Optical spectra (4000–7500 Å) of PKS 0736+017 obtained with SPOL on three consecutive nights in 2015: February 18 (in red), February 19 (in green), and February 20 (in blue). Due to the absence of photometric conditions on February 19, this spectrum is provided in arbitrary units. For reference, shown in black is a spectrum from a low state of the source (February 9, 2016). The emission lines and telluric features are identified in the spectrum from February 20, 2015.