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

[vsnet-grb-info 35560] GRB 240930A: Fermi GBM Final Real-time Localization
by GCN Circulars 30 Sep '24

30 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37633 SUBJECT: GRB 240930A: Fermi GBM Final Real-time Localization DATE: 24/09/30 04:18:32 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 04:07:53 UT on 30 Sep 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240930A (trigger 749362078.832228 / 240930172). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 190.7, Dec = -81.9 (J2000 degrees, equivalent to J2000 12h 42m, -81d 54'), with a statistical uncertainty of 1.0 degrees. The angle from the Fermi LAT boresight is 90.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240930172/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240930172/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240930172/… View this GCN Circular online at https://gcn.nasa.gov/circulars/37633. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 35559] Fermi trigger No 749339671: Global MASTER-Net observations report
by GCN Circulars 30 Sep '24

30 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37632 SUBJECT: Fermi trigger No 749339671: Global MASTER-Net observations report DATE: 24/09/30 01:15:41 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) 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 GRB240929.91 (trigger No 749339671,06h 19m 00.00s , -67d 34m 48.0s, R=1) errorbox 2792 sec after notice time and 2824 sec after trigger time at 2024-09-29 22:41:30 UT, with upper limit up to 18.0 mag. The observations began at zenith distance = 59 deg. The sun altitude is -55.1 deg. The galactic latitude b = -28 deg., longitude l = 278 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2619337 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 2854 | 2024-09-29 22:41:30 | MASTER-SAAO | (06h 17m 46.50s , -67d 09m 07.7s) | C | 60 | 17.2 | 2933 | 2024-09-29 22:42:50 | MASTER-SAAO | (06h 38m 24.53s , -67d 08m 42.2s) | C | 60 | 18.0 | 3013 | 2024-09-29 22:44:09 | MASTER-SAAO | (06h 07m 56.31s , -69d 04m 13.1s) | C | 60 | 16.3 | 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/37632. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 35558] Fermi Gamma-ray Burst Monitor trigger 749339671/240929913 is not a GRB
by GCN Circulars 30 Sep '24

30 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37631 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 749339671/240929913 is not a GRB DATE: 24/09/30 00:04:10 GMT FROM: Cori Fletcher at USRA <cfletcher(a)usra.edu> C. Fletcher (USRA) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 749339671/240929913 at 21:54:26.68 UT on 29 September 2024, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to local particles." View this GCN Circular online at https://gcn.nasa.gov/circulars/37631. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 35557] GRB 240929A long GRB detected by INTEGRAL
by GCN Circulars 29 Sep '24

29 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37630 SUBJECT: GRB 240929A long GRB detected by INTEGRAL DATE: 24/09/29 21:00:52 GMT FROM: Sandro Mereghetti at IASF-Milano/INAF <sandro.mereghetti(a)inaf.it> S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC, Versoix) and J.Borkowski (CAMK, Torun) report: a gamma ray burst lasting about 20 s has been detected by IBAS in the IBIS/ISGRI data at 19:50:02 UT of 2024 September 29. The refined coordinates (J2000) are: R.A.= 2.4233 deg DEC.= 74.8275 deg with an uncertainty of 2 arcmin (90% c.l.). A preliminary analysis gives a peak flux of about 5 ph/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 3e-6 erg/cmq. Due to telemetry saturation, these values should be considered as lower limits. This burst has also been detected by Fermi/GBM (GCN 37627). A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html View this GCN Circular online at https://gcn.nasa.gov/circulars/37630. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 35556] GRB 240929A: BALROG localization (Fermi Trigger 749332209 / GRB 240929826)
by GCN Circulars 29 Sep '24

29 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37629 SUBJECT: GRB 240929A: BALROG localization (Fermi Trigger 749332209 / GRB 240929826) DATE: 24/09/29 20:37:46 GMT FROM: Jochen Greiner at MPE <jcgrog(a)mpe.mpg.de> T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report: The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 749332209 at 19:50:04 on 29 Sept. 2024 were automatically fitted for spectrum and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427; Berlato et al. 2019, ApJ 873, 60). The best-fit position is: RA(2000.0) = 359.0 deg Decl.(2000.0) = 75.4 deg The 1 sigma statistical error radius is 2.5 deg. We estimate an additional systematic error of 1 deg. Further details are available at: https://grb.mpe.mpg.de/grb/GRB240929826/ The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB240929826/healpix The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB240929826/json View this GCN Circular online at https://gcn.nasa.gov/circulars/37629. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 35555] Fermi GRB 240929A: Global MASTER-Net observations report
by GCN Circulars 29 Sep '24

29 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37628 SUBJECT: Fermi GRB 240929A: Global MASTER-Net observations report DATE: 24/09/29 20:30:35 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the Fermi GRB 240929A ( Fermi GBM team, GCN 37627) errorbox 21 sec after notice time and 55 sec after trigger time at 2024-09-29 19:50:59 UT, with upper limit up to 17.9 mag. The observations began at zenith distance = 32 deg. The sun altitude is -43.0 deg. The galactic latitude b = 13 deg., longitude l = 119 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2619216 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 60 | 2024-09-29 19:50:59 | MASTER-Tavrida | (00h 07m 38.65s , +74d 41m 45.4s) | P/ | 10 | 15.9 | 378 | 2024-09-29 19:55:47 | MASTER-Tavrida | (00h 07m 39.07s , +74d 41m 46.6s) | P/ | 70 | 17.1 | 520 | 2024-09-29 19:57:59 | MASTER-Tavrida | (00h 07m 38.99s , +74d 41m 46.3s) | P/ | 90 | 17.3 | 692 | 2024-09-29 20:00:30 | MASTER-Tavrida | (00h 07m 38.85s , +74d 41m 45.2s) | P/ | 130 | 17.7 | 898 | 2024-09-29 20:03:42 | MASTER-Tavrida | (00h 07m 38.77s , +74d 41m 43.8s) | P/ | 160 | 17.6 | 1130 | 2024-09-29 20:07:24 | MASTER-Tavrida | (00h 07m 38.90s , +74d 41m 43.2s) | P/ | 180 | 17.6 | 1373 | 2024-09-29 20:11:27 | MASTER-Tavrida | (00h 07m 39.18s , +74d 41m 43.7s) | P/ | 180 | 17.8 | 1616 | 2024-09-29 20:15:29 | MASTER-Tavrida | (00h 07m 39.36s , +74d 41m 45.4s) | P/ | 180 | 17.7 | 1859 | 2024-09-29 20:19:33 | MASTER-Tavrida | (00h 07m 39.49s , +74d 41m 48.9s) | P/ | 180 | 17.9 | The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/37628. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 35554] GRB 240929A: Fermi GBM Final Real-time Localization
by GCN Circulars 29 Sep '24

29 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37627 SUBJECT: GRB 240929A: Fermi GBM Final Real-time Localization DATE: 24/09/29 20:00:32 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 19:50:04 UT on 29 Sep 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240929A (trigger 749332209.094252 / 240929826). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 356.1, Dec = 75.0 (J2000 degrees, equivalent to J2000 23h 44m, 75d 00'), with a statistical uncertainty of 1.4 degrees. The angle from the Fermi LAT boresight is 108.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240929826/… The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240929826/… The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240929826/… View this GCN Circular online at https://gcn.nasa.gov/circulars/37627. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 35553] Integral GRB240929.83: Global MASTER-Net observations report
by GCN Circulars 29 Sep '24

29 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37626 SUBJECT: Integral GRB240929.83: Global MASTER-Net observations report DATE: 24/09/29 19:57:32 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov(a)xray.sai.msu.ru> V. Lipunov, V.Kornilov, E. Gorbovskoy, K. Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, V.Senik, D. Vlasenko, G.Antipov, D.Zimnukhov, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D. Cheryasov, Ya.Kechin, Yu.Tselik, A. Sosnovskij (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gress, N.M. Budnev, O.Ershova (Irkutsk State University, API), L.Carrasco, J.R.Valdes, V.Chavushyan, V.M.Patino Alvarez, J.Martinez, A.R.Corella, L.H.Rodriguez (INAOE, Guillermo Haro Astrophysics Observatory), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich (Blagoveschensk Educational State University) MASTER-Tavrida robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the Integral GRB240929.83 (trigger No 10928,00h 09m 36.49s , +74d 49m 16.9s, R=0.048) errorbox 18 sec after notice time and 53 sec after trigger time at 2024-09-29 19:50:59 UT, with upper limit up to 15.9 mag. The observations began at zenith distance = 32 deg. The sun altitude is -43.0 deg. The galactic latitude b = 12 deg., longitude l = 120 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2619163 We obtain a following upper limits. Tmid-T0 | Site |Filt.| Expt. | Limit| Comment _________|_____________________|_____|_______|______|________ 59 | MASTER-Tavrida | P/ | 10 | 15.9 | The observation and reduction will continue. The message may be cited. View this GCN Circular online at https://gcn.nasa.gov/circulars/37626. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 35552] IceCube-240929A - IceCube observation of a high-energy neutrino candidate track-like event
by GCN Circulars 29 Sep '24

29 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37625 SUBJECT: IceCube-240929A - IceCube observation of a high-energy neutrino candidate track-like event DATE: 24/09/29 14:52:14 GMT FROM: Erik Blaufuss at University of Maryland, College Park <blaufuss(a)umd.edu> The IceCube Collaboration (http://icecube.wisc.edu/) reports: On 2024-09-29 at 09:55:54.03 UT IceCube detected a track-like event with a high probability of being of astrophysical origin. The event was selected by the ICECUBE_Astrotrack_GOLD alert stream. The average astrophysical neutrino purity for Gold alerts is 50%. This alert has an estimated false alarm rate of 0.7553 events per year due to atmospheric backgrounds. The IceCube detector was in a normal operating state at the time of detection. After the initial automated alert (https://gcn.gsfc.nasa.gov/notices_amon_g_b/139912_46959751.amon), more sophisticated reconstruction algorithms have been applied offline, with the direction refined to: Date: 2024-06-29 Time: 09:55:54.03 UT RA: 180.66 (+0.57, -0.71 deg 90% PSF containment) J2000 Dec: 18.92 (+0.55, -0.54 deg 90% PSF containment) J2000 No Fermi 4FGL or 3FHL catalog source are in the 90% uncertainty region. However, given the promising characteristics of the candidate neutrino event, we encourage follow-up by ground and space-based instruments to help identify a possible astrophysical source associated with it. The IceCube Neutrino Observatory is a cubic-kilometer neutrino detector operating at the geographic South Pole, Antarctica. The IceCube realtime alert point of contact can be reached at roc(a)icecube.wisc.edu View this GCN Circular online at https://gcn.nasa.gov/circulars/37625. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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[vsnet-grb-info 35551] Konus-Wind detection of GRB 240912A
by GCN Circulars 29 Sep '24

29 Sep '24

TITLE: GCN CIRCULAR NUMBER: 37624 SUBJECT: Konus-Wind detection of GRB 240912A DATE: 24/09/29 14:14:30 GMT FROM: Dmitry Svinkin at Ioffe Institute <svinkin(a)mail.ioffe.ru> D. Svinkin, D. Frederiks, M. Ulanov, A. Tsvetkova, A. Lysenko, A. Ridnaia, and T. Cline on behalf of the Konus-Wind team, report: The long-duration GRB 240912A (Fermi-GBM detection: The Fermi GBM Team, GCN 37465; Smith and Meegan, GCN 37478; Swift-BAT detection: Evans et al., GCN 37466; Parsotan et al., GCN 37539; INTEGRAL-SPI-ACS detection: Pawar et al., GCN 37473; SVOM-GRM detection: Zheng et al., GCN 37484) triggered Konus-Wind at T0 = 6454.746 s UT (01:47:34.746). The burst light curve shows a multipeaked structure which starts at ~T0-60 s and has a total duration of ~118 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/GRB240912_T06454/ As observed by Konus-Wind, the burst had a fluence of 9.57(-0.96,+0.88)x10^-5 erg/cm2, and a 64-ms peak flux, measured from T0+2.496 s, of 7.32(-1.90,+1.87)x10^-6 erg/cm2/s (both in the 20 keV - 10 MeV energy range). The time-averaged spectrum of the burst (measured from T0 to T0+60.928 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -1.36(-0.11,+0.12), the high energy photon index beta = -2.44(-0.54,+0.18), the peak energy Ep = 196(-27,+37) keV (chi2 = 90/96 dof). The spectrum near the maximum count rate (measured from T0+0.256 s to T0+6.144 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -1.12(-0.15,+0.16), the high energy photon index beta = -2.59(-7.41,+0.35), the peak energy Ep = 358(-77,+124) keV (chi2 = 89/72 dof). Assuming the redshift z=1.234 (de Ugarte Postigo et al., GCN 37469) and a standard cosmology with H_0 = 67.3 km/s/Mpc, Omega_M = 0.315, and Omega_Lambda = 0.685 (Planck Collaboration, 2014), we estimate the following rest-frame parameters: the isotropic energy release E_iso is 4.0(-0.4,+0.4)x10^53 erg, the peak luminosity L_iso is 6.8(-1.8,+1.7)x10^52 erg/s, the rest-frame peak energy of the time-averaged spectrum Ep,i,z is 437(-60,+82) keV, and the spectrum near the maximum count rate Ep,p,z is 799(-172,+277) keV. With the obtained estimates, GRB 240912A is inside 68% prediction bands for 'Amati' and 'Yonetoku' relations, for the sample of >300 long KW GRBs with known redshifts (Tsvetkova et al., 2017; Tsvetkova et al., 2021), see http://www.ioffe.ru/LEA/GRBs/GRB240912_T06454/GRB240912A_rest_frame.pdf 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/37624. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0L…

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