GRB210904A

This page lists all entries on GRB210904A in GRBweb

Summary Fermi GBM GCN 30763 GCN 30764

Summary table
Variable Value Source
GRB_name_Fermi GRB210904866
T0 20:47:38.927 UTC Fermi_GBM
ra 124.6500° Fermi_GBM
decl -42.2000° Fermi_GBM
pos_error 8.13e+00° Fermi_GBM
T90 3.904 s Fermi_GBM
T90_error 2.099 s Fermi_GBM
T90_start 20:47:38.927 UTC Fermi_GBM
fluence 5.64e-07 erg/cm² Fermi_GBM
fluence_error 4.92e-08 erg/cm² Fermi_GBM
T100 3.904 s
GBM_located True
mjd 59461.8664227662 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB210904866
trigger_name bn210904866
ra 124.6500°
decl -42.2000°
pos_error 8.13e+00°
datum 2021-09-04
t_trigger 20:47:39.631 UTC
T90 3.904 s
T90_error 2.099 s
T90_start 20:47:38.927 UTC
fluence 5.64e-07 erg/cm²
fluence_error 4.92e-08 erg/cm²
flux_1024 3.16e+00 erg/cm²/s
flux_1024_error 2.99e-01 erg/cm²/s
flux_1024_time 5.76e-01 erg/cm²/s
flux_64 6.13e+00 erg/cm²/s
flux_64_error 1.63e+00 erg/cm²/s
GCN 30763 table
GRB_name GRB210904A
GCN_number 30763
Detection_method Fermi GBM final loc
t_trigger 20:47:39 UTC
ra 121.1000°
decl -44.0000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 30763 SUBJECT: GRB 210904A: Fermi GBM Final Real-time Localization DATE: 21/09/04 20:58:06 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely SHORT GRB At 20:47:39 UT on 4 Sep 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210904A (trigger 652481264.630844 / 210904866). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 121.1, Dec = -44.0 (J2000 degrees, equivalent to J2000 08h 04m, -44d 00'), with a statistical uncertainty of 9.2 degrees. The angle from the Fermi LAT boresight is 104.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210904866/quicklook/glg_skymap_all_bn210904866.png The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210904866/quicklook/glg_healpix_all_bn210904866.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210904866/quicklook/glg_lc_medres34_bn210904866.gif
GCN 30764 table
GRB_name GRB210904A
GCN_number 30764
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 30764 SUBJECT: Fermi GRB 210904A: Global MASTER-Net observations report DATE: 21/09/05 00:15:17 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov, D. Cheryasov (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. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (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 GRB 210904A ( Fermi GBM team, GCN 30763) errorbox 8467 sec after notice time and 8548 sec after trigger time at 2021-09-04 23:10:08 UT, with upper limit up to 18.4 mag. The observations began at zenith distance = 81 deg. The sun altitude is -63.8 deg. The galactic latitude b = -6 deg., longitude l = 260 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1709787 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 8579 | 2021-09-04 23:10:08 | MASTER-SAAO | (07h 13m 56.09s , -50d 06m 24.2s) | C | 60 | 17.5 | 8818 | 2021-09-04 23:14:07 | MASTER-SAAO | (07h 19m 10.91s , -51d 59m 24.1s) | C | 60 | 17.7 | 9296 | 2021-09-04 23:22:05 | MASTER-SAAO | (07h 08m 22.61s , -48d 12m 57.4s) | C | 60 | 17.8 | 9376 | 2021-09-04 23:23:25 | MASTER-SAAO | (07h 38m 53.16s , -53d 54m 13.5s) | C | 60 | 17.9 | 9536 | 2021-09-04 23:26:05 | MASTER-SAAO | (07h 13m 58.12s , -50d 07m 33.3s) | C | 60 | 17.8 | 9775 | 2021-09-04 23:30:04 | MASTER-SAAO | (07h 19m 06.81s , -51d 59m 26.1s) | C | 60 | 17.8 | 9854 | 2021-09-04 23:31:23 | MASTER-SAAO | (07h 32m 12.17s , -51d 59m 49.4s) | C | 60 | 17.7 | 10014 | 2021-09-04 23:34:03 | MASTER-SAAO | (07h 04m 54.17s , -46d 20m 01.5s) | C | 60 | 18.0 | 10253 | 2021-09-04 23:38:02 | MASTER-SAAO | (07h 08m 27.37s , -48d 12m 23.6s) | C | 60 | 18.1 | 10333 | 2021-09-04 23:39:22 | MASTER-SAAO | (07h 20m 20.55s , -48d 12m 41.9s) | C | 60 | 17.8 | 10412 | 2021-09-04 23:40:41 | MASTER-SAAO | (07h 38m 52.71s , -53d 52m 36.0s) | C | 60 | 18.0 | 10492 | 2021-09-04 23:42:01 | MASTER-SAAO | (07h 52m 31.79s , -53d 52m 56.7s) | C | 60 | 18.0 | 10651 | 2021-09-04 23:44:40 | MASTER-SAAO | (07h 13m 59.74s , -50d 08m 01.5s) | C | 60 | 18.1 | 10890 | 2021-09-04 23:48:40 | MASTER-SAAO | (07h 19m 12.08s , -52d 00m 03.6s) | C | 60 | 18.2 | 10970 | 2021-09-04 23:49:59 | MASTER-SAAO | (07h 32m 06.04s , -52d 00m 12.5s) | C | 60 | 18.0 | 11130 | 2021-09-04 23:52:39 | MASTER-SAAO | (07h 04m 54.64s , -46d 19m 44.5s) | C | 60 | 18.3 | 11369 | 2021-09-04 23:56:38 | MASTER-SAAO | (07h 08m 23.65s , -48d 12m 55.9s) | C | 60 | 18.4 | 11449 | 2021-09-04 23:57:58 | MASTER-SAAO | (07h 20m 23.73s , -48d 13m 57.4s) | C | 60 | 18.1 | 11528 | 2021-09-04 23:59:17 | MASTER-SAAO | (07h 38m 57.95s , -53d 53m 04.8s) | C | 60 | 18.3 | 11608 | 2021-09-05 00:00:37 | MASTER-SAAO | (07h 52m 26.26s , -53d 53m 22.3s) | C | 60 | 18.0 | 11691 | 2021-09-05 00:02:00 | MASTER-SAAO | (07h 25m 12.86s , -50d 06m 49.5s) | C | 60 | 18.2 | 11771 | 2021-09-05 00:03:20 | MASTER-SAAO | (07h 37m 35.60s , -50d 07m 15.3s) | C | 60 | 18.0 | 11850 | 2021-09-05 00:04:39 | MASTER-SAAO | (07h 43m 49.99s , -51d 59m 23.6s) | C | 60 | 17.9 | 11930 | 2021-09-05 00:05:59 | MASTER-SAAO | (07h 56m 49.28s , -52d 00m 07.8s) | C | 60 | 17.9 | 12010 | 2021-09-05 00:07:19 | MASTER-SAAO | (07h 31m 08.10s , -48d 12m 41.2s) | C | 60 | 18.1 | 12089 | 2021-09-05 00:08:39 | MASTER-SAAO | (07h 43m 08.49s , -48d 11m 09.0s) | C | 60 | 17.8 | 12169 | 2021-09-05 00:09:58 | MASTER-SAAO | (07h 48m 48.15s , -50d 06m 50.2s) | C | 60 | 17.8 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.