  We present an extended ultraviolet-blue (850-4700 AA) library of theoretical
stellar spectral energy distributions (SEDs) computed at high resolution, R=
50,000. The UVBLUE grid, as we named the library, is based on LTE calculations
carried out with ATLAS9 and SYNTHE codes developed by R. L. Kurucz and consists
of nearly 1800 entries that cover a large volume of the parameter space. It
spans a range in effective temperature from 3000 to 50,000 K, the surface
gravity ranges from log g= 0.0 to 5.0 with a step of 0.5 dex, while seven
chemical compositions are considered: [Fe/H]= -2.0, -1.5, -1.0, -0.5, +0.0,
+0.3 and +0.5 dex. For its coverage across the H-R diagram, this library is the
most comprehensive one ever computed at high resolution in the short-wavelength
spectral range, and useful application can be foreseen both for the study of
single stars and in population synthesis models of galaxies and other stellar
systems.
