SN 1990aa Ic in UGC 540

OBJ:  SN 1990aa Ic in UGC 540 (Sb).  See
          UGC 540.
DISCOVERY: 1990sep04 by Perlmutter, Pennypaker et al.
MAX:  1990sep10 +/- 4 in visible from {fillipenko1992}.  
           This day of the year 253.
SUPERNOVA of the YEAR:  27.

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

REF:

       {filippenko1992}
\bibitem[Filippenko(1992)]{filippenko1992}
        Filippenko, A. V. 1992, \apj, 384, L37 
%
        % ADS Reference
        % Early-time spectra of type IC supernovae - Further evidence for the presence of hydrogen.
        % Comparison of the early-time optical spectra of the Type II SN 1985L and the Type Ic SN 1987M 
        % confirms the previously suspected presence of H-alpha in SN 1987M. The H-alpha line has a P Cygni 
        % profile in both objects, but it is not as prominent as in the Type II SN 1987K, whose spectrum 
        % at late times became indistinguishable from that of SNs Ic. A spectrum of the Type Ic SN 1991A 
        % reveals a weak but nearly unmistakable H-alpha emission line; faint H-alpha emission may also be present 
        % in the Type Ic SN 1990aa.

       {filippenko1990}
\bibitem[Filippenko \&~Shields(1990)]{filippenko1990}
        Filippenko, A. V., \&~Shields, J. C. 1990, IAUC 5111 
%IAUC Reference
        % Supernova 1990aa Ic.
        % Reports a 1990sep27 spectrum from 3900--9800 A with 12 A resolution. 


REP:  F_lambda (erg/cm2/s/A) ??? vs. lambda (ang)  (iformat = 1)
COR:  not deredshifted ??? (heliocentric velocity 4981 +/- 7 km/s and 
        v_hel corrected for CMB radiation 4676 km/s from
          UGC 540.
      not dereddened ??? (Galactic foreground .23/4... =.0575
     Schlegel et al. (1998).
      not smoothed ????, not photometric ????
      Derived maximum in some band is  (see above).

OBS:  {filippenko1990} ????.   I got the spectrum from Stefano Benetti, but the note suggests it
      originally came from Alex. 

Date: 1990sep27 (270) with 1990sep10 +/- 4 (253) for visible maximum gives:
      day = 270 - 253 = 17 



&specnamelist
   aname='sn1990aa Ic 1990_09_27'
   ebv=.0575
   epoch=17.          ! This parameter needs to updated for the particular spectrum.
   iformat=1
   itick=2
   itickln=4
   t_rise=20.d0      ! default 
   v_helio=4981.
   ymin2=1.d-17
   ymax2=1.d-12
   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 somewhere. 


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