INTEGRAL/JEM-X detects a new outburst of the Rapid Burster (MXB 1730-335)

Open Access
Authors
  • J. Chevenez
  • E. Kuulkers
  • J. Alfonso-Garzon
  • V. Beckmann
  • T. Bird
  • S. Brandt
  • M. Del Santo
  • A. Domingo
  • K. Ebisawa
  • P. Jonker
  • P. Kretschmar
  • C. Markwardt
  • T. Oosterbroek
  • A. Paizis
  • K. Pottschmidt
  • C. Sanchez-Fernández
  • R. Wijnands
Publication date 2013
Journal The astronomer's telegram
Volume | Issue number 4848
Organisations
  • Faculty of Science (FNWI) - Anton Pannekoek Institute for Astronomy (API)
Abstract
The neutron star X-ray transient MXB 1730-335, aka the Rapid Burster, has been detected in outburst by the JEM-X monitors onboard INTEGRAL during the Galactic Bulge monitoring (see ATel #438) observation performed on February 28th, 2013, between (UT) 14:28 and 18:10. It is detected at 25 σ in the combined JEM-X mosaic with an effective exposure time of 2 ksec, and the measured fluxes are the following:
170 ±6 mCrab (2.9e-9 erg/cm2/s) in the 3-10 keV energy band,
122 ±13 mCrab (1.5e-9 erg/cm2/s) in the 10-25 keV energy band.
The source is not visible in the IBIS/ISGRI camera with flux upper limits (6 σ) of ~3 mCrab (2.9e-11 erg/cm2/s) in the 18-40 keV band, and ~10 mCrab (1.0e-10 erg/cm2/s) in the 40-100 keV band.

No bursting activity is noticeable.

During the previous observation of the Galactic Bulge on February 24th (see ATel #4840) the source was not detected with 5 σ upper limits of 8 mCrab (1.1e-10 erg/cm2/s) and 5 mCrab (5e-11 erg/cm2/s) in the 3-10 keV and 10-25 keV bands, respectively.
Document type Article
Language English
Published at http://www.astronomerstelegram.org/?read=4848
Downloads
INTEGRAL_JEM-X.pdf (Final published version)
Permalink to this page
Back