SIMBAD references

P. Challis and R. J. Foley, Harvard-Smithsonian Center for Astrophysics (CfA), on behalf of the CfA Supernova Group, reports that spectroscopic observations of 2010bq (cf. CBET 2241), obtained on Apr. 15 UT by P. Berlind with the F. L. Whipple Observatory 1.5-m telescope (+ FAST), shows it to be a type-IIn supernova. The H-alpha profile has a narrow emission component with a FWHM of 1000 km/s. There is a narrow H-alpha absorption feature whose minimum is blueshifted relative to the emission by 290 km/s, consistent with a luminous-blue-variable wind. The H-beta feature is similar to the H-alpha feature, but also contains a broader absorption component that extends to about 6000 km/s blueward of the emission line. After correcting for Milky Way reddening of E(B-V) = 0.023, the continuum of SN 2010bq is well fit by a blackbody with a temperature of about 13000 K. At cz = 9290 km/s, SN 2010bq currently has an absolute magnitude of about -18.4. Although there are some spectral similarities to other luminous type-IIn supernovae (see Figure 5 of Smith et al. 2010, Ap.J. 709, 856, for a comparison of several type-IIn supernovae spectra), the current luminosity of 2010bq is consistent with a more typical type-IIn supernova such as SN 1998S. Follow-up observations are encouraged.