Strong Lines in type1a supernova near maximum light
       ---------- ------------------------------------------

The following list gives some of the important lines in type1a
supenova spectra.  The values in the list are:

  lambda   = line rest-wavelength, 
  gf       = oscillator strength,
  E_lower  = excitation energy.

The strength of each line is proportional to its oscillator strength:
gf, a number that is determined by the atomic physics of the
transition.  E_lower denotes the energy needed to excite the atom into
the lower level of the transition.  If the atmosphere is in
thermodynamic equillibrium (often not too bad a guess), then the
strength of the line is porportional to exp(-E_lower/kT) where
k=boltzman constant and T is the temperature of the atmosphere.  Thus
the relative strength of the lines can be gauged as: 

Line strength ~gf*exp(-E_lower/kT)

Brackets (] and }) denote lines that are close enough together that
they will blend into a single feature.  A good single wavelength to
use for these blends is to take the mean wavelength of all
contributing lines, weighted by their gf values.  Stars (*) denote
lines (or blends of lines) that form clear, distinct spectral features
in the spectrum.

Elem  wavelength     gf        E_lower(eV)  comment/name
---------------------------------------------------------
SiII:
      3853.66    0.0304089      6.85795
      3856.02     0.277332      6.85991
      3862.59     0.152405      6.85795
      4128.05      2.07014      9.83738
      4130.89      2.99226      9.83943
      5041.02      1.95434      10.0671
      5055.98      3.91742      10.0746
      5957.56*    0.500035      10.0671  ] small line in SiII ratio 
      5978.93*     1.00925      10.0746  ]
      6347.11*     1.98153      8.12157  }
      6371.37*    0.993116      8.12157  } SiII '6150' doublet

CaII:
      3933.66*     1.36144      0.00000  ]  CaII H and
      3968.47*    0.682339      0.00000  ]       K
      8498.02*   0.0487528      1.69252  }
      8542.09*    0.434510      1.70005  }  IR triplet
      8662.14*    0.238232      1.69252  }

SII:
      4815.55      1.50314      13.6725
      4924.11     0.872971      13.6183
      5032.43      1.91426      13.6725
      5428.65     0.972747      13.5847
      5432.80*     2.04644      13.6183  }
      5453.85*     3.60579      13.6725  }
      5473.61*    0.755092      13.5847  }
      5606.15*     1.43219      13.7342  ]
      5640.35*     1.40281      13.7023  ]


FeII:
      4173.46   0.00660693      2.58284
      4233.17   0.01000000      2.58284
      4351.77   0.00794328      2.70453
      4549.47    0.0177828      2.82832
      4583.84   0.00954993      2.80684
      4923.93*   0.0478630      2.89121
      5018.44*   0.0602560      2.89121
      5169.03*    0.134896      2.89121

OI:
      7771.94*     2.10863      9.14671  ]
      7774.17*     1.49279      9.14671  ]
      7775.39*    0.899498      9.14671  ]
      8446.25     0.301995      9.52201  }
      8446.36      1.47911      9.52201  }
      8446.76     0.891251      9.52201  }
      9260.85      1.20226      10.7409  ]
      9262.67      1.58489      10.7412  ]
      9262.78      2.51189      10.7412  ]
      9265.93      1.25893      10.7417  ]
      9266.01      4.89779      10.7417  ]

MgII:
      4481.13*     5.49541      8.86425  ]
      4481.15*    0.275423      8.86425  ]
      4481.33*     3.89045      8.86436  ]
      7877.05      2.45471      9.99622  }
      7896.37      4.46684      10.0000  }
      9218.25      1.86209      8.65529  ]
      9244.27     0.933254      8.65529  ]

NaI:
      5889.95*     1.30918      0.00000   ]  Sodium D line
      5895.92*    0.654636      0.00000   ]