Deep [ITAL]H[/ITAL]-Band Galaxy Counts and Half-Light Radii from [ITAL]Hubble Space Telescope[/ITAL]/NICMOS Parallel Observations

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Abstract
We present deep galaxy counts and half-light radii from F160W (λc=1.6 μm) images obtained with the Near-Infrared Camera and Multiobject Spectrograph on the Hubble Space Telescope. Nearly 9 arcmin2 have been imaged with camera 3, with 3 σ depths ranging from H=24.3 to 25.5 in a 06 diameter aperture. The slope of the counts fainter than H=20 is 0.31, and the integrated surface density to H≤24.75 is 4×105 galaxies deg-2. The half-light radii of the galaxies decline steeply with apparent magnitude. At H=24, we are limited by both the delivered FWHM and the detection threshold of the images.
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