| Proposal ID | 090259 |
| Title | 1ES 1927+654: Constraining the Late Stages of an Extreme Nuclear Transient |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0902590201 |
| DOI | https://doi.org/10.57780/esa-wnw05jb |
| Principal Investigator, PI | Ms Megan Masterson |
| Abstract | 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 thedestruction and recreation of the X-ray corona, possibly due to a tidaldisruption event in a pre-existing AGN accretion disk. The latest XMM-Newtonobservation is similar to the pre-outburst observation from May 2011, butreveals a hint of an iron line, which was notably missing in the 2011observation. We propose one more simultaneous XMM-Newton/NuSTAR campaign of 1ES1927+654, totaling 70 ks over two 35 ks observations, to probe the late-stageevolution of this paradigm-defying AGN. The hard X-ray spectrum will allow us totrack the heating of a newly-formed corona for the first time and determine whether the iron line has appeared. |
| Publications | No publications found for 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 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 | 2023-08-23T00:00:00Z |
| Keywords | "NuSTAR", "1es 1927", "XMM", "formed corona", "pre outburst", "nustar campaign", "iron line", "notably missing", "changing phases", "late stages", "paradigm defying agn", "hard xray spectrum", "XMM-Newton", "tidal disruption event", "xray corona", "nuclear transient", "xmm newton", "late stage evolution" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Ms Megan Masterson, 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 |