J/AJ/137/4911 Six transits of the exoplanet XO-2b (Fernandez+, 2009)
The transit light curve project. XII. Six transits of the exoplanet XO-2b.
Fernandez J.M., Holman M.J., Winn J.N., Torres G., Shporer A., Mazeh T.,
Esquerdo G.A., Everett M.E.
<Astron. J., 137, 4911-4916 (2009)>
=2009AJ....137.4911F 2009AJ....137.4911F
ADC_Keywords: Stars, variable ; Planets ; Photometry
Keywords: planetary systems - stars: individual (XO-2, GSC 03413-00005)
Abstract:
We present photometry of six transits of the exoplanet XO-2b. By
combining the light-curve analysis with theoretical isochrones to
determine the stellar properties, we find the planetary radius to be
0.996+0.031-0.018RJup and the planetary mass to be
0.565±0.054MJup. These results are consistent with those reported
previously, and are also consistent with theoretical models for gas
giant planets. The midtransit times are accurate to within 1 minute
and are consistent with a constant period. However, the period we
derive differs by 2.5{sigma } from the previously published period.
More data are needed to tell whether the period is actually variable
(as it would be in the presence of an additional body) or if the
timing errors have been underestimated.
Description:
We observed four complete transits, and one partial transit, with the
1.2m (48 inch) telescope at the Fred L. Whipple Observatory (FLWO) on
Mount Hopkins in Arizona, on 2008 Jan 1, Jan 14, Feb 12, Feb 25 and
Mar 04. We observed one complete transit with the Centurion 0.46m
(18inch) telescope, at the Wise Observatory in Israel on 2008 Mar 06.
Objects:
---------------------------------------------
RA (2000) DE Designation(s)
---------------------------------------------
07 48 06.5 +50 13 33 XO-2 = TYC 3413-5-1
---------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 34 2630 Transit light curve
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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)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Obs.Date Observation date (1)
12 A1 --- Filt [zn] Filter (SDSS z or n for 'no filter')
14- 26 F13.5 d HJD Heliocentric Julian Date
28- 34 F7.5 --- Rflux Relative flux
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Note (1): Additional observational details for each individual date as follows:
2008/01/01 = 1.2m FLWO, KeplerCam, Sloan z
2008/01/14 = 1.2m FLWO, KeplerCam, Sloan z
2008/02/12 = 1.2m FLWO, KeplerCam, Sloan z
2008/02/25 = 1.2m FLWO, KeplerCam, Sloan z
2008/03/04 = 1.2m FLWO, KeplerCam, Sloan z
2008/03/06 = 0.46m Wise, SBIG ST-10 XME, no filter
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History:
From electronic version of the journal
References:
Holman et al., Paper I 2006ApJ...652.1715H 2006ApJ...652.1715H, Cat. J/ApJ/652/1715
Winn et al., Paper II 2007AJ....133...11W 2007AJ....133...11W, Cat. J/AJ/133/11
Winn et al., Paper III 2007ApJ...657.1098W 2007ApJ...657.1098W, Cat. J/ApJ/657/1098
Holman et al., Paper IV 2007ApJ...655.1103H 2007ApJ...655.1103H, Cat. J/ApJ/655/1103
Winn et al., Paper V 2007AJ....133.1828W 2007AJ....133.1828W, Cat. J/AJ/133/1828
Holman et al. Paper VI 2007ApJ...664.1185H 2007ApJ...664.1185H, Cat. J/ApJ/664/1185
Winn et al., Paper VII 2007AJ....134.1707W 2007AJ....134.1707W, Cat. J/AJ/134/1707
Winn et al., Paper VIII 2008AJ....136..267W 2008AJ....136..267W, Cat. J/AJ/136/267
Winn et al., Paper IX 2008ApJ...683.1076W 2008ApJ...683.1076W, Cat. J/ApJ/683/1076
Winn et al., Paper X 2009ApJ...693..794W 2009ApJ...693..794W, Cat. J/ApJ/693/794
Winn et al., Paper XI 2009AJ....137.3826W 2009AJ....137.3826W, Cat. J/AJ/137/3826
Fernandez et al., Paper XII 2009AJ....137.4911F 2009AJ....137.4911F, Cat. J/AJ/137/4911
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 09-Aug-2009