Spectroscopic observations are required for AZ cas (mV 9.3)
i'm still trying to catch a spectra, first one i've took was from a brighter B7II star around....
Here are comments from Cezary Galan "Please do not be discouraged (such mistakes do happen and important only "to catch" them early) and try again to obtain spectrum of AZ Cas. It could be difficult, because AZ Cas is about 3 mag fainter than HR 488, however at good weather condition and long exposures it perhaps will be possible to obtain good enough spectum."
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