Lanning 386 and J1923 are new cataclysmic variables which do not fall into thenormal categories. Both systems show two distinct states, a low state similar toa dwarf nova, and a high state simlar to a SW Sextantis star,with strong He IIand the rarely seen C IV emission lines. Observations of J1923 lead us tobelieve that the accretion disk may be truncated before hitting the surface tothe white dwarf due to the presence of a strong magnetic field, similar to theintermediate polars. We propose observing both of these systems over severalepochs to determine whether the x-ray spectrum of these objects are hard orsoft, which will tell us whether these sytems are closer to SW Sextantis starsor intermediate polars while in the high state.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2015-04-12T10:49:53Z/2015-05-21T19:22:04Z
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, Mr Mark Kennedy, 2016, 'What Makes Them Tick: Understanding the behaviour of Lanning 386 and J1923', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-vy4c5d4
