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J/A+A/608/A26       TrES-3b UBVIz' light curves             (Mackebrandt+, 2017)

Transmission spectroscopy of the hot Jupiter TrES-3b: Disproof of an overly large Rayleigh-like feature. Mackebrandt F., Mallonn M., Ohlert J.M., Granzer T., Lalitha S., Garcia Munoz A., Gibson N.P., Lee J.W., Sozzetti A., Turner J.D., Vanko M., Strassmeier K.G. <Astron. Astrophys. 608, A26 (2017)> =2017A&A...608A..26M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry, UBVRI ; Photometry, SDSS Keywords: planets and satellites: atmospheres - stars: individual: TrES-3 - methods: data analysis - techniques: spectroscopic - techniques: photometric Abstract: Transit events of extrasolar planets offer the opportunity to study the composition of their atmospheres. Previous work on transmission spectroscopy of the close-in gas giant TrES-3 b revealed an increase in absorption towards blue wavelengths of very large amplitude in terms of atmospheric pressure scale heights, too large to be explained by Rayleigh- scattering in the planetary atmosphere. We present a follow-up study of the optical transmission spectrum of the hot Jupiter TrES-3 b to investigate the strong increase in opacity towards short wavelengths found by a previous study. Furthermore, we aim to estimate the effect of stellar spots on the transmission spectrum. This work uses previously published long slit spectroscopy transit data of the Gran Telescopio Canarias (GTC) and published broad band observations as well as new observations in different bands from the near-UV to the near-IR, for a homogeneous transit light curve analysis. Additionally, a long-term photometric monitoring of the TrES-3 host star was performed. Our newly analysed GTC spectroscopic transit observations show a slope of much lower amplitude than previous studies. We conclude from our results the previously reported increasing signal towards short wavelengths is not intrinsic to the TrES-3 system. Furthermore, the broad band spectrum favours a flat spectrum. Long-term photometric monitoring rules out a significant modification of the transmission spectrum by unocculted star spots. Description: We observed transits of the hot Jupiter TrES-3b in Johnson U, B, V, I and Sloan z'. Telescopes are named according to the paper. We monitored the exoplanet host star TrES-3 with STELLA/WiFSIP in 2016 over the course of four months from March 7 to July 10, 2016. We observed in two filters, Johnson B and Johnson V, in blocks of three exposures each. Objects: --------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------- 17 52 07.02 +37 32 46.2 TrES-3 = NAME TrES-3b --------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file list.dat 54 17 List of photometric observations phot/* 108 17 Individual light curve data vamosb.dat 52 28 Light curve from STELLA in Johnson B filter vamosv.dat 52 29 Light curve from STELLA in Johnson V filter
See also: J/AJ/136/267 : Six occultations of the exoplanet TrES-3 (Winn+, 2008) J/ApJ/691/1145 : Spectrophotometry of TrES-3 and TrES-4 (Sozzetti+, 2009) J/MNRAS/408/1494 : Planetary transits of TrES-2 and TrES-3 (Colon+, 2010) J/AJ/145/68 : Five new transit light curves of TrES-3 (Jiang+, 2013) Byte-by-byte Description of file: list.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Band [UBVI z'] Observed band 4- 10 A7 --- PSys [Johnson Sloan] Photometric system of the Band 12- 17 A6 --- Inst Instrument 19- 28 A10 "date" Obs.Date Observation date 30- 32 I3 s-1 Cad Cadence 34- 36 I3 --- Nobs Number of data points 38- 41 F4.2 mmag-1 rms Dispersion of the residuals as root mean square (rms) of the observations after subtracting a transit model 43- 54 A12 --- FileName Name of the table with photometry in subdirectory phot
Byte-by-byte Description of file: phot/*
Bytes Format Units Label Explanations
3- 24 E22.17 d BJD Barycenric corrected modified Julian date (UTC) 29- 39 E11.6 mag dmag Differential magnitude 42- 52 E11.6 mag e_dmag Error of dmag 56- 66 E11.6 pix xposT Target x position on CCD 70- 80 E11.6 pix yposT Target y position on CCD 84- 94 E11.6 --- FWHMT FWHM of target 98-108 E11.6 --- FluxT Flux of the target
Byte-by-byte Description of file: vamos[bv].dat
Bytes Format Units Label Explanations
3- 24 E22.17 d JD Julian date in UTC 28- 39 E12.6 --- Flux Normalized flux 42- 52 E11.6 --- e_Flux Error of Flux
Acknowledgements: Felix Mackebrandt, mackebrandt(at)
(End) Felix Mackebrandt [MPS, Germany], Patricia Vannier [CDS] 27-Sep-2017
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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