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

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

2004-06-14

arxiv.org/abs/astro-ph/0406310v1

Astron.Astrophys. 425 (2004) 95-98

Astronomy and Astrophysics

Astrophysics

accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20041253

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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