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  0.530799985
  4832.20312  0.721599996
  4901.56885  0.722000003
  4963.69189  0.530200005
  5019.4082  0.626299977
  5075.06982  0.551699996
  5123.52002  0.502300024
  5165.33887  0.676699996
  5206.93701  0.729200006
  5248.50098  0.617299974
  5290.18701  0.654500008
  5324.85205  0.707099974
  5352.66504  0.622399986
  5380.45996  0.75819999
  5408.20703  0.606599987
  5436.00684  0.608200014
  5463.76611  0.841300011
  5491.56982  0.904100001
  5519.3418  0.664499998
  5547.1792  0.798399985
  5574.95117  0.697099984
  5609.55713  0.639699996
  5651.27295  0.846599996
  5693.13086  0.781000018
  5734.9751  0.793299973
  5776.65186  0.873700023
  5818.3252  0.762000024
  5859.96387  0.702000022
  5901.67578  0.691999972
  5943.26709  0.698499978
  5985.05908  0.590399981
  6026.61816  0.791199982
  6068.47119  0.773699999
  6110.20508  0.712499976
  6151.7998  0.749800026
  6193.72021  0.621999979
  6235.43018  0.663699985
  6277.06201  0.764699996
  6311.78906  0.763400018
  6339.5498  0.586600006
  6367.30615  0.614700019
  6395.08789  0.556599975
  6422.90723  0.592000008
  6450.69189  0.760299981
  6478.521  0.752499998
  6506.3042  0.671000004
  6534.08203  0.76789999
  6561.8999  0.809899986
  6589.65381  0.756099999
  6617.49707  0.666499972
  6645.27295  0.679099977
  6673.0708  0.662199974
  6700.88086  0.844500005
  6735.54102  0.644800007
  6777.2041  0.726599991
  6818.97412  0.803300023
  6859.729  0.78549999
  6902.80615  0.779999971
  6944.18799  0.68720001
  6985.75781  0.80309999
  7027.47314  0.704200029
  7069.13721  0.765200019
  7110.94287  0.774999976
  7152.45898  0.799099982
  7194.32324  0.926500022
  7235.74414  0.954599977
  7284.3999  0.967400014
  7339.69922  1.10230005
  7401.30518  1.13129997
  7477.70117  1.47570002
  7569.29297  1.10080004
  7686.62305  0.95630002
  7764.87891  0.711199999
  7826.92822  0.644200027
  7882.43799  0.4903
  7937.99219  0.457399994
  7993.56885  0.412900001
  8055.7002  0.328200012
  8125.48193  0.700800002
  8195.33105  0.592700005
  8265.44141  0.634599984