Ultrabright Gamma-ray Burst "Blinded" NASA Telescope
2010 07 15
A flash of light that likely signaled the birth of a black hole was so bright it briefly blinded a NASA telescope—even though the light came from five billion light-years away.
From its orbit around Earth, the Swift telescope has been scanning the skies since 2004 for mysterious, ultrabright flashes known as gamma-ray bursts.
Gamma rays are the most energetic forms of light, which means they're capable of penetrating even denser chunks of matter than x-rays, noted Swift lead scientist David Burrows. Because of this, we can see gamma rays that have traveled from sources at very edges of the observable universe.
(See a picture of a gamma-ray burst that was visible to the naked eye.)
About once a day somewhere in the sky there’s a brilliant burst of gamma rays. Astronomers think these bursts happen when the cores of very massive, dying stars collapse, generating powerful explosions and giving rise to new black holes.
Swift was designed to look for these bright events and study the initial flash of gamma rays and high-energy x-rays as well as the "afterglow" of lower-energy x-rays and ultraviolet light. Even though it can’t scan the whole sky at once, the telescope typically finds about two gamma-ray bursts a week.
But on June 21 a rush of light from a minute-long gamma-ray burst proved so overwhelming that Swift’s data processing software temporarily shut down.
"This thing was so bright it completely saturated the detectors," said Burrows, who is also a professor of astronomy and astrophysics at Penn State University.
Swift "wasn’t hurt or anything. But the software on the ground thought something was wrong with the data and threw it out. We didn’t catch what happened for almost a week."
"Blinding" Light Sets a Gamma-ray Record
Luckily Swift team member Phil Evans, a postdoctoral researcher at the U.K.’s University of Leicester, went back through the scrapped data and discovered the burst’s true power.
Until now, scientists thought the brightest gamma-ray bursts sent out a maximum of 10,000 x-ray photons a second.
But at its peak, the newfound burst sent out 145,000 photons a second, Burrows said—making this gamma-ray burst 10 to 15 times brighter than anything previously seen by Swift’s x-ray telescope.
"We've spent a lot of time over the past couple weeks trying to figure out if there was some kind of mistake," Burrows said. "But as far as we can tell, this is correct."
(Related: "Gamma-Ray Burst Caused Mass Extinction?")
Now the scientists are puzzling over what could have caused this particular burst to be a record setter.
What they do know is that the light must be coming from very close to the newborn black hole, which must be a relatively small object.
"You can't get a large object flickering this quickly. It would have to be something very small and compact," Burrows said.
Bright Bursts Can Be Cosmic Lighthouses
The blinding oddity adds a new wrinkle to future plans to use gamma-ray bursts to study the origins of the universe.
(Related: "Most Distant Object Found; Light Pierced 'Dark Age' Fog.")
One mission in the works, dubbed Xenia, proposes to use the bursts like beams from cosmic lighthouses, looking not at a burst itself, but at the distant dust and gases briefly illuminated by the explosion.
Using light from a gamma-ray burst, "we can measure the properties of gases between us and the burst and get information on the material in the very early history of the universe," Burrows said.
The newfound burst, he said, means that Xenia mission designers will have to go back to the drawing board to make sure the probe will be able to handle the brightest flashes the universe can dish out.
Milky Way Black Hole May Be a Colossal Particle Accelerator
Exploding Stars: Is Earth at Risk?
Satellites Track Strange "Earth Energy"
Scientists Observe Brightest Cosmic Explosion Ever Recorded
Anniversary of a cosmic blast
Latest News from our Front Page
Right into enemy hands? ISIS shows off new weapons allegedly airdropped by US (VIDEO)
2014 10 23
Islamic State has published a new video in which a jihadist shows off brand-new American hardware, which was purportedly intended for the Kurds they are fighting in the Syrian border town of Kobani.
The undated video, posted by the unofficial IS mouthpiece “a3maq news”, sees a jihadist showing several boxes of munitions with English-language markings, with a parachute spread out on ...
STAGED INFECTION: Has The Ebola ‘Outbreak’ Narrative Fallen Apart?
2014 10 22
Over the past month, the ‘pandemic’ propaganda surrounding the deadly Ebola virus seemed to reach vitriolic levels – raising serious questions about the validity of this current viral outbreak…
On Monday of this week, it was reported that 48 people were released and cleared after a 21-day quarantine due to their contact with the now deceased Ebola-stricken patient Thomas Eric ...
6,000-Year-Old Temple with Possible Sacrificial Altars Discovered
2014 10 21
A 6,000-year-old temple holding humanlike figurines and sacrificed animal remains has been discovered within a massive prehistoric settlement in Ukraine.
Built before writing was invented, the temple is about 60 by 20 meters (197 by 66 feet) in size. It was a "two-story building made of wood and clay surrounded by a galleried courtyard," the upper floor divided into five ...
What happened to Journalist Serena Shim? Assassinated? Find out what happened to Serena, Press TV director calls on Turkey
2014 10 21
Press TV news director Hamid Reza Emadi says the “suspicious death,” of the news channel’s correspondent in Turkey is a tragedy for “anyone who wants to get the truth.”
Emadi made the remarks in an interview with Press TV on Sunday following Serena Shim’s death across the border from Syria’s Kurdish city of Kobani, where the ISIL terrorists and Kurdish fighters ...
Ancient Roman Nanotechnology Inspires Next-Generation Holograms for Information Storage
2014 10 21
The Lycurgus Cup, as it is known due to its depiction of a scene involving King Lycurgus of Thrace, is a 1,600-year-old jade green Roman chalice that changes colour depending on the direction of the light upon it. It baffled scientists ever since the glass chalice was acquired by the British Museum in the 1950s, as they could not work ...
|More News » |