A dataset provided by the European Space Agency

Proposal ID 020388
Title ULTRA-LUMINOUS X-RAY SOURCES IN THE BARRED SPIRAL GALAXY NGC 1672
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0203880101

DOI https://doi.org/10.5270/esa-j6mjsb0
Principal Investigator, PI Dr EDWARD COLBERT
Abstract The two very-luminous ULXs (LX greater than 2E39 erg/s) in NGC 1672 arepositioned precisely at the ends of the nuclear bar. The most luminous ULXs arethe most difficult to explain as normal X-ray binaries, and so are likely ULXcandidates for IMBHs. We propose a detailed study, for the first time, of theX-ray spectra of these two fascinating ULXs, to study their spectral featuresand compare with ULX model predictions. A comparison with XMM-Newton X-rayspectra of ULXs in non-barred spirals will allow an important test to see ifULXs in spiral bars have unique spectral properties.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-11-27T05:31:45Z/2004-11-27T19:23:38Z
Version 21.51_20241115_1113
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 2005-12-23T00:00:00Z
Last Update 2026-07-09
Keywords "spiral bars", "positioned precisely", "fascinating ulxs", "ngc 1672", "spectral properties", "XMM-Newton", "ulx candidates", "NGC 1672", "luminous ulxs", "xray spectra", "ulx model predictions", "XMM", "nuclear bar", "xray binary", "barred spirals", "2e39 erg"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr EDWARD COLBERT, 2005, 'ULTRA-LUMINOUS X-RAY SOURCES IN THE BARRED SPIRAL GALAXY NGC 1672', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-j6mjsb0
Rights Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.