GCN Circular 46035
C. Wu (NAOC), J. T. Palmerio (CEA/Irfu), A. Saccardi, D. Turpin (CEA/Irfu), Y. L. Qiu, L. P. Xin (NAOC), Chenwei Wang (IHEP) on behalf of the SVOM/VT team.
After the trigger by SVOM/ECLAIRs (sb26102601) at 2026-10-26T06:09:37 UTC (T0), SVOM performed an automatic slew on the burst location (Goto et al., GCN 46030).
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. 337.35317 27.02623 degrees, corresponding to:
R.A. (J2000) = 22h29m24.76s
Dec. (J2000) = +27d01m34.4s
with an uncertainty of 0.50 arcsec. This location is consistent with the optical afterglow reported by Dornic et al.(GCN 46033).
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 | exposure | VT_B mag(AB) | VT_R mag(AB) |
|---|---|---|---|---|
| 2026-10-26T06:19:39 | 12.53 min | 6*50 sec | 19.47 ± 0.02 | 18.70 ± 0.01 |
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.