GRB 220411A
GCN Circular 31920
Subject
IPN triangulation of GRB 220411A
Date
2022-04-19T10:07:29Z (3 years ago)
From
Anna Ridnaia at Ioffe Institute <ridnaia@mail.ioffe.ru>
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin
on behalf of the HEND/Mars-Odyssey team,
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
W. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr,
and A.S. Gardner on on behalf of the GRS-Odyssey GRB team,
report:
The long-duration GRB 220411A
(Fermi-GBM detection: The Fermi GBM team, GCN Circ. 31871;
BALROG localization: Kunzweiler et al., GCN Circ. 31872;
AstroSat CZTI detection: Gopalakrishnan et al., GCN Circ. 31879)
was detected by Fermi (GBM trigger 671354405), INTEGRAL (SPI-ACS),
Konus-Wind, Mars-Odyssey (HEND), and AstroSat (CZTI)
at about 26401 s UT (07:20:01).
We have triangulated it to a SPI-ACS-HEND annulus centered at
RA(2000)=149.487 deg (09h 57m 57s) Dec(2000)=+13.850 deg (+13d 50' 59"),
whose radius is 30.455 +/- 0.229 deg (3 sigma).
The Fermi GBM Final Real-time (GCN Circ. 31871) and
BALROG (GCN Circ. 31872) localizations are consistent with the annulus.
The annulus combined with the BALROG localization
gives the following error box:
------------------------------------------------------------
RA(2000), deg Dec(2000), deg
------------------------------------------------------------
Center:
179.643 (11h 58m 34s) +25.001 (+25d 00' 04")
Corners:
176.853 (11h 47m 25s) +31.565 (+31d 33' 54")
176.353 (11h 45m 25s) +31.390 (+31d 23' 26")
180.657 (12h 02m 38s) +18.050 (+18d 03' 01")
181.134 (12h 04m 32s) +18.133 (+18d 07' 57")
------------------------------------------------------------
The error box area is 6.4 sq. deg, and its maximum
dimension is 14 deg (the minimum one is 27 arcmin).
The Sun distance was 134 deg.
This box may be improved.
A triangulation map and HEALPix FITS file are posted at
http://www.ioffe.ru/LEA/GRBs/GRB220411_T26405/IPN
The time history and spectrum will be given in forthcoming GCN Circulars.
GCN Circular 31879
Subject
GRB 220411A: AstroSat CZTI detection
Date
2022-04-12T04:22:16Z (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 (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 detection of a long GRB 220411A which was
also detected by Fermi - GBM (Trigger No. 220411306, GCN 31871) with
BALROG localisation reported (Kunzweiler et al., GCN 31872).
The source was clearly detected in the 20-200 keV energy range in three
quadrants (out of four). Two quadrants were noisy and we exclude them in
further analysis. The light curve peaked at 2022-04-11 07:20:02.25 UT.
The measured peak count rate associated with the burst is 337 (+151,
-22) counts/s above the background in the combined data of two
quadrants, with a total of 1155 (+298, -200) counts. The local mean
background count rate was 254 (+4, -5) counts/s. Using cumulative rates,
we measure a T90 of 19 (+1, -2) s.
It was also clearly detected in the CsI anticoincidence (Veto) detector
in the 100-500 keV energy range. The light curve showed a single peak of
emission at 2022-04-11 07:20:01.00 UT. The measured peak count rate is
499 (+73, -77) counts/s above the background in the combined Veto data
of four quadrants, with a total of 2897 (+734, -604) counts. The local
mean background count rate was 1722 (+3, -5) counts/s. We measure a T90
of 26 (+13, -10) 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 [1]. CZTI is built by a TIFR-led
consortium of institutes across India, including VSSC, ISAC, IUCAA, SAC,
and PRL. The Indian Space Research Organisation funded, managed, and
facilitated the project.
Links:
------
[1] http://astrosat.iucaa.in/czti/?q=grb
GCN Circular 31873
Subject
Fermi GRB 220411A: Global MASTER-Net observations report
Date
2022-04-11T08:30:29Z (4 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-OAGH robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Mexico (OAGH National Institute for Astrophysics, Optics and Electronics) started inspect of the Fermi GRB 220411A ( Fermi GBM team, GCN 31871) errorbox 32 sec after notice time and 62 sec after trigger time at 2022-04-11 07:21:03 UT, with upper limit up to 17.5 mag. The observations began at zenith distance = 20 deg. The sun altitude is -50.8 deg.
The galactic latitude b = 77 deg., longitude l = 218 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=1939159
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
68 | 2022-04-11 07:21:03 | MASTER-OAGH | (11h 52m 52.63s , +26d 05m 41.6s) | P- | 10 | 14.4 |
104 | 2022-04-11 07:21:34 | MASTER-OAGH | (11h 52m 48.93s , +26d 07m 11.8s) | P- | 20 | 15.9 |
150 | 2022-04-11 07:22:15 | MASTER-OAGH | (11h 53m 18.01s , +25d 38m 16.8s) | C | 30 | 12.1 |
150 | 2022-04-11 07:22:15 | MASTER-OAGH | (11h 52m 48.76s , +26d 05m 30.2s) | P- | 30 | 16.8 |
210 | 2022-04-11 07:23:10 | MASTER-OAGH | (11h 52m 52.09s , +26d 07m 01.4s) | P- | 40 | 16.3 |
298 | 2022-04-11 07:24:33 | MASTER-OAGH | (11h 52m 45.16s , +26d 06m 06.2s) | P- | 50 | 16.3 |
298 | 2022-04-11 07:24:33 | MASTER-OAGH | (11h 53m 14.19s , +25d 38m 45.3s) | C | 50 | 12.5 |
390 | 2022-04-11 07:25:55 | MASTER-OAGH | (11h 53m 14.35s , +25d 39m 45.2s) | C | 70 | 12.5 |
390 | 2022-04-11 07:25:55 | MASTER-OAGH | (11h 52m 45.14s , +26d 07m 03.3s) | P- | 70 | 16.6 |
491 | 2022-04-11 07:27:26 | MASTER-OAGH | (11h 52m 51.45s , +26d 06m 02.5s) | P- | 90 | 15.3 |
613 | 2022-04-11 07:29:18 | MASTER-OAGH | (11h 53m 08.87s , +25d 38m 00.0s) | C | 110 | 12.4 |
613 | 2022-04-11 07:29:18 | MASTER-OAGH | (11h 52m 45.44s , +26d 05m 00.2s) | P- | 110 | 16.6 |
761 | 2022-04-11 07:31:31 | MASTER-OAGH | (11h 53m 16.06s , +25d 37m 53.4s) | C | 140 | 12.8 |
761 | 2022-04-11 07:31:31 | MASTER-OAGH | (11h 52m 52.62s , +26d 05m 00.5s) | P- | 140 | 16.8 |
944 | 2022-04-11 07:34:19 | MASTER-OAGH | (11h 52m 49.29s , +26d 06m 36.6s) | P- | 170 | 17.3 |
944 | 2022-04-11 07:34:19 | MASTER-OAGH | (11h 53m 18.70s , +25d 39m 19.9s) | C | 170 | 12.3 |
1141 | 2022-04-11 07:37:31 | MASTER-OAGH | (11h 53m 18.99s , +25d 37m 48.3s) | C | 180 | 12.5 |
1141 | 2022-04-11 07:37:31 | MASTER-OAGH | (11h 52m 49.51s , +26d 05m 09.8s) | P- | 180 | 17.0 |
1376 | 2022-04-11 07:41:26 | MASTER-OAGH | (11h 53m 22.33s , +25d 39m 17.1s) | C | 180 | 12.9 |
1376 | 2022-04-11 07:41:26 | MASTER-OAGH | (11h 52m 52.96s , +26d 06m 39.9s) | P- | 180 | 17.1 |
1616 | 2022-04-11 07:45:26 | MASTER-OAGH | (11h 52m 47.04s , +26d 06m 00.2s) | P- | 180 | 17.2 |
1758 | 2022-04-11 07:48:48 | MASTER-OAGH | (11h 44m 46.14s , +26d 20m 59.3s) | C | 60 | 17.1 |
2083 | 2022-04-11 07:54:13 | MASTER-OAGH | (11h 54m 00.64s , +25d 53m 10.6s) | C | 60 | 12.4 |
2083 | 2022-04-11 07:54:13 | MASTER-OAGH | (11h 53m 35.38s , +26d 20m 18.2s) | C | 60 | 17.1 |
2165 | 2022-04-11 07:55:35 | MASTER-OAGH | (11h 50m 30.92s , +24d 27m 07.4s) | C | 60 | 16.0 |
2246 | 2022-04-11 07:56:56 | MASTER-OAGH | (11h 59m 16.98s , +24d 28m 08.3s) | C | 60 | 16.3 |
2429 | 2022-04-11 07:59:59 | MASTER-OAGH | (11h 48m 33.06s , +28d 14m 02.1s) | C | 60 | 17.0 |
2515 | 2022-04-11 08:01:25 | MASTER-OAGH | (11h 56m 38.11s , +28d 13m 55.7s) | C | 60 | 17.1 |
2767 | 2022-04-11 08:05:37 | MASTER-OAGH | (11h 44m 39.76s , +26d 21m 01.6s) | C | 60 | 16.4 |
2848 | 2022-04-11 08:06:58 | MASTER-OAGH | (12h 01m 40.16s , +26d 21m 01.6s) | C | 60 | 17.1 |
3011 | 2022-04-11 08:09:41 | MASTER-OAGH | (11h 53m 39.58s , +26d 20m 06.2s) | C | 60 | 16.8 |
3097 | 2022-04-11 08:11:07 | MASTER-OAGH | (11h 50m 34.31s , +24d 27m 48.4s) | C | 60 | 16.6 |
3178 | 2022-04-11 08:12:28 | MASTER-OAGH | (11h 59m 19.92s , +24d 26m 29.8s) | C | 60 | 17.5 |
3272 | 2022-04-11 08:14:02 | MASTER-OAGH | (11h 39m 57.05s , +27d 48m 51.2s) | C | 60 | 12.7 |
3376 | 2022-04-11 08:15:46 | MASTER-OAGH | (11h 48m 58.26s , +27d 47m 33.3s) | C | 60 | 12.5 |
3376 | 2022-04-11 08:15:46 | MASTER-OAGH | (11h 48m 25.73s , +28d 14m 53.5s) | C | 60 | 17.0 |
3476 | 2022-04-11 08:17:26 | MASTER-OAGH | (11h 56m 34.57s , +28d 15m 55.0s) | C | 60 | 16.5 |
3666 | 2022-04-11 08:20:36 | MASTER-OAGH | (11h 44m 41.17s , +26d 20m 00.7s) | C | 60 | 16.5 |
3980 | 2022-04-11 08:25:50 | MASTER-OAGH | (11h 49m 16.26s , +22d 32m 35.4s) | C | 60 | 16.6 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 31872
Subject
GRB 220411A: BALROG localization (Fermi Trigger 671354405/ GRB 220411306)
Date
2022-04-11T08:12:32Z (4 years ago)
From
Jochen Greiner at MPE,Garching <jcg@mpe.mpg.de>
F. Kunzweiler, B. Biltzinger, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
671354405 at 07:20:00 on 11 April 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) = 176.5+/-1.5 deg
Decl.(2000.0) = 24.0+/-2.6 deg
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB220411306/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB220411306/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB220411306/json
GCN Circular 31871
Subject
GRB 220411A: Fermi GBM Final Real-time Localization
Date
2022-04-11T07:29:20Z (4 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 07:20:00 UT on 11 Apr 2022, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 220411A (trigger 671354405.530438 / 220411306).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 178.2, Dec = 25.6 (J2000 degrees, equivalent to J2000 11h 52m, 25d 36'), with a statistical uncertainty of 1.7 degrees.
The angle from the Fermi LAT boresight is 6.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220411306/quicklook/glg_skymap_all_bn220411306.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/bn220411306/quicklook/glg_healpix_all_bn220411306.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220411306/quicklook/glg_lc_medres34_bn220411306.gif