| Proposal ID | 004534 |
| Title | A search for cyclic activity in the nearby stars Alpha Cen and Procyon |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0045340101 |
| DOI | https://doi.org/10.5270/esa-12cvs16 |
| Principal Investigator, PI | Prof Jurgen Schmitt |
| Abstract | We propose to observe the nearby inactive stars Alpha Cen and Procyonregularly with XMM. Both sources are visible to XMM in 6 month intervals.Both stars are very close and hence the allow the detection of weak fluxeseven at higher energies. Specifically solar-like X-ray flux variationsin the 1 - 8 Angstrom band pass (as measured by GOES) will be detectablewith XMM EPIC. Also, for each observation a good XMM RGS spectrum will beobtained so that spectral changes over a time scale of years can bedetected and analysed. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2001-01-25T14:16:08Z/2004-07-29T05:59:20Z |
| 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 | 2005-08-28T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "cyclic activity", "EPIC", "specifically solar", "procyon regularly", "angstrom band pass", "xmm epic", "time scale", "XMM", "weak fluxes", "xray flux variations", "xmm rgs spectrum", "month intervals" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Prof Jurgen Schmitt, 2005, 'A search for cyclic activity in the nearby stars Alpha Cen and Procyon', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-12cvs16 |