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 (virgul24 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.
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.
European Space Agency, Dr Kajal Ghosh, 2008, 'NGCvirgul4736: Host of exotic Ultraluminous X-ray sources', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-g1zh0lu
