3. Velocities and comparisons

In Table 1 we list positions, morphological types from Richter (1989) and heliocentric velocities for 12 individual galaxies in the cluster A1060, while in Table 2 we do that for 258 galaxies in 15 clusters in the direction of the Shapley supercluster. The columns give the following informations:

1. an identification number corresponding to the MEFOS arm used
2. right ascension (hour, min, sec)
3. declination (degree, minute, second)
4. estimated R magnitude, from the MAMA scans
5. morphological type, deduced from a visual inspection either of the MEFOS images, or from the POSS
6. heliocentric radial velocity
7. velocity errors
8. R value of the correlation, from Tonry & Davis (1979)
9. comments, including velocities from literature.

We emphasised the MAMA magnitudes have not been accurately calibrated, so these values are just a relative scale.

In order to test the external accuracy of our velocities, we compared our redshift measurements with data available in the literature. Furthermore, comparisons we made separately for the well-known A1060 galaxy cluster. We obtained respectively , the standard deviation in the difference being 42 (data from Richter 1989). All these results are consistent with the errors listed in Tables 1 and 2. The velocities in the present study agree with those previously published within the level.

For completeness purposes we list in Table 3 the velocities available in the literature for all galaxies in the diameter fields observed. These values are taken into account in the discussion below.

 

Cluster component BM D, R z comments

A3524 I 0, 5 14 0.0743 0.000103 1727 14 cD not observed

A3531 II 0, 5 5 0.0749 0.000220 525 40

A3542 a I 0, 4 10 0.0919 0.000153 1275 17 complex structure

b 7 0.1314 0.000150 2152 23

A3545 I-II 0, 6 5 0.0742 0.000137 1276 23

A3549 I-II 1, 5 8 0.0755 0.000170 715 24

A3554 I-II 1, 4 16 0.0486 0.000137 404 23 member of the SC

A3557 a I-II 0, 5 5 0.0476 0.000167 630 21 complex structure

b 8 0.0770 0.000167 213 10

A3566 II 2, 4 18 0.0516 0.000123 567 13 member of the SC

A3575 II 0, 4 12 0.0375 0.000130 572 12 foreground

A3577 II 2, 4 17 0.0496 0.000143 495 21 member of the SC

A3578 I-II 1, 3 14 0.0372 0.000123 410 15 foreground

A3581 I 0, 3 18 0.0226 0.000134 517 16 very foreground

AS718 I 0, 4 8 0.0478 0.000133 418 13

AS731 I-II 0, 4 7 0.0505 0.000233 657 26

AS733 II 0, 5 7 0.0694 0.000190 551 30 background