A dataset provided by the European Space Agency

Obs ID 2394618
Target/Line-of-sight An Optical Lever-arm for JWST Spectra of K2-22b
Gaia DR2 ID Gaia DR2 3811002791880297600
URL https://cheops.unige.ch/archive_browser/?visit-id=2394618
DOI https://doi.org/10.57780/esa-3cubpml
Author European Space Agency, Nicholas tusay
Description of observation
  • Target RA (J2000): 169.482818603516 °
  • Target Dec (J2000): 2.61906003952026 °
  • Gaia GMag: 14.93
  • Programme ID: CH_PR440020
  • PI of observing programme: Nicholas tusay
  • Title of programme: An Optical Lever-arm for JWST Spectra of K2-22b
  • Abstract: The disintegrating ultra-short period exoplanet K2-22b offers the opportunity to probe the interior composition of a specific rocky exoplanet for the first time, via the transmission spectrum and phase curve of the dust evaporating from K2-22b obtained with MIRI LRS slitless spectroscopy on JWST, and simultaneous with CHEOPS optical observations. JWST GO program 3315 will observe two transits, as well as a complete phase curve of the orbit from one transit to another, for a total of four transit observations of K2-22b. By comparing the transit transmission spectra to detailed extinction and scattering models, the program aims to determine the mineralogical make-up of the dust outflowing from K2-22b, and therefore the composition of the planets interior. The phase curve data will enable measurement of the temperature and spatial extent of the dust, which will further constrain its morphological properties, as well as the dynamics of the dust-outflow around the planet itself. The relative mineralogical abundances in the dust will provide insight into whether it is crustal, mantle or core material that is evaporating. To complement the JWST observations, we propose to use CHEOPS to get as much simultaneous optical coverage during these observations as the orbital phases will allow. Adding optical data to a MIR detection will enable the breaking of degeneracies in the mineralogical models.
Temporal Coverage 2024-04-26T09:46:53Z / 2024-04-26T20:00:00Z
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 2026-03-05T11:41:42Z
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, Nicholas tusay et al., 2026, 'An Optical Lever-arm for JWST Spectra of K2-22b', 3.0, European Space Agency, https://doi.org/10.57780/esa-3cubpml