  We present GOSSIP (Galaxy Observed-Simulated SED Interactive Program), a new
tool developed to perform SED fitting in a simple, user friendly and efficient
way. GOSSIP automatically builds-up the observed SED of an object (or a large
sample of objects) combining magnitudes in different bands and eventually a
spectrum; then it performs a chi-square minimization fitting procedure versus a
set of synthetic models. The fitting results are used to estimate a number of
physical parameters like the Star Formation History, absolute magnitudes,
stellar mass and their Probability Distribution Functions. User defined models
can be used, but GOSSIP is also able to load models produced by the most
commonly used synthesis population codes. GOSSIP can be used interactively with
other visualization tools using the PLASTIC protocol for communications.
Moreover, since it has been developed with large data sets applications in
mind, it will be extended to operate within the Virtual Observatory framework.
GOSSIP is distributed to the astronomical community from the PANDORA group web
site (http://cosmos.iasf-milano.inaf.it/pandora/gossip.html)
