Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun Jan 19 19:04:48 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger339852
======================================================================

  Trigger: 00339852      Segment: 000

  BAT Trigger Time: 253564843.584   [s; MET]
      Trigger Stop: 253564843.712   [s; MET]
               UTC: 2009-01-13T18:40:39.170560    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 32.0733788955683   Dec: 33.4564341321039  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.58
     Image Trigger?:     NO
     Rate S/N Ratio:     8.83176086632785  [ if not an image trigger ]
     Image S/N Ratio:    7.58

  Analysis Position:   [ source = BAT ]
    RA: 32.0733788955683   Dec: 33.4564341321039  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 32.0679870213464   Dec: 33.4372091809347  [deg; J2000]  
        { 02h 08m 16.3s , +33d 26' 14.0" }
         +/- 0.967989618383756 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.261319581840484 [arcmin] (formal 1-sigma fit error)
    SNR: 31.8642055457509
 
  Angular difference between the analysis and refined position is 1.184661 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 9.0959999859333 +/- 0.901669553693802
        Measured from: -0.0919999778270721
                   to: 9.00400000810623     [s; relative to TRIGTIME]
     T50: 5.86800000071526 +/- 0.630250747851208
        Measured from: 1.6240000128746
                   to: 7.49200001358986     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.45600000023842     
                   to: 2.45600000023842     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.919999986886978     
                   to: 9.95200002193451     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.342903   0.465117   0.336840   0.112902
           0.020064   0.021205   0.019212   0.016371 [error]
 Peak      0.062566   0.106990   0.105127   0.036879
           0.006457   0.007431   0.007232   0.005811 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   10.872   -0.920    9.952
T90     9.096   -0.092    9.004
T50     5.868    1.624    7.492
Peak    1.000    1.456    2.456
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.532    -0.098      0.097       -           -               -         7.55e-03     -4.04e-04          4.03e-04      39.560   57
CPL     -1.463    -0.243      0.336      394.628    -394.628      -394.628      8.17e-03     -1.00e-03          3.63e-03      39.620   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.091     -0.122     0.123       -           -               -         2.14e-02     -1.50e-03          1.50e-03      55.220   57
CPL     -0.882     -0.269     0.524      299.752    -299.752      -299.752      2.66e-02     -6.50e-03          1.90e-02      54.660   56
 
 
=== 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         PL   1.08e-07  1.95e-07  2.69e-07  7.75e-07  7.75e-07  1.35e-06   erg/cm2
      90%_error_low -1.01e-08 -1.09e-08 -1.90e-08 -1.14e-07 -4.51e-08 -1.29e-07   erg/cm2
      90%_error_hi   1.04e-08  1.08e-08  1.89e-08  1.27e-07  4.54e-08  1.39e-07   erg/cm2
Peak flux       PL   5.94e-01  7.64e-01  7.17e-01  1.19e+00  2.47e+00  3.26e+00   ph/cm2/s
      90%_error_low -8.17e-02 -6.55e-02 -5.68e-02 -1.91e-01 -1.78e-01 -2.47e-01   ph/cm2/s
      90%_error_hi   8.56e-02  6.48e-02  5.64e-02  2.13e-01  1.79e-01  2.52e-01   ph/cm2/s
 
Fluence        CPL   1.08e-07  1.96e-07  2.70e-07  7.68e-07  7.73e-07  1.33e-06   erg/cm2
      90%_error_low -1.23e-08 -1.17e-08 -1.76e-08 -3.57e-07 -4.99e-08 -3.41e-07   erg/cm2
      90%_error_hi   8.60e-09  1.21e-08  2.01e-08  8.46e-08  4.67e-08  8.90e-08   erg/cm2
Peak flux      CPL   5.66e-01  7.75e-01  7.35e-01  9.49e-01  2.46e+00  3.02e+00   ph/cm2/s
      90%_error_low -1.03e-01 -7.03e-02 -6.78e-02 -3.69e-01 -1.84e-01 -4.17e-01   ph/cm2/s
      90%_error_hi   9.40e-02  7.17e-02  7.06e-02  2.98e-01  1.84e-01  3.76e-01   ph/cm2/s
 
======================================================================




Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   32.0680    33.4372   0.0060    30.7111   -10.4008         1.2824686     31.864 TRIG_00339852                 
 
Foreground time interval of the image:
 -0.920   9.317 (delta_t =  10.237 [sec])
Background time interval of the image:
-62.683  -0.920 (delta_t =  61.763 [sec])




Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Bokeh Plot

Other quick-look light curves:




Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model
Time interval is from   -0.920 sec. to    9.952 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.53192     ( -0.0977696   0.0971388 )
Norm@50keV  : 7.54977E-03    ( -0.000403832   0.000402695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.56 using 59 PHA bins.
# Reduced chi-squared =         0.6941 for     57 degrees of freedom 
# Null hypothesis probability =   9.619273e-01
 
Photon flux (15-150 keV)    in 10.87 sec: 0.950856 ( -0.051558  0.051694 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.74729e-07 ( -4.51377e-08  4.53952e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.920 sec. to    9.952 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.52951     ( -0.238867   0.339666 )
Epeak [keV] : 9992.88      ( -9991.05 -9991.05 )
Norm@50keV  : 7.57100E-03    ( -0.000398008   0.00423593 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.56 using 59 PHA bins.
# Reduced chi-squared =         0.7064 for     56 degrees of freedom 
# Null hypothesis probability =   9.528904e-01
 
Photon flux (15-150 keV)    in 10.87 sec: 0.950054 ( -0.051133  0.052596 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.72947e-07 ( -4.98785e-08  4.6686e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model
Time interval is from    1.456 sec. to    2.456 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.09065     ( -0.122017   0.123483 )
Norm@50keV  : 2.13505E-02    ( -0.00150262   0.00150121 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.22 using 59 PHA bins.
# Reduced chi-squared =         0.9688 for     57 degrees of freedom 
# Null hypothesis probability =   5.420462e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.47432 ( -0.17844  0.17865 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.23919e-07 ( -1.73524e-08  1.74436e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.456 sec. to    2.456 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.881783     ( -0.268652   0.524362 )
Epeak [keV] : 299.752      ( -299.758 -299.758 )
Norm@50keV  : 2.66463E-02    ( -0.00649666   0.0190121 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.66 using 59 PHA bins.
# Reduced chi-squared =         0.9762 for     56 degrees of freedom 
# Null hypothesis probability =   5.255264e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.45515 ( -0.18401  0.18365 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.21595e-07 ( -1.84435e-08  1.82552e-08 ) ergs/cm2
 

Time-resolved spectra




Distribution

T90 vs. Hardness ratio plot

T90                                   = 9.096 sec.
Hardness ratio (energy fluence ratio) = 1.38331101132

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = 3.025528e-07
S(50-150 keV) = 4.721797e-07

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.




Mask shadow pattern

IMX = 5.842578615715518E-01, IMY = 1.072400552650537E-01

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-62.683400 -0.920000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6563  22.0425    1.6  39.4   75.5   2.4565   7.1    2.1	Crab                          
 63.2262 -43.6368    2.3  51.7  178.1   1.1593   5.0 ------	UNKNOWN                       

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
-0.920000 9.316600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7644  21.8968    9.0  39.5   75.7   0.2017   1.3   10.2	Crab                          
 32.0680  33.4372    0.4  30.7  -10.4   1.2824  31.9 ------	UNKNOWN                       
 52.4234 -47.8218    2.0  53.9 -171.4   0.5934   5.7 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
60.116600 550.416600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 11.0868  79.0471    3.1  46.4    9.7   2.3473   3.8 ------	UNKNOWN                       
  1.2801   1.3120    2.4  43.2 -116.5   6.8249   4.8  110.0	UNKNOWN                       
359.0764   3.2821    3.5  43.1 -112.2   5.4949   3.3  204.6	UNKNOWN