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29 March 2024
 
  » arxiv » astro-ph/0308066

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Optical Identification of the ASCA Lynx Deep Survey: An Association of QSOs and a Supercluster at z=1.3?
Kouji Ohta ; Masayuki Akiyama ; Yoshihiro Ueda ; Toru Yamada ; Kouichiro Nakanishi ; Gavin B. Dalton ; Yasushi Ogasaka ; Tsuneo Kii ; Kiyoshi Hayashida ;
Date 5 Aug 2003
Journal Astrophys.J. 598 (2003) 210-215
Subject astro-ph
AffiliationKyoto Univ.), Masayuki Akiyama (Subaru Telescope), Yoshihiro Ueda (ISAS), Toru Yamada (NAOJ), Kouichiro Nakanishi (NRO), Gavin B. Dalton (Univ. of Oxford, RAL), Yasushi Ogasaka (Nagoya Univ.), Tsuneo Kii (ISAS), Kiyoshi Hayashida (Osaka Univ.
AbstractResults of optical identification of the ASCA Lynx deep survey are presented. Six X-ray sources are detected in the 2-7 keV band using the SIS in a 20’x20’ field of view with fluxes larger than ~4x10^{-14} erg s-1 cm-2 in the band. Follow-up optical spectroscopic observations were made, and five out of six sources are identified with AGNs/QSOs at redshifts of 0.5-1.3. We also identify two more additional X-ray sources detected in a soft X-ray band with AGNs/QSOs. It is found that three QSOs identified are located at z~1.3. Two rich clusters and several groups of galaxies are also placed at the same redshift in the surveyed field, and projected separations between the QSOs and the clusters are 3-8 Mpc at the redshift.
Source arXiv, astro-ph/0308066
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