TITLE: GCN CIRCULAR NUMBER: 44086 SUBJECT: GRB 260321A: EP-FXT follow-up observation DATE: 26/03/23 03:51:16 GMT FROM: EP Team at NAOC/CAS <ep_ta@bao.ac.cn> Z.-C. Zou, Y. H. Jiang (NJU), J. P. Chen (SYSY), Y. J. Yi (BNU) on behalf of the Einstein Probe (EP) team: EP-FXT performed a follow-up observation of the SVOM/ECLAIRs-detected burst GRB 260321A (SVOM/sb26032123; Brunet et al., GCN 44071) starting at 2026-03-22T15:23:32 UTC, approximately 21 hours after the SVOM trigger, with a total exposure time of 4565 s. Four 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_J143847.8+314542 RA (J2000): 219.6990 Dec (J2000): 31.7616 Flux: 9.265 x 10^-14 erg/s/cm2 (observed, 0.5-10 keV) Flux_err: 3.498 x 10^-14 erg/s/cm2 (1 sigma) EPF_J143759.7+314425 RA (J2000): 219.4989 Dec (J2000): 31.7404 Flux: 2.9252 x 10^-14 erg/s/cm2 (observed, 0.5-10 keV) Flux_err: 1.2651 x 10^-14 erg/s/cm2 (1 sigma) EPF_J143833.9+314628 RA (J2000): 219.6440 Dec (J2000): 31.7719 Flux: 5.9349 x 10^-14 erg/s/cm2 (observed, 0.5-10 keV) Flux_err: 2.0193 x 10^-14 erg/s/cm2 (1 sigma) EPF_J143845.7+313613 RA (J2000): 219.6902 Dec (J2000): 31.6037 Flux: 8.0698 x 10^-14 erg/s/cm2 (observed, 0.5-10 keV) Flux_err: 1.9625 x 10^-14 erg/s/cm2 (1 sigma) 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). View this GCN Circular online at https://gcn.nasa.gov/circulars/44086. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...