The X-ray Spectrum of the Rapid Burster using the Chandra HETGS

Details The X-ray Spectrum of the Rapid Burster using the Chandra HETGS The X-ray Spectrum of the Rapid Burster using the Chandra HETGS

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.2703m&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #27.03; Bulletin of the American Astronomical Society, Vol. 33, p.823

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We present observations of the Rapid Burster (RB, also known as MXB 1730-335) using the Chandra High Energy Transmission Grating Spectrometer. The average interval between type II (accretion) bursts was about 40 s. There was one type I (thermonuclear flash) burst and about 20 ``mini-bursts'' which are probably type II bursts whose peak flux is 10-40% of the average peak flux of the other type II bursts. The time averaged spectra of the type II bursts are well fit by a blackbody with a temperature of kT = 1.6 keV, a radius of 8.9 km for a distance of 8.6 kpc, and an interstellar column density of 1.7 x 1022 cm-2. No narrow emission or absorption lines were clearly detected. The 3 σ upper limits to the equivalent widths of any features are < 10 eV in the 1.1-7.0 keV band and as small as 1.5 eV near 1.7 keV. We suggest that Comptonization destroys absorption features such as the resonance line of Fe XXVI.

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