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 mar 07

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

END:
  5081.23193 -0.341899991
  5341.64111 -0.443800002
  5485.604 -0.619599998
  5611.15479 -0.701600015
  5750.38184 -0.354200006
  5863.66309 -0.40110001
  5950.28418 -0.632600009
  6030.15576 -0.813899994
  6105.80078 -0.759299994
  6173.87305 -0.559599996
  6233.27979 -0.606000006
  6287.16797 -0.50029999
  6341.07617 -0.452499986
  6395.52881 -0.434700012
  6449.15283 -0.555599988
  6503.29297 -0.558000028
  6557.06689 -0.472000003
  6610.95703 -0.465200007
  6664.96582 -0.501600027
  6718.9751 -0.682900012
  6772.99805 -0.807099998
  6826.98486 -0.897899985
  6889.04004 -0.850700021
  6949.07617 -0.890999973
  7002.80518 -0.872500002
  7050.04492 -0.791599989
  7090.521 -0.694899976
  7130.99512 -0.629800022
  7170.97803 -0.842000008
  7212.52979 -0.802600026
  7252.65283 -0.766600013
  7292.88818 -0.670300007
  7333.35107 -0.898199975
  7373.66992 -0.818099976
  7413.93896 -0.678200006
  7460.79199 -0.879800022
  7521.021 -1.09140003
  7597.1792 -0.551699996
  7680.14404 -0.531099975
  7724.82617 -0.441799998
  7765.38623 -0.380400002
  7806.13379 -0.295599997
  7846.18408 -0.711199999
  7893.25098 -0.769500017
  7947.13721 -0.957300007
  8001.00879 -1.21949995
  8060.82617 -1.58299994
  8140.93799 -2.14369988
  8246.49023 -1.08659995
  8335.27441 -0.423999995
  8387.28125 -0.500899971
  8427.69727 -0.315400004
  8460.85254 -0.49059999
  8487.84961 -0.34889999
  8514.91895 -0.282499999
  8541.84277 -0.364600003
  8568.77441 -0.426899999
  8595.63867 -0.382400006
  8622.59863 -0.414700001
  8649.56836 -0.644400001
  8676.56543 -0.46540001
  8703.5459 -0.418799996
  8730.45508 -0.371600002
  8757.4209 -0.468499988
  8784.40723 -0.480599999
  8811.4541 -0.362599999
  8845.21973 -0.515799999
  8885.64258 -0.234300002
  8925.96387 -0.266200006
  8966.30469 -0.575900018
  9014.45215 -0.508099973