November 2024 - vsnet-grb-info - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-grb-info 36392] IPN triangulation of GRB 241128B
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38399 SUBJECT: IPN triangulation of GRB 241128B DATE: 24/11/30 21:38:39 GMT FROM: Dmitry Svinkin at Ioffe Institute <svinkin(a)mail.ioffe.ru> A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the MGNS/BepiColombo and HEND/Mars Odyssey teams, J. Benkhoff on behalf of the BepiColombo team, D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team, E. Burns on behalf of the IPN, E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team, and W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr, and A.S. Gardner on on behalf of the GRS-Odyssey GRB team, report: The bright, long-duration GRB 241128B (SVOM-GRM detection: Xue et al., GCN 38389) Konus-Wind, INTEGRAL (SPI-ACS), SVOM (GRM), Mars-Odyssey (HEND), and BepiColombo (MGNS), at about 19346 s UT (05:22:26). We have triangulated it to a preliminary, 3 sigma error region whose area is 880 sq. arcmin, and its maximum dimension is 7.9 deg (the minimum one is 2.1 arcmin). This localization may be improved. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB241128_T19346/IPN The HEALPix triangulation maps are in units of probability density. The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular. View this GCN Circular online at https://gcn.nasa.gov/circulars/38399. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 36391] Konus-Wind detection of GRB 241114B
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38398 SUBJECT: Konus-Wind detection of GRB 241114B DATE: 24/11/30 21:32:42 GMT FROM: Dmitry Svinkin at Ioffe Institute <svinkin(a)mail.ioffe.ru> V. Panteleeva, D. Frederiks, A. Lysenko, A. Ridnaia, D. Svinkin, A. Tsvetkova, M. Ulanov, and T. Cline, on behalf of the Konus-Wind team, report: The long-duration GRB 241114B (Insight-HXMT-HE detection: Wang et al., GCN 38284; IPN triangulation: Svinkin et al., GCN 38341) triggered Konus-Wind at T0=39903.659 s UT (11:05:03.659). The burst light curve shows a multipeaked structure which starts at ~T0-11.7 s and has a total duration of ~45 s. The emission is seen up to ~2 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB241114_T39903/ As observed by Konus-Wind, the burst had a fluence of 4.03(-0.38,+0.43)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+23.648 s, of 1.38(-0.22,+0.24)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+32.768 s) is best fit in the 20 keV - 16 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -1.15(-0.10,+0.11), the high energy photon index beta = -3.11(-6.89,+0.49), the peak energy Ep = 258(-25,+30) keV (chi2 = 123/97 dof). The spectrum near the maximum count rate (measured from T0+16.640 s to T0+24.576 s) is best fit in the 20 keV - 16 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.76(-0.14,+0.17), the high energy photon index beta = -3.08(-6.92,+0.46), the peak energy Ep = 272(-30,+31) keV (chi2 = 84/77 dof). All the quoted errors are at the 90% confidence level. All the quoted values are preliminary. View this GCN Circular online at https://gcn.nasa.gov/circulars/38398. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 36390] LIGO/Virgo/KAGRA S241130n: Updated Sky localization
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38397 SUBJECT: LIGO/Virgo/KAGRA S241130n: Updated Sky localization DATE: 24/11/30 20:02:05 GMT FROM: Elise Sänger at Max Planck Institute for Gravitational Physics (AEI Potsdam) <elise.sanger(a)ligo.org> The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: We have conducted further analysis of the LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) data around the time of the compact binary merger (CBC) candidate S241130n (GCN Circular 38391). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline0.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page: https://gracedb.ligo.org/superevents/S241130n For the Bilby.offline0.multiorder.fits,0 sky map, the 90% credible region is 302 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1790 +/- 518 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/. [1] Ashton et al. ApJS 241, 27 (2019) doi:10.3847/1538-4365/ab06fc and Morisaki et al. PRD 108, 123040 (2023) doi:10.1103/PhysRevD.108.123040 View this GCN Circular online at https://gcn.nasa.gov/circulars/38397. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 36389] LIGO/Virgo/KAGRA S241125n: GRANDMA Optical Upper Limits
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38396 SUBJECT: LIGO/Virgo/KAGRA S241125n: GRANDMA Optical Upper Limits DATE: 24/11/30 17:57:41 GMT FROM: Dalya Akl at American Uni. SHJ <dalyaakl.d(a)gmail.com> D. Akl (AUS), C. Andrade (UMN), E. de Bruin (UMN), M. Tanasan (NARIT), N. Kochiashvili (AbAO), T. Hussenot-Desenonges (IJCLAB), M. Coughlin (UMN), M. Molham (NRIAG), S. Agayeva (Shamakhy Obs.), S. Antier (OCA), S. Karpov (FZU), D. Turpin (CEA-Saclay/Irfu), I. Tosta e Melo (UniCT-DFA), P. Hello (IJCLAB), P-A Duverne (APC), T. Pradier (Unistra/IPHC), N. Guessoum (AUS), M. Masek (FZU), K. Noysena (NARIT), M. Eldepsy (NRIAG), A. Shokry (NRIAG), E. Elhosseiny (NRIAG), A. Takey (NRIAG) on behalf of the GRANDMA collaboration: We observed the field of the Swift/BAT-GUANO candidate counterpart (DeLaunay et al., GCN 38308) of the GW compact binary merger candidate S241125n (LIGO/Virgo/KAGRA Collaborations, GCN 38305) with the GRANDMA network. Our observations were conducted with the FRAM-CTA-N, TRT-SRO, and KAO telescopes starting ~0.8 days post T0 in the R, I, and i' bands, respectively. No clear candidate is identified within the 5 arcmin uncertainty region around the BAT position (RA, Dec = 58.079, 69.689 deg), with the following 5-sigma upperlimits: +---------------------+-------------+--------+----------+------------+ | T-mid(UTC) | Exposure(s) | Filter | U.L.(AB) | Instrument | +=====================+=============+========+==========+============+ | 2024-11-25T20:32:50 | 20x120 | R | 16.38 | FRAM-CTA-N | | 2024-11-25T23:38:47 | 23x150 | i' | 21.87 | KAO | | 2024-11-27T07:30:28 | 6x300 | I | 19.83 | TRT-SRO | | 2024-11-28T02:35:43 | 8x300 | I | 20.22 | TRT-SRO | +---------------------+-------------+--------+----------+------------+ This non-detection is consistent with Chen et al., GCN 38314, Watson et al., GCN 38317, Swain et al., GCN 38322, Mohan et al., GCN 38325, Jiang et al., GCN 38328, Becerra et al., GCN 38329. Our FRAM-CTA-N observation includes the positions of all 5 Swift-XRT X-ray sources (Page et al., GCN 38324). The KAO and TRT-SRO observations include only the position of the S241125n_X3 XRT source. We do not detect any clear candidates within the localization regions of these sources. This non-detection is consistent with Becerra et al., GCN 38329 and Akl et al., GCN 38334. Further, the FRAM-CTA-N observation includes all of the X-ray sources detected by EP-FXT (Wang et al., GCN 38345), while the KAO and TRT-SRO images include only the X-ray source detected by both modules of the EP-FXT with an averaged position at RA, Dec = 58.1097, 69.6392 deg and an uncertainty of 10 arcsec. We do not detect any of the EP-FXT sources across all of our images. All the data have been reduced by a single data processing pipeline, STDPipe (Karpov et al., 2022). Images obtained in Johnson Cousin filters were calibrated using the Gaia DR3 Synphot catalog, while images taken with Sloan filters were calibrated using the Pan-STARRS DR1 catalog. We use the SkyPortal application (skyportal.io) to monitor our observational campaign (Coughlin et al. 2023). GRANDMA is a worldwide telescope network (grandma.ijclab.in2p3.fr) devoted to the observation of transients in the context of multi-messenger astrophysics (Antier et al. 2020 MNRAS 497, 5518). View this GCN Circular online at https://gcn.nasa.gov/circulars/38396. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 36388] GRB 241128A: AbAO optical upper limit
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38395 SUBJECT: GRB 241128A: AbAO optical upper limit DATE: 24/11/30 15:48:32 GMT FROM: Alexei Pozanenko at IKI, Moscow <grb.alex(a)gmail.com> N. Pankov (HSE), A. Pozanenko (IKI), E. Klunko (ISTP), A. Volnova (IKI), S. Belkin (HSE, Monash) report on behalf of GRB IKI FuN: We observed the field of GRB 241128A (Brivio et al., GCN 38367; Page, GCN 38368; Parsotan et al., GCN 38387) with AS-32 telescope of Abastumani observatory (AbAO) in R-filter on 2024-11-29 starting (UT) 14:47:06. We do not detect the afterglow (Hu et al., GCN 38371; Izzo and Malesani, GCN 38372; Gompertz et al., GCN 38373; Akl et al., GCN 38382; Pankov et al., GCN 38383). Preliminary photometry of the field is the following Date UT start t-T0 Exp. Filter OT Err. UL(3sigma) (mid, days) (s) 2024-11-29 14:47:06 0.96877 85x60 R n/d n/d 20.2 The photometry is based on nearby USNO-B1.0 R2 star View this GCN Circular online at https://gcn.nasa.gov/circulars/38395. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 36387] LIGO/Virgo/KAGRA S241127aj: Updated Sky localization
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38394 SUBJECT: LIGO/Virgo/KAGRA S241127aj: Updated Sky localization DATE: 24/11/30 14:56:01 GMT FROM: ethan.payne(a)ligo.org The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: We have conducted additional further analysis of the LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) data around the time of the compact binary merger (CBC) candidate S241127aj (GCN Circular 38361). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline1.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page: https://gracedb.ligo.org/superevents/S241127aj For the Bilby.offline1.multiorder.fits,0 sky map, the 90% credible region is 53 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1050 +/- 67 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/. [1] Ashton et al. ApJS 241, 27 (2019) doi:10.3847/1538-4365/ab06fc and Morisaki et al. PRD 108, 123040 (2023) doi:10.1103/PhysRevD.108.123040 View this GCN Circular online at https://gcn.nasa.gov/circulars/38394. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 36386] LIGO/Virgo/KAGRA S241130be: Identification of a GW compact binary merger candidate
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38393 SUBJECT: LIGO/Virgo/KAGRA S241130be: Identification of a GW compact binary merger candidate DATE: 24/11/30 11:55:12 GMT FROM: martina.dicesare(a)ligo.org The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: We identified the compact binary merger candidate S241130be during real-time processing of data from LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) at 2024-11-30 11:04:22.113 UTC (GPS time: 1416999880.113). The candidate was found by the GstLAL [1], MBTA [2], PyCBC Live [3], and SPIIR [4] analysis pipelines. S241130be is an event of interest because its false alarm rate, as estimated by the online analysis, is 1.9e-10 Hz, or about one in 1e2 years. The event's properties can be found at this URL: https://gracedb.ligo.org/superevents/S241130be The classification of the GW signal, in order of descending probability, is BBH (>99%), Terrestrial (<1%), BNS (<1%), or NSBH (<1%). Assuming the candidate is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [5] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [5] Both HasNS and HasRemnant consider the support of several neutron star equations of state for maximum neutron star mass. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassGap) is 4%. Two sky maps are available at this time and can be retrieved from the GraceDB event page: * bayestar.multiorder.fits,0, an initial localization generated by BAYESTAR [6], distributed via GCN notice about 28 seconds after the candidate event time. * bayestar.multiorder.fits,1, an initial localization generated by BAYESTAR [6], distributed via GCN notice about 5 minutes after the candidate event time. The preferred sky map at this time is bayestar.multiorder.fits,1. For the bayestar.multiorder.fits,1 sky map, the 90% credible region is 1301 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 1350 +/- 388 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/. [1] Tsukada et al. PRD 108, 043004 (2023) doi:10.1103/PhysRevD.108.043004 and Ewing et al. (2023) arXiv:2305.05625 [2] Aubin et al. CQG 38, 095004 (2021) doi:10.1088/1361-6382/abe913 [3] Dal Canton et al. ApJ 923, 254 (2021) doi:10.3847/1538-4357/ac2f9a [4] Chu et al. PRD 105, 024023 (2022) doi:10.1103/PhysRevD.105.024023 [5] Chatterjee et al. ApJ 896, 54 (2020) doi:10.3847/1538-4357/ab8dbe [6] Singer & Price PRD 93, 024013 (2016) doi:10.1103/PhysRevD.93.024013 View this GCN Circular online at https://gcn.nasa.gov/circulars/38393. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 36385] LIGO/Virgo/KAGRA S241129aa: Updated Sky localization
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38392 SUBJECT: LIGO/Virgo/KAGRA S241129aa: Updated Sky localization DATE: 24/11/30 06:40:27 GMT FROM: ethan.payne(a)ligo.org The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: We have conducted further analysis of the LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) data around the time of the compact binary merger (CBC) candidate S241129aa (GCN Circular 38377). Parameter estimation has been performed using Bilby [1] and a new sky map, Bilby.offline0.multiorder.fits,0, distributed via GCN Notice, is available for retrieval from the GraceDB event page: https://gracedb.ligo.org/superevents/S241129aa For the Bilby.offline0.multiorder.fits,0 sky map, the 90% credible region is 269 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 2499 +/- 437 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/. [1] Ashton et al. ApJS 241, 27 (2019) doi:10.3847/1538-4365/ab06fc and Morisaki et al. PRD 108, 123040 (2023) doi:10.1103/PhysRevD.108.123040 View this GCN Circular online at https://gcn.nasa.gov/circulars/38392. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 36384] LIGO/Virgo/KAGRA S241130n: Identification of a GW compact binary merger candidate
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38391 SUBJECT: LIGO/Virgo/KAGRA S241130n: Identification of a GW compact binary merger candidate DATE: 24/11/30 05:06:18 GMT FROM: Gaurav Waratkar at IIT Bombay <gauravwaratkar(a)iitb.ac.in> The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration report: We identified the compact binary merger candidate S241130n during real-time processing of data from LIGO Hanford Observatory (H1), LIGO Livingston Observatory (L1), and Virgo Observatory (V1) at 2024-11-30 03:49:08.603 UTC (GPS time: 1416973766.603). The candidate was found by the cWB [1], cWB BBH [2], GstLAL [3], MBTA [4], PyCBC Live [5], and SPIIR [6] analysis pipelines. S241130n is an event of interest because its false alarm rate, as estimated by the online analysis, is 4e-20 Hz, or about one in 1e12 years. The event's properties can be found at this URL: https://gracedb.ligo.org/superevents/S241130n The classification of the GW signal, in order of descending probability, is BBH (>99%), BNS (<1%), NSBH (<1%), or Terrestrial (<1%). Assuming the candidate is astrophysical in origin, the probability that the lighter compact object is consistent with a neutron star mass (HasNS) is <1%. [7] Using the masses and spins inferred from the signal, the probability of matter outside the final compact object (HasRemnant) is <1%. [7] Both HasNS and HasRemnant consider the support of several neutron star equations of state for maximum neutron star mass. The probability that either of the binary components lies between 3 and 5 solar masses (HasMassGap) is <1%. Two sky maps are available at this time and can be retrieved from the GraceDB event page: * bayestar.multiorder.fits,0, an initial localization generated by BAYESTAR [8], distributed via GCN notice about 29 seconds after the candidate event time. * bayestar.multiorder.fits,1, an initial localization generated by BAYESTAR [8], distributed via GCN notice about 5 minutes after the candidate event time. The preferred sky map at this time is bayestar.multiorder.fits,1. For the bayestar.multiorder.fits,1 sky map, the 90% credible region is 543 deg2. Marginalized over the whole sky, the a posteriori luminosity distance estimate is 2052 +/- 550 Mpc (a posteriori mean +/- standard deviation). For further information about analysis methodology and the contents of this alert, refer to the LIGO/Virgo/KAGRA Public Alerts User Guide https://emfollow.docs.ligo.org/. [1] Klimenko et al. PRD 93, 042004 (2016) doi:10.1103/PhysRevD.93.042004 [2] T. Mishra et al. PRD 105, 083018 (2022) doi:10.1103/PhysRevD.105.083018 [3] Tsukada et al. PRD 108, 043004 (2023) doi:10.1103/PhysRevD.108.043004 and Ewing et al. (2023) arXiv:2305.05625 [4] Aubin et al. CQG 38, 095004 (2021) doi:10.1088/1361-6382/abe913 [5] Dal Canton et al. ApJ 923, 254 (2021) doi:10.3847/1538-4357/ac2f9a [6] Chu et al. PRD 105, 024023 (2022) doi:10.1103/PhysRevD.105.024023 [7] Chatterjee et al. ApJ 896, 54 (2020) doi:10.3847/1538-4357/ab8dbe [8] Singer & Price PRD 93, 024013 (2016) doi:10.1103/PhysRevD.93.024013 View this GCN Circular online at https://gcn.nasa.gov/circulars/38391. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0

[vsnet-grb-info 36383] SVOM/GRM observation of a short burst from soft gamma repeater Kes 73
by GCN Circulars 30 Nov '24

30 Nov '24

TITLE: GCN CIRCULAR NUMBER: 38390 SUBJECT: SVOM/GRM observation of a short burst from soft gamma repeater Kes 73 DATE: 24/11/30 02:41:15 GMT FROM: Wang-Chen Xue <wcxuemail(a)gmail.com> SVOM/GRM team: Wang-Chen Xue, Chao Zheng, Chen-Wei Wang, Shi-Jie Zheng, Yong-Wei Dong, Jiang-Tao Liu, Jian-Chao Sun, Yue Huang, Jiang He, Min Gao, Hao-Xuan Guo, Lu Li, Yong-Ye Li, Hong-Wei Liu, Xin Liu, Hao-Li Shi, Li-Ming Song, You-Li Tuo, Wen-Long Zhang, Wen-Jun Tan, Hao-Xi Wang, Jin Wang, Jin-Zhou Wang, Ping Wang, Rui-Jie Wang, Yu-Xi Wang, Bo-Bing Wu, Shao-Lin Xiong, Jian-Ying Ye, Yi-Tao Yin, Wen-Hui Yu, Fan Zhang, Li Zhang, Peng Zhang, Shuang-Nan Zhang, Yan-Qiu Zhang, Yan-Ting Zhang, Shu-Min Zhao, Xiao-Yun Zhao (IHEP), Maria-Grazia Bernardini (LUPM/INAF-OAB), Laurent Bouchet (IRAP), David Corre (CEA), Tais Maiolino (LUPM), Frédéric Piron (LUPM), Stéphane Schanne (CEA), Jingwei Wang (IAP), JeanLuc Attéia (IRAP) SVOM JSWG: Jian-Yan Wei (NAOC), Bertrand Cordier (CEA), Shuang-Nan Zhang (IHEP), Stéphane Basa (LAM), Arnaud Claret (CEA), Zi-Gao Dai (USTC), Frédéric Daigne (IAP), Jin-Song Deng (NAOC), Olivier Godet (IRAP), Andrea Goldwurm (APC), Diego Götz (CEA), Xu-Hui Han (NAOC), Cyril Lachaud (APC), En-Wei Liang (GXU), Yu-Lei Qiu (NAOC), Susanna Vergani (Obs.Paris), Jing Wang (NAOC), Chao Wu (NAOC), Li-Ping Xin (NAOC), Shao-Lin Xiong (IHEP), Bing Zhang (UNLV) report on behalf of the SVOM team: During the commissioning phase, SVOM/GRM was triggered in-flight by a short burst (SVOM trigger reference: sb24112902) from Kes 73 at 2024-11-29T10:56:49.200 UTC (T0), which was also observed by Fermi/GBM and Swift/BAT (Atel #16927). With the event-by-event data downloaded through the X-band ground station, the GRM light curve shows that this burst consists of single pulse with a duration of about 0.1 s. The SVOM/GRM light curve can be found here: https://www.bursthub.cn//admin/static/svgrb241129B.png The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA, China), National Center 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. GRM is developed by the Institute of High Energy Physics (IHEP) of CAS. The SVOM/GRM point of contact for this burst is: Wang-Chen Xue (IHEP)(xuewc(a)ihep.ac.cn) View this GCN Circular online at https://gcn.nasa.gov/circulars/38390. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

1 0