TESS-Gaia Light Curve: a PSF-based TESS FFI light curve product

Abstract

The Transiting Exoplanet Survey Satellite (TESS) is continuing its second extended mission after 55 sectors of observations. TESS publishes full-frame images (FFI) at a cadence of 1800, 600, or 200 seconds, allowing light curves to be extracted for stars beyond a limited number of pre-selected stars. Simulations show that thousands of exoplanets, eclipsing binaries, variable stars, and other astrophysical transients can be found in these FFI light curves. To obtain high-precision light curves, we forward model the FFI with the effective point spread function to remove contamination from nearby stars. We adopt star positions and magnitudes from Gaia DR3 as priors. The resulting light curves, called TESS-Gaia Light Curves (TGLC), show a photometric precision closely tracking the pre-launch prediction of the noise level. TGLC's photometric precision reaches <~2% at 16th TESS magnitude even in crowded fields. We publish TGLC Aperture and PSF light curves for stars down to 16th TESS magnitude through the Mikulski Archive for Space Telescopes (MAST) for all available sectors and will continue to deliver future light curves via DOI: 10.17909/610m-9474. The open-source package tglc is publicly available to enable any user to produce customized light curves.

23 pages, 13 figures, 4 tables, AJ accepted. Light curves are available at https://archive.stsci.edu/doi/resolve/resolve.html?doi=10.17909/610m-9474 tglc package is pip-installable and available at https://github.com/TeHanHunter/TESS_Gaia_Light_Curve

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• High mass function ellipsoidal variables in the Gaia Focused Product Release: searching for black hole candidates in the binary zoo
• Discovery of Dipolar Chromospheres in Two White Dwarfs
• GEMS JWST: Transmission spectroscopy of TOI-5205b reveals significant stellar contamination and a metal-poor atmosphere
• An upper limit on the frequency of short-period black hole companions to Sun-like stars
• Automated all-sky detection of γ Doradus / δ Scuti hybrids in TESS data from positive unlabelled (PU) learning
• MONOS: Multiplicity Of Northern O-type Spectroscopic systems. III. New orbits and Gaia TESS analysis for 10 SB2E systems
• Hidden oscillations in plain sight: identification of seismically unresolved red-giant asteroseismic binary candidates
• Binarity at LOw Metallicity (BLOeM): massive star variability revealed using a novel software tool for point-spread function fitting of TESS images
• Searching for GEMS: Three warm Saturns and a super-Jupiter orbiting four early M-dwarfs
• Searching for GEMS: TOI-5916 b & TOI-6158 b are two Saturn-density planets orbiting M2 dwarfs