A dataset provided by the European Space Agency

Name: Discovery of a QPO in the NGC55 ULX?
Published: 2011-06-16T00:00:00Z

Proposal ID	065505
Title	Discovery of a QPO in the NGC55 ULX?
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0655050101
DOI	https://doi.org/10.5270/esa-czkxp53
Principal Investigator, PI	Dr GULAB DEWANGAN
Abstract	We request a long (125ks) XMM-Newton observation of the ULX in the nearby galaxyNGC55. Previous short observations have revealed several unique aspects of thisULX. The temporal behavior of the ULX suggests a QPO at 1.5mHz and a powerspectrum break. Such temporal features have been observed only for three otherULXs. Moreover, the source undergoes frequent spectral transitions making it aunique ULX where characteristic temporal behavior can be studied in conjunctionwith spectral transitions. Such studies are crucial to understanding thedifferences/similarities between ULX and Galactic X-ray binaries. Furthermore,the ULX exhibits a series of strange and unexplained X-ray dips of duration~200s, whose nature can be revealed in spectral analysis of co-added dip data.
Publications	The ultraluminous state revisited: fractional variability and spectral shape as diagnostics of super-Eddington accretion \|Sutton Andrew D. Roberts Timothy P. \| MNRAS \| 435-1758 \| 2013 \| 2013MNRAS.435.1758S \| http://ui.adsabs.harvard.edu/#abs/2013MNRAS.435.1758S Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift \|Yershov V. N. \| Ap&SS \| 354-97 \| 2014 \| 2014Ap&SS.354...97Y \| http://ui.adsabs.harvard.edu/#abs/2014Ap&SS.354...97Y X-ray outbursts from a new transient in NGC 55 \|Jithesh V. Wang Zhongxiang \| MNRAS \| 448-1973 \| 2015 \| 2015MNRAS.448.1973J \| http://ui.adsabs.harvard.edu/#abs/2015MNRAS.448.1973J A spectral-timing model for ULXs in the supercritical regime \|Middleton Matthew J. Heil Lucy et al. \| MNRAS \| 447-3243 \| 2015 \| 2015MNRAS.447.3243M \| http://ui.adsabs.harvard.edu/#abs/2015MNRAS.447.3243M Non-detection of X-ray emission from sterile neutrinos in stacked galaxy spectra \|Anderson Michael E. Churazov Eugene \| MNRAS \| 452-3905 \| 2015 \| 2015MNRAS.452.3905A \| http://ui.adsabs.harvard.edu/#abs/2015MNRAS.452.3905A Diagnosing the accretion flow in ultraluminous X-ray sources using soft X-ray atomic features \|Middleton Matthew J. Walton Dominic J. et al. \| MNRAS \| 454-3134 \| 2015 \| 2015MNRAS.454.3134M \| http://ui.adsabs.harvard.edu/#abs/2015MNRAS.454.3134M Transient X-Ray Source Population in the Magellanic-type Galaxy NGC 55 \|Jithesh V. Wang Zhongxiang \| ApJ \| 821-24 \| 2016 \| 2016ApJ...821...24J \| http://ui.adsabs.harvard.edu/#abs/2016ApJ...821...24J The Million Optical - Radio/X-ray Associations (MORX) Catalogue \|Flesch Eric W. \| PASA \| 33-52 \| 2016 \| 2016PASA...33...52F \| http://ui.adsabs.harvard.edu/#abs/2016PASA...33...52F Pulsator-like Spectra from Ultraluminous X-Ray Sources and the Search for More Ultraluminous Pulsars \|Pintore F. Zampieri L. et al. \| ApJ \| 836-113 \| 2017 \| 2017ApJ...836..113P \| http://ui.adsabs.harvard.edu/#abs/2017ApJ...836..113P From ultraluminous X-ray sources to ultraluminous supersoft sources: NGC 55 ULX the missing link \|Pinto C. Alston W. et al. \| MNRAS \| 468-2865 \| 2017 \| 2017MNRAS.468.2865P \| http://ui.adsabs.harvard.edu/#abs/2017MNRAS.468.2865P Ultrafast outflows in ultraluminous X-ray sources \|Pinto C. Fabian A. et al. \| AN \| 338-234 \| 2017 \| 2017AN....338..234P \| http://ui.adsabs.harvard.edu/#abs/2017AN....338..234P Thermal stability of winds driven by radiation pressure in super-Eddington accretion discs \|Pinto C. Mehdipour M. et al. \| MNRAS \| 491-5702 \| 2020 \| 2020MNRAS.491.5702P \| http://ui.adsabs.harvard.edu/#abs/2020MNRAS.491.5702P Linking Soft Excess in Ultraluminous X-Ray Sources with Optically Thick Wind Driven by Supercritical Accretion \|Qiu Yanli Feng Hua \| ApJ \| 906-36 \| 2021 \| 2021ApJ...906...36Q \| http://ui.adsabs.harvard.edu/#abs/2021ApJ...906...36Q 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 Ionized emission and absorption in a large sample of ultraluminous X-ray sources \|Kosec P. Pinto C. et al. \| MNRAS \| 508-3569 \| 2021 \| 2021MNRAS.508.3569K \| http://ui.adsabs.harvard.edu/#abs/2021MNRAS.508.3569K A transient ultraluminous X-ray source in NGC 55 \|Robba A. Pinto C. et al. \| MNRAS \| 515-4669 \| 2022 \| 2022MNRAS.515.4669R \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.515.4669R Unveiling the disc structure in ultraluminous X-ray source NGC 55 ULX-1 \|Barra F. Pinto C. et al. \| MNRAS \| 516-3972 \| 2022 \| 2022MNRAS.516.3972B \| http://ui.adsabs.harvard.edu/#abs/2022MNRAS.516.3972B Winds in ultraluminous Xu2011ray sources: New challenges \|Pinto C. Kosec P. \| AN \| 344-20220134 \| 2023 \| 2023AN....34420134P \| http://ui.adsabs.harvard.edu/#abs/2023AN....34420134P Ultraluminous X-ray sources \|King Andrew Lasota Jean-Pierre \| NewAR \| 96-101672 \| 2023 \| 2023NewAR..9601672K \| http://ui.adsabs.harvard.edu/#abs/2023NewAR..9601672K 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	2010-05-24T07:25:00Z/2010-05-25T18:48:57Z
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	2011-06-16T00:00:00Z
Last Update	2025-01-27
Keywords	"characteristic temporal", "power spectrum break", "XMM-Newton", "spectral transitions", "galactic xray binary", "NGC55", "nearby galaxy ngc55", "XMM", "125 xmm newton", "ngc55 ulx ?.", "spectral analysis", "unexplained xray dips"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr GULAB DEWANGAN, 2011, 'Discovery of a QPO in the NGC55 ULX?', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-czkxp53