Exoplanet Watch

A park ranger at Dinosaur National Monument adjusts a telescope at a night sky program, with a star filled sky behind her. Image credit: NPS

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    Inviting Citizen Scientists to Observe Transiting Exoplanets

    Exoplanet Watch is a citizen science project to observe transiting exoplanets, planets outside of our solar system, with small telescopes. A transiting exoplanet is one that periodically passes in front of its host star, causing the star to slightly dim (~1%). Observing exoplanet transits are important as they allow us to directly measure the planet's radius and composition.

    Exoplanet Watch will:

    • Ensure Efficient Use of Large Telescopes - more accurately predict the next transit event for follow-up with large telescope (e.g., HST, JWST, and ARIEL)
    • Discover New Exoplanets - using transit timing variations to infer the existence of an additional exoplanet in a Extrasolar System
    • Search for Blended Pairs - spatially-resolve a field to confirm the radius of a newly-discovered exoplanet
    • Monitor Stellar Variability - spots and plages of a host star can alter the observed exoplanet's signal
    • Confirm New Exoplanets - can help confirm newly-discovered exoplanets

    Beta Testers Needed

    While Exoplanet Watch is scheduled to officially launch in Summer 2020, we are looking for Beta Testers who can start observing exoplanets and help test our in-house data reduction code, EXOTIC, that will fully reduce raw fits files or pre-reduced data and fit them with a model transit (Fig. 1).

    If interested, please contact project lead Rob Zellem.

    Citizen scientists will observe their own transiting exoplanets reduce and analyze their own data, and then upload their results to the AAVSO Exoplanet Database to share their results with the professional exoplanet community. Exoplanet Watch will then analyze these data to help achieve the science goals above.

    Exoplanet Watch Figure
    (Fig. 1) An example transiting exoplanet observed with a 6-inch (15.24-cm) MicroObservatory telescope in Tucson, AZ, USA. Despite the target being relatively dim (V-mag = 11.44) and inprecise guiding on the target (the target drifted on the focal plane by ~100 pixels over the course of the observation), a single 6-inch telescope can achieve high observational precision (uncertainties on the mid-transit time of 3.44 min and transit depth of 0.0021, a 10.26σ detection).

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    NASA's Universe of Learning materials are based upon work supported by NASA under award number NNX16AC65A to the Space Telescope Science Institute, working in partnership with Caltech/IPAC, Center for Astrophysics | Harvard & Smithsonian, Jet Propulsion Laboratory, and Sonoma State University.

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