J/ApJ/884/L55ivo://CDS.VizieR/J/ApJ/884/L55doi:10.26093/cds/vizier.18849055CDSGomez S.Hosseinzadeh G.Cowperthwaite P.S.Villar V.A.Berger E.,Gardner T.Alexander K.D.Blanchard P.K.Chornock R.Drout M.R.,Eftekhari T.Fong W.Gill K.Margutti R.Nicholl M.Paterson K.,Williams P.K.G.2021-09-09T12:22:40Z2021-04-20T09:36:11ZCDS support team

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

cds-question@unistra.frgalaxiesspectroscopyredshiftedabsolute-magnitudevisible-astronomygravitational-wavesOn 2019 August 14 the Laser Interferometer Gravitational Wave Observatory (LIGO) and the Virgo gravitational wave interferometer announced the detection of a binary merger, S190814bv, with a low false alarm rate of about 1 in 1.6x10^25^yr, a distance of 267+/-52Mpc, a 90% (50%) localization region of about 23 (5) deg^2^, and a probability of being a neutron star-black hole (NS-BH) merger of >99%. The LIGO/Virgo Collaboration (LVC) defines NS-BH such that the lighter binary member has a mass of <3M_{sun}_ and the more massive one has >5M_{sun}_, and this classification is in principle consistent with a BH-BH merger depending on the actual upper mass cutoff for neutron stars. Additionally, the LVC designated a probability that the merger led to matter outside the final BH remnant of <1%, suggesting that an electromagnetic (EM) counterpart is unlikely. Here we report our optical follow-up observations of S190814bv using the Magellan Baade 6.5m telescope to target all 96 galaxies in the Galaxy List for the Advanced Detector Era catalog within the 50% localization volume (representing about 70% of the integrated luminosity within this region). No counterpart was identified to a median 3{sigma} limiting magnitude of i=22.2 (M_i_~-14.9mag), comparable to the brightness of the optical counterpart of the binary neutron star merger GW170817 at the distance of S190814bv; similarly, we can rule out an on-axis jet typical of short GRBs. However, we cannot rule out other realistic models, such as a kilonova with only ~0.01M_{sun}_ of lanthanide-rich material, or an off-axis jet with a viewing angle of {theta}_obs_>~15{deg}.2019ApJ...884L..55Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/884/L55CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/281 : GLADE v2.3 catalog (Dalya+, 2018)J/ApJ/848/L16 : Counterpart of GW170817. I. DECam obs. (Soares-Santos+, 2017)J/ApJ/848/L29 : Opt. follow-up of GW170817 counterpart (Diaz+, 2017)J/ApJ/851/L21 : UV-NIR obs. compilation of GW170817 counterpart (Villar+, 2017)J/PASJ/70/28 : Subaru HSC counterpart candidates of GW170817 (Tominaga+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/884/L55https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/884/L55http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/884/L55https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/884/L55https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/884/L55http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/884/L55GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/884/L55/table1 (Log of Magellan follow-up observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/884/L55/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/884/L55/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/884/L55/table1?GETtext/xml+votable180.050000true12.42375-25.05080560.0055555555555555565/4166 6/16647 16653 16655 16656 16658 16659 16668 16670 16688 16689 16692https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/884/L55?format=asciiOpticaldefaultJ/ApJ/884/L55/table1Log of Magellan follow-up observationsNameName of the galaxymeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintf_Nameb: GCN circular 25382 accidentally omitted this galaxymeta.codecharRAJ2000Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of declination (J2000)pos.eq.dec;meta.mainobsUT date of the observationstime.epoch;obsnullableMJD[58711.3/58712.5] Modified Julian Datedtime.epochdoublez[0.026/0.074] Redshiftsrc.redshiftfloatBMag[-22.02/-18.53] Absolute B band magnitudemagphys.magAbs;em.opt.BfloatLim[19.39/22.54] Limiting magnitude corrected for Milky Way extinctionmagphot.magfloatSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlcharLEDAmeta.ref.urlchar