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J/A+A/507/481       GJ 436b and XO-1b transits                  (Caceres+, 2009)

High Cadence Near Infrared Timing Observations of Extrasolar Planets: I. GJ 436b and XO-1b. Caceres C., Ivanov V.D., Minniti D., Naef D., Melo C., Mason E., Selman F. <Astron. Astrophys. 507, 481 (2009)> =2009A&A...507..481C
ADC_Keywords: Planets ; Photometry, infrared Keywords: stars: planetary systems - stars: individual: GJ 436 methods: observational - stars: individual: XO-1b Abstract: Currently the only technique sensitive to Earth mass planets around nearby stars (that are too close for microlensing) is the monitoring of the transit time variations of the transiting extrasolar planets. We search for additional planets in the systems of the hot Neptune GJ 436b, and the hot-Jupiter XO-1b, using high cadence observations in the J and KS bands. New high-precision transit timing measurements are reported: GJ 436b Tc=2454238.47898±0.00046HJD; XO-1b Tc(A)=2454218.83331±0.00114HJD, Tc(B)=2454222.77539±0.00036HJD, Tc(C)=2454222.77597±0.00039HJD, Tc(D)=2454226.71769±0.00034HJD, and they were used to derive new ephemeris. We also determined depths for these transits. No statistically significant timing deviations were detected. We demonstrate that the high cadence ground based near-infrared observations are successful in constraining the mean transit time to 30s, and are a viable alternative to space missions. Description: File table2 contains all the data points from the obtained light curves of the transiting planets GJ 436b, and XO-1b. It includes the HJD of observation, the normalized to the out-of-transit average flux, and the photometry error estimation. It starts with the only observation of planet GJ 436b, following the four runs of the planet XO-1b (A to D). Objects: --------------------------------------------------------------------- RA (2000) DE Designation(s) (Files Periods) --------------------------------------------------------------------- 11 42 11.1 +26 42 24 GJ 436b = GJ 436 b (table2a P=2.6438986) 16 02 11.8 +28 10 10 XO-1b = XO-1b (table2b P=3.9415128) --------------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2a.dat 45 35266 GJ 436b Transit light curves table2b.dat 45 333441 XO-1b Transit light curves
See also: J/A+A/471/L51 : Spitzer obs. of the hot Neptune GJ 436b (Gillon+, 2007) J/A+A/475/1125 : Characterization of the hot Neptune GJ 436b (Demory+, 2007) J/A+A/486/1039 : HST transit light curve for GJ436b (Bean+, 2008) J/MNRAS/384/1097 : SuperWASP-North extrasolar planet candidates (Kane+, 2008) Byte-by-byte Description of file: table2?.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Target Target name 8 A1 --- Run [ABCD] Run number for XO-1b 12- 25 F14.6 d HJD Heliocentric Julian Date 27- 35 F9.6 --- Flux Normalized flux 37- 45 F9.6 --- e_Flux Flux error estimation
Acknowledgements: Claudio Caceres, cccacere(at)
(End) Patricia Vannier [CDS] 22-May-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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