Swift Observations of GRB 211018A

S. Dichiara (PSU) for the Swift team

1. Introduction

Arimoto et al. (GCN Circ. 30943) reported the GRB detection. 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

Analysis of the initial XRT data was reported by Dichiara et al. (GCN Circ. 31010). Five uncatalogued X-ray sources have been detected, however none of them is above the RASS limit or shows definitive signs of fading.

4. UVOT Observations and Analysis

UVOT results are not available.

Figure 1. The BAT light curve is not available.

RA (J2000)	Dec (J2000)	Error	Note	Reference

Table 1. Positions from the Swift instruments.

Band	Authors	GCN Circ.	Subject	Observatory	Notes
Gamma-ray	Arimoto et al.	30943	Fermi-LAT detection	Fermi LAT	Emax=3.3 GeV
Gamma-ray	Ohno et al.	30945	Detection by GRBAlpha	GRBAlpha
Gamma-ray	Roberts and Meegan	30947	Fermi GBM observation	Fermi GBM	Epeak=351.4±4.9 keV T90=123.9 seconds

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

October 27, 2021