Swift Observations of GRB 221206B

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

1. Introduction

DeLaunay et al. (GCN Circ. 33027) reported the GRB detection. Swift/BAT did not trigger on GRB 221206 (T0: 2022-12-06T12:22:47 UTC, Fermi/GBM GCN Circ. 33023). 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 refined results are not available.

3. XRT Observations and Analysis

Analysis of the initial XRT data was reported by Osborne et al. (GCN Circ. 33029).

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
16h44m37.13s	+42°40'17.0"	4'	BAT-GUANO	DeLaunay et al. GCN Circ. 33027

Table 1. Positions from the Swift instruments.

Band	Authors	GCN Circ.	Subject	Observatory	Notes
Gamma-ray	Fermi	33023	Fermi GBM Final Real-time Localization	Fermi GBM
Gamma-ray	Dafcikova et al.	33028	Detection by GRBAlpha	GRBAlpha
Gamma-ray	Malacaria and Meegan	33030	Fermi GBM observation	Fermi GBM	Epeak=151±6 keV T90=8 seconds Fluence=2.19±0.05x10-6erg cm-2 (brighter than 31% of long GRBs)

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

December 9, 2022