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

Brett M. Morris, Eric Agol, Suzanne L. Hawley
(Submitted on 13 Jan 2018)

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 $\mathrm{BJD}_{\mathrm{TDB}} = 2457580.87634^{+0.00034}_{-0.00034}$ and $2457558.89477^{+0.00080}_{-0.00085}$, respectively, which will help constrain the planet masses.

Comments:    1 figure, 2 pages, accepted to RNAAS
Subjects:    Earth and Planetary Astrophysics (astro-ph.EP)
Cite as:    arXiv:1801.04460 [astro-ph.EP] (or arXiv:1801.04460v1 [astro-ph.EP] for this version)
Submission history
From: Brett Morris
[v1] Sat, 13 Jan 2018 16:14:25 GMT (93kb,D)
https://arxiv.org/abs/1801.04460