Publication Date:
1999-03-26
Description:
Broad-band (ultraviolet to near-infrared) observations of the intense gamma ray burst GRB 990123 started approximately 8.5 hours after the event and continued until 18 February 1999. When combined with other data, in particular from the Robotic Telescope and Transient Source Experiment (ROTSE) and the Hubble Space Telescope (HST), evidence emerges for a smoothly declining light curve, suggesting some color dependence that could be related to a cooling break passing the ultraviolet-optical band at about 1 day after the high-energy event. The steeper decline rate seen after 1.5 to 2 days may be evidence for a collimated jet pointing toward the observer.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Castro-Tirado -- Zapatero-Osorio -- Caon -- Cairos -- Hjorth -- Pedersen -- Andersen -- Gorosabel -- Bartolini -- Guarnieri -- Piccioni -- Frontera -- Masetti -- Palazzi -- Pian -- Greiner -- Hudec -- Sagar -- Pandey -- Mohan V -- Yadav -- Nilakshi -- Bjornsson -- Jakobsson -- Burud I -- et -- New York, N.Y. -- Science. 1999 Mar 26;283(5410):2069-73.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Instituto de Astrofisica de Andalucia, IAA-CSIC, Granada, Spain. Instituto de Astrofisica de Canarias, La Laguna, Tenerife, Spain. Astronomical Observatory, University of Copenhagen, Copenhagen, Denmark. Nordic Optical Telescope, La Palma, T.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10092226" target="_blank"〉PubMed〈/a〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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