IGR J22517+2218

Type	Redshift	Radio Counterpart			Infrared/Optical Counterpart
		R.A. (J2000)	Dec. (J2000)	References	R.A. (J2000)	Dec. (J2000)	References
Quasar Blazar	3.668
Published Papers		Bassani et al. 2007 ApJL, 669, L1 Gianni et al. 2011 MNRAS, 411, 2137 Lanzuisi et al. 2012, MNRAS, 421, 390

Miscellaneous :

Bassani et al. 2007:

Broad line emitting quasar, hosts narrow line absorption system
Source is a blazar
X-ray spectrum = hard power law with Γ~1.5
Curvature at soft X-ray => intrinsic absorption, or broken power law
Flux variability over a period of 6 days.
SED quite atypical: Synchrotron peak in the X/gamma-ray band, or the Compton peak in the MeV range.

Lanzuisi et al. 2012:

Analysis of archival (INTEGRAL, Swift) and new (Suzaku, Fermi) data
Source underwent a strong flare in 2005 (INTEGRAL, Swift data) and is in quiescence since then (Suzaku, Fermi)
SED built for two states, fitted and interpreted within leptonic one-zone synchrotron and inverse compton model
Both states => spectra dominated by the high energy hump peaking at ~1e20-1e22 Hz with a luminosity at least 2 order of magnitudes higher than the synchrotron peak (at ~1e11-1e14 Hz)
High energy hump is due to external inverse Compton while SSC component is negligible
Variability of the source explained as due to variations of the total number of emitting electrons

Last updated 13 Dec. 2011