Probing the X-ray Soft Excess in the Narrow-Line Seyfert-1 (NLS1) Galaxy Tonantzintla S180

TL;DR

This study analyzes the X-ray soft excess in the NLS1 galaxy Tonantzintla S180 using multiple XMM-Newton observations, finding that black body models better fit the data than power law models, revealing details about the soft excess component.

Contribution

It demonstrates that two black body components effectively model the X-ray soft excess in Tonantzintla S180, challenging previous reliance on power law models.

Findings

Power law models poorly fit the spectra.

Two black body components successfully model the soft excess.

Consistent black body temperatures across observations.

Abstract

A detailed X-ray Soft Excess of the narrow-line Seyfert-1 galaxy Tonantzintla S180 (Ton s180) present. The study used four XMM-Newton observations for period from the year 2000 to the year 2016 taken from the XMM-Newton archive. Two different models were used to treat the X-ray Soft Excess for each data separately, the first model is power law component and the second one is two black body components. We found that, for all observations, the spectra fitted by using a power law component are poor and the output parameters much different from the previous studies, this model unsuccessfully reproduces the continuum shape of the spectrum, including the soft excess, of all observations (Nh = 3.62 +-1020 cm^{-2} and photon index for the hard and soft bands are 3.31 and 1.57). The study proved that it can rely upon the two black body components in treating X-ray Soft Excess of the narrow-line Seyfert-1 galaxy (Nh= 1.395 +- 10^20 cm^{-2} and The temperature of the two black-body components (KT) are 0.075 and 0.17 keV).