|Title||A simultaneous near-IR and X-ray Spectroscopy Study of Circinus X-1|
|Author||Dr W. Clarkson|
|Description||Circinus X-1 is a key object in accretion-outflow studies, as it shows repeated transitions from pure accretion to accretion-outflow during periastron passage in its eccentric 16.6-day orbit, a transition crucial to violent objects from the X-ray Binaries through to Active Galactic Nuclei and hypernova-gamma-ray burst systems. Variable X-ray P-Cygni profiles offer a key window into the accretion state of the inner disk, however comparable time-resolved ground-based study has never been undertaken. With a joint UT1-ISAAC - XMM-EPIC programme, we will perform a simultaneous spectroscopic study of the inner accretion disk and IR-bright regions at the time of transition, thus identifying for the first time the emission regions and directly constraining the physics of the state-change.|
|Publication||No observations found associated with the current proposal|
|Instrument||EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2007-05-31T00:00:00Z, 030742, 17.56_20190403_1200. https://doi.org/10.5270/esa-b492t52|