High energy properties of PKS 1830-211

Abstract

We report on an analysis of X- and $\gamma$-ray observations of PKS 1830-211, based on the long-term campaigns carried out by \emph{INTEGRAL} and COMPTEL. The \emph{INTEGRAL} data currently available present a $33\sigma$ significance detection in the 20-100 keV band, while the COMPTEL 6-years data provide a $5.2\sigma$ significance detection in the 1-3 MeV energy band. At hard X-rays, \emph{INTEGRAL} and supplementary \emph{SWIFT} observations show flux variability on timescales of months. At $\gamma$-rays, the source shows persistent emission over years. The hard X-ray spectrum is well represented by a power-law model, with $\Gamma \sim 1.3$ in the 20-250 keV band. This photon index is well consistent with the previous report of $\Gamma \sim 1.3$ obtained at $E>3.5$ keV from the best fit of \emph{XMM-Newton} data with a broken power law model. The joint \emph{XMM-Newton}/\emph{INTEGRAL} spectrum presented here is then fit with a broken power-law model and the parameters are refined compared to the previous. The results show the photon index changes from $\sim 1.0$ to $\sim 1.3$ at a break energy $\sim 4$ keV. At MeV energies, the spectrum softens to $\Gamma \sim 2.2$. These results, together with the EGRET measurement at $E\ge 100$ MeV, constitute a broad-band spectrum containing the peak of the power output at MeV energies, similar to most high-luminosity $\gamma$-ray blazars. The measured spectral characterstics are then discussed in the framework of the gravitational lens effects.

accepted for ApJ

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Cited by in corpus (7)

• The INTEGRAL/IBIS AGN catalogue I: X-ray absorption properties versus optical classification
• Gamma-ray flaring activity from the gravitationally lensed blazar PKS 1830-211 observed by Fermi LAT
• Can the soft X-ray opacity towards high redshift sources probe the missing baryons?
• The remarkable gamma-ray activity in the gravitationally lensed blazar PKS 1830-211
• LS 5039 - the counterpart of the unidentified MeV source GRO J1823-12
• An X-ray view of the INTEGRAL/IBIS blazars
• Constraining $\gamma$-ray dissipation site in gravitationally lensed quasar -- PKS 1830$-$211