I/O Bugs: ignore - CIAO 3.4

[Sherpa Logo]

Sherpa 3.4 Homepage
Sherpa 4.1 Homepage
Analysis Threads: Sherpa; General; ChaRT
Help Pages (AHELP)
Statistics
Optimization Methods
Documents: Publications
Scripts
FAQ
Bugs
Release Notes
CXC Links: CIAO (Data Analysis); Astrostatistics Collaboration
Site Map

News Previous Items

11 Nov 2008

These are the webpages relative to Sherpa in the CIAO 3.4 release (18 December 2006). They are no longer actively updated, however the CXC will continue limited support of CIAO 3.4 for the near future.

15 Dec 2008

The newest version of the Chandra Interactive Analysis of Observations software, is CIAO 4.1, released on 15 December 2008. Read the release notes for detailed information. This release requires that CALDB 4.1.0 be installed for the software to work correctly.

Bugs

If the instrument background set and you try to filter on energy, you will get a warning.

However, if you then add "source" to the filtering syntax to correct the command, an error is printed and the filter command is ignored:

sherpa> ignore energy :0.3,7:
WARNING: filter command ignored -- cannot be applied to dataset 1
WARNING: filter command ignored -- cannot be applied to dataset 1
sherpa> ignore source 1 energy :0.3,7:
Error: filter stack cannot be reduced; filter reset.

sherpa> ignore source 1 energy :0.3,7:
sherpa>

As shown, issuing the correct filter a second time works properly.