We provide WFPC2 near-UV (F300W) images of the Hubble Ultra-Deep Field (HUDF). 
However, these data are superseded by much deeper data obtained with WFC3 {F336W} during
the UVUDF HST Treasury program 12354 (Teplitz et al. 2013, AJ 146,159).  The UVUDF data
are also available from the archive.

The WFPC2 data were presented in Voyer et al. (2009, AJ, 138, 598), and are comprised
of 24 images (1200s each) for a total of 12 orbits.  The images were taken at 4 roll
angles to attain more uniform depth across the field of view.  

The science images are in counts/sec and the zeropoint is 20.77 (AB).  Thus, to convert
a total flux (ind counts/sec) to a magnitude, m_300w(AB) = 20.77-2.5*log(flux).

The error (in counts/sec) at each pixel is 1/sqrt(wgt) where wgt is the value of the
weight map at that pixel.  To get an error for the entire aperture, simply add the
individual pixel errors in quadrature.