SN 1983N Ib in M83 (NGC 5236, SBc)

OBJ:  SN 1983N Ib in M83 (NGC 5236, SBc).  See 
          Leda: M83 (NGC 5236, SBc).
DISCOVERY:  ? 
MAX:  1983jul17 in approximately V from \citet{harkness1987, panagia1987}.
           This day of the year 198. 
SUPERNOVA of the YEAR:  14.  

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

REF:

       {gaskell1986}
\bibitem[Gaskell et al.(1986)]{gaskell1986} Gaskell, C. M., Cappellaro, E., Dinerstein, H. L., Garnett, D. R., 
       Harkness, R. P., \&~Wheeler, J. C. 1986, \apj, 306, L77 
%  
%      ADS reference.
       % Type Ib supernovae 1983n and 1985f - Oxygen-rich late time spectra.
       % On SN 1983N in NGC 5236 (M83) and SN 1984L Ib in NGC 991.

       {graham1986}
\bibitem[Graham et al.(1986)]{graham1986} 
       Graham, J. R., Meikle, W. P. S., Allen, D. A., Longmore, A. J., \&~Williams, P. M.  1986, MNRAS, 218, 93
%  
%      ADS reference.
       % Discovery of a large mass of iron in a type I supernova.  They mean 83N.
       % On SN 1983N in NGC 5236 (M83) and SN 1984L Ib in NGC 991.


       {harkness1987}
\bibitem[Harkness et al.(1987)]{harkness1987} Harkness, R. P., et al. 1987, \apj, 317, 355
%  ADS reference.
       % On SN 1983N in NGC 5236 (M83) and SN 1984L Ib in NGC 991.
       % The early spectral phase of type Ib supernovae - Evidence for helium.
       % 11 authors.

       {panagia1987}
\bibitem[Panagia et al.(1987)]{panagia1987}
        Panagia, N. et al.  1987, preprint 
        % This is the infamous unpublished preprint on SN 1983N Ib in  NGC 5236 (M83).
        % Lightcurves and spectra I suppose.
        % It was never published or finished, but it circulated as a preprint and was
        % widely cited.  Some folks may have copies of it.
        % I asked Nino about why this paper was never finished, and he said something about
        % time passing.


REP:  F_lambda ??? vs. lambda (ang)  (iformat = 1)
COR:  deredshifted ??? (heliocentric velocity 507 +/- 3 and 
        v_hel corrected for CMB radiation 780 km/s from
       Leda: M83 (NGC 5236, SBc).
      not dereddened (Galactic foreground .29/4 =.0725
    Schlegel et al. (1998).
      not smoothed, very not photometric,
      Estimated V maximum is 1983jul17 (see above).

OBS:  ????

Date: 1983 () with 1983jul17 (198) for V maximum gives:
      day =  - 198 =  



&specnamelist
   aname='sn1983n Ib  1983_'
   ebv=.0725
   epoch=          ! This parameter needs to updated for the particular spectrum.
   iformat=1
   itick=2
   itickln=4
   t_rise=20.d0      ! default 
   v_helio=507.        
   ymin2=.2
   ymax2=2.
   ymin3=.8
   ymax3=1.2
   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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