New Transient X-Ray Source in the Scutum Region Discovered with ASCA

Details New Transient X-Ray Source in the Scutum Region Discovered with ASCA New Transient X-Ray Source in the Scutum Region Discovered with ASCA

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasj...47..189y&link_type=abstract

Publications of the Astronomical Society of Japan, v.47, p.189-194.

Astronomy and Astrophysics

Astronomy

20

Stars: Individual (Ax 18450-0433), X-Rays: Sources, X-Rays: Spectra, X-Rays: Transient

Scientific paper

Using the ASCA satellite we have discovered a new transient X-ray source at the position of RA(2000) = 18() h45() m2() s, Dec(2000) = -4(deg) 33'31'' (uncertainty = 1'), designated as AX 1845.0-0433. The N_H-corrected X-ray flux was ~ 3times 10(-12) erg s(-1) cm(-2) in the 0.7--10 keV region at the beginning of the observation; the X-ray source then suddenly flared up to a level of about 1times 10(-9) erg s(-1) cm(-2) in the 0.7--10 keV region after N_H-correction within less than a few hours. It exhibited flare-like activity on the minimum time scale of a few ten minutes; the activity lasted until the end of the observation. The X-ray spectra in the quiescent and flare states resemble those of binary X-ray pulsars. However, no coherent pulsation was found in the range from 125 ms to 4096 s.

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