TPF of GJ 436 (cross symbol) in TESS Sectors 22 (left) and 49 (right). The electron counts are colour-coded. The TESS optimal photometric aperture per sector used to obtain the SAP fluxes is marked with red squares. The Gaia DR3 sources with G-band magnitudes down to 8 mag fainter than GJ 436 are labeled with numbers (GJ 436 corresponds to number 1) and their scaled brightness based on Gaia magnitudes is shown by red circles of different sizes (see figure inset). The pixel scale is 21 arcsec pixel⁻¹.