The Canada-France Redshift Survey. III. ``Single Emission-Line'' Objects, Analysis of Repeat Observations, and Spectroscopic Identifications in the 1415+52 and 2215+00 Fields
Abstract
This paper is one of a series describing the Canada-France Redshift Survey (CFRS). It is shown how the shape of the continuum around the emission line can be used to distinguish between [O II] λ3727 at z > 0.76 and Hα at low redshift in spectra for which only a single isolated emission line is visible. Based on this, [O II] λ3727 is most likely to be the emission line in most of the single emission-line galaxies in the CFRS. The statistics of the repeated observations are analyzed to derive an empirical calibration of the reliability of the spectroscopic identifications in the CFRS in order to determine how often additional observations could lead to the identification of an initially unidentified object and to provide an estimate of the internal velocity accuracy. Finally, the results of spectroscopic observations of 413 objects in the 1415+52 and 2215+00 CFRS survey fields are presented.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1995
- DOI:
- 10.1086/176557
- arXiv:
- arXiv:astro-ph/9507012
- Bibcode:
- 1995ApJ...455...75L
- Keywords:
-
- CATALOGS;
- GALAXIES: DISTANCES AND REDSHIFTS;
- LINE: IDENTIFICATION;
- Astrophysics
- E-Print:
- 14 uuencoded postscript pages with figures 1,2,3,4,9 and 10. Other (large) figures available from the authors. Large data table not yet released. Also available at http://www.dao.nrc.ca/DAO/SCIENCE/science.html and coming soon on a CFRS homepage. Accepted June 19, scheduled for Dec 10 issue of ApJ