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Last modified: 13 December 2007

URL: http://cxc.harvard.edu/ciao4.0/bugs/dmextract.html

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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.

Bugs: dmextract

Return to: Bug List Index

A list of bugs fixed in CIAO 4.0 is available.

Bugs

  1. dmextract does not ignore pixels in an image with a value equal to the BLANK keyword.

Bugs

  1. dmextract does not ignore pixels in an image with a value equal to the BLANK keyword.

Bugs fixed in CIAO 4.0

The following is a list of bugs that were fixed in the CIAO 4.0 software release.

  1. A parse error occurs when combining the grid syntax with use of the bkg parameter (01 Dec 2006)

    For example: 

    unix% dmextract \
      infile="acis_evts.fits[pos=circle(25920,25920,300)][bin time=grid(src_bin100.lc[cols time_min,time_max])]" \
      outfile=lightcurve.fits opt=ltc1 \
      bkg="acis_evts.fits[pos=circle(21184,30496,1200)]" 
# dmextract (CIAO 3.4): dsDMEXTRACTREGPARSEERR -- ERROR: Failed to parse the supplied regions. Please check the format.

# dmextract (CIAO 3.4): dsDMEXTRACTPROFILEERR -- ERROR: Failed to process some files.

    Even though the grid syntax is used in the input file filter, it is the parsing of the background file definition that causes a failure. Leave the bkg parameter blank and the command runs correctly.

Last modified: 13 December 2007

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