GRO J2058+42 Observations with BATSE and RXTE

Wilson, Colleen A.; Finger, Mark H.; Scott, D. Matthew
April 2000
AIP Conference Proceedings;2000, Vol. 510 Issue 1, p208
Academic Journal
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. © 2000 American Institute of Physics.


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