The jetted NLS1 1H 0323+342: the Rosetta stone for accretion/ejection in AGN

TL;DR

This paper reanalyzes extensive X-ray observations of the gamma-ray narrow-line Seyfert 1 galaxy 1H 0323+342, exploring the interplay between its corona and jet to understand accretion and ejection processes in AGN.

Contribution

It provides a comprehensive reanalysis of all available X-ray data for 1H 0323+342, offering new insights into its spectral variability and the corona-jet connection.

Findings

Spectral variability linked to corona-jet interaction

Presence of a hard tail in the X-ray spectrum

Consistent flux levels facilitating detailed analysis

Abstract

1H 0323+342 is the nearest gamma-ray narrow-line Seyfert 1 galaxy (z=0.063). Its X-ray spectrum (0.3-10 keV) is characterised by significant spectral variability observed by many authors, with a backbone with photon index ~2 occasionally superimposed by a hard tail. This spectral variability has been interpreted as the interplay between the X-ray corona and the relativistic jet. The X-ray fluxes in the 0.3-10 keV energy band are generally around ~10^-11 erg cm^-2 s^-1, making it easier to get sufficient statistics even with short exposures. Here I present a reanalysis of all the available X-ray observations with Swift (181 obs), XMM-Newton (7 obs), Chandra (1 obs), and Suzaku (2 obs) performed between 2006 and 2025. Possible interpretations are proposed and discussed.