| Proposal ID | 040233 |
| Title | The big dipper to learn about accretion disks and their ionized atmosphere |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0402330301 |
| DOI | https://doi.org/10.5270/esa-s5akfje |
| Principal Investigator, PI | Dr Laurence Boirin |
| Abstract | With the discovery of FeXXV and FeXXVI absorption lines in the dipping systems(viewed close to the disk plane), XMM has revealed the existence of ahighly-ionized atmosphere above the accretion disk in low-mass X-ray binaries.We have further demonstrated that the spectral changes during dips, both in thelines and in the continuum could be explained by a decrease in the ionizationlevel of this plasma. We want to investigate the structure of the disk and ofits ionized atmosphere through time-resolved spectroscopy of the dips in X1624-490. Using the orbital ephemeris, we propose to trigger 4 observations,each one centered on one dip, for a total exposure of 104 ks. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2006-08-17T03:21:14Z/2007-02-15T10:04:25Z |
| 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 | 2008-11-24T00:00:00Z |
| Keywords | "total exposure", "XMM", "orbital ephemeris", "x 1624 490", "accretion dis", "disk plane", "accretion disk", "ionized atmosphere", "time resolved spectroscopy", "ionization level", "fexxvi absorption lines" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Laurence Boirin, 2008, 'The big dipper to learn about accretion disks and their ionized atmosphere', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-s5akfje |