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. =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+/-0.026R_J_, which is intermediate to the previously reported radii of 1.067+/-0.054R_J_ and 0.922+/-0.057R_J_. We also examine the TTV and duration change claims of Diaz et al. (2008ApJ...682L..49D). Our analysis of all 11 transit epochs does not reveal any points with deviations larger than 2{sigma}, and most points are well within 1{sigma}. 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