1. INAF, Osservatorio Astronomico di Palermo Palermo Italy
2. Dipartimento di Fisica e ChimicaUniversitá di Palermo Palermo Italy
3. High Energy Astrophysics DivisionHarvard‐Smithsonian Center for Astrophysics Cambridge Massachusetts
4. Departamento de Astrofísica y Ciencias de la AtmósferaUniversidad Complutense de Madrid Madrid Spain
5. Infrared Science Archive (IRSA), Infrared Processing and Analysis Center (IPAC)California Institute of Technology Pasadena California
6. Spitzer Science Center (SSC), Infrared Processing and Analysis Center (IPAC)California Institute of Technology Pasadena California