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.
 
 
     Heliocentric velocity     Z redshift
            982.0000000000   0.0032755994
 
     Index     JD of some kind Observer phase     Rest phase
 
         1     8068.6600000000 -13.2400000000 -13.1967726592     ! leibundgut1991  1990jun26.16 3200.--8399.99991 (observed)
         2        0.0000000000******************************     !                             Precise JD from CfA FITS header.
         3     8071.3000000000 -10.6000000000 -10.5653920081     ! turatto1995     1990jun28.8  3823.--8047. (observed)
         4        0.0000000000******************************     !                             Crude estimate of JD:  -.8/+.2
         5     8075.4900000000  -6.4100000000  -6.3890719596     ! leibundgut1991  1990jun02.99 980.582--7723.596376 (observed)
         6        0.0000000000******************************     !                             Precise JD from CfA FITS header.
         7     8084.5000000000   2.6000000000   2.5915112473     ! mazzali1993     1990jul12.0  3750.--8049. (observed)
         8        0.0000000000******************************     !                             The FITS JD may be rounded.
         9     8089.8000000000   7.9000000000   7.8742072513     ! leibundgut1991  1990jul17.3  3915.--9880. (observed)
        10        0.0000000000******************************     !                             .3 based on Lick Obs. time.
        11     8099.6500000000  17.7500000000  17.6920479381     ! CfA SN Archive  1990jul27.15 3187.743--7486.774614
        12        0.0000000000******************************     !                             Precise JD from CfA FITS header.
        13     8103.8000000000  21.9000000000  21.8284985828     ! filippenko1992c 1990jul31.3  3885.--9880. (observed?)
        14        0.0000000000******************************     !                             .3 based on Lick Obs. time.
        15     8132.8000000000  50.9000000000  50.7338163409     ! filippenko1992c 1990aug29.3  3885.--9900. (observed?)
        16        0.0000000000******************************     !                             .3 based on Lick Obs. time.
        17     8268.6500000000 186.7500000000 186.1402790110     ! gomez1996       1991jan12.15 3410.--9787. (rest)
        18     8309.7300000000 227.8300000000 227.0861567179     ! gomez1996       1991feb22.23 3402.79--9778.7197 (rest)