|Joint XMM-Newton, Chandra, and RXTE Observations of Dips in Cyg X-1
|Prof Joern Wilms
|At orbital phase zero (i.e., the O star secondary intervening our line of sight to the black hole primary), Cyg X-1 shows X-ray dips due to highly variable absorption in matter in the accretion stream. Studying the physics of these dips requires joint XMM-Chandra-HETGS-RXTE observations: XMM-Newton provides the crucially important spectral continuum through the broad Fe line region at CCD resolution and it achieves high signal-to-noise in the &amp;lt;2keV band, allowing the dipping events to be temporally resolved and spectrally modeled on short time scales. The simultaneous Chandra data provide high resolution spectroscopy of the dipping events (albeit at a lower time resolution compared to XMM-Newton), while RXTE provides the hard X-ray continuum out to &amp;gt;150keV.
|No observations found associated with the current proposal
|EPN, RGS1, RGS2
|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.
|Publisher And Registrant
|European Space Agency
|European Space Agency, 2009, 050088, 17.56_20190403_1200. https://doi.org/10.5270/esa-8xury3o