A dataset provided by the European Space Agency

Proposal ID 020409
Title XMM-NEWTON OBSERVATION OF THE EXTREME NLS1 RX J0439-45
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0204090101

DOI https://doi.org/10.5270/esa-me4rsif
Principal Investigator, PI Prof KAREN LEIGHLY
Abstract 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.
Publications
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2006-02-22T00:00:00Z
Last Update 2025-08-04
Keywords "XMM", "empirical relationship", "XMM-Newton", "nls1 rx j0439", "xmm newton", "luminous xray", "xray spectral", "narrow line seyfert", "rx j0439", "xray properties", "variability properties", "HST"
Publisher And Registrant European Space Agency
Credit Guidelines 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