Gamma-ray Burst 231129A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

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Results of Observations

GCN/BACODINE POSITION NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:06:22 UT
NOTICE_TYPE:     Swift-BAT GRB Position
TRIGGER_NUM:     1199764,   Seg_Num: 0
GRB_RA:          317.536d {+21h 10m 09s} (J2000),
                 317.763d {+21h 11m 03s} (current),
                 317.062d {+21h 08m 15s} (1950)
GRB_DEC:         +41.544d {+41d 32' 37"} (J2000),
                 +41.642d {+41d 38' 31"} (current),
                 +41.339d {+41d 20' 20"} (1950)
GRB_ERROR:       3.00 [arcmin radius, statistical only]
GRB_INTEN:       2920 [cnts]    Image_Peak=204 [image_cnts]
TRIGGER_DUR:     1.024 [sec] 
TRIGGER_INDEX:   146     E_range: 25-100 keV
BKG_INTEN:       14674 [cnts]
BKG_TIME:        18343.54 SOD {05:05:43.54} UT
BKG_DUR:         8 [sec]
GRB_DATE:        20277 TJD;   333 DOY;   23/11/29
GRB_TIME:        18359.09 SOD {05:05:59.09} UT
GRB_PHI:         -20.50 [deg]
GRB_THETA:        42.36 [deg]
SOLN_STATUS:     0x30000003
RATE_SIGNIF:     22.51 [sigma]
IMAGE_SIGNIF:    10.94 [sigma]
MERIT_PARAMS:     +1  +0  +0  +0  +2  +0  +0  +1  +3  +0 
SUN_POSTN:       244.86d {+16h 19m 27s}  -21.43d {-21d 25' 32"}
SUN_DIST:         92.19 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       88.89d {+05h 55m 33s}  +28.11d {+28d 06' 53"}
MOON_DIST:        96.92 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.81, -4.39 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      340.11, 54.04 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Coordinates.  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 214.90,-2.23 [deg].  
COMMENTS:           
COMMENTS:        NOTE: This BAT event is spatially(0.00<0.1deg) and temporally(0.0<100sec) coincident with the INTEGRAL event (trignum=10436).

red DSS finding chart ps-file

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Wed 29 Nov 23 05:06:12 UT
NOTICE_TYPE:    INTEGRAL Weak
TRIGGER_NUM:    10436,   Sub_Num: 0
GRB_RA:         317.5395d {+21h 10m 09s} (J2000),
                317.7663d {+21h 11m 04s} (current),
                317.0654d {+21h 08m 16s} (1950)
GRB_DEC:        +41.5042d {+41d 30' 15"} (J2000),
                +41.6026d {+41d 36' 09"} (current),
                +41.2996d {+41d 17' 59"} (1950)
GRB_ERROR:      3.47 [arcmin, radius, statistical only]
GRB_INTEN:      7.21 [sigma]
GRB_TIME:       18359.54 SOD {05:05:59.54} UT
GRB_DATE:       20277 TJD;   333 DOY;   23/11/29
SC_RA:          304.33 [deg] (J2000)
SC_DEC:          36.52 [deg] (J2000)
SUN_POSTN:      244.86d {+16h 19m 27s}  -21.43d {-21d 25' 31"}
SUN_DIST:        92.17 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      88.89d {+05h 55m 33s}  +28.11d {+28d 06' 53"}
MOON_DIST:       96.94 [deg]
GAL_COORDS:      84.78, -4.42 [deg] galactic lon,lat of the burst
ECL_COORDS:     340.08, 54.01 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates -- this is the weak/subthreshold trigger notice.
COMMENTS:       This notice may or may not be followed by a Wakeup/Refined/Offline notice.
COMMENTS:       Time_Scale=0.1599 and Time_Error=2.0000.  
COMMENTS:       Possibly real GRB event (WEAK detection)

GCN NOTICE

TITLE:          GCN/INTEGRAL NOTICE
NOTICE_DATE:    Wed 29 Nov 23 05:06:16 UT
NOTICE_TYPE:    INTEGRAL Wakeup
TRIGGER_NUM:    10436,   Sub_Num: 1
GRB_RA:         317.5784d {+21h 10m 19s} (J2000),
                317.8052d {+21h 11m 13s} (current),
                317.1043d {+21h 08m 25s} (1950)
GRB_DEC:        +41.5278d {+41d 31' 40"} (J2000),
                +41.6262d {+41d 37' 34"} (current),
                +41.3230d {+41d 19' 23"} (1950)
GRB_ERROR:      3.17 [arcmin, radius, statistical only]
GRB_INTEN:      8.86 [sigma]
GRB_TIME:       18359.53 SOD {05:05:59.53} UT
GRB_DATE:       20277 TJD;   333 DOY;   23/11/29
SC_RA:          304.33 [deg] (J2000)
SC_DEC:          36.52 [deg] (J2000)
SUN_POSTN:      244.86d {+16h 19m 27s}  -21.43d {-21d 25' 31"}
SUN_DIST:        92.21 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:      88.89d {+05h 55m 33s}  +28.11d {+28d 06' 53"}
MOON_DIST:       96.91 [deg]
GAL_COORDS:      84.82, -4.43 [deg] galactic lon,lat of the burst
ECL_COORDS:     340.14, 54.01 [deg] ecliptic lon,lat of the burst
COMMENTS:       INTEGRAL GRB Coordinates.  
COMMENTS:       Time_Scale=2.0000 and Time_Error=2.0000.
COMMENTS:       Possibly real GRB event

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:08:27 UT
NOTICE_TYPE:     Swift-XRT Image
TRIGGER_NUM:     1199764,   Seg_Num: 0
GRB_RA:          317.5476d {+21h 10m 11.4s} (J2000),
                 317.7744d {+21h 11m 05.8s} (current),
                 317.0736d {+21h 08m 17.6s} (1950)
GRB_DEC:         +41.5225d {+41d 31' 21.0"} (J2000),
                 +41.6209d {+41d 37' 15.1"} (current),
                 +41.3179d {+41d 19' 04.3"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       48 [cnts]
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18471.10 SOD {05:07:51.10} UT,   112.0 [sec] since BAT Trigger Time
CENTROID_X:      355.67,  raw= 356  [pixels]
CENTROID_Y:      332.79,  raw= 333  [pixels]
ROLL:            242.77 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   81.77
GRB_POS_XRT_Z:   113.79
IMAGE_URL:       sw01199764000msxps_rw.img
SUN_POSTN:       244.86d {+16h 19m 27s}  -21.43d {-21d 25' 32"}
SUN_DIST:         92.19 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       88.91d {+05h 55m 39s}  +28.12d {+28d 06' 56"}
MOON_DIST:        96.94 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.80, -4.41 [deg] galactic lon,lat of the burst
ECL_COORDS:      340.10, 54.02 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:08:31 UT
NOTICE_TYPE:     Swift-XRT Processed Image
TRIGGER_NUM:     1199764,   Seg_Num: 0
GRB_RA:          317.5476d {+21h 10m 11.4s} (J2000),
                 317.7744d {+21h 11m 05.8s} (current),
                 317.0736d {+21h 08m 17.6s} (1950)
GRB_DEC:         +41.5225d {+41d 31' 21.0"} (J2000),
                 +41.6209d {+41d 37' 15.1"} (current),
                 +41.3179d {+41d 19' 04.3"} (1950)
GRB_ERROR:       5.4 [arcsec, radius, statistical plus systematic]
GRB_INTEN:       48 [cnts]
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18471.10 SOD {05:07:51.10} UT,   112.0 [sec] since BAT Trigger Time
CENTROID_X:      355.67,  raw= 356  [pixels]
CENTROID_Y:      332.79,  raw= 333  [pixels]
ROLL:            242.77 [deg]
GAIN:            1
MODE:            2, Short Image mode
WAVEFORM:        134
EXPO_TIME:       0.10 [sec]
GRB_POS_XRT_Y:   81.77
GRB_POS_XRT_Z:   113.79
IMAGE_URL:       sw01199764000msxps_rw.img
SUN_POSTN:       244.86d {+16h 19m 27s}  -21.43d {-21d 25' 32"}
SUN_DIST:         92.19 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       88.91d {+05h 55m 39s}  +28.12d {+28d 06' 56"}
MOON_DIST:        96.94 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.80, -4.41 [deg] galactic lon,lat of the burst
ECL_COORDS:      340.10, 54.02 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Processed Image.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:08:17 UT
NOTICE_TYPE:     Swift-XRT Position
TRIGGER_NUM:     1199764,   Seg_Num: 0
GRB_RA:          317.5476d {+21h 10m 11.42s} (J2000),
                 317.7744d {+21h 11m 05.86s} (current),
                 317.0736d {+21h 08m 17.66s} (1950)
GRB_DEC:         +41.5225d {+41d 31' 21.0"} (J2000),
                 +41.6209d {+41d 37' 15.1"} (current),
                 +41.3179d {+41d 19' 04.3"} (1950)
GRB_ERROR:       5.4 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       3.05e-08 [erg/cm2/sec]
GRB_SIGNIF:      6.92 [sigma]
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18471.10 SOD {05:07:51.10} UT,   112.0 [sec] since BAT Trigger Time
TAM[0-3]:        327.67 237.20 261.80 243.46
AMPLIFIER:       2
WAVEFORM:        134
SUN_POSTN:       244.86d {+16h 19m 27s}  -21.43d {-21d 25' 32"}
SUN_DIST:         92.19 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       88.91d {+05h 55m 38s}  +28.12d {+28d 06' 56"}
MOON_DIST:        96.93 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.80, -4.41 [deg] galactic lon,lat of the burst
ECL_COORDS:      340.10, 54.02 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        The XRT position is 1.36 arcmin from the BAT position.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:09:28 UT
NOTICE_TYPE:     Swift-BAT GRB Lightcurve
TRIGGER_NUM:     1199764,   Seg_Num: 0
GRB_RA:          317.536d {+21h 10m 09s} (J2000),
                 317.763d {+21h 11m 03s} (current),
                 317.062d {+21h 08m 15s} (1950)
GRB_DEC:         +41.544d {+41d 32' 37"} (J2000),
                 +41.642d {+41d 38' 31"} (current),
                 +41.339d {+41d 20' 20"} (1950)
GRB_DATE:        20277 TJD;   333 DOY;   23/11/29
GRB_TIME:        18359.09 SOD {05:05:59.09} UT
TRIGGER_INDEX:   146
GRB_PHI:         -20.50 [deg]
GRB_THETA:        42.36 [deg]
DELTA_TIME:      45.00 [sec]
TRIGGER_DUR:     1.024 [sec] 
SOLN_STATUS:     0x3
RATE_SIGNIF:     22.51 [sigma]
IMAGE_SIGNIF:    10.94 [sigma]
LC_URL:          sw01199764000msb.lc
SUN_POSTN:       244.86d {+16h 19m 27s}  -21.43d {-21d 25' 33"}
SUN_DIST:         92.19 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       88.92d {+05h 55m 41s}  +28.12d {+28d 06' 58"}
MOON_DIST:        96.93 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.81, -4.39 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      340.11, 54.04 [deg] ecliptic lon,lat of the burst (or transient)
COMMENTS:        SWIFT-BAT GRB Lightcurve.  
COMMENTS:           
COMMENTS:        The next comments were copied from the BAT_POS Notice:  
COMMENTS:        This is a rate trigger.  
COMMENTS:        A point_source was found.  
COMMENTS:        This does not match any source in the on-board catalog.  
COMMENTS:        This does not match any source in the ground catalog.  
COMMENTS:        This is a GRB.  
COMMENTS:        This trigger occurred at longitude,latitude = 214.90,-2.23 [deg].

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:10:52 UT
NOTICE_TYPE:     Swift-UVOT Source List
TRIGGER_NUM:     1199764,   Seg_Num: 0
POINT_RA:        317.495d {+21h 09m 59s} (J2000)
POINT_DEC:       +41.528d {+41d 31' 42"} (J2000)
POINT_ROLL:      242.771d
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18479.35 SOD {05:07:59.35} UT,   120.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.620
N_STARS:         190
X_OFFSET:        264 [pixels]
Y_OFFSET:        672 [pixels]
X_MAX:           1223 [pixels]
Y_MAX:           1631 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw01199764000msufc0120.fits
SUN_POSTN:       244.86d {+16h 19m 27s}  -21.43d {-21d 25' 33"}
SUN_DIST:         92.15 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       88.94d {+05h 55m 44s}  +28.12d {+28d 06' 60"}
MOON_DIST:        96.97 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.78, -4.38 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      340.05, 54.05 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Source List.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:11:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Source List
TRIGGER_NUM:     1199764,   Seg_Num: 0
POINT_RA:        317.495d {+21h 09m 59s} (J2000)
POINT_DEC:       +41.528d {+41d 31' 42"} (J2000)
POINT_ROLL:      242.771d
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18479.35 SOD {05:07:59.35} UT,   120.3 [sec] since BAT Trigger Time
FILTER:          10, White
BKG_MEAN:        2.620
N_STARS:         190
X_OFFSET:        264 [pixels]
Y_OFFSET:        672 [pixels]
X_MAX:           1223 [pixels]
Y_MAX:           1631 [pixels]
DET_THRESH:      13
PHOTO_THRESH:    7
SL_URL:          sw01199764000msufc0120.fits
SUN_POSTN:       244.86d {+16h 19m 28s}  -21.43d {-21d 25' 34"}
SUN_DIST:         92.15 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       88.94d {+05h 55m 45s}  +28.12d {+28d 06' 60"}
MOON_DIST:        96.97 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.78, -4.38 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      340.05, 54.05 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Source List.  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_srclist.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:12:23 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     1199764,   Seg_Num: 0
POINT_RA:        317.495d {+21h 09m 59s} (J2000)
POINT_DEC:       +41.528d {+41d 31' 42"} (J2000)
ROLL:            242.771d
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18479.35 SOD {05:07:59.35} UT,   120.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     722927311
X_OFFSET:        516 [pixels]
Y_OFFSET:        842 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       676
Y_GRB_POS:       1002
BINNING_INDEX:   1
IM_URL:          sw01199764000msuni0153.fits
SUN_POSTN:       244.87d {+16h 19m 28s}  -21.43d {-21d 25' 34"}
SUN_DIST:         92.15 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       88.95d {+05h 55m 48s}  +28.12d {+28d 07' 02"}
MOON_DIST:        96.98 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.78, -4.38 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      340.05, 54.05 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:12:33 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     1199764,   Seg_Num: 0
POINT_RA:        317.495d {+21h 09m 59s} (J2000)
POINT_DEC:       +41.528d {+41d 31' 42"} (J2000)
ROLL:            242.771d
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18479.35 SOD {05:07:59.35} UT,   120.3 [sec] since BAT Trigger Time
FILTER:          10, White
EXPOSURE_ID:     722927311
X_OFFSET:        516 [pixels]
Y_OFFSET:        842 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       676
Y_GRB_POS:       1002
BINNING_INDEX:   1
IM_URL:          sw01199764000msuni0153.fits
SUN_POSTN:       244.87d {+16h 19m 28s}  -21.43d {-21d 25' 34"}
SUN_DIST:         92.15 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       88.95d {+05h 55m 49s}  +28.12d {+28d 07' 02"}
MOON_DIST:        96.98 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.78, -4.38 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      340.05, 54.05 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        All 4 attachments are included.

GCN Circular #35208
J.D. Gropp (PSU), N. J. Klingler (GSFC/UMBC/CRESSTII), D. M. Palmer (LANL), M. H. Siegel (PSU) and A. Tohuvavohu (U Toronto) report on behalf of the Neil Gehrels Swift Observatory Team:
At 05:05:59 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 231129A (trigger=1199764). Swift slewed immediately to the burst. The BAT on-board calculated location is RA, Dec 317.536, +41.544 which is
```
   RA(J2000) = 21h 10m 09s
   Dec(J2000) = +41d 32' 37"
```
with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a complex structure with a duration of about 120 sec. The peak count rate was ~3700 counts/sec (15-350 keV), at ~90 sec after the trigger.
The XRT began observing the field at 05:07:51.1 UT, 112.0 seconds after the BAT trigger. Using promptly downlinked data we find a bright, uncatalogued X-ray source located at RA, Dec 317.54581, 41.52062 which is equivalent to:
```
   RA(J2000)  = 21h 10m 10.99s
   Dec(J2000) = +41d 31' 14.2"
```
with an uncertainty of 4.0 arcseconds (radius, 90% containment). This location is 88 arcseconds from the BAT onboard position, within the BAT error circle. This position may be improved as more data are received; the latest position is available at https://www.swift.ac.uk/sper. We cannot determine whether the source is fading at the present time. No spectrum from the promptly downlinked event data is yet available to determine the column density.
The initial flux in the 0.1 s image was 3.05e-08 erg cm^-2 s^-1 (0.2-10 keV).
UVOT took a finding chart exposure of 150 seconds with the White filter starting 120 seconds after the BAT trigger. No credible afterglow candidate has been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag. Results from the list of sources generated on-board are not available at this time. No correction has been made for the large, but uncertain, extinction expected.
Burst Advocate for this burst is J.D. Gropp (jdg44 AT psu.edu). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/)

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:19:51 UT
NOTICE_TYPE:     Swift-UVOT Image
TRIGGER_NUM:     1199764,   Seg_Num: 0
POINT_RA:        317.497d {+21h 09m 59s} (J2000)
POINT_DEC:       +41.528d {+41d 31' 41"} (J2000)
ROLL:            242.772d
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18691.88 SOD {05:11:31.88} UT,   332.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     722927524
X_OFFSET:        516 [pixels]
Y_OFFSET:        842 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       676
Y_GRB_POS:       1002
BINNING_INDEX:   1
IM_URL:          sw01199764000msuni0365.fits
SUN_POSTN:       244.87d {+16h 19m 29s}  -21.43d {-21d 25' 37"}
SUN_DIST:         92.15 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       89.03d {+05h 56m 06s}  +28.12d {+28d 07' 12"}
MOON_DIST:        97.01 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.78, -4.38 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      340.05, 54.04 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:20:06 UT
NOTICE_TYPE:     Swift-UVOT Processed Image
TRIGGER_NUM:     1199764,   Seg_Num: 0
POINT_RA:        317.497d {+21h 09m 59s} (J2000)
POINT_DEC:       +41.528d {+41d 31' 41"} (J2000)
ROLL:            242.772d
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18691.88 SOD {05:11:31.88} UT,   332.8 [sec] since BAT Trigger Time
FILTER:          7, U
EXPOSURE_ID:     722927524
X_OFFSET:        516 [pixels]
Y_OFFSET:        842 [pixels]
WIDTH:           160 [pixels]
HEIGHT:          160 [pixels]
X_GRB_POS:       676
Y_GRB_POS:       1002
BINNING_INDEX:   1
IM_URL:          sw01199764000msuni0365.fits
SUN_POSTN:       244.87d {+16h 19m 29s}  -21.43d {-21d 25' 37"}
SUN_DIST:         92.15 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       89.03d {+05h 56m 07s}  +28.12d {+28d 07' 13"}
MOON_DIST:        97.01 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.78, -4.38 [deg] galactic lon,lat of the pointing direction
ECL_COORDS:      340.05, 54.04 [deg] ecliptic lon,lat of the pointing direction
COMMENTS:        SWIFT-UVOT Processed Image.  
COMMENTS:        The GRB Position came from the XRT Position Command.  
COMMENTS:        The image has 2x2 binning (compression).  
COMMENTS:        If you have elected to receive attachments:  
COMMENTS:        The uvot_catalog_image.fits.gz file does not exist; skipping the attachment.

GCN NOTICE

TITLE:           GCN/SWIFT NOTICE
NOTICE_DATE:     Wed 29 Nov 23 05:29:36 UT
NOTICE_TYPE:     Swift-XRT Position UPDATE
TRIGGER_NUM:     1199764,   Seg_Num: 0
GRB_RA:          317.5456d {+21h 10m 10.94s} (J2000),
                 317.7724d {+21h 11m 05.38s} (current),
                 317.0716d {+21h 08m 17.18s} (1950)
GRB_DEC:         +41.5206d {+41d 31' 14.1"} (J2000),
                 +41.6190d {+41d 37' 08.3"} (current),
                 +41.3160d {+41d 18' 57.4"} (1950)
GRB_ERROR:       3.8 [arcsec radius, statistical plus systematic, 90% containment]
GRB_INTEN:       1.00e-10 [erg/cm2/sec]
GRB_SIGNIF:      10.00 [sigma]
IMG_START_DATE:  20277 TJD;   333 DOY;   23/11/29
IMG_START_TIME:  18651.00 SOD {05:10:51.00} UT,   291.9 [sec] since BAT Trigger Time
TAM[0-3]:        100.00 100.00 100.00 100.00
AMPLIFIER:       1
WAVEFORM:        31
SUN_POSTN:       244.88d {+16h 19m 31s}  -21.43d {-21d 25' 41"}
SUN_DIST:         92.18 [deg]   Sun_angle= -4.9 [hr] (East of Sun)
MOON_POSTN:       89.13d {+05h 56m 30s}  +28.12d {+28d 07' 26"}
MOON_DIST:        97.04 [deg]
MOON_ILLUM:      96 [%]
GAL_COORDS:       84.80, -4.41 [deg] galactic lon,lat of the burst
ECL_COORDS:      340.10, 54.02 [deg] ecliptic lon,lat of the burst
COMMENTS:        SWIFT-XRT Coordinates.  
COMMENTS:        This Notice was ground-generated -- not flight-generated.  
COMMENTS:        This is an Update Notice -- the RA,Dec values herein supersede the previous XRT_POS Notice.  
COMMENTS:        TAM values, flux and significance fields are not valid.  
COMMENTS:        This position was automatically generated on the ground using  
COMMENTS:        Photon Counting data telemetered via TDRSS (SPER data).  
COMMENTS:        See http://www.swift.ac.uk/sper/docs.php for details.  
COMMENTS:        The probability that this is a serendipitous source in the  
COMMENTS:        SPER window is 0.58% < P(seren) < 1.1%.

GCN Circular #35209
S.Mereghetti (INAF, IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, V.Savchenko (ISDC, Versoix), L.Ducci (IAAT, Germany and ISDC, Versoix) and J.Borkowski (CAMK, Torun) report:
a gamma ray burst lasting about 150 s has been detected by IBAS in the IBIS/ISGRI data at 05:05:59 UT of November 25, 2023. The burst has also been detected by Swift (Gropp et al. GCN 35208)
The refined coordinates (J2000) are:
```
R.A.=  317.53411 deg
DEC.=  +41.51942 deg
```
with an uncertainty of 1.5 arcmin (90% c.l.).
The burst had a peak flux of about 0.5 ph/cm2/s (20-200 keV, 1-s integration time) and a fluence in the same energy range of about 6e-7 erg/cmq.
A plot of the light curve will be posted at http://ibas.iasf-milano.inaf.it/IBAS_Results.html
GCN Circular #35210
Wen-Long Zhang, Shao-Lin Xiong report on behalf of the GECAM team:
GECAM-C was triggered in-flight by a long burst, GRB 231129A, at 2023-11-29T05:06:01.850 UTC (T0), which was also observed by Swift/BAT (GCN #35208) and INTEGRAL (GCN #35209).
According to the realtime alert data, the GECAM-C light curve shows roughly two peaks with a total duration of ~80 sec (15-1050 keV).
The time-averaged spectrum of GECAM-C realtime data from about T0 to T0+4 s could be adequately fit by a cut-off power-law with a fluence about 1.84E-6 erg/cm^2 in 20-1000 keV.
GECAM location is consistent with that of Swift/BAT and INTEGRAL within the error. We note that these results are based on realtime alert data and thus very preliminary. Refined analysis will be reported later.
Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM) mission originally consists of two microsatellites (GECAM-A and GECAM-B) launched in Dec. 2020. As the third member of GECAM constellation, GECAM-C was launched onboard SATech-01 experimental satellite in July 2022. GECAM mission is funded by the Chinese Academy of Sciences (CAS).
GCN Circular #35212
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) was pointed to the Integral GRB231129.21 (trigger No 10436,21h 10m 18.76s , +41d 31m 39.2s, R=0.0528333) errorbox 17767 sec after notice time and 17792 sec after trigger time at 2023-11-29 10:02:31 UT, with upper limit up to 15.1 mag. Observations started at twilight. The observations began at zenith distance = 9 deg. The sun altitude is -8.7 deg.
The galactic latitude b = -5 deg., longitude l = 85 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2319548
We obtain a following upper limits.
```
Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   17795 |        MASTER-Tunka |   C |     5 | 13.3 |        
   17820 |        MASTER-Tunka |   C |     5 | 13.4 |        
   17846 |        MASTER-Tunka |   C |    10 | 13.0 |        
   17878 |        MASTER-Tunka |   C |    15 | 13.5 |        
   17917 |        MASTER-Tunka |   C |    26 | 13.7 |        
   17967 |        MASTER-Tunka |   C |    36 | 13.6 |        
   18027 |        MASTER-Tunka |   C |    45 | 13.9 |        
   18099 |        MASTER-Tunka |   C |    60 | 13.9 |        
   18178 |        MASTER-Tunka |   C |    60 | 14.1 |        
   18273 |        MASTER-Tunka |   C |    90 | 14.1 |        
   18491 |        MASTER-Tunka |   C |    90 | 14.8 |        
   18600 |        MASTER-Tunka |   C |    90 | 14.6 |        
   18755 |        MASTER-Tunka |   C |   180 | 14.4 |        
   19151 |        MASTER-Tunka |   C |   180 | 14.9 |        
   20388 |        MASTER-Tunka |   C |   180 | 15.1 |        
```
Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.
GCN Circular #35218
D.N. Burrows (PSU), J. D. Gropp (PSU), S. Dichiara (PSU), J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore (U. Leicester), P. D'Avanzo (INAF-OAB), M.G. Bernardini (INAF-OAB), E. Ambrosi (INAF-IASFPA) and P.A. Evans report on behalf of the Swift-XRT team:
We have analysed 7.0 ks of XRT data for GRB 231129A, from 115 s to 43.8 ks after the BAT trigger. The data comprise 174 s in Windowed Timing (WT) mode with the remainder in Photon Counting (PC) mode. The refined XRT position is RA, Dec = 317.5437, +41.5206 which is equivalent to:
```
RA (J2000): 21 10 10.49
Dec(J2000): +41 31 14.2
```
with an uncertainty of 3.5 arcsec (radius, 90% confidence).
The light curve can be modelled with a series of power-law decays. The initial decay index is alpha=4.86 (+/-0.21). At T+165 s the decay steepens to an alpha of 6.44 (+0.28, -0.24) before breaking again at T+308 s to a final decay with index alpha=0.83 (+0.05, -0.06).
A spectrum formed from the WT mode data can be fitted with an absorbed power-law with a photon spectral index of 1.83 (+/-0.07). The best-fitting absorption column is 1.09 (+/-0.08) x 10^22 cm^-2, in excess of the Galactic value of 5.9 x 10^21 cm^-2 (Willingale et al. 2013). The PC mode spectrum has a photon index of 2.18 (+0.31, -0.29) and a best-fitting absorption column of 1.6 (+/-0.4) x 10^22 cm^-2. The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 5.0 x 10^-11 (1.2 x 10^-10) erg cm^-2 count^-1.
A summary of the PC-mode spectrum is thus:
```
Total column:	     1.6 (+/-0.4) x 10^22 cm^-2
Galactic foreground: 5.9 x 10^21 cm^-2
Excess significance: 4.5 sigma
Photon index:	     2.18 (+0.31, -0.29)
```
If the light curve continues to decay with a power-law decay index of 0.83, the count rate at T+24 hours will be 0.014 count s^-1, corresponding to an observed (unabsorbed) 0.3-10 keV flux of 7.2 x 10^-13 (1.8 x 10^-12) erg cm^-2 s^-1.
The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/01199764.
This circular is an official product of the Swift-XRT team.
GCN Circular #35220
M.R. Goad, J.P. Osborne, A.P. Beardmore and P.A. Evans (U. Leicester) report on behalf of the Swift-XRT team.
Using 2261 s of XRT Photon Counting mode data and 6 UVOT images for GRB 231129A, we find an astrometrically corrected X-ray position (using the XRT-UVOT alignment and matching UVOT field sources to the USNO-B1 catalogue): RA, Dec = 317.54381, +41.52204 which is equivalent to:
```
RA (J2000): 21h 10m 10.51s
Dec (J2000): +41d 31' 19.4"
```
with an uncertainty of 2.2 arcsec (radius, 90% confidence).
This position may be improved as more data are received. The latest position can be viewed at http://www.swift.ac.uk/xrt_positions. Position enhancement is described by Goad et al. (2007, A&A, 476, 1401) and Evans et al. (2009, MNRAS, 397, 1177).
This circular was automatically generated, and is an official product of the Swift-XRT team.
GCN Circular #35232
S. Belkin (IKI), E. Klunko (ISTP), A. Pozanenko (IKI), N. Pankov (IKI, HSE) report on behalf of GRB IKI FuN:
We observed the field of Swift GRB 231129A (Gropp et al., GCN 35208; Mereghetti et al., GCN 35209; Zhang et al., GCN 35210) with AZT-33IK telescope of Mondy observatory in R-filter on 2023-11-29 starting (UT) 10:43:30. We do not detect any optical objects within the enhanced Swift-XRT error box (Goad et al., GCN 35220). Preliminary photometry of a stacked image is following
```
Date        UT start   t-T0          Exp.  Filter  OT   Err. UL(3sigma)
                                           (mid, days)  (s)

2023-11-29  10:43:30   0.25730       33x120 R      n/d  n/d  23.1
```
The photometry is based on nearby USNO-B1.0 stars.
```
USNO-B1.0
RA DEC R2
21:10:16.6747200 +41:33:09.000000 17.36
21:10:16.0548000 +41:32:49.822800 18.82
```
GCN Circular #35233
A. A. Breeveld (UCL-MSSL) and J. D. Gropp (PSU) report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 231129A (Gropp et al., GCN circ. 35208; Mereghetti et al., GCN circ. 35209; Zhang et al., GCN circ. 35210) 120 s after the BAT trigger (Gropp et al., GCN Circ. 35208). No optical afterglow consistent with the XRT position (Goad et al., GCN Circ. 35220) is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first finding chart (FC) exposure and subsequent exposures are:
```
Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

white_FC           120          270          147         >20.5
white              120         4158          344         >20.8
v                 4369         4568          197         >18.9
b                 3753         3953          197         >19.4
u                  333         5122          275         >19.9
w1                4780         4980          197         >18.8
m2                4574         4773          197         >18.9
w2                4164         4364          197         >19.2
```
The magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 1.164 in the direction of the burst (Schlegel et al. 1998).
GCN Circular #35237
X. Liu, Z.P. Zhu, J. An, S.Q. Jiang, S.Y. Fu, T.H. Lu, D. Xu (NAOC), S.W Luo, M.M. Yang, Z. K. Feng, L.F. Huo (XJTS) report on behalf of a large collaboration:
We observed the field of GRB 231129A detected by Swift (J.D. Gropp, GCN 35208), INTEGRAL (S.Mereghetti et al., GCN 35209), and GECAM-C (Wen-Long Zhang et al., GCN 35210), using the 100cm C telescope (100C) located at Altay, Xinjiang, China. Observations started at 12:13:36.29 UT on 2023-11-29, i.e., 7.13 hr after the Swift/BAT trigger, and 30*120s frames are obtained in the Sloan-r band.
No credible optical transient is detected in our stacked images within the refined Swift/XRT error region (Burrows et al., GCN 35218), down to a 3-sigma upper limit of r > 21.6 mag, calibrated with nearby PanSTARRS stars and not corrected for Galactic extinction.
GCN Circular #35239
Y.-D. Hu, E. Fernandez-Garcia, A. J. Castro-Tirado, I. Perez-Garcia, M.D. Caballero-Garcia, S.-Y. Wu, R. Sanchez-Ramirez, S. Guziy (IAA-CSIC), D. Hiriart and W. H. Lee (UNAM), C. J. Perez del Pulgar (UMA) and I. M. Carrasco-Garcia (SMA) and I. H. Park (SKKU), on behalf of a larger collaboration, report:
Following the detection of GRB 231129A by Swift (Gropp et al. GCNC 35208), INTEGRAL (Mereghetti et al. GCNC 35209) and GECAM-C (Zhang et al. GCNC 35210), the BOOTES-5/JGT 0.6m robotic telescope at Observatorio Astronomico Nacional in San Pedro Martir (Mexico) automatically observed the GRB location starting on Nov. 29, 05:07 UT (~ 61 s after trigger). No new optical source is detected on the co-added image (15 x 10 s, clear filter) within the Swift/XRT error region (Goad et al. GCNC 35220) down to 19.9 mag, which is consistent with reports from MASTER (Lipunov et al. GCNC 35212), Mondy (Belkin et al. GCNC 35232), UVOT (Breeveld et al. GCNC 35233) and JinShan (Liu et al. GCNC 35237).
We thank the staff at Observatorio Astronomico Nacional in San Pedro Martir for their excellent support.
GCN Circular #35241
D. M. Palmer (LANL), S. D. Barthelmy (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. Moss (GSFC), T. Parsotan (GSFC/UMBC), T. Sakamoto (AGU),M. Stamatikos (OSU) (i.e. the Swift-BAT team):
Using the data set from T-61 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 231129A (trigger #1199764) (Gropp et al., GCN Circ. 35208). The BAT ground-calculated position is RA, Dec = 317.541, 41.530 deg which is
```
   RA(J2000)  =  21h 10m 09.8s
   Dec(J2000) = +41d 31' 48.3"
```
with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 46%.
The BAT light curve shows a complex structure with a duration of ~ 130 sec. T90 (15-350 keV) is 105.46 +- 1.83 sec (estimated error including systematics).
The time-averaged spectrum from T-1.75 to T+118.97 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 1.35 +- 0.17, and Epeak of 83.7 +- 14.6 keV (chi squared 51.44 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 1.3 +- 0.0 x 10^-05 erg/cm2 and the 1-sec peak flux measured from T+88.71 sec in the 15-150 keV band is 4.8 +- 0.3 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.78 +- 0.04 (chi squared 70.95 for 57 d.o.f.). All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/1199764/BA/
GCN Circular #35243
N. Higuchi, I. Takahashi, M. Sasada, M. Niwano, S. Sato, S. Hayatsu, H. Takei, H. Seki, Y. Yatsu and N. Kawai (Tokyo Tech) report on behalf of the MITSuME collaboration:
We observed the field of GRB 231129A (Gropp et al. GCN 35208 and Mereghetti et al. GCN 35209) with the optical three-color (g', Rc, and Ic) CCD cameras attached to the MITSuME 50-cm telescope Akeno.
The observation started at 2023-11-29 08:01:47 UT (2.93 hours after the Swift/BAT and INTEGRAL/IBAS trigger). We stacked the images with good conditions. We did not detect any uncatalogued sources within the enhanced Swift/XRT error region (Goad et al. GCN 35220). We obtained the 5-sigma limits of the stacked images as follows.
```
T0+[hour] | MID-UT | T-EXP[sec] | 5-sigma limits
------------------------------------------------------------------------------------------------
4.50 | 2023-11-29 09:35:41 | 7140 | g'>19.4, Rc>19.0, Ic>18.4
------------------------------------------------------------------------------------------------
T0+ : Elapsed time after the trigger
T-EXP: Total Exposure time
```
We used the PS1 catalog for flux calibration. The catalog magnitudes in PS1 g, r and i bands were converted to our g', Rc and Ic band magnitudes following Tonry et al. (2012), Table 6. The magnitudes are expressed in the AB system. The images were processed in real-time through the MITSuME GPU reduction pipeline (Niwano et al. 2021, PASJ, Vol.73, Issue 1, Pages 4-24; https://github.com/MNiwano/Eclaire).
GCN Circular #35248
M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werne= r (Masaryk U.), M. Ohno (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Obs= ervatory), H. Takahashi (Hiroshima U.), F. Munz , M. Topinka, F. Hroch, N. = Husarikova, J.-P. Breuer (Masaryk U.), J. Hudec, J. Kapus, M. Frajt, M. Rez= enov (Spacemanic s.r.o), R. Laszlo (Needronix), G. Galgoczi (Wigner Researc= h 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. Gro= mes (VZLU), I. Vertat (FEL ZCU) -- the VZLUSAT-2/GRB payload collaboration= .
The long-duration GRB 231129A (Swift/BAT detection: GCN 35208; INTEGRAL/IBI= S detection: GCN 35209; GECAM-C detection: GCN 35210) was detected by the G= RB detector on board of the VZLUSAT-2 3U CubeSat (https://www.vzlusat2.cz/e= n/).
The data acquisition was performed by the GRB detector unit no. 1. The dete= ction was confirmed at the peak time 2023-11-29 05:06:01 UTC. The T90 durat= ion is 157 s and the significance during T90 reaches 21 sigma.
The light curve obtained by VZLUSAT-2 is available here: https://vzlusat2.konkoly.hu/static/share/GRB231129A_GCN_VZLUSAT2.pdf
All VZLUSAT-2 detections are listed at: https://monoceros.physics.muni.cz/h= ea/VZLUSAT-2/ The GRB detectors on VZLUSAT-2 are a demonstration payload for a future Cub= eSat constellation (Werner et al. Proc. SPIE 2018). Two GRB modules of VZLU= SAT-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.

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Jochen Greiner, last update: 01-Dec-2023 [Disclaimer]