A dataset provided by the European Space Agency

Proposal ID 040509
Title Probing the enigmatic nature of ULXs in NGC1313 with XMM-Newton
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0405090101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0405090201
DOI https://doi.org/10.5270/esa-0bq5ofz
Principal Investigator, PI Dr Gulab Dewangan
Abstract We propose a 120ks observation of NGC1313 to investigate the nature of the twoULXs in this galaxy. NGC1313 X-1 and X-2 are amongst only a handful of thebrightest and well separated ULXs that show unusual X-ray spectral behavior andprovide the best candidates to probe the slim disk regime. For NGC1313 X-1, ourpresent analysis of the existing, short XMM-Newton observations reveal a cool(blackbody kTvirgul0.2keV) soft excess component and a high energy curvature or acutoff at 7keV; for X-2, these data reveal an unusual spectral transition,possibly from a high/soft or very high state to a higher flux, slim disk(kTvirgul2keV) regime. The observation will not only determine the accurate shape ofthe energy and power spectra, but also help to probe the soft excess component through rapid spectral variability.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2006-10-15T23:44:33Z/2006-10-17T13:15:16Z
Version PPS_NOT_AVAILABLE
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 2007-11-21T00:00:00Z
Keywords "2kev regime", "short xmm newton", "energy curvature", "ngc1313 x", "XMM", "power spectra", "cool blackbody kt", "slim disk kt", "rapid spectral variability", "xray spectral", "spectral transition", "slim disk regime", "separated ulxs", "XMM-Newton", "soft excess component", "NGC1313", "xmm newton"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Gulab Dewangan, 2007, 'Probing the enigmatic nature of ULXs in NGC1313 with XMM-Newton', PPS_NOT_AVAILABLE, European Space Agency, https://doi.org/10.5270/esa-0bq5ofz