Sentences with phrase «ray afterglow»

First limits on the very - high energy gamma - ray afterglow emission of a fast radio burst.

Evidence for a decreasing X — ray afterglow emission of GW 170817A / GRB 170817A in XMM - Newton observations.

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.

Another orbiting eye on the cosmos, the Compton Gamma - Ray Observatory, which was launched in 1991, recorded the transient afterglow of a mysterious gamma ray burst.

Related sites Gamma ray burst afterglows Optical Observations of GRBs An explanation of microlensing Joining the GRB Network as an amateur

Dark Matter is thought to exist because of its gravitational effects on stars and galaxies, gravitational lensing (the bending of light rays) around these, and through its imprint on the Cosmic Microwave Background (the afterglow of the Big Bang).

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.

Over the next decade, Southwood's «cosmic vision» program calls for, among other goals, landing spacecraft on Mars, Mercury, Saturn's moon Titan, and a comet; observing the birth, evolution, and death of stars and galaxies at gamma ray and infrared wavelengths; studying the afterglow of the big bang; and mapping the positions and motions of nearly every star in the Milky Way.

The team used the Faint Object Camera and Spectrograph (FOCAS) mounted on the Subaru Telescope to thoroughly study the visible wavelength spectrum (Note 1) of the afterglow of a gamma - ray burst (GRB, Note 2), which is a violent explosion of a massive star.

Spectrum of gamma - ray burst's afterglow indicates beginning of re-ionization process.»

But astronomers may have pulled off an equally challenging feat: detecting the glimmer of a supernova explosion in the fading afterglow of a titanic gamma ray burst (GRB)-- one of the biggest type of explosions in all the cosmos.

The burst and afterglow of GRB 090423 is not unlike that of closer (and hence more recent) gamma - ray bursts, pointing to a later - generation progenitor.

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

«It's the most distant gamma - ray burst, but it's also the most distant object in the universe overall,» says Edo Berger of the Harvard - Smithsonian Center for Astrophysics, a member of the team that observed the afterglow with Gemini North.

Unfortunately, attempts to find the afterglow and therefore the source of short gamma - ray bursts proved fruitless.

The circumstellar environment of Wolf - Rayet stars and gamma - ray burst afterglows.

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

This allows it to study a variety of astronomical objects, such as the molecular gas in planetary nebulae, molecules on active comets, the heating mechanisms of red giants and the afterglows of gamma - ray bursts.

Quick follow - up observations undertaken with the 8.2 - m Antu instrument at European Southern Observatory's Very Large Telescope in the Paranal and the 1.5 - meter Danish telescope at La Silla identified a faint, point - like object in visible light that was fading rapidly, the optical counterpart of the gamma - ray burst called the «afterglow» (Pedersen et al, 2000).

By the time a spectrum of the gamma - ray burst's afterglow was obtained on February 8, 2000, its brightness had decreased further.

A specialized camera on a telescope operated by U.K. astronomers from Liverpool has made the first measurement of magnetic fields in the afterglow of a gamma - ray burst (GRB).

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.

Although GRB 000131, like other gamma - ray bursts, appears to have taken place in a remote «early galaxy» (or «sub-galactic clumps» of stars) that is smaller than today's luminous galaxies, astronomers found it difficult to detect that extremely dim, sub-galactic clump of stars even with the Hubble Space Telescope, as the observed fading of the afterglow indicated that the maximum brightness of the gamma - ray emission was explosion was at least 10,000 times brighter than its host galaxy.