A SURVEY OF GALAXY REDSHIFTS FROM LOW-RESOLUTION SLITLESS SPECTRA - SUGGESTION OF LARGE-SCALE STRUCTURES AT Z-APPROXIMATE-TO-0.1

We have conducted a galaxy survey based on low-resolution slitless spectra taken from the automated CFHT-Laval survey. We present redshift distributions for 522 galaxies distributed in four distinct regions of the sky. Redshifts are determined from the shifted positions of the 4000-Angstrom stellar break using an automated break-finding algorithm. The redshifts so obtained have a precision of < 3000 km s(-1), good enough to trace the large-scale distribution of galaxies. The most striking feature of the survey is an apparent excess of galaxies at z similar to 0.1 in eight of the 10 fields probed. Although the statistical significance of the peaks appears marginal(similar to 2.5 sigma per field), after taking into account the small-scale galaxy clustering, the peaks may nevertheless reveal the existence of large-scale structures at z similar to 0.1, indicating that the known large structures in the local Universe are not unusual.