[vsnet-alert 1520] SN 1998T in IC 694

[Yamaoka Hitoshi <yamaoka@rc.kyushu-u.ac.jp>]

Dear VSNET-alert subscribers,

   Next to SN 1998S, there appeared another SN in IC 694 in UMa 
(IAUC 6830). The host galaxy is a part of Arp 299 = Markarian 171, and
NGC 3690. SN's location is :
        R.A.  = 11h28m32s
        Decl. = +58o33'.7 (2000.0).
The host galaxy is irregular one, so the nucleus of the host galaxy is
uncertain. SN 1998T is close to a nebular in the host. 

    The spectroscopy shows that SN 1998T is of type Ib, probably near
the maximum. Its magnitudes are: 15.4 on Mar. 3 UT (discovery image), 
14.5 on Mar. 4.3 UT. They are unfiltered CCD magnitudes. Followup
observation are encourged, same as SN 1998S. 

    On the same IAUC, a new specrtoscopy of SN 1998S is also reported
by UCB group. It tells that SN 1998S is peculiar; it shows not only
the H emission but also the He emission line. They comment that it 
resembles to the type II-n event SN 1997eg, and SN 1998S may have a
dence circumstellar gas. It is probable that this SN will be brighten 
in radio or X-ray. To connect with the observations in these wave
length, the optical photometries are very important and urged.

Clear Skies,
Hitoshi Yamaoka, Kyushu Univ., Japan.
yamaoka@rc.kyushu-u.ac.jp

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