July 2025 - vsnet-grb-info - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-grb-info 39150] EP250702a / GRB 250702B,D,E: Hubble Space Telescope Observations
by GCN Circulars 15 Jul '25

15 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41096 SUBJECT: EP250702a / GRB 250702B,D,E: Hubble Space Telescope Observations DATE: 25/07/15 12:48:10 GMT FROM: Andrew Levan at Radboud University <a.levan(a)astro.ru.nl> EP250702a / GRB 250702BD,D,E: Hubble Space Telescope Observations A. J. Levan (Radboud and Warwick), A. Martin-Carrillo (UCD), P. G. Jonker (Radboud), D. B. Malesani (DAWN/NBI and Radboud Univ.), A. Saccardi (CEA/Irfu), P. O’Brien (Univ. of Leicester), R. A. J. Eyles-Ferris (Univ. of Leicester), A. de Ugarte Postigo (LAM), G. Corcoran (UCD), S. D. Vergani (LUX-Paris Obs.), N. R. Tanvir (U. Leicester), B. P. Gompertz (U. Birmingham) report for the Stargate collaboration: We observed the location of EP250702a / GRB 250702B,D,E (Cheng et al., GCNs 40906, 40917; Fermi GBM Team, GCNs 40883, 40886, 40890; DeLaunay et al., GCN 40903; Frederiks et al., GCN 40914) with the Hubble Space Telescope on 15 July 2025. A total of 2196 s of observations were obtained using WFC3 and the F160W (broad-band H) filter. At the location of the infrared counterpart (Martin-Carrillo et al., GCN 40924; Levan et al., GCN 40961) we clearly resolve a galaxy, whose nucleus is offset 0.7” from the transient location. The galaxy has an edge-on morphology, and either a disturbed disc or prominent dust lane. The transient lies on the stellar field of this galaxy, and the low probability of chance alignment (0.05%: Levan et al., GCN 40961) strongly implies that EP250702a / GRB 250702BDE is indeed an extragalactic transient. A weak excess of emission over the smooth disc is present at the transient location, but it appears likely the flux is now dominated by galaxy light. If extragalactic in origin the very long duration of the outburst is extremely unusual. Only relativistic TDEs have been seen to have such long-lived emission in gamma-rays. However, the non-nuclear nature of the transient is not in keeping with the expected location of a supermassive black hole, although is consistent with the expectations for white-dwarf - intermediate mass black hole disruptions. We thank Bill Januszewski, Joel Green, Claus Leitherer and Jennifer Lotz for their rapid work in approving and scheduling these observations. View this GCN Circular online at https://gcn.nasa.gov/circulars/41096. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 39149] GRB 250702B,D,E / EP250702a: H.E.S.S. very-high-energy gamma-ray observations
by GCN Circulars 15 Jul '25

15 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41095 SUBJECT: GRB 250702B,D,E / EP250702a: H.E.S.S. very-high-energy gamma-ray observations DATE: 25/07/15 09:19:06 GMT FROM: Mathieu de Naurois at Laboratoire Leprince Ringuet, CNRS, Deputy Director of the H.E.S.S. Collaboration <denauroi(a)in2p3.fr> The H.E.S.S. array of imaging atmospheric Cherenkov telescopes conducted follow-up observations of the transient EP250702a, at the localization provided by the EP-WXT (Cheng et al., GCN 40906). H.E.S.S. observed this source position for a total of 6 hours over 4 consecutive nights, starting on 2025-07-04, under fairly good observing conditions. A preliminary off-site analysis shows no evidence for a significant signal in either the full dataset or the four nights individually, consistent with the non-detection reported by the LST-1 and MAGIC telescopes (Paneque et al., GCN 41067). Our upper limits are expected to be compatible with the H.E.S.S. sensitivity curves (e.g., Fig. 6 of https://doi.org/10.22323/1.236.0847), scaled to the observation duration. The observations took place during the following times: 2025-07-04, 00:06 - 03:01 UTC 2025-07-05, 00:48 - 02:19 UTC 2025-07-06, 01:41 - 03:08 UTC 2025-07-07, 02:36 - 03:00 UTC H.E.S.S. is an array of five imaging atmospheric Cherenkov telescopes that detects very-high-energy gamma rays (>100 GeV) and is located in the Khomas Highland in Namibia. It was constructed and is operated by researchers from Armenia, Australia, Austria, France, Germany, Ireland, Japan, the Netherlands, Poland, South Africa, Sweden, UK, and the host country, Namibia. For more details see https://hess.in2p3.fr/. View this GCN Circular online at https://gcn.nasa.gov/circulars/41095. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 39148] GRB 250713A: Mephisto optical upper limits
by GCN Circulars 15 Jul '25

15 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41094 SUBJECT: GRB 250713A: Mephisto optical upper limits DATE: 25/07/15 05:31:26 GMT FROM: Brajesh Kumar at SWIFAR, YNU <brajesh(a)ynu.edu.cn> Helong Guo, Yuan Fang, Yuze Zhao, Runnan Jiang, Guowang Du, Xingzhu Zou, Xinlei Chen, Yu Pan, Xufeng Zhu, Tao Wang, Jinghua Zhang, Brajesh Kumar, Edorardo Lagioia, Dezi Liu, Chenxu Liu, Shiyan Zhong, Weikang Lin, Jianhui Lian, Yuanpei Yang, Xiangkun Liu, Xiaowei Liu (all SWIFAR, YNU) report on behalf of the Mephisto Team: Simultaneous multi-band photometric observations of the SVOM GRB 250713A (Maggi et al., GCN 41078) were performed with the 1.6m Multi-channel Photometric Survey Telescope (Mephisto) of Yunnan University located at Lijiang Observatory. The observations started from 17:11:19 2025-07-13 UT (~5 minutes after the trigger), and several frames were obtained in uvgr bands. In our stacked images, no new optical source was detected within the SVOM/MXT error region and in particular at the EP/FXT Source 2 position (Liang et al., GCN 41085). The 3-sigma upper limits are below: Start_Time(UT) Band Exp (sec) LimMag(AB) 2025-07-13T17:11:19 u 45*6 >20.53 2025-07-13T17:32:27 v 45*6 >20.65 2025-07-13T17:11:19 g 45*6 >21.17 2025-07-13T17:32:27 r 45*6 >21.32 Our results are consistent with Fu et al. (GCN 41079), Wu et al. (GCN 41089), Braun et al. (GCN 41090), Saccardi et al. (GCN 41091) and Li et al. (GCN 41092). ---------------------------------------------------------------------------- Mephisto (Multi-channel Photometric Survey Telescope) is a 1.6m wide-field multi-channel telescope, the first of its type in the world, capable of imaging the same field of view in three optical bands simultaneously. It provides real-time, high-quality colors of stellar objects. The on-site telescope assemblage and commissioning were carried out in September 2022. The first light in all three channels was achieved on 2023 December 21. ---------------------------------------------------------------------------- View this GCN Circular online at https://gcn.nasa.gov/circulars/41094. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 39147] Fermi GRB 250714A: Global MASTER-Net observations report
by GCN Circulars 15 Jul '25

15 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41093 SUBJECT: Fermi GRB 250714A: Global MASTER-Net observations report DATE: 25/07/15 05:31:23 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V.Lipunov, E.Gorbovskoy, A.Kuznetsov, K.Zhirkov, I.Panchenko, N.Tiurina, P.Balanutsa, V.Topolev, D.Vlasenko, G.Antipov, A.Sankovich, Yu.Tselik, Ya.Kechin, V.Senik, A.Chasovnikov, K.Labsina, I. Gorbunov (Lomonosov MSU), O.Gress, N.Budnev (ISU), C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A.Sosnovskij (CrAO), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity), D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB 250714A ( Fermi GBM team, GCN 41088) errorbox 76645 sec after notice time and 76677 sec after trigger time at 2025-07-15 04:33:10 UT, with upper limit up to 18.2 mag. Observations started at twilight. The observations began at zenith distance = 63 deg. The sun altitude is -13.5 deg. The galactic latitude b = -16 deg., longitude l = 229 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2935479 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 76707 | 2025-07-15 04:33:10 | MASTER-SAAO | (06h 08m 06.67s , -21d 35m 24.6s) | C | 60 | 17.9 | 76707 | 2025-07-15 04:33:10 | MASTER-SAAO | (06h 10m 03.90s , -21d 50m 47.4s) | C | 60 | 18.1 | 76801 | 2025-07-15 04:34:43 | MASTER-SAAO | (06h 16m 39.44s , -21d 36m 00.7s) | C | 60 | 17.7 | 76801 | 2025-07-15 04:34:43 | MASTER-SAAO | (06h 18m 36.55s , -21d 51m 23.8s) | C | 60 | 18.0 | 76894 | 2025-07-15 04:36:17 | MASTER-SAAO | (06h 13m 14.34s , -23d 28m 23.7s) | C | 60 | 18.1 | 76894 | 2025-07-15 04:36:17 | MASTER-SAAO | (06h 15m 13.24s , -23d 43m 46.0s) | C | 60 | 18.2 | 76988 | 2025-07-15 04:37:50 | MASTER-SAAO | (06h 21m 58.36s , -23d 29m 38.0s) | C | 60 | 17.8 | 76988 | 2025-07-15 04:37:50 | MASTER-SAAO | (06h 23m 57.16s , -23d 45m 00.4s) | C | 60 | 18.0 | 77361 | 2025-07-15 04:44:03 | MASTER-SAAO | (06h 10m 03.46s , -21d 50m 52.0s) | C | 60 | 16.9 | 77361 | 2025-07-15 04:44:03 | MASTER-SAAO | (06h 08m 05.85s , -21d 35m 28.9s) | C | 60 | 16.5 | 77454 | 2025-07-15 04:45:37 | MASTER-SAAO | (06h 18m 34.24s , -21d 51m 29.2s) | C | 60 | 16.8 | 77548 | 2025-07-15 04:47:10 | MASTER-SAAO | (06h 15m 15.43s , -23d 45m 20.1s) | C | 60 | 16.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/41093. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 39146] GRB 250713A: SVOM/VT optical upper limit
by GCN Circulars 14 Jul '25

14 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41092 SUBJECT: GRB 250713A: SVOM/VT optical upper limit DATE: 25/07/14 11:38:39 GMT FROM: Huali Li at at NAOC, SVOM <lhl(a)nao.cas.cn> H. L. Li, L. P. Xin, Y. L. Qiu, C. Wu, Y. N. Ma, Z. H. Yao, X. H. Han, J. Wang, Y. Xu, P. P. Zhang, W. J. Xie, Y. J. Xiao, H. B. Cai, J. S. Deng, J. Y. Wei (NAOC), P. Maggi (ObAS), M. Brunet(IRAP), report on behalf of the SVOM mission team. SVOM performed an automatic slew on the burst triggered by SVOM/ECLAIRs (Maggi et al., GCN 41078). SVOM/VT began observing the field at 2025-07-13T17:09:14 UTC, 168 seconds after T0, in the VT_B (400nm-650nm) and VT_R (650nm-1000nm) channels simultaneously. No uncatalogued candidate was detected in our single or stacked images within the errorbox of the SVOM/MXT position (Maggi et al., GCN 41078) or FXT (Liang et al., 41085) or XRT (Evens et al., GCN 41086) . The 3-sigma upper limits are: [T-T0, mid-time] | exposure time (s) | band | upper limit (AB) ----------- --------|-------------------|------|----------------- 20.7 min | 44*50 | VT_B | 23.5 20.7 min | 44*50 | VT_R | 23.2 Our results are consistent with Fu et al. (GCN 41079), Wu et al. (GCN 41089), and Braun et al. (GCN 41090) and Saccardi et al. (GCN 41091). NIR follow-ups are encouraged to investigate the nature of the burst. The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA, China), National Centre for Space Studies (CNES, France) and the Chinese Academy of Sciences (CAS, China), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. VT was jointly developed by Xi'an Institute of Optics and Precision Mechanics (XIOPM), CAS and National astronomical observatories (NAOC), CAS. The Burst Advocate (BA) on shift for this alert is Pierre Maggi: pierre.maggi(a)astro.unistra.fr View this GCN Circular online at https://gcn.nasa.gov/circulars/41092. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 39145] GRB 250713A: NOT optical upper limits
by GCN Circulars 14 Jul '25

14 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41091 SUBJECT: GRB 250713A: NOT optical upper limits DATE: 25/07/14 10:43:55 GMT FROM: Andrea Saccardi at CEA/Irfu <andrea.saccardi(a)cea.fr> A. Saccardi (CEA/Irfu), A. Martin-Carrillo (UCD), D. B. Malesani (DAWN/NBI and Radboud), A. de Ugarte Postigo (LAM), G. Corcoran (UCD), J. T. Palmerio (CEA/Irfu), L. Izzo (INAF/OACN and DARK/NBI), B. P. Gompertz (Birmingham), N. Pyykkinen (Univ. of Turku and NOT), K. Valeckas (NBI and NOT), report on behalf of a larger collaboration: We observed the field of GRB 250713A detected by SVOM/ECLAIRs (Maggi et al., GCN 41078), using the ALFOSC camera mounted on the Nordic Optical Telescope (NOT) centered at the X-ray source detected by SVOM/MXT. We obtained 5x200 s exposures in each of the SDSS i and z bands, starting at 23:46:40 UT on 2025-07-13 (6.67 hr after the SVOM/ECLAIRs trigger). No new optical source is detected at a position consistent with the SVOM/MXT error region and in particular with the EP/FXT Source 2 (Liang et al., GCN 41085) in the stacked images of either band, down to the 5-sigma limiting AB magnitudes of i > 22.9 and z > 22.5, calibrated against nearby stars from the Pan-STARRS catalog and not corrected for Galactic extinction. Our results are consistent with Fu et al. (GCN 41079), Wu et al. (GCN 41089), and Braun et al. (GCN 41090). We note the presence of an object just north of EP/FXT Source 2, at coordinates (J2000): RA = 22:27:34.17 Dec = +38:46:23.8 This is just 11" away from the centre of the 10"-radius EP/FXT error circle. This point-like object is detected in both our images and in the archival Pan-STARRS images of the field. It is fainter in the NOT images, by ~0.3 and 0.2 mag in the i and z bands, respectively, indicating long-term variability. It is also listed in the Gaia catalog (doi:10.1051/0004-6361/202243940) as having a ~68% probability of being a QSO. It is thus possible that this object is responsible for the EP/FXT X-ray source, which would be then unrelated to GRB 250713A. We encourage further EP/FXT observations to test for variability of this X-ray source. Further NOT images are planned at a later date to test for short-term variability of objects in the field. View this GCN Circular online at https://gcn.nasa.gov/circulars/41091. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 39144] GRB 250713A: OHP/T193 upper limit
by GCN Circulars 14 Jul '25

14 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41090 SUBJECT: GRB 250713A: OHP/T193 upper limit DATE: 25/07/14 09:21:22 GMT FROM: Stephane Basa at UAR Pytheas/OHP, LAM <stephane.basa(a)lam.fr> O. Braun (LAM/OHP/Pytheas/AMU), C. Adami (LAM/Pytheas/AMU), B. Schneider (LAM), S. Basa (LAM/OHP/Pytheas/AMU), E. Le Floc'h (CEA/Irfu), report on behalf of a larger collaboration: We observed the field of the GRB 250713A (Maggi et al., GCN 41078; Fu et al., GCN 41079) using the T193cm telescope at Observatoire de Haute-Provence (France) equipped with the MISTRAL spectro-imager. We obtained 14 exposures (for a total of 60 min) in the r-band starting at 22:26:02 UT on 2025-07-13 (5.3 hours after the trigger). In the stacked images, we do not detect any new source at the MXT position (Maggi et al., GCN 41078). The preliminary upper limit is r > 22.3 mag (AB) at 3 sigma. No other credible source compatible with a GRB is detected in MISTRAL's field of view up to r > 21.7 mag (AB) at 5 sigma. The photometric calibration was performed using nearby stars from the PanSTARRS catalog and the magnitudes are not corrected for Galactic extinction. We used the STDWeb/STDPipe tools (Karpov 2025). We acknowledge the excellent support from the Observatoire de Haute-Provence and in particular Jean Balcaen for the MISTRAL observations. View this GCN Circular online at https://gcn.nasa.gov/circulars/41090. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 39143] GRB 250713A: OHP/T193 upper limit
by GCN Circulars 14 Jul '25

14 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41090 SUBJECT: GRB 250713A: OHP/T193 upper limit DATE: 25/07/14 09:21:22 GMT FROM: Stephane Basa at UAR Pytheas/OHP, LAM <stephane.basa(a)lam.fr> O. Braun (LAM/OHP/Pytheas/AMU), C. Adami (LAM/Pytheas/AMU), B. Schneider (LAM), S. Basa (LAM/OHP/Pytheas/AMU), E. Le Floc'h (CEA/Irfu), report on behalf of a larger collaboration: We observed the field of the GRB 250713A (Maggi et al., GCN 41078; Fu et al., GCN 41079) using the T193cm telescope at Observatoire de Haute-Provence (France) equipped with the MISTRAL spectro-imager. We obtained 14 exposures (for a total of 60 min) in the r-band starting at 22:26:02 UT on 2025-07-13 (5.3 hours after the trigger). In the stacked images, we do not detect any new source at the MXT position (Maggi et al., GCN 41078). The preliminary upper limit is r > 22.3 mag (AB) at 3 sigma. No other credible source compatible with a GRB is detected in MISTRAL's field of view up to r > 21.7 mag (AB) at 5 sigma. The photometric calibration was performed using nearby stars from the PanSTARRS catalog and the magnitudes are not corrected for Galactic extinction. We used the STDWeb/STDPipe tools (Karpov 2025). We acknowledge the excellent support from the Observatoire de Haute-Provence and in particular Jean Balcaen for the MISTRAL observations. View this GCN Circular online at https://gcn.nasa.gov/circulars/41090. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 39142] GRB 250713A: SVOM/C-GFT upper limit
by GCN Circulars 14 Jul '25

14 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41089 SUBJECT: GRB 250713A: SVOM/C-GFT upper limit DATE: 25/07/14 07:50:58 GMT FROM: SVOM_group <svomgroup(a)bao.ac.cn> Chao WU (NAOC), Zhe Kang (CHO), Liping Xin(NAOC), Xuhui Han(NAOC), Pinpin Zhang (NAOC), Xiaomeng Lu (NAOC), Zhenwei Li (CHO), You Lv (CHO), Ruosong Zhang (NAOC), Yujie Xiao(NAOC), Yulei, Qiu(NAOC), Jing Wang (NAOC), Jinsong Deng(NAOC), Lei Huang(NAOC), Jianyan Wei (NAOC), P. Maggi (ObAS) report on behalf of the SVOM/C-GFT team: We observed the field of GRB250713A (sb25071320) detected by SVOM/ECLAIRs (GCN 41078) with LATIOS on SVOM/C-GFT. Observations started at 2025-07-13T17:07:44 UTC, ~78 seconds after the trigger. A series of g, r, and i band images were obtained under brighter Moon. No credible candidate was detected within the error box provided by SVOM/MXT(GCN 41078), EP/FXT (GCN 41085), and Swift/XRT(GCN 41086) in our images after preliminary processing, the three sigma upper limits are: | Date-Obs (mid-time) | Mid_t - T0 (s) | Exposure Time (s) | Band | Upper Limit (AB) | |---------------------|----------------|-------------------|------|------------------| | 2025-07-13T17:09:13 | 167 | 6×10 | i | 18.12 | | 2025-07-13T17:20:51 | 864 | 6×30 | g | 18.84 | | 2025-07-13T17:24:26 | 1080 | 6×30 | r | 18.38 | This result is consistent with GCN 41079. The photometry was calibrated with UCAC4 catalogue. We thank the observation assistants Chunlei Guo and Guangsheng Zhang at Jilin observatory for their excellent support. The Chinese Ground Follow-up Telescope (C-GFT) for the SVOM mission is located at Jilin Station, Changchun Observatory, National Astronomical Observatories, CAS. It features two instruments: (1) CATCH at the Cassegrain focus with a 21 arcsec x 21 arcsec FOV for simultaneous g/r/i-band imaging, and (2) LATIOS, a 4k x 4k CMOS camera at the prime focus with a 1.28 deg x 1.28 deg FOV that images in g, r, and i bands via filter switching. View this GCN Circular online at https://gcn.nasa.gov/circulars/41089. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 39141] GRB 250714A: Fermi GBM Final Real-time Localization
by GCN Circulars 14 Jul '25

14 Jul '25

TITLE: GCN CIRCULAR NUMBER: 41088 SUBJECT: GRB 250714A: Fermi GBM Final Real-time Localization DATE: 25/07/14 07:25:43 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply(a)GIOC.nsstc.nasa.gov> The Fermi GBM team reports the detection of a likely LONG GRB At 07:15:13 UT on 14 Jul 2025, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 250714A (trigger 774170118.010932 / 250714302). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 94.7, Dec = -21.2 (J2000 degrees, equivalent to J2000 06h 18m, -21d 11'), with a statistical uncertainty of 2.7 degrees. The angle from the Fermi LAT boresight is 57.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250714302/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250714302/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2025/bn250714302/… View this GCN Circular online at https://gcn.nasa.gov/circulars/41088. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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