Electronic Telegram No. 2243
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Room 209; Dept. of Earth and Planetary
 Sciences; Harvard University; 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbat@iau.org; cbatiau@eps.harvard.edu
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SUPERNOVA 2010bq IN UGC 10547
     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.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
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                         (C) Copyright 2010 CBAT
2010 April 15                    (CBET 2243)              Michael Rudenko