Table of Contents
Problem with large files (18 Sep 2012)
chandra_repro uncompresses files into memory to be written back out to disk. With large files, this can exhaust system resources and cause the script to fail with a non-informative error message
Unable to read evt1 file # chandra_repro (09 April 2012): ERROR read error
chandra_repro will use the uncompressed version of the file so the easiest work around it to gunzip the files before running chandra_repro
unix% gunzip primary/*gz secondary/*gz
dsAPEPULSEHEIGHTERR -- WARNING: pulse height is less than split threshold when performing serial CTI adjustment.
The following warning may be displayed when running chandra_repro on an ACIS observation
# acis_process_events (CIAO): The following error occurred 2 times: dsAPEPULSEHEIGHTERR -- WARNING: pulse height is less than split threshold when performing serial CTI adjustment.
As is discussed in the acis_process_events bug page, this warning can safely be ignored as long as the number of times printed is small compared to the total number of events.
chandra_repro fails to create MEG responses
For datasets taken with the HETG inserted, chandra_repro is supposed to create the positive and negative first order (+/-1) response files : ARF and RMF, for both the HEG and MEG arms. Due to a bug in mktgresp this is not happening in Python 3 edition of CIAO 4.10.
The responses are only created for +/-1 HEG. The +/-1 HEG files which are created are correct.
Users can simply run mktgresp after chandra_repro to create the full set of +/- 1,2,3 HEG and MEG responses by setting the orders parameter to an empty|blank string.
unix% chandra_repro 19882 out= ... unix% mktgresp infile=19882/repro/acisf19882_repro_pha2.fits \ evtfile=19882/repro/acisf19882_repro_evt2.fits \ outroot=19882/repro/tg/acisf19882_repro \ orders= \ mode=h clob+
This creates the response files for each spectrum in the pha2.fits file.