HEASARC is experience a very high load of requests that is affecting our services. We apologize for the incovenience. If you are trying to download a lot of data, please consider using the AWS cloud copy of most HEASARC data. The full suite HEASoft 6.35.1 source code is available for download here and here. As an alternative, SciServer is an online platform that has the software installed and data available when you login.
freeze (and rfreeze)
set parameters as fixed
Do not allow indicated model parameters to vary. (See also thaw)
| Syntax: | freeze | [<param range>...] |
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where <param range> ::= [<modelName>:]<param#>|<param#>- <param#>.
For response parameters (see gain command):
| Syntax: | rfreeze | [<param range>...] |
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where <param range> ::= [<source number>:]<param#>|<param#>- <param#>.
The indicated model parameter or range of model parameters will be marked so they cannot be varied by the fit command. By default,the range will be the last range input by either a freeze or thaw command.
Examples:
Currently there are six parameters, initially all unfrozen.
XSPEC12> freeze 2 //Parameter 2 is frozen XSPEC12> freeze 4-6 //Parameters 4, 5, and 6 are frozen. XSPEC12> thaw 2 3-5 //Parameters 2, 4, and 5 are thawed, parameter 3 is unaffected. XSPEC12> freeze //Parameters 3,4,5 are frozen (the last range input by a freeze //or thaw command). XSPEC12> rfreeze 4-6 //Response parameters 4, 5, and 6 are frozen.