Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 7062

GRB 071112C: Optical and NIR afterglows observed with KANATA
2007-11-12T20:07:47Z (17 years ago)
Makoto Uemura at Hiroshima U <>
M. Uemura, M. Sasada, A. Arai, and T. Uehara (Hiroshima Univ.), 
report on behalf of the KANATA GRB team:

  We performed optical-NIR observations of the field of 
GRB 071112C (GCN Circ. 7059) with TRISPEC attached to 
the "KANATA" 1.5-m telescope.  

  We found a fading object at the position of the optical 
afterglow detected with UVOT.  
Our preliminary results are below:

time(UT)       mag.              exposure_time
Nov. 2007                        (sec)
12.77880       17.76 +/- 0.14 V  30sec * 10
12.77911       16.39 +/- 0.22 J  25sec * 9
12.78674       18.66 +/- 0.20 V  123sec * 5
12.78672       17.16 +/- 0.17 J  120sec * 5

Comparison star: 
V-band: GSC2.3 02:36:55.72 +28:21:03.7 V=14.15
J-band: 2MASS  02:36:55.72 +28:21:03.7 J=12.674
The large errors of magnitudes are due to the rapidly 
fading trend of the afterglow. 
Further observation and analysis are ongoing.
Looking for U.S. government information and services? Visit