Swift Observations of GRB 170710B

D.M. Palmer (LANL) and K.L. Page (U. Leicester) for the Swift team

1. Introduction

At 08:10:06.251 UT on 2017-07-10, the Swift Burst Alert Telescope (BAT) detected a GRB during a pre-planned slew to a scheduled target (Palmer and Lien GCN Circ. 21316). 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

Analysis of the UVOT data was reported by Page et al. (GCN Circ. 21318). The UVOT started observing this source 85.2 ks after the burst. The catalogued source just on the edge of the XRT region is detected, but no new source is found to an upper limit in the UVW2 filter of 21.3 mag in 3924s of exposure. Table 3 gives preliminary magnitudes using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc., 1358, 373).

Figure 1. The BAT light curve is not available.

RA (J2000)	Dec (J2000)	Error	Note	Reference
02h52m29.3s	+42°40'43.6"	1.0'	BAT-initial	Palmer and Lien GCN Circ. 21316

Table 1. Positions from the Swift instruments.

Band	Authors	GCN Circ.	Subject	Observatory	Notes
Radio	Mooley et al.	21461	15 GHz upper limits from AMI	AMI	upper limits
Gamma-ray	Hamburg et al.	21319	Fermi GBM observation	Fermi GBM	Epeak=293±61 keV T90=42 seconds Fluence=6.0±0.4x10-6erg cm-2 (62nd percentile for long GRBs)

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

Table 3. Found no UVOT observations.

August 12, 2017