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- GRB_990123 abstract "GRB 990123 is a gamma-ray burst which was detected on January 23, 1999. It was the first GRB for which a simultaneous optical flash was detected. Astronomers first managed to obtain a visible-light image of a GRB as it occurred on January 23, 1999, using the ROTSE-I telescope in Los Alamos, New Mexico. The ROTSE-I was operated by a team under Dr. Carl Akerlof of the University of Michigan and included members from Los Alamos National Laboratory and Lawrence Livermore National Laboratory. The robotic telescope was fully automated, responding to signals from NASA's BATSE instrument aboard the Compton Gamma Ray Observatory within seconds, without human intervention. In the dark hours of the morning of January 23, 1999, the Compton satellite recorded a gamma-ray burst that lasted for about a minute and a half. There was a peak of gamma and X-ray emission 25 seconds after the event was first detected, followed by a somewhat smaller peak 40 seconds after the beginning of the event. The emission then fizzled out in a series of small peaks over the next 50 seconds, and eight minutes after the event had faded to a hundredth of its maximum brightness. The burst was so strong that it ranked in the top 2% of all bursts detected.Compton reported the burst to its ground control facility at NASA Goddard Space Flight Center in Maryland the moment it began, and Goddard immediately sent the data out over the "gamma-ray Burst Coordinates Network (GCN)". While Compton, as mentioned, could not provide precise locations of bursts, the location was good enough for the wide-field ROTSE-I. The camera array automatically focused on the region of the sky and obtained an image of the burst 22 seconds after it was detected by Compton, with subsequent images obtained every 25 seconds after that.ROTSE-I could image cosmic objects as faint as magnitude 16, and GRB hunters had expected the visible component of a GRB to be very faint. Instead, the visible component reached magnitude 9. It was so bright that it could have been seen by an amateur astronomer with good binoculars. The object that produced it increased in brightness by a factor of 4,000 in less than a minute.Because ROTSE-I operated automatically (while its creators slept) the news of ROTSE-I's accomplishment didn't make it out on the networks until later in the day, and in the meantime other observatories were focusing on the event, by then designated "GRB 990123".The BeppoSAX satellite had also seen the burst, and pinned down its location to within a few arcminutes. This data was sent out, and four hours after the burst the area was imaged with the 1.52 meter (60 inch) Schmidt camera at Palomar Mountain in California. The image revealed a magnitude 18 optical transient that wasn't on archive images of the same area.The next night, the fading object, by now down to magnitude 20, was imaged by the Keck telescope, and the 2.6 meter Nordic Optical Telescope in the Canary Islands. The observations revealed absorption lines with a redshift of 1.6, implying a distance of 9 billion light-years.The Hubble Space Telescope performed observations on the location of GRB 990123, sixteen days after the event. It had faded by more than a factor of three million in that time. The Hubble was able to pick up the traces of a faint galaxy, whose blue color suggested it was forming new stars at a rapid rate.".
- GRB_990123 thumbnail Gammarayburst-GRB990123.jpeg?width=300.
- GRB_990123 wikiPageID "22685127".
- GRB_990123 wikiPageLength "6130".
- GRB_990123 wikiPageOutDegree "33".
- GRB_990123 wikiPageRevisionID "661008192".
- GRB_990123 wikiPageWikiLink 10_yottametres.
- GRB_990123 wikiPageWikiLink 1_E+25_m.
- GRB_990123 wikiPageWikiLink Apparent_magnitude.
- GRB_990123 wikiPageWikiLink BeppoSAX.
- GRB_990123 wikiPageWikiLink Binoculars.
- GRB_990123 wikiPageWikiLink CGRO.
- GRB_990123 wikiPageWikiLink California.
- GRB_990123 wikiPageWikiLink Canary_Islands.
- GRB_990123 wikiPageWikiLink Carl_Akerlof.
- GRB_990123 wikiPageWikiLink Category:Astronomical_objects_discovered_in_1999.
- GRB_990123 wikiPageWikiLink Category:Compton_Gamma_Ray_Observatory.
- GRB_990123 wikiPageWikiLink Category:Long-duration_gamma-ray_bursts.
- GRB_990123 wikiPageWikiLink Compton_Gamma_Ray_Observatory.
- GRB_990123 wikiPageWikiLink GRB_050509B.
- GRB_990123 wikiPageWikiLink Galaxy.
- GRB_990123 wikiPageWikiLink Gamma-ray_burst.
- GRB_990123 wikiPageWikiLink Goddard_Space_Flight_Center.
- GRB_990123 wikiPageWikiLink Hubble_Space_Telescope.
- GRB_990123 wikiPageWikiLink Lawrence_Livermore_National_Laboratory.
- GRB_990123 wikiPageWikiLink Light.
- GRB_990123 wikiPageWikiLink Light-year.
- GRB_990123 wikiPageWikiLink Los_Alamos_National_Laboratory.
- GRB_990123 wikiPageWikiLink Maryland.
- GRB_990123 wikiPageWikiLink Minute_and_second_of_arc.
- GRB_990123 wikiPageWikiLink Minute_of_arc.
- GRB_990123 wikiPageWikiLink Nordic_Optical_Telescope.
- GRB_990123 wikiPageWikiLink Palomar_Mountain.
- GRB_990123 wikiPageWikiLink Parsec.
- GRB_990123 wikiPageWikiLink Robotic_Optical_Transient_Search_Experiment.
- GRB_990123 wikiPageWikiLink Science_(journal).
- GRB_990123 wikiPageWikiLink University_of_Michigan.
- GRB_990123 wikiPageWikiLink Visible_light.
- GRB_990123 wikiPageWikiLink File:Gammarayburst-GRB990123.jpeg.
- GRB_990123 wikiPageWikiLinkText "GRB 990123".
- GRB_990123 wikiPageWikiLinkText "Gamma ray burst 990123".
- GRB_990123 appmagV "20.6".
- GRB_990123 caption "--01-23".
- GRB_990123 detected "1999-01-23".
- GRB_990123 detectedBy BeppoSAX.
- GRB_990123 distLy "9".
- GRB_990123 hasPhotoCollection GRB_990123.
- GRB_990123 name "GRB 990123".
- GRB_990123 wikiPageUsesTemplate Template:Cite_journal.
- GRB_990123 wikiPageUsesTemplate Template:Infobox_GRB.
- GRB_990123 wikiPageUsesTemplate Template:Reflist.
- GRB_990123 z "1.6".
- GRB_990123 subject Category:Astronomical_objects_discovered_in_1999.
- GRB_990123 subject Category:Compton_Gamma_Ray_Observatory.
- GRB_990123 subject Category:Long-duration_gamma-ray_bursts.
- GRB_990123 hypernym Burst.
- GRB_990123 type Star.
- GRB_990123 type Burst.
- GRB_990123 type Object.
- GRB_990123 comment "GRB 990123 is a gamma-ray burst which was detected on January 23, 1999. It was the first GRB for which a simultaneous optical flash was detected. Astronomers first managed to obtain a visible-light image of a GRB as it occurred on January 23, 1999, using the ROTSE-I telescope in Los Alamos, New Mexico. The ROTSE-I was operated by a team under Dr. Carl Akerlof of the University of Michigan and included members from Los Alamos National Laboratory and Lawrence Livermore National Laboratory.".
- GRB_990123 label "GRB 990123".
- GRB_990123 sameAs انفجار_أشعة_جاما_990123.
- GRB_990123 sameAs m.05m6qt.
- GRB_990123 sameAs Q4118147.
- GRB_990123 sameAs Q4118147.
- GRB_990123 sameAs GRB_990123.
- GRB_990123 wasDerivedFrom GRB_990123?oldid=661008192.
- GRB_990123 depiction Gammarayburst-GRB990123.jpeg.
- GRB_990123 isPrimaryTopicOf GRB_990123.