batgrbproduct Analysis for Trigger=668879

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Dec 31 13:02:59 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger668879/batgroup_hand_proc
======================================================================

  Trigger: 00668879      Segment: 000

  BAT Trigger Time: 473208307.136   [s; MET]
      Trigger Stop: 473208315.328   [s; MET]
               UTC: 2015-12-30T22:44:51.507520    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 306.015689590842   Dec: 33.8501595497677  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    7.91
     Image Trigger?:     NO
     Rate S/N Ratio:     10.1488915650922  [ if not an image trigger ]
     Image S/N Ratio:    7.91

  Flight Position:   [ source = BAT ]
    RA: 306.015689590842   Dec: 33.8501595497677  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 305.988635553082   Dec: 33.8524042654816  [deg; J2000]  
        { 20h 23m 57.3s , +33d 51' 08.7" }
         +/- 1.63467657021393 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.577473419716386 [arcmin] (formal 1-sigma fit error)
    SNR: 15.0735572365866
 
  Angular difference between Flight and Ground position is 1.354792 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 64 +/- 22.6274169979695
        Measured from: -15.1359999775887
                   to: 48.8640000224113     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: 0.864000022411346
                   to: 16.8640000224113     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.36400002241135     
                   to: 9.36400002241135     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15.1359999775887     
                   to: 48.8640000224113     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.487726   0.505166   0.439835   0.093683
           0.052146   0.051250   0.044527   0.039591 [error]
 Peak      0.007931   0.014022   0.011441  -0.000785
           0.006541   0.006432   0.005675   0.005002 [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 1.13e-07 2.16e-07 3.19e-07 1.01e-06 9.01e-07 1.66e-06   erg/cm2
              Error 2.04e-08 2.31e-08 4.32e-08 3.02e-07 1.04e-07 3.33e-07   erg/cm2
Peak flux Power-law 7.45e-02 7.97e-02 6.06e-02 7.50e-02 2.43e-01 2.90e-01   ph/cm2/s
              Error 7.61e-02 6.45e-02 4.28e-02 1.24e-01 1.44e-01 1.77e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.13e-07 2.17e-07 3.17e-07 9.95e-07 8.96e-07 1.57e-06   erg/cm2
              Error 1.56e-08 2.30e-08 4.26e-08 4.19e-07 1.03e-07 4.46e-07   erg/cm2
Peak flux Cutoff-PL 6.44e-02 8.88e-02 6.46e-02 2.72e-02 2.36e-01 2.46e-01   ph/cm2/s
              Error 7.39e-02 4.94e-02 5.88e-02 6.87e-02 1.43e-01 1.79e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 6.57e-02 8.70e-02 6.48e-02 3.29e-02 2.38e-01 2.50e-01   ph/cm2/s
              Error 7.40e-02 -------- -------- -------- 1.43e-01 1.82e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.440    0.185    -      -           1.47e-03 1.51e-04   55.390 57
CPL   1.432    0.186    9999.3    0.0      1.47e-03 1.20e-03   55.410 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    1.397    1.085    -      -           2.00e-03 1.59e-03   59.220 57
CPL   0.439    6.814      78.2    0.0      6.37e-03 0.00e+00   58.930 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: 36.928000 sec.
T50 in the 50-300 keV band: 19.008000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   64.000  -15.136   48.864
T90    64.000  -15.136   48.864
T50    16.000    0.864   16.864
Peak    1.000    8.364    9.364

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  305.9886    33.8524   0.0128     0.0452   143.4648         1.5512219     15.074 TRIG_00668879                 
 
Foreground time interval of the image:
-15.136  48.864 (delta_t =  64.000 [sec])
Background time interval of the image:
-239.136 -15.136 (delta_t = 224.000 [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  -15.136 sec. to   48.864 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44034     ( -0.185362   0.185315 )
Norm@50keV  : 1.46824E-03    ( -0.000151789   0.000150906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.39 using 59 PHA bins.
# Reduced chi-squared =         0.9718 for     57 degrees of freedom 
# Null hypothesis probability =   5.355693e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.180511 ( -0.0185054  0.0185506 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.00819e-07 ( -1.03761e-07  1.04954e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -15.136 sec. to   48.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43229     ( -0.184848   0.188088 )
Epeak [keV] : 9999.30      ( -9999.36 -9999.36 )
Norm@50keV  : 1.47291E-03    ( -0.00147334   0.00092458 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.41 using 59 PHA bins.
# Reduced chi-squared =         0.9894 for     56 degrees of freedom 
# Null hypothesis probability =   4.972466e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.180717 ( -0.018713  0.0183 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.96224e-07 ( -9.94176e-08  1.07354e-07 ) ergs/cm2
 
Band function
Time interval is from  -15.136 sec. to   48.864 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.96467   ( -4.96467   -4.96467 )
beta        : -1.49450    ( -0.23641   0.201935 )
Epeak [keV] : 22.5139      ( -22.5139 6.25179 )
Norm@50keV   : 266.127    ( -26.6642   666471 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.55 using 59 PHA bins.
# Reduced chi-squared =         0.9918 for     55 degrees of freedom 
# Null hypothesis probability =   4.917759e-01
 
Photon flux (15-150 keV)    in 64 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]    : 15.3019  (-2.30734  2.83047)
R^2/D10^2   : 1.84788E-02  (-0.00813213   0.0142171)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          91.75 using 59 PHA bins.
# Reduced chi-squared =          1.610 for     57 degrees of freedom 
# Null hypothesis probability =   2.405578e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.778e-08   1.161e-08
25- 50  2.338e-07   4.032e-08
50-150  3.758e-07   8.512e-08
15-150  6.673e-07   9.939e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-53.1245      -200)
Norm        : 0.738896       (-0.0745087     0.0745087)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.91 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     57 degrees of freedom 
# Null hypothesis probability =   4.413838e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.178e-07   2.534e-08
25- 50  2.265e-07   1.221e-07
50-150  4.968e-07   2.697e-07
15-150  8.412e-07   4.246e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.85561        (-1.52511      1.91364)
R1^2/D10^2  : 0.226954        (-0.130417      0.346808)
kT2 [keV]   : 34.8006        (-10.0796      28.1341)
R2^2/D10^2  : 1.02020E-03    (-0.00080333   0.00200736)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.96 using 59 PHA bins.
# Reduced chi-squared =         0.9629 for     55 degrees of freedom 
# Null hypothesis probability =   5.529593e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.185e-07   4.853e-08
25- 50  2.144e-07   7.482e-08
50-150  6.050e-07   3.174e-07
15-150  9.379e-07   3.606e-07

Peak spectrum fit

Power-law model
Time interval is from    8.364 sec. to    9.364 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39705     ( -1.09191   1.07784 )
Norm@50keV  : 1.99890E-03    ( -0.00199905   0.00118851 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.22 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     57 degrees of freedom 
# Null hypothesis probability =   3.943890e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.243249 ( -0.14307  0.144375 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.93299e-08 ( -1.21408e-08  1.30862e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    8.364 sec. to    9.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.439216     ( -6.39255   7.23571 )
Epeak [keV] : 78.2138      ( -78.0902 -78.0902 )
Norm@50keV  : 6.37159E-03    ( -0.00645095   -0.00645095 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.93 using 59 PHA bins.
# Reduced chi-squared =          1.052 for     56 degrees of freedom 
# Null hypothesis probability =   3.689409e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.236133 ( -0.14051  0.145064 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.79201e-08 ( -1.31816e-08  1.37811e-08 ) ergs/cm2
 
Band function
Time interval is from    8.364 sec. to    9.364 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.435625   ( -5.17427   0.805793 )
beta        : -10.0000    ( 10   10 )
Epeak [keV] : 76.4162      ( -56.8817 -76.5507 )
Norm@50keV   : 6.55270E-03    ( -0.0065316   22.6972 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.93 using 59 PHA bins.
# Reduced chi-squared =          1.071 for     55 degrees of freedom 
# Null hypothesis probability =   3.338964e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.238376 ( 6.76162  -0.142572 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.86653e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.3794  (-15.4256  26.1613)
R^2/D10^2   : 2.63011E-02  (-0.025897   0.701866)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.51 using 59 PHA bins.
# Reduced chi-squared =          1.044 for     57 degrees of freedom 
# Null hypothesis probability =   3.843191e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.297e-09   9.170e-10
25- 50  5.271e-09   3.557e-09
50-150  8.577e-09   6.425e-09
15-150  1.514e-08   1.159e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.360       (-199.362      -199.362)
Norm        : 1.00896       (-0.587244     0.917423)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.13 using 59 PHA bins.
# Reduced chi-squared =          1.037 for     57 degrees of freedom 
# Null hypothesis probability =   3.976468e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.512e-09   1.806e-09
25- 50  4.833e-09   3.500e-09
50-150  1.060e-08   7.265e-09
15-150  1.794e-08   1.247e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.91648        (-7.14814      87.0057)
R1^2/D10^2  : 0.263371        (-0.258499      -0.258499)
kT2 [keV]   : 25.8930        (-26.2518      -26.2518)
R2^2/D10^2  : 3.42295E-03    (-0.00329479   0.374776)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.53 using 59 PHA bins.
# Reduced chi-squared =          1.064 for     55 degrees of freedom 
# Null hypothesis probability =   3.473030e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.390e-09   1.819e-09
25- 50  4.932e-09   3.340e-09
50-150  1.159e-08   9.040e-09
15-150  1.891e-08   1.029e-08
Plot creation:
Thu Dec 31 13:10:32 EST 2015