GRB 051111A
GCN Circular 4262
Subject
GRB 051111A : R-band temporal decay index based on Lulin
Date
2005-11-11T16:06:28Z (20 years ago)
From
Yuji Urata at RIKEN <urata@crab.riken.go.jp>
GRB 051111A : R-band temporal decay index based on Lulin observations
F.Y. Huang, K.Y. Huang, W.H. Ip (NCU), Y. Urata(RIKEN),
Y. Qiu (BAO), Y.Q. Lou (THCA) on behalf of EAFON report:
"We have observed the optical afterglow of GRB 051111 (GCN # 4247,
4248) using the Lulin 1m telescope with BVRI band filters between
10:07 UT and 14:54 UT on Nov 11 2005. Combine with our previous
preliminary result (GCN # 4258), the R-band light curve shows shallow
decay. When we fit all our R-band data with single power-law the
temporal index is determined as alpha~-0.6.
Further analysis is in progress."
This message may be cited.
GCN Circular 4258
Subject
GRB 051111A : Lulin BVRI multi band afterglow observation
Date
2005-11-11T11:40:53Z (20 years ago)
From
Yuji Urata at RIKEN <urata@crab.riken.go.jp>
GRB 051111A : Lulin BVRI multi band afterglow observation
F.Y. Huang, K.Y. Huang, W.H. Ip (NCU), Y. Urata(RIKEN),
Y. Qiu (BAO), Y.Q. Lou (THCA) on behalf of EAFON report:
" We started BVRI multi band imaging of the GRB 051111A afterglow using
Lulin 1-m telescope at 10:07 UT (4.1 h after the burst). We detected
the optical afterglow clearly in each band. Preliminary analysis of
the R-band image taken at 4.4 h after the burst with 300s exposure
yields R=19.2.
Further observation and analysis are in progress."
This message may be cited.
GCN Circular 4257
Subject
GRB051111a: SARA Observations
Date
2005-11-11T10:31:34Z (20 years ago)
From
Autumn Homewood at Clemson U <ahomewo@clemson.edu>
Kiran Garimella, Autumn Homewood, and Dieter Hartmann report on behalf of
the Clemson GRB Follow-Up Team:
We began observations in R-Band at UT 20051111 07:04:38, approximately 1
hour after the Swift Trigger (GCN 4248). We detect the OT reported by
ROTSE-III (GCN 4247). Preliminary analysis of the raw data yields R = 18.3
+/- 0.2 mag, based on stacked images with a total exposure time of 50
minutes. Images were calibrated using USNO B1.0 catalog. Analysis is
ongoing.
This message may be cited.
SARA Homepage: www.saraobservatory.org
Clemson GRB Follow-Up Homepage: http://people.clemson.edu/~kgarime/burst
GCN Circular 4256
Subject
GRB 051111a: IR photometry
Date
2005-11-11T09:48:19Z (20 years ago)
From
Josh Bloom at UC Berkeley <jbloom@astron.berkeley.edu>
J. S. Bloom, on behalf of a larger collaboration, reports:
"As the poor transmission conditions (i.e. clouds) at Mt. Hopkins
improved, we managed to obtain a total imaging exposure of 188
seconds on the field of GRB 051111a (GCN 4248) before hitting a
telescope limit. In simultaneous observations with PAIRITEL (*) we
measure magnitudes of the Rujopakarn transient (GCN 4247) of:
J = 16.55 � 0.03, H = 15.85 � 0.04 and Ks = 15.29 � 0.06
from 2005-11-11 07:23:29 to 2005-11-11 07:28:26 UTC. A color
composite image may be found at:
http://astro.berkeley.edu/~jbloom/grb051111a.gif
This message may be cited."
(*) http://pairitel.org
GCN Circular 4254
Subject
GRB 051111A: KAIT optical observations
Date
2005-11-11T07:23:14Z (20 years ago)
From
Weidong Li at UC Berkeley KAIT/LOSS <weidong@astron.berkeley.edu>
W. Li, University of California, Berkeley, on behalf of the
KAIT GRB team, report:
The robotic 0.76-m Katzman Automatic Imaging Telescope (KAIT)
at Lick Observatory observed GRB051111 detected with Swift
(Trigger 163438; Sakamoto et al. GCN 4248). A series of
images was automatically obtained starting at 06:00:25 UT
(44s after the burst). The sequence includes a combination of
images taken with the V and I filters, as well as some that
are unfiltered. The OT identified by W. Rujopakarn et al. (GCN
4247) was detected with the following unfiltered magnitudes
(calibrated to USNO B1.0):
UT Start EXP time R mag delta R
06:00:25 15 s 13.40 0.05
06:01:46 20 s 14.32 0.05
Observations and analysis are continuing.
GCN Circular 4253
Subject
GRB 051111a: Afterglow fading in Ic
Date
2005-11-11T07:15:17Z (20 years ago)
From
Ken ichi Torii at RIKEN <torii@ess.sci.osaka-u.ac.jp>
K. Torii (Osaka U.) reports:
The error region of GRB 051111a (Sakamoto et al., GCN 4248) was
observed by the 0.3 m telescope in the New Mexico Skies
Observatory. Starting at 06:05:50 UT (382 s after the burst), 120 s
exposures in Ic band was repeated.
We confirm the presence of the bright afterglow (Rujopakarn et al.,
GCN 4247) and its fading. Between 06:07 UT and 06:36 UT, the
afterglow faded by about 1.7 mag in Ic band.
===
GCN Circular 4247
Subject
GRB 051111A: ROTSE-III Detection of Possible Counterpart
Date
2005-11-11T06:08:00Z (20 years ago)
From
Wiphu Rujopakarn at U Michigan/ROTSE <wiphu@umich.edu>
W. Rujopakarn (U Mich), H. Swan (U Mich), E.S. Rykoff (U Mich), B. Schaefer
(Louisiana State), report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB 051111A
(Swift trigger 163438). The first image was at 06:00:08.4 UT, 26.9 s after
the burst (6.4 s after the GCN notice time). The unfiltered images are
calibrated relative to USNO A2.0. We detect a new object, not visible in the
DSS (second epoch), with coordinates:
23:12:33.2 +18:22:29.1 (J2000)
start UT mag mlim(of image)
----------------------------------
06:00:08.4 13.0 15.6
Continuing observations are in progress.