X1354-644 = GS1354-64

Details X1354-644 = GS1354-64 X1354-644 = GS1354-64

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997stin...9919567h&link_type=abstract

International Astronomical Union

Astronomy and Astrophysics

Astronomy

X Rays, Spectra, Gamma Ray Bursts, Data Acquisition, Observation, Ginga Satellite, Position (Location), Gamma Ray Observatory

Scientific paper

This X-ray transient (cf. IAUC 6772; Kitamoto et al. 1990, Ap.J. 361, 590) is being detected in hard x-rays with emission up to 200 keV - the outburst being first visible to BATSE around Oct. 29 at a level of 60 mCrab (20-100 keV where R remained until Nov. 7. More recent data indicate that the source intensity (Nov. 12-18) has increased to 160 mCrab, considerably higher than the reported 2-10 keV flux from RXTE (IAUC 6772). Its location is consistent with Ginga source GS 1354-64, Cen X-2, and MX 1353-64. Evolution from a hard spectrum (power-law index -2.1 to -2.3) to a softer one (index -2.7) occurred between early November and Nov. 18, possibly with a cutoff above 100 keV.

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