XSPEC User's Guide

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24 DUMMY: 0.1 50. 50 log # # Chatter Level: Console chatter level then log chatter level. Currently (4/2001) # logging has not been reimplemented. # CHAT: 10 10 # # photo absorption cross section table setting. # possible values are vern, bcmc, obmc. XSECT: bcmc # # solar abundance table indicator. Hard coded solar abundance vector. Choices are # 'feld' Feldman, U., 1992. Physica Scripta, 46, 202. # 'angr' is from Anders, E. & Grevesse, N., 1989. Geochimica and Cosmochimica Acta 53, 197. # 'aneb' is from Anders, E. & Ebihara, 1982. Geochimica and Cosmochimica Acta 46, 2363. # 'file' is from a file read in by the user, but is not yet implemented (4/2001) # ABUND: angr # # fitting method (leven | anneal ...) # METHOD: leven # # statistic to be minimized (chi | cstat) # STATISTIC: chi # # weighting technique (standard | gehrels | churazov | model ) # WEIGHT: standard # # If true, fitting algorithm will calculate parameter derivatives # numerically. If false, a faster analytic expression will be used, # if applicable to the current fitting statistic.
25 # USE_NUMERICAL_DIFFERENTIATION: false # # cosmology parameters ( H0, q0, lambda0 ) # COSMO: 70. .0 .73 # # # Default graphics package (PLT is currently the only option). # GRAPH: plt # # Default plotting device (e.g. for PGPLOT) # PLOTDEVICE: /null # # Y-axis plotting units when in setplot wave mode (angstrom, hz) # WAVE_PLOT_UNITS: hz # # User scripting directory # USER_SCRIPT_DIRECTORY: $HOME/.xspec A copy of this file is placed in the $HOME/.xspec directory on XSPEC12’s first start-up or when it is not found. After this users can modify settings such as default cosmology or the energy range for dummy response for their own requirements. This is also the place where users can select if they want to view PDF help files from the XSPEC distribution or HTML either locally or from the HEASARC site. Setting USE_ONLINE_HELP to true uses the remote HTML files while false will use either PDF or HTML local files depending on the value of LOCAL_HELP_FORMAT. The PDF_COMMAND and HTML_COMMAND entries determine which applications are run for the two viewing cases. The HTML_COMMAND value should typically just be the name of a web browser, or “open” for Mac OS X users. The default settings for the PDF_COMMAND entry are what work best for launching Adobe Acrobat Reader 7.0.x on Linux/Unix systems. For those launching earlier versions, the “- openInNewWindow” flag should be replaced with “-useFrontEndProgram”. For Mac users, again we recommend the entire entry simply be replaced with “open”. The second file that is searched for is the xspec.rc file. This contains users’ own customizations, for example Tcl or XSPEC command abbreviations, packages to be
Page 1 and 2: An X-Ray Spectral Fitting Package U
Page 3 and 4: iii 3.9.1 What to do when you have
Page 5 and 6: v 5.7.3 iplot: make a plot, and lea
Page 7 and 8: vii 6.2.67 step: step function conv
Page 9 and 10: Updates to the manual July 2009 (v1
Page 11 and 12: 1 1. XSPEC XSPEC is a command-drive
Page 13 and 14: 3 1.2 How to find out more informat
Page 15 and 16: 5 2. Spectral Fitting and XSPEC 2.1
Page 17 and 18: 7 These components are used i
Page 19 and 20: 9 may be ignored. This can be chang
Page 21 and 22: 11 • Auxiliary Responses: callib/
Page 23 and 24: 13 Bevington, P.R., 2002, 3 rd Edit
Page 25 and 26: 15 Model commands define and manipu
Page 27 and 28: 17 3.7 Data Commands XSPEC is desig
Page 29 and 30: 19 3.8.1 Models with multiple respo
Page 31 and 32: 21 additive model components on dat
Page 33: 23 #LOCAL_MODEL_DIRECTORY: /path/to
Page 37 and 38: 27 %xspec XSPEC12>data s54405.pha 1
Page 39 and 40: 29 cutoffpl disk diskbb diskline di
Page 41 and 42: 31 Figure B: The result of the comm
Page 43 and 44: 33 Figure C: The result of the comm
Page 45 and 46: 35 such as iron emission lines and
Page 47 and 48: 37 XSPEC12>mo pha(br) Model: phabs[
Page 49 and 50: 39 XSPEC12>fit ... ----------------
Page 51 and 52: 41 XSPEC12>thaw 4 Number of variabl
Page 53 and 54: 43 Null hypothesis probability = 0.
Page 55 and 56: 45 mission; however, it has now bee
Page 57 and 58: 47 1 1 1 phabs nH 10^22 0.2574 +/-
Page 59 and 60: 49 Here, the first group makes up t
Page 61 and 62: 51 --------------------------------
Page 63 and 64: 53 using response (RMF) file... s0c
Page 65 and 66: 55 The first thing we'll do is chan
Page 67 and 68: 57 selecting the "PHA" output optio
Page 69 and 70: 59 ________________________________
Page 71 and 72: 61 effects of the coded-mask. The l
Page 73 and 74: 63 particular background model empl
Page 75 and 76: 65 One might then make a second pas
Page 77 and 78: 67 5. XSPEC commands 5.1 Summary of
Page 79 and 80: 69 Command Category Description goo
Page 81 and 82: 71 Command Category Description rth
Page 83 and 84: 73 //This setting essentially disab
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75 If no is given, then the file s
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77 XSPEC12> show rparameters // All
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79 8. search failed in +ve directio
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81 solab stat statmethod steppar st
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83 5.4 Data Commands 5.4.1 arf: cha
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85 is equivalent to no correction f
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87 For files with multiple spectra
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89 which assumes that at least two
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91 number of fakeit spectra produce
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93 confusion can arise when the row
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95 If integers are given for the ch
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97 =:: [[:]] ..., and is the name
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99 Either format is readable when u
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101 For high-chatter settings, addi
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103 XSPEC12>chain temperature .8 //
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105 5.5.5 freeze: set parameters as
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107 margin (for 1-D and 2-D distrib
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109 where =:: [sourceNum:] | -- T
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111 where n is the component number
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113 is range of positions in the m
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115 Detector channel energies 5.0 -
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117 Similarly, an array extension c
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119 the energy values are two separ
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121 XSPEC commands for editing/view
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123 // Spectrum 3 response will ret
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125 Syntax: lmod [directory] As fo
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127 5.6.14 mdefine: Define a simple
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129 ***Warning: bb is a pre-defined
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131 makes the model named active (
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133 Applying multiple models: Assum
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135 (XSPEC will reject attempts to
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137 5.7 Plot Commands 5.7.1 cpd: se
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139 This command works like the plo
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141 eemodel Plot the current incide
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143 area, noarea After setplot area
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145 /KRM3 /TK4100 /VT125DEC /XDISP
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147 poiss-3 is the arithmetic mean
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149 Mg 3.80e-05 3.80e-05 3.95e-05 3
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151 XSPEC12.0 includes version94.1
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XSPEC Models 153 5.8.6 xset: set va
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XSPEC Models 155 WMAP. SUZPSF-MIXFA
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XSPEC Models 157 5.9 Tcl Scripts Th
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XSPEC Models 159 5.9.5 writefits: w
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XSPEC Models 161 6. XSPEC V12 Model
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XSPEC Models 163 Model Description
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XSPEC Models 165 Model Description
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XSPEC Models 167 Thermal broadening
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XSPEC Models 169 The bapec model us
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XSPEC Models 171 The zbbody variant
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XSPEC Models 173 par4 E c , the e-f
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XSPEC Models 175 par2 par3 Energy s
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XSPEC Models 177 hydrogen density (
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XSPEC Models 179 par2 par3 par4 par
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XSPEC Models 181 The region of para
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XSPEC Models 183 6.2.19 compTT: Com
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XSPEC Models 185 6.2.23 Diskir: Irr
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XSPEC Models 187 6.2.27 diskpbb: ac
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XSPEC Models 189 Borkowski, Lyerly
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XSPEC Models 191 The vgnei variant
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XSPEC Models 193 par2 second powe
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XSPEC Models 195 6.2.38 kerrdisk: a
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XSPEC Models 197 elements. Abundanc
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XSPEC Models 199 par1 plasma temper
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XSPEC Models 201 6.2.45 nei, vnei:
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XSPEC Models 203 par4 Lower limit o
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XSPEC Models 205 6.2.48 nsagrav: NS
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XSPEC Models 207 par1 par2 par3 A =
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XSPEC Models 209 6.2.53 pegpwrlw: p
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XSPEC Models 211 6.2.56 plcabs: pow
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XSPEC Models 213 6.2.59 pshock, vps
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XSPEC Models 215 par1 par2-par13 pa
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XSPEC Models 217 1.1 but uses APED
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XSPEC Models 221 6.2.66 sresc: sync
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XSPEC Models 223 par6 par7 Number o
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XSPEC Models 225 XSPEC12>model etab
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XSPEC Models 227 source frame. Futu
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XSPEC Models 229 par1= n H equivale
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XSPEC Models 231 par1= E c par2= f
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XSPEC Models 233 6.3.26 tbabs, ztba
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XSPEC Models 235 The zvarabs varian
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XSPEC Models 237 varies between 1 a
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XSPEC Models 239 energy ranges of t
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XSPEC Models 241 par2= max Maximum
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XSPEC Models 243 where: par1= par2
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XSPEC Models 247 If multiple observ
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XSPEC Models 249 6.6.5 xmmpsf: xmm
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A-251 Appendix A Appendices The Use
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A-253 120 XSPEC12> This would produ
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A-255 After being executed, many tc
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A-257 in order to start a C-shell.
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A-259 Note that the model string, w
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A-261 Appendix B Fitting with few c
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A-263 1 C y0( x ) i y0( xi) y0(
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A-265 Appendix C Adding models to X
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A-267 first should be set to 1 if m
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A-269 const string& init Initializa
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Appendix D Overview of PLT A-271 As
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A-273 Freeze GAp Grid Hardcopy HElp
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A-275
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A-277 The directory ftools/callib/s
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A-279 csmgh0 Get the cosmology H0 s
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Appendix G Adding a Custom Chain Pr
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A-283 model parameter values. The o
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A-285 (and can be ignored if not re
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A-287 Additionally, we have withdra
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A-289 There are minor plotting
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