Sentences with phrase «called gamma ray bursts»

That's the conclusion of a group of physicists who studied the effects of massive cosmic explosions, called gamma ray bursts, on planets.

The blast, called a gamma ray burst (GRB), probably arose from the explosive death of a star when the universe was just 900 million years old.

Two seconds after the gravitational signal, which only the automated «trigger» of the Hanford detector initially noticed, NASA's orbiting Fermi Gamma - ray Space Telescope picked up a blast of high - energy photons called a gamma ray burst.

Ray Jayawardhana: It is a clue that most likely, these high energy neutrinos come either from jets of particles that are accelerated by super massive black holes at the hearts of galaxies, or from really gigantic stars that explode at the end of their lives that also produce a phenomenon we call gamma ray bursts, which also might accelerate particles to very high speeds and energies.

Not exact matches

This so - called gamma - ray burst, now known officially as GRB 990123, was one of the most energetic and the most closely observed ever.

Such cataclysms are expected to generate a high - energy flash of light, called a gamma - ray burst (yellow jets).

Other stellar explosions called gamma - ray bursts can also briefly outshine the stars, but the explosive black - hole merger sets a mind - bending record, says Kip Thorne, a gravitational theorist at Caltech who played a leading role in LIGO's development.

The results of two studies of recent gamma - ray bursts, published today in the journal Science, indicate that exploding stars called supernovae may spawn some of these blasts.

If that jet is aimed directly at Earth, telescopes can see it as an ephemeral flash of light called a short gamma - ray burst, or GRB.

They could have emerged from gamma - ray bursts, mysterious and short - lived cataclysms that briefly rank as the brightest objects in the universe; shock waves from exploding stars; or so - called blazars, jets of energy powered by supermassive black holes.

Extremely bright exploding stars, called superluminous supernovae, and long gamma ray bursts also occur in this type of galaxy, he noted, and both are hypothesized to be associated with massive, highly magnetic and rapidly rotating neutron stars called magnetars.

Gamma ray bursts (GRBs) and other cosmic explosions called x-ray flashes are the same phenomenon in different guises.

The source might be something we already know about — possibly the fierce explosions called gamma - ray bursts that are thought to mark the birth of black holes.

Scientists spotted a phenomenon called a short gamma - ray burst, a brief spurt of high - energy light, less than two seconds long.

We now aptly call them «gamma ray bursts,» and they originate from supernovae and from the collisions of superdense objects like neutron stars.

It is expected to operate for 10 years, observing high - energy gamma - ray photons from violent supermassive black holes and mysterious cosmic explosions called gamma - ray bursts.

Astronomers have known for three decades that brilliant flashes of these rays, called gamma - ray bursts, arrive daily from random directions in the sky.

But smaller - scale bursts called terrestrial gamma - ray flashes (TGFs) can occur much closer to home, erupting thousands of times a year in association with lightning strikes during storms in Earth's atmosphere.

Off the coast of west Africa, perched on the highest point of the Canary Islands, a gamma - ray telescope called MAGIC — the name stands for the Major Atmospheric Gamma - ray Imaging Cherenkov telescope — scans the heavens for bursts of high - energy photons from far corners of the univgamma - ray telescope called MAGIC — the name stands for the Major Atmospheric Gamma - ray Imaging Cherenkov telescope — scans the heavens for bursts of high - energy photons from far corners of the univGamma - ray Imaging Cherenkov telescope — scans the heavens for bursts of high - energy photons from far corners of the universe.

Most previous studies of apocalyptic astronomical events — like asteroid impacts, neighboring stars going supernova or insanely energetic explosions called gamma - ray bursts — focused on their threat to humankind.

Researchers should be able to monitor gamma - ray bursts almost immediately after GLAST comes online by using its second instrument, called the GLAST burst monitor (GBM).

«We know that when a gamma - ray burst explodes, it produces a blast of material called a fireball, which expands at relativistic speeds like a rapidly inflating bubble,» Piro explains.

Astrophysicists have typically focused on long gamma ray bursts, she adds, calling the short variety «kind of like the hipster class of gamma ray bursts.»

It has been suggested that gamma rays coming from the dense region of space in the inner Milky Way galaxy could be caused when invisible dark matter particles collide, but two new studies suggest that the gamma ray bursts are due to other astrophysical phenomena such as fast - rotating stars called millisecond pulsars.

Besides confirming theories about the source of some short - duration gamma - ray bursts and the formation mechanism of many of the heavy elements including platinum, lead, gold, and rare earth elements, the gravitational waves enabled us to get a distance to the galaxy independent of the usual step - by - step procedure called the «distance scale ladder».

The gamma - ray burst was created by a relatively large supernova that is sometimes called a «hypernova.»

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).

Around 4 p.m. PDT, the Swope Telescope — the oldest and smallest of a collection of four optical telescopes at Carnegie Observatories» Las Campanas Observatory in Chile — detected a bright optical counterpart to the gamma - ray burst and gravitational - wave signals, in a galaxy called NGC 4993.