News:
GAIA DR3 | 2024/02/25 10:59 |
Cartes du Ciel is free software released under the terms of the
GNU General Public License
News:
GAIA DR3 | 2024/02/25 10:59 |
Cartes du Ciel is free software released under the terms of the
GNU General Public License
This is an old revision of the document!
URAT is a follow-up project to the successful UCAC project using the same astrograph but with a much larger focal plane array.
Longer integration times and more sensitive, backside CCDs allowed for a substantial increase in limiting magnitude, resulting in about 4-fold increase in the average number of stars per square degree as compared to UCAC.
Additional observations with an objective grating largely extend the dynamic range to include observations of stars as bright as about 3rd magnitude. Multiple sky overlaps per year result in a significant improvement in positional precision as compared to UCAC.
Download the data, software and documentation from ftp://cdsarc.u-strasbg.fr/pub/cats/I/329/URAT1/
In the “access” directory compile the v1dump program: