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J/AJ/141/179        Transits of TrES-4b, HAT-P-3b and WASP-12b    (Chan+, 2011)
The transit light-curve project.
XIV. Confirmation of anomalous radii for the exoplanets TrES-4b, HAT-P-3b, and
WASP-12b.
    Chan T., Ingemyr M., Winn J.N., Holman M.J., Sanchis-Ojeda R., Esquerdo G.,
    Everett M.
   <Astron. J., 141, 179 (2011)>
   =2011AJ....141..179C
ADC_Keywords: Stars, variable ; Planets ; Photometry

Keywords: planetary systems - stars: individual (TrES-4, HAT-P-3, WASP-12)


Abstract:
    We present transit photometry of three exoplanets, TrES-4b, HAT-P-3b,
    and WASP-12b, allowing for refined estimates of the systems'
    parameters. TrES-4b and WASP-12b were confirmed to be "bloated"
    planets, with radii of 1.706±0.056RJup and 1.736±0.092RJup,
    respectively. These planets are too large to be explained with
    standard models of gas giant planets. In contrast, HAT-P-3b has a
    radius of 0.827±0.055RJup, smaller than a pure hydrogen-helium
    planet and indicative of a highly metal-enriched composition. Analyses
    of the transit timings revealed no significant departures from strict
    periodicity. For TrES-4, our relatively recent observations allow for
    improvement in the orbital ephemerides, which is useful for planning
    future observations.

Description:
    Almost all the observations were conducted at the Fred Lawrence
    Whipple Observatory located on Mt. Hopkins, AZ, using the 1.2m
    telescope and KeplerCam detector. The KeplerCam is a 40962 CCD with a
    field of view of 23.1'x23.1'. The pixels were binned 2x2 on the chip
    for faster readout. The binned pixels subtend 0.68" on a side.
    Observations were made through Sloan i and z filters. One of the
    WASP-12 transits was observed with the Nordic Optical Telescope (NOT)
    located in the Canary Islands, using the ALFOSC detector.
Objects:
    ------------------------------------------------------------------------
       RA   (2000)   DE        Designation(s)               (Period)
    ------------------------------------------------------------------------
    17 53 13.06  +37 12 42.4   TrES-4    = NAME TrES-4b     (P=3.5539268)
    13 44 22.59  +48 01 43.2   HAT-P-3   = TYC 3466-819-1   (P=2.8997360)
    06 30 32.79  +29 40 20.3   WASP-12   = TYC 1891-1178-1  (P=1.0914222)
    ------------------------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        36      765   Photometry of TrES-4 in i
table3.dat        36     1764   Photometry of HAT-P-3 in i, z
table4.dat        36     1141   Photometry of WASP-12 in V, i
                             (from erratum in AJ, 144, 90 (2012)


See also:
   J/ApJ/652/1715 : Four transits of the exoplanet XO-1b (Holman+, 2006)
   J/AJ/133/11    : Photometry of OGLE-TR 111 (Winn+, 2007)
   J/ApJ/657/1098 : Transit of TrES-1 (Winn+, 2007)
   J/ApJ/655/1103 : Five transits of the exoplanet OGLE-TR-10b (Holman+, 2007)
   J/AJ/133/1828  : Transit light curves of HD 189733 (Winn+, 2007)
   J/ApJ/664/1185 : Three transits of the exoplanet TrES-2 (Holman+, 2007)
   J/AJ/134/1707  : Six transit of exoplanet HAT-P-1b (Winn+, 2007)
   J/AJ/136/267   : Six occultations of the exoplanet TrES-3 (Winn+, 2008)
   J/ApJ/683/1076 : Transits of exoplanet XO-3b (Winn+, 2008)
   J/ApJ/693/794  : Transit of exoplanet HD 17156b (Winn+, 2009)
   J/AJ/137/3826  : Two transits of the giant planet WASP-4b (Winn+, 2009)
   J/AJ/137/4911  : Six transits of the exoplanet XO-2b (Fernandez+, 2009)


Byte-by-byte Description of file: table2.dat table3.dat table4.dat

   Bytes Format Units   Label     Explanations

       1  A1    ---     Filt      [izV] Filter used in the observation
   3- 18  F16.8 d       HJD       Heliocentric Julian Date (1)
  20- 29  F10.8 ---     RFlux     Relative flux
  31- 36  F6.4  ---     Air       Airmass

Note (1): The time-stamp represents the UT-based Heliocentric Julian Date
          at midexposure.


History:
    From electronic version of the journal

References:
    Holman et al.,    Paper I     2006ApJ...652.1715H, Cat. J/ApJ/652/1715
    Winn et al.,      Paper II    2007AJ....133...11W, Cat. J/AJ/133/11
    Winn et al.,      Paper III   2007ApJ...657.1098W, Cat. J/ApJ/657/1098
    Holman et al.,    Paper IV    2007ApJ...655.1103H, Cat. J/ApJ/655/1103
    Winn et al.,      Paper V     2007AJ....133.1828W, Cat. J/AJ/133/1828
    Holman et al.,    Paper VI    2007ApJ...664.1185H, Cat. J/ApJ/664/1185
    Winn et al.,      Paper VII   2007AJ....134.1707W, Cat. J/AJ/134/1707
    Winn et al.,      Paper VIII  2008AJ....136..267W, Cat. J/AJ/136/267
    Winn et al.,      Paper IX    2008ApJ...683.1076W, Cat. J/ApJ/683/1076
    Winn et al.,      Paper X     2009ApJ...693..794W, Cat. J/ApJ/693/794
    Winn et al.,      Paper XI    2009AJ....137.3826W, Cat. J/AJ/137/3826
    Fernandez et al., Paper XII   2009AJ....137.4911F, Cat. J/AJ/137/4911
    Carter et al.,    Paper XIII  2011ApJ...730...82C
(End)                  Greg Schwarz [AAS]  Patricia Vannier [CDS]    13-Sep-2012