| Proposal ID | 067432 |
| Title | A further step in the understanfing of Radio-Loud Narrow-line Seyfert 1 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0674320301 |
| DOI | https://doi.org/10.5270/esa-obl0het |
| Principal Investigator, PI | Dr Luigi Pacciani |
| Abstract | 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 NLSy1sare characterized in X-ray to date, and it is not clear whether their X-rayspectra are dominated by the jet contribution or not. Here we propose to obtainthe quasi-simultaneous radio/optical/X-ray/gamma-ray spectrum of a sample of 4very RL (R$>$100) NLSy1s for a total observing time of 180 ksec. These sourceswere selected according their radio loudness and their radio spectral index.Recognizing our targets as blazar-like will support the hypothesis that theyrepresent a new class of blazars instead of the low-power tail of RL AGNs. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2011-08-08T00:55:11Z/2011-08-20T07:49:40Z |
| 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 | 2012-09-20T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "radio spectral index", "gamma ray", "rl nlsy1s", "x ray", "low power tail", "radio loudness", "xray spectra", "rl agns", "gamma ray spectrum" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Luigi Pacciani, 2012, 'A further step in the understanfing of Radio-Loud Narrow-line Seyfert 1', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-obl0het |