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3.- Probing binarity in MWC 148Optical counterpart of point-like TeV source HESS J0632+057Proposed as new γ-ray binary because of variable radio and X-rayemission with similar spectral properties as other 3 γ-ray binariesOptical campaign to search for repeatible variability1) INT/WHT Oct/Dec 2008 at ~100 km/s res.2) Mercator Nov 2009 at 7 km/s res.3) Stella Jan-Apr 2010 ,, ,,B0pe star with broad HeIabsorption lines (v sin i=370 km/s)Typically v sini ~ 0.7-0.8 v crit andv crit ~565 km/s for B0V so i~55-70 ○Absorption lines show radial velocity variations with a few 10 km/samplitude but no clear periodicity
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