batgrbproduct Analysis for Trigger=637765

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Apr 12 16:20:42 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger637765/GCN5_download_cron
======================================================================

  Trigger: 00637765      Segment: 000

  BAT Trigger Time: 450473798.656   [s; MET]
      Trigger Stop: 450473799.168   [s; MET]
               UTC: 2015-04-11T19:36:25.222900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 272.073350856765   Dec: -36.9744830883773  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.96
     Image Trigger?:     NO
     Rate S/N Ratio:     13.490737563232  [ if not an image trigger ]
     Image S/N Ratio:    8.96

  Flight Position:   [ source = BAT ]
    RA: 272.073350856765   Dec: -36.9744830883773  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 272.116833322519   Dec: -36.9522631138317  [deg; J2000]  
        { 18h 08m 28.0s , -36d 57' 08.1" }
         +/- 1.23823700453539 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.457253341034054 [arcmin] (formal 1-sigma fit error)
    SNR: 22.4151450351426
 
  Angular difference between Flight and Ground position is 2.474466 arcmin
 
  Partial Coding Fraction: 1.03125    [ including projection effects ]

  Duration
     T90: 22.0000000596046 +/- 6.680665880261
        Measured from: -0.00799989700317383
                   to: 21.9920001626015     [s; relative to TRIGTIME]
     T50: 5.53600007295609 +/- 1.3357844099453
        Measured from: 2.42400008440018
                   to: 7.96000015735626     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 5.54799997806549     
                   to: 6.54799997806549     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.728000044822693     
                   to: 28.6159999966621     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.960227   0.168890   0.063713   0.017988
           0.038376   0.032613   0.026817   0.023695 [error]
 Peak      0.128886   0.025569   0.002886   0.004667
           0.008384   0.006366   0.005001   0.004503 [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 2.83e-07 7.88e-08 1.18e-08 2.00e-09 3.75e-07 3.76e-07   erg/cm2
              Error 3.14e-08 1.68e-08 5.91e-09 1.77e-09 3.84e-08 3.86e-08   erg/cm2
Peak flux Power-law 1.24e+00 2.32e-01 2.10e-02 2.07e-03 1.50e+00 1.50e+00   ph/cm2/s
              Error 1.73e-01 6.04e-02 1.26e-02 2.53e-03 1.96e-01 1.96e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.88e-07 6.44e-08 1.19e-09 5.13e-13 3.53e-07 3.53e-07   erg/cm2
              Error 3.28e-08 2.19e-08 7.50e-09 1.07e-09 3.96e-08 3.95e-08   erg/cm2
Peak flux Cutoff-PL 1.29e+00 1.87e-01 1.15e-03 4.56e-08 1.48e+00 1.48e+00   ph/cm2/s
              Error 1.89e-01 8.38e-02 1.32e-02 1.49e-03 1.96e-01 1.96e-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    4.742    0.426    -      -           3.23e-04 1.27e-04   66.980 57
CPL   1.000    0.000      50.0    0.0      3.72e-03 0.00e+00  230.920 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    4.464    0.505    -      -           1.60e-03 7.73e-04   56.720 57
CPL   1.000    0.000      50.0    0.0      1.52e-02 0.00e+00  156.930 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   29.344   -0.728   28.616
T90    22.000   -0.008   21.992
T50     5.536    2.424    7.960
Peak    1.000    5.548    6.548

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  272.1168 -36.9523 0.0085    6.0  -44.8       0.9645    22.4  TRIG_00637765       
------------------------------------------
 
Foreground time interval of the image:
 -0.728   9.745 (delta_t =  10.473 [sec])
Background time interval of the image:
-51.355  -0.728 (delta_t =  50.627 [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   -0.728 sec. to   28.616 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.74237     ( -0.412317   0.439396 )
Norm@50keV  : 3.22974E-04    ( -0.000110623   0.00014402 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.98 using 59 PHA bins.
# Reduced chi-squared =          1.175 for     57 degrees of freedom 
# Null hypothesis probability =   1.718458e-01
 
Photon flux (15-150 keV)    in 29.34 sec: 0.390588 ( -0.0397256  0.0397765 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.75182e-07 ( -3.83509e-08  3.85419e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.728 sec. to   28.616 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 3.72316E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         230.92 using 59 PHA bins.
# Reduced chi-squared =         4.1235 for     56 degrees of freedom 
# Null hypothesis probability =   4.167750e-23
 
Photon flux (15-150 keV)    in 29.34 sec: 0.381169 ( -0.041427  0.041077 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53224e-07 ( -3.82887e-08  4.08824e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.728 sec. to   28.616 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48350   (     )
beta        : -7.64029    (     )
Epeak [keV] : 34.8691      (   )
Norm@50keV   : 2.90500E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         206.74 using 59 PHA bins.
# Reduced chi-squared =         3.7590 for     55 degrees of freedom 
# Null hypothesis probability =   1.974293e-19
 
Photon flux (15-150 keV)    in 29.34 sec: 0.252186 (    ) 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]    : 3.22796  (-0.304147  0.343467)
R^2/D10^2   : 33.6424  (-16.0738   31.5639)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.59 using 59 PHA bins.
# Reduced chi-squared =          1.168 for     57 degrees of freedom 
# Null hypothesis probability =   1.804682e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.868e-07   6.041e-08
25- 50  5.360e-08   1.345e-08
50-150  1.531e-10   1.107e-10
15-150  3.405e-07   7.579e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 6.59670       (-0.96252      1.20762)
Norm        : 36.2396       (-14.0714     24.1225)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.98 using 59 PHA bins.
# Reduced chi-squared =          1.140 for     57 degrees of freedom 
# Null hypothesis probability =   2.186482e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.877e-07   5.019e-08
25- 50  6.416e-08   1.681e-08
50-150  1.136e-09   7.847e-10
15-150  3.530e-07   6.116e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.15957        (-0.310354      0.344873)
R1^2/D10^2  : 38.1316        (-18.5468      36.5144)
kT2 [keV]   : 39.8500        (-27.079      -39.8495)
R2^2/D10^2  : 2.07174E-04    (-0.000195659   0.00630856)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.58 using 59 PHA bins.
# Reduced chi-squared =          1.120 for     55 degrees of freedom 
# Null hypothesis probability =   2.523115e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.878e-07   7.620e-08
25- 50  5.838e-08   1.698e-08
50-150  8.108e-08   5.389e-08
15-150  4.272e-07   1.073e-07

Peak spectrum fit

Power-law model
Time interval is from    5.548 sec. to    6.548 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.46412     ( -0.477343   0.533482 )
Norm@50keV  : 1.60157E-03    ( -0.000663145   0.000881949 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.72 using 59 PHA bins.
# Reduced chi-squared =         0.9951 for     57 degrees of freedom 
# Null hypothesis probability =   4.855257e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.49653 ( -0.196381  0.196392 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.03991e-08 ( -7.18359e-09  7.34504e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    5.548 sec. to    6.548 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.52077E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         156.93 using 59 PHA bins.
# Reduced chi-squared =         2.8022 for     56 degrees of freedom 
# Null hypothesis probability =   1.667125e-11
 
Photon flux (15-150 keV)    in 1 sec: 1.47842 ( -0.19578  0.19537 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.70478e-08 ( -6.5552e-09  7.1447e-09 ) ergs/cm2
 
Band function
Time interval is from    5.548 sec. to    6.548 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -6.36885   ( 6.36885   6.36885 )
beta        : -4.46409    ( -0.532563   0.477329 )
Epeak [keV] : 3.02812      ( -3.02812 -3.02812 )
Norm@50keV   : 0.217681    ( -0.0901361   0.119864 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.72 using 59 PHA bins.
# Reduced chi-squared =          1.031 for     55 degrees of freedom 
# Null hypothesis probability =   4.106736e-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]    : 3.31363  (-0.386777  0.444892)
R^2/D10^2   : 113.763  (-60.7433   136.085)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.70 using 59 PHA bins.
# Reduced chi-squared =         0.9597 for     57 degrees of freedom 
# Null hypothesis probability =   5.616805e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.844e-08   1.205e-08
25- 50  7.828e-09   2.911e-09
50-150  2.716e-11   2.190e-11
15-150  4.629e-08   1.644e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 7.14838       (-1.33938      1.79417)
Norm        : 113.257       (-49.7386     94.9422)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.56 using 59 PHA bins.
# Reduced chi-squared =         0.9573 for     57 degrees of freedom 
# Null hypothesis probability =   5.669927e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.768e-08   9.520e-09
25- 50  9.703e-09   3.751e-09
50-150  2.321e-10   1.924e-10
15-150  4.762e-08   1.194e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.28897        (-0.388945      0.438211)
R1^2/D10^2  : 118.562        (-54.7209      145.285)
kT2 [keV]   : 200.000        (      )
R2^2/D10^2  : 3.78934E-05    (-3.78904e-05   -3.78904e-05)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.87 using 59 PHA bins.
#Fit statistic : Chi-Squared =          52.85 using 59 PHA bins.
# Reduced chi-squared =         0.9613 for     55 degrees of freedom 
# Reduced chi-squared =         0.9610 for     55 degrees of freedom 
# Null hypothesis probability =   5.564120e-01
# Null hypothesis probability =   5.571216e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.841e-08   1.137e-08
25- 50  8.128e-09   3.057e-09
50-150  1.006e-08   4.901e-09
15-150  5.660e-08   1.720e-08
Plot creation:
Sun Apr 12 16:24:58 EDT 2015