[vsnet-grb-info 5313] GRB 071025: SQIID JHK photometry

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7003
SUBJECT: GRB 071025: SQIID JHK photometry
DATE:    07/10/25 22:43:19 GMT
FROM:    Xiaohui Fan at U of Arizona  <fan at as.arizona.edu>

L. Jiang, F. Bian, X. Fan (Steward Observatory, University of Arizona)
reports:

Using the Simultaneous Quad Infrared Imaging Device (SQIID) on the Kitt
Peak Mayall 4-meter Telescope, we observed GRB 071025 in J, H, K bands
simultaneously, beginnig at UT 2007-10-25-05:56:59. With total exposure
time of 240 sec in all three bands, we clearly detected the afterglow.
Calibrated using local 2MASS sources, the object is at

 J=17.34 +/- 0.05
 H=16.37 +/- 0.05
 K=15.45 +/- 0.05

The photometric errors are dominated by the zeropoint uncertainties from our
 calibration procedure. The photon noise on the measuremens is <0.01.

The message may be cited.



-- 

Xiaohui Fan
Steward Observatory
The University of Arizona
933 N. Cherry Ave.
Tucson, AZ 85721-0065
Email: fan at as.arizona.edu

Tel: (520) 626-7558
Fax: (520) 621-1532
URL: http://sancerre.as.arizona.edu/~fan