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From: Pedro Rodriguez <Pedro.Rodriguez@sciops.esa.int>
Subject: XMM Publication
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Date: Thu, 03 Dec 2009 08:13:17 +0000
From: Pedro Rodriguez <Pedro.Rodriguez@sciops.esa.int>
To: xmmhelp@sciops.esa.int
Subject: XMM Publication
Hello,

regarding your query about new XMM-Newton results, I advertise here our
recently accepted paper:

XMM-Newton and INTEGRAL analysis of the Ophiuchus cluster of galaxies
J. Nevalainen et al., 2009
Accepted for publication in Astronomy and Astrophysics
arXiv:0910.1364

We investigated the non-thermal hard X-ray emission in the Ophiuchus
cluster of galaxies. Our aim was to characterise the physical properties
of the non-thermal component and its interaction with the cosmic
microwave background. We performed spatially resolved spectroscopy and
imaging using XMM-Newton data to model the thermal emission. Combining
this with INTEGRAL ISGRI data, we modeled the 0.6-140 keV band total
emission in the central 7 arcmin region. The models that best describe
both PN and ISGRI data contain a power-law component with a photon index
in a range 2.2-2.5. This component produces ~10% of the total flux in
the 1-10 keV band. The pressure of the non-thermal electrons is ~1% of
that of the thermal electrons. Our results support the scenario whereby
a relativistic electron population, which produces the recently detected
radio mini-halo in Ophiuchus, also produces the hard X-rays via inverse
compton scattering of the CMB photons. The best-fit models imply a
differential momentum spectrum of the relativistic electrons with a
slope of 3.4-4.0 and a magnetic field strength B=0.05-0.15 microG. The
lack of evidence for a recent major merger in the Ophiuchus center
allows the possibility that the relativistic electrons are produced by
turbulence or hadronic collisions.


Jukka Nevalainen





xmm-news-admin@sciops.esa.int wrote:
 > _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
 > _/                                                                _/
 > _/          XMM-NEWTON   NEWS   #99  ---   02-Dec-2009            _/
 > _/                                                                _/
 > _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
 >
 >              XMM-Newton Science Operations Centre at
 >               ESA's European Space Astronomy Centre,
 > P.O. Box - Apdo. 78, 28691 Villanueva de la Canada, Madrid, Spain
 >
 > _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
 >
 > SOC Home Page:
 >  http://xmm.esac.esa.int/
 > Helpdesk web interface:
 >  http://xmm.esac.esa.int/external/xmm_user_support/helpdesk.shtml
 > Helpdesk email address:
 >  xmmhelp@sciops.esa.int
 > News Mailing List:
 >  http://xmm.esac.esa.int/external/xmm_news/news_list/index.php
 >
 > _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
 >
 > Contents:
 >
 >  - Update of the BiRD Database
 >  - User Guide to the XMM-Newton SAS: update
 >  - Please alert us to significant XMM-Newton results
 >  - ESAC Trainee Opportunities
 >  - EXSA, a new science archive for EXOSAT
 >
 >
 > Update of the BiRD Database
 > ===========================
 >
 > The  BiRD database  has been  updated to  include all  the  RGS public
 > observations  taken until  September 1st  2009. It  contains  now 6300
 > spectra of 2700 different objects.
 >
 > BiRD is  an utility to  browse and examine  RGS data.  Spectra  can be
 > selected through  different parameters,  such as date  of observation,
 > class of  object or level of  exposure. BiRD also  provides some basic
 > plotting  and  visualisation  tools,  both  for the  RGS  spectra  and
 > spectral images, and for the EPIC-pn images taken in parallel.
 >
 > BiRD is available at the following URL:
 >
 > http://xmm.esac.esa.int/BiRD/
 >
 > Questions   and  comments   about  this   utility  can   be   sent  to
 > BiRD@sciops.esa.int
 >
 >
 > User Guide to the XMM-Newton SAS: update
 > ========================================
 >
 > XMM-Newton SOC  has updated the  User Guide to the  XMM-Newton Science
 > Analysis  System  for SAS  version  9.0.  The  guide is  available  in
 > different  formats  (postscript, pdf  and  html)  from the  XMM-Newton
 > Proposer's Info & Manuals Web page (Section: Data Analysis) at:
 >
 > http://xmm.esac.esa.int/external/xmm_user_support/documentation/
 >
 >
 > Pl

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