batgrbproduct Analysis for Trigger=635887

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Mar 23 14:57:06 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger635887/batgroup_hand_proc
======================================================================

  Trigger: 00635887      Segment: 000

  BAT Trigger Time: 448771764   [s; MET]
      Trigger Stop: 448771782   [s; MET]
               UTC: 2015-03-23T02:49:10.653860    [includes UTCF correction] 
       Where From?: Command line

  BAT 
    RA: 128.191265245984   Dec: 45.4343019594773  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.18
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.18

  Flight Position:   [ source = EXTERNAL ]
    RA: 128.173   Dec: 45.4416  [deg; J2000]


  Partial Coding Fraction: 0.328125    [ including projection effects ]

 
  Angular difference between Flight and Ground position is 0.000000 arcmin
 
  Partial Coding Fraction: 0.328125    [ including projection effects ]

  Duration
     T90: 149.5759999156 +/- 8.92164313190198
        Measured from: 7.50800013542175
                   to: 157.084000051022     [s; relative to TRIGTIME]
     T50: 12.6679999232292 +/- 1.04837398185967
        Measured from: 128.632000148296
                   to: 141.300000071526     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 135.639999985695     
                   to: 136.639999985695     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 2.59200000762939     
                   to: 195.407999992371     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.353903   3.650897   2.400393   0.542941
           0.111614   0.115934   0.100252   0.083712 [error]
 Peak      0.203992   0.211837   0.133711   0.025361
           0.008318   0.008345   0.007223   0.004761 [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 1.17e-06 1.74e-06 1.93e-06 4.02e-06 6.06e-06 8.86e-06   erg/cm2
              Error 8.05e-08 6.98e-08 1.04e-07 4.72e-07 2.45e-07 5.48e-07   erg/cm2
Peak flux Power-law 2.40e+00 1.82e+00 9.15e-01 6.61e-01 5.44e+00 5.80e+00   ph/cm2/s
              Error 1.93e-01 8.80e-02 6.24e-02 9.09e-02 2.75e-01 2.75e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.12e-06 1.77e-06 1.95e-06 2.95e-06 5.96e-06 7.79e-06   erg/cm2
              Error 1.02e-07 8.04e-08 1.11e-07 -------- 2.76e-07 8.70e-07   erg/cm2
Peak flux Cutoff-PL 2.30e+00 1.85e+00 9.30e-01 5.19e-01 5.36e+00 5.60e+00   ph/cm2/s
              Error 2.44e-01 1.01e-01 6.78e-02 1.50e-01 2.99e-01 3.82e-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    1.853    0.074    -      -           3.42e-03 1.37e-04   44.520 57
CPL   1.632    0.289      84.7  -30.2      4.39e-03 1.41e-03   42.820 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    1.988    0.090    -      -           3.65e-02 1.88e-03   65.170 57
CPL   1.766    0.357      52.3    0.0      4.72e-02 0.00e+00   63.970 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: 143.104000 sec.
T50 in the 50-300 keV band: 47.552000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  192.816    2.592  195.408
T90   149.576    7.508  157.084
T50    12.668  128.632  141.300
Peak    1.000  135.640  136.640

Image

Pre-slew 15.0-150.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  128.1730    45.4416   0.0178    42.1563  -139.7740         1.4799729     10.754 TRIG_00635887                 
 
Foreground time interval of the image:
  0.000  18.000 (delta_t =  18.000 [sec])
Background time interval of the image:
 -7.889   0.000 (delta_t =   7.889 [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    2.592 sec. to  195.408 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85259     ( -0.0732372   0.0740766 )
Norm@50keV  : 3.41770E-03    ( -0.000137253   0.000136754 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.52 using 59 PHA bins.
# Reduced chi-squared =         0.7811 for     57 degrees of freedom 
# Null hypothesis probability =   8.855589e-01
 
Photon flux (15-150 keV)    in 192.8 sec: 0.480899 ( -0.0201235  0.0202042 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.05857e-06 ( -2.44305e-07  2.44885e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    2.592 sec. to  195.408 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63183     ( -0.305761   0.271908 )
Epeak [keV] : 84.7432      ( -24.3197 -84.7431 )
Norm@50keV  : 4.38824E-03    ( -0.00105127   0.00176842 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.82 using 59 PHA bins.
# Reduced chi-squared =         0.7646 for     56 degrees of freedom 
# Null hypothesis probability =   9.023981e-01
 
Photon flux (15-150 keV)    in 192.8 sec: 0.472988 ( -0.022365  0.022467 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.96249e-06 ( -2.76668e-07  2.75511e-07 ) ergs/cm2
 
Band function
Time interval is from    2.592 sec. to  195.408 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.63191   ( -0.17196   0.266686 )
beta        : -10.00000    ( 10   20 )
Epeak [keV] : 84.7389      ( -22.0899 -84.7389 )
Norm@50keV   : 4.38696E-03    ( -0.000167054   0.00176911 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.82 using 59 PHA bins.
# Reduced chi-squared =         0.7785 for     55 degrees of freedom 
# Null hypothesis probability =   8.841117e-01
 
Photon flux (15-150 keV)    in 192.8 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]    : 13.2307  (  )
R^2/D10^2   : 7.57990E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         198.35 using 59 PHA bins.
# Reduced chi-squared =         3.4798 for     57 degrees of freedom 
# Null hypothesis probability =   1.624459e-17
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.423e-07   4.251e-08
25- 50  1.903e-06   9.148e-08
50-150  2.128e-06   1.677e-07
15-150  4.574e-06   1.947e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 101.313       (-12.6498      20.4201)
Norm        : 2.07838       (-0.132716     0.12052)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.28 using 59 PHA bins.
# Reduced chi-squared =         0.8120 for     57 degrees of freedom 
# Null hypothesis probability =   8.440165e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.047e-06   8.377e-08
25- 50  1.816e-06   9.062e-08
50-150  2.964e-06   7.490e-07
15-150  5.827e-06   8.020e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.80566        (-1.00883      1.23004)
R1^2/D10^2  : 1.08933        (-0.53402      1.28654)
kT2 [keV]   : 20.8486        (-2.5135      3.82348)
R2^2/D10^2  : 1.10495E-02    (-0.00531724   0.00755337)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.61 using 59 PHA bins.
# Reduced chi-squared =          1.011 for     55 degrees of freedom 
# Null hypothesis probability =   4.517520e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.071e-06   1.820e-07
25- 50  1.729e-06   1.664e-07
50-150  2.974e-06   3.374e-07
15-150  5.773e-06   5.138e-07

Peak spectrum fit

Power-law model
Time interval is from  135.640 sec. to  136.640 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.98811     ( -0.0890112   0.0910228 )
Norm@50keV  : 3.64827E-02    ( -0.00189142   0.00187627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.17 using 59 PHA bins.
# Reduced chi-squared =          1.143 for     57 degrees of freedom 
# Null hypothesis probability =   2.138959e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.44271 ( -0.274115  0.275118 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.36236e-07 ( -1.67702e-08  1.68242e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  135.640 sec. to  136.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.76626     ( -0.369648   0.344403 )
Epeak [keV] : 52.3136      (   )
Norm@50keV  : 4.72173E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.97 using 59 PHA bins.
# Reduced chi-squared =          1.142 for     56 degrees of freedom 
# Null hypothesis probability =   2.169574e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.36181 ( -0.29887  0.30004 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.31456e-07 ( -1.8535e-08  1.8438e-08 ) ergs/cm2
 
Band function
Time interval is from  135.640 sec. to  136.640 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.76674   ( 1.81058   0.410149 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 52.3068      ( -21.3508 -52.3068 )
Norm@50keV   : 4.71802E-02    ( -0.0119491   0.0247792 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.97 using 59 PHA bins.
# Reduced chi-squared =          1.163 for     55 degrees of freedom 
# Null hypothesis probability =   1.906042e-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]    : 12.0610  (  )
R^2/D10^2   : 1.18499  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         176.60 using 59 PHA bins.
# Reduced chi-squared =         3.0982 for     57 degrees of freedom 
# Null hypothesis probability =   3.685327e-14
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.647e-08   3.205e-09
25- 50  1.155e-07   6.300e-09
50-150  1.013e-07   1.092e-08
15-150  2.533e-07   1.465e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 81.4220       (-11.6235      14.7489)
Norm        : 24.6989       (-1.88987     2.08251)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.15 using 59 PHA bins.
# Reduced chi-squared =          1.196 for     57 degrees of freedom 
# Null hypothesis probability =   1.482006e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.416e-08   4.705e-09
25- 50  1.061e-07   5.300e-09
50-150  1.515e-07   1.515e-08
15-150  3.217e-07   1.700e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.96605        (-0.935313      1.23253)
R1^2/D10^2  : 24.6471        (-14.3456      39.2042)
kT2 [keV]   : 18.4009        (-2.19475      3.29316)
R2^2/D10^2  : 0.190836    (-0.0950692   0.133596)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.39 using 59 PHA bins.
# Reduced chi-squared =          1.334 for     55 degrees of freedom 
# Null hypothesis probability =   4.935033e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.117e-08   1.618e-08
25- 50  9.783e-08   1.061e-08
50-150  1.507e-07   2.065e-08
15-150  3.197e-07   3.770e-08
Plot creation:
Mon Mar 23 18:25:48 EDT 2015