The gravitationally lensed, luminous infrared galaxy IRAS F10214+4724 observed with XMM-Newton

TL;DR

This paper presents XMM-Newton X-ray observations of the gravitationally-lensed infrared galaxy IRAS F10214+4724 at z=2.3, detecting faint X-ray emission consistent with previous Chandra data, with no definitive evidence of excess high-energy emission.

Contribution

First XMM-Newton observation of IRAS F10214+4724 providing X-ray flux and spectral data consistent with prior Chandra measurements.

Findings

Detected faint X-ray emission at 4 sigma significance.

X-ray spectral slope consistent with Gamma~2.

No confirmed high-energy excess emission detected.

Abstract

We report on a short XMM-Newton observation of the gravitationally-lensed, luminous infrared galaxy IRAS F10214+4724 at z=2.3. A faint X-ray source is detected at 4 sigma. The observed 0.5-2 keV (1.7-6.6 keV in the rest-frame) flux is 1.3e-15 erg/s/cm2 and the spectral slope in the rest-frame 1-10 keV band is Gamma~2. These results agree with those obtained from the Chandra X-ray Observatory, given the large uncertainties in both measurements. While possible evidence for excess emission above 5 keV is seen, we suspect this excess might be either spurious or not related to the infrared galaxy.