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J/ApJ/714/462          Inclination change of TrES-2b            (Scuderi+, 2010)
On the apparent orbital inclination change of the extrasolar transiting
planet TrES-2b.
    Scuderi L.J., Dittmann J.A., Males J.R., Green E.M., Close L.M.
   <Astrophys. J., 714, 462-468 (2010)>
   =2010ApJ...714..462S
ADC_Keywords: Planets ; Photometry ; Stars, double and multiple

Keywords: planetary systems - stars: individual (TrES-2b)


Abstract:
    On 2009 June 15 UT the transit of TrES-2b was detected using the
    University of Arizona's 1.55m Kuiper Telescope with 2.0-2.5 millimag
    rms accuracy in the I band. We find a central transit time of
    Tc=2454997.76286±0.00035HJD, an orbital period of
    P=2.4706127±0.0000009 days, and an inclination angle of
    i=83.92°±0.05°, which is consistent with our re-fit of the
    original I-band light curve of O'Donovan et al. where we find
    i=83.84°±0.05°. We calculate an insignificant inclination
    change of Δi =-0.08°±0.07° over the last three years,
    and as such, our observations rule out, at the ∼11σ level, the
    apparent change of orbital inclination to
    ipredicted=83.35°±0.1° as predicted by Mislis & Schmitt
    and Mislis et al. for our epoch. Moreover, our analysis of a recently
    published Kepler Space Telescope light curve for TrES-2b finds an
    inclination of i=83.91°±0.03° for a similar epoch. These
    Kepler results definitively rule out change in i as a function of
    time. Indeed, we detect no significant changes in any of the orbital
    parameters of TrES-2b.

Description:
    We observed the transit of TrES-2b on 2009 June 15 UT using the
    University of Arizona's 61 inch (1.55m) Kuiper telescope on Mt.
    Bigelow, Arizona with the Mont4k CCD, binned 3x3 to 0.43"/pixel. The
    original transit observations of O'Donovan et al.
    (2006ApJ...651L..61O) used an I-band filter. After careful
    consideration, we chose to use the Arizona I-band filter already
    installed on the Mont4k filter wheel in order to match the original
    observations as closely as possible with available equipment. This
    filter is similar to a Kron-Cousins I-band filter.
Objects:
    -----------------------------------------------
       RA   (2000)    DE        Designation(s)
    -----------------------------------------------
    19 07 14.04   +49 18 59.1   TrES-2b = Kepler-1b
    -----------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        32      533   Data table of the June 15 2009 light curve
                             presented in this work


See also:
  V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
  J/A+A/529/A89    : Kepler satellite variability study (Debosscher+, 2011)
  J/A+A/510/A107   : TrES-2b multi-band transit observations (Mislis+, 2010)
  J/MNRAS/408/1494 : Planetary transits of TrES-2 and TrES-3 (Colon+, 2010)
  J/ApJ/692/L9     : Tidal evolution of transiting extrasolar planets (Levrard+,
                     2009)
  J/A+A/500/L45    : Transits of the TrES-2 exoplanet (Mislis+, 2009)
  J/A+A/508/1011   : Planetary transit of TrES-1 and TrES-2 (Rabus+, 2009)
  J/ApJ/664/1185   : Three transits of the exoplanet TrES-2 (Holman+, 2007)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1- 14  F14.6 d       HJD       Heliocentric Julian Date
  16- 23  F8.6  ---     RFlux     Relative flux in Cousins I band
  25- 32  F8.6  ---     e_RFlux   Error in RFlux


History:
    From electronic version of the journal
(End)                 Greg Schwarz [AAS], Emmanuelle Perret [CDS]    16-Apr-2012