View Full Version : High Energy Burst in Galaxy far, far away

2011-Apr-19, 05:14 PM

An extremely luminous panchromatic outburst from the nucleus of a distant galaxy

Here we present multiwavelength observations of a unique gamma-ray selected transient, discovered by Swift, which was accompanied by bright emission across the electromagnetic spectrum, and whose properties are unlike any previously observed source. We pinpoint the event to the center of a small, star-forming galaxy at redshift z=0.3534. Its high-energy emission has lasted much longer than any gamma-ray burst, while its peak luminosity was about 100 times higher than the brightest active galactic nuclei...

The association of the outburst with the center of its host galaxy suggests that this phenomenon has its origin in a new, rare mechanism associated with a massive black hole in the nucleus of a galaxy.

And from the body of the paper:

While these numbers are not abnormal for long-duration GRBs, the properties of this outburst are clearly distinct from the long-GRB population. First, the repetition of the X-ray trigger 4 times in 48 hours is unheard of for long-GRBs, which are destructive, and non-repeating events. Further, the duration of bright X-ray emission is
much longer than has ever been seen for any long-GRB persisting at LX ~ 1047 erg s^-1 two weeks after the initial event...The overall energetics and long-duration, together with the order-of-magnitude variations in flux over 100 s timescales, make it clear that we are observing a new and unprecedented astrophysical object

Simply Unbelievable.

2011-Apr-20, 10:32 AM
Anyone interested in this might want to look at this thread for more info (if they haven't already seen it): http://www.bautforum.com/showthread.php/114146-GRB-110328A