GCN Circular 46269

Subject

GRB 261114A: SVOM/VT optical detection from VHF data

Event

GRB 261114A

Date

2026-11-14T11:22:26Z (18 hours ago)

Edited On

2026-11-14T20:05:58Z (9 hours ago)

From

SVOM_group <svomgroup@bao.ac.cn>

Edited By

K.L. Page at U Leicester <klp5@leicester.ac.uk> on behalf of SVOM_group <svomgroup@bao.ac.cn>

Via

Web form

C. Wu, H.L. Li, L. P. Xin, Y. L. Qiu (NAOC), J. T. Palmerio, Ziqi Wang (GXU), Wenjin Xie (NAOC) on behalf of the SVOM/VT team.

After the trigger by SVOM/ECLAIRs (sb26111401) at 2026-11-14T09:33:13 UTC (T0), SVOM performed an automatic slew on the burst location (Li et al., GCN 46267

). From a preliminary analysis of the 1-bit subimage and source list downloaded via VHF network, one credible candidate is identified, the details of which are presented below. The position of this candidate is R.A., Dec. 345.81339, -32.31699 degrees, corresponding to:

R.A. (J2000) = 23h03m15.21s
Dec. (J2000) = -32d19m01.2s

with an uncertainty of 0.50 arcsec. This candidate was detected in both VT_R and VT_B band of the VT observations. The candidate's magnitudes are:

date-obs (UTC)	mid-time - T0	exposure	VT_B mag(AB)	VT_R mag(AB)
2026-11-14T09:37:55	6.45 min	6*70 sec	19.54 +/- 0.02	18.09 +/- 0.01
2026-11-14T09:46:05.000	14.55 min	6*70 sec	20.10 +/- 0.04	18.54 +/- 0.03

Magnitudes were not corrected for Galactic reddening. The Space-based multi-band astronomical Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA), French Space Agency (CNES), and the Chinese Academy of Sciences (CAS), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. SVOM/VT was jointly developed by Xi'an Institute of Optics and Precision Mechanics (XIOPM), CAS and National astronomical observatories (NAOC), CAS.