The SWIFT BAT Software Guide Version 6.3 30 ... - HEASARC - Nasa
The SWIFT BAT Software Guide Version 6.3 30 ... - HEASARC - Nasa
The SWIFT BAT Software Guide Version 6.3 30 ... - HEASARC - Nasa
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
ii CONTENTS<br />
4.4 How Sky Fluxes are Reconstructed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23<br />
4.5 <strong>BAT</strong> Field of View and Partial Coding . . . . . . . . . . . . . . . . . . . . . . . . . . 23<br />
4.6 <strong>BAT</strong> Coordinates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24<br />
4.7 Definition of <strong>BAT</strong> Count Units and Corrections . . . . . . . . . . . . . . . . . . . . . 25<br />
4.7.1 Definition of <strong>BAT</strong> Mask-Weighted Counts . . . . . . . . . . . . . . . . . . . . 25<br />
4.7.2 Converting to a counts per area . . . . . . . . . . . . . . . . . . . . . . . . . . 26<br />
5 <strong>BAT</strong> Analysis Procedures 27<br />
5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27<br />
5.2 Complete GRB Processing Script . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28<br />
5.2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28<br />
5.2.2 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28<br />
5.2.3 Change to Data Directory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28<br />
5.2.4 Creating GRB Products Automatically . . . . . . . . . . . . . . . . . . . . . 28<br />
5.2.5 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29<br />
5.2.6 When Things Go Wrong . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29<br />
5.2.7 Making Your Own Custom Products . . . . . . . . . . . . . . . . . . . . . . . 29<br />
5.2.8 Spectral Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <strong>30</strong><br />
5.3 Energy Calibration of Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <strong>30</strong><br />
5.3.1 Reasons to Re-run the Energy Calibration . . . . . . . . . . . . . . . . . . . . <strong>30</strong><br />
5.3.2 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <strong>30</strong><br />
5.3.3 Initial Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31<br />
5.3.4 Compute Energy Calibration for <strong>BAT</strong> Events . . . . . . . . . . . . . . . . . . 31<br />
5.3.5 What to do if no gain/offset map is present . . . . . . . . . . . . . . . . . . . 31<br />
5.4 Making a Detector Quality Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32<br />
5.4.1 Reasons to Create a <strong>BAT</strong> Quality Map . . . . . . . . . . . . . . . . . . . . . 32<br />
5.4.2 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33<br />
5.4.3 Initial Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33<br />
5.4.4 Create a Detector Plane Image . . . . . . . . . . . . . . . . . . . . . . . . . . 33<br />
5.4.5 Retrieve Known Problematic Detectors . . . . . . . . . . . . . . . . . . . . . 34<br />
5.4.6 Find Noisy Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34<br />
5.4.7 Where to Use the Quality Map . . . . . . . . . . . . . . . . . . . . . . . . . . 34<br />
5.4.8 <strong>The</strong> Difference Between the Enable/Disable Map and the Quality Map . . . . 34<br />
5.4.9 What to do if no detector enable/disable map is present . . . . . . . . . . . . 35<br />
5.5 Mask Weighting (Ray Tracing) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35<br />
5.5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35<br />
5.5.2 Reasons to Re-run the Mask Weighting . . . . . . . . . . . . . . . . . . . . . 36<br />
5.5.3 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37