Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26as..110..159b&link_type=abstract
Astronomy and Astrophysics Supplement, v.110, p.159
Astronomy and Astrophysics
Astrophysics
17
Galaxies: Redshifts, Surveys, Techniques: Radial Velocities
Scientific paper
In the goal to probe the distribution of galaxies at redshifts z=~0.1-0.5, we have started a deep redshift survey limited by R<=20.5. Using multiple object spectroscopy on the 2 largest telescopes at the European Southern Observatory, we have so far obtained 491 low-resolution spectra (~10-20A FWHM) of faint galaxies. Among the 386 spectra of galaxies with R<=20.5, redshifts have been measured for 320 objects (81%). The spectra of 105 objects fainter than our catalogue limit (with R>=20.5) were also taken simultaneously and at no additionnal cost in observing time, and we derived redshifts for 47 of them (43%). In this article we describe the different methods which we are using to reduce the spectroscopic data in a homogeneous way. Because of the low signal-to-noise ratio of the spectra, each step of the reduction must be optimized. Various tests are presented to evaluate the quality of the reduced data, and the linearity and zero-point of the redshift scale are checked. Using the already available data, we present preliminary diagrams of the redshift distribution and the fraction of objects with emission-lines.
Arnouts Stephane
Bellanger Christele
de Lapparent Valerie
Mathez Guy
Mazure Alain
No associations
LandOfFree
The ESO-Sculptor faint galaxy redshift survey: the spectroscopic sample. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The ESO-Sculptor faint galaxy redshift survey: the spectroscopic sample., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The ESO-Sculptor faint galaxy redshift survey: the spectroscopic sample. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1826722