A dataset provided by the European Space Agency

Proposal ID 011092
Title NGC 4258: Spatial and spectral characterisation of emission components SSC_35
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0110920101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0110920201

DOI https://doi.org/10.5270/esa-w6c7bxl
Principal Investigator, PI Dr Michael Watson
Abstract GT- ROSAT observations of the active spiral galaxy NGC 4258 established avariety of different emission components: AGN contributions from nucleus andanomalous arms, point sources, diffuse emission from the bulge (surrounding theAGN), diffuse emission from the disk, and diffuse emission from the halo. XMMobservations of NGC 4258 will enable a detailed investigation of theseemission features. Using spatially resolved spectra we will accurately measuretemperature and absorption along the anomalous arms. This will tell us aboutthe orientation (depth) of the arms in the disk. Regions of outflowingmaterial can be traced, since we expect a drop of absorption and temperature.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2000-12-08T22:17:03Z/2000-12-09T06:14:39Z
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 2002-09-08T00:00:00Z
Keywords "NGC 4258", "ngc 4258", "XMM", "orientation depth", "emission components ssc_35", "spectral characterisation", "resolved spectra", "emission components", "outflowing material", "agn contributions", "ROSAT", "anomalous arms", "diffuse emission"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Michael Watson, 2002, 'NGC 4258: Spatial and spectral characterisation of emission components SSC_35', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-w6c7bxl