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: http://xmm.vilspa.esa.es/sas/7.0.0/documentation/threads/xspec_thread.html
Дата изменения: Mon Aug 21 18:11:40 2006 Дата индексирования: Sat Dec 22 14:43:51 2007 Кодировка: Поисковые слова: total solar eclipse |
mo = wa((po)). Model: wabs[1]( powerlaw[2] ) Input parameter value, delta, min, bot, top, and max values for ... Current: 1 0.001 0 0 1E+05 1E+06 wabs:nH> Current: 1 0.01 -3 -2 9 10 powerlaw:PhoIndex> Current: 1 0.01 0 0 1E+24 1E+24 powerlaw:norm> --------------------------------------------------------------------------- --------------------------------------------------------------------------- Model: wabs[1]( powerlaw[2] ) Model Fit Model Component Parameter Unit Value par par comp 1 1 1 wabs nH 10^22 1.000 +/- 0. 2 2 2 powerlaw PhoIndex 1.000 +/- 0. 3 3 2 powerlaw norm 1.000 +/- 0. --------------------------------------------------------------------------- --------------------------------------------------------------------------- Chi-Squared = 2.7158111E+09 using 1675 PHA bins. Reduced chi-squared = 1624289. for 1672 degrees of freedom Null hypothesis probability = 0.
The former number indicates the maximum number of iterations before the minimization routine stops. The latter number indicate the minimum difference in chi-squared between two minimization runs, before the routine stops
The former number indicates the maximum number of sigma to be accumulated in a rebinned channel. The latter, the maximum number of channels to bu summed.
The first number indicates the delta chi-squared value.
data 2:2 /xvsas05/sasval/data/procred/Mkn421/P0099280201R2S002SRSPEC1001.FIT
A few differences need to be noticed at the data loading level
The former number indicates the maximum number of iterations before the minimization routine stops. The latter number indicate the minimum difference in chi-squared between two minimization runs, before the routine stops
The former number indicates the maximum number of sigma to be accumulated in a rebinned channel. The latter, the maximum number of channels to bu summed.
Notice that the help system in XSPEC is started with help, and works similarly to the old good VMS help system.