Hα emission at the FRB location. Upper: FRB20191001A host emission integrated at the narrow band encompassing Hα using the same wavelength range as shown in the bottom panel. The blue circle is centered at the FRB localization and has a radius of 0.4″, and the dashed black ellipse represents the actual FRB position uncertainty. Lower: Integrated spectrum of the Hα emission within the blue circle (orange). We fit this emission with a Gaussian (dashed blue) plus a continuum (green).