Overlapping Astronomical Sources : Utilizing Spectral Information David Jones Advisor: Xiao-Li Meng Collaborators: Vinay Kashyap (CfA) and David van Dyk (Imperial College) CHASC Astrostatistics Group April 15, 2014 1 / 30 Introduction X-ray telescope data : spatial co ordinates of photon detections photon energy Instrument error: diffraction in the telescope means recorded photon positions are spread out according to the point spread function ...

Next: Examples and Photometric Up: Image Restorations of High Previous: Introduction . ... where is the intensity of the point sources (mainly zero apart from -functions at the positions of designated sources) and is the intensity of the background. ... When is zero the objective function becomes the same as that of the standard Lucy-Richardson technique. takes the form of an entropy expression which may be calculated in two ways, relative to a flat background: . ...

... Next: Cheating Poisson: A Up: Statistical Analysis Previous: Spatial Models and . ... The spatial distribution of stars in the Local Group dwarf irregular galaxy NGC 6822 has been studied, using recent positions and deep photometry for about 15,000 stars in the galaxy. Based on photometrical data, OB stars and red stars could be studied separately. Spatial statistical tools have been applied to the analysis of the spatial structure. ... Figure: Model selection by the aid of CAIC . ...

Contents] [Prev page] [Next page] [Index] . ... Positioning HTML Content Using Styles . Positioning HTML Content Using the <LAYER> Tag . ... Absolute Positioning . ... Creating Positioned Blocks of Content Dynamically . Writing Content in Positioned Blocks . ... Positioning the Flower Layers . Positioning and Moving the Fish and Poles . Defining the onLoad Handler for the BODY Element . ... Adding Another Layer to Contain the Reverse Fish Image . ... The Initialization Functions . ...

... POSANG= Enter position angle major axis: [ 0.0 ] OUTPOS= Enter rotation center in grids: [ 0.0 0.0 ] BOX = Give box in ..... [entire subset] Enter a box for the rotated set (see description) TABLEFILE= Enter output filename for densities: [ RADIAL .DAT] GUESS= Enter initial estimate: [L] Enter one of: L = Linear Regression E = Exponential Decreasing G = Gaussian Distribution F = Flat Distribution SCF= ... The method needs an initial estimate for the distribution. ...

. Next: Initial velocity Up: Space and velocity distributions Previous: Space and velocity distributions . Following Paczynsky (1990), we assume initial space distribution of young neutron stars to be varying exponentially with distance from the Galactic center and from the Galactic plane, that is probability distribution for young neutron star positions can be written in the form . with kpc, and pc. Mike E. Prokhorov . Fri Jul 19 19:16:07 MSD 1996

. Moscow Mathematical Journal . Published by the Independent University of Moscow . Editors: Yulij Ilyashenko and Michael Tsfasman . MMJ homepage has been moved to new location: www.ams.org/distribution/mmj/ . Download abstracts of volumes 1-2 (2001-2002) [ PDF 312 K ] . Moscow Mathematical Journal . is distributed by the . American Mathematical Society for the . Independent University of Moscow . Online ISSN 1609-4514 . 2002, Independent University of Moscow . Comments: mmj@mccme.ru

. XMM-Newton Science Analysis System . arfgen (arfgen-1.75.6) [???] . Meta Index / Home Page / Usage and Examples . Here is another example with an explicit source position - (1000,-1000) in DET coordinates - specified: . arfgen spectrumset=spectrum.pha . withsourcepos=true sourcecoords=det sourcex=1000 sourcey=-1000 . See also 7.4 for details of why the task needs the source position, and how to change it. XMM-Newton SOC/SSC -- 2008-10-22