VizieR Online Data Catalog: Census of the Local Universe survey. I. CLU-Halpha (Cook+, 2019)
Abstract
The Census of the Local Universe (CLU) emission-line (Hα) galaxy survey (CLU-Ha) is a narrowband survey of the entire northern sky above a decl. of -20°, with the aim of constraining galaxy distances out to 200Mpc (z=0.047). We have imaged ~3πsr of the sky as part of the Intermediate Palomar Transient Factory (iPTF) with four contiguous narrowband filters with a combined wavelength range of 6525-6878Å. The first filter (Ha1) is centered near the z=0 Hα emission line (λ=6563Å), and the wavelength range of the last filter extends to the z=0.047 (i.e., ~200Mpc) Hα emission line.
Observations were taken on the Oschin 48 inch telescope at the Palomar Observatory with a 7.92deg2 mosaic imager. Data acquisition ended in 2017 March. See Section 2.2. Besides, we have obtained spectra for 334 candidates in the preliminary fields with no redshift information. The spectra were taken with the 200 inch Hale telescope atop Palomar Mountain on multiple nights over 2016 and 2017 using the Double-Beam Spectrograph instrument (DBSP) and on the 2.3 meter Wyoming Infra-red Observatory (WIRO) with the Longslit spectrograph. See Section 3.4. (2 data files).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- November 2020
- DOI:
- Bibcode:
- 2020yCat..18800007C
- Keywords:
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- Galaxy catalogs;
- Photometry: H-alpha;
- Photometry: ugriz;
- Photometry: ultraviolet;
- Spectra: optical;
- Redshifts;
- Surveys