About Chandra Archive Proposer Instruments & Calibration Newsletters Data Analysis HelpDesk Calibration Database NASA Archives & Centers Chandra Science Links

Skip the navigation links
     
Last modified: 21 September 2006

URL: http://cxc.harvard.edu/sherpa3.4/bugs/io_subtract.html
Hardcopy (PDF): A4 | Letter

[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.

I/O Bugs: subtract

Return to: Bug List Index

Bugs

  1. If one issues the subtract command, then reads in background errors with berrors, the errors are ignored.

Bugs

  1. If one issues the subtract command, then reads in background errors with berrors, the errors are ignored.

    Also, if source errors are read (errors) after subtract is issued, these errors overwrite the propagated errors and are used instead.

Hardcopy (PDF): A4 | Letter
Last modified: 21 September 2006

Chandra Science | Chandra Home | Astronomy links | iCXC (CXC only) | Search


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.