GRB 240629A
GCN Circular 36786
Subject
GRB 240629A: Fermi GBM Final Real-time Localization
Date
2024-06-29T17:05:07Z (a year ago)
From
Fermi GBM Team at MSFC/Fermi-GBM <do_not_reply@GIOC.nsstc.nasa.gov>
Via
email
The Fermi GBM team reports the detection of a likely LONG GRB
At 16:53:52 UT on 29 Jun 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240629A (trigger 741372837.729204 / 240629704).
The on-ground calculated location, using the Fermi GBM trigger data, is RA = 314.4, Dec = -35.7 (J2000 degrees, equivalent to J2000 20h 57m, -35d 42'), with a statistical uncertainty of 3.1 degrees.
The angle from the Fermi LAT boresight is 79.0 degrees.
The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240629704/quicklook/glg_skymap_all_bn240629704.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/bn240629704/quicklook/glg_healpix_all_bn240629704.fit
The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240629704/quicklook/glg_lc_medres34_bn240629704.gif
GCN Circular 36787
Subject
GRB 240629A: BALROG localization (Fermi Trigger 741372837 / GRB 240629704)
Date
2024-06-29T17:19:34Z (a year ago)
From
Jochen Greiner at MPE <jcgrog@mpe.mpg.de>
Via
email
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
741372837 at 16:53:52 on 29 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) = 317.4 deg
Decl.(2000.0) = -47.8 deg
The 1 sigma statistical error radius is 3.5 deg.
We estimate an additional systematic error of 1 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB240629704/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB240629704/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB240629704/json
GCN Circular 36790
Subject
Fermi GRB 240629A: Global MASTER-Net observations report
Date
2024-06-29T18:45:51Z (a year ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
Via
legacy email
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 240629A ( Fermi GBM team, GCN 36786) errorbox 3278 sec after notice time and 3311 sec after trigger time at 2024-06-29 17:49:04 UT, with upper limit up to 15.4 mag. The observations began at zenith distance = 80 deg. The sun altitude is -25.7 deg.
The galactic latitude b = -41 deg., longitude l = 4 deg.
Real time updated cover map and OT discovered available here:
https://master.sai.msu.ru/site/master2/observ.php?id=2512867
We obtain a following upper limits.
Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________
3342 | 2024-06-29 17:49:04 | MASTER-SAAO | (20h 42m 14.15s , -40d 38m 12.5s) | C | 60 | 15.4 |
4274 | 2024-06-29 18:04:36 | MASTER-SAAO | (20h 42m 16.65s , -40d 39m 00.0s) | C | 60 | 14.7 |
4512 | 2024-06-29 18:08:35 | MASTER-SAAO | (20h 43m 44.62s , -36d 52m 01.5s) | C | 60 | 12.7 |
4751 | 2024-06-29 18:12:33 | MASTER-SAAO | (20h 37m 14.45s , -38d 45m 36.9s) | C | 60 | 15.0 |
4910 | 2024-06-29 18:15:12 | MASTER-SAAO | (20h 51m 47.88s , -40d 38m 24.9s) | C | 60 | 14.1 |
5227 | 2024-06-29 18:20:30 | MASTER-SAAO | (20h 42m 13.74s , -40d 38m 12.0s) | C | 60 | 12.8 |
5782 | 2024-06-29 18:29:44 | MASTER-SAAO | (20h 37m 14.76s , -38d 45m 58.6s) | C | 60 | 12.1 |
Filter C is a clear (unfiltred) band.
The observation and reduction will continue.
The message may be cited.
GCN Circular 37340
Subject
GRB 240629A: First GRB Detected by BurstCube
Date
2024-08-29T17:00:16Z (10 months ago)
From
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov>
Via
Web form
I. Martinez-Castellanos (GSFC/UMD/CRESST), A. Myers (GSFC/ORAU), D. Violette (GSFC/ORAU), L. Angellini (GSFC), J. Asercion (GSFC/ADNET), M. S. Briggs (UAH), R. Caputo (GSFC), J. Cox (GSFC), G. de Nolfo (GSFC), K. Gasaway (GSFC), S. Griffin (UWM), D. Hartmann (Clemson), B. A. Hristov (UAH), A. Joens (Berkeley), P. Nuessle (GSFC/GWU), J. S. Perkins (GSFC), J. Racusin (GSFC), S. Semper (GSFC), P. Shawhan (UMD), J. Smith (UAH), L. Tian (GSFC) on behalf of the BurstCube Team:
At approximately 16:53 UTC on 29 June 2024, BurstCube detected GRB 240629A, also seen by Fermi-GBM (GCN 36786) and SVOM (GCN 36805). The spacecraft reported time was 16:53:28 UTC, with an approximate offset of -25 s from the GBM trigger time, which we attribute to BurstCube’s onboard clock uncertainty at the time of this data collection.
This is the first GRB detected by BurstCube in a ground analysis of downlinked commissioning data.
We analyzed our continuous binned data (16 energy channels, 256 ms time resolution) in the energy band of ~130-1000 keV, seeing a signal (total Test Statistic of 160.87) in excess of background in a 4.096 s window search in 3 detectors (Cs0, Cs1, Cs3). The 4 detector significances are 6.85, 9.61, 2.01, 4.19 sigma above background for Cs0, Cs1, Cs2, Cs3, respectively.
The duration is T90 = 7.2 [-1.0, +1.8] seconds, with a single-pulse light curve consistent with that seen by Fermi-GBM. Localization and spectral analysis are ongoing.
The BurstCube team continues to search our data for astronomical transients seen in at least two detectors, including independent events and those seen by other instruments.
BurstCube is a 6U CubeSat built, managed, and operated by NASA Goddard Space Flight Center and funded by NASA/APRA. The BurstCube instrument is comprised of 4 CsI(Tl) scintillator detectors read out by arrays of SiPMs. It was launched on March 21, 2024 on the NASA CRS-30 to the ISS, and deployed on April 18, 2024.