We present 547 optical redshifts obtained for galaxies in the region of the Horologium-Reticulum Supercluster ( HRS ) using the 6dF multi-fiber spectrograph on the UK Schmidt Telescope at the Anglo Australian Observatory .
The HRS covers an area of more than 12 \arcdeg \times 12 \arcdeg on the sky centered at approximately \alpha = 03 ^ { h } 19 ^ { m } , \delta = - 50°02′ .
Our 6dF observations concentrate upon the inter-cluster regions of the HRS , from which we describe four primary results .
First , the HRS spans at least the redshift range from 17,000 to 22,500 km s ^ { -1 } .
Second , the overdensity of galaxies in the inter-cluster regions of the HRS in this redshift range is estimated to be 2.4 , or \delta \rho / \bar { \rho } \sim 1.4 .
Third , we find a systematic trend of increasing redshift along a Southeast-Northwest ( SE - NW ) spatial axis in the HRS , in that the mean redshift of HRS members increases by more than 1500 km s ^ { -1 } from SE to NW over a 12° region .
Fourth , the HRS is bi-modal in redshift with a separation of \sim 2500 km s ^ { -1 } ( 35 Mpc ) between the higher and lower redshift peaks .
This fact is particularly evident if the above spatial-redshift trend is fitted and removed .
In short , the HRS appears to consist of two components in redshift space , each one exhibiting a similar systematic spatial-redshift trend along a SE - NW axis .
Lastly , we compare these results from the HRS with the Shapley supercluster and find similar properties and large-scale features .