GCN Circular 33832
Subject
LIGO/Virgo/KAGRA S230518h: Swift/UVOT Upper Limits for Swope candidates: SSS23a, SSS23b and SSS23c
Date
2023-05-20T12:10:28Z (a year ago)
From
Samantha Oates at University of Birmingham <samantha.oates@alumni.ucl.ac.uk>
LIGO/Virgo/KAGRA S230518h: Swift/UVOT Upper Limits for Swope candidates: SSS23a, SSS23b and SSS23c
S. R. Oates (U. of Birmingham), A. A. Breeveld (MSSL-UCL), P. Brown (TAMU),
M. De Pasquale (U. Messina), C. Gronwall (PSU), N. Klingler (NASA-GSFC/UMBC/CRESST II),
N. P. M. Kuin (UCL-MSSL), F. E. Marshall (NASA/GSFC), M. J. Page (UCL-MSSL),
M. H. Siegel (PSU), A.P. Beardmore (U. Leicester), M.G. Bernardini (INAF-OAB),
S. Campana (INAF-OAB), S.B. Cenko (NASA/GSFC), A. D’Aì (INAF-IASFPA), P. D’Avanzo (INAF-OAB),
V. D’Elia (ASI-SSDC & INAF-OAR), S. Dichiara (PSU), P.A. Evans (U. Leicester),
R.A.J. Eyles-Ferris (U. Leicester), D. Hartmann (Clemson University),
J.A. Kennea (PSU), S. Laha (NASA/GSFC), A.Y. Lien (GSFC/UMBC), A. Melandri (INAF-OAB),
J.A. Nousek (PSU), P. O’Brien (U. Leicester), J.P. Osborne (U. Leicester),
K.L. Page (U. Leicester), D. M. Palmer (LANL), S. Ronchini (PSU), T. Sbarrato (INAF-OAB),
B. Sbarufatti (INAF-OAB), G. Tagliaferri (INAF-OAB), A. Tohuvavohu (U. Toronto),
E. Troja (U Tor Vergata, INAF) report on behalf of the Swift team:
We report Swift/UVOT observations of the candidates SSS23a, SSS23b and SSS23c (Coulter et al.,
GCN Circ. 33829) found by the Swope 1-m telescope during the search for the EM counterpart
of the LVC event S230518h (LIGO/VIRGO/KAGRA Collaboration GCN Circ. 33813).
Swift/UVOT observations of the Swope candidates began 1.5 days after the LVK trigger
(LIGO/VIRGO/KAGRA Collaboration GCN Circ. 33813). We do not detect any of the 3 Swope candidates
in the UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the exposures are:
Target Filter T_start(s) T_stop(s) Exp(s) 3sigUL
SSS23a u 129503 135881 288 >19.2
SSS23a w1 129079 135788 585 >19.9
SSS23a m2 128445 135607 879 >20.2
SSS23a w2 129713 136188 753 >20.1
SSS23b u 140770 140997 223 >19.1
SSS23b w1 140310 140765 448 >19.8
SSS23b m2 139622 140304 671 >20.1
SSS23b w2 141004 141319 309 >19.6
SSS23c u 130526 141885 131 >18.7
SSS23c w1 130415 141799 264 >19.3
SSS23c m2 130250 141633 395 >19.6
SSS23c w2 130586 142008 133 >19.0
This circular is an official product of the Swift team.