Specview: a Java tool for spectral visualization and model fitting of multi-instrument data

Specview is a spectral visualization tool designed to provide easy simultaneous display and analysis of multiple 1-D spectrograms of the same astronomical source taken with different instruments. It is a standalone Java application that features, aside its main plotting capabilities, a spectral model fitting engine. This article describes its main features and some aspects of its internal design. The software can be downloaded from http://specview.stsci.edu.