[vsnet-chat 2954] Re: Message suggesting CP Dra deserves closer observation

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

Dear all concerned,

>    The object is listed twice as a possible SN.
>
>101540.0 +732606 (2000.0) SN1904 * N3147 - - - - - D.Isaac-Roberts
>101540.0 +732606 (2000.0) SN1972 * N3147 - - - - - R.Altizer

  According to GCVS (NL59=IBVS 834), CP Dra appears to be recorded by
R. Altizer on IAUC 2381 (probably issued on early 1972) as "supernova
or nova near NGC 3147".  This star has also been noted as "n" in D. 
Roberts (1914), AN, 197, 57.  It seems to be 1904 event, but not
certain (I cannot read them because they are not electrically
accessable).  This "supernova or nova near NGC 3147" is also described
in IAUC 2383 (also not-accessable), which can be the identification of
the nature of the recurrence.  

  Very timely, SN 1972H has occured in this galaxy.  It was discovered
by Goranskij (IAUC 2431, issued on 1972 Aug.), and follow-uped by
several observers.  The atlas of this SN can be seen on Barbon (1973)
A&Ap, 29, 43.  Also, SN 1997bq has occured in this galaxy.

  These two SNe are in the disk (spiral) region of NGC 3147 (offset is
1' or so), while CP Dra is far away: about 5'.7 WNW of the center of
this galaxy (if the GCVS position is correct).  Bruch et al. (1987),
A&ApS 70, 481 tells that Hoffmeister (1966), AN, 289, 139 or
Kolotovkina (1979) Perem. Zvezdy 3, 665 has the other atlas: can you
check them, Taichi?

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp

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