GCN Circular 938

GRB010214 Optical Observation

J. Zhu, S. J. Xue, on behalf of the Beijing Astronomical Observatory GRB 
team, report:

"The 58 x 58 arcmin area centered at the BeppoSAX WFC error circle of
GRB010214 (G. Gandolfi, GCN #933
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 ) were imaged on Feb. 14 between 16:48 UT
to 17:29 UT and 19:02 UT to 21:53 UT (8 to 13 hours after the burst)
with the BAO 0.6/0.9-m Schmidt telescope. Image information is as
followes:

No     Image Name      start time exposure   Filter  Notes
                          (UT)    (seconds)
-- -------------------- ---------- --------- ------- --------------
01 p1751955MG01i039.fit 16:47:45.0  600       BATC-i star elongated
02 p1751955MG01i040.fit 17:01:25.0  300       BATC-i
03 p1751955MG01i041.fit 17:09:13.0  300       BATC-i
04 p1751955MG01i042.fit 17:16:44.0  300       BATC-i
05 p1751955MG01i043.fit 17:24:00.0  300       BATC-i
06 p1751955MG01i047.fit 19:02:16.0 1200       BATC-i
07 p1751955MG01i048.fit 19:24:31.0 1200       BATC-i
08 p1751955MG01n050.fit 20:24:59.0 1200       BATC-n
09 p1751955MG01n051.fit 20:47:26.0 1200       BATC-n
10 p1751955MG01n052.fit 21:10:03.0 1200       BATC-n
11 p1751955MG01n053.fit 21:32:59.0 1200       BATC-n

There were no guiding for images (01)-(05) and the first image had very
bad tracing for the low pointing direction of the telescope. The filters 
used were BATC-i (6660A +/- 240A) and BATC-n (8480A +/- 75A).

Visual comparison of the BeppoSAX WFC error circle area for the combined 
image of (06) and (07) (detection limit about R=20) and the combined image 
of (08)-(11) with the DSS2 red image shows no afterglow candidate.

There is a faint object only appeared in image (2) at RA(2000)=17:40:57.68,
Dec(2000)=+48:33:58.3, with R=19.1 (comparison star: RA=17:41:01.76, Dec=
+48:33:13.7, R=15.6). It was not bad pixel or ghost image. But the 
possibility of cosmic ray could not be excluded completely. Observations
with large telescope might be necessary.

The central part of the image (2) could be found at
http://vega.bac.pku.edu.cn/~zj/grb/grb010214/p1751955MG01i040.gif

This report may be cited."

-- 
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Jin Zhu                          | Tel.:  +86-10-62751286 (O)
Beijing Astronomical Observatory |        +86-314-5520267 (Schmidt dome)
Chinese Academy of Sciences      | Pager: +86-10-96301682333
P. R. China                      | Fax :  +86-10-62765031
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Room 2919, No. 2 Science Building, CAS-PKU Beijing Astrophysics Center,
Peking University, Beijing 100871, P. R. CHINA.
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email: zj@bac.pku.edu.cn                  http://vega.bac.pku.edu.cn/~zj
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