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.
@article{arxiv.2207.05874,
title = {VLT, GROND and Danish Telescope observations of transits in the TRAPPIST-1 system},
author = {John Southworth and L. Mancini and M. Dominik and U. G. Jørgensen and V. Bozza and M. J. Burgdorf and R. Figuera Jaimes and L. K. Haikala and Th. Henning and T. C. Hinse and M. Hundertmark and P. Longa-Peña and M. Rabus and S. Rahvar and S. Sajadian and J. Skottfelt and C. Snodgrass},
journal= {arXiv preprint arXiv:2207.05874},
year = {2022}
}
Comments
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