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A Candidate Transit Event around Proxima Centauri

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arxiv 1712.04483 v1 pith:LOHPHRWD submitted 2017-12-12 astro-ph.EP astro-ph.SR

A Candidate Transit Event around Proxima Centauri

classification astro-ph.EP astro-ph.SR
keywords eventtransitproximaaroundcandidatecentauriplanetassumption
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present a single candidate transit event around Proxima Centauri, found during a blind transit search using a robotic 30\,cm telescope at Las Campanas Observatory. The event lasted 1 hour, with an estimated depth of 5\,mmag, and is inconsistent with the transit window predicted for the recently discovered planet b. We modeled the lightcurve under the assumption that the event was caused by a transiting exoplanet, and our model predicts the planet has a radius $R \sim 1 R_{\oplus}$. We encourage continued monitoring of Proxima to elucidate the origin of this event.

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