|Title||Mrk 609 and Mrk 883: AGN without Broad-Line Regions?|
|Author||Dr Margaret Trippe|
|Description||In the past few years there have been interesting reports of ..naked. Seyfert 2s, objects with the narrow optical emission line spectra characteristic of Seyfert 2s but with the bright, essentially unabsorbed X-ray spectra typical of Seyfert 1s. These AGN apparently lack broad-line regions (BLRs), in contradiction of the unified model. To date, the only naked Seyfert 2s confirmed by simultaneous optical and X-ray data show evidence for low accretion rates. It is therefore important to determine if there are any examples of Seyferts with moderate-to-high luminosities that lack BLRs. We propose simultaneous XMM and optical observations of Mrk 883 and Mrk 609, two moderate-luminosity naked Seyfert 2 candidates, to unambiguously determine if these AGN truly lack BLRs.|
|Publication||No observations found associated with the current proposal|
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|Mission Description||The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2011-09-11T00:00:00Z, 065255, 17.56_20190403_1200. https://doi.org/10.5270/esa-gcnn5s9|