Mason, KO;
Blustin, AJ;
Boyd, P;
Holland, ST;
Page, MJ;
Roming, P;
Still, M;
... Schady, P; + view all
(2006)
Prompt optical observations of GRB 050319 with the Swift UVOT.
ASTROPHYS J
, 639
(1)
311 - 315.
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Abstract
The UVOT telescope on the Swift observatory has detected optical afterglow emission from GRB 050319. The flux declined with a power-law slope of alpha = -0.57 between the start of observations some 230 s after the burst onset (90 s after the burst trigger) until it faded below the sensitivity threshold of the instrument after similar to 5 x 10(4) s. There is no evidence for the rapidly declining component in the early light curve that is seen at the same time in the X-ray band. The afterglow is not detected in UVOT shortward of the B band, suggesting a redshift of about 3.5. The optical V-band emission lies on the extension of the X-ray spectrum, with an optical-to-X-ray slope of beta = 0.8. The relatively flat decay rate of the burst suggests that the central engine continues to inject energy into the fireball for as long as a few x 10(4) s after the burst.
| Type: | Article |
|---|---|
| Title: | Prompt optical observations of GRB 050319 with the Swift UVOT |
| Open access status: | An open access version is available from UCL Discovery |
| Keywords: | astrometry, galaxies : distances and redshifts, gamma rays : bursts, shock waves, X-rays : individual (GRB 050319), GAMMA-RAY BURST, INFRARED-EMISSION, REVERSE SHOCK, AFTERGLOW, TELESCOPE, RADIATION, MISSION |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/9733 |
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