TITLE:   GCN CIRCULAR
NUMBER:  43721
SUBJECT: GRB 260211A: EP-FXT follow-up observation
DATE:    26/02/13 14:06:23 GMT
FROM:    EP Team at NAOC/CAS <ep_ta@bao.ac.cn>

R.D. Liang, M. J. Liu (NAOC), H. Z. Wu (HUST), H. Sun (NAOC) on behalf of the Einstein Probe (EP) team:

EP-FXT performed a follow-up observation of the SVOM/ECLAIRs-detected burst GRB 260211A (SVOM/sb26021102, Gotz et al., GCN 43705) at 2026-02-11 21:16:34 (UTC), about 52 minutes after the SVOM/ECLAIRs trigger, with an exposure time of 4569 s. Two uncataloged sources are detected within the ECLAIRs error circle. Preliminary analysis on these sources is automatically conducted, and the details are listed as follows. 

EPF_J054755.7-002705
RA (J2000): 86.9816
Dec (J2000):  -0.4505
Flux: 1.2432 x 10^-12 erg/s/cm2 (observed, 0.5-10 keV)
Flux_err: 2.2401 x 10^-13 erg/s/cm2 (1 sigma)

EPF_J054802.6-002834
RA (J2000): 87.0127
Dec (J2000): -0.4750
Flux: 3.1645 x 10^-13 erg/s/cm2 (observed, 0.5-10 keV)
Flux_err: 4.0267x 10^-14 erg/s/cm2 (1 sigma)

Note that the position of the second candidate is consistent with a known X-ray source 1eRASS J054803.1-002833. 

Launched on January 9, 2024, EP is a space X-ray observatory to monitor the soft X-ray sky with X-ray follow-up capability (Yuan et al. 2022, Handbook of X-ray and Gamma-ray Astrophysics).