| Proposal ID | 074444 |
| Title | Understanding the X-ray Time delays in the simple spectrum NLS1: PG 1244+026 |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0744440101 |
| DOI | https://doi.org/10.5270/esa-rgl6z6k |
| Principal Investigator, PI | Mr William Alston |
| Abstract | PG 1244+026 is a simple Narrow Line Seyfert 1 galaxy, showing neither strongreflection features at iron, nor dramatic spectral-variability. Spectral-timinganalysis strongly supports the soft X-ray excess being an additional componentrather than ionised reflection. Yet the current data show lag-frequency andlag-energy spectra that are similar to those from sources apparently dominatedby ionised reflection. We propose a 600 ks observation (5 full orbits) of thissource to better constrain these higher order spectra, and interpret them inlight of the known spectral components. This will i) revolutionise ourunderstanding of the reverberation signal in a simple spectrum source; ii) allowfor the first time two independent spin methods to be tested in the same AGN. |
| Publications |
|
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2014-12-20T11:51:27Z/2015-01-16T20:09:29Z |
| Version | PPS_NOT_AVAILABLE |
| 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 | 2016-02-03T23:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "spin methods", "simple spectrum nls1", "additional component", "lag energy spectra", "soft xray excess", "sources apparently dominated", "pg 1244", "lag frequency", "spectral components", "spectral variability", "narrow line seyfert", "simple spectrum source", "xray time delays", "reverberation signal", "ionised reflection" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Mr William Alston, 2016, 'Understanding the X-ray Time delays in the simple spectrum NLS1: PG 1244+026', PPS_NOT_AVAILABLE, European Space Agency, https://doi.org/10.5270/esa-rgl6z6k |