A dataset provided by the European Space Agency

Obs ID 2497345
Target/Line-of-sight Treating exoplanets as planets: a deep dive into the reflective properties of an ultra-hot Jupiter
Gaia DR2 ID Gaia DR2 1744911763437512064
URL https://cheops.unige.ch/archive_browser/?visit-id=2497345
DOI https://doi.org/10.57780/esa-d8tj01t
Author European Space Agency, Matthew hooton
Description of observation
  • Target RA (J2000): 317.551544189453 °
  • Target Dec (J2000): 10.7388696670532 °
  • Gaia GMag: 8.242
  • Programme ID: CH_PR240011
  • PI of observing programme: Matthew hooton
  • Title of programme: Treating exoplanets as planets: a deep dive into the reflective properties of an ultra-hot Jupiter
  • Abstract: Designing observations to bridge the gap between our wealth of knowledge about solar system bodies with our relative dearth of knowledge about the composition of exoplanets is one of the biggest challenges of our age. Most studies of the reflected properties of transiting exoplanets have been limited to measurements of geometric albedo, an important but incomplete part of the global picture. We propose to supplement previous TESS and Spitzer full-phase curves of MASCARA-1b by acquiring two CHEOPS full-phase curves. Ultra-hot Jupiters like MASCARA-1b are expected to radiate like blackbodies, simplifying the separation of thermal and reflected signals in the phase curve. This will allow us to measure the phase integral, geometric albedo, spherical albedo and Bond albedo separately for three bandpasses across the optical and infrared. As knowledge of these parameters can be used to discriminate between the dominant scattering mechanism during the orbit, this will constitute one of the most in-depth studies of the reflective properties of a transiting exoplanet to date. Additionally, the transit will be used to search for evidence of nodal precession in the orbit of MASCARA-1b, which if detected will yield information about tidal interactions between the planet and star.
Temporal Coverage 2024-07-23T03:06:00Z / 2024-07-25T19:09:00Z
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 2026-03-05T11:41:46Z
Keywords CHEOPS exoplanet data, ESA CHEOPS mission dataset, exoplanet transit photometry data, high-precision space photometry observations, exoplanet light curves dataset, ultra-high precision stellar photometry, transit depth measurements, exoplanet radius determination data, time-series photometric observations, short-cadence photometry dataset, CHEOPS calibrated level 2 data, aperture photometry space data, stellar variability monitoring data, transiting exoplanet observations, hot Jupiter transit photometry, super-Earth transit data, exoplanet ephemeris refinement observations, phase curve photometry dataset, space-based optical photometry, visible wavelength exoplanet data, FITS light curve files, flux time-series exoplanet data, CHEOPS observation ID dataset, exoplanet follow-up observations, stellar host characterization photometry, ESA CHEOPS science archive data, precision transit timing measurements
Acknowledgements https://www.cosmos.esa.int/web/cheops-guest-observers-programme/publication-guidelines
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Matthew hooton et al., 2026, 'Treating exoplanets as planets: a deep dive into the reflective properties of an ultra-hot Jupiter', 3.0, European Space Agency, https://doi.org/10.57780/esa-d8tj01t