NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-21 T18:40:34 PDT
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For refcode 2002IAUC.7920C...1F:
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2002IAUC.7920C...1F Circular No. 7920 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION SUPERNOVAE 2002di AND 2002dk A. V. Filippenko, R. Chornock, and R. J. Foley, University of California, Berkeley, report that inspection of CCD spectra (range 330-1000 nm) obtained on June 17 UT with the Shane 3-m reflector at Lick Observatory reveals that both SN 2002di (IAUC 7917) and SN 2002dk (IAUC 7919) are of type Ia, similar to the peculiar, subluminous SN 1991bg (e.g., Filippenko et al. 1992, A.J. 104, 1543). The Ti II absorption around 420 nm is strong, and the Si II 580-nm absorption is much more prominent than in normal supernovae of type Ia. SN 2002dk is close to maximum brightness, and SN 2002di is somewhat older, perhaps roughly 1 week past maximum. 2002 June 17 (7920) Daniel W. E. Green
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