J/A+A/625/L13ivo://CDS.VizieR/J/A+A/625/L13doi:10.26093/cds/vizier.36259013CDSZieba S.Zwintz K.Kenworthy M.Kennedy G.M.2019-06-06T05:39:38Z2019-05-27T08:24:20ZCDS support team

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

cds-question@unistra.frcometsccd-photometryspace-observatoriesobservational-astronomyWe search for signs of falling evaporating bodies (FEBs, also known as exocomets) in photometric time series obtained for {beta} Pictoris after fitting and removing its {delta} Scuti-type pulsation frequencies. Using photometric data obtained by the TESS satellite we determined the pulsational properties of the exoplanet host star {beta} Pictoris through frequency analysis. We then pre-whitened the 54 identified {delta} Scuti p-modes and investigated the residual photometric time series for the presence of FEBs. We identify three distinct dipping events in the light curve of {beta} Pictoris over a 105-day period. These dips have depths from 0.5 to 2-millimagnitudes and durations of up to 2-days for the largest dip. These dips are asymmetric in nature and are consistent with a model of an evaporating comet with an extended tail crossing the disc of the star. We present the first broadband detections of exocomets crossing the disc of {beta} Pictoris, complementing the predictions made 20 years earlier by Lecavelier Des Etangs et al. (1999A&A...343..916L). No periodic transits are seen in this time series. These observations confirm the spectroscopic detection of exocomets in calcium H and K lines that have been seen in high resolution spectroscopy.2019A&A...625L..13Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/625/L13CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/299/557 : Light variations on Beta Pic (Lecavelier des Etangs+, 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/625/L13https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/625/L13http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/625/L13https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/625/L13https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/625/L13http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/625/L13GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/625/L13/tessbpicTime and magnitudesFluxReduced flux in instrumental magnitudesphot.mag;em.optdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObs.DateObservation date (BJD-2457000.0)dtime.epoch;obsdouble