SN 1987K IIb in NGC 4651 (Sc)

OBJ:  SN 1987K in NGC 4651 (Sc) in Virgo.  See 
          Leda:   NGC 4651.
DISCOVERY:  1987jul28 by the Berkeley Automated Supernova Search {filippenko1988} 
MAX:  1987jul31 +/- 4 in an ill-defined redside of the optical band (the ``red'' band) {filippenko1988}. 
           This day of the year 213 remembering that 1988 was a leap year.
SUPERNOVA of the YEAR:  11.

HEADER:  D. J. Jeffery (2006jan01).

REF:

       {filippenko1988}
\bibitem[Filippenko(1988)]{filippenko1988}
        Filippenko, A. V. 1988, AJ, 96, 1941
%
        % ADS Reference
        % Supernova 1987K - Type II in youth, type Ib in old age.
        % SN 1987K IIb in NGC 4651.  Alex introduces the name IIb.


REP:  F_nu  ??? vs. lambda (ang)  (iformat = -2)
COR:  deredshifted ??? (heliocentric velocity 799 +/- 2 km/s and 
        v_hel corrected for CMB radiation 1108 km/s from
       Leda:   NGC 4651.
      not dereddened ??? (Galactic foreground 0.12 =.03
     Schlegel et al. (1998)
      not smoothed ????, not photometric ????

OBS:  {filippenko1988}: See his log of observations for the details.

Date: 1987 ( for a leap year) with 1987jul31 (213) for ``red'' maximum gives:
      day =  - 213 =  



&specnamelist
   aname='sn1987k IIb 1987_'
   ebv=.03
   epoch=          ! This parameter needs to updated for the particular spectrum.
   iformat=-2      ! This means in f_nu (the 2) and already deredshifted (the minus). 
   itick=2
   itickln=4
   scale_flux=1.d-11
   t_rise=20.d0      ! default.  Alex actually guess at 20 days {filippenko1988} too. 
   v_helio=799.
   ymin2=.1d0
   ymax2=10.d0
   ymin3=.3
   ymax3=3.
   wlammin1=
   wlammax1=
   wlammin2=
   wlammax2=
   wlammin3=
   wlammax3=
/




      

Postscript plot of the spectrum.




      

Postscript plot of the spectrum with local normalization.




Information from Alex Filippenko.