|Title||A further step in the understanfing of Radio-Loud Narrow-line Seyfert 1|
|Author||Dr Luigi Pacciani|
|Description||The fraction of radio-loud (RL) objects in the narrow-line Seyfert 1s (NLSy1) population is very small. RL NLSy1 exhibit typical features of blazars in radio: the extreme cases have been recently detected in gamma-ray. Only few RL NLSy1s are characterized in X-ray to date, and it is not clear whether their X-ray spectra are dominated by the jet contribution or not. Here we propose to obtain the quasi-simultaneous radio-optical-X-ray-gamma-ray spectrum of a sample of 4 very RL (R > 100) NLSy1s for a total observing time of 180 ksec. These sources were selected according their radio loudness and their radio spectral index. Recognizing our targets as blazar-like will support the hypothesis that they represent a new class of blazars instead of the low-power tail of RL AGNs.|
|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, 2012-09-20T00:00:00Z, 067432, 17.56_20190403_1200. https://doi.org/10.5270/esa-obl0het|