J/AJ/154/142ivo://CDS.VizieR/J/AJ/154/142doi:10.26093/cds/vizier.51540142CDSDittmann J.A.Irwin J.M.Charbonneau D.Berta-Thompson Z.K.Newton E.R.2018-08-22T07:59:50Z2018-07-09T10:00:07ZCDS support team

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

cds-question@unistra.frexoplanetsm-starsinfrared-photometryWe present the results of a search for additional bodies in the GJ 1132 system through two methods: photometric transits and transit timing variations of GJ 1132b. We collected 21 transit observations of GJ 1132b with the MEarth-South array. We obtained 100 near-continuous hours of observations with the Spitzer Space Telescope, including two transits of GJ 1132b and spanning 60% of the orbital phase of the maximum (6.9-day) period at which bodies coplanar with GJ 1132b would transit. We exclude transits of additional Mars-sized bodies, such as a second planet or a moon, with a confidence of 99.7%. We find that the planet-to-star radius ratio inferred from the MEarth and Spitzer light curves are discrepant at the 3.7{sigma} level, which we ascribe to the effects of starspots and faculae. When we combine the mass estimate of the star (obtained from its parallax and apparent K_s_ band magnitude) with the stellar density inferred from our high-cadence Spitzer light curve (assuming zero eccentricity), we measure the stellar radius of GJ 1132 to be 0.2105_-0.0085_^+0.0102^ R_{sun}_, and we refine the radius measurement of GJ 1132b to 1.130+/-0.056 R_{Earth}_. Combined with HARPS RV measurements, we determine the density of GJ 1132b to be 6.2+/-2.0 g/cm^3^. We refine the ephemeris of the system (improving the period determination by an order of magnitude) and find no evidence for transit timing variations, which would be expected if there was a second planet near an orbital resonance with GJ 1132b.2017AJ....154..142Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/154/142CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/AJ/153/191 : Transiting planet GJ 1132 (Southworth+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/154/142https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/154/142http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/154/142https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/154/142https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/154/142http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/154/142GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/AJ/154/142/table1Photometry of GJ 1132recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBJD[57332.2/57575.1] Barycentric Julian Date (BJD-2400000)dtime.epochdoubleNFlux[0.955081/1.02304]? Normalized fluxphot.flux;arith.ratiodoublenullablee_NFlux[0.001956/0.00825]? Error in NFluxstat.errordoublenullableInstInstrument used (Spitzer, MEarth)instr.setupchar