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 -0.298700005
  5341.64111 -0.373299986
  5485.604 -0.106200002
  5611.15479 -0.310000002
  5750.38184 -0.305099994
  5863.66309 -0.414900005
  5950.28418 -0.2403
  6030.15576 -0.0772999972
  6105.80078 -0.0115
  6173.87305 -0.1752
  6233.27979 -0.337199986
  6287.16797 -0.212799996
  6341.07617 -0.221699998
  6395.52881 -0.228799999
  6449.15283 -0.258700013
  6503.29297 -0.199300006
  6557.06689 -0.134000003
  6610.95703 -0.105499998
  6664.96582 -0.0764999986
  6718.9751 -0.118299998
  6772.99805  0.0832000002
  6826.98486 -0.0709000006
  6889.04004  0.0571000017
  6949.07617  0.0206000004
  7002.80518 -0.1109
  7050.04492  0.0469000004
  7090.521 -0.140499994
  7130.99512  0.00960000046
  7170.97803  0.0137
  7212.52979 -0.221399993
  7252.65283 -0.0478999987
  7292.88818 -0.0544999987
  7333.35107 -0.127299994
  7373.66992 -0.114699997
  7413.93896 -0.064199999
  7460.79199 -0.0357000008
  7521.021 -0.0491000004
  7597.1792 -0.0650999993
  7680.14404 -0.373800009
  7724.82617 -0.318899989
  7765.38623 -0.359299988
  7806.13379 -0.294699997
  7846.18408 -0.146200001
  7893.25098 -0.379099995
  7947.13721 -0.224999994
  8001.00879 -0.0137999998
  8060.82617  0.327300012
  8140.93799  0.249400005
  8246.49023  0.0373000018
  8335.27441 -0.260800004
  8387.28125 -0.180899993
  8427.69727 -0.151800007
  8460.85254 -0.136999995
  8487.84961 -0.323700011
  8514.91895 -0.282400012
  8541.84277 -0.354099989
  8568.77441 -0.191300005
  8595.63867 -0.168200001
  8622.59863 -0.32069999
  8649.56836 -0.260399997
  8676.56543 -0.340700001
  8703.5459 -0.376700014
  8730.45508 -0.261099994
  8757.4209 -0.182600006
  8784.40723 -0.203099996
  8811.4541 -0.0691
  8845.21973 -0.184699997
  8885.64258 -0.344300002
  8925.96387 -0.4375
  8966.30469 -0.142700002
  9014.45215 -0.349999994