Speaker
Description
Gamma-ray emitting narrow-line Seyfert-1 (g-NLSy1) galaxies are jetted sources,
harbour a relative low-mass black hole (10$^6$ - 10$^8$ Solar masses) which accretes
close to the Eddington limit. g-NLSy1 galaxies show characteristics similar
to those of blazars, such as flux and spectral variability in the gamma-ray energy
band and radio properties which indicate the presence of a relativistic jet.
These characteristics make them an intriguing class of sources to be investigated
by the Cherenkov Telescope Array (CTA), the next-generation ground-based
gamma-ray observatory.
CTA will cover the 20 GeV - 300 TeV energy range, with an average differential
sensitivity a factor 5-20 better with respect to the current imaging atmospheric
Cherenkov telescope (IACT) arrays. For transients/flaring events (time-scales
of ~1 day or shorter) CTA will be about two orders of magnitude more sensitive with
respect to Fermi-LAT at the overlapping energy of 25 GeV, allowing an unprecedented
opportunity to investigate flaring g-NLSy1 galaxies.
We present preliminary results obtained by simulating a few g-NLSy1 galaxies
by means of the CTA public ctools software and the public instrument response files,
investigating their possible detection and spectral properties, taking into
account both the effect of the extra-galactic background light in the
propagation of gamma-rays and intrinsic absorption components.
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