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High resolution Chandra X-ray imaging of the nucleus of M33

Abstract : We show with a short Chandra HRC-S exposure that the powerful X-ray source coincident with the nucleus of M33 is unresolved at the highest spatial resolution available to date (0"4). The source flux is variable, doubling during the 5 ks exposure. The combination of properties exhibited by M33 X-8 establishes the source as the nearest example of the ultra-luminous X-ray sources that have been uncovered in other nearby galaxies. On short timescales, we set limits of 9% r.m.s. variability for pulsations in the 0.01-1000 Hz range.
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Contributor : Dominique Girod <>
Submitted on : Monday, February 1, 2021 - 10:01:58 AM
Last modification on : Monday, February 1, 2021 - 10:02:55 AM

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G. Dubus, P. A. Charles, K. S. Long. High resolution Chandra X-ray imaging of the nucleus of M33. Astronomy and Astrophysics - A&A, EDP Sciences, 2004, 425, pp.95-98. ⟨10.1051/0004-6361:20041253⟩. ⟨in2p3-00086593⟩

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