batgrbproduct Analysis for Trigger=653978

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Sep  1 12:19:45 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger653978/GCN5_download_cron
======================================================================

  Trigger: 00653978      Segment: 000

  BAT Trigger Time: 462752382.336   [s; MET]
      Trigger Stop: 462752383.36   [s; MET]
               UTC: 2015-08-31T22:19:27.264720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 271.021331292747   Dec: -27.2521426009604  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.54
     Image Trigger?:     NO
     Rate S/N Ratio:     16.1864140562386  [ if not an image trigger ]
     Image S/N Ratio:    8.54

  Flight Position:   [ source = BAT ]
    RA: 271.021331292747   Dec: -27.2521426009604  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 271.030184816306   Dec: -27.2428874446872  [deg; J2000]  
        { 18h 04m 07.2s , -27d 14' 34.4" }
         +/- 1.969041516803 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.814850082294598 [arcmin] (formal 1-sigma fit error)
    SNR: 11.5545829672116
 
  Angular difference between Flight and Ground position is 0.728975 arcmin
 
  Partial Coding Fraction: 0.0703125    [ including projection effects ]

  Duration
     T90: 6.19200003147125 +/- 1.00993469991815
        Measured from: -0.311999917030334
                   to: 5.88000011444092     [s; relative to TRIGTIME]
     T50: 3.20000004768372 +/- 0.634577021043141
        Measured from: 0.392000079154968
                   to: 3.59200012683868     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.148000001907349     
                   to: 0.851999998092651     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.584000051021576     
                   to: 6.83999997377396     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.570898   0.869497   0.500841   0.188875
           0.079162   0.085156   0.075075   0.063742 [error]
 Peak      0.157233   0.230359   0.202601   0.058001
           0.032865   0.037534   0.033900   0.025734 [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 2.73e-07 4.01e-07 4.40e-07 9.04e-07 1.39e-06 2.02e-06   erg/cm2
              Error 4.93e-08 4.78e-08 7.18e-08 2.96e-07 1.76e-07 3.67e-07   erg/cm2
Peak flux Power-law 2.42e+00 2.06e+00 1.20e+00 1.04e+00 6.13e+00 6.71e+00   ph/cm2/s
              Error 6.45e-01 3.63e-01 2.52e-01 4.16e-01 1.08e+00 1.13e+00   ph/cm2/s
 
Fluence   Cutoff-PL 2.29e-07 4.60e-07 4.62e-07 2.14e-07 1.30e-06 1.36e-06   erg/cm2
              Error 5.94e-08 6.84e-08 8.85e-08 2.77e-07 1.93e-07 3.30e-07   erg/cm2
Peak flux Cutoff-PL 2.02e+00 2.24e+00 1.35e+00 5.37e-01 5.97e+00 6.15e+00   ph/cm2/s
              Error 7.81e-01 4.39e-01 3.29e-01 5.21e-01 1.10e+00 1.21e+00   ph/cm2/s
 
Fluence        Band 2.04e-07 4.89e-07 4.31e-07 4.53e-07 1.31e-06 1.58e-06   erg/cm2
              Error -------- 7.56e-08 8.63e-08 -------- 1.84e-07 --------   erg/cm2
Peak flux      Band 2.08e+00 2.21e+00 1.33e+00 5.96e-01 6.01e+00 6.22e+00   ph/cm2/s
              Error 7.75e-01 4.39e-01 -------- -------- 1.06e+00 1.21e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.868    0.195    -      -           2.04e-02 2.57e-03   64.970 57
CPL   0.608    1.164      52.1   17.5      9.44e-02 2.53e-01   59.750 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.783    0.266    -      -           4.48e-02 7.77e-03   64.890 57
CPL   0.896    1.175      67.0  -23.4      1.21e-01 2.49e-01   62.940 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: 1.472000 sec.
T50 in the 50-300 keV band: 0.896000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    7.424   -0.584    6.840
T90     6.192   -0.312    5.880
T50     3.200    0.392    3.592
Peak    1.000   -0.148    0.852

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  271.0302 -27.2429 0.0166   57.1   -4.9       2.0847    11.6  TRIG_00653978       
------------------------------------------
 
Foreground time interval of the image:
 -0.584   6.840 (delta_t =   7.424 [sec])
Background time interval of the image:
-48.035  -0.584 (delta_t =  47.451 [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   -0.584 sec. to    6.840 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86835     ( -0.190756   0.199065 )
Norm@50keV  : 2.03789E-02    ( -0.00258225   0.0025517 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.97 using 59 PHA bins.
# Reduced chi-squared =          1.140 for     57 degrees of freedom 
# Null hypothesis probability =   2.189381e-01
 
Photon flux (15-150 keV)    in 7.424 sec: 2.88607 ( -0.3519  0.353052 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39089e-06 ( -1.74967e-07  1.76039e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.584 sec. to    6.840 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.608055     ( -1.35532   0.971719 )
Epeak [keV] : 52.1101      ( -9.79309 25.172 )
Norm@50keV  : 9.44041E-02    ( -0.0944315   0.411439 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.75 using 59 PHA bins.
# Reduced chi-squared =          1.067 for     56 degrees of freedom 
# Null hypothesis probability =   3.409988e-01
 
Photon flux (15-150 keV)    in 7.424 sec: 2.75961 ( -0.36786  0.36665 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30149e-06 ( -1.93752e-07  1.93135e-07 ) ergs/cm2
 
Band function
Time interval is from   -0.584 sec. to    6.840 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.333756   ( -1.5098   3.58631 )
beta        : -2.56723    ( 2.56872   0.539739 )
Epeak [keV] : 44.2619      ( -10.0797 11.8731 )
Norm@50keV   : 0.351348    ( -0.392316   57.5797 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.72 using 59 PHA bins.
# Reduced chi-squared =          1.050 for     55 degrees of freedom 
# Null hypothesis probability =   3.749226e-01
 
Photon flux (15-150 keV)    in 7.424 sec: 2.75280 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.31084e-06 ( -1.31079e-06  -1.84405e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.9032  (-1.37335  1.56598)
R^2/D10^2   : 0.742314  (-0.280145   0.438194)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.54 using 59 PHA bins.
# Reduced chi-squared =          1.150 for     57 degrees of freedom 
# Null hypothesis probability =   2.047130e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.650e-07   3.415e-08
25- 50  5.144e-07   8.192e-08
50-150  4.359e-07   1.010e-07
15-150  1.115e-06   1.611e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 89.6750       (-26.3497      47.5548)
Norm        : 13.2611       (-2.24444     2.5717)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.98 using 59 PHA bins.
# Reduced chi-squared =          1.070 for     57 degrees of freedom 
# Null hypothesis probability =   3.347753e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.569e-07   4.599e-08
25- 50  4.341e-07   5.308e-08
50-150  6.595e-07   2.773e-07
15-150  1.350e-06   2.906e-07
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.61511        (-2.28902      1.94113)
R1^2/D10^2  : 1.38066        (-0.574041      1.42193)
kT2 [keV]   : 34.5742        (-19.9427      -38.5132)
R2^2/D10^2  : 6.06598E-03    (-0.00446366   0.075617)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.87 using 59 PHA bins.
#Fit statistic : Chi-Squared =          57.20 using 59 PHA bins.
# Reduced chi-squared =          1.143 for     55 degrees of freedom 
# Reduced chi-squared =          1.040 for     55 degrees of freedom 
# Null hypothesis probability =   2.177313e-01
# Null hypothesis probability =   3.932375e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.190e-07   9.191e-08
25- 50  4.716e-07   1.914e-07
50-150  4.998e-07   1.967e-07
15-150  1.190e-06   3.542e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.148 sec. to    0.852 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78325     ( -0.258355   0.27349 )
Norm@50keV  : 4.47519E-02    ( -0.00781006   0.00772997 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.89 using 59 PHA bins.
# Reduced chi-squared =          1.138 for     57 degrees of freedom 
# Null hypothesis probability =   2.210153e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.12717 ( -1.07851  1.08297 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.12255e-07 ( -7.26685e-08  7.28904e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.148 sec. to    0.852 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.895611     ( -1.32531   1.02454 )
Epeak [keV] : 66.9943      ( -20.2909 -66.996 )
Norm@50keV  : 0.120763    ( -0.120756   0.377947 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.94 using 59 PHA bins.
# Reduced chi-squared =          1.124 for     56 degrees of freedom 
# Null hypothesis probability =   2.442611e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.97396 ( -1.09493  1.09953 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.09383e-07 ( -7.3531e-08  7.3671e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.148 sec. to    0.852 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.895635   ( -6.83344   1.44761 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 66.9691      ( -19.3363 275.73 )
Norm@50keV   : 0.120775    ( -0.120775   0.377912 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.94 using 59 PHA bins.
# Reduced chi-squared =          1.144 for     55 degrees of freedom 
# Null hypothesis probability =   2.159160e-01
 
Photon flux (15-150 keV)    in 1 sec: 6.00654 ( 0.99346  -1.06147 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.09434e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.1271  (-2.59505  2.93221)
R^2/D10^2   : 0.678261  (-0.332476   0.667015)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.11 using 59 PHA bins.
# Reduced chi-squared =          1.230 for     57 degrees of freedom 
# Null hypothesis probability =   1.138824e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.245e-08   1.033e-08
25- 50  1.299e-07   3.295e-08
50-150  2.031e-07   6.370e-08
15-150  3.655e-07   8.610e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 124.018       (-50.8131      -122.006)
Norm        : 25.9116       (-5.17969     6.86942)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.33 using 59 PHA bins.
# Reduced chi-squared =          1.111 for     57 degrees of freedom 
# Null hypothesis probability =   2.631186e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.739e-08   2.080e-08
25- 50  1.213e-07   4.482e-08
50-150  2.199e-07   1.412e-07
15-150  4.085e-07   1.765e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.65341        (-2.93764      3.73424)
R1^2/D10^2  : 13.4259        (-11.2571      410)
kT2 [keV]   : 20.0853        (-4.57358      9.12087)
R2^2/D10^2  : 0.190711    (-0.152194   0.267072)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.87 using 59 PHA bins.
# Reduced chi-squared =          1.125 for     55 degrees of freedom 
# Null hypothesis probability =   2.441822e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.689e-08   3.910e-08
25- 50  1.195e-07   6.325e-08
50-150  2.246e-07   1.334e-07
15-150  4.109e-07   2.005e-07
Plot creation:
Tue Sep  1 12:27:19 EDT 2015