A dataset provided by the European Space Agency

Name: Monitoring a close encounter between a small cloud and a supermassive BH
Published: 2016-05-06T22:00:00Z

Proposal ID	074363
Title	Monitoring a close encounter between a small cloud and a supermassive BH
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743630201 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743630301 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743630401 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743630501 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743630601 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743630701 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743630801 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0743630901
DOI	https://doi.org/10.5270/esa-dt0hzik
Principal Investigator, PI	Dr Gabriele Ponti
Abstract	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 theBH.s close environment and likely partially accreting. We propose 450 ks XMMobservations to: i) monitor the long term variations of the X-ray flux producedby Sgr A* as it interacts with the cloud; ii) monitor any variation, induced bythe 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 Galacticcentre matter distribution around Sgr A; iv) monitor the evolution of thesuperluminal echo reflected from the Bridge.
Publications	The X-ray outburst of the Galactic Centre magnetar SGR J1745-2900 during the first 1.5 year \|Coti Zelati, F., Rea, N., et al. \| MNRAS \| 449-2685 \| 2015 \| 2015MNRAS.449.2685C \| http://ui.adsabs.harvard.edu/#abs/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 al. \| MNRAS \| 454-1525 \| 2015 \| 2015MNRAS.454.1525P \| http://ui.adsabs.harvard.edu/#abs/2015MNRAS.454.1525P The puzzling orbital period evolution of the LMXB AX J1745.6-2901 \|Ponti, G., De, K., et al. \| MNRAS \| 464-840 \| 2017 \| 2017MNRAS.464..840P \| http://ui.adsabs.harvard.edu/#abs/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 al. \| MNRAS \| 465-45 \| 2017 \| 2017MNRAS.465...45C \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.465...45C A powerful flare from Sgr A* confirms the synchrotron nature of the X-ray emission \|Ponti, G., George, E., et al. \| MNRAS \| 468-2447 \| 2017 \| 2017MNRAS.468.2447P \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.468.2447P Polarization and long-term variability of Sgr A* X-ray echo \|Churazov, E., Khabibullin, I., et al. \| MNRAS \| 468-165 \| 2017 \| 2017MNRAS.468..165C \| http://ui.adsabs.harvard.edu/#abs/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 \| http://ui.adsabs.harvard.edu/#abs/2017A&A...604A..85M Probing the interstellar dust towards the Galactic Centre: dust-scattering halo around AX J1745.6-2901 \|Jin, Chichuan, Ponti, Gabriele, et al. \| MNRAS \| 468-2532 \| 2017 \| 2017MNRAS.468.2532J \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.468.2532J Sagittarius {\\rm{A}} High-energy X-Ray Flare Properties during NuStar Monitoring of the Galactic Center from 2012 to 2015 \|Zhang, Shuo, Baganoff, Frederick K., et al. \| ApJ \| 843-96 \| 2017 \| 2017ApJ...843...96Z \| http://ui.adsabs.harvard.edu/#abs/2017ApJ...843...96Z Chandra monitoring of the Galactic Centre magnetar SGR J1745-2900 during the initial 3.5 years of outburst decay \|Coti Zelati, F., Rea, N., et al. \| MNRAS \| 471-1819 \| 2017 \| 2017MNRAS.471.1819C \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.471.1819C Can Sgr A* flares reveal the molecular gas density PDF? \|Churazov, E., Khabibullin, I., et al. \| MNRAS \| 471-3293 \| 2017 \| 2017MNRAS.471.3293C \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.471.3293C NuSTAR + XMM-Newton monitoring of the neutron star transient AX J1745.6-2901 \|Ponti, G., Bianchi, S., et al. \| MNRAS \| 473-2304 \| 2018 \| 2018MNRAS.473.2304P \| http://ui.adsabs.harvard.edu/#abs/2018MNRAS.473.2304P A transient, flat spectrum radio pulsar near the Galactic Centre \|Dexter, J., Degenaar, N., et al. \| MNRAS \| 468-1486 \| 2017 \| 2017MNRAS.468.1486D \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.468.1486D A 149 min periodicity underlies the X-ray flaring of Sgr A* \|Leibowitz, Elia, \| MNRAS \| 474-3380 \| 2018 \| 2018MNRAS.474.3380L \| http://ui.adsabs.harvard.edu/#abs/2018MNRAS.474.3380L Effects of interstellar dust scattering on the X-ray eclipses of the LMXB AX J1745.6-2901 in the Galactic Centre \|Jin, Chichuan, Ponti, Gabriele, et al. \| MNRAS \| 477-3480 \| 2018 \| 2018MNRAS.477.3480J \| http://ui.adsabs.harvard.edu/#abs/2018MNRAS.477.3480J X-ray chimneys in the Galactic Centre \|Chernyakova, Masha, \| Natur \| 567-318 \| 2019 \| 2019Natur.567..318C \| http://ui.adsabs.harvard.edu/#abs/2019Natur.567..318C An X-ray chimney extending hundreds of parsecs above and below the Galactic Centre \|Ponti, G., Hofmann, F., et al. \| Natur \| 567-347 \| 2019 \| 2019Natur.567..347P \| http://ui.adsabs.harvard.edu/#abs/2019Natur.567..347P A Rapidly Varying Red Supergiant X-Ray Binary in the Galactic Center \|Gottlieb, Amy M., Eikenberry, Stephen S., et al. \| ApJ \| 896-32 \| 2020 \| 2020ApJ...896...32G \| http://ui.adsabs.harvard.edu/#abs/2020ApJ...896...32G The EXOD search for faint transients in XMM-Newton observations: Method and discovery of four extragalactic Type I X-ray bursters \|Pastor-Marazuela, I., Webb, N. A., et al. \| A&A \| 640-124 \| 2020 \| 2020A&A...640A.124P \| http://ui.adsabs.harvard.edu/#abs/2020A&A...640A.124P The Galactic center chimneys: the base of the multiphase outflow of the Milky Way \|Ponti, G., Morris, M. R., et al. \| A&A \| 646-66 \| 2021 \| 2021A&A...646A..66P \| http://ui.adsabs.harvard.edu/#abs/2021A&A...646A..66P Classification of 4XMM-DR9 sources by machine learning \|Zhang, Yanxia, Zhao, Yongheng, \| MNRAS \| 503-5263 \| 2021 \| 2021MNRAS.503.5263Z \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.503.5263Z Tracing the Milky Way.s Vestigial Nuclear Jet \|Cecil, Gerald, Wagner, Alexander Y., et al. \| ApJ \| 922-254 \| 2021 \| 2021ApJ...922..254C \| http://ui.adsabs.harvard.edu/#abs/2021ApJ...922..254C SRG/eROSITA view of X-ray reflection in the Central Molecular Zone: a snapshot in September-October 2019 \|Khabibullin, Ildar, Churazov, Eugene, \| MNRAS \| 509-6068 \| 2022 \| 2022MNRAS.509.6068K \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.509.6068K The episodic and multiscale Galactic Centre \|Bryant, Aaron, Krabbe, Alfred, \| NewAR \| 93-101630 \| 2021 \| 2021NewAR..9301630B \| http://ui.adsabs.harvard.edu/#abs/2021NewAR..9301630B Constraining particle acceleration in Sgr ASUP_OPEN\\u22c6SUP_CLOSE with simultaneous GRAVITY, Spitzer, NuSTAR, and Chandra observations \|GRAVITY Collaboration, Abuter, R., et al. \| A&A \| 654-22 \| 2021 \| 2021A&A...654A..22G \| http://ui.adsabs.harvard.edu/#abs/2021A&A...654A..22G X-ray astronomy comes of age \|Wilkes, Belinda J., Tucker, Wallace, et al. \| Natur \| 606-261 \| 2022 \| 2022Natur.606..261W \| http://ui.adsabs.harvard.edu/#abs/2022Natur.606..261W X-ray polarization evidence for a 200-year-old flare of Sgr ASUP_OPEN*SUP_CLOSE \|Marin, Fr\\u00e9d\\u00e9ric, Churazov, Eugene, et al. \| Natur \| 619-41 \| 2023 \| 2023Natur.619...41M \| http://ui.adsabs.harvard.edu/#abs/2023Natur.619...41M Scientific objectives of the Hot Universe Baryon Surveyor (HUBS) mission \|Bregman, Joel, Cen, Renyue, et al. \| SCPMA \| 66-299513 \| 2023 \| 2023SCPMA..6699513B \| http://ui.adsabs.harvard.edu/#abs/2023SCPMA..6699513B Iron K\\u03b1 echoes from the circumnuclear disk orbiting Sgr ASUP_OPEN\\u22c6SUP_CLOSE \|Stel, Giovanni, Ponti, Gabriele, \| A&A \| 679-44 \| 2023 \| 2023A&A...679A..44S \| http://ui.adsabs.harvard.edu/#abs/2023A&A...679A..44S The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way \|Sarkar, Kartick C., \| A&ARv \| 32-1 \| 2024 \| 2024A&ARv..32....1S \| http://ui.adsabs.harvard.edu/#abs/2024A&ARv..32....1S From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources \|Rodriguez, Antonio C., \| PASP \| 136-054201 \| 2024 \| 2024PASP..136e4201R \| http://ui.adsabs.harvard.edu/#abs/2024PASP..136e4201R Robust constraints on feebly interacting particles using XMM-Newton \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-L101305 \| 2024 \| 2024PhRvD.109j1305L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j1305L Multimessenger search for electrophilic feebly interacting particles from supernovae \|Luque, Pedro De la Torre, Balaji, Shyam, \| PhRvD \| 109-103028 \| 2024 \| 2024PhRvD.109j3028L \| http://ui.adsabs.harvard.edu/#abs/2024PhRvD.109j3028L Importance of Cosmic-Ray Propagation on Sub-GeV Dark Matter Constraints \|De la Torre Luque, Pedro, Balaji, Shyam, \| ApJ \| 968-46 \| 2024 \| 2024ApJ...968...46D \| http://ui.adsabs.harvard.edu/#abs/2024ApJ...968...46D
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 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.
Creator Contact	https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published	2016-05-06T22:00:00Z
Keywords	"", "XMM", "partially accreting", "xray flux", "flaring activity", "dubbed g2", "superluminal echo reflected", "light echo"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Gabriele Ponti, 2016, 'Monitoring a close encounter between a small cloud and a supermassive BH', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-dt0hzik