batgrbproduct Analysis for Trigger=570402

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Sep 12 17:41:31 EDT 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger570402/GCN5_download_cron
======================================================================

  Trigger: 00570402      Segment: 000

  BAT Trigger Time: 400608000   [s; MET]
      Trigger Stop: 400608064   [s; MET]
               UTC: 2013-09-11T15:59:48.980000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 268.6018644145   Dec: -26.3501770526858  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    13.78
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    13.78

  Flight Position:   [ source = BAT ]
    RA: 268.6018644145   Dec: -26.3501770526858  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 268.610394301243   Dec: -26.3347961928046  [deg; J2000]  
        { 17h 54m 26.5s , -26d 20' 05.3" }
         +/- 1.60890965270732 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.496514815229577 [arcmin] (formal 1-sigma fit error)
    SNR: 15.4196016869606
 
  Angular difference between Flight and Ground position is 1.030540 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 549.491999924183 +/- 33.8532467936228
        Measured from: -61.0239998698235
                   to: 488.468000054359     [s; relative to TRIGTIME]
     T50: 279.587999939919 +/- 37.0105690703654
        Measured from: 32.0000001192093
                   to: 311.588000059128     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -68.3799999952316     
                   to: -67.3799999952316     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -78.6320000290871     
                   to: 528.124000012875     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     6.114389   2.330106   0.115156   0.141224
           0.146097   0.133811   0.112655   0.099878 [error]
 Peak      0.027433   0.015357   0.011930   0.005096
           0.008595   0.007902   0.006555   0.005918 [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 1.93e-06 9.18e-07 2.66e-07 9.69e-08 3.17e-06 3.21e-06   erg/cm2
              Error 1.42e-07 7.54e-08 4.97e-08 3.20e-08 1.92e-07 1.98e-07   erg/cm2
Peak flux Power-law 1.93e-01 1.49e-01 7.74e-02 5.79e-02 4.46e-01 4.77e-01   ph/cm2/s
              Error 1.59e-01 6.07e-02 6.75e-02 1.00e-01 1.79e-01 1.96e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.83e-06 8.79e-07 1.85e-08 1.47e-12 2.72e-06 2.72e-06   erg/cm2
              Error 1.61e-07 9.59e-08 1.86e-08 2.26e-11 1.94e-07 1.94e-07   erg/cm2
Peak flux Cutoff-PL 1.94e-01 1.49e-01 7.69e-02 4.51e-08 4.46e-01 4.76e-01   ph/cm2/s
              Error 1.19e-01 6.16e-02 4.10e-06 1.79e-01 1.93e-01 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    3.788    0.174    -      -           2.75e-04 3.91e-05   96.700 57
CPL   1.000    0.000      50.0    0.0      1.49e-03 0.00e+00  465.220 56
 
The chi2 of BB fit is 54.28 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.947    1.006    -      -           3.05e-03 2.30e-03   72.560 57
CPL   2.796    0.000     251.4    0.0      1.18e-03 0.00e+00   71.870 56
 
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  606.756  -78.632  528.124
T90   549.492  -61.024  488.468
T50   279.588   32.000  311.588
Peak    1.000  -68.380  -67.380

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  268.6104 -26.3348 0.0124    6.2 -100.7       1.6269    15.4  TRIG_00570402       
------------------------------------------
 
Foreground time interval of the image:
-17.799  73.201 (delta_t =  91.000 [sec])
Background time interval of the image:

Lightcurves

Notes:

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:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from  -78.632 sec. to  528.124 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.78783     ( -0.171518   0.176933 )
Norm@50keV  : 2.75250E-04    ( -3.78909e-05   4.0221e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          96.70 using 59 PHA bins.
# Reduced chi-squared =          1.697 for     57 degrees of freedom 
# Null hypothesis probability =   8.067640e-04
 
Photon flux (15-150 keV)    in 606.8 sec: 0.141391 ( -0.00885182  0.00888119 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.16759e-06 ( -1.91785e-07  1.92208e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -78.632 sec. to  528.124 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.49457E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         465.22 using 59 PHA bins.
# Reduced chi-squared =         8.3075 for     56 degrees of freedom 
# Null hypothesis probability =   7.831508e-66
 
Photon flux (15-150 keV)    in 606.8 sec: 0.128599 ( -0.009855  0.009792 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.72299e-06 ( -1.93205e-07  1.94012e-07 ) ergs/cm2
 
Band function
Time interval is from  -78.632 sec. to  528.124 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.34407   (     )
beta        : -8.91643    (     )
Epeak [keV] : 47.7158      (   )
Norm@50keV   : 1.08452E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         439.12 using 59 PHA bins.
# Reduced chi-squared =         7.9840 for     55 degrees of freedom 
# Null hypothesis probability =   2.712769e-61
 
Photon flux (15-150 keV)    in 606.8 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 4.44470  (-0.226979  0.242683)
R^2/D10^2   : 2.03426  (-0.524289   0.70801)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.28 using 59 PHA bins.
# Reduced chi-squared =         0.9523 for     57 degrees of freedom 
# Null hypothesis probability =   5.776413e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.829e-06   1.690e-07
25- 50  8.833e-07   9.466e-08
50-150  1.964e-08   6.578e-09
15-150  2.732e-06   1.893e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 10.8956       (-0.971901      1.11166)
Norm        : 4.06604       (-0.765847     0.954377)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.70 using 59 PHA bins.
# Reduced chi-squared =          1.135 for     57 degrees of freedom 
# Null hypothesis probability =   2.256520e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.917e-06   1.614e-07
25- 50  9.223e-07   9.284e-08
50-150  7.929e-08   2.576e-08
15-150  2.918e-06   1.930e-07
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.41149        (-0.249896      0.219584)
R1^2/D10^2  : 2.11021        (-0.444039      0.784448)
kT2 [keV]   : 200.000        (      )
R2^2/D10^2  : 1.84699E-06    (-1.6759e-06   1.43808e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.09 using 59 PHA bins.
#Fit statistic : Chi-Squared =          51.06 using 59 PHA bins.
# Reduced chi-squared =         0.9289 for     55 degrees of freedom 
# Reduced chi-squared =         0.9283 for     55 degrees of freedom 
# Null hypothesis probability =   6.247698e-01
# Null hypothesis probability =   6.260217e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.825e-06   1.705e-07
25- 50  8.872e-07   8.799e-08
50-150  3.029e-07   3.285e-08
15-150  3.015e-06   2.279e-07

Peak spectrum fit

Power-law model
Time interval is from  -68.380 sec. to  -67.380 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.94739     ( -0.899158   1.11353 )
Norm@50keV  : 3.04528E-03    ( -0.00304486   0.00154959 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.56 using 59 PHA bins.
# Reduced chi-squared =          1.273 for     57 degrees of freedom 
# Null hypothesis probability =   8.021624e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.446094 ( -0.179299  0.179326 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.80181e-08 ( -1.38589e-08  1.52678e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -68.380 sec. to  -67.380 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.79582     (     )
Epeak [keV] : 251.407      (   )
Norm@50keV  : 1.17616E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.87 using 59 PHA bins.
# Reduced chi-squared =          1.283 for     56 degrees of freedom 
# Null hypothesis probability =   7.503440e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.445963 ( -0.179002  0.179194 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.36808e-09 ( -6.4638e-10  6.7443e-10 ) ergs/cm2
 
Band function
Time interval is from  -68.380 sec. to  -67.380 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.52187   ( 1.52307   1.52307 )
beta        : -1.94728    ( 1.9476   0.898011 )
Epeak [keV] : 13.4508      ( -13.1832 -13.1832 )
Norm@50keV   : 8.56122E-03    ( -0.00859756   10161.5 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.56 using 59 PHA bins.
# Reduced chi-squared =          1.319 for     55 degrees of freedom 
# Null hypothesis probability =   5.644383e-02
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.78999  (-4.83257  11.4278)
R^2/D10^2   : 0.313752  (-0.302263   8.06758)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.96 using 59 PHA bins.
# Reduced chi-squared =          1.333 for     57 degrees of freedom 
# Null hypothesis probability =   4.738163e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.660e-09   3.127e-09
25- 50  9.542e-09   6.435e-09
50-150  3.385e-09   2.560e-09
15-150  1.759e-08   1.196e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 83.0068       (-83.866      -83.866)
Norm        : 2.01832       (-0.969162     3.73329)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.28 using 59 PHA bins.
# Reduced chi-squared =          1.286 for     57 degrees of freedom 
# Null hypothesis probability =   7.206259e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.249e-09   3.493e-09
25- 50  8.716e-09   5.980e-09
50-150  1.261e-08   1.087e-08
15-150  2.657e-08   1.920e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.04480        (-4.49575      5.19161)
R1^2/D10^2  : 1.27207        (      )
kT2 [keV]   : 199.023        (-199.053      -199.053)
R2^2/D10^2  : 7.73342E-05    (-5.76614e-05   0.226184)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.88 using 59 PHA bins.
#Fit statistic : Chi-Squared =          71.86 using 59 PHA bins.
# Reduced chi-squared =          1.307 for     55 degrees of freedom 
# Reduced chi-squared =          1.307 for     55 degrees of freedom 
# Null hypothesis probability =   6.287084e-02
# Null hypothesis probability =   6.299827e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.545e-09   4.434e-09
25- 50  6.836e-09   4.279e-09
50-150  2.103e-08   2.389e-09
15-150  3.442e-08   1.185e-08
Plot creation:
Thu Sep 12 18:17:49 EDT 2013