J/ApJ/885/161ivo://CDS.VizieR/J/ApJ/885/161doi:10.26093/cds/vizier.18850161CDSBentz M.C.Ferrarese L.Onken C.A.Peterson B.M.Valluri M.2022-06-03T08:26:47Z2021-10-04T07:02:06ZCDS support team

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

cds-question@unistra.frseyfert-galaxiesvariable-starshst-photometryvisible-astronomyWe present a Cepheid-based distance to the nearby Seyfert galaxy NGC6814 from Hubble Space Telescope observations. We obtained F555W and F814W imaging over the course of 12 visits with logarithmic time spacing in 2013 August-October. We detected and made photometric measurements for 16469 unique sources across all images in both filters, from which we identify 90 excellent Cepheid candidates spanning a range of periods of 13-84days. We find evidence for incompleteness in the detection of candidates at periods <21days. Based on the analysis of Cepheid candidates above the incompleteness limit, we determine a distance modulus for NGC6814 relative to the LMC of {mu}_rel,LMC_=13.200_-0.031_^+0.031^mag. Adopting the recent constraint of the distance modulus to the LMC determined by Pietrzynski et al., we find m-M=31.677_-0.041_^+0.041^ which gives a distance of 21.65{+/-}0.41Mpc to NGC6814.2019ApJ...885..161Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/885/161CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/652/1133 : BVI photometry of NGC 4258 Cepheids (Macri+, 2006)J/ApJ/730/119 : HST/WFC3 observations of Cepheids in SN Ia hosts (Riess+,2011)J/ApJ/733/124 : Cepheids in M101 observed with HST (Shappee+, 2011)J/AJ/146/86 : Cosmicflows-2 catalog (Tully+, 2013)J/ApJ/799/144 : M31 Cepheids in near-IR (Kodric+, 2015)J/AcA/65/297 : OGLE4 LMC and SMC Cepheids (Soszynski+, 2015)J/ApJ/830/10 : >20yrs of HST obs. Cepheids in SNIa host gal. (Hoffmann+,2016)J/ApJ/866/133 : Continuum-H{beta} light curves of 5 Seyfert 1 (De Rosa+, 2018)J/ApJ/876/85 : HST observations for LMC Cepheids (Riess+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/885/161https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/885/161http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/885/161https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/885/161https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/885/161http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/885/161GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/885/161/table2 (Best-fit properties of cepheid candidates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/885/161/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/885/161/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/885/161/table2?GETtext/xml+votable180.050000true295.68204167-10.336243060.0055555555555555566/297952.0401237512456292e-19 4.2441532724171825e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/885/161?format=asciiOpticaldefaultJ/ApJ/885/161/table2Best-fit properties of cepheid candidatesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/90] Sequential numbermeta.recordintRAJ2000[19] Hour of right ascension (J2000)pos.eq.ra;meta.mainDEJ2000[10] Degree of declination (J2000)pos.eq.dec;meta.mainF555W[25.6/28.2] F555W magnitudemagphot.mag;em.opt.Vfloate_F555W[0.02/0.2] Error on F555Wmagstat.errorfloatF814W[24.5/26.9] F814W magnitudemagphot.mag;em.opt.Ifloate_F814W[0.03/0.2] Error on F814Wmagstat.errorfloatPer[13.1/83.6] Perioddtime.periodfloate_Per[0.2/9.6] Error on Perdstat.errorfloatPhase[0.54/55.2] Phase of light curve relative to the date of first visitdtime.phasefloate_Phase[0.2/5.6] Error on Phasedstat.error;time.phasefloatchi/nu[0.44/3.98] {chi}^2^/{nu} valuestat.fit.chi2floatSimbadSimbad column added by the CDSmeta.ref.urlchar