Gamma-ray Burst 240607A

(All information courtesy of the instrument teams.)

Previous IAU Circulars

none

Results of Observations

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 07 Jun 24 11:01:52 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      60
TRIGGER_NUM:     739450879
GRB_RA:           17.317d {+01h 09m 16s} (J2000),
                  17.630d {+01h 10m 31s} (current),
                  16.676d {+01h 06m 42s} (1950)
GRB_DEC:          +0.350d {+00d 20' 60"} (J2000),
                  +0.480d {+00d 28' 47"} (current),
                  +0.084d {+00d 05' 02"} (1950)
GRB_ERROR:       3.95 [deg radius, statistical plus systematic]
GRB_INTEN:       1487 [cnts/sec]
DATA_SIGNIF:     143.50 [sigma]
INTEG_TIME:      4.096 [sec]
GRB_DATE:        20468 TJD;   159 DOY;   24/06/07
GRB_TIME:        39674.31 SOD {11:01:14.31} UT
GRB_PHI:         303.00 [deg]
GRB_THETA:        80.00 [deg]
DATA_TIME_SCALE: 4.0960 [sec]
HARD_RATIO:      0.70
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      97%  GRB
2nd_MOST_LIKELY:   2%  Generic Transient
DETECTORS:       0,0,1, 0,1,1, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        76.08d {+05h 04m 20s}  +22.82d {+22d 49' 08"}
SUN_DIST:         60.96 [deg]   Sun_angle= 3.9 [hr] (West of Sun)
MOON_POSTN:       88.95d {+05h 55m 48s}  +28.34d {+28d 20' 19"}
MOON_DIST:        73.39 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      132.52,-62.19 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       16.10, -6.48 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_lc_medres34_bn240607459.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 351.88,17.73 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 07 Jun 24 11:01:43 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      49
TRIGGER_NUM:     739450879
GRB_RA:           20.100d {+01h 20m 24s} (J2000),
                  20.421d {+01h 21m 41s} (current),
                  19.443d {+01h 17m 46s} (1950)
GRB_DEC:         +10.083d {+10d 04' 60"} (J2000),
                 +10.211d {+10d 12' 39"} (current),
                  +9.821d {+09d 49' 17"} (1950)
GRB_ERROR:       4.82 [deg radius, statistical plus systematic]
GRB_INTEN:       1200 [cnts/sec]
DATA_SIGNIF:     59.60 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        20468 TJD;   159 DOY;   24/06/07
GRB_TIME:        39674.31 SOD {11:01:14.31} UT
GRB_PHI:         301.00 [deg]
GRB_THETA:        70.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.51
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      95%  GRB
2nd_MOST_LIKELY:   4%  Generic Transient
DETECTORS:       0,0,1, 0,1,1, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        76.08d {+05h 04m 20s}  +22.82d {+22d 49' 08"}
SUN_DIST:         54.52 [deg]   Sun_angle= 3.7 [hr] (West of Sun)
MOON_POSTN:       88.95d {+05h 55m 48s}  +28.34d {+28d 20' 19"}
MOON_DIST:        66.34 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      134.59,-52.13 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:       22.35,  1.49 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_lc_medres34_bn240607459.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 351.88,17.73 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 07 Jun 24 11:02:02 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      59
TRIGGER_NUM:     739450879
GRB_RA:           17.510d {+01h 10m 02s} (J2000),
                  17.798d {+01h 11m 12s} (current),
                  16.919d {+01h 07m 41s} (1950)
GRB_DEC:         -30.860d {-30d 51' 35"} (J2000),
                 -30.730d {-30d 43' 48"} (current),
                 -31.126d {-31d 07' 32"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
DATA_SIGNIF:     209.60 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        20468 TJD;   159 DOY;   24/06/07
GRB_TIME:        39674.31 SOD {11:01:14.31} UT
GRB_PHI:         317.00 [deg]
GRB_THETA:       108.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   4173 (Gnd S/W Version number)
SUN_POSTN:        76.08d {+05h 04m 20s}  +22.82d {+22d 49' 08"}
SUN_DIST:         77.39 [deg]   Sun_angle= 3.9 [hr] (West of Sun)
MOON_POSTN:       88.95d {+05h 55m 49s}  +28.34d {+28d 20' 19"}
MOON_DIST:        89.90 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      256.57,-84.48 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        2.30,-34.98 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_lc_medres34_bn240607459.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_739450879.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        Bright hard burst in the GBM.  
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:     Fri 07 Jun 24 11:02:44 UT
NOTICE_TYPE:     Fermi-GBM Ground Position
RECORD_NUM:      2
TRIGGER_NUM:     739450879
GRB_RA:           17.630d {+01h 10m 31s} (J2000),
                  17.918d {+01h 11m 40s} (current),
                  17.039d {+01h 08m 09s} (1950)
GRB_DEC:         -30.950d {-30d 56' 59"} (J2000),
                 -30.820d {-30d 49' 13"} (current),
                 -31.216d {-31d 12' 56"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
DATA_SIGNIF:     142.90 [sigma]
DATA_INTERVAL:   4.096 [sec]
GRB_DATE:        20468 TJD;   159 DOY;   24/06/07
GRB_TIME:        39674.31 SOD {11:01:14.31} UT
GRB_PHI:         317.00 [deg]
GRB_THETA:       108.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:        76.08d {+05h 04m 20s}  +22.82d {+22d 49' 08"}
SUN_DIST:         77.36 [deg]   Sun_angle= 3.9 [hr] (West of Sun)
MOON_POSTN:       88.96d {+05h 55m 50s}  +28.34d {+28d 20' 20"}
MOON_DIST:        89.86 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      256.57,-84.34 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        2.36,-35.11 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_lc_medres34_bn240607459.gif
POS_MAP_URL:     http://gcn.gsfc.nasa.gov/notices_f/gbm_gnd_loc_map_739450879.fits
COMMENTS:        Fermi-GBM Ground-calculated Coordinates.  
COMMENTS:        This is likely a Long GRB.  
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.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=10733).

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 07 Jun 24 11:02:03 UT
NOTICE_TYPE:     Fermi-GBM Flight Position
RECORD_NUM:      71
TRIGGER_NUM:     739450879
GRB_RA:          313.633d {+20h 54m 32s} (J2000),
                 314.225d {+20h 56m 54s} (current),
                 312.408d {+20h 49m 38s} (1950)
GRB_DEC:         -70.700d {-70d 42' 00"} (J2000),
                 -70.606d {-70d 36' 19"} (current),
                 -70.890d {-70d 53' 23"} (1950)
GRB_ERROR:       3.37 [deg radius, statistical plus systematic]
GRB_INTEN:       7351 [cnts/sec]
DATA_SIGNIF:     229.90 [sigma]
INTEG_TIME:      1.024 [sec]
GRB_DATE:        20468 TJD;   159 DOY;   24/06/07
GRB_TIME:        39674.31 SOD {11:01:14.31} UT
GRB_PHI:         330.00 [deg]
GRB_THETA:       160.00 [deg]
DATA_TIME_SCALE: 1.0240 [sec]
HARD_RATIO:      0.37
LOC_ALGORITHM:   3 (version number of)
MOST_LIKELY:      95%  GRB
2nd_MOST_LIKELY:   3%  Generic Transient
DETECTORS:       0,0,1, 0,1,1, 0,0,0, 0,0,0, 0,0,
SUN_POSTN:        76.08d {+05h 04m 20s}  +22.82d {+22d 49' 08"}
SUN_DIST:        121.83 [deg]   Sun_angle= 8.1 [hr] (West of Sun)
MOON_POSTN:       88.95d {+05h 55m 49s}  +28.34d {+28d 20' 19"}
MOON_DIST:       130.80 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      323.35,-35.51 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:      290.98,-50.42 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_lc_medres34_bn240607459.gif
COMMENTS:        Fermi-GBM Flight-calculated Coordinates.  
COMMENTS:        This trigger occurred at longitude,latitude = 351.88,17.73 [deg].  
COMMENTS:        The LC_URL file will not be created until ~15 min after the trigger.

GCN NOTICE

TITLE:           GCN/FERMI NOTICE
NOTICE_DATE:     Fri 07 Jun 24 11:10:23 UT
NOTICE_TYPE:     Fermi-GBM Final Position
RECORD_NUM:      0
TRIGGER_NUM:     739450879
GRB_RA:           17.810d {+01h 11m 14s} (J2000),
                  18.097d {+01h 12m 23s} (current),
                  17.222d {+01h 08m 53s} (1950)
GRB_DEC:         -32.080d {-32d 04' 47"} (J2000),
                 -31.951d {-31d 57' 01"} (current),
                 -32.345d {-32d 20' 43"} (1950)
GRB_ERROR:       1.00 [deg radius, statistical only]
GRB_DATE:        20468 TJD;   159 DOY;   24/06/07
GRB_TIME:        39674.31 SOD {11:01:14.31} UT
GRB_PHI:         318.00 [deg]
GRB_THETA:       109.00 [deg]
E_RANGE:         44.032 - 279.965 [keV]
LOC_ALGORITHM:   41731 (Gnd S/W Version number)
SUN_POSTN:        76.09d {+05h 04m 22s}  +22.82d {+22d 49' 10"}
SUN_DIST:         77.92 [deg]   Sun_angle= 3.9 [hr] (West of Sun)
MOON_POSTN:       89.04d {+05h 56m 10s}  +28.34d {+28d 20' 27"}
MOON_DIST:        90.42 [deg]
MOON_ILLUM:      1 [%]
GAL_COORDS:      263.13,-83.44 [deg] galactic lon,lat of the burst (or transient)
ECL_COORDS:        1.88,-36.18 [deg] ecliptic lon,lat of the burst (or transient)
LC_URL:          http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_lc_medres34_bn240607459.gif
LOC_URL:         http://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_locplot_all_bn240607459.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.  
COMMENTS:           
COMMENTS:        NOTE: This GBM event is temporally(2.0<100sec) coincident with the INTEGRAL_SPIACS event (trignum=10733).

GCN Circular #36634
The Fermi GBM team reports the detection of a likely LONG GRB
At 11:01:14 UT on 7 Jun 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240607A (trigger 739450879.31047 / 240607459).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 17.8, Dec = -32.1 (J2000 degrees, equivalent to J2000 01h 11m, -32d 06'), with a statistical uncertainty of 1.0 degrees.
The angle from the Fermi LAT boresight is 109.0 degrees.
The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_skymap_all_bn240607459.png
The HEALPix FITS file, including the estimated localization systematic, can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_healpix_all_bn240607459.fit
The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240607459/quicklook/glg_lc_medres34_bn240607459.gif
GCN Circular #36635
T. Preis, B. Biltzinger, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger 739450879 at 11:01:14 on 07 June 2024 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 is:
```
RA(2000.0) = 17.7 deg
Decl.(2000.0) = -28.8 deg
```
The 1 sigma statistical error radius is 0.9 deg. We estimate an additional systematic error of 1 deg.
Further details are available at: https://grb.mpe.mpg.de/grb/GRB240607459/
The Healpix map can be downloaded from: https://grb.mpe.mpg.de/grb/GRB240607459/healpix
The location parameters are available as JSON at: https://grb.mpe.mpg.de/grb/GRB240607459/json
GCN Circular #36637
S. Dalessi (UAH) reports on behalf of the Fermi GBM Team: "At 11:01:14.31 UT on 7 June 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240607A (trigger 739450879/240607459). The final localization can be found in GCN 36634.
The GBM light curve consists of three bright pulses, with the bulk of the emission during the first 15 seconds, and continued emission out to roughly 30 seconds. This event is a very bright GRB (up to 10,000 counts/s over 50-300 keV) and follow-up across all wavelengths is encouraged.
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 17.8, Dec = -32.1 (J2000 degrees, equivalent to J2000 01h 11m, -32d 06'), with a statistical uncertainty of 1.0 degrees. (radius, 1-sigma containment, statistical only; there is additionally a systematic error which we have characterized as a core-plus-tail model, with 90% of GRBs having a 3.7 deg error and a small tail suffering a larger than 10 deg systematic error. [Connaughton et al. 2015, ApJS, 216, 32] ).
The angle from the Fermi LAT boresight is 109.0 degrees.
GCN Circular #36638
G. Waratkar (IITB), V. Jethwani (IITB), A. Dasgupta (BITS Hyderabad), J. Joshi (IUCAA), 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 the detection of the bright long-duration GRB 240607A which was also detected by Fermi-GBM (GCN Circ. 36634).
The source was clearly detected in the CZT detectors in the 20-200 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2024-06-07 11:01:25.500 UTC. The measured peak count rate associated with the burst is 880 (+57, -64) counts/s above the background in the combined data of all quadrants, with a total of 3987 (+214, -257) counts. The local mean background count rate was 447 (+5, -5) counts/s. Using cumulative rates, we measure a T90 of 12.3 (+0.3, -0.4) s.
It was also clearly detected in the CsI anticoincidence (Veto) detector in the 100-500 keV energy range. The light curve showed multiple peaks of emission with the strongest peak at 2024-06-07 11:01:24.9 UTC. The measured peak count rate is 4919 (+128, -137) counts/s above the background in the combined Veto data of all quadrants, with a total of 23001 (+510, -531) counts. The local mean background count rate was 1474 (+5, -5) counts/s. We measure a T90 of 12.6 (+0.2, -0.2) s from the cumulative Veto light curve.
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.
CZTI GRB detections are reported regularly on the payload site at: http://astrosat.iucaa.in/czti/?q=grb
GCN Circular #36641
S. Dalessi (UAH) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team:
"At 11:01:14.31 UT on 07 June 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240607A (trigger 739450879/240607459), which was also detected by AstroSat (G. Waratkar et al. 2024, GCN 36638) and INTEGRAL/SPI-ACS (trigger #10733). The final localization can be found in GCN 36634 as well as the notice of a bright burst (S. Dalessi et al. 2024, GCN 36637).
The angle from the Fermi LAT boresight is 109 degrees.
The GBM light curve three pulses with a duration (T90) of about 20.2 s (50-300 keV). The time-averaged spectrum from T0+0.002 to T0+27.136 s is best fit by a Band function with Epeak = 247 +/- 4 keV, alpha = -0.92 +/- 0.01, and beta = -2.69 +/- 0.07.
The event fluence (10-1000 keV) in this time interval is (9.2 +/- 0.5)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+11 s in the 10-1000 keV band is 95.8 +/- 0.8 ph/s/cm^2.
The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"

GCN Circular #36643
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-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 240607A ( Fermi GBM team, GCN 36634) errorbox 46211 sec after notice time and 46269 sec after trigger time at 2024-06-07 23:52:24 UT, with upper limit up to 19.8 mag. The observations began at zenith distance = 82 deg. The sun altitude is -71.1 deg.
The galactic latitude b = -83 deg., longitude l = 258 deg.
Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=2485082
We obtain a following upper limits.

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   46300 | 2024-06-07 23:52:24 |         MASTER-SAAO | (01h 07m 30.46s , -32d 11m 36.6s) |   C |    60 | 19.4 |        
   46360 | 2024-06-07 23:52:24 |         MASTER-SAAO | (01h 07m 30.47s , -32d 11m 36.5s) |   C |   180 | 19.6 |  Coadd 
   46379 | 2024-06-07 23:53:43 |         MASTER-SAAO | (01h 07m 36.97s , -32d 11m 29.9s) |   C |    60 | 19.3 |        
   46459 | 2024-06-07 23:55:03 |         MASTER-SAAO | (01h 07m 34.10s , -32d 09m 58.5s) |   C |    60 | 19.2 |        
   46544 | 2024-06-07 23:56:28 |         MASTER-SAAO | (01h 07m 34.25s , -32d 10m 58.2s) |   C |    60 | 19.4 |        
   46604 | 2024-06-07 23:56:28 |         MASTER-SAAO | (01h 07m 34.26s , -32d 10m 58.1s) |   C |   180 | 19.7 |  Coadd 
   46624 | 2024-06-07 23:57:47 |         MASTER-SAAO | (01h 07m 38.48s , -32d 09m 41.5s) |   C |    60 | 19.4 |        
   46703 | 2024-06-07 23:59:07 |         MASTER-SAAO | (01h 07m 31.69s , -32d 10m 22.6s) |   C |    60 | 19.4 |        
   46782 | 2024-06-08 00:00:26 |         MASTER-SAAO | (01h 07m 32.38s , -32d 09m 21.6s) |   C |    60 | 19.5 |        
   46842 | 2024-06-08 00:00:26 |         MASTER-SAAO | (01h 07m 32.39s , -32d 09m 21.4s) |   C |   180 | 19.7 |  Coadd 
   46861 | 2024-06-08 00:01:45 |         MASTER-SAAO | (01h 07m 38.82s , -32d 10m 20.7s) |   C |    60 | 19.4 |        
   46941 | 2024-06-08 00:03:05 |         MASTER-SAAO | (01h 07m 31.52s , -32d 11m 20.1s) |   C |    60 | 19.5 |        
   47020 | 2024-06-08 00:04:24 |         MASTER-SAAO | (01h 07m 38.65s , -32d 11m 10.1s) |   C |    60 | 19.5 |        
   47080 | 2024-06-08 00:04:24 |         MASTER-SAAO | (01h 07m 38.65s , -32d 11m 10.0s) |   C |   180 | 19.8 |  Coadd 
   47099 | 2024-06-08 00:05:43 |         MASTER-SAAO | (01h 07m 35.45s , -32d 09m 43.5s) |   C |    60 | 19.5 |        
   47178 | 2024-06-08 00:07:02 |         MASTER-SAAO | (01h 07m 35.53s , -32d 11m 10.8s) |   C |    60 | 19.5 |        
   47258 | 2024-06-08 00:08:22 |         MASTER-SAAO | (01h 07m 39.61s , -32d 09m 40.1s) |   C |    60 | 19.4 |        
   47337 | 2024-06-08 00:09:41 |         MASTER-SAAO | (01h 07m 32.15s , -32d 10m 18.7s) |   C |    60 | 19.5 |        
   47416 | 2024-06-08 00:11:00 |         MASTER-SAAO | (01h 07m 32.44s , -32d 09m 19.0s) |   C |    60 | 19.5 |

Filter C is a clear (unfiltred) band.
The observation and reduction will continue. The message may be cited.

GCN Circular #36650
A.S. Kozyrev, D.V. Golovin, M.L. Litvak, I.G. Mitrofanov, and A.B. Sanin on behalf of the HEND/Mars Odyssey team,
D. Svinkin, D. Frederiks, A. Ridnaia, A. Lysenko, and T. Cline on behalf of the Konus-Wind team,
A. Goldstein, M. S. Briggs, C. Wilson-Hodge, and E. Burns on behalf of the Fermi GBM team,
E. Bozzo and C. Ferrigno, on behalf of the INTEGRAL SPI-ACS GRB team,
S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team,
G. Waratkar, V. Jethwani, J.Joshi, V. Bhalerao, D. Bhattacharya, and S. Vadawale, on behalf of the Astrosat-CZTI 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 very bright, long-duration GRB 240607A (Fermi-GBM detection: The Fermi GBM team, GCN 36634; Dalessi, GCN 36637; Dalessi and Meegan, GCN 36641; BALROG localization: Preis et al., GCN 36635; AstroSat-CZTI detection detection: Waratkar et al., GCN 36638) was detected by Fermi (GBM trigger 739450879), AstroSat (CZTI), Konus-Wind, INTEGRAL (SPI-ACS), Swift (BAT), and Mars-Odyssey (HEND) at about 39674 s UT (11:01:14). 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:
   17.830 (01h 11m 19s) -29.324 (-29d 19' 25")
 Corners:
   17.686 (01h 10m 45s) -29.329 (-29d 19' 45")
   18.025 (01h 12m 06s) -29.401 (-29d 24' 04")
   17.974 (01h 11m 54s) -29.317 (-29d 19' 03")
   17.634 (01h 10m 32s) -29.245 (-29d 14' 41")
 ---------------------------------------------
```
The error box area is 78 sq. arcmin, and its maximum dimension is 22 arcmin (the minimum one is 4.2 arcmin). The Sun distance was 76 deg.
The IPN localization is consistent with, but reduces the area of, the Fermi-GBM final and the BALROG localizations.
This localization may be improved.
A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB240607_T39674/IPN The HEALPix triangulation map is the multi-order HEALPix in units of probability density.
The Konus-Wind time history and spectrum will be given in a forthcoming GCN Circular.
GCN Circular #36659
A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin, A. Tsvetkova, M. Ulanov, and T. Cline, on behalf of the Konus-Wind team, report:
The very bright, long-duration GRB 240607A (Fermi-GBM detection: The Fermi GBM team, GCN 36634; Dalessi, GCN 36637; Dalessi and Meegan, GCN 36641; BALROG localization: Preis et al., GCN 36635; AstroSat-CZTI detection: Waratkar et al., GCN 36638; IPN triangulation: Kozyrev at al., GCN 36650) triggered Konus-Wind at T0=39674.62 s UT (11:01:14.620).
The burst light curve shows a multipeaked structure which starts at ~T0-0.2 s and has a total duration of ~24.7 s. The emission is seen up to ~6 MeV.
The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB240607_T39674/
As observed by Konus-Wind, the burst had a fluence of 1.03(-0.06,+0.05)x10^-4 erg/cm2, and a 64-ms peak flux, measured from T0+10.960 s, of 3.02(-0.33,+0.34)x10^-5 erg/cm2/s (both in the 20 keV - 10 MeV energy range).
The time-averaged spectrum of the burst (measured from T0 to T0+29.440 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.94(-0.05,+0.05), the high energy photon index beta = -2.92(-0.42,+0.22), the peak energy Ep = 248(-13,+13) keV (chi2 = 111/98 dof).
The spectrum near the maximum count rate (measured from T0+10.752 to T0+11.264 s) is best fit in the 20 keV - 10 MeV range by the GRB (Band) model with the following parameters: the low-energy photon index alpha = -0.21(-0.18,+0.19), the high energy photon index beta = -2.77(-0.37,+0.20), the peak energy Ep = 249(-24,+31) keV (chi2 = 54/46 dof).
All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.
GCN Circular #36661
Wen-Long Zhang, Shao-Lin Xiong and Wen-Jun Tan report on behalf of the GECAM team:
GECAM-C detected a long burst, GRB 240607A, at 2024-06-07T11:01:14.31 UTC (T0), which was also detected by Fermi/GBM (GCN #36634), AstroSat-CZTI (GCN #36638), Konus-Wind (GCN #36659) .
According to the GECAM-C light curve, this burst shows multiple pulses with a total duration of ~30 sec.
We note that these results are 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 December 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).

Back to JG's homepage

Jochen Greiner, last update: 11-Jun-2024 [Disclaimer]