3C286 is one of only 5 gamma-ray detected CSS and spectroscopically classifiedas NLS1 galaxy. It is thus a good laboratory for studying the disk-jetconnection. But our analysis of the previous few X-ray observations has raised apuzzle\: a single unabsorbed powerlaw with index 2 well fits the data but iseither inconsistent with the fact that 3C286 has a DLA with 2E+21 cm^-2, or withthe jet model for its SED. Thus, we propose for an observation to obtain for thefirst time ever a high S/N spectrum, aiming at measuring the absorption andsearching for the expected spectral break. Equally important, safely confirmingprevious evidence for variability would question its radio-calibrator status, ifthe variability can be traced back to the jet.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2021-12-17T05:40:41Z/2021-12-17T19:24:01Z
Version
19.16_20210326_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 Su Yao, 2023, 'The missing X-ray pieces of the puzzle of the gamma-ray CSS-NLS1 galaxy 3C286', 19.16_20210326_1200, European Space Agency, https://doi.org/10.57780/esa-hkigfkz
