The USNO-B1.0 Catalog
(Entry Format) (B1.0 at USNO)

WCSTools Catalogs
Authors: D. Monet, S. Levine, B. Canzian, H. Ables, A. Bird, C. Dahn, H. Guetter, H. Harris, A. Henden, S. Leggett, H. Levison, C. Luginbuhl, J. Martini, A. Monet, J. Munn, J. Pier, A. Rhodes, B. Riepe, S. Sell, R. Stone, F. Vrba, R. Walker, G. Westerhout, R. Brucato, N. Reid, W. Schoening, M. Hartley, M. Read, S. Tritton

Documented in this Astronomical Journal paper

USNO-B is an all-sky catalog that presents positions, proper motions, magnitudes in various optical passbands, and star/galaxy estimators for 1,042,618,261 objects derived from 3,643,201,733 separate observations. The data were obtained from scans of 7,435 Schmidt plates taken for the various sky surveys during the last 50 years. USNO-B1.0 is believed to provide all-sky coverage, completeness down to V = 21, 0.2 arcsecond astrometric accuracy at J2000, 0.3 magnitude photometric accuracy in up to five colors, and 85% accuracy for distinguishing stars from non-stellar objects.

Since the catalog's size is about 80 GBytes, you have to either copy it from someone who has a copy or send a disk to Flagstaff for it. The Point of Contact for USNO-B is Dr. David Monet at dgm@nofs.navy.mil.

It can be searched at Flagstaff at http://www.nofs.navy.mil/data/FchPix/.

Map of B1.0 catalog on entire sky

Software for searching the USNO-B1.0 has been added to WCSTools release 3.3.0.
scat (sub1) searches the catalog by sky location or number.
imcat (imub1) lists the objects in the region covered by a FITS or IRAF image with world coordinate system (WCS) information in its header.
imwcs (imwub1) fits a WCS to a FITS or IRAF image using the USNO-B1.0 as a reference.

[Distributed B1.0 Format] [B1.0 at USNO] [USNO-A2.0 Catalog]
WCSTools