|Title||Catching the gas outflow during spin-downs of Her X-1|
|Author||Dr Dmitry Klochkov|
|Description||With the proposed observations we would like for the first time to make use of the known pulse period and X-ray flux behavior of Her X-1 (from Swift-BAT data) to test directly the promising hypothesis of the increased disc outflow during spin-down episodes which would change substantially our view of the torque-interaction in accreting pulsars. We propose "triggered observations" of Her X-1 in the middle of four main-on states: two pointings during strong spin-downs and two - outside the spin-down episodes (equilibrium state). Comparing the spectral data (mainly the intensity of the emission lines and thedepth of the absorption edges in the RGS spectra) would allow us to see the difference in the amount of outflowing gas between the two regimes.|
|Publication||Ensemble X-ray variability of active galactic nuclei. II. Excess variance and updated structure function . Vagnetti, F., Middei, R., et all. . A&A . 593-55 . 2016 . 2016A&A...593A..55V ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
An ionized accretion disc wind in Hercules X-1 . Kosec, P., Fabian, A. C., et all. . MNRAS . 491-3730 . 2020 . 2020MNRAS.491.3730K ,
|Instrument||EMOS1, EMOS2, EPN, OM, RGS1, RGS2|
|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.
|Publisher And Registrant||European Space Agency|
|Credit Guidelines||European Space Agency, 2013-04-24T00:00:00Z, 067351, 17.56_20190403_1200. https://doi.org/10.5270/esa-gqqu2nq|