Sentences with phrase «x-ray afterglow»

Reeves's team measured the spectral signature of a hot, expanding shell of supernova debris in the x-ray afterglow of another GRB, GRB 011211.

After detecting the initial flash, Swift focused on the burst's faint X-ray afterglow, a dim electromagnetic signal emitted when high - energy particles from the blast heat the surrounding material.

Not exact matches

If astronomers act quickly, they can turn other instruments toward the point of origin and record a rapidly fading afterglow of x-rays, visible light and radio waves.

As expected, Lin's images showed big X-ray sources at the two footprints and a 40 - million - degree afterglow that he believes marks the reconnection site.

As the wave expands and the fire fades, the afterglow changes «color» from x-ray to optical light to radio waves.

Last April astronomical detectives announced a break: An orbiting X-ray observatory picked up the chemical fingerprints of several elements in a burst's afterglow, identifying the object as an unusual type of supernova — the detonation of a massive, dying star.

Swift's X-Ray Telescope trained itself on GRB 090423 just 73 seconds after the satellite's Burst Alert instrument picked up the signal of the event, and Tanvir's team had the U.K. Infra - Red Telescope on Mauna Kea in Hawaii looking at the afterglow just 20 minutes after the burst.

Its three onboard instruments will observe GRBs and their afterglows in four different wavebands: gamma ray, X-ray, ultraviolet and optical.

Two other teams, one lead by Derek Fox of Caltech and the other lead by Jens Hjorth of the University of Copenhagen, detected x-ray and optical afterglows from the burst.

They also discovered that a monthlong afterglow followed the event that could be observed with instruments used to detect optical frequencies, x-rays or radio waves.

«Sure enough, the afterglow turned out to be brighter in the X-ray wavelengths, just as it was in the radio.»

Stefan Immler, Swift, GSFC, NASA Larger and jumbo X-ray images of GRB 090423's afterglow (image is 6.3 arcminutes wide).

After the gamma - ray signal disappears, these GRBs exhibit «afterglows» of x-rays, visible light, and radio waves.

An even more interesting possibility, however, is that x-ray flashers come from explosions in even more distant regions of the universe, where cosmic expansion since the Big Bang would have shifted emitted gamma rays into the x-ray range and intergalactic gas blocks visible afterglow, as none of these x-ray flashes have been observed to have a detectable, visible - light afterglow.

Another small proportion of GRBs exhibit comparatively short - duration bursts that average only 0.3 seconds and very little x-ray and optical afterglow (Gehrels et al, 2002).

However, X-ray, optical and radio emission continues in an «afterglow.»

While the burst's afterglow showed a steady decline in brightness at both optical and X-ray wavelengths, that was not the case at radio wavelengths.

The X-ray observations disfavor simple top - hat jets and support the scenario where both the X-ray and radio emissions are the afterglow of an outflow or structured jet.