| Proposal ID | 011137 |
| Title | GT Observations of Active Cool Stars: AR Lac |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0111370101 |
| DOI | https://doi.org/10.5270/esa-pzhdmcf |
| Principal Investigator, PI | Dr Albert Brinkman |
| Abstract | GT-AR Lac is a fully eclipsing RS CVn binary system with extremely active coronae on both stars. Previous missions have found a prominent X-ray minimumaround the optical primary eclipse when the G star is occulted, and a shallowminimum around secondary eclipse. We propose here to study one ingress to or oneegress from the primary eclipse. We will use the EPIC cameras to obtain a lightcurve in unprecedented detail, the RGS combined with the EPICs to determinetime-dependent emission measure distributions and abundances, and the RGS tosearch for time/height-dependent densities. Simultaneous optical and radioobservations will be proposed. One EPIC MOS will be operated in TIMING/mediumfilter mode, while the pn will observe with the SML window and thick filter. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2001-12-05T18:36:04Z/2001-12-06T03:33:49Z |
| Version | 21.51_20241115_1113 |
| 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 | 2003-02-08T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "rgs combined", "time dependent emission", "medium filter mode", "secondary eclipse", "prominent xray minimum", "epic cameras", "sml window", "optical primary eclipse", "EPIC", "height dependent densities", "active coronae", "light curve", "ar lac", "thick filter", "epic mos", "active cool stars", "primary eclipse" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Albert Brinkman, 2003, 'GT Observations of Active Cool Stars: AR Lac', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-pzhdmcf |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |