GRB 240320A
GCN Circular 35967
Subject
GRB 240320A: Fermi GBM Final Real-time Localization
Date
2024-03-20T17:40:23Z (a year 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 17:29:47 UT on 20 Mar 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240320A (trigger 732648592.559252 / 240320729).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 150.8, Dec = 63.4 (J2000 degrees, equivalent to J2000 10h 03m, 63d 23'), with a statistical uncertainty of 14.5 degrees.
The angle from the Fermi LAT boresight is 55.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240320729/quicklook/glg_skymap_all_bn240320729.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/bn240320729/quicklook/glg_healpix_all_bn240320729.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240320729/quicklook/glg_lc_medres34_bn240320729.gif
GCN Circular 35973
Subject
Fermi GRB 240320A: Global MASTER-Net observations report
Date
2024-03-21T17:46:02Z (a year 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-Tunka robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Russia (Applied Physics Institute, Irkutsk State University) started inspect of the Fermi GRB 240320A ( Fermi GBM team, GCN 35967) errorbox 69145 sec after notice time and 69181 sec after trigger time at 2024-03-21 12:42:48 UT, with upper limit up to 18.2 mag. Observations started at twilight. The observations began at zenith distance = 15 deg. The sun altitude is -13.5 deg.
MASTER-Amur robotic telescope located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 240320A errorbox 80725 sec after notice time and 80760 sec after trigger time at 2024-03-21 15:55:48 UT, with upper limit up to 17.3 mag. The observations began at zenith distance = 30 deg. The sun altitude is -39.4 deg.
The galactic latitude b = 45 deg., longitude l = 148 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2403375
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
69211 | 2024-03-21 12:42:48 | MASTER-Tunka | (09h 10m 24.61s , +52d 39m 34.5s) | C | 60 | 14.4 |
69335 | 2024-03-21 12:44:52 | MASTER-Tunka | (09h 11m 55.93s , +50d 44m 36.9s) | C | 60 | 14.3 | Coadd
69600 | 2024-03-21 12:49:17 | MASTER-Tunka | (08h 45m 24.19s , +52d 40m 17.4s) | C | 60 | 15.9 | Coadd
69698 | 2024-03-21 12:50:55 | MASTER-Tunka | (09h 09m 31.06s , +54d 32m 15.0s) | C | 60 | 16.5 | Coadd
69797 | 2024-03-21 12:52:34 | MASTER-Tunka | (08h 45m 26.41s , +52d 40m 09.6s) | C | 60 | 16.9 | Coadd
70044 | 2024-03-21 12:56:41 | MASTER-Tunka | (09h 35m 38.76s , +54d 33m 26.0s) | C | 60 | 16.1 | Coadd
70162 | 2024-03-21 12:58:40 | MASTER-Tunka | (08h 43m 21.21s , +54d 33m 41.9s) | C | 60 | 15.6 | Coadd
70282 | 2024-03-21 13:00:39 | MASTER-Tunka | (09h 35m 39.14s , +54d 31m 37.8s) | C | 60 | 14.8 | Coadd
71463 | 2024-03-21 13:20:20 | MASTER-Tunka | (09h 13m 48.63s , +48d 52m 15.6s) | C | 60 | 13.9 | Coadd
71922 | 2024-03-21 13:28:19 | MASTER-Tunka | (08h 35m 26.53s , +60d 30m 49.8s) | C | 20 | 18.2 |
72059 | 2024-03-21 13:30:16 | MASTER-Tunka | (08h 49m 27.90s , +60d 06m 51.9s) | C | 60 | 12.8 | Coadd
72144 | 2024-03-21 13:31:41 | MASTER-Tunka | (09h 12m 34.32s , +60d 05m 50.6s) | C | 60 | 17.6 | Coadd
72230 | 2024-03-21 13:33:07 | MASTER-Tunka | (08h 44m 16.89s , +59d 00m 23.4s) | C | 60 | 14.7 | Coadd
72313 | 2024-03-21 13:34:30 | MASTER-Tunka | (08h 49m 20.66s , +58d 52m 02.7s) | C | 60 | 12.9 | Coadd
80766 | 2024-03-21 15:55:48 | MASTER-Amur | (09h 02m 06.67s , +67d 36m 52.7s) | C | 10 | 15.8 |
80766 | 2024-03-21 15:55:48 | MASTER-Amur | (09h 01m 59.37s , +67d 58m 27.7s) | C | 10 | 16.1 |
80805 | 2024-03-21 15:56:27 | MASTER-Amur | (09h 02m 06.57s , +67d 35m 07.2s) | C | 10 | 15.8 |
80805 | 2024-03-21 15:56:27 | MASTER-Amur | (09h 01m 59.52s , +67d 56m 43.7s) | C | 10 | 16.0 |
80834 | 2024-03-21 15:56:56 | MASTER-Amur | (08h 41m 37.71s , +67d 35m 50.6s) | C | 10 | 15.8 |
80834 | 2024-03-21 15:56:56 | MASTER-Amur | (08h 41m 31.44s , +67d 57m 26.9s) | C | 10 | 16.0 |
80864 | 2024-03-21 15:57:26 | MASTER-Amur | (08h 41m 32.86s , +67d 34m 59.8s) | C | 10 | 15.7 |
80864 | 2024-03-21 15:57:26 | MASTER-Amur | (08h 41m 26.59s , +67d 56m 42.7s) | C | 10 | 15.9 |
80893 | 2024-03-21 15:57:55 | MASTER-Amur | (08h 41m 33.39s , +67d 35m 44.6s) | C | 10 | 15.8 |
80893 | 2024-03-21 15:57:55 | MASTER-Amur | (08h 41m 27.16s , +67d 57m 27.9s) | C | 10 | 15.9 |
80923 | 2024-03-21 15:58:25 | MASTER-Amur | (08h 41m 39.41s , +67d 34m 30.6s) | C | 10 | 15.8 |
80923 | 2024-03-21 15:58:25 | MASTER-Amur | (08h 41m 33.20s , +67d 56m 14.3s) | C | 10 | 16.1 |
80963 | 2024-03-21 15:58:55 | MASTER-Amur | (08h 41m 33.61s , +67d 33m 14.3s) | C | 30 | 16.3 |
80963 | 2024-03-21 15:58:55 | MASTER-Amur | (08h 41m 27.54s , +67d 54m 59.0s) | C | 30 | 16.6 |
81013 | 2024-03-21 15:59:45 | MASTER-Amur | (08h 41m 40.23s , +67d 35m 41.2s) | C | 30 | 15.4 |
81013 | 2024-03-21 15:59:45 | MASTER-Amur | (08h 41m 34.15s , +67d 57m 26.4s) | C | 30 | 15.7 |
81062 | 2024-03-21 16:00:34 | MASTER-Amur | (08h 41m 37.02s , +67d 36m 44.4s) | C | 30 | 15.8 |
81062 | 2024-03-21 16:00:34 | MASTER-Amur | (08h 41m 30.97s , +67d 58m 30.1s) | C | 30 | 16.3 |
81127 | 2024-03-21 16:01:24 | MASTER-Amur | (08h 41m 37.50s , +67d 34m 57.2s) | C | 60 | 15.5 |
81127 | 2024-03-21 16:01:24 | MASTER-Amur | (08h 41m 31.42s , +67d 56m 43.6s) | C | 60 | 16.0 |
81207 | 2024-03-21 16:02:44 | MASTER-Amur | (08h 41m 42.72s , +67d 35m 45.5s) | C | 60 | 15.5 |
81207 | 2024-03-21 16:02:44 | MASTER-Amur | (08h 41m 36.68s , +67d 57m 33.0s) | C | 60 | 16.0 |
81287 | 2024-03-21 16:04:05 | MASTER-Amur | (08h 41m 37.54s , +67d 34m 19.1s) | C | 60 | 15.5 |
81287 | 2024-03-21 16:04:05 | MASTER-Amur | (08h 41m 32.01s , +67d 56m 06.4s) | C | 60 | 15.8 |
82177 | 2024-03-21 16:18:54 | MASTER-Amur | (08h 41m 37.32s , +67d 59m 35.7s) | C | 60 | 17.3 |
82177 | 2024-03-21 16:18:54 | MASTER-Amur | (08h 41m 47.95s , +67d 37m 53.7s) | C | 60 | 16.6 |
82257 | 2024-03-21 16:20:14 | MASTER-Amur | (08h 41m 43.13s , +67d 58m 37.2s) | C | 60 | 17.2 |
82257 | 2024-03-21 16:20:14 | MASTER-Amur | (08h 41m 53.19s , +67d 36m 50.6s) | C | 60 | 16.6 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 35976
Subject
GRB 240320A: Glowbug gamma-ray detection
Date
2024-03-25T15:16:54Z (a year ago)
From
C.C. Cheung at Naval Research Lab <Teddy.Cheung@nrl.navy.mil>
Via
Web form
C.C. Cheung, R. Woolf, M. Kerr, J.E. Grove (NRL), A. Goldstein (USRA), C.A. Wilson-Hodge, D. Kocevski (MSFC), and M.S. Briggs (UAH) report:
The Glowbug gamma-ray telescope [1,2], operating on the International Space Station, reports the detection of GRB 240320A, which was also detected by Fermi GBM (GCN 35967).
Using an adaptive window with a resolution of 32-ms, the burst onset is determined to be 2024-03-20 17:29:44.176 with a duration of 5.1 s and a total significance of about 14.9 sigma. The light curve comprises two primary peaks at ~T0+1s and ~T0+3.5s.
Using a standard power-law function with an exponential high-energy cutoff [3] to model the emission over this duration results in a poorly constrained power-law index and a cutoff energy ("Epeak") of 191 keV. The modeled 10-10000 keV fluence is 4.5e-07 erg/cm^2.
The analysis results presented here are preliminary and use a response function that lacks a detailed characterization of the surrounding passive structure of the ISS.
Glowbug is a NASA-funded technology demonstrator for sensitive, low-cost gamma-ray transient telescopes developed, built, and operated by the U.S. Naval Research Laboratory (NRL) with support from the University of Alabama in Huntsville, USRA, and NASA MSFC. It was launched on 2023 March 15 aboard the Department of Defense Space Test Program’s STP-H9 to the ISS. The detector comprises 12 large-area (15 cm x 15 cm) CsI:Tl panels covering the surface of a half cube, and two hexagonal (5-cm diameter, 10-cm length) CLLB scintillators, giving it a large field of view (instantaneous FoV ~2/3 sky) over a wide energy band of 50 keV to >2 MeV.
[1] Grove, J.E. et al. 2020, Proc. Yamada Conf. LXXI, arXiv:2009.11959
[2] Woolf, R.S. et al. 2022, Proc. SPIE, 12181, id. 121811O
[3] Goldstein, A. et al. 2020, ApJ 895, 40, arXiv :1909.03006
Distribution Statement A: Approved for public release. Distribution is unlimited.