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Flat spectrum radio quasars (FSRQs) are bright active galactic nucleisurrounded by gas clouds within a UV-visible intense radiation field that formthe so-called broad line region (BLR). These objects emit relativistic jetsfrom a region close to the central supermassive black hole and through the BLR.The Fermi-Large Area Telescope (Fermi-LAT) is sensitive to gamma-ray photonsfrom $\sim$30 MeV to more than 300 GeV. We have performed spectral analysis ofbright FSRQs in a 5.5 year (2008-2014) data sample collected by Fermi-LAT,using the new Pass 8 event selection and instrument response function. Also,our study of flaring episodes in a limited time range brings interestingresults while compared to the full 5.5 year data samples.

Spectral Studies of Flaring FSRQs at GeV Energies Using Pass 8 Fermi-LAT Data