| Name | 090337 |
| Title | XMM/HST monitoring of the ultra soft Narrow Line Seyfert 1 RX J1355.2+5612 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0903370201 |
| DOI | https://doi.org/10.57780/esa-xt4dut9 |
| Author | European Space Agency |
| Description | Ultra soft Narrow Line Seyfert 1 are characterized by a large spectral variability, a very steep X-ray primary continuum (> 2.5) and a strong soft excess. This remarkable spectral shape questions the origin of their broad-band UV-X-ray continuum compared to standard Seyfert galaxies. We propose to perform a monitoring composed of 5 x 26 ks XMM observations (total: 130 ks), spaced by 2-3 days and coordinated with HST, to probe the FUV, of RX J1355.2+5612. The proposed monitoring will allow us to 1) disentangle the different spectral components present from the UV/FUV to X-ray energy range and 2) investigate the nature of the soft X-ray excess and discriminate between the theoretical models that have been heavily discussed in the past decade |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2022-11-06T07:15:32Z/2022-11-18T19:56:49Z |
| Version | 20.09_20221024_1724 |
| 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 | 2023-12-16T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2023, Xmm/Hst Monitoring Of The Ultra Soft Narrow Line Seyfert 1 Rx J1355.2+5612, 20.09_20221024_1724, European Space Agency, https://doi.org/10.57780/esa-xt4dut9 |