Konus-Wind detection of GRB 220211A
Abstract
The short-duration GRB 220211A (Fermi-GBM detection: The Fermi GBM team, GCN Circ. 31570; Veres and Meegan GCN Circ. 31591; Swift/BAT-GUANO detection: Tohuvavohu et al., GCN Circ. 31582; IPN triangulation: Ridnaia et al., GCN Circ. 31584) triggered Konus-Wind (KW) at T0=4070.727 s UT (01:07:50.727). The burst light curve shows a single pulse with the total duration of ~54 ms (20-1500 keV). The Konus-Wind light curve of this GRB is available at http://www.ioffe.ru/LEA/GRBs/GRB220211_T04070/ As observed by Konus-Wind, the burst had a fluence of 3.86(-0.53,+0.82)x10^-7 erg/cm^2 and a 16-ms peak energy flux, measured from T0-0.040 s, of 9.6(-2.1,+2.6)x10^-6 erg/cm^2/s (both in the 20 keV - 10 MeV energy range). Since the main fraction of the burst emission was detected before the trigger, the spectral analysis was performed using the KW 3-channel light curve data. Modelling the time-integrated spectrum of the burst (measured from T0-0.050 s to T0+0.004 s) by a power law with exponential cutoff model: dN/dE ~ (E^alpha)*exp(-E*(2+alpha)/Ep), yields alpha = 0.77(-0.62,+1.32) and Ep = 413(-74,+88) keV. All the quoted errors are estimated at the 68% confidence level. All the presented results are preliminary.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- February 2022
- Bibcode:
- 2022GCN.31599....1S