batgrbproduct Analysis for Trigger=666352

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Dec  5 19:37:19 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger666352/batgroup_hand_proc
======================================================================

  Trigger: 00666352      Segment: 000

  BAT Trigger Time: 471023176.448   [s; MET]
      Trigger Stop: 471023179.52   [s; MET]
               UTC: 2015-12-05T15:46:00.936900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 229.282355559918   Dec: 35.7691507793621  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.07
     Image Trigger?:     NO
     Rate S/N Ratio:     16.431676725155  [ if not an image trigger ]
     Image S/N Ratio:    7.07

  Flight Position:   [ source = BAT ]
    RA: 229.282355559918   Dec: 35.7691507793621  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 229.290549843634   Dec: 35.7671507493265  [deg; J2000]  
        { 15h 17m 09.7s , +35d 46' 01.7" }
         +/- 1.27558638145339 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.430872389916709 [arcmin] (formal 1-sigma fit error)
    SNR: 21.483462314195
 
  Angular difference between Flight and Ground position is 0.416583 arcmin
 
  Partial Coding Fraction: 0.9375    [ including projection effects ]

  Duration
     T90: 62.8320000767708 +/- 12.2822929448992
        Measured from: -1.72000002861023
                   to: 61.1120000481606     [s; relative to TRIGTIME]
     T50: 24.9920000433922 +/- 3.85131662314987
        Measured from: 6.12000000476837
                   to: 31.1120000481606     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.97999995946884     
                   to: 2.97999995946884     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.97600001096725     
                   to: 69.5119999647141     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.478742   0.685136   0.744917   0.100205
           0.050917   0.051877   0.046245   0.040082 [error]
 Peak      0.022096   0.018162   0.032534   0.009584
           0.006006   0.006097   0.006084   0.005062 [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 1.28e-07 2.87e-07 5.09e-07 2.12e-06 1.39e-06 3.04e-06   erg/cm2
              Error 1.82e-08 2.42e-08 4.39e-08 4.15e-07 1.12e-07 4.41e-07   erg/cm2
Peak flux Power-law 9.16e-02 1.59e-01 2.10e-01 5.67e-01 6.14e-01 1.03e+00   ph/cm2/s
              Error 5.58e-02 5.69e-02 4.43e-02 3.15e-01 1.38e-01 2.93e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.11e-07 2.99e-07 5.38e-07 1.03e-06 1.34e-06 1.97e-06   erg/cm2
              Error 2.32e-08 2.75e-08 5.21e-08 6.92e-07 1.21e-07 6.92e-07   erg/cm2
Peak flux Cutoff-PL 9.51e-02 1.62e-01 2.10e-01 5.47e-01 6.17e-01 1.02e+00   ph/cm2/s
              Error -------- -------- -------- 3.50e-01 1.39e-01 3.36e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.174    0.129    -      -           1.85e-03 1.35e-04   65.090 57
CPL   0.585    0.570     134.2  292.2      3.42e-03 2.14e-03   61.460 56
 
The chi2 of BB fit is Chi-Squared Chi-Squared 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    0.596    0.476    -      -           5.25e-03 1.34e-03   56.960 57
CPL   0.602    0.482    9999.4    0.0      5.32e-03 4.53e-03   56.980 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: 30.336000 sec.
T50 in the 50-300 keV band: 15.104000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   73.488   -3.976   69.512
T90    62.832   -1.720   61.112
T50    24.992    6.120   31.112
Peak    1.000    1.980    2.980

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  229.2905    35.7672   0.0089    14.6839   143.3551         1.7572598     21.483 TRIG_00666352                 
 
Foreground time interval of the image:
 -3.976  40.453 (delta_t =  44.429 [sec])
Background time interval of the image:
-255.747  -3.976 (delta_t = 251.771 [sec])

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   -3.976 sec. to   69.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17373     ( -0.129727   0.128433 )
Norm@50keV  : 1.84829E-03    ( -0.000134547   0.000134526 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.09 using 59 PHA bins.
# Reduced chi-squared =          1.142 for     57 degrees of freedom 
# Null hypothesis probability =   2.159118e-01
 
Photon flux (15-150 keV)    in 73.49 sec: 0.216183 ( -0.016238  0.016268 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38849e-06 ( -1.11892e-07  1.12562e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -3.976 sec. to   69.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.585376     ( -0.609781   0.530516 )
Epeak [keV] : 134.208      ( -41.4797 542.833 )
Norm@50keV  : 3.41994E-03    ( -0.00142809   0.0028485 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.46 using 59 PHA bins.
# Reduced chi-squared =          1.098 for     56 degrees of freedom 
# Null hypothesis probability =   2.867047e-01
 
Photon flux (15-150 keV)    in 73.49 sec: 0.209830 ( -0.01731  0.017223 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.3426e-06 ( -1.20678e-07  1.20781e-07 ) ergs/cm2
 
Band function
Time interval is from   -3.976 sec. to   69.512 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.585388   ( -0.335269   0.561737 )
beta        : -10.0000    ( 10   0 )
Epeak [keV] : 134.177      ( -29.1599 539.467 )
Norm@50keV   : 3.42006E-03    ( -0.0014296   0.00284836 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.47 using 59 PHA bins.
# Reduced chi-squared =          1.118 for     55 degrees of freedom 
# Null hypothesis probability =   2.556481e-01
 
Photon flux (15-150 keV)    in 73.49 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]    : 19.9429  (-1.73947  1.96772)
R^2/D10^2   : 1.01943E-02  (-0.00270039   0.00357038)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.52 using 59 PHA bins.
# Reduced chi-squared =          1.430 for     57 degrees of freedom 
# Null hypothesis probability =   1.822405e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.750e-08   8.293e-09
25- 50  2.859e-07   3.182e-08
50-150  8.426e-07   9.796e-08
15-150  1.186e-06   1.095e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-15.5333      -200)
Norm        : 0.895558       (-0.0665963     0.0665963)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          86.81 using 59 PHA bins.
# Reduced chi-squared =          1.523 for     57 degrees of freedom 
# Null hypothesis probability =   6.659925e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.639e-07   1.742e-08
25- 50  3.153e-07   4.854e-08
50-150  6.916e-07   2.594e-07
15-150  1.171e-06   2.355e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.12776        (-1.47683      1.99486)
R1^2/D10^2  : 0.442511        (-0.317747      1.5328)
kT2 [keV]   : 24.1321        (-2.88866      4.03944)
R2^2/D10^2  : 5.03415E-03    (-0.00207634   0.00252199)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.55 using 59 PHA bins.
# Reduced chi-squared =          1.028 for     55 degrees of freedom 
# Null hypothesis probability =   4.168484e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.255e-07   5.644e-08
25- 50  2.730e-07   6.331e-08
50-150  9.236e-07   1.867e-07
15-150  1.322e-06   2.355e-07

Peak spectrum fit

Power-law model
Time interval is from    1.980 sec. to    2.980 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.596003     ( -0.50433   0.447432 )
Norm@50keV  : 5.25222E-03    ( -0.00140468   0.0012847 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.96 using 59 PHA bins.
# Reduced chi-squared =         0.9994 for     57 degrees of freedom 
# Null hypothesis probability =   4.764494e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.613525 ( -0.137708  0.138995 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.72949e-08 ( -1.50644e-08  1.50914e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    1.980 sec. to    2.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.601609     ( -0.526048   0.437193 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 5.31825E-03    ( -0.00143187   0.00762791 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.98 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     56 degrees of freedom 
# Null hypothesis probability =   4.382601e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.616530 ( -0.141217  0.136035 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.73641e-08 ( -1.4932e-08  1.48165e-08 ) ergs/cm2
 
Band function
Time interval is from    1.980 sec. to    2.980 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.850869   ( 0.850524   0.850524 )
beta        : -0.596067    ( -0.447181   0.504336 )
Epeak [keV] : 14.0064      ( -14.0092 -14.0092 )
Norm@50keV   : 7.85908E-03    ( -0.00397015   90932.1 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.96 using 59 PHA bins.
# Reduced chi-squared =          1.036 for     55 degrees of freedom 
# Null hypothesis probability =   4.018914e-01
 
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]    : 38.4409  (-11.5095  25.5017)
R^2/D10^2   : 4.92116E-03  (-0.00341835   0.00788901)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.40 using 59 PHA bins.
# Reduced chi-squared =          1.060 for     57 degrees of freedom 
# Null hypothesis probability =   3.540821e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.652e-10   5.741e-10
25- 50  6.506e-09   3.813e-09
50-150  5.916e-08   3.045e-08
15-150  6.663e-08   3.621e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-58.3124      -200)
Norm        : 2.43666       (-0.574279     0.574279)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.06 using 59 PHA bins.
# Reduced chi-squared =          1.229 for     57 degrees of freedom 
# Null hypothesis probability =   1.146544e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.071e-09   3.614e-09
25- 50  1.168e-08   6.905e-09
50-150  2.561e-08   1.518e-08
15-150  4.336e-08   2.529e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.00579        (-2.71762      2.6723)
R1^2/D10^2  : 4.94600        (-4.81345      15730.4)
kT2 [keV]   : 46.5023        (-15.9313      62.0655)
R2^2/D10^2  : 2.94594E-03    (-0.00231601   0.00570807)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.45 using 59 PHA bins.
# Reduced chi-squared =         0.9718 for     55 degrees of freedom 
# Null hypothesis probability =   5.340605e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.265e-09   3.087e-09
25- 50  6.866e-09   3.572e-09
50-150  5.933e-08   3.265e-08
15-150  7.146e-08   3.782e-08
Plot creation:
Sat Dec  5 19:46:18 EST 2015