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J/A+A/544/L12       Velocitometry transit of KOI-13          (Santerne+, 2012)
SOPHIE velocimetry of Kepler transit candidates.
VII. An additional companion in the KOI-13 system.
    Santerne A., Moutou C., Barros S.C.C., Damiani C., Diaz R.F., Deleuil J.-M.,
    Hebrard G.
   <Astron. Astrophys. 544, L12 (2012)>
   =2012A&A...544L..12S
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities

Keywords: planetary systems - techniques: radial velocities -
          techniques: spectroscopic

Abstract:
    We report the discovery of a new stellar companion in the KOI-13
    system. KOI-13 is composed of two fast-rotating A-type stars of
    similar magnitude. One of these two stars hosts a transiting planet
    discovered by Kepler. We obtained new radial velocity measurements
    using the SOPHIE spectrograph at the Observatoire de Haute-Provence
    that reveal an additional companion in this system. This companion has
    a mass of between 0.4M☉ and 1M☉ and orbits one of the two
    main stars with a period of 65.831±0.029-days and an eccentricity of
    0.52±0.02.

Description:
    We performed spectroscopic observations of the KOI-13 system with the
    SOPHIE spectrograph mounted on the 1.93-m telescope at Observatoire de
    Haute-Provence, France. We acquired 17 high resolution spectra from
    2011, March 25 to 2012, May 231 using the high efficiency mode
    (R∼39000 at 550nm) of SOPHIE and the fast CCD read-out mode
Objects:
    --------------------------------------------------
       RA   (2000)   DE        Designation(s)
    --------------------------------------------------
    19 07 53.11  +46 52 06.0   KOI-13 = BD+46  2629
    --------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        50       17   SOPHIE radial velocity data


See also:
   J/A+A/528/A63 : Velocitometry transit of KOI-428b (Santerne+, 2011)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

   1- 13  F13.5 d       BJD       Barycentric Julian Date of observation
  15- 20  F6.3  km/s    BRVa      Barycentric radial velocity of KOI-13α
  22- 26  F5.3  km/s    e_BRVa    rms uncertainty on BRVa
  28- 33  F6.3  km/s    BRVb      Barycentric radial velocity of KOI-13β
  35- 39  F5.3  km/s    e_BRVb    rms uncertainty on BRVb
  41- 44  I4    s       Texp      Exposure Time
  46- 50  F5.1  ---     SNR       Signal-to-noise ratio per pixel at 550nm


Acknowledgements:
     Alexandre Santerne, Alexandre.Santerne(at)oamp.fr

References:
     Ehrenreich et al., Paper I    2011A&A...525A..85E
     Santerne et al.,   Paper II   2011A&A...528A..63S, Cat. J/A+A/528/A63
     Bouchy et al.,     Paper III  2011A&A...533A..83B
     Santerne et al.,   Paper IV   2011A&A...536A..70S
     Bonomo et al.,     Paper V    2012A&A...538A..96B
(End)                                        Patricia Vannier [CDS]  02-Aug-2012