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FLASH redshift survey - I. Observations and catalogue
The FLAIR Shapley-Hydra (FLASH) redshift survey catalogue consists of4613 galaxies brighter than bJ= 16.7 (corrected for Galacticextinction) over a 700-deg2 region of sky in the generaldirection of the Local Group motion. The survey region is a70°× 10° strip spanning the sky from the ShapleySupercluster to the Hydra cluster, and contains 3141 galaxies withmeasured redshifts. Designed to explore the effect of the galaxyconcentrations in this direction (in particular the Supergalactic planeand the Shapley Supercluster) upon the Local Group motion, the 68 percent completeness allows us to sample the large-scale structure betterthan similar sparsely-sampled surveys. The survey region does notoverlap with the areas covered by ongoing wide-angle (Sloan or 2dF)complete redshift surveys. In this paper, the first in a series, wedescribe the observation and data reduction procedures, the analysis forthe redshift errors and survey completeness, and present the surveydata.
| The Shapley Supercluster. I. Spectroscopic Observations in the Central Region
We present a new analysis of the kinematics of the Shapley superclusterbased on radial velocities for 1087 galaxies in the clusters A3558(Shapley 8), A3528 (Klemola 21), A3532 (Klemola 22), A3530, A3556 (SC1321-314), A3559 (CE 1327-292), A3560, A3562, SC 1329-314 and in theintercluster region of the core of the supercluster, of which 367 arenew measurements. We also present accurate positions from APM and MAMAscans of the ESO/SERC Southern Sky Survey photographic plates. We obtainnew velocity dispersions and estimate the masses of the member clusters,evaluating dynamical models of the supercluster. The supercluster isfound to be significantly flattened. We find that for {OMEGA}_0_ = 0.3,H_0_= 75 km s^-1^ Mpc^-1^, the gravitational pull of the superclustermay account for up to 25% of the peculiar velocity of the Local Grouprequired to explain the dipole anisotropy of the Cosmic MicrowaveBackground radiation, in which case the mass of the supercluster wouldbe dominated by intercluster dark matter. This fractional contributionwould be considerably higher for combinations of significantly lowervalues of {OMEGA}_0_ and higher values of H_0_.
| Redshifts in Klemola 27
Observational data for galaxies in the galaxy cluster Klemola 27gathered over the last few years are presented. These are mostly newredshifts and further, accurate coordinates and morphological types fora large number of 'prominent' galaxies in the ESO/SRC-Survey fields 444and 445. A few preliminary H I radial velocities are also reported. Thedata available for this cluster are briefly discussed.
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