http://arxiv.org/abs/1604.03320
We perform X-ray/UV spectral and X-ray variability study on the radio-loud Narrow Line Seyfert 1 (NLS1) galaxy RXJ1633.3+4719 using XMM-Newton and Suzaku observations performed in 2011 and 2012. The 0.3$-$10 keV spectra consist of an ultra-soft component below $0.5$ keV, described by an accretion disc blackbody ($kT_{in} = 39.6^{+11.2}_{-5.5}$ eV) and a power-law due to thermal Comptonization ($\Gamma=1.96^{+0.24}_{-0.31}$) of the disc emission. The disc temperature inferred from the soft excess is at least a factor of two lower than that found for the canonical soft excess emission from radio-quiet NLS1s. The UV spectrum is described by a power-law with photon index $3.05^{+0.56}_{-0.33}$. The observed UV emission is too strong to arise from the accretion disc or the host galaxy but can be attributed to a jet. The optical to X-ray spectral index of the source is consistent with radio-loud AGN. The X-ray emission from RXJ1633.3+4719 is variable with fractional variability amplitude $F_{var}$=13.5$\pm1.0\%$. In contrast to radio-quiet AGN, X-ray emission from the source becomes harder with increasing flux. The fractional RMS variability increases with energy and the RMS spectrum is well described by a constant disc component and a variable primary power-law continuum with the normalization and photon index anti-correlated. Such spectral variability cannot be caused by variations in the absorption and must be intrinsic to the hot corona. Our finding of possible evidence for emission from the inner accretion disc, jet and hot corona from RXJ1633.3+4719 in the optical to X-ray bands makes this AGN an ideal target to probe disc-jet connection in AGN.
L. Mallick, G. Dewangan, P. Gandhi, et. al.
Wed, 13 Apr 16
49/60
Comments: 12 pages, 11 figures, 3 tables, Submitted to MNRAS (minor revision)
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