Fig. A.1
2.6 m BAO SCORPIO spectra for DFBS J003700.13+ 342234.0 in the range 4000–5000 Å (upper panel). The 1.93 m OHP CARELEC spectra for DFBS J064958.54+741610.1 in the range 4300 − 7300 Å (lower panel). Because of bad weather conditions, no standard star was observed, therefore this spectrum is not corrected for the CCD response, which explains part of the strong rising of its continuum.
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