GRB210420A

This page lists all entries on GRB210420A in GRBweb

Summary Fermi GBM GCN 29837 GCN 29855

Summary table
Variable Value Source
GRB_name_Fermi GRB210420215
T0 5:09:25.364 UTC Fermi_GBM
ra 253.3900° Fermi_GBM
decl 12.2500° Fermi_GBM
pos_error 1.19e+01° Fermi_GBM
T90 29.44 s Fermi_GBM
T90_error 2.56 s Fermi_GBM
T90_start 5:09:25.364 UTC Fermi_GBM
fluence 5.12e-07 erg/cm² Fermi_GBM
fluence_error 3.20e-08 erg/cm² Fermi_GBM
T100 29.44 s
GBM_located True
mjd 59324.21487689815 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB210420215
trigger_name bn210420215
ra 253.3900°
decl 12.2500°
pos_error 1.19e+01°
datum 2021-04-20
t_trigger 5:09:29.204 UTC
T90 29.44 s
T90_error 2.56 s
T90_start 5:09:25.364 UTC
fluence 5.12e-07 erg/cm²
fluence_error 3.20e-08 erg/cm²
flux_1024 8.40e-01 erg/cm²/s
flux_1024_error 1.55e-01 erg/cm²/s
flux_1024_time -2.82e+00 erg/cm²/s
flux_64 2.87e+00 erg/cm²/s
flux_64_error 1.17e+00 erg/cm²/s
GCN 29837 table
GRB_name GRB210420A
GCN_number 29837
Detection_method Fermi GBM final loc
t_trigger 5:09:29 UTC
ra 253.4000°
decl 12.2000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 29837 SUBJECT: GRB 210420A: Fermi GBM Final Real-time Localization DATE: 21/04/20 05:19:45 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 05:09:29 UT on 20 Apr 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210420A (trigger 640588174.204176 / 210420215). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 253.4, Dec = 12.2 (J2000 degrees, equivalent to J2000 16h 53m, 12d 11'), with a statistical uncertainty of 21.8 degrees. The angle from the Fermi LAT boresight is 80.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210420215/quicklook/glg_skymap_all_bn210420215.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/bn210420215/quicklook/glg_healpix_all_bn210420215.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210420215/quicklook/glg_lc_medres34_bn210420215.gif
GCN 29855 table
GRB_name GRB210420A
GCN_number 29855
Detection_method Fermi GBM Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 29855 SUBJECT: Fermi GRB 210420A: Global MASTER-Net observations report DATE: 21/04/21 03:00:27 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-IAC robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Spain (IAC Teide Observatory) started inspect of the Fermi GRB 210420A ( Fermi GBM team, GCN 29837) errorbox 76671 sec after notice time and 76698 sec after trigger time at 2021-04-21 02:27:47 UT, with upper limit up to 18.0 mag. The observations began at zenith distance = 19 deg. The sun altitude is -45.1 deg. The galactic latitude b = 31 deg., longitude l = 31 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1596846 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 76728 | 2021-04-21 02:27:47 | MASTER-IAC | (16h 48m 60.00s , +28d 09m 03.3s) | C | 60 | 18.0 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.