Diagnostics of nanoflare heating in active region core loops from chromospheric and transition region observations and modeling

Paola Testa1, Vanessa Polito1, Bart De Pontieu2, Fabio Reale3 and David Graham4, (1)Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States, (2)Lockheed Martin Solar and Astrophysics Laboratory, Palo Alto, CA, United States, (3)University of Palermo, Dipartimento di Fisica & Chimica, Palermo, Italy, (4)Bay Area Environmental Research Institute Moffett Field, Moffett Field, CA, United States