With 14 years, V723Cas is the oldest nova in the Galaxy. We search for reasonsfor the long life time of this nova compared to all other novae. With anuninterrupted 60-ks XMM observation, covering one orbit, we can: (1) constrainthe location of gas in the binary system using orbit phase-resolved EPIC spectra(2) study X-ray/UV variability, yielding the WD spin period, g modeoscillations, or evidence of renewed accretion disk activity (3) seecorrelations between X-ray and UV variability (4) investigate illuminationeffects of the companion with OM (5) determine from RGS whether the X-rayspectrum is a typical SSS spectrum, or whether it consists of overlappingemission lines. (6) search for emission lines yielding information on renewed accretion and cooling ejecta
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2010-08-26T18:07:43Z/2010-08-27T13:00:18Z
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.
European Space Agency, Dr Jan-Uwe Ness, 2011, 'A detailed X-ray study of the longest-lived nova in outburst comma V723 Cas', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-vxorzwm
