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J/A+A/539/A28  New transit photometry for super-Earth 55 Cnc e   (Gillon+, 2012)

Improved precision on the radius of the nearby super-Earth 55 Cnc e. Gillon M., Demory B.-O., Benneke B., Valencia D., Deming D., Seager S., Lovis C., Mayor M., Pepe F., Queloz D., Segransan D., Udry S. <Astron. Astrophys. 539, A28 (2012)> =2012A&A...539A..28G
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry, infrared Keywords: techniques: photometric - binaries: eclipsing - planetary systems - stars: individual: 55 Cnc Abstract: We report on new transit photometry for the super-Earth 55 Cnc e obtained with Warm Spitzer/IRAC at 4.5um. An individual analysis of these new data leads to a planet radius of 2.21+0.15-0.16R{earth}, in good agreement with the values previously derived from the MOST and Spitzer transit discovery data. A global analysis of both Spitzer transit time-series improves the precision on the radius of the planet at 4.5um to 2.20±0.12R{earth}. We also performed an independent analysis of the MOST data, paying particular attention to the influence of the systematic effects of instrumental origin on the derived parameters and errors by including them in a global model instead of performing a preliminary detrending-filtering processing. We deduce from this reanalysis of MOST data an optical planet radius of 2.04±0.15R{earth} that is consistent with our Spitzer infrared radius Description: We monitored 55Cnc with Spitzer on 20 June 2011 from 09h08 to 15h02 UT, corresponding to a transit window of 55Cnc e as computed from our transit ephemeris presented in Demory et al., 2011, Cat. J/A+A/533/A114. Objects: ----------------------------------------- RA (2000) DE Designation(s) ----------------------------------------- 08 52 35.8 +28 19 51 55 Cnc = HR 3522 ----------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file irac1.dat 92 5059 IRAC 4.5 microns time-series photometry, 06/01/2011 irac2.dat 92 6197 IRAC 4.5 microns time-series photometry, 20/06/2011 most1.dat 73 641 *MOST time-series photometry, 07-09/02/2011 most2.dat 73 643 *MOST time-series photometry, 09-11/02/2011 most3.dat 73 652 *MOST time-series photometry, 12-15/02/2011 most4.dat 73 653 *MOST time-series photometry, 15-17/02/2011 most5.dat 73 653 *MOST time-series photometry, 17-19/02/2011
Note on most1.dat, most2.dat, most3.dat, most4.dat, most5.dat: MOST stands for "Microvariability and Oscillations of STars", and is a Canadian microsatellite equipped with a 15 cm telescope and CCD photometer, covering the visible spectrum 350-700nm
See also: J/A+A/533/A114 : Transit of super-Earth 55 Cnc e (Demory+, 2011) Byte-by-byte Description of file: irac1.dat irac2.dat
Bytes Format Units Label Explanations
1- 19 F19.11 d BJD UTC Baselian Julian date 21- 37 F17.15 --- Flux Normalized flux 39- 58 E20.16 --- e_Flux rms uncertainty on Flux 60- 75 F16.13 pix Xpos X position 77- 92 F16.13 pix Ypos Y position
Byte-by-byte Description of file: most?.dat
Bytes Format Units Label Explanations
1- 14 F14.6 d BJD UTC Baselian Julian date 16- 23 F8.6 --- Flux Normalized flux 25- 32 F8.6 --- e_Flux rms uncertainty on Flux 34- 42 F9.6 pix dx Offset in X 44- 52 F9.6 pix dy Offset in Y 54- 63 F10.7 --- Bck Background counts (1) 64- 73 F10.7 --- B Magnetic field (1)
Note (1): The magnetic field is in fact a calculated (not measured) value. The background and magnetic field are not in physical units.
Acknowledgements: Michael Gillon, michael.gillon(at)
(End) Patricia Vannier [CDS] 05-Jan-2012
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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