Swift Observations of GRB 171030A

V. D'Elia (SSDC) for the Swift team

1. Introduction

Kozlova et al. (GCN Circ. 22076) 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

XRT refined results are not available.

4. UVOT Observations and Analysis

The Swift/UVOT observed the field of GRB 171030A three times between 109 ks and 116 ks after the trigger for a total exposure of 1751 s (D'Elia et al. GCN Circ. 22078). All the exposures used the UVW2 filter. Table 3 gives preliminary magnitudes using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc., 1358, 373). No correction has been made for the expected extinction in the Milky Way corresponding to a reddening of EB-V of 0.22 mag. in the direction of the GRB (Schlegel et al. 1998).

Figure 1. The BAT light curve is not available.

RA (J2000) Dec (J2000) Error Note Reference
04h34m41.0s -15°25'19.2" 3' XRT D'Elia et al. GCN Circ. 22078

Table 1. Positions from the Swift instruments.

Band Authors GCN Circ. Subject Observatory Notes
Optical Lipunov et al. 22102 MASTER inspection of the IPN error box
of the short GRB.		 MASTER
Optical Department et al. 22108 MASTER OT J034412.48-263556.5
featureless continuum spectrum from
Lijiang 2.4m (China) telescope and 2m
the Himalayan Chandra		 MASTER
Gamma-ray Kozlova et al. 22076 IPN Triangulation of GRB 171030A
(short)		 IPN
Gamma-ray Hamburg and Meegan 22079 Fermi GBM detection Fermi GBM T90=0.1 seconds
Fluence=1.7±0.2x10-7erg cm-2
(23rd percentile for short GRBs)
Gamma-ray Lipunov et al. 22080 IPN error box through NSs probability
merging rate map		 IPN

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

Table 3. Found no UVOT observations.

November 9, 2017