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

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

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D.10. <strong>BAT</strong>GRBPRODUCT 147<br />

(within 1500 seconds), including the pre-slew, slew and post-slew intervals. <strong>The</strong> “tdrss”<br />

file contains time intervals transcribed from the TDRSS position message. Files with “bb”<br />

are Bayesian blocks produced with the battblocks task on light curves with different time<br />

binnings.<br />

outdir/auxil Auxiliary information. <strong>The</strong> file with “qmap” is a detector quality map. <strong>The</strong> file with<br />

“output.cat” contains a revised position based on a fit to all pre-slew data. <strong>The</strong> “output.reg”<br />

file is a region file suitable for use within DS9 or FV. <strong>The</strong> “evaux” file is an auxiliary raytracing<br />

file.<br />

outdir/events Event files. Intermediate event files are stored here. Since they are re-created each<br />

time the task is run, the files in this directory can be deleted if desired.<br />

D.10.6 ERRORS<br />

Most error conditions are reported on the console. Please note that not all bursts are the same,<br />

and the Swift spacecraft response is not the same. For example, there may not be a slew to the<br />

burst, in which case, there won’t be “slew” and “post-slew” spectra or images. Also, if the burst<br />

does not extend past the end of the slew (if there is one), there will not be a post-slew spectrum.<br />

<strong>The</strong> task will report these failures to produce spectra and images as errors, but they are benign.<br />

For certain kinds of bursts – namely short hard bursts – the task is not always able to find the<br />

time interval of the burst. In those cases, the user must manually determine the time interval of<br />

the burst and use the trigtime and trigstop keywords to the task.<br />

D.10.7 PARAMETERS<br />

indir [string ]<br />

Input directory containing Swift data. This directory must have the standard Swift archive<br />

layout. Files in the input directory will not be modified.<br />

outdir [string ]<br />

Output directory which will contain the processing results. <strong>The</strong> output files are organized<br />

by file type: events, pha (spectra), lc (light curves), gti (good time intervals), auxil (miscellaneous).<br />

Also a summary report is created (report.txt), and a detailed processing log<br />

(process.log).<br />

ra = “<strong>BAT</strong>” [string ]<br />

RA of the source (degrees). A value of “<strong>BAT</strong>” or “XRT” means that the <strong>BAT</strong> or XRT<br />

TDRSS position should be used. A value of “BLIND” means to do the analysis blind, without<br />

concentrating on any one position in the field of view. When “BLIND”, then the trigtime/trigstop/backstrt/backstop<br />

parameters must be specified.<br />

dec = “<strong>BAT</strong>” [string . ]<br />

Declination of the source (degrees). See “ra”.<br />

trigtime = 0.0 [real ]<br />

Start time of the foreground interval containing the burst in mission elapsed time. A value of<br />

0 indicates to use the times from the TDRSS position message, and a non-zero value overrides<br />

the TDRSS message.

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