| Proposal ID | 030742 |
| Title | A simultaneous near-IR and X-ray Spectroscopy Study of Circinus X-1 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0307420401 |
| DOI | https://doi.org/10.5270/esa-b492t52 |
| Principal Investigator, PI | Dr W. Clarkson |
| Abstract | Circinus X-1 is a key object in accretion/outflow studies, as it shows repeatedtransitions from pure accretion to accretion/outflow during periastron passagein its eccentric 16.6-day orbit, a transition crucial to violent objects fromthe X-ray Binaries through to Active Galactic Nuclei and hypernova/gamma-rayburst systems. Variable X-ray P-Cygni profiles offer a key window into theaccretion state of the inner disk, however comparable time-resolved ground-basedstudy has never been undertaken. With a joint UT1/ISAAC - XMM/EPIC programme, wewill perform a simultaneous spectroscopic study of the inner accretion disk andIR-bright regions at the time of transition, thus identifying for the first timethe emission regions and directly constraining the physics of the state-change. |
| Publications |
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| Instrument | EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2006-03-07T00:06:56Z/2006-03-11T07:12:50Z |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2007-05-31T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "inner accretion disk", "periastron passage", "cygni profiles", "variable xray", "XMM", "xray binary", "ir bright region", "xray spectroscopy", "inner disk", "emission region", "isaac xmm", "repeated transitions", "active galactic nuclei", "EPIC", "violent objects", "epic programme", "pure accretion", "circinus x", "key object", "key window" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr W. Clarkson, 2007, 'A simultaneous near-IR and X-ray Spectroscopy Study of Circinus X-1', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-b492t52 |