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Subsections

6 Results

6.1 Quality ratings for spectroscopic parameters


 

 
Table 4: Percentage distribution of quality ratings
Quality Rating Percentage of Sample Galaxies
           
  Standard galaxies Region 1 Region 2 Region 3 Coma galaxies
           
$Q_{\rm spec}$ = 1  72  24  62  63  43
$Q_{\rm spec}$ = 2  28  26  26  28  32
$Q_{\rm spec}$ = 3   0  46  10   9  25
$Q_{\rm spec}$ = 4   0   4   1   0   0



  \begin{figure}{
\par\psfig{file=fig9.ps,height=60mm} }
\par\end{figure} Figure 9: Histogram of the fractional errors in the values of $\sigma $determined from repeat observations

A quality rating was assigned to the results from each spectrum, on the basis of the cross-correlation results, and also after visual inspections of the spectra. Quality ratings were made as follows: Q = 1 for excellent spectra (S/N per $\mbox{\AA}
>$ 20; mean $S/N \sim$ 30); Q = 2 for good spectra (mean S/N $\sim$ 16); Q = 3 for acceptable spectra (mean S/N$\sim$ 11); and Q = 4 for poor spectra (S/N < 10; mean S/N $\sim$ 4). The mean Tonry & Davis r values for the four quality ratings are $\sim$ 23, $\sim$ 17, $\sim$ 13, and $\sim$ 7 for ratings of $Q_{\rm spec}$ = 1, 2, 3, and 4 respectively. The percentage distribution of the quality ratings is shown in Table 4. For the spectra in the three sample regions, 78% of the spectra are of quality 1 or 2.

The S/N required to obtain a good measurement of radial velocity is lower than the S/Nrequired to obtain a reliable velocity dispersion. For the galaxies with Q = 4 the signal was not strong enough to enable a reliable determination of the velocity dispersion. This was the case for galaxies of low surface brightness for which it was difficult to obtain spectra with a high enough S/N ratio. From these weak spectra, only redshifts were found, and these galaxies were not included in the sample used for distance determination. Below a certain limit, the values of velocity dispersion are less reliable. In the final sample we used only galaxies with high enough $\sigma $ values to be determined accurately. The lower limit on usable $\sigma $ values depends on the instrumental resolution. For the spectra taken at MDM, with a dispersion of $\sim 2.3 ~\mbox{\AA}$/pix and an instrumental resolution of $\sim 130$ km s-1, only velocity dispersions which are larger than 130 km s-1 can be measured reliably. For the spectra from the MMT, for which the dispersion was $\sim 0.80~ \mbox{\AA}$/pix and the instrumental resolution was $\sim
40$ km s-1, the limit is lower.


 

 
Table 5: Spectroscopic parameters for the sample galaxies
Galaxy Right Ascension Declination bJ d $v_{\rm hel}$ err$_{\rm v}$ $\sigma $ err$_\sigma$ $Q_{\rm spec}$
   
Region 1                  
87101144 16 01 52.14 -01 59 05.0 13.9 1.3 9259 26 305 4 1
65301306 15 16 17.18 -15 48 54.6 14.3 1.2 7296 17 270 16 1
65300653 15 24 14.86 -12 48 29.1 14.3 1.2 7351 15 232 21 1
72501710 15 17 51.60 -08 21 00.2 14.4 1.3 7573 22 149 18 3
79800188 15 47 10.58 -07 19 44.2 14.4 1.3 8032 28 208 3 1
65301588 15 12 23.45 -14 25 57.7 14.5 1.1 7419 18 286 5 3
65301596 15 12 14.43 -14 23 39.5 14.5 1.0 7475 18 168 9 1
87001759 15 36 17.64 -01 34 19.3 14.6 1.3 3439 4 154 3 1
65401564 15 41 57.11 -15 18 30.0 14.8 1.1 7320 19 209 15 1
72700354 16 07 48.41 -11 43 45.9 14.8 0.9 7964 17 109 25 3
79800136 15 48 02.65 -07 24 36.0 14.9 0.8 7742 10 231 13 3
87101109E 16 01 53.82 -01 36 41.8 - - 9069 21 313 1 2
65402690 15 34 32.77 -16 25 59.2 15.0 1.0 7196 18 291 19 1
CGCG2158 15 13 02.87 +02 25 56.5 15.0 0.6 1849 22 63 17 1
72601433 15 31 40.06 -08 44 21.2 15.0 0.8 7129 17 265 13 1
79701386 15 20 15.85 -07 09 10.5 15.1 1.2 11730 17 239 5 2
65402668 15 34 40.55 -16 25 36.1 15.1 0.7 6798 12 147 13 1
79702357 15 12 55.64 -05 35 58.1 15.1 1.2 11404 29 228 2 2
79801072 15 30 47.53 -04 55 45.2 15.1 0.7 8000 15 171 11 3
87000696 15 44 59.18 -01 23 30.8 15.1 0.7 8972 20 276 17 2
65401595 15 41 43.20 -15 15 44.8 15.1 0.8 7439 14 175 9 2
79700187 15 29 43.12 -06 35 46.2 15.2 0.9 11112 8 240 8 3
65403060 15 31 44.41 -16 27 53.1 15.2 1.1 7403 15 106 8 3
65300973 15 20 29.81 -15 49 34.3 15.3 0.8 7109 19 130 7 3
65501546 15 58 50.53 -15 22 19.0 15.3 0.9 7510 11 171 10 3
65402909 15 32 54.07 -16 37 02.4 15.3 0.9 6849 13 142 15 3
87002300 15 30 24.64 +00 36 31.6 15.3 0.8 10980 18 248 17 3
65401438 15 42 48.68 -16 52 32.8 15.4 0.8 11342 28 249 11 2
65300169 15 29 48.37 -17 26 03.3 15.4 0.7 7050 6 131 8 1
65401086 15 45 06.95 -13 14 13.8 15.4 0.9 11275 13 184 14 3
65402811 15 33 40.66 -16 06 32.6 15.5 0.6 7855 10 206 8 2
72600774 15 40 56.84 -08 59 11.0 15.5 0.6 17737 22 316 9 3
87002308 15 30 19.55 +00 38 12.6 15.6 0.7 11781 22 323 15 2
79901311 15 57 33.40 -06 46 40.9 15.6 0.7 9146 18 98 12 3
79800922 15 33 30.16 -05 11 58.9 15.6 0.6 7077 28 127 5 3
65301134 15 18 21.41 -13 31 45.3 15.6 0.6 7263 13 163 15 2
72502368 15 12 33.13 -12 13 26.2 15.7 0.7 7634 36 82 4 3
65502352 15 52 05.13 -17 10 43.8 15.7 0.9 16533 11 229 12 3
65402361 15 36 32.47 -16 32 16.3 15.7 0.6 10505 31 232 8 2
72502210 15 13 49.98 -08 49 51.2 15.7 0.7 5600 13 16 16 3
87001111 15 41 10.37 -01 35 46.1 15.8 0.6 16897 20 223 6 3
72600488 15 44 54.15 -11 43 03.4 15.8 0.7 24012 51 397 62 3
87100850 16 04 28.03 -01 41 33.1 15.9 0.7 10839 10 132 22 3
79702517 15 11 38.51 -04 14 50.8 15.9 0.8 10978 23 413 11 2
79800965 15 32 46.84 -03 19 02.3 15.9 0.5 18012 19 303 8 3
65502359 15 52 07.79 -15 13 22.9 15.9 0.6 17513 44 - - 4
87002295 15 30 27.12 +01 08 12.7 16.1 0.6 15068 30 - - 4
86902718 15 10 28.74 +02 12 43.1 16.1 0.5 11391 32 177 22 3
72801203 16 17 51.62 -10 20 59.9 14.6 1.1 8472 29 215 4 2
72801189 16 17 57.70 -09 46 17.2 14.9 0.9 8006 24 209 2 2



 
Table 5: continued
Galaxy Right Ascension Declination bJ d $v_{\rm hel}$ err$_{\rm v}$ $\sigma $ err$_\sigma$ $Q_{\rm spec}$
   
Region 2                  
NGC 7010 21 01 55.45 -12 32 17.1 14.3 1.9 8480 19 228 3 1
81405781 20 53 56.12 -04 01 20.4 14.7 1.1 6025 10 156 10 1
81303405 20 35 10.59 -06 16 00.6 15.1 1.0 3844 5 89 5 1
81502978 21 17 38.08 -05 05 20.4 15.1 0.9 9102 17 367 9 3
67200327 21 44 53.58 -13 24 53.2 15.1 0.8 5418 13 167 14 1
81303115 20 36 22.29 -05 08 59.3 15.2 1.2 3797 10 131 19 1
74402521 21 48 16.53 -09 30 02.4 15.2 0.9 5380 20 213 15 1
67003337 20 52 46.63 -13 39 34.8 15.3 0.9 24515 38 555 7 3
66901323 20 39 01.84 -14 01 30.9 15.4 0.8 8409 18 265 2 1
81603636 21 33 27.73 -03 33 44.1 15.4 0.8 8027 14 257 11 3
74402642 21 46 50.74 -10 05 44.3 15.5 1.1 23869 10 598 14 2
81405745 20 53 59.57 -03 32 27.4 15.5 0.6 5979 11 126 14 1
67001814 21 00 46.20 -15 10 30.3 15.5 1.1 8455 16 241 13 1
81503740 21 14 12.52 -04 42 24.4 15.6 0.8 13765 11 266 22 1
67003179 20 53 39.80 -14 35 43.1 15.6 0.8 8468 6 139 3 2
81601185 21 45 01.36 -06 35 43.1 15.6 0.9 6103 15 153 13 1
81602395 21 39 15.52 -06 56 13.7 15.6 0.8 6906 20 158 6 2
81404709 20 56 46.08 -04 38 08.9 15.7 0.8 4680 49 - - 4
67003696 20 50 48.81 -14 41 58.9 15.7 0.8 7580 11 178 6 1
81602330 21 39 29.90 -04 26 37.3 15.7 0.7 8225 25 114 8 1
67102806 21 27 46.38 -16 20 28.2 15.7 0.7 9353 7 215 4 1
74400983 21 41 10.20 -08 18 11.9 15.7 0.9 15305 22 351 4 1
81404583 20 57 05.76 -02 50 34.2 15.8 0.8 17209 34 510 16 2
74401483 21 35 55.30 -08 07 58.1 15.8 0.9 15751 7 348 3 2
67201749 21 37 30.96 -14 27 30.1 15.8 0.6 18358 25 514 13 1
67202822 21 38 18.48 -16 55 16.6 15.8 0.7 15509 29 469 13 1
67103161 21 20 15.95 -16 11 58.7 15.8 0.7 13294 19 231 4 1
67202363 21 47 30.24 -17 24 35.4 15.8 0.6 10185 10 174 14 1
74300882 21 15 30.52 -07 32 02.2 15.8 0.7 8270 10 122 18 2
67001913 21 00 17.18 -16 59 57.9 15.9 0.6 8716 17 246 1 2
81603664 21 33 17.98 -03 22 20.5 15.9 0.6 2873 4 104 3 1
81301006 20 46 07.02 -07 10 50.8 15.9 0.7 12441 17 162 15 1
67001942 21 00 05.85 -16 00 34.5 15.9 0.7 8501 27 341 7 1
81602522 21 38 30.84 -04 31 25.2 15.9 0.8 16219 11 268 14 1
81302133 20 40 42.55 -04 40 54.1 16.0 0.7 8611 19 140 13 3
74301907 21 19 33.98 -09 38 45.1 16.0 0.7 12340 14 297 11 1
74200901 21 05 07.05 -10 36 38.4 16.0 0.7 8780 19 213 5 1
74405800 21 34 26.16 -11 27 24.7 16.0 0.7 17794 21 266 11 1
81601843 21 41 57.89 -06 23 11.7 16.0 0.8 15768 31 249 1 3
81601806 21 42 05.59 -07 17 17.9 16.0 0.7 5998 9 121 15 2
67002128 20 59 13.51 -13 22 13.3 16.0 0.7 8492 17 197 9 2
81501871 21 22 42.66 -03 19 32.6 16.0 0.6 5640 20 77 15 2
81601380 21 44 05.41 -05 27 38.9 16.0 0.7 6584 15 92 11 1
74200951 21 04 47.84 -10 55 06.0 16.0 0.7 8269 10 141 12 2
81504194 21 12 07.77 -02 33 55.1 16.1 0.7 7957 7 111 3 2
67002172 20 58 59.41 -13 30 36.4 16.1 0.7 8822 19 254 7 1
81603573 21 33 47.15 -04 11 51.4 16.1 0.6 15726 30 195 2 2
81602191 21 40 10.46 -07 05 52.5 16.1 0.6 16043 33 321 1 2
74401426 21 36 27.77 -07 31 39.3 16.1 0.7 10425 21 49 24 2
81602252 21 39 51.84 -06 39 24.5 16.2 0.6 10348 30 134 6 2



 
Table 5: continued
Galaxy Right Ascension Declination bJ d $v_{\rm hel}$ err$_{\rm v}$ $\sigma $ err$_\sigma$ $Q_{\rm spec}$
   
81600601 21 47 54.17 -05 36 33.7 16.2 0.6 16715 17 325 19 2
67003806 20 50 17.86 -16 31 30.7 16.2 0.6 12891 21 330 5 1
81602134 21 40 27.29 -07 17 52.8 16.2 0.6 15015 31 251 2 2
74202489 20 55 31.78 -07 57 12.4 16.2 0.8 23717 30 349 6 3
67201815 21 36 19.16 -14 35 25.1 16.3 0.6 17930 23 446 16 2
67201810 21 36 28.63 -14 32 41.1 16.3 0.5 17972 16 286 2 2
81600354 21 49 07.77 -03 13 57.5 16.4 0.6 16461 17 228 13 1
74404851 21 45 19.53 -12 08 59.7 16.4 0.7 14761 22 175 7 1
81304119 20 31 56.30 -06 40 17.5 16.4 0.6 24394 37 360 11 1
67001459 21 02 45.64 -12 34 59.3 16.4 0.5 7940 16 128 10 1
67001377 21 03 14.05 -16 00 59.9 16.4 0.6 8511 19 134 8 1
67002239 20 58 37.77 -13 17 52.6 16.4 0.6 9258 12 167 49 1
74302893 21 21 43.60 -11 44 05.5 16.4 0.6 9011 20 133 12 1
81405246 20 55 21.94 -04 41 41.1 16.4 0.5 24804 50 452 18 1
74402668 21 46 34.70 -09 51 06.0 16.4 0.8 10281 37 315 11 1
74402837 21 44 20.85 -10 44 57.8 16.4 0.5 10820 14 193 8 1
81400846 21 08 17.34 -03 58 52.3 16.4 0.5 9427 5 317 9 1
74400638 21 44 34.04 -08 37 23.9 16.4 0.6 17950 22 259 17 1
67102743 21 28 57.59 -16 18 04.8 16.4 0.5 18655 17 320 15 1
67201875 21 34 48.75 -14 55 07.4 16.4 0.5 11424 17 297 34 1
81406413 20 52 10.94 -03 31 43.4 16.4 0.5 5823 17 51 15 1
66900782 20 44 16.43 -14 09 03.1 16.4 0.6 8742 4 110 9 1
67100128 21 29 20.05 -13 59 28.8 16.4 0.6 17408 13 322 17 1
88920974 21 53 26.20 -01 45 11.9 - 1.0 8045 17 323 14 1
88520340 20 44 50.30 +00 06 58.1 - 2.0 3804 16 172 15 1
88720594 21 11 23.79 +02 21 24.1 - 1.9 14544 37 154 10 3
88520337 20 44 36.89 +00 10 41.1 - 0.7 3865 7 41 31 3
Region 3                  
68100721 00 41 02.46 -08 27 37.1 14.4 1.2 5960 20 142 14 1
60800316 00 28 18.95 -12 59 46.4 15.0 0.9 6137 21 73 24 1
68101448 00 32 08.14 -11 02 30.3 15.0 0.8 6210 18 154 13 1
68001213 00 15 02.00 -09 49 15.6 15.1 1.0 6718 23 169 7 1
68101358 00 33 27.93 -10 23 49.2 15.1 0.8 5982 14 195 12 1
68101582 00 30 00.82 -12 20 25.9 15.1 1.1 16971 5 155 5 2
61100299 01 25 02.07 -13 59 59.2 15.2 1.0 9894 18 212 11 1
68100166 00 48 45.71 -08 52 07.3 15.2 0.8 4282 15 168 11 1
68301163 01 13 59.64 -08 14 26.4 15.2 0.7 5552 16 165 12 1
61001080 01 06 22.24 -15 40 21.3 15.3 1.0 15911 15 263 21 1
68001229 00 14 54.03 -09 48 27.0 15.3 1.1 6823 9 118 14 1
68100890 00 39 18.72 -09 34 38.6 15.4 0.8 16690 24 354 10 2
68101426 00 32 25.81 -09 37 03.4 15.4 0.7 6969 11 148 11 1
68300617 01 22 47.56 -12 10 25.5 15.4 0.8 15021 28 257 15 1
61001389 00 57 46.77 -15 34 06.1 15.4 0.9 16567 26 341 6 2
68100622 00 42 27.48 -09 09 47.5 15.4 0.7 5804 3 203 21 3
68101215 00 35 26.55 -08 20 55.3 15.5 0.9 11214 34 204 9 2
60800542 00 26 07.72 -13 17 11.2 15.6 0.7 7778 12 223 12 1
61002238 00 56 22.55 -16 44 20.3 15.6 0.8 16284 28 339 13 3
68300547 01 23 55.82 -08 49 25.6 15.6 0.7 5253 13 87 11 2
68201452 00 55 39.28 -08 29 15.7 15.6 1.1 4602 8 178 26 1
61001909 01 06 21.72 -16 12 47.6 15.7 0.9 12597 21 345 8 2
68101346 00 33 36.91 -07 58 26.3 15.7 0.6 11191 13 245 15 2



 
Table 5: continued
Galaxy Right Ascension Declination bJ d $v_{\rm hel}$ err$_{\rm v}$ $\sigma $ err$_\sigma$ $Q_{\rm spec}$
   
60901605 00 31 47.85 -12 55 55.0 15.8 0.7 8030 16 265 13 1
61002004 01 03 47.71 -16 48 34.6 15.8 0.8 11242 29 276 18 1
61100351 01 23 38.67 -13 40 53.1 15.8 0.9 14201 26 326 3 2
68201703 00 53 20.82 -10 15 22.6 15.8 0.8 16356 9 209 12 2
60800452 00 27 00.10 -14 16 10.3 15.9 0.7 16200 14 203 14 2
68201935 00 51 05.05 -08 31 35.7 15.9 0.8 13297 28 275 4 1
68101515 00 31 01.35 -09 28 13.5 15.9 0.6 5543 17 31 23 2
68100388 00 45 20.77 -12 03 50.9 15.9 0.5 5886 14 87 6 1
68101166 00 36 02.25 -09 23 15.9 16.0 0.5 6094 20 44 21 1
68201775 00 52 43.24 -11 31 48.3 16.0 0.7 16375 20 273 13 1
68101270 00 34 38.49 -09 43 55.1 16.0 0.6 15877 18 141 18 3
68100879 00 39 21.80 -11 06 24.8 16.0 0.6 15860 19 199 3 1
61102514 01 16 52.44 -16 54 12.4 16.1 0.6 6061 8 110 13 2
68201336 00 57 07.98 -09 09 03.2 16.1 0.7 16614 23 213 15 1
61000670 00 53 34.10 -13 37 41.5 16.1 0.6 16804 26 408 6 1
61100750 01 14 38.10 -14 15 39.3 16.1 0.6 15411 29 304 13 1
68201473 00 55 25.46 -09 47 42.8 16.1 0.6 15060 23 210 17 1
68101018 00 37 47.50 -07 43 43.7 16.1 0.6 3692 5 6 6 1
61100580 01 18 30.28 -14 06 42.2 16.2 0.6 15384 7 349 18 1
68201394 00 56 21.84 -09 02 42.6 16.3 0.5 8055 7 133 13 1
68100760 00 40 38.46 -10 08 07.2 16.3 0.5 15142 7 220 5 3
68300512 01 24 25.53 -07 37 57.6 16.3 0.5 10191 32 344 3 1
61100364 01 23 19.43 -12 46 09.6 16.4 0.5 10262 24 218 3 1
61101581 01 18 08.13 -14 07 33.0 - - 14708 3 246 12 1
61101582 01 18 06.14 -14 07 33.6 - - 16458 10 236 18 1
61101583 01 17 52.50 -14 09 06.4 - - 15292 19 224 8 1
61101584 01 17 52.46 -14 14 09.7 - - 20954 5 326 11 1
61001081 01 06 29.38 -15 41 12.2 - - 17451 28 454 10 2
61001082 01 06 21.22 -15 41 17.3 - - 16530 29 170 13 2
61001084 01 06 25.64 -15 42 15.1 - - 16913 12 228 8 2
61001085 01 06 33.34 -15 46 50.8 - - 16300 10 158 17 3



 
Table 6: Spectroscopic parameters for the standard galaxies
Galaxy Right Ascension Declination $v_{\rm hel}$ err$_{\rm v}$ $\sigma $ err$_\sigma$ $Q_{\rm spec}$
   
NGC 5831 15 01 34 +01 24 54 1648 19 139 3 1
NGC 5845 15 03 28 +01 49 36 1383 15 196 2 1
NGC 5846A 15 03 56 +01 47 12 1688 18 232 3 1
NGC 6020 15 55 00 +22 33 00 4307 16 173 15 1
NGC 6051 16 02 48 +24 03 54 9578 17 347 13 2
NGC 6086 16 10 36 +29 36 54 9549 25 313 15 1
NGC 7619 23 17 43 +07 56 00 3753 14 269 14 1
NGC 7626 23 18 10 +07 56 36 3431 15 313 8 1
NGC 227 00 43 03 -01 48 18 5434 16 243 15 1
IC 1696 01 22 19 -01 52 42 5860 11 166 8 2
NGC 533 01 22 57 +01 30 00 5521 13 224 20 1
NGC 636 01 36 36 -07 45 54 1861 19 155 3 1
NGC 7468 23 00 30 +16 20 00 2094 22 137 40 2
NGC 7751 23 44 24 +06 35 00 3247 10 123 3 2
NGC 541 01 23 12 -01 38 00 5401 20 186 14 1
NGC 545 01 23 24 -01 36 00 5296 18 203 14 2
NGC 1550 04 17 00 +02 18 00 3714 23 327 15 1
NGC 1587 04 28 06 +00 33 00 3597 22 239 16 1



 
Table 7: Spectroscopic parameters for the Coma galaxies
Galaxy Right Ascension Declination $v_{\rm hel}$ err$_{\rm v}$ $\sigma $ err$_\sigma$ $Q_{\rm spec}$
   
Coma  31 12 54 59.0 +27 46 00 7369 15 256 14 1
Coma  46 12 55 07.5 +27 52 55 6074 12 210 13 1
Coma  49 12 59 29.9 +27 53 36 7893 15 267 11 1
Coma  69 12 56 43.5 +28 03 16 7072 29 265 39 3
Coma  70 12 56 42.8 +28 02 21 6336 7 187 27 2
Coma  72 12 56 27.2 +28 03 33 5656 14 199 4 2
Coma  87 12 57 05.9 +28 03 45 7825 6 66 37 3
Coma  88 12 57 04.5 +28 07 09 6790 19 236 16 3
Coma 103 12 57 06.0 +28 09 13 4744 8 205 4 1
Coma 105 12 56 58.7 +28 10 59 5104 25 170 10 2
Coma 106 12 56 58.1 +28 10 05 5087 8 199 11 2
Coma 107 12 56 55.6 +28 09 25 6452 9 138 1 3
Coma 118 12 58 15.2 +28 11 42 7552 28 141 8 1
Coma 124 12 57 19.8 +28 11 02 6678 4 236 6 1
Coma 125 12 57 17.9 +28 11 47 6900 3 174 5 2
Coma 129 12 57 11.1 +28 13 53 7223 11 266 11 3
Coma 130 12 57 09.6 +28 13 09 7209 8 234 1 2
Coma 133 12 56 50.6 +28 14 33 4859 7 257 5 1
Coma 134 12 56 39.4 +28 13 51 6978 6 184 1 2
Coma 135 12 56 35.7 +28 14 23 8286 33 137 14 2
Coma 136 12 56 30.6 +28 14 12 5682 14 266 9 2
Coma 143 12 58 30.1 +28 16 42 4990 15 217 13 1
Coma 148 12 57 43.7 +28 14 54 6360 22 431 20 1
Coma 150 12 57 42.0 +28 16 33 7241 5 202 15 3
Coma 151 12 57 40.0 +28 15 32 6350 5 157 21 2
Coma 153 12 57 19.2 +28 15 57 6912 90 215 9 1
Coma 159 12 56 48.4 +28 14 54 6881 20 252 4 1
Coma 160 12 56 41.0 +28 15 58 7672 14 153 13 1
Coma 168 12 58 24.5 +28 21 40 7088 18 226 23 3
Coma 172 12 57 50.3 +28 18 45 5827 9 211 15 3
Coma 179 12 56 53.1 +28 21 13 4638 16 234 15 1
Coma 180 12 56 49.3 +28 20 53 7780 11 104 6 3
Coma 193 12 57 30.8 +28 24 00 7501 20 126 12 2
Coma 194 12 56 39.3 +28 23 47 7980 2 285 2 2
Coma 206 12 57 50.9 +28 28 17 8507 17 268 15 1
Coma 207 12 57 43.8 +28 26 31 6779 16 82 12 2
Coma 217 12 57 32.8 +28 31 08 6803 9 194 4 3
Coma 232 12 58 03.8 +28 36 55 6012 11 163 13 1
Coma 239 12 55 07.0 +28 44 28 6322 3 205 1 1
Coma 240 12 55 09.0 +28 45 06 6834 15 246 2 1



  \begin{figure}{
\psfig{file=fig10.ps,height=50mm} }
\end{figure} Figure 10: Comparison of results for heliocentric radial velocity with published data for 32 standard galaxies and 20 sample galaxies

6.2 Results for spectroscopic parameters

The results for the spectroscopic parameters are presented in Tables  5, 6, and 7. In cases where there were two or more spectra of the same galaxy available, the results with the smallest errors, from the spectrum with the highest S/N, were used. Histograms of the redshift distributions in the three sample regions are plotted in Fig. 5.

Spectroscopic results for the sample galaxies are given in Table 5. The columns in the table are as follows:
1. Galaxy number in the APM catalog (or the galaxy name from the NGC or CGCG catalog in a few cases); the first three digits of the APM galaxy number are the UK Schmidt plate number.
2 & 3. Right Ascension and Declination (epoch J1950.0) taken from the APM catalog.
4 & 5. Magnitude bJ (in mag) and major-axis diameter d (in arcmin) from the APM catalog (both values corrected for Galactic extinction). Preliminary values prior to final calibrations.
6. Heliocentric redshift $v_{\rm hel}$ (in km s-1).
7. Estimated internal error in $v_{\rm hel}$ (in km s-1).
8. Central velocity dispersion $\sigma $ (in km s-1).
9. Estimated internal error in $\sigma $ (in km s-1).
10. Quality rating $Q_{\rm spec}$ for the spectrum.

In Table 5, the galaxies are ordered by magnitude, with a few exceptions. The galaxies CGCG2158 (in Region 1) and NGC 7010 (in Region 2) were added for completeness. In Region 1, the galaxy denoted 87101109E is the elliptical galaxy close to 87101109, which was found to be a spiral. Also included are some galaxies from plates which are not in the final APM catalog: two galaxies from plate 728 in Region 1, and four galaxies (from plates 885, 887, and 889) in Region 2 (no magnitudes are given for these galaxies, since the magnitude zero-pointing and plate-matching calibration was not done for these plates). In Region 3, there are eight extra galaxies: a group near 61101581 and a group near 61101081, for which spectra had been obtained, and which were included in the sample.

The results for the spectroscopic parameters of the standard galaxies and Coma galaxies are presented in Tables 6 and 7 respectively. The columns are as in Table 5, except that magnitudes and major-axis diameters are not given. The names of the galaxies in Coma are taken from the Dressler numbers as catalogued by Dressler (1980).


  \begin{figure}{
\psfig{file=fig11.ps,height=80mm} }
\end{figure} Figure 11: Distribution of differences between measured redshifts and the redshifts given by NED (literature redshifts), for 52 standard galaxies and sample galaxies


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