Acknowledgements

I would like to thank Peter Bunclark for pointing out that this fainter grid would be useful. References =2.5em =1 CMC(1985-1995):Carlsberg Meridian Catalogue La Palma. Copenhagen University Observatory, Royal Greenwich Observatory and Real Instituto y Observatorio de la Armada, San Fernando. =2.5em =1 ESA:1997, `The Hipparcos and Tycho Catalogues', ESA, SP-1200. =2.5em =1 Mike Irwin, Steve Maddox, Richard McMahon, (1994), The APM Sky catalogues. Spectrum, Newletter of the Royal Observatories. =2.5em =1 R.A.Laing, J.E.Sinclair & R.Wood, ING Technical Note 85, Standard Star lists available at the ING. =2.5em =1 David Monet et al, A Catalog of Astrometric Standards. USNO.    http://cadcWWW.dao.nrc.ca/usno/