Astronomy and Astrophysics – Astrophysics
Scientific paper
1995-07-04
Astronomy and Astrophysics
Astrophysics
7 uuencoded postscript pages with figures 1,2,3 and 6. Other (large) figures available from the authors. Large data table not
Scientific paper
10.1086/176558
Possible surface brightness selection effects in the redshift catalogs of the Canada-France Redshift Survey are investigated through comparisons of subsamples of the data. Our analyses demonstrate that the securing of redshifts is independent of possible biases arising from surface brightness effects and/or differing galaxy morphologies and orientations. The unusual geometry of the mask designs for our spectroscopic observations also do not produce any significant bias. There is however a bias at the highest and lowest redshifts, especially for absorption-line galaxies at z > 1 and z < 0.2, due to the adopted spectral range (4250A to 8500A). Apart from the latter, we conclude that our sample of identified galaxies is an unbiased subsample of the original photometric catalogue and is essentially limited by I-band flux density ($17.5 \leq I_{AB} \leq 22.5$). Finally, spectroscopic data for 273 objects in the 0300+00 CFRS field are presented.
Crampton David
Hammer Francçois
Le Fèvre Oliver
Lilly Simon J.
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