SPECTROSCOPY OF STARS IN THE GALAXY M-81

We present the results of multiobject spectroscopy of 40 stars in M 81 , which is aimed at searching for SS 433 and LBV candidates. The param eters of the Ha line and the relative intensities of the [Nn] lambda 6 583 and [SII] lambda 6716 lines are given. We identified 15 candidates for LBV stars or supergiants. Based on their luminosities, colors, an d shape of the Ha-emission-line profile, two of these objects (ZH 820 and S 55) can be considered as SS 433 candidates. All of the identifie d candidates should be studied in more detail by slit spectroscopy. We identified nine candidates for supernova remnants (some of them are a lso supergiant and LBV candidates), ten HII regions, two star clusters , and about seven (Galactic) field stars. In M 81, we identified four Xray sources: X-2 and X-3 are sources in star clusters, X-6 is a super nova remnant, and X-8 is a field Me dwarf. The supernova remnant X-6 s hows an anomalously high X-ray luminosity; it may harbor a close binar y system of type Cyg X-l or SS 433. We conclude that M 81 is similar i n luminosity of the brightest blue stars to M 31.