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C. Papovich (JHU), M. Dickinson, H. C. Ferguson, A. S. Fruchter, C. Hanley, R. A. Lucas, J. Mack, Piero Madau, M. Postman (STScI), A. Connolly, A. Szalay (JHU), M. A. Bershady, C. Conselice (U. Wisconsin), P. Eisenhardt (JPL), R. J. Elston (U. Florida), M. Giavalisco (OCIW), R. N. Hook (ST-ECF), S. A. Stanford (IGPP/LLNL), C. C. Steidel (Caltech)
We present multicolor, optical--infrared photometry from the Hubble Deep Field North (HDF-N), combining HST NICMOS and WFPC2 imaging data with ground--based K--band photometry from KPNO. New wide--field NICMOS maps of the HDF (Dickinson et al. 1999) provide deep, high resolution imaging and photometry at 1.1\mum and 1.6\mum which complement the four band (0.3--0.8\mum) optical data from WFPC2. We extend this to 2.2\mum using ground--based K--band imaging, using an optimized template fitting technique similar to that of Fernández--Soto et al.\ (1998). The resulting 7--band photometry greatly extends the wavelength baseline for studying faint HDF galaxies. We present color--magnitude and color--color diagrams for the whole HDF galaxy sample, along with spectral energy distributions for selected objects, and discuss the implications of these data for galaxy properties at high redshift.