# XMM-Newton Spectrum of the magnetar CXOU J171405.7-381031

## TL;DR

This study provides detailed X-ray spectral analysis of the magnetar CXOU J171405.7-381031 using XMM-Newton data, revealing its spectral parameters and comparing its properties with other magnetars, highlighting its relatively high temperature and stability over years.

## Contribution

First detailed spectral characterization of CXOU J171405.7-381031 after removing supernova remnant flux, with comparison to magnetar population highlighting its unique properties.

## Key findings

- Spectral parameters consistent with magnetar trends
- No significant flux or spectral variability over 9 years
- Higher temperature possibly due to young age

## Abstract

We observe the magnetar CXOU J171405.7-381031 with XMM-Newton and obtain the most reliable X-ray spectral parameters for this magnetar. After removing the flux from the surrounding supernova remnant CTB~37B, the radiation of CXOU J171405.7-381031 is best described by a two-component model, consisting of a blackbody and power law. We obtain a blackbody temperature of 0.58^{+0.03}_{-0.03} keV, photon index of 2.15^{+0.62}_{-0.68}, and unabsorbed 2-10 keV flux of 2.33^{+0.02}_{-0.02} x 10^{-12} erg cm^{-2} s^{-1}. These new parameters enable us to compare CXOU 171405.7-381031 with other magnetars, and it is found that the luminosity, temperature and the photon index of CXOU J171405.7-381031 are aligned with the known trend among the magnetar population with a slightly higher temperature, which could be caused by its young age. All the magnetars with a spin-down age of less than 1~kyr show time variation or bursts except for CXOU J171405.7-381031. We explore the time variability for ten observations in between 2006 and 2015, but there is no variation larger than \sim 10%.