Relativistic observational period, is taken from ASI Science Data

Relativistic
jets powered in Active Galaxies are responsible for non-thermal emission, which
covers the whole electromagnetic spectrum. Furthermore, as explained in Chapter
1, the radiation in the high and low energy ranges are connected, being the result of
the same electron population radiation. Thus, to investigate radiation and
acceleration mechansims, we created multifrequency SED for all radiogalaxies
and Narrow-Line Seyfert 1 (NLSy1) galaxies detected in the first 4 years of Fermi-LAT
operation period.

The Fermi-LAT operates
since August 2008 gathering high energy data from both Galactic and
extragalactic objects and working with scanning mode. In the same time, since 2007, Swift also
study AGNs in optical/UV, X-ray and ?-ray bands, extending up to 150 keV. Initially,
this mission is dedicated
for studying Gamma-ray bursts (GRBs), but many non-GRB, including radiogalaxies,
has been detected. Combination these data with radio
archival data, we enable to study
radiogalaxies in wide energy range. What matters
is that, two humps in the
multifrequency SED of radiogalaxies are located in the same bands we observe.

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2.2. Data Acquisition

 

Based
on Fermi-LAT
publicy available data, we stydied all radiogalaxies and three variable NLSy1
galaxies, which are icluded in the FERMI-LAT 4-year Point Source Catalog (3FGL). The
observations for the most sources were performed only in ?-ray band,
accumulating data from the first 7 years of Fermi-LAT operation (from August 4,
2008 to August 4, 2015). Some variabile radiogalaxies (NGC 1275 and PKS0625-35)
and three NLSy1s were studied based on more than eight
years
collected
data. For these
sources, we performed also Optical/UV and soft X-ray monitoring using the data
obtained from Ultraviolet/Optical Telescope (UVOT) and X-ray Telescope (XRT)
instruments on the board of Neil Gehrels Swift Observatory. The archival radio data, with the same Fermi Lat observational
period,
is
taken from ASI
Science Data Center. These long period radio data don’t dramatically influence on our observations
within monthly periods, because the variability in this band is not noticable in
such short periods.