Swift Observations of GRB 220606B

1. Introduction

Tohuvavohu et al. (GCN Circ. 32167) reported the GRB detection. Swift/BAT did not localize GRB 220606B onboard (T0: 2022-06-06T01:03:28 UTC, Fermi/GBM GCN Circ. 32165). 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

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.

RA (J2000) Dec (J2000) Error Note Reference

01^h53^m53.76^s -54°28'15.6" 5' BAT-GUANO Tohuvavohu et al. GCN Circ. 32167

Table 1. Positions from the Swift instruments.

Band Authors GCN Circ. Subject Observatory Notes

Optical Lipunov et al. 32166 Fermi GRB 220606B: Global MASTER-Net
observations report MASTER

Optical O'Connor et al. 32177 Gemini South Optical Observations Gemini

Gamma-ray Fermi 32165 Fermi GBM Final Real-time Localization Fermi GBM

Gamma-ray Hristov and Meegan 32174 Fermi GBM Observation Fermi GBM T₉₀=0.9 seconds
Fluence=2.9±0.4x10^-7erg cm^-2
(brighter than 44% of short GRBs)

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

RA (J2000)	Dec (J2000)	Error	Note	Reference
01^h53^m53.76^s	-54°28'15.6"	5'	BAT-GUANO	Tohuvavohu et al. GCN Circ. 32167

Band	Authors	GCN Circ.	Subject	Observatory	Notes
Optical	Lipunov et al.	32166	Fermi GRB 220606B: Global MASTER-Net observations report	MASTER
Optical	O'Connor et al.	32177	Gemini South Optical Observations	Gemini
Gamma-ray	Fermi	32165	Fermi GBM Final Real-time Localization	Fermi GBM
Gamma-ray	Hristov and Meegan	32174	Fermi GBM Observation	Fermi GBM	T₉₀=0.9 seconds Fluence=2.9±0.4x10^-7erg cm^-2 (brighter than 44% of short GRBs)

June 8, 2022