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J/A+A/608/A120  GJ 1214b optical and near-IR transit phot.  (Angerhausen+, 2017)

Simultaneous multicolour optical and near-IR transit photometry of GJ 1214b with SOFIA. Angerhausen D., Dreyer C., Placek B., Csizmadia Sz., Eigmueller P., Godolt M., Kitzmann D., Mallonn M., Becklin E., Collins P., Dunham E.W., Grenfell J.L., Hamilton R.T., Kabath P., Logsdon S.E., Mandell A., Mandushev G., McElwain M., McLean I.S., Pfueller E., Rauer H., Savage M., Shenoy S., Vacca W.D., Van Cleve J.E., Wiedemann M., Wolf J. <Astron. Astrophys. 608, A120 (2017)> =2017A&A...608A.120A (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry, SDSS ; Photometry, infrared Keywords: planets and satellites: individual: GJ 1214b - planets and satellites: atmospheres - techniques: photometric - methods: observational - methods: data analysis - stars: activity Abstract: The benchmark exoplanet GJ 1214b is one of the best studied transiting planets in the transition zone between rocky Earth-sized planets and gas or ice giants. This class of super-Earth or mini-Neptune planets is unknown in our solar system, yet is one of the most frequently detected classes of exoplanets. Understanding the transition from rocky to gaseous planets is a crucial step in the exploration of extrasolar planetary systems, in particular with regard to the potential habitability of this class of planets. GJ 1214b has already been studied in detail from various platforms at many different wavelengths. Our airborne observations with the Stratospheric Observatory for Infrared Astronomy (SOFIA) add information in the Paschen-αcont. 1.9um infrared wavelength band, which is not accessible by any other current ground- or space-based instrument due to telluric absorption or limited spectral coverage. We used FLIPO, the combination of the High-speed Imaging Photometer for Occultations (HIPO) and the First Light Infrared TEst CAMera (FLITECAM) and the Focal Plane Imager (FPI+) on SOFIA to comprehensively analyse the transmission signal of the possible water-world GJ 1214b through photometric observations during transit in three optical and one infrared channels. We present four simultaneous light curves and corresponding transit depths in three optical and one infrared channel, which we compare to previous observations and current synthetic atmospheric models of GJ 1214b. The final precision in transit depth is between 1.5 and 2.5 times the theoretical photon noise limit, not sensitive enough to constrain the theoretical models any better than previous observations. This is the first exoplanet observation with SOFIA that uses its full set of instruments available to exoplanet spectrophotometry. Therefore we use these results to evaluate SOFIAs potential in this field and suggest future improvements. Description: The joint US-German Cycle 2 Guest Investigator (GI) programme - US-proposal: Angerhausen (2013); Germanproposal: Dreyer (2013) - was performed on SOFIAs flight number 149 on UT February 27, 2014. Observations were simultaneously conducted in two optical HIPO channels: open blue at 0.3-0.6um and Sloan z' at 0.9-m; and one infrared FLITECAM fiter: Paschen-α cont. at 1.9um. Complementary data were also obtained with the optical focal plane guiding camera FPI+ in the Sloan i' band (0.8um). Objects: ------------------------------------------------ RA (2000) DE Designation(s) ------------------------------------------------ 17 15 18.94 +04 57 49.7 GJ 1214 = LHS 3275 ------------------------------------------------ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 60 4 Observation summary hipoblue.dat 15 434 SOFIA GJ1214 HIPO blue (open blue) data hipored.dat 15 436 SOFIA GJ1214 HIPO red (SDSS z') data fpip.dat 15 4425 SOFIA GJ1214 HIPO FPI (SDSS i') data flitecam.dat 15 255 SOFIA GJ1214 HIPO FLITECAM (Pa α cont.) data
See also: J/A+A/549/A10 : Transits of GJ 1214 (Harpsoe+, 2013) J/A+A/563/A21 : GJ 1214 Trappist and Spitzer light curves (Gillon+, 2014) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Inst Instrument designation 11- 26 A16 --- Band Pass-band designation (1) 28- 31 F4.2 um lambdaEff Effective wavelength or lower value of effective wavelength interval (1) 32 A1 --- --- [-] 33- 35 F3.1 um BlambdaEff ? Upper value of effective wavelength interval 37- 40 F4.2 um Width Band width 42- 47 A6 s ExpTime Exposure time 49- 60 A12 --- FileName Name of the file with photometry
Note (1): taken from Sofia Observer's Handbook for Cycle 2: v2.1.2 .
Byte-by-byte Description of file: hipoblue.dat hipored.dat fpip.dat flitecam.dat
Bytes Format Units Label Explanations
1- 7 F7.5 d HJD Heliocentric Julian date (HJD-2456715) 9- 15 F7.5 --- RFlux Relative flux
Acknowledgements: Daniel Angerhausen, daniel.angerhausen(at)gmail.com
(End) Patricia Vannier [CDS] 11-Dec-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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