VLT, GROND, AND DANISH TELESCOPE OBSERVATIONS OF TRANSITS IN THE TRAPPIST-I SYSTEM

Southworth, J.; Mancini, L.; Dominik, M.; Jørgensen, U.G.; Bozza, V.; Burgdorf, M.J.; Figuera Jaimes, R.; Haikala, L.K.; Henning, Th.; Hinse, T.C.; Hundertmark, M.; Longa-Pe˜na, P.; Rabus, M.; Rahvar, S.; Sajadian, S.; Skottfelt, J.; Snodgrass, C.

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.

Citation

Southworth, J., Mancini, L., Dominik, M., Jørgensen, U., Bozza, V., Burgdorf, M., …Snodgrass, C. (2022). VLT, GROND, AND DANISH TELESCOPE OBSERVATIONS OF TRANSITS IN THE TRAPPIST-I SYSTEM. Observatory, 142, 220 - 229

• Acceptance Date: Oct 1, 2022
• Publication Date: Oct 31, 2022
• Publicly Available Date: Nov 1, 2023
• Journal: OBSERVATORY
• Print ISSN: 0029-7704
• Peer Reviewed: Peer Reviewed
• Volume: 142
• Pages: 220 - 229