[vsnet-grb-info 3437] GRB060614: Optical observations

Sun Jun 18 23:42:27 JST 2006

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5272
SUBJECT: GRB060614: Optical observations
DATE:    06/06/18 14:41:30 GMT
FROM:    Johan U. Fynbo at U.Copenhagen  <jfynbo at astro.ku.dk>

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Christina C. Thoene, Johan P.U. Fynbo, Brian L. Jensen, J. Hjorth, D. Xu
(DARK Cosmology Centre), Uffe G.  Joergensen, Kristian Woller
(NBI Copenhagen) report:

We observed the OT of GRB060614 (GCN 5252) with the Danish 1.54m  
telescope and
DFOSC on La Silla in the R-band at several epochs on June 15-18. A  
fit to our
data leads to a powerlaw decay with a temporal decay index of 1.50.  
Compared to
other data reported in the GCNs is seems that the afterglow in the R- 
band had a rising
lightcurve during the first about 12 hours after the burst and then  
started the
more regular powerlaw decay. In this way the burst qualitatively  
resemples
GRB970508 (Pedersen et al. 1998, ApJ 496, 311).

A plot of the data and fit is available at:
http://www.astro.ku.dk/~brian_j/grb/grb060614/

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P.U. Fynbo, Brian L. Jensen, J. Hjorth, D. Xu</DIV><DIV>(DARK Cosmology =
Centre), Uffe G.=A0 Joergensen, Kristian Woller</DIV><DIV>(NBI =
Copenhagen) report:</DIV><DIV><BR =
class=3D"khtml-block-placeholder"></DIV><DIV>We observed the OT of =
GRB060614 (GCN 5252) with the Danish 1.54m telescope and</DIV><DIV>DFOSC =
on La Silla in the R-band at several epochs on June 15-18. A fit to =
our</DIV><DIV>data leads to a powerlaw decay with a temporal decay index =
of 1.50. Compared to</DIV><DIV>other data reported in the GCNs is seems =
that the afterglow in the R-band had a rising</DIV><DIV>lightcurve =
during the first about 12 hours after the burst and then started =
the</DIV><DIV>more regular powerlaw decay. In this way the burst =
qualitatively resemples</DIV><DIV>GRB970508 (Pedersen et al. 1998, ApJ =
496, 311).</DIV><DIV><BR class=3D"khtml-block-placeholder"></DIV><DIV>A =
plot of the data and fit is available at:</DIV><DIV style=3D"text-align: =
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href=3D"http://www.astro.ku.dk/~brian_j/grb/grb060614/">http://www.astro.k=
u.dk/~brian_j/grb/grb060614/</A></SPAN></FONT></DIV><DIV =
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