| Name | 050154 |
| Title | Investigating the Hardest X-ray Narrow-Line Seyfert 1s |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0501540201 |
| DOI | https://doi.org/10.5270/esa-fr7irq9 |
| Author | European Space Agency |
| Description | Narrow-line Seyfert 1 galaxies (NLS1s) are an interesting subclass of type 1 AGN thought to have low black hole masses and high accretion rates. This has long been invoked to explain their unusual optical properties (narrow, strong Hbeta relative to OIII, strong FeII) as well as their typically bright, ultrasoft X-ray spectra. However, our recent Chandra study found that a few NLS1s actually have faint, hard X-ray spectra. We now propose to obtain deep EPIC spectra of the two hardest NLS1s in our Chandra sample, thereby determining whether this hardness is intrinsic to the AGN emission or instead due to absorption. The results of this study will not only affect the NLS1 paradigm, but also our understanding of formation and evolution of AGNs in general. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2008-01-06T20:11:33Z/2008-01-07T02:50:11Z |
| Version | 17.56_20190403_1200 |
| 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. |
| Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
| Date Published | 2009-02-05T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2009, Investigating The Hardest X-Ray Narrow-Line Seyfert 1S, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-fr7irq9 |