Details of the 26-year-old's contract, including its length, have not been released.
"Catania can confirm reaching an economic agreement for the next few seasons with the striker
The former Liverpool striker joined Panathinaikos in 2009 after previously being on loan at its arch-rival Olympiacos.
However, his career in
Catania is safely in mid-table heading into the final weeks of the Serie A season.