GRB 220905A
GCN Circular 32518
Subject
GRB 220905A: Fermi GBM Final Real-time Localization
Date
2022-09-05T11:39:12Z (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 11:28:43 UT on 5 Sep 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220905A (trigger 684070128.696976 / 220905478).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 343.5, Dec = -33.5 (J2000 degrees, equivalent to J2000 22h 53m, -33d 30'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 88.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220905478/quicklook/glg_skymap_all_bn220905478.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/bn220905478/quicklook/glg_healpix_all_bn220905478.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220905478/quicklook/glg_lc_medres34_bn220905478.gif
GCN Circular 32519
Subject
GRB 220905A: BALROG localization (Fermi Trigger 684070128 / GRB 220905478)
Date
2022-09-05T12:16:19Z (3 years ago)
From
Jochen Greiner at MPE,Garching <jcg@mpe.mpg.de>
B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
684070128 at 11:28:43 on 05 Sept. 2022 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).
The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 345.2+/-1.7 deg
Decl.(2000.0) = -35.4+/-1.5 deg
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB220905478/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB220905478/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB220905478/json
GCN Circular 32520
Subject
Fermi GRB 220905A: Global MASTER-Net observations report
Date
2022-09-05T18:45:27Z (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-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 220905A ( Fermi GBM team, GCN 32518) errorbox 20955 sec after notice time and 20989 sec after trigger time at 2022-09-05 17:18:33 UT, with upper limit up to 18.8 mag. Observations started at twilight. The observations began at zenith distance = 64 deg. The sun altitude is -12.3 deg.
The galactic latitude b = -65 deg., longitude l = 12 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2079144
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
21020 | 2022-09-05 17:18:33 | MASTER-SAAO | (22h 51m 26.96s , -33d 15m 04.5s) | C | 60 | 17.6 |
21113 | 2022-09-05 17:20:06 | MASTER-SAAO | (23h 00m 57.10s , -33d 13m 29.5s) | C | 60 | 17.6 |
21196 | 2022-09-05 17:21:29 | MASTER-SAAO | (22h 45m 20.59s , -35d 07m 28.2s) | C | 60 | 18.3 |
21287 | 2022-09-05 17:23:01 | MASTER-SAAO | (22h 55m 02.43s , -35d 08m 23.4s) | C | 60 | 18.4 |
21463 | 2022-09-05 17:25:56 | MASTER-SAAO | (22h 50m 13.38s , -31d 21m 29.9s) | C | 60 | 18.2 |
21870 | 2022-09-05 17:32:43 | MASTER-SAAO | (22h 42m 48.49s , -33d 13m 47.0s) | C | 60 | 18.4 |
22163 | 2022-09-05 17:37:36 | MASTER-SAAO | (22h 51m 19.35s , -33d 13m 37.9s) | C | 60 | 18.3 |
22245 | 2022-09-05 17:38:58 | MASTER-SAAO | (23h 00m 59.57s , -33d 14m 37.1s) | C | 60 | 18.5 |
22338 | 2022-09-05 17:40:31 | MASTER-SAAO | (22h 45m 14.95s , -35d 09m 35.5s) | C | 60 | 18.7 |
22420 | 2022-09-05 17:41:53 | MASTER-SAAO | (22h 55m 06.18s , -35d 09m 31.0s) | C | 60 | 18.8 |
22607 | 2022-09-05 17:45:00 | MASTER-SAAO | (22h 50m 14.90s , -31d 21m 29.0s) | C | 60 | 18.5 |
23017 | 2022-09-05 17:51:50 | MASTER-SAAO | (22h 42m 42.57s , -33d 13m 51.6s) | C | 60 | 18.6 |
23324 | 2022-09-05 17:56:57 | MASTER-SAAO | (22h 51m 17.95s , -33d 15m 51.9s) | C | 60 | 18.7 |
23600 | 2022-09-05 18:01:33 | MASTER-SAAO | (22h 55m 02.30s , -35d 09m 28.6s) | C | 60 | 18.8 |
23774 | 2022-09-05 18:04:27 | MASTER-SAAO | (22h 50m 09.71s , -31d 20m 56.2s) | C | 60 | 18.4 |
23950 | 2022-09-05 18:07:23 | MASTER-SAAO | (22h 42m 46.64s , -33d 14m 54.1s) | C | 60 | 18.8 |
24258 | 2022-09-05 18:12:31 | MASTER-SAAO | (22h 58m 38.98s , -31d 20m 17.1s) | C | 60 | 18.4 |
24610 | 2022-09-05 18:18:23 | MASTER-SAAO | (23h 03m 45.94s , -35d 09m 57.1s) | C | 60 | 18.7 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 32545
Subject
IPN triangulation of GRB 220905A
Date
2022-09-11T20:08:57Z (3 years ago)
From
Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>
A. Ridnaia, D. Frederiks, D. Svinkin, A. Lysenko,
and T. Cline on behalf of the Konus-Wind team,
A. Goldstein, M. S. Briggs, and C. Wilson-Hodge
on behalf of the Fermi GBM team,
E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
and
S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu
on behalf of the Swift-BAT team, report:
The long-duration GRB 220905A
(Fermi-GBM detection: Fermi GBM Team, GCN Circ. 32518,
BALROG localization: Biltzinger et al., GCN Circ. 32519)
was detected by Fermi (GBM trigger 684070128),
INTEGRAL (SPI-ACS), Konus-Wind, and Swift (BAT)
at about 41324 s UT (11:28:44).
The burst was outside the coded field of view of the BAT.
We have triangulated it to a preliminary, 3 sigma error box
whose coordinates are:
---------------------------------------------
RA(2000), deg Dec(2000), deg
---------------------------------------------
Center:
338.931 (22h 35m 43s) -37.594 (-37d 35' 38")
Corners:
341.100 (22h 44m 24s) -39.495 (-39d 29' 42")
341.797 (22h 47m 11s) +6.185 ( +6d 11' 06")
336.870 (22h 27m 29s) -35.655 (-35d 39' 18")
289.822 (19h 19m 17s) -23.843 (-23d 50' 36")
---------------------------------------------
The error box area is 349.6 sq. deg, and its maximum
dimension is 87.7 deg (the minimum one is 5 deg).
The Sun distance was 125 deg.
This box may be improved.
The IPN localization is consistent with, but reduces the area of, the
Fermi GBM Final Real-time position (GCN Circ. 31955) and BALROG
(GCN 31950) localizations.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220905_T41330/IPN
The Konus-Wind time history and spectrum will be given in a forthcoming
GCN Circular.