[vsnet-grb-info 4349] GRB 070223: Optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  6136
SUBJECT: GRB 070223: Optical observations
DATE:    07/02/23 23:53:25 GMT
FROM:    Alok Chandra Gupta at Nat. Astro. Obs./Yunnan Obs  <alok at ynao.ac.cn>

TITLE:   GCN CIRCULAR
NUMBER:  1
GRB 070223: Optical observations
DATE: 07/02/23 23:50:00 GMT
From: Alok C. Gupta at Nat. Astro. Obs./Yunnan Obs  <alok at ynao.ac.cn>

A. C. Gupta
National Astronomical Observatories/Yunnan Observatory 
CAS, P.O. Box 110, Kunming, Yunnan 650011, China

We observed the field of GRB 070223 (GCN 6125) with CCD detector 
at our 1.02 meter telescope of the Yunnan observatory, Kunming, 
China. We started our observation on Feb. 23, 2006 at UT 13:21:20.
We took 5 image frames of 200 seconds exposure time of each in
the optical R passband. There is no detection of optical afterglow
candidate in our combined 5 images. The 5-sigma limiting magnitude 
of our observations is R ~ 20.0 mag.