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  119.296997
  4832.20312  128.462997
  4901.56885  121.716003
  4963.69189  122.478996
  5019.4082  122.288002
  5075.06982  125.538002
  5123.52002  135.335999
  5165.33887  127.487
  5206.93701  125.373001
  5248.50098  121.806999
  5290.18701  122.390999
  5324.85205  125.911003
  5352.66504  122.130997
  5380.45996  120.726997
  5408.20703  113.737999
  5436.00684  117.073997
  5463.76611  124.638
  5491.56982  121.837997
  5519.3418  118.688004
  5547.1792  124.110001
  5574.95117  116.297997
  5609.55713  122.419998
  5651.27295  120.827003
  5693.13086  117.086998
  5734.9751  116.335999
  5776.65186  115.105003
  5818.3252  114.815002
  5859.96387  111.013
  5901.67578  117.75
  5943.26709  114.603996
  5985.05908  117.233002
  6026.61816  115.726997
  6068.47119  119.757004
  6110.20508  118.825996
  6151.7998  118.728996
  6193.72021  121.280998
  6235.43018  117.552002
  6277.06201  126.370003
  6311.78906  123.060997
  6339.5498  121.168999
  6367.30615  122.943001
  6395.08789  119.582001
  6422.90723  124.974998
  6450.69189  121.568001
  6478.521  116.259003
  6506.3042  118.386002
  6534.08203  115.789001
  6561.8999  123.061996
  6589.65381  117.884003
  6617.49707  115.710999
  6645.27295  121.074997
  6673.0708  121.271004
  6700.88086  119.178001
  6735.54102  115.512001
  6777.2041  115.801003
  6818.97412  110.151001
  6859.729  110.105003
  6902.80615  111.114998
  6944.18799  110.624001
  6985.75781  107.429001
  7027.47314  107.319
  7069.13721  110.050003
  7110.94287  103.137001
  7152.45898  111.248001
  7194.32324  109.950996
  7235.74414  108.253998
  7284.3999  108.321999
  7339.69922  104.726997
  7401.30518  112.568001
  7477.70117  117.695
  7569.29297  117.968002
  7686.62305  103.166
  7764.87891  108.725998
  7826.92822  110.167
  7882.43799  102.517998
  7937.99219  104.278999
  7993.56885  102.334999
  8055.7002  104.584999
  8125.48193  117.889999
  8195.33105  111.166
  8265.44141  119.917999