Folks, The 10 December 1998 issue of the ApJ contains an article by Brad Schaefer about SN1974G in NGC 4414 (1998 ApJ 509, 80). The paper is valuable for collecting in one place much unpublished or obscure data on the event, and for placing all the photometry on a consistent system. Included is BV photometry for comparison stars in the field used in previous publications and on the BAA and AAVSO charts of the galaxy. No chart or positions are provided, making the data difficult to use for other purposes without reference to earlier publications. I have made the IDs from those earlier papers using the USNO-A2.0 star catalogue. Positions, GSC names, Schaefer's photometry, and a few spectral types from the literature are shown in the table below, which is given in order of increasing magnitude. The columns BAA and AAVSO, taken from the Schaefer table, show chart magnitudes from those organizations. A second AAVSO "148" star is not identifiable via the Schaefer paper; its photometry is V = 14.87, B-V = 1.47 --- the reddest of the bunch. Remarks are given for three stars with asterisks (*). Name BAA AAVSO RA (2000) Dec GSC V B-V spec NGC 4414 1* 12 25 38.1 +31 16 43 2528-0325 10.05 0.68 dG5 NGC 4414 2* 12 27 14.1 +31 19 31 2528-0580 10.80 0.73 dG5 NGC 4414 3 12 26 41.1 +31 02 08 2528-0617 11.21 0.90 gK0 NGC 4414 B* 12 25 42.8 +31 07 10 2528-0178 11.48 1.11 dK7 NGC 4414 5 125 122 12 26 44.9 +31 19 05 2528-0367 12.34 0.98 dG8 NGC 4414 4 121 123 12 26 11.6 +31 08 19 2528-0220 12.44 0.68 dG5 NGC 4414 D 12 25 21.5 +31 14 59 2528-0094 12.65 1.00 NGC 4414 E 12 25 33.8 +31 05 12 2528-0557 12.98 0.72 NGC 4414 8 130 131 12 25 55.0 +31 12 38 2528-0241 13.30 0.83 NGC 4414 F 12 25 58.0 +31 01 19 2528-0349 13.59 0.76 NGC 4414 6 137 138 12 26 36.7 +31 22 04 2528-0574 13.93 0.57 NGC 4414 G 12 25 14.0 +31 09 22 2528-0450 13.99 0.62 NGC 4414 7 143 143 12 26 05.1 +31 21 51 2528-0253 14.40 0.51 NGC 4414 9 12 27 09.5 +31 07 50 14.56 0.79 NGC 4414 L 148 148 12 26 28.3 +31 15 23 2528-0663 14.89 1.01 NGC 4414 N --- 151 12 26 01.1 +31 14 33 15.11 0.74 NGC 4414 11 12 26 56.6 +31 01 20 2528-0589 15.17 0.68 NGC 4414 P 12 26 16.0 +31 10 10 2528-0280 15.40 1.12 Remarks NGC 4414 1 BD+32 2245. Tycho photometry: V = 9.97 +/- 0.03, B-V = 0.71 +/- 0.04. NGC 4414 2 slight motion; ACT position for epoch 2000.0. NGC 4414 B G 148-57, proper motion -0".34/+0".16 per year; GSC position given for epoch 1983.3. B-V color corresponds to somewhat earlier spectral type. It turns out several of the stars already have published UBV photometry. Comparisons for five stars are shown below. The "BPS" star is from the survey by Beers, Preston, and Shectman, and the photometry specifically from Doinidis et al. (1990 PASP 102, 1392 and 103, 973). The "AKS" stars are from Andruk et al. (1995 Astron. Nach. 316, 225). The agreement with Doinidis et al. is very good; the comparison with Andruk et al. confirms my earlier conclusion that their data are somewhat noisy but good enough for many purposes. Names V B-V BPS BS 16026-30 14.39 0.50 NGC 4414 7 14.40 0.51 [AKS95] 715 12.39 0.72 NGC 4414 4 12.44 0.68 [AKS95] 718 11.21 0.85 NGC 4414 3 11.21 0.90 [AKS95] 719 12.32 0.96 NGC 4414 5 12.34 0.98 [AKS95] 720 10.79 0.71 NGC 4414 2 10.80 0.73 Schaefer gives relationships to the standard systems for data from various sources concerning the lightcurve of the supernova. Those relevant to amateur observing are: mb = 0.84mb(Burkholder) + 2.60, and B = mb - 0.18(B-V) + 0.29 V = mv(BAA) + 0.15 V = mv(AAVSO) + 0.11 where the sources are Burkholder (1995 JAAVSO 23, 127), and the BAA and AAVSO charts. These three have rms scatter of +/- 0.07, 0.18, and 0.06 mag., respectively. Schaefer notes there is no significant color term in any of these older sequences. All the new sequence data (except for the large proper-motion star) have been added to my long list of photometric reference stars at: http://ftp.lowell.edu/pub/bas/starcats/loneos.stds All for now. \Brian