GAIA initial quasar catalogue - updates: morphology and variability
Abstract
The present version of the GAIA Initial QSO catalogue (GIQC III) contains 174,744 sources, divided in 3 categories: defining (full reliability, 123 880 sources), candidate (lacking full confir- mation of redshift or magnitude or pointlikeness, 24 229 sources), and other (pending confirmation of two or more characteristics, 26 235 sources). The GIQC III now includes morphological indexes, as derived from the study of the target's PSF from DSS R, B, and I plates, in comparison with at least 6 well imaged neighbor stars. A study was also made on the relationship between optical flux long term variability and the centroid's random walk. For that, classes of objects most prone to exhibit such relationship can be discussed.
- Publication:
-
Journées Systèmes de Référence Spatio-temporels 2010
- Pub Date:
- October 2011
- Bibcode:
- 2011jsrs.conf..125A