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	Gamma ray burst - Wikipedia, the free encyclopedia
		A similar revolution in GRB astronomy is in progress today, largely as a result of the successful launch of NASA's Swift satellite, which combines a sensitive GRB detector with the ability to slew on-board X-ray and optical telescopes to the direction of a new burst in under one minute.
		GRBs themselves showed an extraordinary degree of diversity: they could be anywhere from a fraction of a second to many minutes in duration; bursts could have a single profile or oscillate wildly up and down in intensity; their spectra were highly variable and like nothing ever seen.
		The progenitors of long GRBs are believed to be massive, low-metallicity stars exploding due to the collapse of their cores; the progenitors of short GRBs are still unknown but mergers of neutron stars is probably the most popular model at the present time.
	en.wikipedia.org /wiki/Gamma_ray_burst (5406 words)

	GRB 000131
		GRB 000131 was located between 11 and 13 billion light-years (ly) from Sol, possibly within half a billion years of the Cosmic Dark Age before stars were born.
		GRB 000131 and its afterglow was found northwest of Canopus (Alpha Carinae); west of Tau Puppis; north of Delta Pictoris, and east of Beta Pictoris.
		GRBs have been found to be situated at extremely far (i.e., "cosmological") distances, implying that they must be tremendously powerful as the energy released during a burst lasting less than a second to a few minutes is more than that emitted by Sol during its entire lifetime of about 10 billion years.
	www.solstation.com /x-objects/grb000131.htm (2007 words)

	Gamma-ray Burst Real-time Sky Map
		They saw the GRB fade with time, but there was a ''large bump'' of emission in the middle of their exposure from an X-ray flare of some kind.
		This is the most distant GRB ever seen with a nebular spectrum.\n\nIn X-rays, this burst had a long, slow rise in brightness, and faded slowly-- it lasted for at least 3000 seconds as seen by Swift.
		GRBs 050507 A and B are most likely software glitches in the software for this page, and will be deleted once we trace the problem, and this real burst will be relabeled as GRB 050507A."], ["122", "GRB 050505A", "2005/05/05", "23:22:21", "Swift", "This was another long burst, lasting about a minute, with four distinct peaks.
	grb.sonoma.edu (18526 words)

	GRBlog: GRB060218A
		We observed the afterglow of GRB 060218 (Cusumano et al., GCN 4775; Marshall et al., GCN 4800) with the 2m RCC telescope at the National Astronomical Observatory Rozhen (Bulgaria) on Mar. 21 and 26.
		We have observed filed of GRB 060218 (sn 2006aj) for 133 min during night 24./25.2.2006 with the 40cmreflector at N. Copernicus Observatory equipped with ST-7 CCD (R band filter) camera.
		We imaged GRB 060218 with 70-cm telescope of Crimean Astrophysical observatory (Ukraine) and ST-7 camera of St.Petersburg University in photometric and polarimetric mode.
	grad40.as.utexas.edu /grblog.php?view=burst&GRB=20060218A (1028 words)

	GRBlog: A Gamma-Ray Burst Database
		We have analysed the Swift XRT data from the first orbit observation of GRB 060912 (Hurkett et al., GCN 5558), with a total exposure of 1.7 ks seconds.
		We have imaged the field of GRB 060912 with the TNT 0.8m telescope at Xinglong Observatory.The first image was taken at 13:57:23 U, 89s after the burst.
		GRB 060912: Swift detection of a burst with an optical afterglow
	grad40.as.utexas.edu /grblog.php (932 words)

	SPACE.com -- Strange Exploding Star Unlocks Supernova Secrets
		Astronomers also think the star that created GRB 060218 was on the lower end of the mass spectrum compared to most stars that go supernova.
		GRB 060218 occurred in a star-forming galaxy about 440 million light-years away towards the constellation Aries, making it the second-closest GRB ever detected.
		But with GRB 060218, astronomers got their first glimpse of the full evolution of a star's death, something that could prove invaluable for deciphering the mechanism behind both gamma-ray bursts and supernovas.
	www.space.com /scienceastronomy/060830_grb_supernova.html (835 words)

	GRBlog: GRB060218A
		GRB 060218 SN 2006aj: optical observations at Rozhen Observatory
		We observed the OT of GRB 060218/SN 2006aj (Cusumano et al.
		We obtained optical imaging of GRB 060218/SN 2006aj (Cusumano et al., GCN 4775) on 2006/March 3.958 (UT) using the IAG-USP 60cm telescope at the Laboratório Nacional de Astrofísica (LNA), Brazil.
	grad40.as.utexas.edu /grblog.php?view=burst&GRB=20060218A (1028 words)

	GRB 990510 and a Solar Wind Problem
		Keep in mind that the GRB radiation roared through the solar system from a point near the South celestial pole, and that most of the material density associated with the solar wind is concentrated near the solar system's equatorial plane.
		GRB 990510 illuminated the solar wind disk from a point near the direction of the Southern celestial pole.
		It appears that, based on energy considerations alone, GRB 990510 could have induced a total of about eight fission events in the square-centimeter column of height equal to one-half the thickness of the solar wind disk.
	www.datasync.com /~rsf1/vel/solwin.htm (2775 words)

	Gamma-ray Burst Real-time Sky Map (Site not responding. Last check: 2007-10-31)
		Even if this GRB turns out not to be at a large distance, it is still very odd and interesting.
		When a GRB occurs, the BAT will be the first of Swift's instruments to detect it.
		Second, if a GRB is discovered by another telescope, the coordinates can be uploaded to Swift so that it can perform rapid observations of these bursts.
	grb.sonoma.edu /details.php?id=293 (910 words)

	NASA - More on this page:
		GRBs are due to the collapse of massive stars, and are therefore expected to occur out to redshifts of about z = 20 (unlike QSOs or bright galaxies).
		Both GRBs and their afterglows are very bright, and are therefore easily observed out to z = 20 (unlike QSOs or galaxies).
		These leave their "fingerprints" on the light, telling astronomers about the history of the universe in a way that is analogous to the way that ice cores drilled deep into the Greenland ice cap tell us about the climatic history of the Earth.
	www.nasa.gov /vision/universe/starsgalaxies/2005_distant_grb.html (793 words)

	APOD Search Results for "GRB" (Site not responding. Last check: 2007-10-31)
		Short duration GRBs are thought by many to be fundamentally different than their long duration GRB cousins that are likely related to distant supernovas.
		GRB 021211, was identified by the orbiting HETE-2 satellite.
		The distance scale of GRBs was the topic of a historic debate in April 1995.
	antwrp.gsfc.nasa.gov /cgi-bin/apod/apod_search?GRB (4382 words)

	GRB 060218
		Given the proximity of this object to the reported XRT and UVOT positions for a candidate afterglow (Cusumano et al.
		GCN #4779), this should be considered a potential host galaxy of a low-redshift GRB.
		Mirabal (U. Michigan) reports on behalf of the MDM Observatory GRB follow-up team: "I observed the candidate optical afterglow of Swift GRB 060218 detected by the Swift UVOT (Cusumano et al.
	www.astro.columbia.edu /~jules/grb/060218 (199 words)

	Blasts from the Past
		The very large halo size is required to avoid an asymmetry in the GRB sky distribution caused by the fact that the Earth is offset from the center of the Galaxy, by about 25,000 light years.
		In the case of the other distance scale (referred to by astronomers as "cosmological") it is the smoothness of the GRB sky distribution that tells us that their distances must exceed the length scales over which the distribution of matter appears clumpy, i.e., larger than clusters and superclusters of galaxies, and the voids between them.
		When a GRB is found the WFC data are searched, and an accurate position can be determined, which is then quickly dispatched to astronomers around the world.
	science.nasa.gov /newhome/headlines/ast06may98_1.htm (2072 words)

	GRB 021211 observations with KAIT
		The GRB is in the red circle in all three images.
		The field of the GRB is superimposed upon the field of the supernova SN 2002he (a different part of the sky), because KAIT had been observing SN 2002he when the GRB alert arrived.
		The data show that the decay rate of the GRB changed at about t=12 minutes; from a rapid fading to a slower fading.
	astron.berkeley.edu /~saurabh/grb021211 (233 words)

	Chandra :: Photo Album :: GRB 031203 :: 04 Aug 04 (Site not responding. Last check: 2007-10-31)
		This illustration of a gamma-ray burst depicts GRB 031203, a burst that was discovered by the European Space Agency's Integral gamma-ray observatory on December 3, 2003.
		GRB 031203 is further evidence that the two types of explosions may be related.
		The discovery of GRB 031203, along with another intermediate energy gamma-ray burst, GRB 980425, should give astronomers valuable clues to the processes responsible for supernovas, fl hole formation, and gamma ray bursts.
	chandra.harvard.edu /photo/2004/grb031203 (303 words)

	ESA Science & Technology: INTEGRAL OMC Catches A GRB
		IBAS is a system for the real time detection of the GRB seen by the INTEGRAL satellite and the rapid distribution of their coordinates.
		Unfortunately this GRB occurred only a couple of arc minutes away from one of the brightest stars in the sky: Alpha Crucis; a magnitude 0.8 star and the 13th brightest in the night sky.
		The region where the GRB took place is severely affected by saturation by this very bright star.
	sci.esa.int /science-e/www/object/index.cfm?fobjectid=37676 (327 words)

	RXTE GRB Observations
		The 3 left-most columns (GRB) are the date and time of the start of the GRB and the BATSE Trigger Number (if also detected by BATSE).
		A sky map and time-series data plots are available at http://xte.mit.edu/crossbox/xbox_022/main.html Although the time-series data show no obvious peak of emission, the transmission function to the source location was such that we cannot exclude the presence of a peak.
		This is a revised position, using an updated analysis code that takes into account that this detection was made in SSC 3, a camera which has lost four of its eight resistive anodes, and has therefore very poor position resolution, if the boundary between two shadow patters falls on one of these dead anodes.
	gcn.gsfc.nasa.gov /gcn/rxte_grbs.html (4005 words)

	[No title]
		GRB shareholders, who include everyone in the world, define economics as the science that deals with the production, distribution and conservation of Earth's ecosystem wealth.
		The GRB produces ecocredit equal to the shareholder's valuation of Earth's ecosystem wealth, and issues' ecocredit as a global medium of exchange, a universal unit of account and a store of wealth.
		The GRB Capital Exchange Account is capitalized with 700 trillion ecocredits to be invested in ecosystem renewal and exchanged for national bank notes and government debt.
	www.grb.net (1353 words)

	ESA - Integral - Integral sees a GRB out of the corner of its eye
		When GRB 030406 exploded unexpectedly in early April this year, Integral was observing another part of the Universe, about 74 times the diameter of the full Moon away.
		IBIS can now see around corners because Marcinkowski realised that gamma rays from the most powerful GRBs would pass through the lead shielding on the side of the telescope, then through the first detector layer before coming to rest in the second layer.
		On 6 April 2003, his hunch was proved correct, Integral provided an accurate location for GRB 030406 even though it was not looking in the burst’s direction.
	www.esa.int /SPECIALS/Integral/SEMJLCAATME_0.html (627 words)

	GRB Entertainment: News
		TUCKERVILLE is produced for TLC by GRB Entertainment with executive producers Gary R. Benz and Michael Branton.
		GRB Entertainment is one of the world's leading producers and distributors of non-fiction programs.
		GRB distributes its own program catalog of more than 1,000 hours of original programming, in addition to representing international distribution rights for other non-fiction and entertainment producers.
	www.grbtv.com /news.aspx?newsID=12 (754 words)

	GRB Mediaworks
		GRB Media Works Records® is the recording label entity of the company.
		GRB Media Works is the proud sponsor of the performing arts award which was won by the newly crowned 2003 Miss Florida Caribbean Thea Duncan herself with her performance as...
		Directors, producers and talents alike trust GRB Media Works artistic integrity as well as its ingenuity in creating new land mark films...
	www.grbmediaworks.com (114 words)

	GRB Careers
		GRB has openings on its benefits administration team for Federal employee HR/benefits specialists.
		Applicants should have a minimum of 3+ years of current experience in preparing and processing Federal retirements and counseling Federal employees on CSRS/FERS, FEHB, FEGLI, and TSP benefits.
		GRB has openings on its training team for Federal employee HR/benefits instructors.
	www.grbinc.com /careers/default.aspx (131 words)

	GRB 000926
		We note that the colour of the OT, B-R=0.95+-0.05 (Halpern et al., GCN #824), is similar to that of the OT of GRB 000301C at z=2.04, B-R=0.91+-0.03 (Jensen et al., astro-ph/0005609).
		We conclude therefore that the decay slope of the afterglow is increasing.
		The redshift of GRB 000926 is likely to be z = 2.066 due to the high column density of this absorption system.
	www.astro.ku.dk /~brian_j/grb/grb000926 (1217 words)

	Online NewsHour: GRB 971214 -- May 14, 1998
		The team used NASA's Hubble Space Telescope and a host of satellites and was led by Professors Shrinivas Kulkarni and George Djorgovski of the California Institute of Technology.
		An image of the visible-light afterglow of the GRB 971214 burst, obtained with the W.M. Keck 10-meter telescope on Mauna Kea, Hawaii, indicated by the yellow arrow.
		Helfand emphasized that GRB 971214 is not directly related to the Big Bang.
	www.pbs.org /newshour/forum/may98/bang_5-14.html (397 words)

	SPACE.com -- Hubble Detects Gamma Ray Burst, Possible Parent Supernova
		At a mere 140 million light-years away, scientists say this GRB is the closest ever detected.
		The sighting of this supernova, in the exact same area of the sky, and just one day after the sighting of GRB 980425, intimates that the two phenomena may, in fact, be one and the same.
		This latest pairing, however, has provided scientists with an extra piece of evidence to support that its supernova, which is called 1998bw, did indeed come from the same source as GRB 980425.
	www.space.com /scienceastronomy/astronomy/gamma_ray_burst_000706.html (848 words)

	Astronomy - Clues about GRB hosts - Liz Kruesi
		The long GRBs are also located in their hosts' brightest regions, which implies they form from only the most massive stars — those more than 20 times our Sun's mass.
		Because long GRBs likely reside in older galaxies., these long GRBs can be used as tools to study the oldest galaxies, and, hence, the early universe.
		A nearby GRB of this type would cause severe damage to Earth's atmosphere, climate, and alter genetics.
	www.astronomy.com /asy/default.aspx?c=a&id=4305&r=rss (434 words)

	GRB Entertainment: The Edge Of Reality
		GRB Entertainment's Top-Rated Documentary Series "Intervention" Wins Highest Honor With The Presidential Prism Award
		GRB Entertainment Selected As Part Of Realscreen's Global 100 Most Influential Production Companies
		GRB Worldwide Signs Deal With BSKB For Distribution Rights to 14 Hours Of Sky One Original Programming
	www.grbtv.com (241 words)

	Astronomy - Short-GRB riddle answered - Liz Kruesi
		Short gamma-ray bursts (GRBs) are the result of two neutron stars merging or a fl hole eating a neutron star, say astrophysicists.
		By analyzing the afterglows, scientists found the GRBs lie between 2 and 3 billion light-years away, which is in the same distance range as GRB 050709.
		Compared to long GRBs, these short bursts are closer: 2 to 3 billion light-years compared to up to 13 billion light-years.
	www.astronomy.com /asy/default.aspx?c=a&id=3544 (702 words)

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