Narrow-line Seyfert 1 galaxies, identified by common optical emission-lineproperties, show dispersion among both their UV emission-line properties andtheir X-ray spectral and variability properties. However, we have tentativelyidentified an empirical relationship between the UV and X-ray properties thatmay reflect the influence of a range of L/M among NLS1s. To test thisconjecture, we propose a 30ks XMM-Newton observation of RX J0439-45, a luminousX-ray extreme NLS1 that we will also observe using HST.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-01-30T12:51:16Z/2005-01-30T22:16:34Z
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, Prof KAREN LEIGHLY, 2006, 'XMM-NEWTON OBSERVATION OF THE EXTREME NLS1 RX J0439-45', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-me4rsif
