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4 gamma ray bursts so far today
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hey
User ID: 395526
3/19/2008 10:43 AM
Report abusive post | |
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Anonymous Coward
User ID: 294613
3/19/2008 10:44 AM | | Re: 4 gamma ray bursts so far today | Quote |
Make it 6. WTF does that mean and wear the hell are the continents. |
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hey
User ID: 395526 (OP)
3/19/2008 10:46 AM | | Re: 4 gamma ray bursts so far today | Quote |
Six? I only see for with todays date...hmm? |
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hey
User ID: 395526 (OP)
3/19/2008 10:47 AM | | Re: 4 gamma ray bursts so far today | Quote |
Shit, four! |
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Anonymous Coward
User ID: 302889
3/19/2008 10:50 AM | | Re: 4 gamma ray bursts so far today | Quote |
where are these GRBs coming from? The sun? The center of the galaxy? A star? |
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Klaak
User ID: 390748
3/19/2008 10:51 AM | | Re: 4 gamma ray bursts so far today | Quote |
Please enlighten me as to what they are / what this means? Thanks |
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D.MC
User ID: 377852
3/19/2008 10:51 AM | | Re: 4 gamma ray bursts so far today | Quote |
i also see 6 outbursts .. ? where are these outbursts and what do these mean ?
theyre were more in the past i see by the grey dots..
what does it mean ? |
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Anonymous Coward
User ID: 170917
3/19/2008 10:53 AM | | Re: 4 gamma ray bursts so far today | Quote |
how long does it take for the effects to hit earth?
there was a huge GRB three or four days before the 9.2 EQ that caused the Indonesia tsunami |
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Nothing Is True
User ID: 394832
3/19/2008 10:55 AM
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Anonymous Coward
User ID: 129376
3/19/2008 10:56 AM | | 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 Quoting: Anonymous Coward 170917
"caused the Indonesia tsunami" ? Bullshit, you don't have the slightest clue what you are talking about. |
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D.MC
User ID: 377852
3/19/2008 10:57 AM | | Re: 4 gamma ray bursts so far today | Quote |
why dont you inform us wit what it does mean than ? |
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Anonymous Coward
User ID: 129376
3/19/2008 10:57 AM | | 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
Sorry, I mieread you post. Please ignore my respone.
GRB have nothing to do with EQs BTW. |
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Anonymous Coward
User ID: 170917
3/19/2008 10:58 AM | | 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
that was not my opinion, it is from an article that I read.
I leave those matters to the scientists, are you one? |
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D.MC
User ID: 377852
3/19/2008 11:00 AM | | Re: 4 gamma ray bursts so far today | Quote |
does this mean than..
that electricity could fall out massive on thouse spots ? and maybe not work for years..
does it mean that the biosphere gets damaged so bad it will hit the people on thouse spots living ? |
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Anonymous Coward
User ID: 390748
3/19/2008 11:00 AM | | Re: 4 gamma ray bursts so far today | Quote |
Wiki article About Gamma Rays and Earth Extinction:
"Research has been conducted to investigate the consequences of Earth being hit by a beam of gamma rays from a nearby (about 500 light years) gamma ray burst. This is motivated by the efforts to explain mass extinctions on Earth and estimate the probability of extraterrestrial life. A gamma ray burst at 6000 light years would result in mass extinction; a 1000 light year distant burst would be equivalent to a 100,000 megaton nuclear explosion. A burst 100 light years away would blow away the atmosphere, create tidal waves, and start to melt the surface of the earth. There is a one in a million chance that there could be a gamma ray burst as near as the earth's closest star, Alpha Centauri, in the lifetime of the earth. Such a burst, at 4.3 lightyears distant, would effectively incinerate the earth[32].
A consensus seems to have been arrived at the fact that damage by a gamma ray burst would be very limited because of its very short duration, and the fact that it would only cover half the Earth, the other half being in its shadow. A sufficiently close gamma ray burst would however, result in serious damage to the atmosphere, shutting down communications (due to electro-magnetic disturbances), perhaps instantly wiping out half the ozone layer, and causing nitrogen-oxygen recombination, thereby generating acidic nitrogen oxides. These effects could diffuse across to the other side of the Earth, severely diminish the global food supply, and result in long-term climate and atmospheric changes and a mass extinction, reducing the global population to perhaps 10% of what it can now support. However, the damage from a gamma ray burst would probably be significantly greater than a supernova at the same distance." |
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Anonymous Coward
User ID: 129376
3/19/2008 11:00 AM | | Re: 4 gamma ray bursts so far today | Quote |
why dont you inform us wit what it does mean than ? Quoting: D.MC 377852
[link to en.wikipedia.org]
"Most observed GRBs appear to be collimated emission caused by the collapse of the core of a rapidly rotating, high-mass star into a black hole. A subclass of GRBs (the "short" bursts) appear to originate from a different process, the leading candidate being the collision of neutron stars orbiting in a binary system. All known GRBs originate from outside our own galaxy; though a related class of phenomena, SGR flares, are associated with Galactic magnetars. The sources of most GRBs are billions of light years away." |
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Anonymous Coward
User ID: 302889
3/19/2008 11:01 AM | | Re: 4 gamma ray bursts so far today | Quote |
Sooo... all of these GRBs are coming from different constellations.
Burst Details
GRB ID GRB 080319A
Mission Swift
Date 2008/03/19
Time 01:57:09 UTC
Coordinates
Right ascension 16:18:32
Declination -15:16:30
Galactic Lon. 359.17°
Galactic Lat. 24.27°
Constellation of Scorpius
Burst Details
GRB ID GRB 080319B
Mission Swift
Date 2008/03/19
Time 05:45:42 UTC
Coordinates
Right ascension 13:45:24
Declination 44:04:44
Galactic Lon. 93.79°
Galactic Lat. 69.87°
Constellation of Canes Venatici
Burst Details
GRB ID GRB 080319C
Mission Swift
Date 2008/03/19
Time 06:12:49 UTC
Coordinates
Right ascension 14:31:42
Declination 36:18:10
Galactic Lon. 62.54°
Galactic Lat. 66.88°
Constellation of Bootes
Burst Details
GRB ID GRB 080319D
Mission Swift
Date 2008/03/19
Time 12:25:56 UTC
Coordinates
Right ascension 17:15:53
Declination 55:24:35
Galactic Lon. 83.35°
Galactic Lat. 35.45°
Constellation of Draco |
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D.MC
User ID: 377852
3/19/2008 11:02 AM | | Re: 4 gamma ray bursts so far today | Quote |
Research has been conducted to investigate the consequences of Earth being hit by a beam of gamma rays from a nearby (about 500 light years) gamma ray burst. This is motivated by the efforts to explain mass extinctions on Earth and estimate the probability of extraterrestrial life. A gamma ray burst at 6000 light years would result in mass extinction; a 1000 light year distant burst would be equivalent to a 100,000 megaton nuclear explosion. A burst 100 light years away would blow away the atmosphere, create tidal waves, and start to melt the surface of the earth. There is a one in a million chance that there could be a gamma ray burst as near as the earth's closest star, Alpha Centauri, in the lifetime of the earth. Such a burst, at 4.3 lightyears distant, would effectively incinerate the earth |
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D.MC
User ID: 377852
3/19/2008 11:05 AM | | Re: 4 gamma ray bursts so far today | Quote |
ok
how many light years are they away from us ? if it'st more than 10 were fucked anyways right ? |
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Anonymous Coward
User ID: 381076
3/19/2008 11:08 AM | | Re: 4 gamma ray bursts so far today | Quote |
Gamma ray bursts don't seem that unusual, but FOUR in a single day does. I followed the burst list all the way back to August 2004, and today is the only day showing FOUR bursts on the entire list. |
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Anonymous Coward
User ID: 258519
3/19/2008 11:27 AM | |
hey
User ID: 395526 (OP)
3/19/2008 11:30 AM | | Re: 4 gamma ray bursts so far today | Quote |
Here you will find all the info you need about gamma ray bursts...
[link to imagine.gsfc.nasa.gov]
Four is unusual for one day, interesting stuff. |
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Anonymous Coward
User ID: 170917
3/19/2008 11:32 AM | | Re: 4 gamma ray bursts so far today | Quote |
on 12/20/04, six days before the 9.2 EQ, the third burst in one day brought this comment from the GRB
<Astonishingly, Swift has detected a third burst in a single day! While this does not break a record, it does tie the BATSE detector that was on board the Compton Gamma ray Observatory, which once also recorded three bursts in one day. There were two clear peaks in this burst, for a total duration of 40 seconds. There may have even been an earlier burst 40 seconds earlier, but this was not well-located by Swift and may be unassociated with GRB 041219c. >
just noting here that it is obviously unusual for this many in one day, and is a record
wow
and I am not saying that these bursts have anything to do with causing EQ's, cause I don't know |
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Klaak
User ID: 390748
3/19/2008 11:37 AM | | Re: 4 gamma ray bursts so far today | Quote |
I don't know about you, but it feels like some major global situation will be heading our way in the next few days. |
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Anonymous Coward
User ID: 258519
3/19/2008 11:38 AM | |
hey
User ID: 395526 (OP)
3/19/2008 11:38 AM | | Re: 4 gamma ray bursts so far today | Quote |
I also recall a lot of quake activity after a slew of gamma ray bursts a couple years ago. I don't know if there is any relation between the two but it is something to consider isn't it? After all if our planet was in the path of the strongest known energy being released in our direction why wouldn't it be possible that it could have an affect on the planet? |
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Ebidah 
User ID: 361183
3/19/2008 11:39 AM
 | | Re: 4 gamma ray bursts so far today | Quote |
On December 26, 2004 a magnitude 9.3 earthquake occurred in the Indian Ocean off the coast of Sumatra in Malaysia. It caused a powerful tsunami which devastated coastal regions of many countries leaving over 240,000 people either dead or missing. It was the worst tsunami to affect this area since the 1883 explosion of Krakatao. The earthquake that produced it was so strong that it exceeded by a factor of 10 the next most powerful earthquake to occur anywhere in the past 25 years.
Indonesian 9.3 Richter earthquake:
December 26, 2004 at 00 hours 58 minutes (Universal Time)
It is then with some alarm that we learn that just 44.6 hours later gamma ray telescopes orbiting the Earth picked up the arrival of the brightest gamma ray burst ever recorded!
Gamma ray burst arrival:
December 27, 2004 at 21 hours 36 minutes (Universal Time)
This gamma ray blast was 100 times more intense than any burst that had been previously recorded, equaling the brightness of the full Moon, but radiating most of its energy at gamma ray wavelengths. Gamma ray counts spiked to a maximum in 1.5 seconds and then declined over a 5 minute period with 7.57 second pulsations. The blast temporarily changed the shape the Earth's ionosphere, distorting the transmission of long-wavelength radio signals. See stories at
[link to www.space.com]
[link to www.freerepublic.com]
It was determined that the burst originated from the soft gamma ray repeater star, SGR 1806-20, a neutron star 20 kilometers in diameter which rotates once every 7.5 seconds, matching the GRB pulsation period. SGR 1806-20 is located about 10 degrees northeast of the Galactic center and about 20,000 to 32,000 light years from us, or about as far away as the Galactic center. (Originally, it had been thought to be 45,000 light years from us. but new results place it closer.) The outburst released more energy in a tenth of a second than the Sun emits in 100,000 years. Other gamma ray bursts have been detected whose explosions were intrinsically more powerful than this one at the source of the explosion, but since those explosions originated in other galaxies tens of thousands of times more distant, the bursts were not nearly as bright when they reached our solar system. What makes the December 27th gamma ray burst unique is that it is the first time that a burst this bright has been observed, one that also happens to originate from within our own Galaxy.
Astronomers have theorized that gamma ray bursts might travel in association with gravity wave bursts. In the course of their flight through space, gamma rays would be deflected by gravitational fields and would be scattered by dust and cosmic ray particles they encountered, so they would be expected to travel slightly slower than their associated gravity wave burst which would pass through space unimpeded. After a 45,000 year light-speed journey, a gamma ray burst arrival delay of 44.6 hours would not be unexpected. It amounts to a delay of just one part in 9 million. So if the gravity wave traveled at the speed of light (c), the gamma ray burst would have averaged a speed of 0.99999989 c, just 0.11 millionths slower. There is also the possibility that at the beginning of its journey the gravity wave may have had a superluminal speed;
The 9.3 Richter earthquake was ten times stronger than any other earthquake during the past 25 years, and was followed just 44.6 hours later on December 27th by a very intense gamma ray burst, which was 100 fold brighter than any other in the past 25 year history of gamma ray observation. It seems difficult to pass off the temporal proximity of these two Class I events as being just a matter of coincidence. A time period of 25 years compared to a time separation of 44.6 hours amounts to a time ratio of about 5000:1. For two such unique events to have such a close time proximity is highly improbable if they are not somehow related. But, as mentioned above, gravity waves would very likely be associated with gamma ray bursts, and they would be expected to precede them.
Many have inquired if there might be a connection between these two events (e.g., see the Space.com article). Not thinking of the gravity wave connection, astronomers have been reluctant to admit there might be a connection since they know of no mechanism by which gamma rays by themselves could trigger earthquakes. They admit that the December 27th gamma ray burst had slightly affected the ionization state of the Earth's atmosphere, but this by itself should not have caused earthquakes. However, if a longitudinal gravity potential wave pulse were to accompany a gamma ray burst, the mystery becomes resolved. The connection between earthquakes and gamma ray bursts now becomes plausible.
In his 1983 Ph.D. dissertation, Paul LaViolette called attention to terrestrial dangers of Galactic core explosions, pointing out that the arrival of the cosmic ray superwave they produced would be signaled by a high intensity gamma ray burst which would also generate EMP effects (e.g., see Page 3). He also noted that a strong gravity wave might be expected to travel forward at the forefront of this superwave and might be the first indication of a superwave's arrival. He pointed out that such gravity waves could induce substantial tidal forces on the Earth during their passage which could induce earthquakes and cause polar axis torquing effects.
[link to www.etheric.com]
If you're falling off a cliff, you may as well try to fly. You have nothing to lose.
Enlightenement: It's what life looks and feels like when you're finally willing to drop all pretense and start getting real. |
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Ebidah
User ID: 361183
3/19/2008 11:40 AM
| | Re: 4 gamma ray bursts so far today | Quote |
What may have caused the quake that came ahead of the visible part of the gamma ray burst would have been a gravity wave.
If you're falling off a cliff, you may as well try to fly. You have nothing to lose.
Enlightenement: It's what life looks and feels like when you're finally willing to drop all pretense and start getting real. |
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Anonymous Coward
User ID: 258519
3/19/2008 11:41 AM | | Re: 4 gamma ray bursts so far today | Quote |
on 12/20/04, six days before the 9.2 EQ, the third burst in one day brought this comment from the GRB
<Astonishingly, Swift has detected a third burst in a single day! While this does not break a record, it does tie the BATSE detector that was on board the Compton Gamma ray Observatory, which once also recorded three bursts in one day. There were two clear peaks in this burst, for a total duration of 40 seconds. There may have even been an earlier burst 40 seconds earlier, but this was not well-located by Swift and may be unassociated with GRB 041219c. >
just noting here that it is obviously unusual for this many in one day, and is a record
wow
and I am not saying that these bursts have anything to do with causing EQ's, cause I don't know
sure it is just a coincidence
 |
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hey
User ID: 395526 (OP)
3/19/2008 11:44 AM | | Re: 4 gamma ray bursts so far today | Quote |
[link to www.theaustralian.news.com.au]
Death star threat to planet Earth
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Print Page:Print
By Samuel Cardwell | March 03, 2008
EARTH may be staring down the barrel of one of the galaxy's most beautiful and potentially deadly objects.
A highly unstable star at the end of its life could unleash a burst of gamma-ray radiation directed straight at Earth, any time between now and the next couple of hundred thousand years.
University of Sydney astronomer Peter Tuthill discovered an elegant rotating pinwheel system known as WR104 in the constellation Sagittarius eight years ago.
It contains a Wolf-Rayet star, the last stop in a star's life before it explodes in a massive supernova.
While studying WR104's striking and colorful shape, Dr Tuthill noticed that the perfect spiral he was observing could only occur when staring right down the centre of it.
"Viewed from Earth, the rotating tail appears to be laid out on the sky in an almost perfect spiral,'' Dr Tuthill said.
"It could only appear like that if we are looking nearly exactly down on the axis of the binary system.''
For most people, the word deathstar conjures images of the planet-destroying space station in Star Wars movies.
While Dr Tuthill's colorful spiral is far more beautiful than that rather ugly and menacing grey sphere, it is no less deadly.
Earth could be right in the firing line when the star eventually explodes.
"Sometimes, supernovae like the one that will one day destroy WR104 focus their energy into a narrow beam of very destructive gamma-ray radiation along the axis of the system,'' Dr Tuthill said.
"If such a gamma-ray burst happens, we really do not want Earth to be in the way.''
WR104 is about 8,000 light years away from Earth, which is right down the street in galactic terms and Dr Tuthill believes there is evidence that Earth may have been hit by one of these bursts before.
"Earlier research has suggested that a gamma-ray burst ... could be harmful to life on Earth out to these distances,'' he said.
"And scientists have speculated that, eons ago, a gamma-ray burst from a distant star could explain mass extinctions seen in the fossil record.''
A group of US scientists calculated that a 10 second burst of gamma-rays could deplete as much as 50 per cent of the Earth's protective ozone layer, allowing through potentially deadly radiation.
But don't go digging a shelter in your backyard and stocking up on sunscreen just yet, as Dr Tuthill says that the fully fledged gamma-ray burst is the worst case scenario.
"The two extremes are a very directed beam along the axis or a spherical explosion but the reality is that WR104 might lie somewhere in the middle of that, it has a preference for beaming things our way but maybe not as deadly as a fully fledged burst,'' Dr Tuthill said.
If the worst does happen, we can't expect much warning.
The first signs of the star's explosion would be the detection of the gamma-rays and it may have already happened.
"It could have gone off 8,000 years ago and we wouldn't know it, it could go off tomorrow, any time in the next couple of hundred thousand years is all we can say, but in astronomy terms that's imminent and we can't say any more than that,'' Dr Tuthill said.
"The question really boils down to whether or not WR104 could generate a gamma-ray burst when it goes supernova, and that's a question that I think the jury is still out on.
"But in any event we will have a ringside seat for a pretty impressive fireworks display.'' |
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hey
User ID: 395526 (OP)
3/19/2008 11:46 AM | | Re: 4 gamma ray bursts so far today | Quote |
Great stuff Ebidah, thanks! |
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