2011CBET.2776....3Y

M. Yamanaka and R. Itoh, Hiroshima University, report that they obtained a low-resolution optical spectrum (R = 400) of PSN J11183170+5758372 = SN 2011eh on July 30.6 UT at the Higashi-Hiroshima Observatory of Hiroshima University. The spectrum shows the absorption line of Si II at 620 nm, O I at 750 nm, and the Ca II infrared triplet at 820 nm, whose lines velocities reach 10000, 14000, and 14000 km/s, respectively. The spectrum also exhibits Si II absorption lines around 580 nm. The intensity ratio of Si II absorption lines at 580 nm to 610 nm is comparable of that seen for SN 1991bg. These profiles are similar to those of the subluminous type-Ia supernova 1991bg at maximum.