Swift Observations of GRB 140611A

P.A. Evans (U. Leicester) for the Swift team

1. Introduction

Golenetskii et al. (GCN Circ. 16384) reported the GRB detection. The short-duration, hard spectrum, bright GRB 140611A has been observed by Konus-Wind, Swift (BAT), MESSENGER (GRNS), and INTEGRAL (SPI-ACS), so far, at about 13864 s UT (03:51:04). 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

We have analysed 4.8 ks of XRT data for the IPN-detected burst: GRB 140611A, from 80.5 ks to 92.1 ks after the IPN trigger. The data are entirely in Photon Counting (PC) mode. An X-ray source is detected within the IPN error circle. 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.

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
23h19m40.15s -40°06'16.0" 5.5" XRT-final UKSSDC
23h19m40.15s -40°06'16.0" 5.5" XRT Evans et al. GCN Circ. 16390
23h19m45.4s -40°06'41" 4' BAT-ground Cummings GCN Circ. 16386

Table 1. Positions from the Swift instruments.

Band Authors GCN Circ. Subject Observatory Notes
Gamma-ray Golenetskii et al. 16384 IPN Triangulation of GRB 140611A
(short/hard)		 IPN
Gamma-ray Golenetskii et al. 16389 Konus-Wind observation Konus-Wind Epeak=1460 (-360,+520) keV
Fluence=1.5(-0.3,+0.4)x10-5erg cm-2
Other Cummings 16386 Detection of a source in BAT ground
analysis		 detection

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

May 22, 2015