[vsnet-grb-info 25879] Swift/UVOT Observations of IceCube 200615A

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  27979
SUBJECT: Swift/UVOT Observations of IceCube 200615A
DATE:    20/06/18 12:15:15 GMT
FROM:    Frank Marshall at Swift/UVOT  <marshall at milkyway.gsfc.nasa.gov>

F.E. Marshall (GSFC), P.A. Evans (U. Leicester), T. Gregoire (PSU), J.A. Kennea (PSU),

H. A. Ayala Solares (PSU), D.F. Cowen (PSU), J. DeLaunay (PSU) , D. B. Fox (PSU),

A. Keivani (Columbia U.), F. Krauss (PSU), and J.P. Osborne (U. Leicester) report:



Swift observed the field of IceCube 200615A (GCN Circ. 27950) between 08:58:51 UT

2020 June 15 and 11:12:28 UT on 2020 June 16. The observations used

7 pointing directions to tile the inner part of the 90% confidence

region for the neutrino event. The results of the XRT observations

were reported by Evans et al. (GCN Circ. 27973).



UVOT observed the 7 tiling directions using the U filter

covering a total of ~0.57 deg**2. The UVOT field-of-view is co-aligned

with the XRT's but is smaller than the XRT's.

We analyzed the longest exposure for each direction,

which ranged from 337 s to 363 s. The averge exposure was 348 s.

No uncatalogued point sources were found with a

typical sensitivity limit of 19.0 mag.



We also searched for counterparts to the XRT sources reported by

Evans et al. (GCN Circ. 27973).

Sources 1, 3, 4, and 6 were detected with UVOT and are

also in the Digital Sky Survey.

Source 2 was not detected with UVOT.

Source 9 is near a bright galaxy, which was detected with UVOT.

Sources 5, 7, and 8 are outside the field-of-view of UVOT

for all the observations.