Ks band secondary eclipses of WASP-19b and WASP-43b with the Anglo-Australian Telescope

Abstract

We report new Ks band secondary eclipse observations for the hot-Jupiters WASP-19b and WASP-43b. Using the IRIS2 infrared camera on the Anglo-Australian Telescope (AAT), we measured significant secondary eclipses for both planets, with depths of 0.287 -0.020/+0.020% and 0.181 -0.027/+0.027% for WASP-19b and WASP-43b respectively. We compare the observations to atmosphere models from the VSTAR line-by-line radiative transfer code, and examine the effect of C/O abundance, top layer haze, and metallicities on the observed spectra. We performed a series of signal injection and recovery exercises on the observed light curves to explore the detection thresholds of the AAT+IRIS2 facility. We find that the optimal photometric precision is achieved for targets brighter than Kmag = 9, for which eclipses as shallow as 0.05% are detectable at >5 sigma significance.

Accepted for publication in MNRAS, 13 pages, 10 figures

References in corpus (14)

• Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
• Detection of Thermal Emission from an Extrasolar Planet
• Detection of atmospheric haze on an extrasolar planet: The 0.55 - 1.05 micron transmission spectrum of HD189733b with the Hubble Space Telescope
• The Transit Light Curve Project. IX. Evidence for a Smaller Radius of the Exoplanet XO-3b
• The Broadband Infrared Emission Spectrum of the Exoplanet HD 189733b
• Re-Evaluating WASP-12b: Strong Emission at 2.315 micron, Deeper Occultations, and an Isothermal Atmosphere
• Atmospheric Characterization of the Hot Jupiter Kepler-13Ab
• Ground-based secondary eclipse detection of the very-hot Jupiter OGLE-TR-56b
• A photometric study of the hot exoplanet WASP-19b
• z'-band Ground-Based Detection of the Secondary Eclipse of WASP-19b
• Ground-based K-band detection of thermal emission from the exoplanet TrES-3b
• The GROUSE project III: Ks-band observations of the thermal emission from WASP-33b
• Observed spectral energy distribution of the thermal emission from the dayside of WASP-46b
• Ground-based detection of the near-infrared emission from the dayside of WASP-5b

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• $TESS$ Phase Curve of the Hot Jupiter WASP-19b
• High-precision multi-wavelength eclipse photometry of the ultra-hot gas giant exoplanet WASP-103 b
• A Bright Short Period M-M Eclipsing Binary from the KELT Survey: Magnetic Activity and the Mass-Radius Relationship for M-dwarfs
• Evidence of apsidal motion and a possible co-moving companion star detected in the WASP-19 system
• A survey of eight hot Jupiters in secondary eclipse using WIRCam at CFHT
• Colour-colour and colour-magnitude diagrams for Hot Jupiters
• Secondary eclipses of WASP-18b -- Near Infrared observations with the Anglo Australian Telescope, the Magellan Clay Telescope and the LCOGT network
• TESS Unveils the Full Phase Curve of WASP-19b
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