Swift Observations of GRB 171124A

J.P. Osborne (U. Leicester) for the Swift team

1. Introduction

Longo et al. (GCN Circ. 22156) reported the GRB detection. At 05:37:56.50 UT on November 24, 2017, Fermi-LAT detected high-energy emission from GRB 171124A, which was also detected by Fermi-GBM (trigger 533194681 / 171124235). Table 1 contains the best reported positions from Swift.

Table 2 is a summary of GCN Circulars about this GRB from observatories other than Swift.

2. BAT Observations and Analysis

BAT did not observe this burst.

3. XRT Observations and Analysis

XRT refined results are not available.

4. UVOT Observations and Analysis

UVOT results are not available.

Figure 1. The BAT light curve is not available.

XRT light curve

Figure 2. The XRT light curve. Any data from a crosshatched region are not included in the fit.

RA (J2000) Dec (J2000) Error Note Reference
22h21m54.24s +35°19'55.7" 2.3" XRT-final UKSSDC
22h21m54.24s +35°19'55.7" 2.3" XRT Osborne et al. GCN Circ. 22174

Table 1. Positions from the Swift instruments.

Band Authors GCN Circ. Subject Observatory Notes
Optical Shiraishi et al. 22159 MITSuME Akeno optical upper limits MITSuME Akeno upper limits
Optical Mazaeva et al. 22175 TShAO optical observations Tien Shan Astro. Obs.
Gamma-ray Longo et al. 22156 Fermi-LAT detection Fermi LAT Emax=3.5 GeV
Gamma-ray Bissaldi and von Kienlin 22164 Fermi GBM observation Fermi GBM Epeak=1.12±0.28 keV
T90=26 seconds
Fluence=1.1±0.3x10-5erg cm-2
(77th percentile for long GRBs)
Gamma-ray Sharma et al. 22168 AstroSat CZTI detection CZTI T90=8.4 seconds
Gamma-ray Li et al. 22171 ： Insight-HXMT/HE detection Insight-HXMT T90=17.27 seconds
Gamma-ray Tezuka et al. 22210 CALET Gamma-Ray Burst Monitor detection CALET T90=17.8±0.5 seconds

Table 2. Summary of GCN Circulars from other observatories sorted by band and then circular number.

December 8, 2017