View Full Version : Closest gamma-ray burst

2004-Aug-05, 04:26 PM
ESA's Integral detects closest cosmic gamma-ray burst (http://www.spaceref.com/news/viewpr.html?pid=14759)

A gamma-ray burst detected by ESA's Integral gamma-ray observatory on 3 December 2003 has been thoroughly studied for months by an armada of space and ground-based observatories. Astronomers have now concluded that this event, called GRB 031203, is the closest cosmic gamma-ray burst on record, but also the faintest. This also suggests that an entire population of sub-energetic gamma-ray bursts has so far gone unnoticed...

2004-Aug-05, 04:52 PM
Different angle on the same news item:

Weak gamma ray bursts may be common (http://www.newscientist.com/news/news.jsp?id=ns99996243&lpos=home5)

Not all gamma-ray bursts - colossal blasts of energy that are thought to spew out when the core of a massive star collapses - are as energetic as astronomers thought, suggests new research.

Two teams have now seen one that was much weaker than expected, and think that such half-hearted bursts may even be more numerous than their full-blooded counterparts.

Manchurian Taikonaut
2005-Jan-20, 09:26 PM
more Integral info

The High-Mass X-ray Binary V 0332+53 (EXO 0331+530), currently undergoing a dramatic outburst was a Target of Opportunity (TOO) for an INTEGRAL observation on 6-10 January 2005. The source was observed as soon as allowed by visibility constraints on 6 January in staring mode and then in the hexagonal dithering mode for a total of about 110 ksec.

The current outburst reaches a flux of about 1 Crab in the X-rays (3-10 keV). The V 0332+53 flux increased steadily between the end of November 2004 and New Year 2005