A dataset provided by the European Space Agency

Name 011139
Title GT Observations of Active Cool Stars: UX Ari
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0111390101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0111390201
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0111390301

DOI 10.5270/esa-2vfsbcv
Author Dr Albert Brinkman
Description GT-UX Ari is a very active RS CVn-type binary system that has produced some of the most energetic coronal flares seen on such stars. We propose to observe UX Ari for 40 ks to investigate the composition of its quiescent corona in detail, and, if a flare is seen, to follow the temperature, density, abundance, and plasma velocity histories during the evaporation and cooling processes in detail with the RGS and the EPICs. To avoid saturation, the pn and one MOS camera will be used in TIMING mode, both with the medium filter. The OM will observe with the UVW2 filter. Coordinated radio VLA and spatially resolved VLBA-VLBI as well as optical observations are planned to study the geometry and energy balance of UX Ari.s atmosphere.
Publication A study of coronal abundances in RS CVn binaries% . Audard, M., Gudel, M., et all. . A&A . 398-1137 . 2003 . 2003A&A...398.1137A ,
The XMM-Newton serendipitous survey. V. The Second XMM-Newton serendipitous source catalogue . Watson, M. G., Schroder, A. C., et all. . A&A . 493-339 . 2009 . 2009A&A...493..339W ,
Statistical evaluation of the flux cross-calibration of the XMM-Newton EPIC cameras . Mateos, S., Saxton, R. D., et all. . A&A . 496-879 . 2009 . 2009A&A...496..879M ,
The XMM Cluster Survey: optical analysis methodology and the first data release . Mehrtens, Nicola, Romer, A. Kathy, et all. . MNRAS . 423-1024 . 2012 . 2012MNRAS.423.1024M ,
Are stellar coronae optically thin in X-rays?. A systematic investigation of opacity effects . Ness, J.-U., Schmitt, J. H. M. M., et all. . A&A . 407-347 . 2003 . 2003A&A...407..347N ,
On the sizes of stellar X-ray coronae . Ness, J.-U., Gudel, M., et all. . A&A . 427-667 . 2004 . 2004A&A...427..667N ,
Coronal densities and temperatures for cool stars in different stages of activity . Ness, J.-U., Audard, M., et all. . AdSpR . 32-937 . 2003 . 2003AdSpR..32..937N ,
An All-Sky Atlas of Radio-X-ray Associations . Flesch, E., . PASA . 27-283 . 2010 . 2010PASA...27..283F ,
Mining for normal galaxies in the first XMM-Newton Serendipitous Source C...
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-02-15T11:00:44Z/2001-02-16T04:08:11Z
Version 17.56_20190403_1200
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2002-07-26T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2002-07-26T00:00:00Z, 011139, 17.56_20190403_1200. https://doi.org/10.5270/esa-2vfsbcv