BAT Response Work Web Page

Upcoming Telecon Scheduled

MAY-14-2004 (Friday) at 08:00 AM EDT USA = 21:00 or 9 PM in Japan
Telecon Access Information

Proposed Agenda

GEANT4 SwiMM simulations - Goro & Masaya

Are the geometry changes complete & checked?
Discuss simulations we need to do:

Simulate test data - which source & position?
Make up simulated sources to test batdrmgen

monochromatic sources on axis and at edge of FOV
sources with broken power-law spectra etc

Batdrmgen Status

All necessary code is complete - ready to be submitted to SDC

Derek reports on success adding a few minor features - let's try to set a firm 1 pm deadline for any more code changes
Goro reports on fitting to corrected summed spectra
Discuss changes needed in calibration parameter table: no changes after 1 pm (EDT USA) if possible

Work required for Build 8 deadline on 5/14/04

Craig M. has to add some keywords etc to batbinevt - status?
Try to get a more realistic pha file for testing - it would be best to use batbinevt to make the file
Add more comments
Edit html page describing batdrmgen
Testing code

use XSPEC to fit other ground calibration data: far-field, other rad sources etc.
how good are the fits? How good is our overall response?
systematic test using every combination of user input parameters

Decide on the details of the batdrmgen.par file:

parameter ranges and default parameter values
which parameters should be hidden?

Work after Build 8 deadline

add batdrmgen description to Han's BAT software manual
leading edge detectors
reading a table of multiple source positions
tidying up this web page!

Swift news - Thermal Vacuum test begins 5/17/04 and continues 24 hr/day for 3 weeks
Future Plans

Agendas from Past Meetings

Summary of Our Last Telecon

Summaries of Past Meetings

Action Items

Processed Cal Data

coarse grid data: Rebinned to same energy scale: /local/data/gcn5a/array_cal/coarse_grid/full_array/ summed spectra: /local/data/gcn5a/array_cal/coarse_grid/sum_array/ far field data: rebinned to same energy scale: /local/data/gcn5a/array_cal/far_field/full_array/ summed spectra: /local/data/gcn5a/array_cal/far_field/sum_array/

Plot of course grid positions

Plot of far field positions

Older calibration data processing notes

Count Rate Comparisons

Overview

Cd runs

The measured rates are equal to the predicted rates
Block Cal runs: The measured rates are within 1% of the predicted rates

Ba runs

The measured rates are 5-10% lower than the predicted rates
Block Cal runs: The measured rates are 6% higher than the predicted rates
Taken with fsw: The measured rates are 47% lower than the predicted rates

Am runs

The measured rates are 60-70% lower than the predicted rates
Block Cal runs: The measured rates are 13% higher than the predicted rates

Co runs

The measured rates are 40% higher than the predicted rates
Block Cal runs: The measured rates are 33% higher than the predicted rates

Lower Threshold Study

MuTau Database

Added the new results from Block 15, 16 and 17 New!

Current Fit Results

Ba-133 fit --- 11 : Spectral fit of newly re-processed ground calibration data (26 Feb 2005) New!

Variations in the (tanx,tany) plane New!

Past Fit Results

We make changes to the spectral response model and fit the new models to the same 9 mask-weighted summed Co-57 calibration data spectra, and expand the fit energy limits to include the 25 - 150 keV range.

Current Simulation Results

About Swift Mass Model (03Nov2004) New!

Modification of the Sandwich and DM geometry (4Apr2004)

imaging test for the new geometry (14May2004)

sum_spectra comparison plot (real data vs sim data)

REFERENCE & DOWNLOADS

Craig Markwardt's detailed BAT Imaging Performance Memo (has mask offset etc)
Link to Imaging Performance web page

DRAWINGS OF PASSIVE MATERIAL IN BAT FOV (PDF Files)

Passive_materials_drawing.pdf Side views of BAT structure with passive materials color coded
mask_MLI.pdf Drawing of top view of the mask MLI geometry
Purge_bag.pdf Top view of BAT detector array with purge bag installed

PASSIVE MATERIAL INFO TABLES (PDF Files)

Summary_table.pdf List of the passive materials in the FOV.
materials_list.pdf List of material composition data for the materials in the table above.
honeycomb_geom.pdf Notes on representing themask honeycomb structure in the SwiMM