VizieR Online Data Catalog: Cluster difference imaging photometric survey. II. (Bouma+, 2020)

We observed four transits with the 0.36m telescope at Observatorio El Sauce, located in the Rio Hurtado Valley in Chile and operated by coauthor P.Evans. The observations were obtained in the Cousins-R band on the nights of 2020 April 1 and 26, the Cousins-I band on the night of 2020 May 21, and the Johnson-B band on the night of 2020 June 14. We observed three transits with the 0.40m Antarctic Search for Transiting Exoplanets (ASTEP) telescope at the Concordia base on the Antarctic Plateau. The focal instrument's dichroic plate splits the beam into a blue wavelength channel for guiding and a non-filtered red science channel roughly matching a Cousins-R transmission curve.

We acquired nine spectra using CHIRON at the SMARTS 1.5m telescope at the Cerro Tololo Inter-American Observatory (CTIO), Chile. Six met our signal-to-noise requirements for radial velocities measurements and stellar parameter extraction. We used CHIRON in its image slicer configuration, yielding a spectral resolution of ~79000 across 415-880nm. TOI837b was monitored with the FEROS echelle spectrograph, mounted on the MPG 2.2m telescope at the European Southern Observatory's (ESO) La Silla Observatory in Chile. FEROS has a resolution of ~48000 across a spectral range of 350-920nm. We acquired 34 spectra over 10 visits of TOI837 using the Veloce spectrograph, mounted on the 3.9m Anglo-Australian Telescope (AAT) at Siding Spring Observatory near Coonabarabran, Australia. The currently operational "Veloce Rosso" channel provides coverage from 600 to 950nm at a spectral resolution of ~80000.

(2 data files).