| Proposal ID | 040509 |
| Title | Probing the enigmatic nature of ULXs in NGC1313 with XMM-Newton |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0405090101 |
| 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 kT~0.2keV) 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(kT~2keV) 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 |
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| 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 |
| Last Update | 2025-01-27 |
| Keywords | "rapid spectral variability", "power spectra", "xray spectral", "slim disk regime", "spectral transition", "separated ulxs", "xmm newton", "NGC1313", "XMM-Newton", "short xmm newton", "slim disk kt", "2kev regime", "soft excess component", "XMM", "cool blackbody kt", "ngc1313 x", "energy curvature" |
| 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 |