SN 1994D Ia in NGC 4526 (S0)

OBJECT:  SN 1994D Ia in NGC 4526 (S0).  In Leda it is
         NGC 4526 (Leda).
DISCOVERY:  1994mar07 by Treffers et al. 
            CfA Supernova List.
MAXIMUM:  1994mar21.0 (JD 2449432.5) in B according (patat1996, p. 114;  miekle1996, p. 267).  
          See the US Navy Observatory Julian Date Converter.
          This day of the year 80.
SUPERNOVA of the YEAR:  4.

HEADER:  Header Common header information for this supernovae.
         The common header may (or may not) be updated relative to the header information here. 
         (D. J. Jeffery (2007jan01)).

COMMENTS:  This is a core normal (CN) SN Ia.

           The meikle1996 spectra must have been downloaded from Peter Meikle in 1997 or about then.
           So they come after the paper and may be better?

SPECTROSCOPY LOG:

         Spectrum               Date                  Phase relative to Bmax        Wavelength Range
         ? DB files: 94D_12.    1994mar09             -12                           3196--7372  (rest?)
         ?{patat1996}           1994mar10             -10.8                         2989--7149  (observed)
         ?{patat1996}           1994mar11              -9.6                         3485--7144  (observed)
         {patat1996}            1994mar12              -8.7                         3779--8570  (observed)
         ? DB files:  94D_8.    1994mar13              -8                           3944--8787  (rest?)
         {meikle1996}           1994mar14              -7                           3858.74--6816.29 (observed)
         {patat1996}            1994mar16              -4.8                         3331--10270  (observed)
         {patat1996}            1994mar17              -3.8                         2999.15759456--10549.15759456  (observed)
         ? DB files:  94D_n3.   1994mar18              -3                           3120--9900  (rest?)
         ?{patat1996}           1994mar19              -1.8                         3402.35--9132.35  (observed)
         {meikle1996}           1994mar20              -1                           3007--11116 (observed)
         {branch1996}           1994mar20              -1                           3500--10000 (rest) SYNOW
         {patat1996}            1994mar23               2.2                         3466--9204  (observed)
         {patat1996}            1994mar28               7.2                         4403.4--7013.4  (observed)
         {meikle1996}           1994apr02              12                           3206--10738 (observed)
         {patat1996}            1994apr09              19.2                         3595.04--7459.04 (observed)
         filippenko1997a        1994jun16              87                           3170.000--10500.00 (observed)
         {meikle1996}           1994dec29             283                           3412--9034 (observed)

REFERENCES:

       branch2005 Synthetic spectra for SN 1994D

       branch2006 Synthetic spectra for
          SNe Ia at maximum light.

       CfA List of Supernovae
       where SN 1994D is noted.

       CfA Supernova Archive
       For SN 1994D, there is 0 spectra and 0 photometry.  After I left, the gang were just totally lost for awhile. 

       conley2006 General value
       of 19.4 days for Ia rise time in B.

       filippenko1997a
       According to Filippenko (1997, p. 318)
       Alex shows some 94D spectra of probably of his own and these may be some 
       of the ones I have.

       filippenko1997 There are some
       94D spectra on p. 318.  Some are patat1996 spectra and some may be Alex's own, but there is 
       no day 87 spectrum there.

       gomez1996 2 postmaximum 94 spectra.

       meikle1996
       % An early-time infrared and optical study of the Type IA supernovae SN 1994D and 1991T.

       patat1996
       The type IA supernova 1994D in NGC 4526: the early phases
       B max on 1994mar21.

       paturel2003 (Leda) Leda refererence.

       richmond1995
       UBVRI Photometry of the Type IA SN 1994D in NGC 4526

       SUSPECT Index.

       SUSPECT Index:  SN 1994D Ia.
       There are 31 SN 1994D spectra all from patat1996 and gomez1996.

CORRECTIONS:  Heliocentric velocity 602 +/- 26 km/s (2007jul10) and 
              v_heliocentric corrected for CMB radiation 932 km/s from
              NGC 4526 (Leda).
              Actually NED claims the heliocentric velocity is 448 +/- 8 km/s.  So who is right.
              See NED.
              I'll trust Leda just for consistency.
              Galactic foreground .10/4... =.025 from 
              NGC 4526 (Leda).
              This is dervived from 
              Schlegel et al. (1998).



OBSERVATIONS:  From  
               1) Alex Filippenko group.
               2) patat1996 or Asiago group.  These can be downloaded from SUSPECT
               3) gomez1996.  These can be downloaded from SUSPECT
               4) Meikle group
               5) Eddie Baron has Filippenko and Meikle group spectra and some from Brian Schmidt in FITS format.
               6) David Branch has a bunch in /home/branch/synow/94D, but where from?
        

&specnamelist
   aname='sn1994d Ia 1994_'
   ebv=.025
   epoch=              ! This parameter needs to updated for the particular spectrum.
   idifmake=0
   iformat=1           ! This has to be checked for every spectrum. 
   ismooth=0
   itick=2
   itickln=4
   t_rise=19.4d0       ! From {conley2006} 
   v_helio=602.    
   ymin2=1.e-16        ! Remember, SM has trouble with large logarithmic range and itick=2.
   ymax2=1.e-13
   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. 

FITS: Fits format information from the observers if there is any.

END: