J/ApJ/714/13 Transits of OGLE-TR-111b (Adams+, 2010)
Lack of transit timing variations of OGLE-TR-111b: a re-analysis with six new
epochs.
Adams E.R., Lopez-Morales M., Elliot J.L., Seager S., Osip D.J.
<Astrophys. J., 714, 13-24 (2010)>
=2010ApJ...714...13A 2010ApJ...714...13A
ADC_Keywords: Planets ; Photometry ; Stars, double and multiple
Keywords: planetary systems - stars: individual (OGLE-TR-111) -
techniques: photometric
Abstract:
We present six new transits of the exoplanet OGLE-TR-111b observed
with the Magellan Telescopes in Chile between 2008 April and 2009
March. We combine these new transits with five previously published
transit epochs for this planet between 2005 and 2006 to extend the
analysis of transit timing variations (TTVs) reported for this system.
We derive a new planetary radius value of 1.019±0.026RJ, which is
intermediate to the previously reported radii of 1.067±0.054RJ and
0.922±0.057RJ. We also examine the TTV and duration change claims
of Diaz et al. (2008ApJ...682L..49D 2008ApJ...682L..49D). Our analysis of all 11 transit
epochs does not reveal any points with deviations larger than
2σ, and most points are well within 1σ. Although the
transit duration nominally decreases over the four year span of the
data, systematic errors in the photometry can account for this result.
Therefore, there is no compelling evidence for either a timing or a
duration variation in this system. Numerical integrations place an
upper limit of about 1M{earth} on the mass of a potential second
planet in a 2:1 mean-motion resonance with OGLE-TR-111b.
Description:
All six new transits were observed between 2008 April and 2009 March
in the Sloan i' filter with the new MagIC-e2v camera on Magellan.
Objects:
------------------------------------------------------------
RA (2000) DE Designation(s)
------------------------------------------------------------
10 53 17.91 -61 24 20.3 OGLE-TR-111b = NAME OGLE-TR-111b
------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table4.dat 47 2205 Flux values for new transits of OGLE-TR-111b
--------------------------------------------------------------------------------
See also:
II/278 : Transits observed in OGLE 2001-2003 (Udalski+, 2002-2004)
J/A+A/509/A4 : Transits of 12 new exoplanet candidates (Pietrukowicz+, 2010)
J/ApJ/692/L9 : Tidal evolution of transiting extrasolar planets (Levrard+,
2009)
J/AJ/133/11 : Photometry of OGLE-TR 111 (Winn+, 2007)
J/A+A/458/997 : Abundances for 6 transiting planet host stars (Santos+, 2006)
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d UTC UTC mid-exposure time
16- 29 F14.6 d BJD Barycentric JD mid-exposure time
31- 39 F9.7 --- Flux Observed relative flux in i' filter
41- 47 F7.5 --- e_Flux Error in Flux
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-Apr-2012