2 URAT1 ivo://irsa.ipac/USNO/Catalog/URAT1 NASA/IPAC Infrared Science Archive Zacharias et al. (2015) 2016-03-15 IRSA Support Team

irsasupport@ipac.caltech.edu URAT is a follow-up project to the successful UCAC project using the same astrograph but with a much larger focal plane array and a bandpass shifted further to the red. 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. https://irsa.ipac.caltech.edu/data/URAT1/urat1.html Catalog Research served-by IRSA TAP service 2 https://irsa.ipac.caltech.edu/SCS?table=urat1& 180 2147483647 false 281.22737 -24.6225386 0.01 2 To access this resource via TAP, issue ADQL queries on the table named urat1. https://irsa.ipac.caltech.edu/TAP 2 https://irsa.ipac.caltech.edu/cgi-bin/Gator/nph-dd?catalog=urat1 Optical usno USNO (United States Naval Observatory) Public Database urat1First USNO Robotic Astrometric Telescope Catalog