J/MNRAS/444/776 Transiting planets WASP-24, 25 and 26 (Southworth+, 2014)
High-precision photometry by telescope defocussing.
VI. WASP-24, WASP-25 and WASP-26.
Southworth J., Hinse T. C., Burgdorf M., Calchi Novati S., Dominik M.,
Galianni P., Gerner T., Giannini E., Gu S.-H., Hundertmark M.,
Jorgensen U. G., Juncher D., Kerins E., Mancini L., Rabus M., Ricci D.,
Schaefer S., Skottfelt J., Tregloan-Reed J., Wang X.-B., Wertz O.,
Alsubai K., Andersen J. M., Bozza V., Bramich D. M., Browne P., Ciceri S.,
D'Ago D., Damerdji Y., Diehl C., Dodds P., Elyiv A., Fang X.-S., Finet F.,
Figuera Jaimes R., Hardis S., Harpsoe K., Jessen-Hansen J., Kains N.,
Kjeldsen H., Korhonen H., Liebig C., Lund M. N., Lundkvist M., Mathiasen M.,
Penny M. T., Popovas A., Proft S., Rahvar S., Sahu K., Scarpetta G.,
Schmidt R. W., Schoenebeck F., Snodgrass C., Street R. A., Surdej J.,
Tsapras Y., Vilela C.
<Mon. Not. R. Astron. Soc. 444, 776 (2014)>
=2014MNRAS.444..776S 2014MNRAS.444..776S
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry
Keywords: stars: planetary systems - methods: data analysis -
methods: observational - techniques: photometric
Abstract:
We present time-series photometric observations of thirteen transits
in the planetary systems WASP-24, WASP-25 and WASP-26. All three
systems have orbital obliquity measurements, WASP-24 and WASP-26 have
been observed with Spitzer, and WASP-25 was previously comparatively
neglected. Our light curves were obtained using the
telescope-defocussing method and have scatters of 0.5 to 1.2mmag
relative to their best-fitting geometric models. We use these data to
measure the physical properties and orbital ephemerides of the systems
to high precision, finding that our improved measurements are in good
agreement with previous studies. High-resolution Lucky Imaging
observations of all three targets show no evidence for faint stars
close enough to contaminate our photometry. We confirm the eclipsing
nature of the star closest to WASP-24 and present the detection of a
detached eclipsing binary within 4.25-arcmin of WASP-26.
Description:
Light curves of 13 transits of the extrasolar planetary systems
WASP-24, WASP-25 and WASP-26 are presented. The data were obtained
using the Danish 1.5m telescope, DFOSC imager, and Bessell R and I
filters, at ESO La Silla. The telescope was substantially defocussed
in order to improve the photometric precision of the observations. The
errorbars for each transit have been scaled so the best-fitting model
(obtained using the JKTEBOP code) has a reduced chi-squared value of
1.0.
Objects:
--------------------------------------------------------------------
RA (2000) DE Designation(s) (Period)
--------------------------------------------------------------------
15 08 51.74 +02 20 35.8 WASP-24 = TYC 339-329-1 (P=2.3412217)
13 01 26.37 -27 31 19.9 WASP-25 = TYC 6706-861-1 (P=3.7648327)
00 18 24.70 -15 16 02.3 WASP-26 = TYC 5839-876-1 (P=2.7565972)
--------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
wasp24r.dat 38 347 R-band photometry of WASP-24
wasp24i.dat 38 422 I-band photometry of WASP-24
wasp25r.dat 38 384 R-band photometry of WASP-25
wasp26i.dat 38 891 I-band photometry of WASP-26
--------------------------------------------------------------------------------
See also:
J/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009)
J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009)
J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)
J/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010)
J/A+A/527/A8 : Transiting planetary system WASP-7 (Southworth+, 2011)
J/MNRAS/420/2580 : Four transits of HAT-P-13 (Southworth+, 2012)
J/MNRAS/422/3099 : Transits of HAT-P-5 (Southworth+, 2012)
J/MNRAS/426/1338 : Transiting planetary system WASP-17 (Southworth+, 2012)
J/MNRAS/434/1300 : Planetary systems WASP-15, WASP-16 (Southworth+, 2013)
Byte-by-byte Description of file: wasp24[ri].dat wasp25r.dat wasp26i.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d BJD Barycentric JD for the midpoint of observation (TDB)
16- 25 F10.7 mag mag Differential magnitude in Band
28- 36 F9.7 mag e_mag Measurement error of the magnitude
38 A1 --- Band [RI] Bessel R or I band
--------------------------------------------------------------------------------
Acknowledgements:
John Southworth, astro.js(at)keele.ac.uk
(End) John Southworth [Keele Univ., UK], Patricia Vannier [CDS] 29-Sep-2014