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G.M. Williger (NASA/GSFC), L.E. Campusano (U. de Chile), R.G. Clowes (U. Central Lancashire, England)
The largest structure known at z>0.2 consists of a large
group of at least 15 quasars at 1.21 Using the CTIO-4m telescope, we have completed a
spectroscopic survey of MgII absorption systems, by
observing 23 quasars with z>1.2 distributed over a ~
2\circ area embedded in the quasar group toward ESO/SERC
field 927. Statistics for the redshift distribution of MgII
absorbers with rest equivalent width W0(\lambda 2796) \geq
0.3 Å\ established by Steidel & Sargent et al. (1992,
ApJS 80, 1 ) are used for comparison, and degree-wide
structures are searched and compared with similar surveys at
z>2 through CIV absorbers (Williger et al. 1996, ApJS 104,
145). Our current results are presented and discussed.
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