[vsnet-grb-info 5243] GRB 20070521: Possible OT from Xinglong TNT observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  6936
SUBJECT: GRB 20070521: Possible OT from Xinglong TNT observation
DATE:    07/10/18 23:55:33 GMT
FROM:    L.P. Xin at NAOC  <xlp at bao.ac.cn>

L.P. Xin, M. Zhai, Y.L. Qiu, J.Y. Wei, J.Y. Hu, J.S. Deng, X.F Wang 
and W.K. Zheng on behalf of EAFON report:

We have imaged the field of GRB 071013 ( GCN 6932, GCN 6933) 
with the TNT 0.8m telescope at Xinglong Observatory started 
from 19:05:11.203 UT, about 0.435 days after the trager of the 
burst. A set of 15*600s R-band images were obtained, 
In our 15*600s combined image, we found two clear new objects
 at the position RA(J2000) = 10;58:11.3 Dec(J2000)=+53:50:56 and 
RA(J2000)= 10:58:21.459 Dec(J2000)=+53:51:09.85 within the error 
region of the BAT ( GCN 6933), based on the USNO-B1.0 
with uncertainties of 3" in both coordinates. respectively 

After psf photometry , we estimated that the magnitudes of 
the new two objects were about 21.49+-0.220, 21.46+-0.227  reletive to 
USNO-B1.0 stars. respectively, with the mean time 0.486 days after 
the burst

We could not confirm that which one of the two new objects was the OT
of the burst or maybe thay were not al all but one of them 
was possible to be.

We suggest new observations will be going .

More detailed analysis is on going!

The message my be cited