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ASCA Observations of the Quasar Concentration 1338+27

Published online by Cambridge University Press:  25 May 2016

T. Yamada ,
Y. Ueda ,
T. Takahashi ,
T. Mihara ,
N. Kawai  and
Y. Ishisaki
T. Yamada
Affiliation:
Astronomical Institute Tohoku University, Aoba-ku, Sendai 980-77, Japan
Y. Ueda
Affiliation:
Institute of Space and Astronautical Science, 3-1-1, Yoshinodani, Sagamihara, Kanagawa 229, Japan
T. Takahashi
Affiliation:
Institute of Space and Astronautical Science, 3-1-1, Yoshinodani, Sagamihara, Kanagawa 229, Japan
T. Mihara
Affiliation:
Institute of Physical and Chemical Research (RIKEN), Wako, Saitoma, 351-01, Japan
N. Kawai
Affiliation:
Institute of Physical and Chemical Research (RIKEN), Wako, Saitoma, 351-01, Japan
Y. Ishisaki
Affiliation:
Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-03, Japan

Extract

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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 zave = 1.113, the angular extent 6000 arcsec (CHH89) of this cluster corresponds to 60 h−1Mpc(q0 = 0.5) and the dispergion of the redshift λz = 0.044 to 45 h−1Mpc.

Type
Session 3: Diagnostics of High Gravity Objects with X- and Gamma Rays
Information
Symposium - International Astronomical Union , Volume 188: The Hot Universe , 1998 , pp. 438 - 439
Copyright
Copyright © Kluwer 1998