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

Contents] [Previous] [Next] [Alphabetical Tag List] [Index] . This section discusses the tags that let you specify positions for HTML content. LAYER . ILAYER . ... Use the LAYER tag to specify an absolute position for a block of content, and use the ILAYER tag to specify a relative position. ... HEIGHT=" height " . ... OnFocus=" JScode " . ... HEIGHT="height" specifies the height of the layer's clipping region and serves as the reference for setting the relative height of children layers. ...

The weight and positions for the objects on the rotary floor were obtained from ecastro on nov03 and used to plot the weight distribution on the rotary floor. ... The figure shows the weight distribution by turret position. ... Fig 1 top: Each object on the floor is plotted with its weight vs its turret position. Fig 1 middle: The weight is averaged by turret position quadrant to show the imbalance in weight distribution. ... The turret position is that of the receiver or read off of the drawing. ...

. Made using Google Earth 2007 . Above: The GMRT antennas of the central array from space. The white, blurry objects are the antennas dishes. Above: The GMRT antennas of the central array from space. The position of the antennas are maked by symbols. Above: The GMRT antennas of the outer array from space. The position of antennas are maked by symbols. Last modified: Tue Apr 24 18:19:47 EST 2007

Beijing Ancient Observatory . ... Credit Copyright: Judy Tobin Explanation: Did observatories exist before telescopes ? One example that still stands today is the Beijing Ancient Observatory in China . ... It is interesting to compare the above picture to one taken in 1895 . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ... A service of: LHEA at NASA / GSFC . ... U. Based on Astronomy Picture Of the Day ...

. On the plot the days are shown along X axis and Universal time along Y axis. The regions in the first satellite positions are shown by the regions symbols and colour. The time intervals of the conjugation between considered couple of the satellites during day are shown as a 'wide boxes'. The corresponding numerical file contains the coordinates of both satellites during magnetic conjugations. Dr. Victoria Prokhorenko . Modified 17 June 1999

... Ahmad, A., Jeffery, C.S. , 2004, ``Physical parameters of helium-rich subdwarf B stars from spectral energy distributions'', Astronomy and Astrophysics, 413, 323-327. Ahmad, A., Jeffery, C.S. , 2004, ``The evolution of helium-rich subdwarf-B stars'', Astrophysics and Space Science, 291, 253-260. Ahmad, A., Jeffery, C.S. , Fullerton, A.W., 2004, ``Discovery of a spectroscopic binary comprising two hot helium-rich subdwarfs'', Astronomy and Astrophysics, 418, 275-281. ...

... Slitless is configured to work primarily with the STIS G750L grism mode, but more modes can be defined by the user using a simple grism dispersion configuration file. 5. stecf.impol ­ an IRAF Imaging Polarimetry Reduction Package The impol package consists of five tasks to reduce, simulate and plot imaging linear polarimetry data taken with the HST instruments with polarizing facilities - currently FOC, NICMOS and WFPC2. ... Linear polarization and position angle images are required. ...

IRAF/STECF 2-D spectrum point source / background decomposition package . ... The general problem is one of spectral decomposition - of separating the spectra of the point sources from the background. ... The STECF IRAF layered package "specres" provides two tasks to extract point source spectra from 2-D images (either longslit, multislit or cross-dispersed) and decompose the full background over the image. ... A Point Source Function spectrum image is required as a 2-D spectrum. ...

Modules | ... Apache HTTP Server Version 2.4 . ... Some files in the modules/experimental directory under the Apache distribution directory tree are provided as an example to those that wish to write modules that use the Apache API. ... If you link it into your server, enable the "example-handler" handler for a location, and then browse to that location, you will see a display of some of the tracing the example module did as the various callbacks were made. ... Using the mod_example Module . ...

This module illustrates many of the aspects of the Apache 1.2 API and, when used, demonstrates the manner in which module callbacks are triggered by the server. ... Source File: mod_example.c . ... The files in the src/modules/example directory under the Apache distribution directory tree are provided as an example to those that wish to write modules that use the Apache API. ... Example . ... Uncomment the "AddModule modules/example/mod_example" line near the bottom of the src/Configuration file. ...

... The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem. ... Information on the NTP architecture, protocol and algorithms can be found in the Further Information and Bibliography page. The Building and Installing the Distribution page presents an overview of the procedures for compiling the distribution and installing it on a typical client or server. ...