Photometric Analysis and Transit Times of TRAPPIST-1 B and C
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 $\mathrm{BJD}_{\mathrm{TDB}} = 2457580.87634^{+0.00034}_{-0.00034}$ and $2457558.89477^{+0.00080}_{-0.00085}$, respectively, which will help constrain the planet masses.
- Publication:
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Research Notes of the American Astronomical Society
- Pub Date:
- January 2018
- DOI:
- 10.3847/2515-5172/aaa6cd
- arXiv:
- arXiv:1801.04460
- Bibcode:
- 2018RNAAS...2...10M
- Keywords:
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- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 1 figure, 2 pages, accepted to RNAAS