Large groups in the Chile-UK quasar survey

Details Large groups in the Chile-UK quasar survey Large groups in the Chile-UK quasar survey

1997-10-24

arxiv.org/abs/astro-ph/9710281v1

Astronomy and Astrophysics

Astrophysics

2 pages including 2 figures, Latex, sprocl.sty and psfig.sty included. To appear in proceedings of the 12th Potsdam Cosmology

Scientific paper

The Chile-UK quasar survey, a new-generation 140 deg^2 UVX survey to B = 20, is now \sim 25 per cent complete. The catalogue currently contains 319 quasars and 93 emission line galaxies. Using the minimal-spanning tree method, we have independently confirmed the \sim 200 h^-1 Mpc group of quasars at z \simeq 1.3 discovered by Clowes & Campusano (1991). We have discovered a new \sim 150 h^-1 Mpc group of 13 quasars at median z \simeq 1.51. The null hypothesis of a uniform, random distribution is rejected at a level of significance of 0.003 for both groups.

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