Observations with ROSAT, ASCA, and Chandra have revealed the existence ofVela-like pulsar+wind-nebula X-ray emission from within the unusual radio nebulaDA 495. The evidence suggests that DA 495 is a rare example of an aging..plerionic. supernova remnant. Direct constraints on the system.s age have notbeen achievable---none of the past observations has been capable of detectingpulsations. Similarly, the energetics of the engine driving the X-ray and radionebulosities are poorly constrained. We propose a 50 ksec XMM observation of DA495 to search for pulsations and obtain high-quality spectra of both thepoint-like and diffuse emission components, to better understand this object andthe observationally unexplored aging process for plerionic SNRs.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2007-04-21T12:55:46Z/2007-04-22T02:38:40Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs 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 Earths 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.
European Space Agency, Dr Zaven Arzoumanian, 2008, 'The Power in the Ring: Timing and Spectroscopy of the Central Engine in DA 495', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-mvj8qp4
