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

[vsnet-grb-info 38420] EP250508a: COLIBRÍ Optical Limit
by GCN Circulars 08 May '25

08 May '25

TITLE: GCN CIRCULAR NUMBER: 40391 SUBJECT: EP250508a: COLIBRÍ Optical Limit DATE: 25/05/08 07:01:07 GMT FROM: Antonio de Ugarte Postigo at LAM, CNRS <adeugartepostigo(a)gmail.com> Antonio de Ugarte Postigo (LAM), Noémie Globus (UNAM), Rosa L. Becerra (U Roma), Jean-Grégoire Ducoin (CPPM), Stéphane Basa (UAR Pytheas), William H. Lee (UNAM), Alan M. Watson (UNAM), Fredd Alvarez (UNAM), Jean-Luc Atteia (IRAP), Camila Angulo (UNAM), Dalya Akl (AUS), Sarah Antier (OCA), Nathaniel R. … [View More]

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[vsnet-grb-info 38419] EP250508a: Einstein Probe detection of an X-ray transient
by GCN Circulars 08 May '25

08 May '25

TITLE: GCN CIRCULAR NUMBER: 40390 SUBJECT: EP250508a: Einstein Probe detection of an X-ray transient DATE: 25/05/08 06:37:42 GMT FROM: EP Team at NAOC/CAS <ep_ta(a)bao.ac.cn> R.D. Liang, T. Zhao, H. Q. Cheng, W. D. Zhang (NAOC, CAS) on behalf of the Einstein Probe (EP) team: We report on the detection of an X-ray transient by the Wide-field X-ray Telescope (WXT) on board the Einstein Probe (EP) mission, designated EP250508a. The transient triggered EP-WXT (ID: 01709175339) at … [View More]

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[vsnet-grb-info 38418] GRB 250507A: Swift-XRT refined Analysis
by GCN Circulars 07 May '25

07 May '25

TITLE: GCN CIRCULAR NUMBER: 40389 SUBJECT: GRB 250507A: Swift-XRT refined Analysis DATE: 25/05/07 22:02:18 GMT FROM: Phil Evans at U of Leicester <pae9(a)star.le.ac.uk> J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), E. Ambrosi (INAF-IASFPA) , M. A. Williams (PSU), S. Dichiara (PSU), J.A. Kennea (PSU) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: We have analysed … [View More]

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[vsnet-grb-info 38417] IceCube-250506A: Upper limits from a search for additional neutrino events in IceCube
by GCN Circulars 07 May '25

07 May '25

TITLE: GCN CIRCULAR NUMBER: 40388 SUBJECT: IceCube-250506A: Upper limits from a search for additional neutrino events in IceCube DATE: 25/05/07 20:57:42 GMT FROM: Jessie Thwaites at IceCube/U Wisc-Madison <thwaites(a)wisc.edu> The IceCube Collaboration (http://icecube.wisc.edu/) reports: IceCube has performed a search [1] for additional track-like muon neutrino events arriving from the direction of IceCube-250506A (https://gcn.nasa.gov/circulars/40369) in a time range of 1000 … [View More]

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[vsnet-grb-info 38416] GRB 250506A: Swift/UVOT Upper Limits
by GCN Circulars 07 May '25

07 May '25

TITLE: GCN CIRCULAR NUMBER: 40387 SUBJECT: GRB 250506A: Swift/UVOT Upper Limits DATE: 25/05/07 20:04:42 GMT FROM: Samantha Oates at University of Birmingham <samantha.oates(a)alumni.ucl.ac.uk> S. R. Oates (Lancaster U.) and N. Klinger (GSFC/UMBC/CRESSTII) report on behalf of the Swift/UVOT team: The Swift/UVOT began settled observations of the field of GRB 250506A 63 ks after the of the SVOM and Fermi-detected GRB 250506A (GCN Circs. 40355, 40358). No optical afterglow … [View More]

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[vsnet-grb-info 38415] GRB 250427B : SVOM detection of a burst through offline search
by GCN Circulars 07 May '25

07 May '25

TITLE: GCN CIRCULAR NUMBER: 40386 SUBJECT: GRB 250427B : SVOM detection of a burst through offline search DATE: 25/05/07 16:58:28 GMT FROM: SVOM_group <svomgroup(a)bao.ac.cn> M. Brunet (IRAP), N. Dagoneau (CEA), O. Godet (IRAP), S.J. Zheng (IHEP), report on behalf of the SVOM team : The SVOM/ECLAIRs telescope detected a transient source, labelled GRB 250427B, starting at 2025-04-27T20:57:56.9 UTC (Tb), through an offline search with the event-by-event data downloaded through … [View More]

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[vsnet-grb-info 38414] GRB 250507A: follow-up observation with EP-FXT
by GCN Circulars 07 May '25

07 May '25

TITLE: GCN CIRCULAR NUMBER: 40385 SUBJECT: GRB 250507A: follow-up observation with EP-FXT DATE: 25/05/07 15:44:09 GMT FROM: EP Team at NAOC/CAS <ep_ta(a)bao.ac.cn> M. H. Zhang, H. Sun (NAO, CAS), Y. J. Zhang (THU), W. Yuan (NAO, CAS) on behalf of the Einstein Probe (EP) team: EP-FXT performed a follow-up observation of GRB 250507A at 2025-05-07T07:33:50 (UTC), about 1 hour after the SVOM/ECLAIRs trigger (Wang et al., GCN # 40374). An uncatalogued X-ray source (EPF_J121215.7−… [View More]

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[vsnet-grb-info 38413] GRB 250430A / EP250430a: AstroSat CZTI detection
by GCN Circulars 07 May '25

07 May '25

TITLE: GCN CIRCULAR NUMBER: 40384 SUBJECT: GRB 250430A / EP250430a: AstroSat CZTI detection DATE: 25/05/07 15:16:23 GMT FROM: Gaurav Waratkar at IIT Bombay <gauravwaratkar(a)iitb.ac.in> M. Tembhurnikar (IUCAA), G. Waratkar (IITB), A. Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report on behalf of the AstroSat CZTI collaboration: Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al.,… [View More]

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[vsnet-grb-info 38412] EP#01709175213/IGR J19566+0326: Swift-XRT detection
by GCN Circulars 07 May '25

07 May '25

TITLE: GCN CIRCULAR NUMBER: 40383 SUBJECT: EP#01709175213/IGR J19566+0326: Swift-XRT detection DATE: 25/05/07 14:44:00 GMT FROM: Maia Williams at PSU <mjw6837(a)psu.edu> M.A. Williams (PSU), J.A. Kennea (PSU), K.L. Page (U. Leicester), and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team: We have analyzed 1100 s of XRT data for the recently reported Einstein Probe (EP) trigger 01709175213 (GCN #40375), from T0+2.8 ks to T0+9.1 ks after detection by EP-WXT. The … [View More]

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[vsnet-grb-info 38411] GRB 250506A: SVOM/COLIBRÍ (FM-GFT) optical upper limit
by GCN Circulars 07 May '25

07 May '25

TITLE: GCN CIRCULAR NUMBER: 40382 SUBJECT: GRB 250506A: SVOM/COLIBRÍ (FM-GFT) optical upper limit DATE: 25/05/07 14:39:13 GMT FROM: J.-G. Ducoin at CPPM <ducoin(a)cppm.in2p3.fr> Jean-Grégoire Ducoin (CPPM), Alan M. Watson (UNAM), Fredd Alvarez (UNAM), Stéphane Basa (UAR Pytheas), William H. Lee (UNAM), Jean-Luc Atteia (IRAP), Camila Angulo (UNAM), Dalya Akl (AUS), Sarah Antier (OCA), Rosa L. Becerra (U Roma), Nathaniel R. Butler (ASU) , Damien Dornic (CPPM), Francis Fortin (IRAP)… [View More]

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