GRB 231117A: Swift-XRT refined Analysis
Abstract
We have analysed 8.8 ks of XRT data for GRB 231117A, from 85 s to 223.3 ks after the BAT trigger. The data comprise 9 s in Windowed Timing (WT) mode (taken while Swift was slewing), with the remainder in Photon Counting (PC) mode. The light curve can be modelled with a power-law decay with a decay index of alpha=0.65 (+0.07, -0.06). A spectrum formed from the PC mode data can be fitted with an absorbed power-law with a photon spectral index of 1.81 (+0.17, -0.13). The best-fitting absorption column is consistent with the Galactic value of 6.1 x 10^20 cm^-2 (Willingale et al. 2013). The counts to observed (unabsorbed) 0.3-10 keV flux conversion factor deduced from this spectrum is 3.6 x 10^-11 (4.1 x 10^-11) erg cm^-2 count^-1. A summary of the PC-mode spectrum is thus: Total column: 6.1 (+/-3.8) x 10^20 cm^-2 Galactic foreground: 6.1 x 10^20 cm^-2 Excess significance: <1.6 sigma Photon index: 1.81 (+0.17, -0.13) The results of the XRT-team automatic analysis are available at http://www.swift.ac.uk/xrt_products/01197027. This circular is an official product of the Swift-XRT team.
- Publication:
-
GRB Coordinates Network
- Pub Date:
- November 2023
- Bibcode:
- 2023GCN.35128....1M