Gamma-ray Burst 220905A

(All information courtesy of the instrument teams.)

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Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 05 Sep 22 11:29:13 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      48
TRIGGER_NUM:     684070128
GRB_RA:          332.833d {+22h 11m 20s} (J2000),
                 333.146d {+22h 12m 35s} (current),
                 332.143d {+22h 08m 34s} (1950)
GRB_DEC:         -21.000d {-21d 00' 00"} (J2000),
                 -20.888d {-20d 53' 14"} (current),
                 -21.247d {-21d 14' 48"} (1950)
GRB_ERROR:       13.13 [deg radius, statistical plus systematic]
GRB_INTEN:       186 [cnts/sec]
DATA_SIGNIF:     11.30 [sigma]
INTEG_TIME:      2.048 [sec]
GRB_DATE:        19827 TJD;   248 DOY;   22/09/05
GRB_TIME:        41323.70 SOD {11:28:43.70} UT
GRB_PHI:         167.00 [deg]
GRB_THETA:        75.00 [deg]
DATA_TIME_SCALE: 2.0480 [sec]
HARD_RATIO:      0.65
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      96%  GRB
2nd_MOST_LIKELY:   3%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 1,1,1, 0,0,
SUN_POSTN:       164.23d {+10h 56m 55s}   +6.72d {+06d 43' 05"}
SUN_DIST:        162.23 [deg]   Sun_angle= -11.3 [hr] (East of Sun)
MOON_POSTN:      276.43d {+18h 25m 43s}  -27.31d {-27d 18' 20"}
MOON_DIST:        51.75 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       33.60,-53.10 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      327.28, -9.16 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220905478/quicklook/glg_lc_medres34_bn220905478.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 207.17,10.37 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 05 Sep 22 11:29:22 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      59
TRIGGER_NUM:     684070128
GRB_RA:          341.467d {+22h 45m 52s} (J2000),
                 341.776d {+22h 47m 06s} (current),
                 340.783d {+22h 43m 08s} (1950)
GRB_DEC:         -25.533d {-25d 31' 59"} (J2000),
                 -25.413d {-25d 24' 48"} (current),
                 -25.797d {-25d 47' 47"} (1950)
GRB_ERROR:       6.40 [deg radius, statistical plus systematic]
GRB_INTEN:       441 [cnts/sec]
DATA_SIGNIF:     39.30 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        19827 TJD;   248 DOY;   22/09/05
GRB_TIME:        41323.70 SOD {11:28:43.70} UT
GRB_PHI:         175.00 [deg]
GRB_THETA:        80.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.75
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
DETECTORS:       0,0,0, 0,0,0, 0,0,0, 1,1,1, 0,0,
SUN_POSTN:       164.23d {+10h 56m 55s}   +6.72d {+06d 43' 05"}
SUN_DIST:        161.16 [deg]   Sun_angle= -11.8 [hr] (East of Sun)
MOON_POSTN:      276.43d {+18h 25m 44s}  -27.31d {-27d 18' 20"}
MOON_DIST:        57.88 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       28.99,-61.89 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      333.07,-16.34 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220905478/quicklook/glg_lc_medres34_bn220905478.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 207.17,10.37 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 05 Sep 22 11:29:31 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      58
TRIGGER_NUM:     684070128
GRB_RA:          342.040d {+22h 48m 10s} (J2000),
                 342.353d {+22h 49m 25s} (current),
                 341.347d {+22h 45m 23s} (1950)
GRB_DEC:         -30.610d {-30d 36' 35"} (J2000),
                 -30.490d {-30d 29' 22"} (current),
                 -30.874d {-30d 52' 27"} (1950)
GRB_ERROR:       2.51 [deg radius, statistical only]
DATA_SIGNIF:     31.40 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        19827 TJD;   248 DOY;   22/09/05
GRB_TIME:        41323.70 SOD {11:28:43.70} UT
GRB_PHI:         175.00 [deg]
GRB_THETA:        85.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:       164.23d {+10h 56m 55s}   +6.72d {+06d 43' 05"}
SUN_DIST:        156.16 [deg]   Sun_angle= -11.9 [hr] (East of Sun)
MOON_POSTN:      276.43d {+18h 25m 44s}  -27.31d {-27d 18' 20"}
MOON_DIST:        56.96 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       18.17,-62.87 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      331.42,-21.20 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220905478/quicklook/glg_lc_medres34_bn220905478.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_684070128.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file will not be created/available until ~15 min after the trigger.  
COMMENTS:        The POS_MAP_URL file will not be created/available until ~1.5 min after the notice.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Mon 05 Sep 22 11:38:13 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     684070128
GRB_RA:          343.510d {+22h 54m 02s} (J2000),
                 343.824d {+22h 55m 18s} (current),
                 342.816d {+22h 51m 16s} (1950)
GRB_DEC:         -33.460d {-33d 27' 35"} (J2000),
                 -33.339d {-33d 20' 19"} (current),
                 -33.726d {-33d 43' 34"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
GRB_DATE:        19827 TJD;   248 DOY;   22/09/05
GRB_TIME:        41323.70 SOD {11:28:43.70} UT
GRB_PHI:         176.00 [deg]
GRB_THETA:        88.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:       164.24d {+10h 56m 57s}   +6.72d {+06d 42' 56"}
SUN_DIST:        153.37 [deg]   Sun_angle= -12.0 [hr] (East of Sun)
MOON_POSTN:      276.53d {+18h 26m 08s}  -27.31d {-27d 18' 23"}
MOON_DIST:        57.41 [deg]
MOON_ILLUM:      70 [%]
GAL_COORDS:       11.67,-63.97 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      331.38,-24.31 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220905478/quicklook/glg_lc_medres34_bn220905478.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2022/bn220905478/quicklook/glg_locplot_all_bn220905478.png
COMMENTS:        Fermi-GBM Final Position.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        The LC_URL file should be available by the time this FINAL notice is produced.  
COMMENTS:        This notice was generated completely by automated pipeline processing.  
COMMENTS:        This is likely a Long GRB.

GCN Circular #32518
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
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
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
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.

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Jochen Greiner, last update: 11-Sep-2022 [Disclaimer]