GRB241029A

This page lists all entries on GRB241029A in GRBweb

Summary Fermi GBM IPN GCN 37932 GCN 37934 GCN 37936 GCN 37937 GCN 37939 GCN 37940 GCN 37941 GCN 37943 GCN 37944 GCN 37945 GCN 37946 GCN 37948 GCN 37950 GCN 37954 GCN 37961 GCN 37994 GCN 38006 GCN 38009 GCN 38048 GCN 38669

Summary table
Variable Value Source
GRB_name_Fermi GRB241029097
T0 2:19:59 UTC GCN_circulars,Fermi GBM final loc
ra 325.3250° IPN
decl 5.0833° IPN
pos_error 4.17e-02° IPN
T90 13.312 s Fermi_GBM
T90_error 0.362 s Fermi_GBM
T90_start 2:19:59.866 UTC Fermi_GBM
fluence 9.53e-06 erg/cm² Fermi_GBM
fluence_error 2.38e-08 erg/cm² Fermi_GBM
redshift 1.0720 GCN_circulars,Fermi GBM Other
T100 14.178 s
GBM_located False
mjd 60612.09721064815 GCN_circulars,Fermi GBM final loc
Fermi GBM table
GRB_name_Fermi GRB241029097
trigger_name bn241029097
ra 325.3271°
decl 5.0861°
pos_error 2.83e+00°
datum 2024-10-29
t_trigger 2:19:59.866 UTC
T90 13.312 s
T90_error 0.362 s
T90_start 2:19:59.866 UTC
fluence 9.53e-06 erg/cm²
fluence_error 2.38e-08 erg/cm²
flux_1024 9.63e+00 erg/cm²/s
flux_1024_error 3.65e-01 erg/cm²/s
flux_1024_time -6.40e-02 erg/cm²/s
flux_64 1.53e+01 erg/cm²/s
flux_64_error 1.68e+00 erg/cm²/s
IPN table
GRB_name GRB241029A
ra 325.3250°
decl 5.0833°
pos_error 4.17e-02°
GCN 37932 table
GRB_name GRB241029A
GCN_number 37932
Detection_method Fermi GBM final loc
t_trigger 2:19:59 UTC
ra 324.4000°
decl 6.6000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 37932 SUBJECT: GRB 241029A: Fermi GBM Final Real-time Localization DATE: 24/10/29 02:30:36 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 02:19:59 UT on 29 Oct 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241029A (trigger 751861204.86578 / 241029097). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 324.4, Dec = 6.6 (J2000 degrees, equivalent to J2000 21h 37m, 6d 35'), with a statistical uncertainty of 1.2 degrees. The angle from the Fermi LAT boresight is 81.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241029097/quicklook/glg_skymap_all_bn241029097.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241029097/quicklook/glg_healpix_all_bn241029097.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn241029097/quicklook/glg_lc_medres34_bn241029097.gif
GCN 37934 table
GRB_name GRB241029A
GCN_number 37934
Detection_method Fermi GBM Other
ra 325.3270°
Circular_text TITLE: GCN CIRCULAR NUMBER: 37934 SUBJECT: GRB 241029A : Detection and localization of a bright long GRB by SVOM/ECLAIRs DATE: 24/10/29 07:47:35 GMT FROM: Stéphane Schanne at CEA Paris-Saclay/IRFU SVOM/ECLAIRs Commissioning Team: Stéphane Schanne, Nicolas Dagoneau, Hervé Le Provost, Frédéric Chateau (CEA), Wenjin Xie, Donghua Zhao (NAOC), Jean-Luc Atteia, Laurent Bouchet, Sebastien Guillot, Juliette Alaux, Hui Yang (IRAP), Tais Maiolino (LUPM), Floriane Cangemi (APC), Karine Mercier, Marie-Claire Charmeau, Stefano Crepaldi (CNES) SVOM JSWG: Jian-Yan Wei (NAOC), Bertrand Cordier (CEA), Shuang-Nan Zhang (IHEP), Stéphane Basa (LAM), Olivier Godet (IRAP), Arnaud Claret (CEA), Zi-Gao Dai (USTC), Frédéric Daigne (IAP), Jin-Song Deng (NAOC), 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), Bing Zhang (UNLV) Report on behalf of the SVOM team: During the commissioning phase, the SVOM/ECLAIRs telescope detected and localized a bright long duration GRB 241029A at 2024-10-29T02:19:53 UTC (Tb), previously detected by Fermi (Fermi GBM team, GCN circular 37932), and by SVOM/GRM (SVOM reference: sb241002901). The onboard trigger was not in operations, the following information was obtained by reprocessing on ground the data in the flight trigger algorithms. The burst was detected by the Count-Rate Trigger (CRT) and Image Trigger (IMT) which produced 22 Alert messages. The best Alert was obtained by CRT in the 8-120 keV energy band with a signal-to-noise ratio of 67.1 in a time window of 20.48 s starting at Tb. The event location is RA, Dec = 325.327, Dec: 5.086 (J2000). The statistical uncertainty on this position is 1.5 arcminutes to which we recommend adding 2 arcminutes of systematic uncertainty in quadrature. SVOM did not slew to the burst since automated slewing was not enabled. The Space Variable Objects Monitor (SVOM) is a China-France joint mission led by the Chinese National Space Administration (CNSA), French Space Agency (CNES), and the Chinese Academy of Sciences (CAS), which is dedicated to observing gamma-ray bursts and other transient phenomena in the energetic universe. ECLAIRs was developed jointly by APC, CEA, CNES, and IRAP. The SVOM point of contact for this burst is: b.cordier AT cea.fr.
GCN 37936 table
GRB_name GRB241029A
GCN_number 37936
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 37936 SUBJECT: GRB 241029A: Swift ToO observations DATE: 24/10/29 10:20:38 GMT FROM: Phil Evans at U of Leicester P. A. Evans (U. Leicester) reports on behalf of the Swift team: Swift has initiated a ToO observation of the SVOM/ECLAIRs GRB 241029A. Automated analysis of the XRT data will be presented online at https://www.swift.ac.uk/ToO_GRBs/00021726 Any uncatalogued X-ray sources detected in this analysis will be reported on this website and via GCN COUNTERPART notices. These are not necessarily related to the SVOM/ECLAIRs event. Any X-ray source considered to be a probable afterglow candidate will be reported via a GCN Circular after manual consideration. Details of the XRT automated analysis methods are detailed in Evans et al. (2007, A&A, 469, 379; 2009, MNRAS, 397, 1177 and 2014, ApJS, 210, 8). This circular is an official product of the Swift-XRT team.
GCN 37937 table
GRB_name GRB241029A
GCN_number 37937
Detection_method Optical
ra 325.3340°
decl 5.0815°
Circular_text TITLE: GCN CIRCULAR NUMBER: 37937 SUBJECT: GRB 241029A: TRT optical afterglow candidate detection DATE: 24/10/29 10:59:47 GMT FROM: Dong Xu at NAOC/CAS S.Q. Jiang, S.Y. Fu (NAOC), S. Tinyanont, R. Anutarawiramkul, P. Butpan (NARIT), J. An, X. Liu, Z.P. Zhu, Z. Fan, W.X. Li, N.C. Sun, Y.N. Wang, D. Xu (NAOC) report on behalf of a large collaboration: We observed the field of GRB 241029A detected by Fermi/GBM (Fermi GBM team, GCN 37932), SVOM/ECLAIRs & SVOM/GRM (Schanne et al., GCN 37934; Wang et al., GCN 37935), using the 0.7-m telescope of the Thai Robotic Telescope network (TRT), located at Springbrook Observatory, New South Wales, Australia. Observations started at 09:49:01.281 UTC on 2024-10-29, i.e., 7.486 hrs after the SVOM/ECLAIRs trigger, and a series of 360 s frames were obtained in R-band. An uncatalogued source is clearly detected in our stacked image within the SVOM/ECLAIRs error circle (Schanne et al., GCN 37934) at coordinates: R.A. (J2000) = 21:41:20.16 Dec. (J2000) = +05:04:53.31 with an uncertainty of ~ 0.5 arcsec. The source has R = 20.06 +/- 0.08, calibrated with nearby PanSTARRS stars and not corrected for Galactic extinction. NEO can be ruled at this position at the observational time by checking MPC. No other credible candidate is found within the SVOM/ECLAIRs error circle. We conclude that the source is likely the optical afterglow of the burst.
GCN 37939 table
GRB_name GRB241029A
GCN_number 37939
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37939 SUBJECT: GRB 241029A: Mephisto observations DATE: 24/10/29 14:28:59 GMT FROM: Brajesh Kumar at SWIFAR, YNU Weikang Lin (SWIFAR, YNU), Guowang Du (SWIFAR, YNU), Brajesh Kumar (SWIFAR, YNU), Yangwei Zhang (SWIFAR, YNU), Tao Wang (SWIFAR, YNU), Xian-ao Wang (SWIFAR, YNU), Yaosong Yu (SWIFAR, YNU), Yu Pan (SWIFAR, YNU), Xingzhu Zou (SWIFAR, YNU), Xinlei Chen (SWIFAR, YNU), Jinghua Zhang (SWIFAR, YNU), Yuanpei Yang (SWIFAR, YNU), Yuan Fang (SWIFAR, YNU), Yehao Cheng (SWIFAR, YNU), Chenxu Liu (SWIFAR, YNU), Xuhui Han (NAOC), Pinpin Zhang (NAOC), Liping Xin (NAOC), Chao Wu (NAOC), Xiangkun Liu (SWIFAR, YNU), Xiaowei Liu (SWIFAR, YNU) report on behalf of the Mephisto Team: The 1.6m Multi-channel Photometric Survey Telescope (Mephisto) of Yunnan University located at Lijiang Observatory was triggered to observe the field of GRB 241029A detected by Fermi/GBM (Fermi GBM team, GCN 37932), SVOM/ECLAIRs and SVOM/GRM (Schanne et al., GCN 37934; Wang et al., GCN 37935). Several uvgriz-band images were acquired starting from 11:47:29 2024-10-29 UT. We clearly detect the uncatalogued source reported by Jiang et al. (GCN 37937) in 300s of r band images and the preliminary estimated magnitude is 20.47+- 0.11 (r-band, 12:19:27 2024-10-29 UT). Further analysis is in progress. -------------------------------------------------------------------------- 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. --------------------------------------------------------------------------
GCN 37940 table
GRB_name GRB241029A
GCN_number 37940
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37940 SUBJECT: GRB 241029A: Xinglong-2.16m optical afterglow confirmation DATE: 24/10/29 14:45:50 GMT FROM: Dong Xu at NAOC/CAS S.Q. Jiang, Z.P. Zhu, S.Y. Fu, J. An, X. Liu, L.P. Xin, X.H. Han, J. Wang, D. Xu, C. Wu, J.Y. Wei (NAOC) report: We observed the field of GRB 241029A detected by Fermi/GBM (Fermi GBM team, GCN 37932), SVOM/ECLAIRs & SVOM/GRM (Schanne et al., GCN 37934; Wang et al., GCN 37935) using the 2.16m telescope located at Xinglong, Hebei, China, equipped with the BFOSC camera. Observations started at 13:17:07 UT on 2024-10-29, i.e., 10.95 hr after the SVOM/ECLAIRs trigger, and a series of 360 s frames were obtained in R-band. The previously reproted optical source (Jiang et al., GCN 37937; Lin et al., GCN 37939) is clearly detected in the stacked image, and it has decayed to R = 20.52 +/- 0.04 at 11.21 hr after the SVOM/ECLAIRs trigger, calibrated with nearby PanSTARRS stars and not corrected for Galactic extinction. We thus think the source is the optical afterglow of the burst. We thank the great support of the Xinglong-2.16m staff, in particular Yinan Zhu and Jie Zheng.
GCN 37941 table
GRB_name GRB241029A
GCN_number 37941
Detection_method Optical
ra 325.3340°
decl 5.0815°
Circular_text TITLE: GCN CIRCULAR NUMBER: 37941 SUBJECT: GRB 241029A: MASTER early optical counterpart detection DATE: 24/10/29 16:02:37 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs C.Francile, F. Podesta, R.Podesta, E. Gonzalez (Observatorio Astronomico Felix Aguilar (OAFA), V.Lipunov, E.Gorbovskoy, N.Tiurina, D.Vlasenko, I.Panchenko, A.Kuznetsov (Lomonosov MSU), P.Balanutsa, G.Antipov, N.Tiurina, A.Sankovich, A.Sosnovskij, M.Gulyaev, Ya.Kechin, V.Senik (Lomonosov MSU), O.Gress, N.Budnev(ISU), D.Buckley (SAAO), R.Rebolo (The Instituto de Astrofisica de Canarias), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V.Yurkov (Blagoveschensk Educational StateUniversity) 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 Global robotic net (http://observ.pereplet.ru Lipunov et al.,2010,Advances in Astronomy,2010,30L) started observation of Fermi GRB 241029A (GCN 37932, Ttrigger=02:19:59 UT) at MASTER-OAFA (Lipunov et al. GCN 37933, cover map https://master.sai.msu.ru/site/master2/observ.php?id=2652352 ) 66 sec after notice time (101 sec after trigger time) at 2024-10-29 02:21:41 UT. At first images (20s expositions) MASTER auto-detection system detected optical transient MASTER OT J214120.16+050453.4 at (RA, Dec) = 21h 41m 20.16s +05d 04m 53.4s on 2024-10-29.09839 UT. The OT magnitude (unfiltered) is ~13.4m (mlim=16.8). OT automatic light curve http://observ.pereplet.ru/GRB/MASTERGRB241029A_LC.jpg The OT is seen in 6 images. There is no minor planet at this place. We have reference image on 2017-05-29.35167 UT with unfiltered 18.3m. This OT was first publishied by Jiang et al. (GCN 37937, started at 09:49:01 UTC with m_OT=20.0 in R ) and continued by Weikang Lin et al. (GCN 37939), Jiang et al. GCN 37940. Observations in MASTER-Tunka and other MASTER Global Robotic Net telescopess will be continued.
GCN 37943 table
GRB_name GRB241029A
GCN_number 37943
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37943 SUBJECT: GRB 241029A: GOTO optical afterglow detection DATE: 24/10/29 17:15:04 GMT FROM: kendall.ackley@warwick.ac.uk K. Ackley, B. P. Gompertz, A. Kumar, D. O'Neill, R. Starling, M. J. Dyer, J. Lyman, K. Ulaczyk, F. Jimenez-Ibarra, D. Steeghs, D. K. Galloway, V. Dhillon, P. O'Brien, G. Ramsay, K. Noysena, R. Kotak, R. P. Breton, L. K. Nuttall, E. Palle and D. Pollacco report on behalf of the GOTO collaboration: We report on observations with the Gravitational-wave Optical Transient Observer (GOTO; Steeghs et al. 2022, Dyer et al. 2024) in response to GRB 241029A, detected by Fermi/GBM (Fermi GBM team, GCN 37932), SVOM/ECLAIRs (Schanne et al., GCN 37934) and SVOM/GRM (Wang et al., GCN 37935). Observations were performed by GOTO-S between 09:46:21 and 12:06:59 UT on 2024-10-29 (starting 7.34 hours after trigger). Each observation consisted of 4x90s exposures in the GOTO L-band (400-700 nm). Images were processed immediately after acquisition using the GOTO pipeline. Difference imaging was performed using deeper template observations of the same pointings. We detect the reported optical afterglow, originally discovered by TRT (Jiang et al., GCN 37937) and confirmed by Mephisto (Lin et al., GCN 37939), Xinglong-2.16m (Jiang et al., GCN 37940) and MASTER (Francile et al., GCN 37941). We obtained the following 3-sigma detections and limits of the optical counterpart: Date | T-T0 (d) | Filter | Mag ----------------------------------------------------------------------- 2024-10-29 09:49:05 | 0.312 | L | 20.59 ± 0.3 2024-10-29 10:55:41 | 0.358 | L | 20.62 ± 0.4 2024-10-29 12:03:21 | 0.405 | L | >20.43 Magnitudes were calibrated using ATLAS-REFCAT2 (Tonry et al. 2018) and are not corrected for Galactic extinction. Observations are ongoing. GOTO (https://goto-observatory.org) is a network of telescopes that is principally funded by the STFC and operated at the Roque de los Muchachos Observatory on La Palma, Spain, and Siding Spring Observatory in NSW, Australia, on behalf of a consortium including the University of Warwick, Monash University, Armagh Observatory & Planetarium, the University of Leicester, the University of Sheffield, the National Astronomical Research Institute of Thailand (NARIT), the University of Turku, the University of Portsmouth, the University of Manchester and the Instituto de Astrofisica de Canarias (IAC).
GCN 37944 table
GRB_name GRB241029A
GCN_number 37944
Detection_method Optical
ra 325.3338°
decl 5.0814°
Circular_text TITLE: GCN CIRCULAR NUMBER: 37944 SUBJECT: GRB 241029A: AKO Optical Afterglow Detection DATE: 24/10/29 17:24:39 GMT FROM: Mohammad Odeh at Al Khatim Observatory M44 Mohammad Odeh (Al-Khatim Observatory, AKO, operated by the International Astronomical Center in Abu Dhabi, UAE), and Nidhal Guessoum (American University of Sharjah, UAE), report: We observed the field of GRB 241029A detected by Fermi/GBM (Fermi GBM team, GCN 37932), SVOM/ECLAIRs & SVOM/GRM (Schanne et al., GCN 37934; Wang et al., GCN 37935), with our 0.36m f/7.7 robotic telescope. The observation started on 29 October 2024 at 15:36 (UT), 13.3 hours from the trigger. We obtained multiple 180-sec exposures in Ic filter. We barely detected the optical afterglow at: R.A. (J2000): 21:41:20.11 Dec. (J2000): +05:04:53.2 Our detection is consistent with the results of (Jiang et al., GCN 37937; Lin et al., GCN 37939; Jiang et al., GCN 37940; Francile et al., GCN 37941; Ackley et al., GCN 37943). The following observation was calculated using Atlas catalogue as a reference: ---------------------------------------------------------------------------- - ObsTime (mid), Exposure (sec), Filter, Mag ---------------------------------------------------------------------------- - 2024-10-29T16:18:15Z, 28 x 180s (stacked), Ic, 19.9 +/- 0.32 ---------------------------------------------------------------------------- - The magnitude is not corrected for galactic extinction.
GCN 37945 table
GRB_name GRB241029A
GCN_number 37945
Detection_method Fermi GBM Det
t_trigger 2:19:59.870 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 37945 SUBJECT: GRB 241029A: Fermi GBM Observation DATE: 24/10/29 18:20:11 GMT FROM: Ava Myers at NASA GSFC A. Myers (NPP/GSFC), M. Godwin (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: At 02:19:59.87 UT on 29 October 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 241029A (trigger 751861204/241029097). which was also detected by SVOM/ECLAIRs (S. Schanne et al., GCN [37934](https://gcn.nasa.gov/circulars/37934)). The Fermi GBM on-ground location is consistent with the SVOM position. The angle from the Fermi LAT boresight is 76 degrees. The GBM light curve consists of multiple peaks with a duration (T90) of about 13.3 s (50-300 keV). The time-averaged spectrum from T0 to T0+13.152 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.01 +/- 0.04 and the cutoff energy, parameterized as Epeak, is 220 +/- 10 keV. The event fluence (10-1000 keV) in this time interval is (9.2 +/- 0.3)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0-0.064 s in the 10-1000 keV band is 9.6 +/- 0.4 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak= 190 +/- 20 keV, alpha = -0.96 +/- 0.05 and beta = -2.5 +/- 0.3. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/
GCN 37946 table
GRB_name GRB241029A
GCN_number 37946
Detection_method Swift-XRT Other
ra 325.3343°
decl 5.0814°
Circular_text TITLE: GCN CIRCULAR NUMBER: 37946 SUBJECT: GRB 241029A: Swift-XRT observations DATE: 24/10/29 18:39:18 GMT FROM: Phil Evans at U of Leicester M.G. Bernardini (INAF-OAB), E. Ambrosi (INAF-IASFPA) , D.N. Burrows (PSU), M. A. Williams (PSU), S. Dichiara (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), M. Capalbi (INAF-IASFPA) and P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team: Swift-XRT has performed follow-up observations of the SVOM/ECLAIRs-detected burst GRB 241029A, collecting 747 s of Photon Counting (PC) mode data between T0+29.1 ks and T0+30.0 ks. One uncatalogued X-ray source has been detected consistent with being within 434 arcsec of the SVOM/ECLAIRs position, it is below the RASS limit and shows no definitive signs of fading. The X-ray position is consistent with the optical transient reported by Jiang et al. (GCN 37937), Lin et al., (GCN 37939), Jiang et al. (GCN 37940), Francile et al. (GCN 37941), Ackley et al. (GCN 37943), Odeh et al. (GCN 37944). Source 1: RA (J2000): 325.3343 = 21:41:20.23 Dec (J2000): +5.0814 = +05:04:53.0 Error: 3.4 arcsec (radius, 90% conf. [Enhanced position]) Count-rate: 0.080 +/- 0.012 ct s^-1 Distance: 87 arcsec from SVOM/ECLAIRs position. Flux: (2.60 +/- 0.39)e-12 erg cm^-2 s^-1 (observed, 0.3-10 keV) The results of the XRT-team automatic analysis of the XRT observations, including a position-specific upper limit calculator, are available at https://www.swift.ac.uk/ToO_GRBs/00021726. This circular is an official product of the Swift-XRT team.
GCN 37948 table
GRB_name GRB241029A
GCN_number 37948
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 37948 SUBJECT: MISTRAL@OHP photometric and spectroscopic observations of GRB 241029A DATE: 24/10/29 22:13:27 GMT FROM: Christophe Adami at LAM C. Adami, S. Basa (LAM/Pytheas/AMU), E. Le Floc'h, D. Turpin, F. Schussler (CEA Paris-Saclay), J. Palmerio (GEPI, Obs. de Paris), B. Schneider (MIT), A. Saccardi (GEPI/Obs. de Paris & CEA Paris-Saclay), report on behalf of the MISTRAL GRB collaboration: We first performed imaging of the field of GRB 241029A (Fermi GBM team, GCN 37932; Schanne et al., GCN 37934; Chenwei Wang et al., GCN 37935; Evans et al., GCN 37936; Jiang et al., GCN 37937; Weikang Lin et al., GCN 37939; Jiang et al., GCN 37940; Francile et al., GCN 37941; Ackley et al., GCN 37943; Odeh et al., GCN 37944; Myers et al., GCN 37945; Bernardini et al., GCN 37946) with MISTRAL mounted on the 1.93 m telescope at Observatoire du Haut Provence (OHP, France). The observations consisted of 300s + 600s exposures in r-band plus 2x600s in g-band. We have very clear detections of the transient object both in g and r-band images: using as reference field stars from the Pan-STARRS catalogue, we determine preliminar magnitudes of r(AB) = 21.6 +/- 0.1 mag and g(AB) = 21.4 +/- 0.1 mag at a mean date of 2024-10-29T18:12:00 UT, ~16 hours after the burst. We immediately after took a spectrum of the object using the MISTRAL blue grism (end of data collection at 2024-10-29T19:45:21UT, ~17h30 after ther burst). Our spectrum cover the wavelength range 4200-8000 AA and consist of one exposure of 1500 seconds. We detect a weak but significant continuum between ~5700/5900 and ~6500AA and this suggests an upper limit of 3.7/3.9 for the redshift. We acknowledge the excellent support from Observatoire de Haute-Provence and in particular Yoann Degot-Longhi for the MISTRAL observations and Thomas Baycroft.
GCN 37950 table
GRB_name GRB241029A
GCN_number 37950
Detection_method Fermi GBM Other
redshift 1.0720
Circular_text TITLE: GCN CIRCULAR NUMBER: 37950 SUBJECT: GRB 241029A: GTC/OSIRIS+ spectroscopic redshift z=1.072 DATE: 24/10/29 23:35:55 GMT FROM: Antonio Martin-Carrillo at UCD,Space Science Group J. F. Agui Fernandez (CAHA), A. de Ugarte Postigo (LAM/OCA, CNRS), D. B. Malesani (DAWN/NBI and Radboud Univ.), A. Martin-Carrillo (UCD), G. Lombardi (GTC), C. C. Thoene (ASU-CAS, AbAO), N. R. Tanvir (U. Leicester), L. Izzo (INAF-OACn & DARK/NBI), S. Geier (GTC), D. Perez Valladares (GTC) report: We observed the afterglow of GRB 241029A (Fermi GBM team, GCN 37932; Schanne et al., GCN 37934; Chenwei Wang et al., GCN 37935; Evans et al., GCN 37936; Jiang et al., GCN 37937; Weikang Lin et al., GCN 37939; Jiang et al., GCN 37940; Francile et al., GCN 37941; Ackley et al., GCN 37943; Odeh et al., GCN 37944; Myers et al., GCN 37945; Bernardini et al., GCN 37946, Adami et al., GCN 37948) using OSIRIS+ on the 10.4 m GTC telescope, at the Roque de los Muchachos Observatory (La Palma, Spain). The observation consisted of 4 acquisition images in r-band, followed by a 4x1200 s spectrum. The spectrum was obtained with grism R1000B, covering the spectral range between 3650 and 7800 AA at a resolving power of 600. The acquisition image, obtained at 2024-10-29T21:32:51 UT, 19.21 hr since the Fermi trigger, shows the afterglow at r(AB) = 21.40 +/- 0.04 mag, as compared to SDSS field stars. The spectrum has a strong continuum throughout the complete range with absorption features due Fe II, FeII*, Mn II, Mg II, Mg I and the [O II] doublet at z = 1.072, which we propose as the redshift of GRB 241029A.
GCN 37954 table
GRB_name GRB241029A
GCN_number 37954
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37954 SUBJECT: GRB 241029A: SAO RAS optical observations DATE: 24/10/30 02:10:46 GMT FROM: Moskvitin Alexander at SAO RAS A. S. Moskvitin and O. I. Spiridonova (SAO RAS), report on behalf of the GRB follow-up team. We observed the field of GRB 241029A (Fermi GBM team, GCN 37932; Schanne et al., GCN 37934; Wang et al., GCN 37935; Myers and Godwin, GCN 37945; Bernardini et al., GCN 37946) with the 1-m telescope of SAO RAS equipped with the CCD-photometer. We obtained 6 x 300 sec. images in Rc band on October 29, 18:39:32--19:13:23 UT (16.6079 hours after the burst). The OT (Jiang et al., GCNs 37937, 37940; Lin et al., GCN 37939; Francile et al., GCN 37941; Ackley et al., 37943; Odeh and Guessoum, GCN 37944; Adami et al., GCN 37948; Fernandez et al., GCN 37950) is clearly detected in our stacked frame with the brightness of R = 20.98 +/- 0.05 (R_lim = 23.0). This preliminary photometry is based on nearby SDSS stars (magnitudes converted with Lupton 2005 equations) and not corrected for the Galaxy extinction.
GCN 37961 table
GRB_name GRB241029A
GCN_number 37961
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37961 SUBJECT: GRB 241029A: GROWTH-India Telescope optical follow up DATE: 24/10/30 10:03:34 GMT FROM: vishwajeet.s@iitb.ac.in A.P. Saikia, T. Mohan, V. Swain, R. Kumar, V. Bhalerao (IITB), G.C. Anupama, S. Barway (IIA) and K. Angail (IAO) report on behalf of the GIT team: We observed the field of GRB 241029A by Fermi/GBM (Fermi GBM team, GCN 37932), SVOM/ECLAIRs & SVOM/GRM (Schanne et al., GCN 37934; Wang et al., GCN 37935) with 0.7m GROWTH-India Telescope (GIT). We started the observation at 2024-10-29 14:08:55 UT, i.e., 11.8 hours after the Fermi GBM trigger. We obtained multiple exposures of 360 seconds in r' filter. We clearly detected the afterglow in our stacked image at the positions given by TRT (Jiang et. al., GCN 37937). The photometry result follows as: --------------------------------------------------------------------------------- | JD (mid) | t-t0 (hours) | Filter | Total Exposure (s) | Magnitude (AB) | | ----------------- | ----------- |------- | ------------------ | -------------- | | 2460613.16666 | 13.6 | r' | 6x360 | 20.97 +/- 0.10 | --------------------------------------------------------------------------------- Our result is consistent with Jiang et al., (GCN 37937), Lin et al., (GCN 37939), Jiang et al., (GCN 37940), Francile et al., (GCN 37941), Ackley et al., (GCN 37943), Odeh et al., (GCN 37944), Moskvitin et al., (GCN 37954). The measurement is calibrated against PanSTARRS DR1 (Chambers et al., 2016) and not corrected for Galactic extinction. The GROWTH India Telescope (GIT; Kumar et al. 2022) is a 70-cm telescope with a 0.7-degree field of view, set up by the Indian Institute of Astrophysics (IIA) and the Indian Institute of Technology Bombay (IITB) with funding from DST-SERB and IUSSTF. It is located at the Indian Astronomical Observatory (Hanle), operated by IIA. We acknowledge funding by the IITB alumni batch of 1994, which partially supports the operations of the telescope. Telescope technical details are available at https://sites.google.com/view/growthindia/.
GCN 37994 table
GRB_name GRB241029A
GCN_number 37994
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37994 SUBJECT: GRB 241029A: SVOM/VT optical afterglow observations DATE: 24/10/31 00:13:56 GMT FROM: SVOM_group SVOM/VT commissioning team: Y. L. Qiu, H. L. Li, C. Wu, L. P. Xin, X. H. Han, J. Wang, W. J. Xie, H. B. Cai, Y. Xu, Y. J. Xiao, P. P. Zhang, J. S. Deng, L. Lan, X. M. Lu, R. S. Zhang, (NAOC), J. Zhang, L. J. Dan, G. Y. Zou, C. J. Wang, Y. F. Du, C. Huang (XIOPM), H. Zhou (PMO), S. L. Xiong(IHEP) SVOM JSWG: Jian-Yan Wei (NAOC), Bertrand Cordier (CEA), Shuang-Nan Zhang (IHEP), Stéphane Basa (LAM), Olivier Godet (IRAP), Arnaud Claret (CEA), Zi-Gao Dai (USTC), Frédéric Daigne (IAP), Jin-Song Deng (NAOC), 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), Bing Zhang (UNLV) report on behalf of the SVOM team: VT started to observe the field of GRB 241029A triggered by Fermi/GBM (Fermi GBM team, GCN 37932) and SVOM/ECLAIRs & SVOM/GRM (Schanne et al., GCN 37934; Wang et al., GCN 37935) via ToO observations started at 2024-10-29T21:41:18.43, about 19.2 hours after the burst. The VT conducted observations simultaneously in two channels: VT_B (400nm-650nm) and VT_R (650nm-1000nm). The counterpart (Jiang et. al. GCNa 37937; Lin et al., GCN 37939; Jiang et al., GCN 37940; Francile et al., GCN 37941; Ackley et al., GCN 37943; Odeh et al., GCN 37944; Moskvitin et al., GCN 37954; Saikia et al.,GCN 37961) was detected in both bands with VT_B=23.3+/-0.3 mag and VT_R=21.8+/-0.12 mag with a 2.2 ks exposed time of VT. 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. VT was jointly developed by Xi'an Institute of Optics and Precision Mechanics (XIOPM), CAS and National astronomical observatories (NAOC),CAS.
GCN 38006 table
GRB_name GRB241029A
GCN_number 38006
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 38006 SUBJECT: GRB 241029A: LCO optical detection DATE: 24/10/31 12:14:05 GMT FROM: Daniele B. Malesani at IMAPP / Radboud University L. Izzo (INAF-OACn and DARK/NBI) and D. B. Malesani (DAWN/NBI and Radboud Univ.) report: We observed the field of the GRB 241029A (Schanne et al., GCN #37934; Wang et al., GCN #37935; Myers & Godwin, GCN 37945) with the Sinistro instrument mounted on the 1-m telescope of the LCO network, located at the Siding Spring Observatory, Australia. Observations started on 2024 October 29 at 09:21:56 UT (7.03 hr after the GRB trigger). We obtained a sequence of 3x180 s images in the SDSS-r filter. In the stacked r-band image, we clearly detect the optical afterglow previously reported by other facilities (Jiang et al., GCN #37937; Lin et al., GCN #37939; Jiang et al., GCN #37940; Francile et al., GCN #37941; Ackley et al., GCN #37943; Odeh et al., GCN #37944; Adami et al., GCN #37948; Agui Fernandez et al., GCN #37950; Moskvitin & Spiridonova, GCN #37954; Saikia et al., GCN #37961; Qiu et al., GCN #37994) and by Swift-XRT (Bernardini et al., GCN #37946). We measure a preliminary magnitude of r = 20.32 +/- 0.07 mag (AB), calibrated against nearby stars from the Pan-STARRS catalog. This project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 101004719.
GCN 38009 table
GRB_name GRB241029A
GCN_number 38009
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 38009 SUBJECT: GRB 241029A: COLIBRI Detection of the Optical Counterpart DATE: 24/10/31 13:28:54 GMT FROM: Alan Watson at UNAM Alan M. Watson (UNAM), Stéphane Basa (UAR Pytheas), William H. Lee (UNAM), D. Akl (AUS), S. Antier (OCA), Jean-Luc Atteia (IRAP), Nathaniel R. Butler (ASU), Damien Dornic (CPPM), J.-G. Ducoin (CPPM), Francis Fortin (IRAP), Simona Lombardo (LAM), Francesco Magnani (CPPM), and Margarita Pereyra (UNAM) SVOM JSWG: Jian-Yan Wei (NAOC), Bertrand Cordier (CEA), Shuang-Nan Zhang (IHEP), Stéphane Basa (LAM), Jean-Luc Atteia (IRAP), Arnaud Claret (CEA), Zi-Gao Dai (USTC), Frédéric Daigne (IAP), Jin-Song Deng (NAOC), 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), Bing Zhang (UNLV) report: We imaged again the field of GRB 241029A detected by Fermi/GBM, SVOM/ECLAIRs, and SVOM/GRM (Fermi GBM Team, GCN Circ. 37932; Schanne et al., GCN Circ. 37956; Wang et al., GCN Circ. 37935) during the commissioning of the COLIBRÍ (SVOM/F-GFT) telescope at the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir in Mexico. We observed with the engineering test camera in a red filter that approximates SDSS r. The data were reduced using custom software and then analysed and calibrated against the PS1 catalog using the STDWeb service (Karpov et al. 2022). In 4560 seconds of exposure from 2024-10-30 02:10 to 06:12 UTC (0.99 to 1.16 days after the trigger), we detect the optical counterpart (Jiang et al, GCN Circ. 37937) with an AB magnitude of: r = 21.78 +/- 0.15 This magnitude is consistent with the last optical observations reported (Agui Fernandez et al., GCN Circ. 37950, Moskvitin et al., GCN Circ. 37954; Qiu et al., GCN Circ. 37994). We warmly thank the COLIBRI engineering team and the staff of the Observatorio Astronómico Nacional on the Sierra de San Pedro Mártir
GCN 38048 table
GRB_name GRB241029A
GCN_number 38048
Detection_method Fermi GBM Det
t_trigger 2:19:59.800 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 38048 SUBJECT: GRB 241029A: GRBAlpha detection DATE: 24/11/02 19:24:49 GMT FROM: Marianna Dafčíková at Masaryk University <500025@mail.muni.cz> M. Dafcikova, J. Ripa, M. Kolar (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Duriskova, L. Szakszonova, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration. The long-duration GRB 241029A (Fermi/GBM detection: GCN 37932; SVOM/GRM detection: GCN 37935) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023, A&A, 677, 40; https://ui.adsabs.harvard.edu/abs/2023A%26A...677A..40P/abstract). The detection was confirmed at the peak time 2024-10-29 02:19:59.8 UTC. The T90 duration measured by GRBAlpha is 10.5 s and the overall significance during T90 reaches 10.5 sigma. The light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB241029A_GCN.pdf All GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/ GRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume.
GCN 38669 table
GRB_name GRB241029A
GCN_number 38669
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 38669 SUBJECT: GRB 241029A: AbAO AS-32 optical observations DATE: 24/12/25 07:22:16 GMT FROM: Nicolai Pankov at HSE, IKI RAS N. Pankov (HSE, IKI), R. Ya. Inasaridze (AbAO), A. Pozanenko (IKI) report on behalf of IKI-GRB-FuN: We performed optical observations of the field of GRB 241029A (The Fermi GBM team, GCN 37932; Schanne et. al, GCN 37934; Wang et. al, GCN 37935; Evans, GCN 37936; Jiang et. al, GCN 37937; Lin et. al, GCN 37939; Jiang et. al, GCN 37940; C.Francile et. al, GCN 37941; Ackley et. al, GCN 37943; Odeh et. al, GCN 37944; Myers et. al, GCN 37945; Bernardini et. al, GCN 37946; Adami et. al, GCN 37948; Fernandez et. al, GCN 37950; Moskvitin et. al, GCN 37954; Saikia et. al, GCN 37961; Qiu et. al, GCN 37994; Izzo, GCN 38006; Watson et. al, GCN 38009; Dafcikova et. al, GCN 38048) in the R filter with AS-32 of Abastumani observatory (AbAO) equipped with CCD-photometer FLI PL4240. The observations began on 2024-10-29 15:10 UT, i.e. ~0.55 days since trigger. The optical counterpart is marginally detected in the stacked image of 43*60 sec. The preliminary photometry is given below: Date UT start t-T0 Exp. Filter OT Err. UL(3sigma) (mid, days) (s) 2024-10-29 15:10:45 0.550185 43*60 R 20.9 0.3 20.9 The magnitudes were calibrated using nearby stars from USNO-B1.0 (R2 magnitudes) and are not corrected for the Galactic extinction.