| Name | 090259 |
| Title | 1ES 1927+654: Constraining the Late Stages of an Extreme Nuclear Transient |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0902590201 |
| DOI | https://doi.org/10.57780/esa-wnw05jb |
| Author | European Space Agency |
| Description | 1ES 1927+654, the first changing-look AGN caught in the act of changing phases, has undergone extreme spectral changes over the last 3 years, including the destruction and recreation of the X-ray corona, possibly due to a tidal disruption event in a pre-existing AGN accretion disk. The latest XMM-Newton observation is similar to the pre-outburst observation from May 2011, but reveals a hint of an iron line, which was notably missing in the 2011 observation. We propose one more simultaneous XMM-Newton/NuSTAR campaign of 1ES 1927+654, totaling 70 ks over two 35 ks observations, to probe the late-stage evolution of this paradigm-defying AGN. The hard X-ray spectrum will allow us to track the heating of a newly-formed corona for the first time and determine whether the iron line has appeared. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2022-07-26T20:30:54Z/2022-08-02T03:51:04Z |
| Version | 20.08_20220509_1852 |
| 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 | 2023-08-23T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2023, 1Es 1927+654: Constraining The Late Stages Of An Extreme Nuclear Transient, 20.08_20220509_1852, European Space Agency, https://doi.org/10.57780/esa-wnw05jb |