University of Hertfordshire

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From the same journal

By the same authors

An extragalactic spectroscopic survey of the SSA22 field

Research output: Contribution to journalArticlepeer-review


  • C. Saez
  • B. D. Lehmer
  • F. E. Bauer
  • D. Stern
  • A. Gonzales
  • I. Rreza
  • D. M. Alexander
  • Y. Matsuda
  • J. E. Geach
  • F. A. Harrison
  • T. Hayashino
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Original languageEnglish
Pages (from-to)2615-2630
Number of pages16
JournalMonthly Notices of the Royal Astronomical Society
Early online date7 May 2015
Publication statusPublished - 1 Jul 2015


We present Very Large Telescope VIMOS, Keck DEIMOS and Keck LRIS multi-object spectra of 367 sources in the field of the z ≈ 3.09 protocluster SSA22. Sources are spectroscopically classified via template matching, allowing new identifications for 206 extragalactic sources, including 36 z > 2 Lyman-break galaxies (LBGs) and Lyman α emitters (LAEs), eight protocluster members, and 94 X-ray sources from the ~400 ks Chandra deep survey of SSA22. Additionally, in the area covered by our study, we have increased by ≈4, 13, and 6 times the number of reliable redshifts of sources at 1.0 < z < 2.0, at z > 3.4, and with X-ray emission, respectively. We compare our results with past spectroscopic surveys of SSA22 to investigate the completeness of the LBGs and theX-ray properties of the newspectroscopically classified sources in the SSA22 field.


This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.

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