Timing analysis of the event in time bins of 400 seconds reveals a structured lightcurve starting on March 2, 2007 at about 13:30 UT, reaching a maximum after an hour and fading over 0.5 to 1 hour. The exact duration of the outburst is unknown due to a half-hour telemetry loss at the end of the event. The maximum flux reached is of about 330 mCrab in the 20-40 keV band and 250 mCrab in the 40-80 keV band. There was no other strong activity of the source within several hours before and after the outburst.
We extracted a spectrum of the source in the science window lasting 2741 seconds during which the source was the brightest. The resulting spectrum in the 20-100 keV range (the outburst occurred outside the JEM-X field of view) can be satisfactorily fitted by either a thermal bremmstrahlung model or a cut-off powerlaw, but not by a single powerlaw or a blackbody model. The best bremmstrahlung model fit has a temperature of kT = 22.5 +/- 1.3 keV.
|Publication date||3 Mar 2007|
|Publication status||Published - 3 Mar 2007|
|Series||The Astronomer's telegram|
- Gamma Ray
- Neutron Star