GCN Circular 40672
Subject
GRB 250610B : SVOM/GWAC-F60A and F50 observations
Date
2025-06-10T18:53:15Z (2 days ago)
From
Weikang Zheng at UC Berkeley <weikang@berkeley.edu>
Via
email
J. Wang, W. L. Dong, L. P. Xin(NAOC), L. J. Chen(GXU), Y. G. Yang(HNU), X.
H. Han, C. WU, Y. L. Qiu, H. L. Li, X .M. Lu, R. S. Zhang, Y. Xu, L. Huang,
H. B. Cai, Y. J. Xiao, P. P. Zhang, L. Lan, W. J. Xie, Z. H. Yao, J. Y.
Wei(NAOC), X. G. Wang, E. W. Liang(GXU) and W. Zheng (UCB) report on behalf
of the SVOM follow-up team:
We observed the field of SVOM GRB 250610B (Saccardi et al., GCN 40671) with
the GWAC-F60A and GWAC-F50 at Xinglong Observatory, China. F60A started
observing at 2025-06-10T17:14:17.39 UTC with a set of 34 images in R-band.
F50 started observing at 2025-06-10T17:14:17.39 UTC and with a set of 9
images in R-band.
After coadding the images, we do not find any uncatalog candidate within
the SVOM/ECLAIRs error box. We estimate the upper limit of 16.0 mag for
GWAC-F60A at mid time of 54.5 minutes after brust, and upper limit of 17.5
mag for GWAC-F50 at mid time of 54.0 minutes after brust.
Two 60cm GWAC-F60(A/B) are operated by Guangxi University and NAOC, CAS, at
Xinglong Observatory, China. The field of view is 19*19 arcmin. The 50cm
telescope (F50A) is operated by Huaibei Normal University and NAOC, CAS, at
Xinglong Observatory, China. The field of view is 27*27 arcmin.