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

D.1. BATBINEVT 99
(countscol = “DPH COUNTS”) [string ]
Name of counts column column in input file (column ‘DPH COUNTS’ containing detector
counts histogram when reading DPH data).
(xcol = “DETX”) [string ]
Name of X column in input file (event data).
(ycol = “DETY”) [string ]
Name of Y column in input file (event data).
(maskwtcol = “MASK WEIGHT”) [string ]
Name of MASK WEIGHT column in input file (event data).
(ebinquant = 0.1) [real ]
Default energy bin quantization, in keV, if none is specified in the input event file. Most
BAT input events are quantized with 0.1 keV step sizes using the TSCALn keyword. If no
such keywords are found, then ebinquant is used. This value should represent the minimum
possible energy bin size of the instrument.
(delzeroes = “NO”) [boolean ]
Delete time bins with zero flux? If yes, then any bin which has no counts, or all counts with
zero weights, will be removed from the output. For multi-channel output data types, the time
bin will only be deleted if all spatial/spectral bins contain zero. If delzeroes=“NO”, then the
output may contain bins with zero flux. The error bars will be zero too for those cases, which
may cause subsequent processing to fail.
(minfracexp = 0.1) [real ]
The minimum fractional exposure. Time bins with smaller fractional exposure are deleted
before creating the output. To preserve all time bins, even bins with zero exposure, set
minfracexp=0. Bins with no exposure will have null COUNTS / RATE.
(min dph frac overlap = 0.999) [real ]
The minimum fractional exposure per individual DPH in the input file. The combined set of
all good time intervals must fractionally overlap with a DPH by at least mindphfracoverlap,
or else the DPH row is rejected. The default value of 0.999 allows for a small non-overlap as
well as numerical round-off issues.
(min dph time overlap = 0) [real ]
The minimum time overlap, in seconds, per individual DPH in the input file. The combined
set of all good time intervals must overlap with the DPH by at least mindphtimeoverlap
duration, or else the DPH row is rejected. This is also equivalent to a filter on the minimum
exposure time per individual DPH. The default value of 0 indicates that any number of
seconds is allowed – but the fractional overlap test (mindphfracoverlap) must also pass.
(max dph time nonoverlap = 0.5) [real ]
The maximum non-overlap time, in seconds, allowed per individual DPH in the input file.
After intersecting the combined set of all good times and the individual DPH time interval,
the remaining non-overlapping time must be no more than maxdphtimenonoverlap seconds,
or else the DPH row is rejected. A larger number is a more liberal acceptance criterium. The
default value of 0.5 seconds, allows for a small amount of non-overlap between the good time
intervals and the survey DPH.