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GCN Circular 15872

Subject
GRB 140219A: results from Swift XRT and UVOT tiled observations
Date
2014-02-21T17:19:26Z (10 years ago)
From
Vanessa Mangano at PSU <vxm22@psu.edu>
V. Mangano (PSU), P. A. Evans (U. Leicester), F. E. Marshall (NASA/GSFC)

report on behalf of the Swift Team:



Swift-XRT has observed the central part of the error region of the 

IPN GRB 140219A in a series of observations tiled on the sky. 

The total exposure time is 5.9 ks spread over 3 fields; 

the maximum exposure within the sky observed was 3.9 ks. 

The observations started 70.3 ks after the IPN trigger.

Within these data there are 2 objects which are not catalogued in

X-rays. At the present time we cannot be sure which, if either, 

of these is the afterglow.

Source details:



Source 1

RA:  156.49768    = 10h 25m 59.44s (J2000)

Dec:  7.52128  = +07d 31' 16.6" (J2000)

Err: 10.0 (radius, 90% confidence)

Exposure time: 2.2 ks

Online products:

http://www.swift.ac.uk/xrt_products/TILED_GRB00024/index_1.php



Source 2

RA:  156.44031    = 10h 25m 45.67s (J2000)

Dec:  7.96378  = +07d 57' 49.6" (J2000)

Err: 10.0 (radius, 90% confidence)

Exposure time: 1.5 ks

Online products:

http://www.swift.ac.uk/xrt_products/TILED_GRB00024/index_2.php





UVOT observed both of the XRT source regions.

In the region for XRT Source 1, UVOT finds a bright

optical source that we identify with the star

SDSS J102559.46+073114.1.

UVOT finds no optical counterpart to XRT Source 2

in a 803-second exposure with the white filter 

starting 82.3 ks after the trigger.

The preliminary 3-sigma upper limit 

using the UVOT photometric system 

(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373)

is 21.7 mag. No correction has been made

for Galactic extinction due to the reddening of

E(B-V) of 0.03 in the direction of the source

(Schlegel et al. 1998).



This circular is an official product of the Swift team.
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