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Matching CIAO and CALDB VersionsCIAO 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 AfterglowsCIAO 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. 15 Sep 2008 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 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. 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. |
Data Products GuideThe Data Products Guide describes the contents and purpose of each Chandra data product. Detailed information is available for each of the following filetypes: These pages may also be accessed from the tables of data products. This document is a work in progress. For the most up-to-date description of the common Chandra data products, refer to the Introduction to the Data Products thread. Primary ProductsIn March 2002, the data products were rearranged such that all products necessary for most analyses are in the primary directory.
Secondary ProductsIf you are interested in reprocessing your data, you will also need the level 1 files, which are in the secondary directory.
Supporting ProductsThe pipeline-produced supporting products are generally not needed in data analysis. These files are created by intermediate processing steps.
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The Chandra X-Ray
Center (CXC) is operated for NASA by the Smithsonian Astrophysical Observatory. 60 Garden Street, Cambridge, MA 02138 USA. Email: cxcweb@head.cfa.harvard.edu Smithsonian Institution, Copyright © 1998-2004. All rights reserved. |
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