Photometric Analysis and Transit Times of TRAPPIST-1 b and c

2018/01/13 by Morris, Brett M., Agol, Eric, Hawley, Suzanne L.
#Earth and Planetary Astrophysics (astro-ph.EP) #FOS: Physical sciences

paper · doi:10.48550/arxiv.1801.04460

Abstract

TRAPPIST-1 hosts seven Earth-sized planets transiting an M8 star. We observed mid-transit times of each of the inner two planets with the Astrophysical Research Consortium (ARC) 3.5 m Telescope at Apache Point Observatory (APO) to help constrain the planet masses with transit timing variations, and we outline a procedure for analyzing transit observations of late-M stars with APO. The transit times of TRAPPIST-1 b and c are BJD_TDB = 2457580.87634^+0.00034_-0.00034 and 2457558.89477^+0.00080_-0.00085, respectively, which will help constrain the planet masses.

Related

• Refining the transit timing and photometric analysis of TRAPPIST-1: Masses, radii, densities, dynamics, and ephemerides
• VLT, GROND and Danish Telescope observations of transits in the TRAPPIST-1 system
• Updated Masses for the TRAPPIST-1 Planets
• Updated forecast for TRAPPIST-1 times of transit for all seven exoplanets incorporating JWST data
• TRAPPIST-1 and its compact system of temperate rocky planets