Sentences with phrase «gamma ray burst last»

A team of astronomers using a pair of National Science Foundation radio telescopes has made the first measurements of the size and expansion of a mysterious, intense fireball resulting from a cosmic gamma ray burst last May.

Not exact matches

Researchers have found that short gamma - ray bursts — those that last a couple of seconds or less — have brighter afterglows than the simple, reigning model of afterglow emission predicts.

«Many astronomers, including our group, have already provided a great deal of evidence that long - duration gamma - ray bursts (those lasting more than two seconds) are produced by the collapse of extremely massive stars.

NASA's Swift satellite picked up the short - lived burst Thursday — gamma - ray bursts usually last just minutes, even seconds — and a suite of follow - up observations of the explosion's afterglow at telescopes around the globe enabled an age estimate.

Last year astronomers discovered evidence of another unexpectedly uniform kind of variability among gamma - ray bursts, stellar explosions that are even more luminous than Type Ia supernovas.

It was the first time scientists pinpointed a short gamma - ray burst (lasting less than a second), which probably occurs during a collision of dense neutron stars.

Swift lived up to its name on 17 January, when it detected a bright and relatively long - lasting gamma ray burst.

It sent a flood of high - energy radiation towards Earth that lasted much longer than is typical for a gamma - ray burst (GRB).

But last year, Østgaard and his colleagues discovered the previously unknown gamma ray burst while reprocessing the satellite data.

The intense radiation was part of a gamma - ray burst that lasted a minute and which marked the death of a massive star transmogrifying itself into a black hole.

Although terrestrial gamma - ray flashes typically last between 300 and 400 microseconds, the burst observed by the satellite sensors in 2006 lasted a mere 70 microseconds, the researchers report online and in a forthcoming issue of Geophysical Research Letters.

Short gamma - ray bursts are cousin to long gamma - ray bursts, which are displays of enormous amounts of energy that last for more than two seconds and briefly outshine other energy sources before fading.

On March 31, 2011, scientists submitted a revised paper describing how they used a supercomputer to model the formation of short gamma - ray bursts (GRBs) that have been detected as lasting less than two seconds.

The formation of short gamma - ray bursts lasting less than two seconds from a meger between two neutron stars to create a black hole has been modelled with a supercomputer (more).

The brief gamma - ray burst — lasting less than two seconds and of a type known as a «short» gamma - ray burst — occurred more than 10 times closer to Earth than any other whose distance was known, but was unexpectedly weak; the ultraviolet and optical signals were oddly bright and faded fast.

BeppoSAX is an Italian - Dutch satellite, launched late last year, that detects gamma ray bursts and provides precise sky positions to allow ground - based telescopes to observe them.

Gamma - ray bursts come in two varieties — long and short — depending on how long the flash of gamma rays lGamma - ray bursts come in two varieties — long and short — depending on how long the flash of gamma rays lgamma rays lasts.