GRB240425A

This page lists all entries on GRB240425A in GRBweb

Summary Fermi GBM GCN 36295 GCN 36350 GCN 36363

Summary table
Variable Value Source
GRB_name_Fermi GRB240425015
T0 0:21:14.965 UTC Fermi_GBM
ra 227.6700° Fermi_GBM
decl 46.6800° Fermi_GBM
pos_error 3.62e+00° Fermi_GBM
T90 37.377 s Fermi_GBM
T90_error 2.429 s Fermi_GBM
T90_start 0:21:14.965 UTC Fermi_GBM
fluence 5.81e-06 erg/cm² Fermi_GBM
fluence_error 3.98e-08 erg/cm² Fermi_GBM
T100 37.377 s
GBM_located True
mjd 60425.01475653935 Fermi_GBM
Fermi GBM table
GRB_name_Fermi GRB240425015
trigger_name bn240425015
ra 227.6700°
decl 46.6800°
pos_error 3.62e+00°
datum 2024-04-25
t_trigger 0:21:20.341 UTC
T90 37.377 s
T90_error 2.429 s
T90_start 0:21:14.965 UTC
fluence 5.81e-06 erg/cm²
fluence_error 3.98e-08 erg/cm²
flux_1024 5.09e+00 erg/cm²/s
flux_1024_error 3.31e-01 erg/cm²/s
flux_1024_time 1.63e+01 erg/cm²/s
flux_64 6.89e+00 erg/cm²/s
flux_64_error 1.50e+00 erg/cm²/s
GCN 36295 table
GRB_name GRB240425A
GCN_number 36295
Detection_method Fermi GBM final loc
t_trigger 0:21:20 UTC
ra 227.7000°
decl 46.7000°
Circular_text TITLE: GCN CIRCULAR NUMBER: 36295 SUBJECT: GRB 240425A: Fermi GBM Final Real-time Localization DATE: 24/04/25 00:33:16 GMT FROM: Fermi GBM Team at MSFC/Fermi-GBM The Fermi GBM team reports the detection of a likely LONG GRB At 00:21:20 UT on 25 Apr 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240425A (trigger 735697285.341006 / 240425015). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 227.7, Dec = 46.7 (J2000 degrees, equivalent to J2000 15h 10m, 46d 42'), with a statistical uncertainty of 3.6 degrees. The angle from the Fermi LAT boresight is 86.0 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240425015/quicklook/glg_skymap_all_bn240425015.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/bn240425015/quicklook/glg_healpix_all_bn240425015.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240425015/quicklook/glg_lc_medres34_bn240425015.gif
GCN 36350 table
GRB_name GRB240425A
GCN_number 36350
Detection_method Fermi GBM Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 36350 SUBJECT: GRB 240425A: GRBAlpha detection DATE: 24/04/29 20:23:19 GMT FROM: Marianna Dafčíková at Masaryk University <500025@mail.muni.cz> M. Dafcikova, J. Ripa, M. Kolar (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Duriskova, L. Szakszonova, J.-P. Breuer, F. Hroch (Masaryk U.), T. Urbanec, M. Kasal, A. Povalac (Brno U. of Technology), J. Hudec, J. Kapus, M. Frajt (Spacemanic s.r.o), R. Laszlo, M. Koleda (Needronix s.r.o), M. Smelko, P. Hanak, P. Lipovsky (Technical U. of Kosice), G. Galgoczi (Wigner Research Center/Eotvos U.), Y. Uchida, H. Poon, H. Matake (Hiroshima U.), N. Uchida (ISAS/JAXA), T. Bozoki (Eotvos U.), G. Dalya (Eotvos U.), T. Enoto (Kyoto U.), Zs. Frei (Eotvos U.), G. Friss (Eotvos U.), Y. Fukazawa, K. Hirose (Hiroshima U.), S. Hisadomi (Nagoya U.), Y. Ichinohe (Rikkyo U.), K. Kapas (Eotvos U.), L. L. Kiss (Konkoly Observatory), T. Mizuno (Hiroshima U.), K. Nakazawa (Nagoya U.), H. Odaka (Univ of Tokyo), J. Takatsy (Eotvos U.), K. Torigoe (Hiroshima U.), N. Kogiso, M. Yoneyama (Osaka Metropolitan U.), M. Moritaki (U. Tokyo), T. Kano (U. Michigan) -- the GRBAlpha collaboration. The long-duration GRB 240425A (Fermi/GBM detection: GCN 36295; INTEGRAL/SPI-ACS peak detection at 2024-04-25 ~00:21:36 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023, A&A, 677, 40; https://ui.adsabs.harvard.edu/abs/2023A%26A...677A..40P/abstract). The detection was confirmed at the peak time 2024-04-25 00:21:16.5 UTC. The T90 duration measured by GRBAlpha is 27.5 s and the overall significance during T90 reaches 7.9 sigma. The light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB240425A_GCN.pdf All GRBAlpha detections are listed at: https://monoceros.physics.muni.cz/hea/GRBAlpha/ GRBAlpha, launched on 2021 March 22, is a demonstration mission for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). The detector of GRBAlpha consists of a 75 x 75 x 5 mm3 CsI scintillator read out by a SiPM array, covering the energy range from ~50 keV to ~1000 keV. To increase the duty cycle and the downlink rate, the upgrade of the on-board data acquisition software stack is in progress. The ground segment is also supported by the radio amateur community and it takes advantage of the SatNOGS network for increased data downlink volume.
GCN 36363 table
GRB_name GRB240425A
GCN_number 36363
Detection_method Fermi GBM Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 36363 SUBJECT: GRB 240425A: VZLUSAT-2 detection DATE: 24/05/01 15:46:34 GMT FROM: Marianna Dafčíková at Masaryk University <500025@mail.muni.cz> M. Dafcikova, J. Ripa (Masaryk U.), A. Pal (Konkoly Observatory), N. Werner (Masaryk U.), M. Ohno (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), H. Takahashi (Hiroshima U.), F. Munz , M. Topinka, F. Hroch, N. Husarikova, J.-P. Breuer (Masaryk U.), J. Hudec, J. Kapus, M. Frajt, M. Rezenov (Spacemanic s.r.o), R. Laszlo (Needronix), G. Galgoczi (Wigner Research 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. Gromes (VZLU), I. Vertat (FEL ZCU) -- the VZLUSAT-2/GRB payload collaboration. The long-duration GRB 240425A (Fermi/GBM detection: GCN 36295; GRBAlpha detection: GCN 36350; INTEGRAL/SPI-ACS peak detection at 2024-04-25 ~00:21:36 UT) was detected by the GRB detector on board of the VZLUSAT-2 3U CubeSat (https://www.vzlusat2.cz/en/). The data acquisition was performed by the GRB detector unit no. 1. The detection was confirmed at the peak time 2024-04-25 00:21:35 UTC. The T90 duration is 30 s and the significance during T90 reaches 10 sigma. The light curve obtained by VZLUSAT-2 is available here: https://vzlusat2.konkoly.hu/static/share/GRB240425A_GCN_VZLUSAT2.pdf All VZLUSAT-2 detections are listed at: https://monoceros.physics.muni.cz/hea/VZLUSAT-2/ The GRB detectors on VZLUSAT-2 are a demonstration payload for a future CubeSat constellation (Werner et al. Proc. SPIE 2018). Two GRB modules of VZLUSAT-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.