GRB240930A

This page lists all entries on GRB240930A in GRBweb

Summary GCN 37633 GCN 37635 GCN 37636 GCN 37682

Summary table
Variable Value Source
T0 4:07:53 UTC GCN_circulars,Fermi GBM final loc
ra 190.7000° GCN_circulars,Fermi GBM final loc
decl -81.9000° GCN_circulars,Fermi GBM final loc
GBM_located True
mjd 60583.1721412037 GCN_circulars,Fermi GBM final loc
GCN 37633 table
GRB_name GRB240930A
GCN_number 37633
Detection_method Fermi GBM final loc
t_trigger 4:07:53 UTC
ra 190.7000°
decl -81.9000°
Circular_text 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 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/quicklook/glg_skymap_all_bn240930172.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/bn240930172/quicklook/glg_healpix_all_bn240930172.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240930172/quicklook/glg_lc_medres34_bn240930172.gif
GCN 37635 table
GRB_name GRB240930A
GCN_number 37635
Detection_method Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 37635 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 749362078/240930172 (GRB 240930A) is not a GRB DATE: 24/09/30 04:58:04 GMT FROM: Cori Fletcher at USRA C. Fletcher (USRA) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 749362078/240930172 (GRB 240930A; GCN 37631) at 04:07:53.83 UT on 30 September 2024, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to local particles."
GCN 37636 table
GRB_name GRB240930A
GCN_number 37636
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 37636 SUBJECT: Fermi GRB 240930A: Global MASTER-Net observations report DATE: 24/09/30 05:00:35 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs 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-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) started inspect of the Fermi GRB 240930A ( Fermi GBM team, GCN 37633) errorbox 592 sec after notice time and 604 sec after trigger time at 2024-09-30 04:17:58 UT, with upper limit up to 19.9 mag. The observations began at zenith distance = 66 deg. The sun altitude is -56.1 deg. The galactic latitude b = -19 deg., longitude l = 303 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2619664 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 664 | 2024-09-30 04:17:58 | MASTER-OAFA | (11h 40m 44.68s , -82d 44m 35.9s) | C | 120 | 18.4 | 665 | 2024-09-30 04:17:58 | MASTER-OAFA | (12h 46m 17.12s , -82d 00m 09.9s) | C | 120 | 19.9 | 819 | 2024-09-30 04:20:17 | MASTER-OAFA | (11h 40m 41.23s , -82d 44m 37.7s) | C | 150 | 18.5 | 819 | 2024-09-30 04:20:18 | MASTER-OAFA | (12h 46m 15.24s , -82d 00m 12.8s) | C | 150 | 19.9 | 1004 | 2024-09-30 04:23:07 | MASTER-OAFA | (11h 40m 38.32s , -82d 44m 40.7s) | C | 180 | 18.3 | 1004 | 2024-09-30 04:23:07 | MASTER-OAFA | (12h 46m 13.12s , -82d 00m 16.7s) | C | 180 | 19.6 | 1203 | 2024-09-30 04:26:27 | MASTER-OAFA | (11h 40m 35.13s , -82d 44m 45.0s) | C | 180 | 18.6 | 1204 | 2024-09-30 04:26:27 | MASTER-OAFA | (12h 46m 10.84s , -82d 00m 21.1s) | C | 180 | 19.9 | 1403 | 2024-09-30 04:29:46 | MASTER-OAFA | (11h 40m 32.39s , -82d 44m 49.6s) | C | 180 | 18.5 | 1403 | 2024-09-30 04:29:47 | MASTER-OAFA | (12h 46m 08.46s , -82d 00m 25.2s) | C | 180 | 19.9 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.
GCN 37682 table
GRB_name GRB240930A
GCN_number 37682
Detection_method Optical
Circular_text TITLE: GCN CIRCULAR NUMBER: 37682 SUBJECT: EP240930a: Liverpool Telescope observations DATE: 24/10/02 13:52:57 GMT FROM: A. Bochenek at Liverpool John Moores University A. Bochenek, D. A. Perley (LJMU) report: We observed the field of the X-ray transient EP240930a (Tian et al. GCN 37648) possibly associated with GRB240930a (Fermi GBM team, GCN 37633) using the IO:O optical camera on the 2m robotic Liverpool Telescope. We obtained 5x120s exposures with the SDSS-r filter starting at 2024-10-01 20:37:49 UT, approximately 27.3 hours after the EP trigger. The images were stacked and a reference image of the field from Pan-STARRS was subtracted using PSF matching with the help of PSFEx. No uncatalogued optical source was detected within the 90% confidence 10 arcsec EP/FXT error-circle. The 3-sigma limiting magnitude on the subtracted image is r > 22.16 mag.