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.

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.

Authors

Dr John Taylor j.k.taylor@keele.ac.uk

L. Mancini

M. Dominik

U.G. Jørgensen

V. Bozza

M.J. Burgdorf

R. Figuera Jaimes

L.K. Haikala

Th. Henning

T.C. Hinse

M. Hundertmark

P. Longa-Pe˜na

M. Rabus

S. Rahvar

S. Sajadian

J. Skottfelt

C. Snodgrass

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.

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