| Abstract : | Recent VHE detection of FSRQs at high redshift besides exposing the
universe is more transparent to VHE gamma rays than it was expected, it
has also questioned the plausible VHE emission mechanism. Particularly,
for FSRQs the gamma-ray emission is attributed to the external Comp-
ton process (EC). The widely studied external photon fields are IR dust
emission, broad line emission, and the emission from the accretion disk.
We perform a detailed spectral study of fermi-detected FSRQs using syn-
synchrotron, synchrotron self Compton (SSC), and EC emission mechanisms.
The simultaneous data is statistically fitted under
these emission mechanisms. The source VHE flux predicted by the best
fit model is accounted for extragalactic background light (EBL) induced
absorption. The observed VHE flux is then compared with the sensitivity
of the CTA. The results of the spectral fitting and its validation based on
future VHE detections will be discussed. |
