TITLE: GCN CIRCULAR NUMBER: 39317 SUBJECT: GRB 250213A: SVOM detection of a burst DATE: 25/02/14 00:57:43 GMT FROM: SVOM_group svomgroup@bao.ac.cn

Yun Wang (MPO), Wen-Jin Xie (NAOC), J.-L. Atteia (IRAP), N. Dagoneau (CEA), F. Piron (LUPM), Li Zhang (IHEP)

report on behalf of the SVOM mission team.

At 2025-02-13T23:46:24 UTC (Tb) SVOM/ECLAIRs triggered on the gamma-ray burst GRB 250213A (SVOM burst-id sb25021316). The following trigger information was received on the ground with low latency by the SVOM VHF Alert Network.

The burst was only detected by the Image Trigger (IMT), which produced a sequence of 2 alerts. IMT provided the alert with the best signal-to-noise-ratio (SNR) of 7.50 in the [8-50] keV energy band over a time window of 20.48 seconds starting at Tb.

The localization of the best alert is R.A., Dec 112.4888, -20.0967 degrees: RA (J2000) = 7h29m57.31s Dec (J2000) = -20d05m48.10s with a 90% C.L. radius of 10.46 arcmin (including systematic error of 2 arcmin added in quadrature).

A SVOM follow-up ToO observation has been scheduled.

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.

The Burst Advocate (BA) on shift for this burst is Yun Wang (wangyun@pmo.ac.cn) Please contact the BA by email if you require additional information regarding the SVOM follow-up of this burst.

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