eSASS Users News 2020/6
New eSASS users release: eSASSusers_201009.
New eSASS release: eSASSusers_201009
Middle of October 2020. The fifth eSASS users' release, after launch, has been released eSASSusers_201009.
For the moment this release is functional for Ubuntu 16.04 and 18.04 with the default gcc compilers of these distribution (see further info below).
Click here for detail instructions on how to install it on personal computers.
New features:
- GTI filtering of DEADCOR, OFFSET and all HK extensions has been implemented (previously only CORRATT was filtered).
- The sense of rotation of regions has been brought into line with DS9.
Previously, if --events was set to no, the events extension was omitted from the output, but all other extensions were written. Now, events=no causes DEADCOR, CORRATT, BADPIX and all HK extensions also to be omitted (retained are *GTI extensions as well any the REGION and RAWXY_SEL extensions.)
Added auto as a permitted argument for the command-line parameters size and center_position. The effect of these is to cause the task to respectively size and locate the image so as to include all valid events. Note that a maximum image pixel dimension of 18000 (equivalent to a 20 degree stretch of 4 arcsec pixels) has been hard-wired into the codeb (later this number may be moved to an environment variable.)
Added a flag_invert boolean parameter, which inverts the selection on flag bits. With this at default no, the usual action occurs, i.e. any event with any of the specified flag bits set is discarded. With flag_invert=yes, such events are instead the only ones retained.
- Flag selection is now also stored, for convenience of the user, as a string in the comment of the FLAGSEL keyword.
- The suffix parameter can now contain a filename extension allowing writing compressed files (i.e. suffix with extension .fits.gz)
- Large reduction in stack usage, which now means that the ulimit -s command is no longer necessary to use srctool.
- Band-dependent column units are now copied by CATPREP from the input source list.
Added a new parameter detuid_prefix (defaults to empty string) which is prepended to detuid names in the output to catprep. Its maximum length is currently 25 characters - anything else is truncated.
And many more bug fixes and added features. Check out the individual tasks pages for further information (click here). Specific information on the changes in individual tasks can be found on the ChangeLog file of each task (/<my eSASS path>/sw/eSASSusers_201009/erosita/task/TASKNAME).
Warnings:
- This eSASS users release version will not work on Ubuntu systems lower than 16.04.
This release is still not available for macOS and Ubuntu 20.04 with gcc compiler v>8. A Docker container is being prepared for users with these operatives system.
The eSASS team