Optical identification of the ASCA Lynx Deep Survey: An association of quasi-stellar objects 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

Research output: Contribution to journalReview article

5 Citations (Scopus)

Abstract

Results 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 Solid-State Imaging Spectrometer in a ∼20′ × 20′ field of view with fluxes larger than ∼4 × 10-14 ergs s -1 cm-2 in the band. Follow-up optical spectroscopic observations were made, and five out of six sources are identified with active galactic nuclei/quasi-stellar objects (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. We find 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.

Original languageEnglish
Pages (from-to)210-215
Number of pages6
JournalAstrophysical Journal
Volume598
Issue number1 I
DOIs
Publication statusPublished - 2003 Nov 20

Keywords

  • Galaxies: active
  • Galaxies: clusters: general
  • Quasars: general
  • Surveys
  • X-rays: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint Dive into the research topics of 'Optical identification of the ASCA Lynx Deep Survey: An association of quasi-stellar objects and a supercluster at z = 1.3?'. Together they form a unique fingerprint.

  • Cite this

    Ohta, K., Akiyama, M., Ueda, Y., Yamada, T., Nakanishi, K., Dalton, G. B., Ogasaka, Y., Kii, T., & Hayashida, K. (2003). Optical identification of the ASCA Lynx Deep Survey: An association of quasi-stellar objects and a supercluster at z = 1.3? Astrophysical Journal, 598(1 I), 210-215. https://doi.org/10.1086/378690