A dataset provided by the European Space Agency

Name 040406
Title An Extended Hot Halo Gas Around M31
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0404060201
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0404060301

DOI 10.5270/esa-q83cghz
Author Prof Joel Bregman
Description Our nearest spiral galaxy neighbor, M31, has diffuse bulge emission and probably has an extended diffuse halo of hot gas, similar to that seen in other spiral galaxies. Unlike more distant spirals, where halo gas observations are photon-starved, a M31 halo will not suffer this problem, allowing the gas distribution to be measured and the temperature to be mapped with unprecedented accuracy. This will define halo gas properties, the disk-halo interface and it will be a powerful test of models. This X-ray halo can have a radial extent of 1 degree (10-15 kpc), so a mosaic of observations will be constructed along the minor axis, leveraging existing observations. By using overlapping fields, we will flat-field the data to the necessary precision.
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An XMM-Newton Survey of the Soft X-ray Background. I. The O VII and O VIII Lines Between l = 120 and l = 240 . Henley, David B., Shelton, Robin L., . ApJS . 187-388 . 2010 . 2010ApJS..187..388H ,
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Exospheric solar wind charge exchange as seen by XMM-Newton . Carter, J. A., Semba, S., . AN . 333-313 . 2012 . 2012AN....333..313C ,
Classification of X-Ray Sources in the XMM-Newton Serendipitous Source Catalog . Lin, Dacheng, Webb, Natalie A., . ApJ . 756-27 . 2012 . 2012ApJ...756...27L ,
An XMM-Newton Survey of the Soft X-Ray Background....
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2006-07-03T08:07:19Z/2006-07-03T21:02:44Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 2007-08-04T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2007-08-04T00:00:00Z, 040406, 17.56_20190403_1200. https://doi.org/10.5270/esa-q83cghz