2009CBET.1858....1F

R. J. Foley, Harvard-Smithsonian Center for Astrophysics, reports that a CCD spectrum (range 305-1000 nm), obtained on June 24 UT with the 6.5-m Magellan Clay telescope (+ MagE), shows that 2009gj (cf. CBET 1856) is a type-IIb supernova. The spectrum is similar to that of SN 1993J at about three weeks after explosion. Adopting a redshift of 1750 km/s (measured from Na D absorption), the H_alpha P-Cyg absorption minimum is blueshifted by 13000 km/s.