Left: ISAAC H-band broadband image of TXS 2353−003 convolved with a two-dimensional Gaussian to match the spatial resolution of the Hα + [ NII ] map shown in the right panel. Right: Hα morphology of TXS 2353−003, convolved with a two-dimensional Gaussian to emphasize the morphology of the faint northeastern extension at a spatial resolution of 1.2′′. The color bar shows the contamination to the flux density measured in the broadband filter from Hα line emission in units of 10^-19 erg s^-1 cm^-2 Å^-1 arcsec^-1. Contours show the broadband K-band morphology and are identical to those shown in the left panel. Starting from the outermost contour, the broadband fluxes represented by each contour are 1.1, 1.8, 2.5, and 5.4 × 10^-19 erg s^-1 cm^-2 Å^-1 arcsec^-1 (3, 5, 7, and 15σ in the convolved image, where σ = 3.9 × 10^-20 erg s^-1 cm^-2 Å^-1 arcsec^-1). The circles in the lower left of each panel show the size of the convolved PSF.