batgrbproduct analysis for trigger=282176

batgrbproduct Analysis for Trigger=282176

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This page will be updated for up to 8 downlinks after the trigger.

Usage coorconv (RA) (Dec)
 
  Angular difference between Flight and Ground position is Usage: arcmin
 
  Partial Coding Fraction:     [ including projection effects ]

  Duration
     T90: 508.591999977827 +/- 78.565209198917
        Measured from: 298.247999995947
                   to: 806.839999973774     [s; relative to TRIGTIME]
     T50: 244.559999972582 +/- 117.577310731124
        Measured from: 508.919999986887
                   to: 753.479999959469     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 586.379999995232     
                   to: 587.379999995232     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 281.752000004053     
                   to: 813.240000009537     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.610703   5.147635   3.091139   0.625689
           0.112733   0.111779   0.096548   0.082457 [error]
 Peak      0.021010   0.022007   0.013286   0.008475
           0.004840   0.004847   0.004173   0.003612 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
=== Fluence/Peak Flux Summary ===
 
              Model    Band1    Band2    Band3    Band4    Band5    Total      
                       15-25    25-50   50-100  100-350   15-150   15-350   keV
Fluence   Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux Power-law 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence   Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err   : 90% error of the photon index
Epeak      : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm       : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom

 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  531.488  281.752  813.240
T90   508.592  298.248  806.840
T50   244.560  508.920  753.480
Peak    1.000  586.380  587.380

Image

Pre-slew 15-350 keV image (Event data; bkg subtracted)

 
Foreground time interval of the image:
Background time interval of the image:
-239.000 106.301 (delta_t = 345.301 [sec])

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

1 s binning

From T0-310 s to T0+310 s

From T100_start - 20 s to T100_end + 30 s

Full time interval

64 ms binning

Full time interval

From T100_start to T100_end

From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Spectra

Notes:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Time interval is from  281.752 sec. to  813.240 sec.
Usage: bat_spec_fit_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Cutoff power-law model

Time interval is from  281.752 sec. to  813.240 sec.
Usage: bat_spec_fit_cutoff.sh (pha file) (response file)            
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Band function

Time interval is from  281.752 sec. to  813.240 sec.
Usage: bat_spec_fit_band_sys.sh (pha file) (response file)      
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Peak spectrum fit using the pre-slew DRM

Power-law model

Time interval is from  586.376 sec. to  587.384 sec.
Usage: bat_spec_fit_sys.sh (pha file) (response file)           
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Cutoff power-law model

Time interval is from  586.376 sec. to  587.384 sec.
Usage: bat_spec_fit_cutoff.sh (pha file) (response file)            
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Band function

Time interval is from  586.376 sec. to  587.384 sec.
Usage: bat_spec_fit_band_sys.sh (pha file) (response file)      
       This script tries to add the systematic column to the PHA
       file before doing the fitting

Plot creation:
Mon Dec 17 16:53:33 EST 2007