In the past few years there have been interesting reports of ..naked. Seyfert2s, objects with the narrow optical emission line spectra characteristic ofSeyfert 2s but with the bright, essentially unabsorbed X-ray spectra typical ofSeyfert 1s. These AGN apparently lack broad-line regions (BLRs), incontradiction of the unified model. To date, the only naked Seyfert 2s confirmedby simultaneous optical and X-ray data show evidence for low accretion rates. Itis therefore important to determine if there are any examples of Seyferts withmoderate-to-high luminosities that lack BLRs. We propose simultaneous XMM andoptical observations of Mrk 883 and Mrk 609, two moderate-luminosity nakedSeyfert 2 candidates, to unambiguously determine if these AGN truly lack BLRs.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2010-08-20T09:14:14Z/2010-08-20T17:36:13Z
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 Margaret Trippe, 2011, 'Mrk 609 and Mrk 883: AGN without Broad-Line RegionsquestionMark', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-gcnn5s9
