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- ID:
- ivo://ia2.inaf.it/tap/projects
- Title:
- INAF IA2 Project Resources TAP Service
- Short Name:
- ia2_projects_tap
- Date:
- 04 Feb 2021 00:01:05
- Publisher:
- IA2
- Description:
- INAF IA2 TAP service dedicated to projects and surveys that are not direct outcome of IA2 managed observatory/telescope archival efforts. Currently serving Exo Mer-Cat.
- ID:
- ivo://ia2.inaf.it/hosted/laurino2011/tap
- Title:
- Laurino et al 2011 Catalog of WGE photometric redshifts for SDSS candidate qsos and galaxies
- Short Name:
- wgesdsstap
- Date:
- 06 May 2024 08:19:45
- Publisher:
- IA2
- Description:
- The Sloan Digital Sky Survey (SDSS) has observed more than a quarter of the sky over eight years of operations, obtaining multicolor photometry and spectroscopy for ~ 1 million of galaxies. A catalog of photometric redshifts for ~ 2 millions quasars with magnitude r < 20.7 extracted from the SDSS DR7 dataset (D'Abrusco et al, 2009) is provided here. The photometric redshifts and the uncertainty of the estimates for each sources have been calculated using the Weak Gated Expert (WGE) method. The WGE (Laurino et al., submitted to MNRAS) is based on the exploitation of the spectroscopic redshifts for a subset of photometric sources and derives photometric redshifts through a combination of data mining techniques. This method can be applied to different classes of extragalactic sources and is scalable. A set of observational parameters used for the evaluation of photometric redshifts, the estimated photometric redshifts values and some of the most common observational parameters retrieved from the SDSS database have been included in the catalog for the sake of simplicity.
