VLT, GROND, and Danish telescope observations of transits in the TRAPPIST-1 system
Abstract
TRAPPIST-1 is an ultra-cool dwarf that hosts seven known transiting planets. We present photometry of the system obtained using three telescopes at ESO La Silla (the Danish 1.54-m telescope and the 2.2-m MPI telescope) and Paranal (Unit Telescope 1 of the Very Large Telescope). We obtained 18 light curves from the Danish telescope, eight from the 2.2-m and four from the VLT. From these we measure 25 times of mid-transit for four of the planets (b, c, f, g). These light curves and times of mid-transit will be useful in determining the masses and radii of the planets, which show variations in their transit times due to gravitational interactions.
- Publication:
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The Observatory
- Pub Date:
- October 2022
- DOI:
- 10.48550/arXiv.2207.05874
- arXiv:
- arXiv:2207.05874
- Bibcode:
- 2022Obs...142..220S
- Keywords:
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- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- Accepted for publication in The Observatory Magazine. 11 pages, 3 tables, 3 figures. Version 2 is corrected for the misidentification of the planet causing one of the transits