exsas/users-guide

	Max-Planck-Institut für extraterrestrische Physik exsas/users-guide

Deutsche Version	MPE HEG X-Ray Astronomy Wave ROSAT
X-Ray Astronomy Wave ROSAT The X-ray Satellite ROSAT Highlights Gallery Publications Workshops Calibration Timeline Processing News ROSAT Results Archive Catalogues ROSAT Link & Surf XMM-Newton Chandra Other Projects Data Center Exsas Search Impressum Contact	Footnotes Foreword to edition 5 1.3 Satellite Data Flow Multi Source Fit to Image Data Determine Source Counts Determine Upper Limits for Counts Calculate Source Count Rates Calculate Hardness Ratios Determine Source Extent with the ML detection Determine Average Off-Axis Angle of a Source Calculation of the Point Spread Function Probability or Quantile Creation of a Point Spread Function Model Profile Source Extent 1.4 The ROSAT Science Data Centres (RSDC) Calculate Linear Intensity Profiles Calculate Radial Intensity Profiles Calculate Azimuthal Intensity Profiles Calculate Counts within a Box Calculate Counts within a Circle Calculate Intensity Contours Equatorial, Ecliptic and Galactic Coordinates Create a User defined Source Table Plot Source List Positions Label Source List Positions 1.5 Standard Data Processing Plot Coordinate Grids into the Display and Graphics Windows Get Coordinates by Cursor Screen an Image by a Mask Sources partially obscured by the PSPC Window Support Structure Alignment of an Image to a Reference Image Adding a Contour Image to a Reference Image Plotting Sources on an All-Sky Aitoff Grid Create a Simulated Observation 5.3 Command Syntax and Data Handling of the Spatial Analysis Parameter Files 1.6 Extended Data Evaluation with EXSAS General Structure Creating and Modifying Extended Parameter Files Command Overview 5.4 Spatial Properties of the ROSAT Instruments Point Spread Functions and Associates The Point Spread Function for the ROSAT XRT-PSPC imaging unit The Point Spread Function for the ROSAT XRT-HRI The Point Spread Function for the ROSAT XUV-WFC The ROSAT Survey point spread function 1.7 ROSAT Archives The vignetting corrected ROSAT survey point spread function Survey Point Spread Function based on the Gauss Approximation of the PSF Additional ROSAT Calibration Files Vignetting Function Instrument Map Exposure Map 5.5 Input and Output Files Input Files Output Files Cleanup Data Rights Header Information Relevant Descriptors from the General Header List of Input/Output File Names 5.6 Relevant Products from the Standard Analysis Images Source Tables 5.7 Data Analysis Methods (Detection Thresholds) Spectral Analysis 6.1 Examples for Reducing Spectra Power Law Fit to a Point Source Internal ROSAT Archive (XRT) Chi-square Grid Search Calculation of Photon Flux Spectrum Calculation of Photon and Energy Flux Calculation of a total Count Rate Calculation of Luminosity Calculation of Energy Flux from a Count Rate 6.2 Tasks of the Spectral Analysis Preparations Fitting of Spectra Calculation of a Model Spectrum ROSAT Data Archive (RDA) for XRT observations Integrated Flux Density and Luminosity Arithmetic with Spectra ( + - / & ) Simultaneous Fitting of Spectra from different Instruments Simulation of a Spectrum Additional Errors 6.3 Commands and Parameter File of the Spectral Analysis Commands Parameter File General Keywords Model related Keywords Data Archive for WFC Observations Additive models Additive Models (normalized to energy flux) Additive Models (normalized to luminosity, ) Multiplicative Models Spectral Models Source Models (additive) power law broken-power law curved-power law exponential ROSAT Result Archive (RRA) for XRT observations power law exponential thermal bremsstrahlung black body (Planck spectrum) disk black body comptonization (Sunyaev-Titarchuk) thermal plasma (Raymond-Smith - quick mode) thermal plasma (Raymond-Smith - He and metal abundances) thermal plasma (Raymond-Smith - individual abundances) thermal plasma (Raymond-Smith - full code) thermal plasma (Mewe-Kaastra - solar abundances) Foreword to edition 1 Data Retrieval thermal plasma (Mewe-Kaastra - variable abundances) Gaussian line Asymmetric Gaussian line Constant (white spectrum) User defined source model Source Models (normalized to unabsorbed energy flux, additive) power law broken power law exponential exponential power law Possible Publication Conflicts thermal bremsstrahlung black body (Planck spectrum) Gaussian line Source Models (normalized to luminosity, additive) power law broken power law exponential exponential power law thermal-bremsstrahlung black body (Planck spectrum) The EXSAS/MIDAS Environment Absorption Models (multiplicative) galactic absorption (standard absorption - Morrison-McCammon) galactic absorption (interstellar absorption, abundances - Morrison-McCammon) source absorption (intrinsic absorption - Krolik-Kallman) source absorption (single absorption edge) source absorption (single absorption edge, alternative) absorption (absorption trough) scale factor user defined absorption model User Defined Models 2.1 EXSAS Structure 6.4 Files related to the Spectral Analysis Input Data Files Calibration Files Corrected Effective Area Detector Response Matrix Files associated with Spectral Models Raymond-Smith (quick mode) Raymond-Smith (He and metal abundances) Raymond-Smith (full code) Raymond-Smith (variable abundances) 2.2 MIDAS Environment Mewe-Kaastra Output Data Files Spectrum (folded and unfolded) Fitted Parameters Grid Spectral Header Output key words 6.5 Spectral Properties of the ROSAT PSPC 6.6 Products of the Standard Data Processing (ROSAT) Timing Analysis 2.3 Data Structures 7.1 Typical Sessions for Determining Time Variabilities Known-in-advance Period Detection Period Search - the Quest for a Peak Is my Source constant? 7.2 The Timing Analysis Commands Introduction Input Data Formats Parameter File general Format Folding Search - Phase Dispersion Conversion from Spacecraft Clock to Julian Day Files Arrival Time Correction Folding Search - Period Folding Power Spectrum Analysis Segmented Power Spectrum Long Power Spectrum Autocorrelation Analysis Crosscorrelation Analysis Variability Analysis Plot of Power Spectra Plot of ACFs Photon Event Tables Plot of CCFs Signal Detection in Power Spectra Frequency-Time Image Handling Frequency-Time Image Conversion to rms Frequency-Time Image Display Plot of Kolmogorov-Smirnov Output Integration of chi-square Distribution Plot of Light Curves Plot of accepted Times Intervals Plot of folded Light Curves Binned data sets Appendices Relevant Documents MIDAS Standard Headers EXSAS Standard Headers ROD Files (PSPC) ROD Files (HRI) EXSAS Data Areas F.1 EXSAS Calibration Area F.2 Test Data Area 1 (LMC field - PSPC) F.3 Test Data Area 2 (UMA CLOUD - WFC) File Headers F.4 Test Data Area 31 (AR-LAC - HRI) F.5 Test Data Area 32 (AR-LAC - PSPC) Files Contained in the RDF Packet ROSAT Online Services H.1 On-Line Services at the German RSDC Information Services ROSAT Data Archive (RDA) Interactive Access (BROWSE) H.2 On-Line Services at the German XUV Data Center Information Services Contents MIDAS Standard Headers Archived Data H.3 On-Line Services at GSFC HEASARC Services The ROSAT Anonymous FTP Account MIPS H.4 On-Line Services at the UK ROSAT Data Archive Centre (UKRDAC) Information Services ROSAT Data Archive References Index EXSAS Standard Headers 2.4 EXSAS Data Areas 2.5 Help Utilities 2.6 EXSAS Support 2.7 Documentation 2.8 EXSAS Distribution Policy 2.9 Acknowledgement Data Input to EXSAS 3.1 General Considerations Abbreviations 3.2 How to input Data 3.3 The ROSAT Data Sets in EXSAS Data Preparation 4.1 Examples of Typical Sessions - Preparation of relevant Data Sets Creating Sky Images Creating Light Curves Creating Spectra Extended Source Crowded Field Hardness Ratio List of Tables 4.2 Preparation Tasks Spatial Binning into Images Profiles Spectral Binning Time Binning into Light Curves Instrument Correction and Background Subtraction for Spectra Instrument Correction and Background Subtraction for Light Curves Selection of Events 4.3 Preparation Command Syntax and Data Handling Projection Commands List of Figures INPUT SELECT BIN OUTPUT Projection Command Files Projection Pipelines Correction Commands Correction Background subtraction SET/PROJECTION CORRECT ROSAT Mission Overview CREATE/PARFIL CORRECT PREPARE REMOVE/PARTICLES Creation of Exposure Maps Utilities Spatial Analysis 5.1 Examples of Typical Sessions for Source Detection Source Detection - an overview Source Detection on PSPC data 1.1 Introduction Source Detection on HRI data Local and Map Source Detection on WFC data Get Extent of a Source Determine Galactic Coordinates of Sources 5.2 Tasks of the Spatial Analysis Determine Background Counts per Pixel Create Smoothed Background Image Determine Total Field of View Background Spectrum Create Images for Source Detection Detect Sources using Local Background 1.2 The ROSAT Instruments Detect Sources using Background from Smoothed Background Image Merging of Source Tables Detect Sources with the Maximum Likelihood Method Merging of Source Lists after the Maximum Likelihood Detection All Source Detection Done with one Command Quick Visual Check of the Results of the ML Detection Creation of a Maximum Likelihood Image Creation of Position Grid Table Applying the Maximum Likelihood Detection to the Position Grid Table Conversion of Source Detection Lists © X-Ray Group at MPE (group) last update:1998/07/10 09:21:57, editor of this page:Ortwin Schwentker
	© Max-Planck-Institut für extraterrestrische Physik