Chandra X-Ray Observatory (CXC)
Skip to the navigation links
Search the CIAO website or contact the CXC HelpDesk
Last modified: 9 November 2011

URL: http://cxc.harvard.edu/ciao4.4/bugs/vtpdetect.html

Bugs: vtpdetect

Return to: Bug List Index

For detailed information and examples of running this tool, refer to the vtpdetect ahelp file.

Bugs

vtpdetect with negative coordinates  (16 May 2007)

Running vtpdetect on a level 1 event file may fail with an error that all the events are at the same location and the tool cannot tessellate. This is related to the (normal) bad coordinates at the beginning of the ObsID where there is no aspect data.

Workaround:

If you must work with the evt1.fits file, apply a time filter before running vtpdetect.


Last modified: 9 November 2011
CXC logo

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 © 1998-2012. All rights reserved.