GRO J2058+42 Observations with BATSE and RXTE

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Pulsars, X-Ray Binaries, X-Ray

Scientific paper

GRO J2058+42 is a 196-second pulsar discovered with the Burst and Transient Source Experiment (BATSE) on the Compton Gamma-Ray Observatory (CGRO) during a giant outburst in 1995. It underwent a series of 9 weaker outbursts from 1995 to 1997 that alternated in peak pulsed intensity, with a 110-day cycle in the 20-50 keV band [4]. These outbursts did not show the same intensity variations in the 2-10 keV observations with the Rossi X-ray Timing Explorer's (RXTE) All-Sky Monitor (ASM) [2]. Additional outbursts after this series were observed with BATSE and with the RXTE Proportional Counter Array (PCA) and ASM [3]. These outbursts do not appear to continue the alternating peak pulsed intensity pattern seen with BATSE in the first 9 outbursts. Histories of pulse frequency, pulsed flux, and total flux are presented. Pulse profiles and spectra from PCA observations are also presented. .

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