  In the multi-messenger era, facilities share their results with the
scientific community through networks such as the General Coordinates Network
to study transient phenomena (e.g., Gamma-ray bursts) and implement real-time
analysis pipelines to detect transient events, reacting to science alerts
received from other observatories. The fast analysis of transient events is
crucial for detecting counterparts of gravitational waves and neutrino
candidate events. In this context, collecting scientific results from different
high-energy satellites observing the same transient event represents a key step
in improving the statistical significance of the high-energy candidate events.
This project aims to develop a system and a web platform to share information
and scientific results of transient events between high-energy satellites with
INAF participation (AGILE, FERMI, INTEGRAL and SWIFT). The AFISS platform
implements the COMET VO- Event broker and provides a web portal where the users
visualize the list of transient events detected by multi-messenger facilities
and received through the GCN. The web portal could show, for each event, a
summary of the scientific results shared by the real-time analysis pipelines
and a list of time-correlated transient events. In addition, the platform is
ready to receive results from participating facilities on sub-threshold events
(STE) that cannot be shared with the community due to the low statistical
significance. If the platform finds a time correlation between two or more
STEs, it can promote them to science alerts. The web interface shows the list
of STEs with possible time correlation with other STEs or science alerts. The
platform notifies the users with an email when a new transient event is
received.
