Swift Observations of GRB 210706A

A. Tohuvavohu (U. Toronto) for the Swift team

1. Introduction

Tohuvavohu et al. (GCN Circ. 30393) reported the GRB detection. Swift/BAT did not trigger on GRB 210706A (T0: 2021-07-06 08:17:49.9 UTC, Fermi/GBM trigger # 647252274). 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.

Figure 1. The BAT light curve is not available.

RA (J2000) Dec (J2000) Error Note Reference

20^h47^m58.70^s +13°19'01.3" 2.6" XRT-final UKSSDC

20^h47^m58.73^s +13°19'01.0" 3.2" XRT Tohuvavohu et al. GCN Circ. 30399

20^h48^m02.98^s +13°18'28.4" 5' BAT-GUANO Tohuvavohu et al. GCN Circ. 30393

Table 1. Positions from the Swift instruments.

Band Authors GCN Circ. Subject Observatory Notes

Optical Lipunov et al. 30394 Integral GRB210706.72: Global
MASTER-Net observations report MASTER

Optical Kumar et al. 30402 GIT optical upper limits GROWTH-India Tel. upper limits

Optical Pankov et al. 30404 optical upper limit of
Sintesz-Newton/CrAO and AS-32/AbAO Abastumani Astro. Obs. upper limits

Gamma-ray Ridnaia et al. 30403 Konus-Wind detection Konus-Wind E_peak=263 (-59,+112) keV
Duration=~8.9 seconds
Fluence=5.39(-0.66,+0.90)x10^-6erg cm^-2

Gamma-ray Bissaldi and Meegan 30405 Fermi GBM observation Fermi GBM E_peak=590±130 keV
T₉₀=7 seconds
Fluence=6.0±0.2x10^-6erg cm^-2
(62^nd percentile for long GRBs)

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

RA (J2000)	Dec (J2000)	Error	Note	Reference
20^h47^m58.70^s	+13°19'01.3"	2.6"	XRT-final	UKSSDC
20^h47^m58.73^s	+13°19'01.0"	3.2"	XRT	Tohuvavohu et al. GCN Circ. 30399
20^h48^m02.98^s	+13°18'28.4"	5'	BAT-GUANO	Tohuvavohu et al. GCN Circ. 30393

Band	Authors	GCN Circ.	Subject	Observatory	Notes
Optical	Lipunov et al.	30394	Integral GRB210706.72: Global MASTER-Net observations report	MASTER
Optical	Kumar et al.	30402	GIT optical upper limits	GROWTH-India Tel.	upper limits
Optical	Pankov et al.	30404	optical upper limit of Sintesz-Newton/CrAO and AS-32/AbAO	Abastumani Astro. Obs.	upper limits
Gamma-ray	Ridnaia et al.	30403	Konus-Wind detection	Konus-Wind	E_peak=263 (-59,+112) keV Duration=~8.9 seconds Fluence=5.39(-0.66,+0.90)x10^-6erg cm^-2
Gamma-ray	Bissaldi and Meegan	30405	Fermi GBM observation	Fermi GBM	E_peak=590±130 keV T₉₀=7 seconds Fluence=6.0±0.2x10^-6erg cm^-2 (62^nd percentile for long GRBs)

July 12, 2021