From kawabata@subaru.naoj.org Mon Mar 04 12:07:18 2002

I02ddCAL.xy : Flux data (dd=08, 09, 10, 11; obs date)
They are scaled as the flux at 5550A corresponds to the
CCD photometry by Lew Cook (VSNET).
http://www.astr.tohoku.ac.jp/~kawabata/sn2002/VMAGEST.jpg
I have not corrected for strong atmospheric absorption
around 6900 and 7600A due to O_2 and interstellar absorption
such as Na D.

qupt02dd.xy : Polarization data (dd=08, 09, 10)
They include lambda(A), q(%), u(%), P(%), theta(deg), Perr.
The data are binned to a constant photon noise of Perr = 0.05 %.
I ignore the spectropolarimetric data on Feb. 11 because they
had much lower S/N than those on other days.

quptmean.xy : Polarization data averaged over above three days.
In this period, no significant change was seen in polarization
properties as seen in the above plot. Data format is same as
above files. The data are binned to a constant photon noise
of Perr = 0.02 %.

I have not corrected for the heliocentric redshift in these data.

**************************************************
Perr must stand for photon noise error.
I assume no reddening correction either

NGC 628 = M74
heliocentric velocity
from lines in sn spectra  +631 km/s  iauc 7822 S. Smartt & P. Meikle
from Leda  in radio       +656 km/s
from Leda  in optical     +639 km/s
from Leda  mean           +656 km/s

Foreground extinction in
B from Leda/Schlegel   0.30
E(B-V)=.30/4           0.075
E(B-V)=.30/4.1         0.073  See Cardelli p. 249
Paolo E(B-V)           0.08


**********************************************

Polarization  2002 feb 9

lambda(A), q(%), u(%), P(%), theta(deg), Perr.

END:
  4751.5918 -0.453099996
  4832.20312 -0.702899992
  4901.56885 -0.645799994
  4963.69189 -0.480300009
  5019.4082 -0.565599978
  5075.06982 -0.521899998
  5123.52002 -0.502200007
  5165.33887 -0.653500021
  5206.93701 -0.688399971
  5248.50098 -0.552900016
  5290.18701 -0.592100024
  5324.85205 -0.671899974
  5352.66504 -0.560699999
  5380.45996 -0.666100025
  5408.20703 -0.447100013
  5436.00684 -0.492900014
  5463.76611 -0.786800027
  5491.56982 -0.810299993
  5519.3418 -0.559599996
  5547.1792 -0.741400003
  5574.95117 -0.553799987
  5609.55713 -0.578999996
  5651.27295 -0.745100021
  5693.13086 -0.63319999
  5734.9751 -0.630800009
  5776.65186 -0.671400011
  5818.3252 -0.580600023
  5859.96387 -0.469900012
  5901.67578 -0.570299983
  5943.26709 -0.528800011
  5985.05908 -0.480399996
  6026.61816 -0.618799984
  6068.47119 -0.666700006
  6110.20508 -0.601899981
  6151.7998 -0.632099986
  6193.72021 -0.552100003
  6235.43018 -0.54430002
  6277.06201 -0.730300009
  6311.78906 -0.698099971
  6339.5498 -0.519599974
  6367.30615 -0.56099999
  6395.08789 -0.477899998
  6422.90723 -0.556200027
  6450.69189 -0.678200006
  6478.521 -0.597100019
  6506.3042 -0.56129998
  6534.08203 -0.601599991
  6561.8999 -0.74059999
  6589.65381 -0.625100017
  6617.49707 -0.521099985
  6645.27295 -0.600499988
  6673.0708 -0.587599993
  6700.88086 -0.718999982
  6735.54102 -0.501299977
  6777.2041 -0.569400012
  6818.97412 -0.519599974
  6859.729 -0.507099986
  6902.80615 -0.524200022
  6944.18799 -0.453099996
  6985.75781 -0.458999991
  7027.47314 -0.400299996
  7069.13721 -0.492900014
  7110.94287 -0.343100011
  7152.45898 -0.539799988
  7194.32324 -0.594299972
  7235.74414 -0.567900002
  7284.3999 -0.577400029
  7339.69922 -0.542100012
  7401.30518 -0.801800013
  7477.70117 -1.21459997
  7569.29297 -0.911899984
  7686.62305 -0.424199998
  7764.87891 -0.432500005
  7826.92822 -0.416999996
  7882.43799 -0.207499996
  7937.99219 -0.218700007
  7993.56885 -0.172299996
  8055.7002 -0.159899995
  8125.48193 -0.57950002
  8195.33105 -0.399199992
  8265.44141 -0.548699975