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New spectral analysis commands in EXSAS '97:

FIT/SPECTRUM, MODEL/SPECTRUM: An inconsistent definition of the number of model parameters in the spectral models *tblm* and *tbef* has been corrected. The bug resulted in warnings like "Unaligned access......" but did not affect the fitting results. Also: the maximum number of grid steps has been changed from 50 to 100. INTEGRATE/FLUX: Checks now if the integrated flux was computed taking the galactic absorption model GAMM() into account. If the integrated flux is the absorbed flux a note is given on the screen. The source code has been revised and optimized. CONVERT/RATE_TO_FLUX: New command: The program computes the energy flux for a given count rate and spectral model. See the online help for a detailed description of the command syntax. Additional background information on how the command works in detail can be found on the EXSAS Spectral Analysis Homepage http://www.rosat.mpe-garching.mpg.de/~web/exsas/cts2flx/cts2flx.html CALCULATE/GALACTIC_NH: The unit of the output has been changed from 10^20 1/cm^2 to 10^21 1/cm^21 to reach agreement with the units of Nh used in the parameter files of the spectral fitting procedures. In non table mode the *unit* of Nh was given as 10^20 1/cm^2 although Nh actually was computed in units of 10^21 1/cm^2. This is corrected now.



Author: Werner Becker (e-mail: web@mpe-garching.mpg.de ) / Page last modified: 09-SEP-97