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

148 APPENDIX D. BAT SOFTWARE TOOL REFERENCE
trigstop = 0.0 [real ]
Stop time of the foreground interval containing the burst in mission elapsed time. A value of
0 indicates to use the times from the TDRSS position message, and a non-zero value overrides
the TDRSS message.
backstrt = 0.0 [real ]
Start time of the background interval before the burst in mission elapsed time. A value of 0
indicates to use the times from the TDRSS position message, and a non-zero value overrides
the TDRSS message.
backstop = 0.0 [real ]
Stop time of the background interval before the burst in mission elapsed time. A value of 0
indicates to use the times from the TDRSS position message, and a non-zero value overrides
the TDRSS message.
date obs = “INDEF” [string ]
User override of the DATE-OBS keyword in event files. This parameter is useful if the input
data has an invalid date, like ‘2001-01-01’ or ‘TBD’. In that case, set date obs=‘YYYY-MM-
DD’ where YYYY-MM-DD is the date of the observation. A value of “INDEF” indicates
that the DATE-OBS keyword should not be changed (although it will still be checked for
validity).
(tbkgsub = YES) [boolean ]
If set, then the task instructs battblocks to perform background subtraction during the “background”
intervals before and after the GRB before estimating the T50/T90 durations. If not
set, then it is assumed that the light curves are already background subtracted (via mask
weighting). Caveats: setting tbkgsub=YES may cause problems if the light curve doesn’t
have a true quiescent background interval; setting tbkgsub=NO may cause problems if the
light curve is not fully background subtracted.
(pcodethresh = 0.0) [real ]
Minimum partial coding threshold. Set this value to a number greater than 0 in order to
exclude noisy data when a GRB passes out of the BAT field of view. A value of 0.0 includes
all data; A value of 1.0 includes only data when the source is in the (small) BAT fully coded
field of view.
(chatter = 1) [integer, 0 - 5 ]
Currently ignored.
(history = YES) [boolean ]
Currently ignored.
D.10.8 EXAMPLES
1. Run the BAT GRB product script on BAT trigger 154112 (GRB 050908). The BAT GRB data
are archived in a directory called 00154112000 (the “000” refers to segment number 0). batgrbproduct
will perform a standard analysis and place the results in the directory 00154112000-results.
batgrbproduct 00154112000 00154112000-results