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GRB Alert
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Thomas
1/18/2005 2:17 AM
Report abusive post | GRB Alert
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January 17, 2005 - GRB050117
TITLE: GCN GRB OBSERVATION REPORT
NUMBER: 2951
SUBJECT: GRB050117: Swift XRT Position
DATE: 05/01/17 13:42:00 GMT
FROM: David Burrows at PSU/Swift
D. N. Burrows, J. E. Hill, G. Chincarini, J. Nousek, N. Gehrels, and P. Schady
report on behalf of the Swift XRT team:
The Swift XRT reported a prompt position for GRB050117. The burst was
discovered by the BAT and the Swift spacecraft performed a prompt slew. The
XRT found a bright source in the field and imaged it at
IMG_START_DATE: 13387 TJD; 17 DOY; 05/01/17
IMG_START_TIME: 46548.64 SOD {12:55:48.64} UT
The XRT position is
GRB_RA: 358.4644d {+23h 53m 51s} (J2000),
358.5274d {+23h 54m 07s} (current),
357.8439d {+23h 51m 23s} (1950)
GRB_DEC: +65.9418d {+65d 56ī 30"} (J2000),
+65.9699d {+65d 58ī 12"} (current),
+65.6635d {+65d 39ī 49"} (1950)
last one was dec 21st.
[link to gcn.gsfc.nasa.gov]
I expect to see a large quake again from now to 7 days |
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~Marianne~
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
can you translate that into english please? |
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star gazer
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Gamma Ray Burst |
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~Marianne~
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
thanks star |
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i is that which i is
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
 Hi All,
Simple>
The burst occurred at 12:52:36 UT (Sakamoto et al., GCN 2952) just before Swift
entered the South Atlantic Anomaly (SAA) and while the burst location was
within the Swift Earth limb constraint. The Swift spacecraft began slewing to
the burst at 12:54:38 UT, while in the SAA. The XRT imaged the source
immediately after the slew ended, at 12:55:48.64 UT. The source was very
bright, resulting in a successful centroid on the first 0.1s Image Mode
exposure. The XRT then collected a partial Photodiode Mode frame and stopped
data collection because it was in the SAA. Although we have not yet calibrated
fluxes measured in XRTīs Image Mode, the X-ray source intensity in the Image
Mode frame appears to be comparable to Cyg X-2, which puts it at roughly 1/2
Crab (based on RXTE ASM data on Cyg X-2 and the Crab).
The source is located just outside the zero-visibility region around the Swift
orbit pole and has only short periods of visibility on each orbit. Most of
these visible periods occur while Swift is in the SAA, which limits the
amount of time when the source can be viewed by the XRT. Automated observations
will proceed for the rest of 2005 Jan 17 when the source is visible. We expect
to obtain a total observing time of about 15 minutes, spread out between 12:55
UT and 19:29 UT. Because of orbital precession, the source will not be visible
again by the Swift XRT until 2005 Jan 21.
Donīt ask me what it means. 
Peace, light, and love.  |
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Anonymous Coward
12/8/2005 10:11 AM | |
Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
I is to what I is?
do you have a link to that data? Itīs pouring here, so I canīt use my scope. I would like to photograph a burst, but the weather has been poor to even try. |
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star gazer
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Is this maybe Supernova 1987A that NASA said would throw off a final burst that would be visable in 2005? |
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Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Anyone know how to read those coordinates to tell what part of the sky this came from?
Is there a wedsite that you can plug them into?
OP, Iīm with you on the: energy in = eq out! I think it may have some sensitivity in fault zones but in other more stable places I think the energy ends up powering a weather system. |
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~Marianne~
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
I have had a headache for the past 3 days |
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Thomas
12/8/2005 10:11 AM | |
star gazer
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Other than a very large iceburg Trav? Is that why SATs are down? |
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~Marianne~
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Oh when i left work the sat was still down |
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k1w1
12/8/2005 10:11 AM | |
Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
The coordinates put it somewhere in the constellation of Cassiopeia.
Itīs got nothing to do with 1987a.
The south pole didnīt get "smacked" by anything.
A GRB millions of light years away DOESNīT cause any effects here - not even changes in the weather, and certainly not earthquakes (or headaches - if youīve had it for 3 days, see a doctor).
Of course you people donīt want the issue coulded by FACTS, do you?
 |
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Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
itz just a rumor SG but ya that is what i heard...
===
So, an event millions of light years away which lasts at most a few seconds, and which happened on the 5th somehow caused a satellite to move out of position a couple of days ago?
DO you know ow much energy reaches earth from these events? Do you never wonder why they haev to put the detectors for them in space?
Traveller, you show every day how much of an idiot you are.
"that is what i heard" - you heard nothing, you made it up. Why not admit it for once. |
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Anonymous Coward
12/8/2005 10:11 AM | |
Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Thanks for those links, AC. |
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star gazer
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
"Until recently, GRBs were arguably the biggest mystery in high-energy astronomy. They were discovered serendipitously in the late 1960s by U.S. military satellites which were on the look out for Soviet nuclear testing in violation of the atmospheric nuclear test ban treaty. These satellites carried gamma ray detectors since a nuclear explosion produces gamma rays."
[link to imagine.gsfc.nasa.gov] |
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Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
OK, Iīll qualify my statement.
IF (and itīs a big if) a GRB happened close enough it coudl affect earth. If it was close enough it could well kill off all life on earth and setrilise the planet.
However the ones weīve observed up to now have all been a long, long way away, and will have NO EFFECT on earth. Certainly none of the stupid speculations above. The actual energy received n the detectors is TINY, and not enough to do anything here.
And traveller is still an idiot who makes up end-of-the world stuff to scare people for fun. |
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Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
AC 2:54 your wrong. Iīll dig up a couple of the articles/abstracts that I was reading earlier today that specifically mentions how a GRB effects earth.
One told about how it made the nightime ionosphere drop from ~90km to a ~60km daytime equivalent height. It said you as a layperson could even detect a GRB with a radio because it uses the ionosphere to bounce off of and you could hear the changes in the radio propegation. It was mostly about how the cosmic rays ionize the upper atmosphere.
Another told about how you can see the spin rate/frequency of the GRBīs magnetar in the oscillation of the ionosphere or maybe it said magnetosphere, Iīm not sure on that point.
Gamma rays are one type of cosmic ray. Cosmic rays do affect Earth. Wherever the rays are being measured at is where they are at at that time. If we are measuring them in ground base detectors then thatīs where they are, not light years away. |
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star gazer
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
?
"The middle hump of Cassiopeiaīs "W" bulges northward toward the North Star. In November 1572, a supernova appeared adjacent to the fainter star seen just northwest of the middle of the "W."
"For two weeks it was brighter than any other star in the sky, was visible in daylight and may even have cast faint shadows upon early season snows," Teske says. "After the supernova began to fade, it remained visible for another 16 months. Sixteenth-century observers left us a good record of its appearance and brightness changes."
[link to www.umich.edu] |
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Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Was there some point to that "star gazer"? (I doubt if you ever gaze at stars, or if you do itīs only in slack-jawed amazement.)
The GRB isnīt even at the same coordinates as the supernova - which youīd be able to tell easily if you were a star gazer.
Gee, two things happened years apart in roughly the same piece of sky - there MUST be some connection...
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Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
AC2:54/3:13, itīs not about how far away they are but how strong they are. Kind of like the Suns flares & CMEīs. Actually very like the Suns bursts but millions of times bigger and stronger. The strongest GRB measured was not in our Galaxy but there are some in our Galaxy that are gearing up. 2 right by the Galactic core. SGR 1806-20 & SGR 1900+14.
SGR 1806-20
[link to gcn.gsfc.nasa.gov]
Oh hereīs a good link with a map:
[link to antwrp.gsfc.nasa.gov]
Magnetars In The Sky
Explanation: Indicated on this infrared image of the galactic center region are positions of candidate magnetars -- believed to be the strongest magnets in the galaxy. Classified by observers as Soft Gamma Repeaters (SGRs) and Anomalous X-ray Pulsars (AXPs), these cosmic powerhouses are likely city-sized, spinning, highly-magnetized neutron stars. How strong is a magnetarīs magnetic field? The Earthīs magnetic field which deflects compass needles is measured to be about 1 Gauss, while the strongest fields sustainable in earthbound laboratories are about 100,000 Gauss. A magnetarīs monster magnetic field is estimated to be as high as 1,000,000,000,000,000 Gauss. A magnet this strong, located at about half the distance to the Moon would easily erase your credit cards and suck pens out of your pocket. In 1998, from a distance of about 20,000 light-years, one magnetar, SGR 1900+14 generated a powerful flash of gamma-rays detected by many spacecraft. That blast of high-energy radiation is now known to have had a measurable effect on Earthīs ionosphere. At the surface of the magnetar, its powerful magnetic field is thought to buckle and shift the neutron star crust generating the intense high-energy flares |
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star gazer
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
I GAZE - I donīt translate all the data. Notice the question mark at the top of my post. I started searching supernovas and came across it - I thought the description was interesting and possibly pertinent. Obviously I donīt know the coordinates or I wouldnīt have asked.
So if being a condiscending prick makes you feel really smart - go for it - everyone needs an ego crutch. |
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Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Stargazer, I think we ran him off
He must have been after your AV because he sure wasnīt here for the intelligent conversation.  |
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ScienceOnly *nli
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
GRB?
Oh yea. Far out, man.
I know that dude.
I played with that dude.
Groovy. |
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ScienceOnly *nli
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Thanks for the post Thomas. |
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Emperor Kenton
12/8/2005 10:11 AM | |
Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
Kenton, as usual you post irrelevant information (which you probably donīt understand).
These plots donīt show any activity on the 5th (when the GRB was detected).
And why post something from the south pole when the GRB was close to the north pole? |
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Anonymous Coward
12/8/2005 10:11 AM | | Re: GRB Alert | Quote |
AC 7:44, you should look at the date of the GRB detection again. Itīs not the 5th. It is the 17th. Donīt be so quick to try and put someone down.
You should try exploring the info and links that people share and see what īyouī can get out of it. Then share that with us.
If you have no interest in the subjects and links shared on this thread then it appears that your only here to disrupt.
Actually the south pole link is important because it shows that the sudden change/drop in cosmic ray detections is tied to the unsettling of our atmosphere and not necessarily an actual drop in rays outside this induced shield. This awareness of the shielding would let you know why you might not be able to detect the GRB from ground based instruments in certain spectums. This is what I get from this info and I welcome any correcting input if I have made any errors. |
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