J/A+A/522/A29 OGLE2-TR-L9 g'r'i'z' light curves (Lendl+, 2010)
New parameters and transit timing studies for OGLE2-TR-L9 b.
Lendl M., Afonso C., Koppenhoefer J., Nikolov N., Henning T., Swain M.,
Greiner J.
<Astron. Astrophys. 522, A29 (2010)>
=2010A&A...522A..29L 2010A&A...522A..29L
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry, SDSS
Keywords: techniques: photometric ; planetary systems ;
planets and satellites: individual: OGLE2-TR-L9 b
Abstract:
Repeated observations of exoplanet transits allow us to refine the
planetary parameters and probe them for any time dependent variations.
In particular deviations of the period from a strictly linear
ephemeris, transit timing variations (TTVs), can indicate the presence
of additional bodies in the planetary system. Aims: Our goal was to
reexamine the largely unstudied OGLE2-TR-L9 system with high cadence,
multi-color photometry in order to refine the planetary parameters and
probe the system for TTVs.
From our analysis we find that the semi-major axis and the inclination
differ from the previously published values. With the newly observed
transits, we were able to refine the ephemeris to
2454492.80008(±0.00014) +2.48553417(±6.4)x10-7E. The newly
derived parameters are a=0.0418(±0.0015)AU, rp=1.67(±0.05) Rj,
and inc=82.47°(±0.12), differing significantly in a and inc from
the previously published values. Within our data, we find indications
for TTVs.
Description:
We observed five full transits of OGLE2-TR-L9 with the GROND
instrument at the ESO/MPG 2.2m telescope at La Silla Observatory.
GROND is a multichannel imager that allowed us to gather simultaneous
light curves in the g', r', i', and z' filters.
Objects:
---------------------------------------------------------------
RA (2000) DE Designation(s)
---------------------------------------------------------------
11 07 55.2 -61 08 47 OGLE2-TR-L9 = 2MASS J11075518-6108465
---------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tableg.dat 34 922 g' data
tablei.dat 34 921 i' data
tabler.dat 34 917 r' data
tablez.dat 34 922 z' data
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table*.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d HJD Heliocentric Julian Date
18- 24 F7.4 mag mag SDSS g', i', r' or z' differential magnitude
28- 34 F7.4 mag e_mag rms uncertainty on mag
--------------------------------------------------------------------------------
Acknowledgements:
Monika Lendl, Monika.Lendl(at)unige.ch
(End) Patricia Vannier [CDS] 20-Oct-2010