GRB 240804A
GCN Circular 37028
Subject
GRB 240804A: Fermi GBM Final Real-time Localization
Date
2024-08-04T19:16:43Z (10 months ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB
At 19:06:02 UT on 4 Aug 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240804A (trigger 744491167.353348 / 240804796).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 266.5, Dec = 59.8 (J2000 degrees, equivalent to J2000 17h 45m, 59d 47'), with a statistical uncertainty of 3.7 degrees.
The angle from the Fermi LAT boresight is 21.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240804796/quicklook/glg_skymap_all_bn240804796.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/bn240804796/quicklook/glg_healpix_all_bn240804796.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240804796/quicklook/glg_lc_medres34_bn240804796.gif
GCN Circular 37030
Subject
Fermi GRB 240804A: Global MASTER-Net observations report
Date
2024-08-04T21:45:40Z (10 months ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
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 240804A ( Fermi GBM team, GCN 37028) errorbox 6897 sec after notice time and 6928 sec after trigger time at 2024-08-04 21:01:30 UT, with upper limit up to 18.8 mag. The observations began at zenith distance = 28 deg. The sun altitude is -28.0 deg.
The galactic latitude b = 31 deg., longitude l = 88 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2550987
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
6958 | 2024-08-04 21:01:30 | MASTER-Tavrida | (17h 39m 17.27s , +59d 19m 52.2s) | C | 60 | 18.8 |
7031 | 2024-08-04 21:02:43 | MASTER-Tavrida | (17h 55m 03.48s , +59d 20m 47.9s) | C | 60 | 18.8 |
7105 | 2024-08-04 21:03:57 | MASTER-Tavrida | (17h 39m 16.68s , +60d 39m 25.4s) | C | 60 | 18.8 |
7179 | 2024-08-04 21:05:11 | MASTER-Tavrida | (17h 55m 45.65s , +60d 38m 06.5s) | C | 60 | 18.6 |
7252 | 2024-08-04 21:06:24 | MASTER-Tavrida | (17h 39m 49.96s , +58d 01m 30.8s) | C | 60 | 18.6 |
7326 | 2024-08-04 21:07:38 | MASTER-Tavrida | (17h 54m 55.38s , +58d 03m 00.5s) | C | 60 | 18.7 |
8707 | 2024-08-04 21:30:39 | MASTER-Tavrida | (17h 39m 17.26s , +59d 20m 03.8s) | C | 60 | 17.6 |
8781 | 2024-08-04 21:31:52 | MASTER-Tavrida | (17h 55m 06.57s , +59d 18m 47.5s) | C | 60 | 18.0 |
8854 | 2024-08-04 21:33:06 | MASTER-Tavrida | (17h 39m 18.91s , +60d 36m 09.1s) | C | 60 | 17.9 |
8927 | 2024-08-04 21:34:19 | MASTER-Tavrida | (17h 55m 47.90s , +60d 36m 21.2s) | C | 60 | 17.3 |
9001 | 2024-08-04 21:35:33 | MASTER-Tavrida | (17h 39m 48.79s , +58d 02m 10.2s) | C | 60 | 15.9 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.