Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pasj...44..641a&link_type=abstract
PASJ: Publications of the Astronomical Society of Japan (ISSN 0004-6264), vol. 44, no. 6, p. 641-647.
Astronomy and Astrophysics
Astronomy
21
Accretion Disks, Power Spectra, Pulsars, X Ray Sources, Proportional Counters, Transient Response
Scientific paper
We detected an X-ray outburst in the Vela-Puppis region with the All Sky Monitor (ASM) aboard Ginga on November 22, 1990. Following observations by the Large Area proportional Counter (LAC) revealed that this outburst consisted of two transient sources, GS 0834-430 and GS 0836-429, accidentally in the same field of view of the LAC by a separation of only 0.4 degree. These two transient X-ray sources were subsequently monitored with the LAC until 1991 May. GS 0834-430 was identified by an X-ray pulsar with a period of 12.3 s. This pulsar shows a power-law energy spectrum with a photon index of about 0.9, and with a high-energy cutoff that is typical of X-ray pulsars. GS 0836-429 was identified by an X-ray burster, which shows typical type-I bursts approximately every 2 h.
Aoki Takashi
Dotani Tadayasu
Ebisawa Ken
Itoh Masayuki
Kitamoto Shunji
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