Stellar Parameters and Absolute Velocities of all TESS recon spectra from TRES and FIES

The Tillinghast Reflector Echelle Spectrograph (TRES) is a fiber-fed optical spectrograph with a resolution of 44,000. TRES is a workhorse for recon spectroscopy as part of the TESS Follow-up Observing Program (TFOP). To date, over 4000 spectra of over 1700 TOIs have been obtained with TRES. In addition, over 200 TOIs have been observed with the Fiber-fed Echelle Spectrograph (FIES). These spectra are carefully examined to search for possible false positives such as double-lined spectra or targets that show large velocity variation indicating a stellar companion. The spectra are also used to derive stellar parameters using the Stellar Parameter Classification (SPC) tool. Extracted spectra along with quick-look stellar classification plots from the TRES pipeline are uploaded to ExoFOP weekly to encourage community collaboration. A full SPC analysis is able to provide effective temperature, surface gravity, projected rotational velocity and metallicity. A quality flag indicator has also been applied to the classifications based on the quality of the data and the stellar type/parameters. These parameters are be uploaded to ExoFOP on a monthly basis. TRES absolute radial velocities are determined by applying a standard star correction and a correction based on observations of the monitoring of minor planets. Absolute velocities are available by request and will be uploaded to ExoFOP soon!