Fast optical-infrared photometry applied to black hole transients has shown tobe one of the most powerful tools to probe the jets in its innermost regions.Extending this approach to accreting neutron stars (NS) we discovered duringAO17 the presence in 4U1728-34 of subsecond correlated variability between theX-ray and IR emission, arising most probably from a relativistic jet. Moreover,we also detected an IR burst lagging an X-ray burst, allowing us to measure theorbital period of the system. These new fascinating results open a new window onthe study of the accretion processes around NS. We ask to perform 6 (total 63ks)XMM pointings to be matched by 6 (total 14h) HAWK-I@VLT observations of 4U0614+09 and 4U 1728-34, 4U 1705-44 in order to explore the fast variability in NS.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2022-03-28T19:21:18Z/2022-03-29T02:17:04Z
Version
19.17_20220121_1250
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 Federico Vincentelli, 2023, 'Fast X-ray-IR variability in accreting neutron stars', 19.17_20220121_1250, European Space Agency, https://doi.org/10.57780/esa-n82eiuh
