VizieR Online Data Catalog: TESS and NGTS LCs and RVs of NGTS-11 (Gill+, 2020)

The K-dwarf TIC-54002556 (NGTS-11, T=11.62) was observed at a 30min cadence with TESS Camera 1 in Sector 3 of the mission (2018/Sep/20 - 2018/Oct/18). See Section 2.1.

We used the Next Generation Transit Survey (NGTS) facility (see NGTS project; Wheatley+ 2018MNRAS.475.4476W) located at the ESO Paranal Observatory in Chile to monitor NGTS-11 photometrically. We started monitoring NGTS-11 with a single NGTS telescope on the night of 2019 August 11. We observed NGTS-11 for 79 nights (105642 exposures) before a second transit event was detected (ΔlogL=364) on the UT night of 2019 October 24. The transit event was centered at JD 2458780.712, which is 390 days after the initial TESS single-transit. See Section 2.2.

Following the NGTS transit detection, we immediately began radial-velocity follow-up using the CORALIE fiber-fed Echelle spectrograph installed on the 1.2m Leonard Euler telescope at the ESO La Silla Observatory. We made three 600s observations of NGTS-11 over 54 days (2019 October 29, November 28, and December 25), the first just 5 days after the NGTS transit detection. Those observations were followed by an additional nine 1800s radial-velocity measurements spanning 63 days with the HARPS spectrograph (R=115000) on the 3.6m ESO telescope, and six measurements spanning 11 days with the FEROS spectrograph (R=48000) on the MPG/ESO 2.2m Telescope. See Section 2.4.

(5 data files).