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[vsnet-campaign-sn 193] SN 2001bq in NGC 5534
Dear SN watchers,
IAUC 7628 informed the discovery of a bright SN by a Japanese
amateur K. Itagaki. It is his first discovery of SN.
Congraturations, Itagaki-san!
A new object is found on May 17.587 UT when it was mag 15.9 (CCD).
It locates at R.A. = 14h17m42s.14, Decl. = -7o25'00".7 (2000.0), which
is about 28" east and 2" north of the "nucleus" of the spiral
((R')SAB(s)ab pec:) galaxy NGC 5534. NGC 5534 is consisted by a
spiral galaxy colliding with smaller galaxies, the biggest of which is
located on about 25" due east of the main spiral. Then, SN 2001bq is
superimposed on this interacting companion. The nucleus of this
companion galaxy is ambiguious, but SN is located some (about 4")
east-northeast of the brightest part of this companion galaxy.
Smaller companion galaxies (or condensations in the main spiral
galaxy) are also seen.
The KAIT team reports the prediscovery magnitudes as mag about 16.0
on May 10.3 and about 15.3 on May 14.3, and M. Schwartz reports that
it was below mag about 19.5 on Apr. 29.3. These magnitudes suggest
that SN 2001bq is not a old object, probably near (or before) its
maximum light. Assuming that the resession velocity (v_r) of the host
galaxy (2633 km/s on NED) is due to the Hubble flow, the expected
maximum of the typical SN Ia is about 14.5, but the distance
conversion from such a small v_r is very uncertain. The follow-up
photometry and the spectral confirmation is surely encouraged.
Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp
vsnet-adm@kusastro.kyoto-u.ac.jp
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