Castro-Tirado, A. J. ; Sagar, R. ; et., al. (1999) Decay of the GRB 990123 optical afterglow: implications for the fire- ball model Science, 283 (54). pp. 2069-2073. ISSN 0036-8075
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Official URL: http://www.sciencemag.org/content/283/5410/2069.sh...
Related URL: http://dx.doi.org/10.1126/science.283.5410.2069
Abstract
Broad-band (ultraviolet to near-infrared) observations of the intense gamma ray burst GRB 990123 started ~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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Association for the Advancement of Science. |
| ID Code: | 91803 |
| Deposited On: | 24 May 2012 07:29 |
| Last Modified: | 24 May 2012 07:29 |
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