We propose continued long-term multi-epoch ultraviolet spectroscopy ofASASSN-14li, a stellar tidal disruption event (TDE) at virgul90 Mpc. Such a bright,nearby stellar TDEs provides an exceptional opportunity to study broad emissionlines which describe the abundances and accretion flow of the stellar debris inone of the most important physical regimes for understanding basic TDE behavior.We also request brief XMM observations to constrain the high-energy spectralevolution on similar timescales. These observations will build upon surprisingnew results, and will provide an important foundation for follow-up of moreambiguous TDE candidates subsequently identified by LSST and WFIRST at higherredshifts.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2018-12-10T12:53:10Z/2019-06-07T04:03:30Z
Version
17.56_20190403_1200
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.
European Space Agency, Dr Peter Maksym, 2020, 'Continued Long-Term Ultraviolet Spectroscopy of a Tidal Disruption Event at only', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-lysar5d
