[ascl:2506.004]
TESS-cont: TESS contamination tool
Castro-González, A.;
Lillo-Box, J.;
Armstrong, D. J.;
Acuña, L.;
Aguichine, A.;
Bourrier, V.;
Gandhi, S.;
Sousa, S. G.;
Delgado-Mena, E.;
Moya, A.;
Adibekyan, V.;
Correia, A. C. M.;
Barrado, D.;
Damasso, M.;
Winn, J. N.;
Santos, N. C.;
Barkaoui, K.;
Barros, S. C. C.;
Benkhaldoun, Z.;
Bouchy, F.;
Briceño, C.;
Caldwell, D. A.;
Collins, K. A.;
Essack, Z.;
Ghachoui, M.;
Gillon, M.;
Hounsell, R.;
Jehin, E.;
Jenkins, J. M.;
Keniger, M. A. F.;
Law, N.;
Mann, A. W.;
Nielsen, L. D.;
Pozuelos, F. J.;
Schanche, N.;
Seager, S.;
Tan, T. -G.;
Timmermans, M.;
Villaseñor, J.;
Watkins, C. N.;
Ziegler, C.
TESS-cont quantifies the flux fraction coming from nearby stars in the TESS photometric aperture of any observed target. The package identifies the main contaminant Gaia DR2/DR3 sources, quantifies their individual and total flux contributions to the aperture, and determines whether any of these stars could be the origin of the observed transit and variability signals. Written in Python, TESS-cont is based on building the pixel response functions (PRFs) of nearby Gaia sources and computing their flux distributions across the TESS Target Pixel Files (TPFs) or Full Frame Images (FFIs).