Spectra of the objects with ID numbers 1, 19, and 4 from Table A.1 (see also Fig. A.1). The right panel shows a zoomed-in view of the spectra region around Hα. The green lines indicate the wavelength of Hα at the redshift of NGC 1052 (z = 0.005, Table 1). The magenta lines in the first and second panels indicate the wavelength of Hα at the corresponding redshift (see text for details).