Skip to main content
U.S. flag

An official website of the United States government

GCN Circulars are now part of the new GCN! See news and announcements

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 (19 days 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.
Looking for U.S. government information and services? Visit USA.gov