J/A+A/649/A72ivo://CDS.VizieR/J/A+A/649/A72doi:10.26093/cds/vizier.36490072CDSde Wet S.Groot P.J.Bloemen S.Le Poole R.Klein-Wolt M.Koerding E.,McBride V.Paterson K.Pieterse D.L.A.Vreeswijk P.M.Woudt P.2021-09-17T07:25:52Z2021-05-14T08:18:18ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frnovaephotometryvisible-astronomyThe Advanced LIGO and Virgo gravitational wave observatories detected a signal on 2019 August 14 during their third observing run, named GW190814. A large number of electromagnetic facilities conducted follow-up campaigns in the search for a possible counterpart to the gravitational wave event, which was made especially promising given the early source classification of a neutron star-black hole merger. We present the results of the GW follow-up campaign taken with the wide-field optical telescope MeerLICHT, located at the South African Astronomical Observatory Sutherland site. We use our results to constrain possible kilonova models. MeerLICHT observed more than 95% of the probability localisation each night for over a week in three optical bands (u,q,i) with our initial observations beginning almost 2 hours after the GW detection. We describe the search for new transients in MeerLICHT data and investigate how our limiting magnitudes can be used to constrain an AT2017gfo-like kilonova. A single new transient was found in our analysis of MeerLICHT data, which we exclude from being the electromagnetic counterpart to GW190814 owing to the existence of a spatially unresolved source at the coordinates of the transient in archival data. Using our limiting magnitudes, the confidence with which we can exclude the presence of an AT2017gfo-like kilonova at the distance of GW190814 was low (<10^-4^).2021A&A...649A..72Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/649/A72CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/649/A72https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/649/A72http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/649/A72https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/649/A72https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/649/A72http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/649/A72GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/649/A72/tablea1 (Usable observations taken with MeerLICHT)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/649/A72/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/649/A72/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/649/A72/tablea1?GETtext/xml+votable180.050000true24.375-34.128230.0055555555555555566/16644 16652 16657-16658 16665-16666 16669 16677 16691-16692 35614 35637-35638 35643 35646 35759https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/649/A72?format=asciiOpticaldefaultJ/A+A/649/A72/tablea1Usable observations taken with MeerLICHTrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldID of the field according to MeerLICHT's fixed sky-gridmeta.id;obs.fieldintP2DGW190814 sky location probability density contained within field%stat.fit.goodnessfloatRAJ2000Right ascension of the field centre (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the field centre (J2000)degpos.eq.dec;meta.mainMJDModified Julian date of observationdtime.epochdoubleFilter[uqi] Filter usedinstr.setup;instr.filtercharlimmagAB limiting magnitude in Filtermagphot.magfloat