SPECTRUM LOG:

     JD times for the SN 1990N spectra of various observers.

     Bmax: 1990jul09.40 +/- 0.14 UT (JD 2448081.90 +/- 0.14)  (riess2005).
           1990jul10.2 +/- 0.5 (JD 2448082.7) B (lira1998).

     Some of the spectra are observer frame and some are rest frame. 

     In some cases, we have had to estimate the JD.

     JD Bmax  Heliocentric velocity (Leda, 2007jul04)
     8081.90  982.  
END:
8068.66         ! leibundgut1991  1990jun26.16 3200.--8399.99991 (observed)
0.              !                             Precise JD from CfA FITS header. 
8071.3          ! turatto1995     1990jun28.8  3823.--8047. (observed)
0.              !                             Crude estimate of JD:  -.8/+.2 
8075.49         ! leibundgut1991  1990jun02.99 980.582--7723.596376 (observed) 
0.              !                             Precise JD from CfA FITS header. 
8084.5          ! mazzali1993     1990jul12.0  3750.--8049. (observed)
0.              !                             The FITS JD may be rounded. 
8089.8          ! leibundgut1991  1990jul17.3  3915.--9880. (observed) 
0.              !                             .3 based on Lick Obs. time. 
8099.65         ! CfA SN Archive  1990jul27.15 3187.743--7486.774614
0.              !                             Precise JD from CfA FITS header. 
8103.8          ! filippenko1992c 1990jul31.3  3885.--9880. (observed?)
0.              !                             .3 based on Lick Obs. time. 
8132.8          ! filippenko1992c 1990aug29.3  3885.--9900. (observed?)
0.              !                             .3 based on Lick Obs. time. 
8268.65         ! gomez1996       1991jan12.15 3410.--9787. (rest) 
8309.73         ! gomez1996       1991feb22.23 3402.79--9778.7197 (rest)