GRB 220912A
GCN Circular 32546
Subject
GRB 220912A: Fermi GBM Final Real-time Localization
Date
2022-09-12T01:00:39Z (3 years ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
The Fermi GBM team reports the detection of a likely LONG GRB
At 00:50:21 UT on 12 Sep 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220912A (trigger 684636626.526236 / 220912035).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 165.3, Dec = 49.3 (J2000 degrees, equivalent to J2000 11h 01m, 49d 17'), with a statistical uncertainty of 3.6 degrees.
The angle from the Fermi LAT boresight is 81.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220912035/quicklook/glg_skymap_all_bn220912035.png
The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220912035/quicklook/glg_healpix_all_bn220912035.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220912035/quicklook/glg_lc_medres34_bn220912035.gif
GCN Circular 32549
Subject
GRB 220912A: AstroSat CZTI detection
Date
2022-09-12T18:06:24Z (3 years ago)
From
Gaurav Waratkar at IIT,Bombay <gauravwaratkar@iitb.ac.in>
R. Gopalakrishnan (IUCAA), V. Prasad (IUCAA), G. Waratkar (IITB), A.
Vibhute (IUCAA), V. Bhalerao (IITB), D. Bhattacharya (Ashoka
University/IUCAA), A. R. Rao (IUCAA/TIFR), and S. Vadawale (PRL) report
on behalf of the AstroSat CZTI collaboration:
Analysis of AstroSat CZTI data with the CIFT framework (Sharma et al.,
2021, JApA, 42, 73) showed a weak detection of a long GRB 220912A which
was also detected by Fermi GBM (GCN 32546).
The source was clearly detected in the 20-200 keV energy range. The
light curve peaks at 2022-09-12 00:50:39.3 UTC. The measured peak count
rate associated with the burst is 294 (+173, -15) counts/s above the
background in the combined data of all quadrants, with a total of 1224
(+364, -386) counts. The local mean background count rate was 444 (+3,
-4) counts/s. Using cumulative rates, we measure a T90 of 26 (+7, -7) s.
It was also detected in the CsI anticoincidence (Veto) detector in the
100-500 keV energy range. The light curve peaks at 2022-09-12 00:50:25.0
UTC. The measured peak count rate is 188 (+76, -25) counts/s above the
background in the combined Veto data of all quadrants, with a total of
1476 (+545, -575) counts. The local mean background count rate was 1458
(+3, -4) counts/s. We measure a T90 of 24 (+14, -12) s from the
cumulative Veto light curve.
CZTI GRB detections are reported regularly on the payload site at
http://astrosat.iucaa.in/czti/?q=grb. CZTI is built by a TIFR-led
consortium of institutes across India, including VSSC, URSC, IUCAA, SAC,
and PRL. The Indian Space Research Organisation funded, managed, and
facilitated the project.
GCN Circular 32552
Subject
Fermi GRB 220912A: Global MASTER-Net observations report
Date
2022-09-12T20:30:14Z (3 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, V.Kornilov, E.Gorbovskoy, K.Zhirkov, N.Tyurina, P.Balanutsa, A.Kuznetsov, D. Vlasenko,
G.Antipov, D.Zimnukhov, V.Senik, E.Minkina, A.Chasovnikov, V.Topolev, D.Kuvshinov, D.Cheryasov, Ya.Kechin
(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
(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),
A. Gabovich, V.Yurkov
(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 220912A ( Fermi GBM team, GCN 32546) errorbox 46550 sec after notice time and 46582 sec after trigger time at 2022-09-12 13:46:44 UT, with upper limit up to 14.6 mag. The observations began at zenith distance = 68 deg. The sun altitude is -20.8 deg.
MASTER-Amur robotic telescope located in Russia (Blagoveshchensk State Pedagogical University) started inspect of the Fermi GRB 220912A errorbox 61578 sec after notice time and 61609 sec after trigger time at 2022-09-12 17:57:11 UT, with upper limit up to 18.1 mag. The observations began at zenith distance = 71 deg. The sun altitude is -27.0 deg.
The galactic latitude b = 60 deg., longitude l = 159 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2085906
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
46613 | 2022-09-12 13:46:44 | MASTER-Tunka | (11h 30m 19.04s , +51d 47m 40.5s) | C | 60 | 12.9 | Coadd
46891 | 2022-09-12 13:51:22 | MASTER-Tunka | (10h 44m 51.56s , +53d 41m 35.0s) | C | 60 | 13.4 | Coadd
46963 | 2022-09-12 13:52:34 | MASTER-Tunka | (10h 57m 53.18s , +53d 41m 23.3s) | C | 60 | 14.1 | Coadd
47107 | 2022-09-12 13:54:58 | MASTER-Tunka | (10h 31m 13.89s , +51d 47m 13.7s) | C | 60 | 12.6 | Coadd
47176 | 2022-09-12 13:56:07 | MASTER-Tunka | (11h 27m 13.06s , +49d 53m 32.7s) | C | 60 | 13.2 | Coadd
48696 | 2022-09-12 14:21:27 | MASTER-Tunka | (11h 09m 52.80s , +53d 40m 36.9s) | C | 60 | 14.6 | Coadd
49713 | 2022-09-12 14:38:24 | MASTER-Tunka | (11h 10m 04.22s , +53d 41m 10.4s) | C | 60 | 13.5 | Coadd
61640 | 2022-09-12 17:57:11 | MASTER-Amur | (10h 32m 13.61s , +50d 34m 51.9s) | C | 60 | 17.5 |
61799 | 2022-09-12 17:59:50 | MASTER-Amur | (10h 34m 00.94s , +52d 29m 12.7s) | C | 60 | 17.4 |
62606 | 2022-09-12 18:13:17 | MASTER-Amur | (10h 32m 12.78s , +50d 35m 30.8s) | C | 60 | 17.7 |
62766 | 2022-09-12 18:15:57 | MASTER-Amur | (10h 34m 03.10s , +52d 29m 29.0s) | C | 60 | 17.5 |
63573 | 2022-09-12 18:29:24 | MASTER-Amur | (10h 32m 19.72s , +50d 34m 21.7s) | C | 60 | 17.7 |
63732 | 2022-09-12 18:32:03 | MASTER-Amur | (10h 34m 01.14s , +52d 28m 09.2s) | C | 60 | 17.5 |
64017 | 2022-09-12 18:36:48 | MASTER-Amur | (10h 42m 09.66s , +48d 42m 07.2s) | C | 60 | 17.7 |
64097 | 2022-09-12 18:38:08 | MASTER-Amur | (10h 54m 24.03s , +48d 41m 15.9s) | C | 60 | 17.9 |
64256 | 2022-09-12 18:40:47 | MASTER-Amur | (10h 31m 18.69s , +48d 41m 24.4s) | C | 60 | 17.6 |
64814 | 2022-09-12 18:50:05 | MASTER-Amur | (10h 41m 33.50s , +46d 46m 46.3s) | C | 60 | 17.7 |
65101 | 2022-09-12 18:54:52 | MASTER-Amur | (10h 53m 20.72s , +46d 46m 39.3s) | C | 60 | 17.7 |
65181 | 2022-09-12 18:56:12 | MASTER-Amur | (10h 42m 12.38s , +48d 39m 29.2s) | C | 60 | 17.8 |
65262 | 2022-09-12 18:57:33 | MASTER-Amur | (10h 54m 24.51s , +48d 39m 58.8s) | C | 60 | 18.0 |
65422 | 2022-09-12 19:00:13 | MASTER-Amur | (10h 31m 19.64s , +48d 39m 27.7s) | C | 60 | 17.8 |
65987 | 2022-09-12 19:09:38 | MASTER-Amur | (10h 41m 38.49s , +46d 46m 49.5s) | C | 60 | 18.1 |
66271 | 2022-09-12 19:14:22 | MASTER-Amur | (10h 53m 21.02s , +46d 47m 01.2s) | C | 60 | 17.8 |
66352 | 2022-09-12 19:15:43 | MASTER-Amur | (10h 42m 11.01s , +48d 40m 03.2s) | C | 60 | 17.8 |
66431 | 2022-09-12 19:17:02 | MASTER-Amur | (10h 54m 17.82s , +48d 41m 12.0s) | C | 60 | 18.1 |
66591 | 2022-09-12 19:19:42 | MASTER-Amur | (10h 31m 18.77s , +48d 38m 46.0s) | C | 60 | 17.7 |
67162 | 2022-09-12 19:29:13 | MASTER-Amur | (10h 41m 42.28s , +46d 45m 42.4s) | C | 60 | 17.9 |
67242 | 2022-09-12 19:30:33 | MASTER-Amur | (10h 53m 17.00s , +46d 44m 52.0s) | C | 60 | 17.8 |
67321 | 2022-09-12 19:31:52 | MASTER-Amur | (11h 03m 12.57s , +44d 52m 42.4s) | C | 60 | 17.7 |
67401 | 2022-09-12 19:33:12 | MASTER-Amur | (11h 14m 29.50s , +44d 51m 35.6s) | C | 60 | 17.7 |
67481 | 2022-09-12 19:34:32 | MASTER-Amur | (11h 26m 00.47s , +46d 46m 14.3s) | C | 60 | 17.3 |
67641 | 2022-09-12 19:37:12 | MASTER-Amur | (10h 41m 43.54s , +44d 50m 31.7s) | C | 60 | 18.0 |
67720 | 2022-09-12 19:38:31 | MASTER-Amur | (10h 53m 07.37s , +44d 50m 43.7s) | C | 60 | 17.8 |
68278 | 2022-09-12 19:47:49 | MASTER-Amur | (11h 03m 13.50s , +44d 50m 59.7s) | C | 60 | 17.3 |
68357 | 2022-09-12 19:49:09 | MASTER-Amur | (11h 14m 32.84s , +44d 52m 42.4s) | C | 60 | 17.2 |
68437 | 2022-09-12 19:50:28 | MASTER-Amur | (11h 26m 00.73s , +46d 45m 52.5s) | C | 60 | 16.9 |
68596 | 2022-09-12 19:53:07 | MASTER-Amur | (10h 41m 48.74s , +44d 51m 09.5s) | C | 60 | 17.2 |
68676 | 2022-09-12 19:54:27 | MASTER-Amur | (10h 53m 01.76s , +44d 50m 18.7s) | C | 60 | 17.1 |
69239 | 2022-09-12 20:03:50 | MASTER-Amur | (11h 03m 16.84s , +44d 51m 14.5s) | C | 60 | 16.0 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 32624
Subject
GRB 220912A: Detection by VZLUSAT-2
Date
2022-10-05T07:21:28Z (3 years ago)
From
Jakub Ripa at Masaryk University <245487@mail.muni.cz>
J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory),�� N. Werner (Masaryk
U.), M. Ohno (Hiroshima U.),�� L. Meszaros, B. Csak (Konkoly
Observatory), H. Takahashi (Hiroshima U.), F. Munz , M. Topinka, F.
Hroch, M. Dafcikova, N. Husarikova, J.-P. Breuer (Masaryk U.), J. Hudec,
J. Kapus, M. Frajt, M. Rezenov (Spacemanic s.r.o), R. Laszlo
(Needronix), G. Galgoczi (Wigner Research Center/Eotvos U.), N. Uchida
(ISAS/JAXA), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), Y. Fukazawa, K.
Hirose, H. Matake (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe
(Rikkyo U.), L. L. Kiss (Konkoly Observatory),�� T. Mizuno (Hiroshima
U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), K. Torigoe
(Hiroshima U.), P. Svoboda, V. Daniel, J. Dudas, M. Junas, J. Gromes
(VZLU), I. Vertat (FEL ZCU)�� -- the VZLUSAT-2/GRB payload collaboration.
A long-duration GRB 220912A (Fermi-GBM detection: Fermi GBM Team, GCN
32546; AstroSat CZTI detection: Gopalakrishnan et al. GCN 32549) was
detected by a GRB detector on board of the VZLUSAT-2 3U CubeSat
(https://www.vzlusat2.cz/en/).
The data acquisition was performed by the GRB detector unit no. 1. The
9.1 sigma detection was confirmed at 2022-09-12 00:50:23 UTC. The GRB
has the T90 duration of 36 s.
The light curve obtained by VZLUSAT-2 is available here:
https://vzlusat2.konkoly.hu/static/share/GRB220912A_GCN_VZLUSAT2.pdf
GRB detectors on VZLUSAT-2 are a demonstration payload for a future
CubeSats constellation (Werner et al. Proc. SPIE 2018). Two GRB modules
of VZLUSAT-2 are placed in a perpendicular manner and each consists of a
75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the
energy range from ~30 keV to ~1000 keV. VZLUSAT-2 was launched on 2022
January 13 from Cape Canaveral.