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ASCA Observations of the Quasar Concentration 1338+27

  • T. Yamada (a1), Y. Ueda (a2), T. Takahashi (a2), T. Mihara (a3), N. Kawai (a3) and Y. Ishisaki (a4)...

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There are several regions where a group of quasars are significantly clustered in the physical space. In the “CFHT grens survey” conducted by Crampton et al. (Crampton et al. 1989 and references therein), the 23 quasars between z=1.036 and 1.185 were found to be clustered over ~ 2° × 2° in the region denoted as 1338+27 At the mean redshift z ave = 1.113, the angular extent 6000 arcsec (CHH89) of this cluster corresponds to 60 h −1Mpc(q 0 = 0.5) and the dispergion of the redshift λz = 0.044 to 45 h −1Mpc.

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