A dataset provided by the European Space Agency

Obs ID 2198415
Target/Line-of-sight WASP-77 A b
Gaia DR2 ID GAIA DR2 5178405479960844160
URL https://cheops.unige.ch/archive_browser/?visit-id=2198415
DOI https://doi.org/10.57780/esa-mtymowh
Author European Space Agency
Description of observation
  • Target RA (J2000): 37.155109 °
  • Target Dec (J2000): -7.06066 °
  • Gaia GMag: 10.09

  • Programme ID: CH_PR230016
  • PI of observing programme: Teinturier
  • Title of programme: CHEOPS Phase Curves to Characterize the Clouds Composition of Hot Jupiters
  • Abstract: Observing and modeling efforts have recently been made to begin the atmospheric characterization of It is thought that clouds are ubiquitous in the atmosphere of Hot Jupiter. However, distinguishing between the different kinds of condensates is hard, as degeneracies emerge when analyzing photometric and spectral data. High precision optical phase curves can help disentangle these degeneracies as the peak offset of the optical phase curve is sensitive to the clouds composition. We aim to observe two phase curves of the Hot Jupiter HIP 65A b and three phase curves of the Hot Jupiter WASP-77A b. HIP 65A b has anxa0equilibrium temperature of 1410 K, an orbital period of 0.98 days and a poorly constrained radius between 2.64 and 1.54 RJ.xa0 WASP-77A b has an equilibrium temperature of 1715 K, an orbital period of 1.35 days and a radius of 1.230 RJ.xa0 These observations will allow us to refine the constraints on the planetary radius (in particular for HIP 65A b), to constrain the geometric albedo and potentially to discriminate between different forming clouds. They will also be useful for the preparation and interpretation of future observations by JWST and ARIEL as well as characterizations by high spectral resolution observations by SPIRou or CRIRES.
Temporal Coverage 2023-09-15T20:59:57Z / 2023-09-18T11:34:00Z
Version 3.0
Mission Description CHEOPS (Benz et al., https://doi.org/10.1007/s10686-020-09679-4) is a European Space Agency (ESA) mission in partnership with Switzerland with important contributions to the payload and the ground segment from Austria, Belgium, France, Germany, Hungary, Italy, Portugal, Spain, Sweden and the United Kingdom.

The satellite has a single payload comprising an ultra-high precision photometer covering the 330 - 1100 nm wavelength range in a single photometric band. Observations are made as part of the Guaranteed Time Observing Programme that is formulated by the CHEOPS Science Team, and the Guest Observers Programme through which the Community at large can apply for CHEOPS time.
Creator Contact https://www.cosmos.esa.int/web/cheops/contact
Date Published 2024-12-17T11:32:25Z
Keywords CHEOPS, EXOPLANETS, wide-band photometer
Acknowledgements https://www.cosmos.esa.int/web/cheops-guest-observers-programme/publication-guidelines
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2024, 'WASP-77 A b', 3.0, European Space Agency, https://doi.org/10.57780/esa-mtymowh