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Last modified: 14 April 2008

URL: http://cxc.harvard.edu/ciao4.0/releasenotes/ciao_4.0.2_release.html
Hardcopy (PDF): A4 | Letter

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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

23 Jun 2008 [New]

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

4 Jun 2008 [New]

The CXC announces the return of the Chandra/CIAO workshops. This is the sixth in a series of workshops started in 2001 aimed at helping users to work with the Chandra Interactive Analysis of Observations (CIAO) software.

The 6th Chandra/CIAO Workshop will be held 20-22 October 2008 at the Chandra X-ray Center in Cambridge, MA (USA). Registration is now open!

30 May 2008

Several of the CIAO contributed scripts were updated to replace the Unix "head" and "tail" commands with the CIAO tools "dmkeypar" and "pget". A user reported script failure on Mac OS X 10.4 Intel due to incompatible syntax.

Download the Scripts package

16 Apr 2008

CIAO has been patched to CIAO 4.0.2.

The CIAO 4.0.2 patch enables CIAO to run on Mac OS X 10.5 (Leopard) Intel. The patch is optional for 10.4 (Tiger) Intel machines.

The patch should not be applied to Linux, Solaris, or Mac PowerPC installations of CIAO.

Download the 4.0.2 patch.

Additionally, there is an updated standalone version of ObsVis for Mac OS X Intel; see the ObsVis website for details and the download.

CIAO 4.0.2 Release Notes

Return to: Version History

[New] (16 Apr 2008) CIAO 4.0 has been patched to CIAO 4.0.2 on Mac OS X Intel only. The patch should not be applied to Linux, Solaris, or Mac PowerPC installations of CIAO.

In addition to the patch, there is an updated standalone version of ObsVis for Mac OS X Intel; see the ObsVis website for details and the download.

CIAO 4.0 Release Notes

Mac OS X platforms: FITS table file writing slowness with NFS-mounted disks.

FITS table file writing through the CXC Data Model slows by a significant factor on Mac OS X machines - both 10.4 (Tiger) and 10.5 (Leopard) - when the data is accessed via a networked file system (NFS) mount. This issue does not affect Solaris or Linux platforms.

CIAO 4.0.2: Mac OS X 10.5 Intel

The CIAO 4.0.2 patch enables CIAO to run on Mac OS X 10.5 (Leopard) Intel. The patch file may be applied to CIAO 4.0 or 4.0.1.

The patch is optional for Mac OS X 10.4 (Tiger) Intel machines. Users who choose to install it will get updated versions of ds9 and XPA, as well as a fix to the Data Model.

We currently do not support CIAO on Mac OS X 10.5 (Leopard) PowerPC. Please contact the Helpdesk if you are interested in having this version of CIAO available.

User Interface

  • The 10.5 Intel release includes the Leopard ports of ds9 v5.1 and XPA v2.1.9, along with several updates to the UI applications ChIPS and Prism.

Data Model

  • NaN values were not being recognized as such; they were instead handled as very small numbers (1.06x10^-314). This example is a case where the bug may have been seen: 

    unxi% dmcopy infile=file.fits"[bin (#1,#2)=2][(#1,#2)=circle(25,25,25)][opt null=nan]" \
      outfile=filtered.fits

    This bug only affected users on Mac OS X Intel.

Hardcopy (PDF): A4 | Letter
Last modified: 14 April 2008

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