The SWIFT BAT Software Guide Version 6.3 30 ... - HEASARC - Nasa

102 APPENDIX D. BAT SOFTWARE TOOL REFERENCE
12. Binning by constant signal to noise (threshold = 6 sigma)
batbinevt infile.evt outfile.pha PHA 0 snr myebounds.fits snrthresh=6.0
(The threshold applies to total spectrum, not any one bin.)
13. Selecting the times by hand
batbinevt infile.evt outfile.pha PHA 0 uniform myebounds.fits tstart=$START tstop=$STOP
(Only includes data from $START to $STOP)
14. Applying your own binning, say from Bayesian Blocks analysis (must make a Good Time
Interval (GTI) named mygti.gti)
batbinevt infile.evt outfile.pha PHA 0 gti myebounds.fits gtifile=mygti.gti
(The “gti” time binning means that the bins are taken from the GTI file. When the time
binning is not “gti” the GTI file is still useful to select data by time.)
15. Unweighted spectrum (with no background subtraction)
batbinevt infile.evt outfile.pha PHA 0 uniform myebounds.fits weighted=no
(The weighted parameter decides whether mask weighting is applied or not.)
16. Change output units to counts instead of counts/s.
batbinevt infile.evt outfile.pha PHA 0 uniform myebounds.fits outunits=count
(The outunits parameter can be either COUNT or RATE.)
MAKING LIGHT CURVES and SPECTRA from DPHs
17. Accumulate mask weighted light curve from DPH (must have generated mask weight image
maskwt.img for source position of interest)
batbinevt infile.dph outfile.lc LC 0 infile 14.0-194.9 maskwt=maskwt.img
(Note that energy bins must be exact to within 0.1 keV. The “infile” for the time binning
algorithm indicates that the input file binning should be replicated in the output.)
18. Accumulate total mask weighted spectrum from DPH
batbinevt infile.dph outfile.pha PHA 0 uniform infile.dph maskwt=maskwt.img