Issue |
A&A
Volume 570, October 2014
|
|
---|---|---|
Article Number | L2 | |
Number of page(s) | 4 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361/201424788 | |
Published online | 14 October 2014 |
A ~100 mHz QPO in the X-ray emission from IGR J17361-4441
1
ISDC Data Centre for Astrophysics, Chemin d’Écogia 16, 1290
Versoix,
Switzerland
e-mail:
enrico.bozzo@unige.ch
2
Institut de Ciències de l’Espai (IEEC-CSIC),
Campus UAB, Fac. de Ciències, Torre C5, parell,
2a planta, 08193
Barcelona,
Spain
3
INAF, Osservatorio Astronomico di Brera,
via E. Bianchi 46, 23807
Merate ( LC), Italy
Received:
10
August
2014
Accepted:
23
September
2014
IGR J17361-4441 was discovered by INTEGRAL undergoing its first detectable X-ray outburst in 2011 and was initially classified as an accreting X-ray binary in the globular cluster NGC 6388. A reanalysis of the outburst data collected with INTEGRAL and Swift suggested that the enhanced X-ray emission from IGR J17361-4441 could have been caused by a rare tidal disruption event of a terrestrial-icy planet by a white dwarf. In this letter we report on the analysis of XMM-Newton data collected in 2011 during the outburst from IGR J17361-4441. Our analysis revealed the presence of a 100 mHz quasi-periodic oscillation in the X-ray emission from the source and confirmed the presence of a soft thermal component (kT~0.08 keV) in its spectrum. We discuss these findings in the context of the different possibilities proposed to explain the nature of IGR J17361-4441.
Key words: X-rays: individuals: IGR J17361-4441 / X-rays: binaries
© ESO, 2014
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