GRB240101C

This page lists all entries on GRB240101C in GRBweb

Summary Fermi GBM GCN 35451 GCN 35459 GCN 35478 GCN 35482 GCN 35488 GCN 35489 GCN 35508

Summary table
Variable Value Source
GRB_name_Fermi GRB240101540
T0 12:57:23.329 UTC GCN_circulars,Konus-Wind Det
ra 358.4870° GCN_circulars,IPN Triangulation
decl 28.7430° GCN_circulars,IPN Triangulation
T90 0.352 s Fermi_GBM
T90_error 0.091 s Fermi_GBM
T90_start 12:57:23.696 UTC Fermi_GBM
fluence 1.44e-05 erg/cm² Fermi_GBM
fluence_error 2.81e-07 erg/cm² Fermi_GBM
T100 0.719 s
GBM_located False
mjd 60310.539853344904 GCN_circulars,Konus-Wind Det
Fermi GBM table
GRB_name_Fermi GRB240101540
trigger_name bn240101540
ra 4.7300°
decl 30.4600°
datum 2024-01-01
t_trigger 12:57:23.760 UTC
T90 0.352 s
T90_error 0.091 s
T90_start 12:57:23.696 UTC
fluence 1.44e-05 erg/cm²
fluence_error 2.81e-07 erg/cm²
flux_1024 1.18e+02 erg/cm²/s
flux_1024_error 1.36e+01 erg/cm²/s
flux_1024_time -5.76e-01 erg/cm²/s
flux_64 4.61e+02 erg/cm²/s
flux_64_error 7.74e+01 erg/cm²/s
GCN 35451 table
GRB_name GRB240101C
GCN_number 35451
Detection_method Fermi GBM Other
ra 4.7300°
decl 30.4600°
Circular_text TITLE: GCN CIRCULAR NUMBER: 35451 SUBJECT: GRB 240101C: Fermi GBM Final Localization DATE: 24/01/02 03:31:02 GMT FROM: Bagrat Mailyan at Florida Tech The Fermi GBM team reports the detection of a likely SHORT GRB "At 12:57:23.76 UT on 01 January 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240101C (trigger 725806648/240101540). The on-ground calculated location, using the Fermi GBM trigger data, is RA = 4.73, Dec = 30.46 (J2000 degrees, equivalent to J2000 0h 18m, +30d 27'), with a statistical uncertainty of 3.33 degrees. The angle from the Fermi LAT boresight is 69 degrees. The skymap can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240101540/quicklook/glg_skymap_all_bn240101540.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/bn240101540/quicklook/glg_healpix_all_bn240101540.fit The GBM light curve can be found here: https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2024/bn240101540/quicklook/glg_lc_medres34_bn240101540.gif"
GCN 35459 table
GRB_name GRB240101C
GCN_number 35459
Detection_method Fermi GBM Det
Circular_text TITLE: GCN CIRCULAR NUMBER: 35459 SUBJECT: GRB 240101C: GRBAlpha detection DATE: 24/01/02 15:28:27 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, H. Takahashi (Hiroshima U.), L. Meszaros, B. Csak (Konkoly Observatory), N. Husarikova, F. Munz , M. Topinka, M. Kolar, 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 short-duration GRB 240101C (Fermi/GBM detection: GCN 35451; INTEGRAL/SPI-ACS peak detection at 2024-01-01 ~12:57:24 UT) was observed by the GRBAlpha 1U CubeSat (Pal et al. 2023, A&A, 677, 40; arXiv:2302.10048). The detection was confirmed at the peak time 2024-01-01 12:57:24 UTC. The T90 duration measured by GRBAlpha is 1 s and the overall significance during T90 reaches 4.9 sigma in the 120-400 keV band. The light curve obtained by GRBAlpha is available here: https://grbalpha.konkoly.hu/static/share/GRB240101C_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 35478 table
GRB_name GRB240101C
GCN_number 35478
Detection_method AstroSat CZTI
Circular_text TITLE: GCN CIRCULAR NUMBER: 35478 SUBJECT: GRB 240101C: AstroSat CZTI detection DATE: 24/01/04 04:38:33 GMT FROM: Gaurav Waratkar at IIT Bombay P. K. Navaneeth (IUCAA), G. Waratkar (IITB), 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 a short-duration GRB 240101C which was also detected by Fermi-GBM (Fermi GBM team, GCN Circ. 35451), and GRBAlpha (Dafcikova et al., GCN Circ. 35459). The source was detected in the CZT detectors in the 20-200 keV energy range. The light curve peaks at 2024-01-01 12:57:23.80 UTC. The measured peak count rate associated with the burst is 881 (+732, -43) counts/s above the background in the combined data of all quadrants, with a total of 69 (+31, -22) counts. The local mean background count rate was 331 (+13, -43) counts/s. Using cumulative rates, we measure a T90 of 0.13 (+0.06, -0.04) s. 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 35482 table
GRB_name GRB240101C
GCN_number 35482
Detection_method Swift Other
Circular_text TITLE: GCN CIRCULAR NUMBER: 35482 SUBJECT: GRB 240101C: Swift/BAT-GUANO detection of a short burst DATE: 24/01/05 02:17:35 GMT FROM: Jimmy DeLaunay at Penn State James DeLaunay (PSU), Gayathri Raman (PSU), Samuele Ronchini (PSU), Aaron Tohuvavohu (U Toronto), Jamie A. Kennea (PSU), Tyler Parsotan (NASA GSFC) report: Swift/BAT did not localize GRB 240101C onboard (T0: 2024-01-01T12:57:23.76 UTC, Fermi GBM Trig 725806648, GRBAlpha GCN 35459, AstroSat CZTI GCN 35478). The Fermi notice, distributed in near real-time, triggered the Swift Mission Operations Center operated Gamma-ray Urgent Archiver for Novel Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1). Upon trigger by this notice, GUANO sent a command to the Swift Burst Alert Telescope (BAT) to save 200 seconds of BAT event-mode data from [-50,+150] seconds around the time of the burst. All the requested event mode data was delivered to the ground. The BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu 2022, ApJ, 941, 169), performed on the temporal window [T0-20 s, T0+20 s], detects the burst with a sqrt(TS) of 11.2 in a 0.128 s analysis time bin, starting at T0 s. NITRATES results, independently, are ambiguous with respect to whether this burst originates from in or outside the BAT coded FOV, with a DeltaLLHOut of 4.2. See Section 9.1 and Figures 10 and 17 in the NITRATES paper for brief descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and DeltaLLHOut. GUANO is a fully autonomous, extremely low latency, spacecraft commanding pipeline designed for targeted recovery of BAT event mode data around the times of compelling astrophysical events to enable more sensitive GRB searches. A live reporting of Swift/BAT event data recovered by GUANO can be found at: https://www.swift.psu.edu/guano/
GCN 35488 table
GRB_name GRB240101C
GCN_number 35488
Detection_method Fermi GBM Det
t_trigger 12:57:23.760 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 35488 SUBJECT: GRB GRB240101C: Fermi GBM observation DATE: 24/01/05 18:41:54 GMT FROM: sumanbala2210@gmail.com S. Bala (USRA), B. Mailyan (Florida Tech) and C. Meegan (UAH) report on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 12:57:23.76 UT on 01 January 2024, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 240101C (trigger 725806648/240101540), which was also detected by the Swift/BAT-GUANO (J. DeLaunay et. al. 2023, GCN 35482), GRBAlpha (Dafcikova et al. GCN Circ. 35459) and AstroSat CZTI (Navaneeth et al. GCN 35478). The Fermi GBM on-ground calculated location, using the Fermi GBM trigger data has been reported at GCN 35451. The angle from the Fermi LAT boresight at the GBM trigger time is 69.0 degrees. The GBM light curve consists of one very short peak with a duration (T90) of about 0.35 s (50-300 keV). The time-averaged spectrum from T0-0.064 s to T0+0.256 s is best fit by a Comptonized Epeak function with Epeak = 286.4 +/- 21.8 keV, and alpha = 0.10 +/- 0.14. The event fluence (10-1000 keV) in this time interval is (1.19 +/- 0.07)E-6 erg/cm^2. The 64-msec peak photon flux measured starting from T0 in the 10-1000 keV band is 460.9 +/- 77.4 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak= 242.7 +/- 28.8 keV, alpha = 0.30 +/- 0.20 and beta = -2.50 +/- 0.39. 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 35489 table
GRB_name GRB240101C
GCN_number 35489
Detection_method IPN Triangulation
t_trigger 12:57:24 UTC
ra 358.4870°
decl 28.7430°
Circular_text TITLE: GCN CIRCULAR NUMBER: 35489 SUBJECT: IPN triangulation of GRB 240101C (short) DATE: 24/01/05 19:17:11 GMT FROM: Dmitry Svinkin at Ioffe Institute 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, and S. Barthelmy, J. Cummings, H. Krimm, D. Palmer, and A. Tohuvavohu on behalf of the Swift-BAT team, report: The short-duration GRB 240101C (Fermi-GBM detection: The Fermi GBM team, GCN 35451; Bala et al., GCN 35488; GRBAlpha detection: Dafcikova et al., GCN 35459; AstroSat-CZTI detection: Navaneeth et al., GCN 35478; Swift-BAT/GUANO detection: DeLaunay et al., GCN 35482) has been detected by Fermi (GBM trigger 725806648), Swift (BAT), GRBAlpha, Konus-Wind, INTEGRAL (SPI-ACS), and AstroSat (CZTI), so far, at about 46644 s UT (12:57:24). 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: 358.487 (23h 53m 57s) +28.743 (+28d 44' 36") Corners: 0.797 (00h 03m 11s) +24.032 (+24d 01' 56") 1.127 (00h 04m 30s) +23.926 (+23d 55' 33") 355.725 (23h 42m 54s) +33.705 (+33d 42' 18") 355.318 (23h 41m 16s) +33.852 (+33d 51' 06") --------------------------------------------- The error box area is 2.5 sq. deg and its maximum dimension is 11.15 deg (the minimum one is 14 arcmin). The Sun distance was 90 deg. This localization may be improved. The IPN localization is consistent with, but reduces the area of, the Fermi-GBM localizations. A triangulation map and HEALPix FITS file are posted at http://www.ioffe.ru/LEA/GRBs/GRB240101_T46643/IPN/
GCN 35508 table
GRB_name GRB240101C
GCN_number 35508
Detection_method Konus-Wind Det
t_trigger 12:57:23.329 UTC
Circular_text TITLE: GCN CIRCULAR NUMBER: 35508 SUBJECT: Konus-Wind detection of GRB 240101C DATE: 24/01/09 15:07:11 GMT FROM: Anna Ridnaia at Ioffe Institute A. Ridnaia, D. Frederiks, A. Lysenko, D. Svinkin, A. Tsvetkova, M. Ulanov, and T. Cline, on behalf of the Konus-Wind team, report: The short-duration GRB 240101C (Fermi-GBM detection: The Fermi GBM team, GCN 35451; Bala et al., GCN 35488; GRBAlpha detection: Dafcikova et al., GCN 35459; AstroSat-CZTI detection: Navaneeth et al., GCN 35478; Swift-BAT/GUANO detection: DeLaunay et al., GCN 35482; IPN triangulation: Svinkin et al., GCN 35489) triggered Konus-Wind at T0=46643.329 s UT (12:57:23.329). The burst light curve shows a single pulse which starts at ~T0-0.1 s and has a total duration of ~0.3 s. The emission is seen up to ~4 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB240101_T46643/ As observed by Konus-Wind, the burst had a fluence of 1.39(-0.19,+0.21)x10^-6 erg/cm2, and a 16-ms peak flux, measured from T0-0.002 s, of 1.57(-0.41,+0.43)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+0.256 s) is best fit in the 20 keV - 10 MeV range by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep) with alpha = -0.19(-0.41,+0.52) and Ep = 326(-56,+80) keV (chi2 = 15/22 dof). Fitting by a GRB (Band) model yields the same alpha and Ep, and an upper limit on the high energy photon index: beta < -2.4 (chi2 = 15/21 dof). All the quoted errors are at the 90% confidence level. All the quoted values are preliminary.