A dataset provided by the European Space Agency

Name: NGC~4736: Host of exotic Ultraluminous X-ray sources
Published: 2008-08-29T00:00:00Z

Proposal ID	040498
Title	NGC~4736: Host of exotic Ultraluminous X-ray sources
Download Data Associated to the proposal	https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0404980101 https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0404980201
DOI	https://doi.org/10.5270/esa-g1zh0lu
Principal Investigator, PI	Dr Kajal Ghosh
Abstract	We have detected four Ultraluminous X-ray Sources (ULXs) in the nearestearly-type galaxy NGC4736 (M94). For the first time, we have detected a highlyblueshifted OVIII line in the spectrum of a ULX, which is in accordance with thepredictions of our geometrical beaming model. We have also detected a possibleperiodic (~24 ks) ULX and another two ULXs, which are the most promisingintermediate mass black hole systems (based on our multiwavelength results). Toconfirm these exciting results and/or to detect them at different spectralstates with contemporaneous radio and optical data, which we will arrange, wepropose 48 ks XMM-Newton observations of this galaxy.
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Instrument	EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage	2006-11-27T16:26:39Z/2006-11-28T11:09:25Z
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	2008-08-29T00:00:00Z
Last Update	2025-01-27
Keywords	"optical data", "geometrical beaming model", "xmm newton", "M94", "XMM-Newton", "NGC", "XMM", "blueshifted oviii line"
Publisher And Registrant	European Space Agency
Credit Guidelines	European Space Agency, Dr Kajal Ghosh, 2008, 'NGC~4736: Host of exotic Ultraluminous X-ray sources', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-g1zh0lu