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CIAO 3.4 Homepage
CIAO 4.0 Homepage
Introduction: Welcome; Tools & Applications
Data Analysis: Analysis Guides; Science Threads; ChIPS Threads; Sherpa Threads; ChaRT Threads; Why Topics; Help Pages (AHELP)
Documentation: "Watch Out" List; Bug List; Frequently Asked Questions (FAQ); Manuals & Memos; Dictionary; Chandra Publications
Download CIAO: Download CIAO 4.0; System Requirements; Installation Instructions; Platform Support; Release Notes; Version History; Analysis Scripts; Other Analysis Software; CIAO Website
Sherpa (Modeling and Fitting): Sherpa website; Threads; Help Files
ChIPS (Plotting Package): ChIPS website; Threads; Help Files
S-Lang in CIAO: Introduction; Scripts and Packages; Modules
Data Products: Data Basics; Data Products Guide; Data Caveats; Standard Data Processing; Reprocessing III; Chandra Data Archive
Workshops and Conferences: Oct 2008 Workshop; Program Information; Previous Workshops; AAS HEAD 2008
CXC Links: CALDB; ChaRT; ObsVis; ATOMDB; WebGUIDE; Astrostatistics Collaboration; CXO Cross-calibration Page
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Analysis Notes

Matching CIAO and CALDB Versions

CIAO 4.0 requires CALDB 3.4.0 or higher to operate properly.

Are your versions mismatched? Time to update CIAO and CALDB!

Source Detection and Cosmic-Ray Afterglows

CIAO users who are trying to detect sources of about 10 counts or less should be aware of potential confusion with cosmic-ray afterglows that have not been removed from the data.

The Cosmic-Ray Afterglows why topic explains the limitations of the current tools and describes analysis tips to help eliminate more of the afterglows.

News

Previous Items

15 Sep 2008 [New]

The Chandra Contributed Software page has been updated to include a variety of analysis packages and tools which are widely used in the community.

Other Software for Chandra Data Analysis (Note that this is a new URL as well.)

Contributions to the page should be submitted through the Helpdesk.

8 Sep 2008 [New]

CALDB 3.5.0 has been released for use with CIAO 3.4 and CIAO 4.0.

Information on the patch is available from the CALDB 3.5.0 Release Notes and How CALDB 3.5.0 Affects Your Analysis.

Download CALDB 3.5.0

23 Jun 2008

CALDB 3.4.5 has been released for use with CIAO 3.4 and CIAO 4.0.

Information on the patch is available from the CALDB 3.4.5 Release Notes and How CALDB 3.4.5 Affects Your Analysis.

Download CALDB 3.4.5