A dataset provided by the European Space Agency

Name 074363
Title Monitoring a close encounter between a small cloud and a supermassive BH


DOI 10.5270/esa-dt0hzik
Author Dr Gabriele Ponti
Description A gas cloud, dubbed G2, was recently discovered to be falling towards Sgr A*. This allows us to witness the unique occurrence of a cloud interacting with the BH.s close environment and likely partially accreting. We propose 4*50 ks XMM observations to: i) monitor the long term variations of the X-ray flux produced by Sgr A* as it interacts with the cloud; ii) monitor any variation, induced by the cloud flyby, to the frequency and intensity of Sgr A*.s flaring activity; iii) use the magnetar.s light echo and its variations to scan the Galactic centre matter distribution around Sgr A*; iv) monitor the evolution of the superluminal echo reflected from the Bridge.
Publication The X-ray outburst of the Galactic Centre magnetar SGR J1745-2900 during the first 1.5 year . Coti Zelati, F., Rea, N., et all. . MNRAS . 449-2685 . 2015 . 2015MNRAS.449.2685C ,
Fifteen years of XMM-Newton and Chandra monitoring of Sgr A*: evidence for a recent increase in the bright flaring rate . Ponti, G., De Marco, B., et all. . MNRAS . 454-1525 . 2015 . 2015MNRAS.454.1525P ,
The puzzling orbital period evolution of the LMXB AX J1745.6-2901 . Ponti, G., De, K., et all. . MNRAS . 464-840 . 2017 . 2017MNRAS.464..840P ,
Not that long time ago in the nearest galaxy: 3D slice of molecular gas revealed by a 110 yr old flare of Sgr A* . Churazov, E., Khabibullin, I., et all. . MNRAS . 465-45 . 2017 . 2017MNRAS.465...45C ,
A powerful flare from Sgr A* confirms the synchrotron nature of the X-ray emission . Ponti, G., George, E., et all. . MNRAS . 468-2447 . 2017 . 2017MNRAS.468.2447P ,
Polarization and long-term variability of Sgr A* X-ray echo . Churazov, E., Khabibullin, I., et all. . MNRAS . 468-165 . 2017 . 2017MNRAS.468..165C ,
Sixteen years of X-ray monitoring of Sagittarius A*: Evidence for a decay of the faint flaring rate from 2013 August, 13 months before a rise in the bright flaring rate . Mossoux, Enmanuelle, Grosso, Nicolas, . A&A . 604-85 . 2017 . 2017A&A...604A..85M ,
Probing the interstellar dust towards the Galactic Centre: dust-scattering halo arou...
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2014-08-30T19:20:01Z/2015-04-02T19:04:19Z
Version 17.56_20190403_1200
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2016-05-06T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2016-05-06T22:00:00Z, 074363, 17.56_20190403_1200. https://doi.org/10.5270/esa-dt0hzik