Swift Observations of GRB 220506A

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

1. Introduction

Urabe et al. (GCN Circ. 32001) reported the GRB detection. The MAXI/GSC nova alert system triggered a bright uncatalogued X-ray transient source at 06:28:15 UT on 2022 May 6. 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 Osborne et al. (GCN Circ. 32006). We cannot determine at the present time whether the source is 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
15h58m54.18s	-26°25'06.9"	7.2"	XRT	Osborne et al. GCN Circ. 32006

Table 1. Positions from the Swift instruments.

Band	Authors	GCN Circ.	Subject	Observatory	Notes
Optical	Lipunov et al.	32000	MAXI GRB220506.27: Global MASTER-Net observations report	MASTER
Optical	Lipunov et al.	32002	Swift GRB220506.51: Global MASTER-Net observations report	MASTER
Optical	Hu et al.	32008	BOOTES-5/JGT optical upper limit	BOOTES	upper limits
Optical	Swain et al.	32012	GIT optical upper limit.	GROWTH-India Tel.	upper limits
Optical	Ito et al.	32014	MITSuME Akeno optical upper limits	MITSuME Akeno	upper limits
X-ray	Urabe et al.	32001	MAXI J1558-266: MAXI/GSC detection	MAXI	detection
Gamma-ray	Svinkin et al.	32057	Konus-Wind detection	Konus-Wind	Epeak=110 (-16,+70) keV Fluence=1.46(-0.10,+1.13)x10-6erg cm-2

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

May 18, 2022