//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30467 SUBJECT: Konus-Wind detection of GRB 210714A DATE: 21/07/18 14:11:31 GMT FROM: Dmitry Frederiks at Ioffe Institute D. Frederiks, S. Golenetskii, A.Lysenko, A. Ridnaia, D. Svinkin, A. Tsvetkova, M. Ulanov, and T. Cline, on behalf of the Konus-Wind team, report: GRB 210714A (Fermi-GBM trigger 647942198 / MASTER optical afterglow detection: Lipunov et al., GCN 30466) triggered Konus-Wind (KW) at T0=28598.602 s UT (07:56:38.602). The burst light curve shows a bright, FRED-like pulse which starts at ~T0-2.5 s, and has a total duration of ~80 s. The emission is seen up to ~15 MeV. The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB210714_T28598/ As observed by Konus-Wind, the burst had a fluence of (9.6 ± 0.8)x10^-5 erg/cm^2 and a 64-ms peak energy flux, measured from T0 + 1.664 s, of (1.07 ± 0.10)x10^-5 erg/cm^2/s (both in the 20 keV - 10 MeV energy range). The time-integrated spectrum (measured from T0 to T0+46.848 s) is best fit in the 20 keV - 15 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = -1.25 (-0.20,+0.49), the high energy photon index beta = -1.83 (-0.06,+0.05), the peak energy Ep = 145 (-60,+81) keV, chi2 = 101/97 dof. The spectrum near the peak count rate (measured from T0+0.256 to T0+5.888 s) is best fit in the 20 keV - 15 MeV range by the GRB (Band) function with the following model parameters: the low-energy photon index alpha = -1.01 (-0.30,+0.27), the high energy photon index beta = -1.91 (-0.05,+0.04), the peak energy Ep = 104 (-23,+39) keV, chi2 = 111/97 dof. All the quoted errors are estimated at the 90% confidence level. All the presented results are preliminary. //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 30539 SUBJECT: GRB 210714A: Fermi GBM observation DATE: 21/07/28 15:20:05 GMT FROM: Elisabetta Bissaldi at INFN,Bari E. Bissaldi (Politecnico and INFN Bari) reports on behalf of the Fermi GBM Team: "At 07:56:33.25 UT on 14 July 2021, the Fermi Gamma-Ray Burst Monitor (GBM) triggered and located GRB 210714A (trigger 647942198 / 210714331), which was also detected by Konus-Wind (Frederiks et al. 2021, GCN 30467). The on-ground calculated location, using the GBM trigger data, is RA = 313.67, DEC = -51.59 (J2000 degrees, equivalent to 20 h 54 m, -51 d 35'), with a statistical uncertainty of 1 degree (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 at the GBM trigger time is 109 degrees. The GBM light curve consists of a bright, FRED-like pulse with a duration (T90) of about 42 s (50-300 keV). The time-averaged spectrum from T0 to T0+25 s is best fit by a Band function with Epeak = 64 +/- 5 keV, alpha = -0.68 +/- 0.09, and beta = -1.75 +/- 0.01. The event fluence (10-1000 keV) in this time interval is (4.67 +/- 0.15)E-05 erg/cm^2. The 1-sec peak photon flux measured starting from T0+1.9 s in the 10-1000 keV band is 48.9 +/- 0.7 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/"