for the IE1145.1-6141. The time history of the March-May 1973 X-ray outburst of 4U1145-619, as given by Vela 3-12 keV data at 56-hr intervals, is presented as well as the Fourier power spectrum of 4U1145-619 observations for April 5, 1973. The results of the outburst analyses are discussed.

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