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4 gamma ray bursts so far today
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Anonymous Coward
User ID: 340003
3/19/2008 2:36 PM | | Re: 4 gamma ray bursts so far today | Quote |
Some think gravity waves travel at the speed of thought. |
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Anonymous Coward
User ID: 18328
3/19/2008 2:42 PM | | Re: 4 gamma ray bursts so far today | Quote |
Signs in the heavens and in the earth. That's what the bible says. Shouldn't this be pinned?
I'll bet we see at least a 7 mag quake in the next week. This is a strange occurrence for GRB's.
Imagine sitting in a pool and someone drops a car into the water not far from you. This is the power of the wave depending on the distance from the object. There will be some type of fallout, bank on it. |
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Theteck
User ID: 395684
3/19/2008 2:53 PM | | Re: 4 gamma ray bursts so far today | Quote |
that weird different location in same day ?
a chance this can happen in space or we are very lucky to see this? |
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hey
User ID: 395685
3/19/2008 2:55 PM | | Re: 4 gamma ray bursts so far today | Quote |
Since January 1st 2008 there have been 24 detected bursts...five in one day is very rare I would think! |
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Theteck
User ID: 395684
3/19/2008 2:58 PM | | Re: 4 gamma ray bursts so far today | Quote |
ok burst description
maybe a bug
It is probable that this was not a real burst. Swift detected the event just as it was entering the South Atlantic Anomaly, a region of Earth's magnetic field with a relatively large amount of particle radiation. It seems likely this event was due to this; the X-Ray Telescope and the Ultraviolet/Optical telescopes did not detect any afterglow at all. |
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Theteck
User ID: 395684
3/19/2008 3:01 PM | | Re: 4 gamma ray bursts so far today | Quote |
wow allready updated
NOTE: There have been several bursts alerts today, but this one is evidently the only bona-fide burst seen. At least one was a previously known source, and we await confirmation of the other ones.
This GRB has an initial peak of emission that lasted for about 5-10 seconds, with a long 50 second decay. The X-Ray Telescope detected an uncatalogued, fading source which is the X-ray afterglow.
This one had a bright optical afterglow as well. A 0.3 meter telescope at the New Mexico Skies observatory reports the afterglow to have a magnitude of I (near-infrared) of 15 6 minutes after the burst, though it was very close to a bright star. This has been confirmed by the mammoth 8-meter European Southern Observatory telescope ESO-VLT UT2. Several other observatories are following-up.
more info
This burst had two peaks of gamma-ray emission: the first lasting 7 seconds, and the second starting 28 seconds later, lasting for about 15 seconds. In lower energy X-rays it brightened slowly and faded rapidly over the course of a couple of hours.
Although Swift saw no optical afterglow, a confirmed Faulkes telescope afterglow has been detected by several ground-based observatories (with larger telescopes -- the RAPTOR-S telescope was on the burst in under 1 minute and saw the afterglow). The burst appeared near an extended source, presumably a galaxy -- possibly the host galaxy, though this is unclear. A spectrum of the burst gives a redshift of z=1.165, or a distance of 8.3 billion light years.
The image displayed is from the 1.3 meter telescope at the MDM observatory in Kitt Peak, Arizona. |
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hey
User ID: 395685
3/19/2008 3:10 PM | |
Theteck
User ID: 395684
3/19/2008 3:11 PM | | Re: 4 gamma ray bursts so far today | Quote |
thanks :)
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hey
User ID: 395685
3/19/2008 3:17 PM | | Re: 4 gamma ray bursts so far today | Quote |
My pleasure. ;) |
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Anonymous Coward
User ID: 394873
3/19/2008 4:41 PM | | Re: 4 gamma ray bursts so far today | Quote |
 |
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childoflight
User ID: 395563
3/19/2008 4:55 PM | | Re: 4 gamma ray bursts so far today | Quote |
THERE ARE NOW 5!!!!! Does anyone know if this is unprecidented?  Does it affect air travellers if these are heading for us? Are they here yet or does it take a while. Where can I find a good site to educate myself? |
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Anonymous Coward
User ID: 385520
3/19/2008 4:57 PM | | Re: 4 gamma ray bursts so far today | Quote |
If they've already been detected the danger has passed...
Another day to celebrate life! |
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Anonymous Coward
User ID: 324203
3/19/2008 5:01 PM | | Re: 4 gamma ray bursts so far today | Quote |
If they've already been detected the danger has passed...
Another day to celebrate life! Quoting: Anonymous Coward 385520
Immediate danger that is. |
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childoflight
User ID: 395563
3/19/2008 5:15 PM | | Re: 4 gamma ray bursts so far today | Quote |
The Tsunami of 2004 came on 12-26. In that month gamma ray bursts were detected as follows 12/11 12/17 12/18 12/19 12/20 12/20 12/20 12/23 12/24 12/26 and 12/28. There was not another until 1/12/05. This month another swarm as follows 3/3 3/7 3/10 3/15 3/15 3/17 3/19 3/19 3/19 3/19 3/19 !!!!!!!!!!Do you think there could be a correlation?I searched the whole list avaiable from 2004 and could not come up wih a day that had over 3 bursts.  |
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Anonymous Coward
User ID: 385520
3/19/2008 5:18 PM | | Re: 4 gamma ray bursts so far today | Quote |
If they've already been detected the danger has passed...
Another day to celebrate life!
Immediate danger that is. Quoting: Anonymous Coward 324203
No, the danger has passed. Period. Remember, each burst is unique and disconnected from all other bursts. There is no pattern, there is no conspiracy out there... |
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Anonymous Coward
User ID: 258519
3/19/2008 6:31 PM | | Re: 4 gamma ray bursts so far today | Quote |
Who said anything about a conspiracy.
I tend to graph things, I see a trend. |
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Anonymous Coward
User ID: 385520
3/19/2008 8:30 PM | | Re: 4 gamma ray bursts so far today | Quote |
Who said anything about a conspiracy.
I tend to graph things, I see a trend. Quoting: Anonymous Coward 258519
There is no trend. One burst doesnt predict the next,,,, |
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Anonymous Coward
User ID: 395885
3/19/2008 8:49 PM | | Re: 4 gamma ray bursts so far today | Quote |
HIghly irregular and worth noting. Just add a couple bookmarks and make it part of the daily routine. Another day, another graph. OH an d the freakiest weather I have ever seen. |
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hey
User ID: 395685
3/19/2008 9:06 PM | | Re: 4 gamma ray bursts so far today | Quote |
I'll be watching, been bookmarked for a couple years now...today was one for the records. |
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Q
User ID: 375286
3/19/2008 9:11 PM | | Re: 4 gamma ray bursts so far today | Quote |
there was a huge GRB three or four days before the 9.2 EQ that caused the Indonesia tsunami
"caused the Indonesia tsunami" ? Bullshit, you don't have the slightest clue what you are talking about. Quoting: Anonymous Coward 129376
I think he's referring to the supernova explosion that occured in a distant galaxy on December 27, 2004.
[link to www.nasa.gov]
The theory is that supernova explosions produce gravity waves that may travel faster than the speed of light at first causing the EQs on December 24, 2004. NASA claims to be unable to detect gravy waves from supernova explosions for distant sources. |
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hey
User ID: 395685
3/19/2008 9:14 PM | | Re: 4 gamma ray bursts so far today | Quote |
Just wondering, what happens when our Sun takes a hit from a gamma ray burst? |
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hey
User ID: 395685
3/19/2008 9:47 PM | | Re: 4 gamma ray bursts so far today | Quote |
[link to www.sciencenews.org]
Supernova Outbreak: X rays signal earliest alert
Ron Cowen
Thanks to a lucky break and an overactive galaxy, astronomers have for the first time caught a massive star in the act of exploding. An X-ray outburst recently recorded by NASA's Swift satellite suggests that researchers began viewing the violent demise of a star in the galaxy NGC 2770 just a few seconds after the first X rays arrived at Earth, and hours before the first visible-light fireworks.
BANG. Astronomers serendipitously found the supernova SN 2008d, located in the galaxy NGC 2770, through X-ray observations (labeled as XRF080109). This observation marks the first finding of signs of a stellar explosion emitted so soon after a star's demise. The two other supernovas labeled here were found in this galaxy last year and in 1999.
A. de Ugarte Postigo/ESO et al, Dark Cosmology Centre/Univ. of Copenhagen, Instituto de Astrofísica de Andalucía (CSIC), and Univ. of Hertfordshire
Most supernovas aren't identified until they generate an outpouring of visible light, long after key information about the size and other properties of the collapsing star has vanished. The new finding suggests that astronomers using wide-angle X-ray telescopes could routinely witness the very beginnings of hundreds of supernova explosions each year, suggest Alicia Soderberg and her colleagues in an online posting.
Astronomers have previously observed the immediate aftermath of a related class of stellar explosions, the demise of massive stars that are signaled by gamma-ray bursts, the most powerful eruptions in the universe. But in each of the four cases for which researchers have firmly established the link between a supernova and a gamma-ray burst, the bright visible-light afterglows of the bursts hide the information-rich early emissions from the supernovas, Soderberg's team notes.
Early, X-ray signs of supernovas have been predicted for 4 decades but never before been found.
On Jan. 9, Soderberg and her colleagues were using an X-ray telescope on Swift to study a supernova in NGC 2770 that had been discovered 10 days earlier. Just as Swift began observations of this supernova, it recorded a fresh spike of X rays from another region in the galaxy that lasted for about 7 minutes. On Jan. 11, using the Gemini North telescope on Hawaii's Mauna Kea, Soderberg and her colleagues identified the visible-light fingerprint of the new supernova, now dubbed SN 2008d, in NGC 2770.
Soderberg, of Princeton University and the California Institute of Technology in Pasadena, and her collaborators posted their findings at xxx.lanl.gov/abs/0802.1712 on Feb. 13. They declined to comment for this story because they have submitted the article to Nature.
The team suggests that the outburst reflects the nature of the star that exploded. When stars more than about eight times the sun's mass succumb to gravity, their interiors implode, giving birth either to a neutron star or to a black hole. Tens of seconds after the collapse, a shock wave reaches the still unperturbed surface of the star and the region just beyond. It's in this relatively low-density environment that the energy locked inside the shock can finally be released as high-energy radiation, or X rays.
From the intensity and duration of the initial X-ray release, the researchers suggest that the star that exploded was compact but is surrounded by a substantial stellar wind, hurled by the star before it went supernova. The researchers suggest that the supernova belongs to a class known as Ibc, characterized by low abundances of hydrogen and silicon. Unlike the rare type of Ibc supernovas that produce gamma-ray bursts, this supernova is rich in helium.
Observing a supernova so early in the game shows "what the progenitor star [was like] just before the explosion," comments Roger Chevalier of the University of Virginia in Charlottesville.
"We haven't observed any supernova as early as SN2008d," says Yizhong Fan of the University of Copenhagen's Niels Bohr Institute and the Purple Mountain Observatory in Nanjing, China. "SN 2008d provides us a unique chance to see what happens when an Ibc supernova is born and then to constrain the underlying physics." Fan and his colleagues recently posted their own interpretation of the X-ray data online (xxx.lanl.gov/abs/0801.4325). They propose that the X-ray outburst is a lower-energy analog of a gamma-ray burst.
Li-Xin Lin of the Max Planck Institute for Astrophysics in Garching, Germany, comes to a similar conclusion in an article he posted online March 4 (xxx.lanl.gov/abs/0803.0079). The energy and duration of the X-ray outburst indicates the supernova "is an extension of the gamma-ray burst-supernova connection toward the low energy end," he says. "It also strengthens the GRB-supernova connection."
Even the early X rays recorded by Swift would arrive 10 seconds or more after other emissions—specifically, neutrinos and gravitational waves that emerge from the supernova's core, notes Andrew MacFadyen of New York University in New York City. However, an early X-ray alert would allow researchers to rapidly, if retroactively, determine exactly where and when to look for these crucial, core emissions. This ability offers the strongest promise for revealing the inner workings of supernova explosions. |
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Supreme Mind
User ID: 382578
3/19/2008 9:51 PM | | Re: 4 gamma ray bursts so far today | Quote |
1. There were FOUR bursts on March 19th, 2008 (all by Swift). The "first one" (in Scorpius) was due to star tracker having lost its lock, resulting in Sco X-1 (bright galactic X-ray source) falling out of Swift FOV and back in. The "sixth one" was due to the flare from another galactic source IGR J16479-4514 (there's a typo in GCN 7466).
2. There were FIVE bursts on February 19th, 1993 (all by BATSE): GRB 930219, 930219B, 930219C, 930219D, and 930219E, as well as on November 26th, 1994 (GRB 941126 thru 941126E).
3. There were ~25 more cases when BATSE has recorded FOUR bursts in one day (00:00:00-23:59:59 UT).
4. The day of March 19th, 2008 is unique in that ALL FOUR bursts detected on this date had optical afterglow (GRB 080319A - R=20.25 at T0+2.5 min, 080319B - about V=5.5m at maximum, 080319C - R=16.8 at T0+42.5 sec, and finally 080319D - V=19.5..20.0 at T0+151..251 sec).
5. The title of topic speaks for itself: even the brightest gamma-ray burst 080319B is at z=0.937, or 10 Bln lightyears away. So far, indeed! |
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hey
User ID: 395685
3/19/2008 9:56 PM | | Re: 4 gamma ray bursts so far today | Quote |
Supreme Mind thanks for sharing your knowledge & wit. Lucky for us space is far and wide! |
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Dances with Disambiguation 
User ID: 395915
3/19/2008 9:57 PM
 | | Re: 4 gamma ray bursts so far today | Quote |
OMG- This is awesome -- keep ya balance glp
:balance8:
"I am a emancipated octave of Creation that has expressed itself in holy and unholy ways."
Create your own Craft. |
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hey
User ID: 395685
3/19/2008 10:37 PM | |
* <-----star of destiny
User ID: 279402
3/19/2008 10:46 PM | | Re: 4 gamma ray bursts so far today | Quote |
Just wondering, what happens when our Sun takes a hit from a gamma ray burst? Quoting: hey 395685
Yes i have always wondered this my self. Good question. : ) |
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hey
User ID: 395685
3/19/2008 10:48 PM | |
hey
User ID: 395685
3/19/2008 10:50 PM | |
hey
User ID: 395685
3/19/2008 10:52 PM | | Re: 4 gamma ray bursts so far today | Quote |
What do all you space invaders make of the last JPG? |
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