Deep Hard X-ray Survey of the Large Magellanic Cloud

TL;DR

This deep INTEGRAL survey of the Large Magellanic Cloud identified 21 X-ray sources, including new discoveries and first-time detections of known objects in hard X-ray emission, enhancing understanding of the region's high-energy phenomena.

Contribution

The paper presents the first deep hard X-ray survey of the LMC, discovering four new sources and providing new insights into known high-energy objects in the region.

Findings

Detected 21 X-ray sources in the LMC region.

Discovered four new hard X-ray sources, two of which are extragalactic.

First detection of hard X-ray emission from PSR J0537-6910.

Abstract

Results of the deep survey of the Large Magellanic Cloud (LMC), performed with the INTEGRAL observatory, are presented. The long exposure (~7 Ms) allowed us to detect twenty one sources in this sky region: ten belonging to the LMC itself (7 HMXBs, 2 PSRs, 1 LMXB), six of extragalactic origin and three belonging to other galaxies from the Local Group - the Milky Way (2 sources) and Small Magellanic Cloud (1 source). Four new hard X-ray sources of these 21 ones were discovered during the survey in addition to IGR J05414-6858 reported earlier; two of them were identified with extragalactic objects. We report also for the first time the detection of a hard X-ray emission from the Crab-like pulsar PSR J0537-6910 and identification of the hard X-ray source IGR J05305-6559 with the high-mass X-ray binary EXO 053109-6609.