AstroSat view of the NLS1 galaxy Mrk 335

TL;DR

This study uses AstroSat to analyze the X-ray and UV emissions of the NLS1 galaxy Mrk 335 at two epochs, revealing a low flux state with a harder X-ray spectrum and variable UV flux, highlighting the dominance of distant reflection in the X-ray spectrum.

Contribution

First multi-wavelength monitoring of Mrk 335 with AstroSat capturing spectral states and variability over 18 days.

Findings

X-ray spectra were harder than usual during low flux state.

No variability in X-ray spectral shape or flux over 18 days.

UV flux showed variability between observations.

Abstract

We present the results from the multi-wavelength monitoring observations of the Narrow-Line Seyfert 1 galaxy Mrk 335 with AstroSat. We analysed both the X-ray (SXT & LAXPC) and UV (UVIT) data of the source at two epochs, separated by ~18 days. The source was in a low flux state during the observations, and the X-ray spectra were found to be harder than usual. The presence of soft X-ray excess was identified in the observations, and the broadband X-ray continuum was modelled with power-law and blackbody (modified by intrinsic absorption) and a distant neutral reflection component. We did not find any variability in the X-ray spectral shape or the flux over this period. However, the UV flux is found to be variable between the observations. The obtained results from the X-ray analysis point to a scenario where the primary emission is suppressed and the component due to distant reflection dominates the observed spectrum.