A dataset provided by the European Space Agency

Name 050075
Title X-ray Timing Observations of NGC 5408 X-1: Pinning Down the Mass


DOI https://doi.org/10.5270/esa-6x2rb1s
Author Dr Tod Strohmayer
Description We propose EPIC observations of the ultraluminous X-ray source (ULX) in NGC 5408. Our AO4 pointing has revealed a wealth of new timing properties in this object. We have found the first quasiperiodic oscillation (at 20 mHz) and power spectral break in this source. The power spectrum in the hard X-ray band shows a classic ..flat-topped. noise with a break in the power law very close to the 20 mHz QPO. These timing signatures allow the first estimates of the mass of the ULX based on comparisons with similar features observed in Galactic black hole systems accreting at high rates.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-01-13T17:42:44Z/2008-01-15T03:13:41Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations.
Since Earth's atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2009-02-07T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2009-02-07T00:00:00Z, 050075, 17.56_20190403_1200. https://doi.org/10.5270/esa-6x2rb1s