404 Not Found
301 Moved Permanently
I've pinged the site, and it's live, so the site's not down, but something has changed at the server source. It looks like they've moved their files around or something. You need find out if they have an updated url, or find a different repository.
Edit: sorry missed the fact that there are two repositories listed. The thousandparsec
site seems to be active, so make sure you have your apt sources set up correctly. But the caliu.info
site sends you to a parking domain page, so it looks like it's simply dead.