GRB230626A
| Summary table | ||
|---|---|---|
| Variable | Value | Source |
| GRB_name_Fermi | GRB230626604 | |
| T0 | 14:30:22.246 UTC | Fermi_GBM |
| ra | 146.3800° | Fermi_GBM |
| decl | 0.0900° | Fermi_GBM |
| pos_error | 4.43e+00° | Fermi_GBM |
| T90 | 15.36 s | Fermi_GBM |
| T90_error | 0.362 s | Fermi_GBM |
| T90_start | 14:30:24.038 UTC | Fermi_GBM |
| fluence | 2.28e-05 erg/cm² | Fermi_GBM |
| fluence_error | 1.57e-08 erg/cm² | Fermi_GBM |
| T100 | 17.152 s | |
| GBM_located | True | |
| mjd | 60121.604424143516 | Fermi_GBM |
| Fermi GBM table | ||
|---|---|---|
| GRB_name_Fermi | GRB230626604 | |
| trigger_name | bn230626604 | |
| ra | 146.3800° | |
| decl | 0.0900° | |
| pos_error | 4.43e+00° | |
| datum | 2023-06-26 | |
| t_trigger | 14:30:22.246 UTC | |
| T90 | 15.36 s | |
| T90_error | 0.362 s | |
| T90_start | 14:30:24.038 UTC | |
| fluence | 2.28e-05 erg/cm² | |
| fluence_error | 1.57e-08 erg/cm² | |
| flux_1024 | 3.50e+01 erg/cm²/s | |
| flux_1024_error | 4.65e-01 erg/cm²/s | |
| flux_1024_time | 1.10e+01 erg/cm²/s | |
| flux_64 | 4.86e+01 erg/cm²/s | |
| flux_64_error | 1.97e+00 erg/cm²/s | |
| GCN 34094 table | ||
|---|---|---|
| GRB_name | GRB230626A | |
| GCN_number | 34094 | |
| Detection_method | Fermi GBM Det | |
| t_trigger | 14:30:22.250 UTC | |
| ra | 146.3800° | |
| decl | 0.0900° | |
| Circular_text | TITLE: GCN CIRCULAR NUMBER: 34094 SUBJECT: GRB230626A: Fermi GBM Detection DATE: 23/06/27 16:55:13 GMT FROM: sumanbala2210@gmail.com S. Bala (USRA) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 14:30:22.25 UT on 26 June 2023, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB230626A (trigger 709482627/230626604). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 146.38, Dec = 0.09 (J2000 degrees, equivalent to J2000 09h 45m, +00d 05'), 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 49 degrees. The GBM light curve consists of two peaks (the second peak is found to be much brighter) with a duration (T90) of about 15 s (50-300 keV). The time-averaged spectrum from T0-1.024 to T0+25.60 s is best fit by a Band function with Epeak= 169 +/- 12 keV, alpha = -1.29 +/- 0.02 and beta = -2.16 +/- 0.08. The event fluence (10-1000 keV) in this time interval is (2.55 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+11 s in the 10-1000 keV band is 35 +/- 0.5 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 34099 table | ||
|---|---|---|
| GRB_name | GRB230626A | |
| GCN_number | 34099 | |
| Detection_method | Fermi GBM Det | |
| t_trigger | 14:30:27.440 UTC | |
| Circular_text | TITLE: GCN CIRCULAR NUMBER: 34099 SUBJECT: GRB 230626A: GRBAlpha detection DATE: 23/06/27 21:47:24 GMT FROM: Marianna DafÄÃková at Masaryk University <500025@mail.muni.cz> M. Dafcikova, J. Ripa (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. Kolar, 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.), yyT. 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 230626A (Fermi/GBM detection: GCN 34094; GECAM-B detection: trigger no. 198; Konus/Wind detection at 2023-06-26 14:30:27.440 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023; arXiv:2302.10048). The detection was confirmed at the peak time 2023-06-26 14:30:29 UTC. The T90 duration measured by GRBAlpha is 14 s and the overall significance during T90 reaches 19 sigma. The light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB230626A_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 34143 table | ||
|---|---|---|
| GRB_name | GRB230626A | |
| GCN_number | 34143 | |
| Detection_method | Fermi GBM Det | |
| t_trigger | 14:30:27.440 UTC | |
| Circular_text | TITLE: GCN CIRCULAR NUMBER: 34143 SUBJECT: GRB 230626A: VZLUSAT-2 detection DATE: 23/07/04 16:50:13 GMT FROM: Marianna DafÄÃková 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 230626A (Fermi/GBM detection: GCN 34094; GRBAlpha detection: GCN 34099; GECAM-B detection: trigger no. 198; Konus/Wind detection at 2023-06-26 14:30:27.440 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 2023-06-26 14:30:32 UTC. The T90 duration measured by VZLUSAT-2 is 13 s and the significance during T90 reaches 19 sigma. The light curve obtained by VZLUSAT-2 is available here: https://vzlusat2.konkoly.hu/static/share/GRB230626A_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. | |