Swift Observations of GRB 210802A

B. Sbarufatti (PSU) for the Swift team

1. Introduction

Longo et al. (GCN Circ. 30589) 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 Sbarufatti et al. (GCN Circ. 30591). While we cannot determine at the present time whether the source is fading, we note that a previous 1 ks Swift-XRT visit of the field showed no sign of Source 7 (https://www.swift.ac.uk/2SXPS/Fields/10000004351).

4. UVOT Observations and Analysis

UVOT results are not available.

Figure 1. The BAT light curve is not available.

XRT light curve

Figure 2. The XRT light curve. Any data from a crosshatched region are not included in the fit.

RA (J2000) Dec (J2000) Error Note Reference
15h22m53.48s +29°54'06.5" 3.5" XRT Sbarufatti et al. GCN Circ. 30591

Table 1. Positions from the Swift instruments.

Band Authors GCN Circ. Subject Observatory Notes
Optical Hu et al. 30592 BOOTES-2/TELMA optical upper limit BOOTES-2 upper limits
Optical Watson et al. 30593 DDOTI Upper Limits Deca-Degree Optical Imager upper limits
Optical Hosokawa et al. 30596 MITSuME Okayama optical upper limits MITSuME Okayama upper limits
Gamma-ray Longo et al. 30589 Fermi-LAT detection Fermi LAT Emax=1.4 GeV
Gamma-ray Roberts and Meegan 30590 Fermi GBM detection Fermi GBM Epeak=372±12 keV
T90=11 seconds
Fluence=2.10±0.03x10-5erg cm-2
(88th percentile for long GRBs)

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

August 5, 2021