GCN Circular 18849
Subject
LIGO/Virgo G211117: Swift observations of PS15dpn
Date
2016-01-09T17:52:48Z (9 years ago)
From
Phil Evans at U of Leicester <pae9@leicester.ac.uk>
P.A. Evans and K.L. Page (U. Leicester) report on behalf of the Swift team:
On 2016 Jan 7 at 15:54 Swift began observations of the transient PS15dpn
(Chambers et al., GCN 18811; Cenko et al., GCN 18848), collecting 4 ks
of data.
No X-ray emission was detected at the location of the source, with a
3-sigma upper limit of 2.4e-3 ct/sec, corresponding to a 0.3-10 keV flux
of 1.0e-13 erg/cm^2/s (assuming a power-law spectrum with photon index
1.7 and column density 3e20 cm^-2).
UVOT did detect PS15dpn in the uvm2 filter, at a mangitude of 19.09 �� 0.07.
A single uncatalogued X-ray source was found in our observations,
however this is below the RASS upper limit at its location, and likely
unrelated to the LIGO trigger. It has been assigned a rank of 3 under
our classification scheme described at http://www.swift.ac.uk/ranks.php.
Source 56:
=============
RA: 38.0971 ( = 02h 32m 23.30s) J2000
Dec: +18.5781 ( = +18d 34' 41.2") J2000
Error: +5.9 (arcsec, radius, 90% confidence).
Peak Rate: 2.9e-03 �� 1.1e-03 ct/sec (0.3-10 keV)
Peak Flux: 1.3e-13 �� 4.9e-14 erg cm^-2 s^-1 (0.3-10 keV)
RASS UL: 1.2e-01 ct/sec, 3-sigma, converted to XRT (0.3-10 keV)
so the source is not above the RASS 3-sigma upper limit.
There is no evidence for fading.
NOTE: this source is not within 200 kpc of a GWGC galaxy.
This circular is an official product of the Swift team.
[GCN OPS NOTE(10jan16): The event ID number in the Subject-line
was changed from 2111117 to 211117.]