[vsnet-alert 448] SN 1996ai

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

Dear Colleagues,

  Recent IAUC reports that the SN 1996ai in NGC 5005 is of type Ia.
From its spectra, it is suggested to be around the maximum phase now 
and extremely obscurred, but the possibility that the SN 1996ai is 
the peculiar type Ia event has not been excluded. It may be cleared 
by R or I band photometry, in which it should be brighter than in 
the bluer bands. The I-band light curve differs between the 'standard'
SN Ia and the peculiar one. 

  NGC 5005 has the distance module m-M = 31.64, from which the peek 
magnitude for 'standard' SN Ia is delived as nearly V = 12 mag. If 
the E(B-V) values announced in IAUCs (greater than or equal to 1.0) 
is correct, V magnitude will not exceed 15 mag, but the I magnitude 
should be 13 -- 14 at the maximum. 

  Its position is; R.A. = 13h10m58s.13, Decl. = +37o03'35".4 (equinox 
2000.0) which is about 24" east and 4" north of the NGC 5005's center.

  Photometric observations are enourmously encourged! If there are 
good sequence of reference stars, please announce it here. Prof. Skiff 
has been posted the V magnitudes for near field stars to 'vsnet-obs', 
which may help the comparison. 

Refs: IAUC 6422, 6423.

Hitoshi Yamaoka, Kyushu Univ., Japan.

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