batgrbproduct Analysis for Trigger=623368

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Jan  4 06:48:24 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger623368/GCN5_download_cron
======================================================================

  Trigger: 00623368      Segment: 000

  BAT Trigger Time: 442008152   [s; MET]
      Trigger Stop: 442008216   [s; MET]
               UTC: 2015-01-03T20:02:18.996300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 131.639444320183   Dec: -48.8904166081603  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.36
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.36

  Flight Position:   [ source = BAT ]
    RA: 131.639444320183   Dec: -48.8904166081603  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 131.674434662895   Dec: -48.8958619039495  [deg; J2000]  
        { 08h 46m 41.9s , -48d 53' 45.1" }
         +/- 2.04418812674399 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.674492768752162 [arcmin] (formal 1-sigma fit error)
    SNR: 10.9525980395075
 
  Angular difference between Flight and Ground position is 1.418437 arcmin
 
  Partial Coding Fraction: 0.671875    [ including projection effects ]

  Duration
     T90: 49.0879999995232 +/- 9.80709947303509
        Measured from: 10.6000001430511
                   to: 59.6880001425743     [s; relative to TRIGTIME]
     T50: 21.8880000114441 +/- 6.18287702713734
        Measured from: 24.040000140667
                   to: 45.9280001521111     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 26.3240000009537     
                   to: 27.3240000009537     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 6.05599999427795     
                   to: 64.6800000071526     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.427352   0.694482   0.431753   0.007400
           0.061331   0.062491   0.052901   0.045712 [error]
 Peak      0.029520   0.025164   0.008190   0.004965
           0.008221   0.008289   0.006887   0.006067 [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 1.44e-07 2.48e-07 3.26e-07 8.71e-07 9.53e-07 1.59e-06   erg/cm2
              Error 2.36e-08 2.75e-08 4.96e-08 2.66e-07 1.21e-07 3.14e-07   erg/cm2
Peak flux Power-law 2.45e-01 1.68e-01 7.54e-02 4.70e-02 5.12e-01 5.36e-01   ph/cm2/s
              Error 1.06e-01 6.36e-02 4.54e-02 5.74e-02 1.87e-01 1.99e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.22e-07 3.00e-07 3.17e-07 1.10e-07 8.25e-07 8.49e-07   erg/cm2
              Error 2.71e-08 4.00e-08 6.49e-08 1.28e-07 1.27e-07 1.77e-07   erg/cm2
Peak flux Cutoff-PL 2.14e-01 2.51e-01 5.44e-02 9.49e-04 5.20e-01 5.20e-01   ph/cm2/s
              Error 1.19e-01 9.67e-02 6.05e-02 1.35e-02 1.79e-01 1.79e-01   ph/cm2/s
 
Fluence        Band 1.19e-07 3.06e-07 3.02e-07 2.89e-07 8.50e-07 1.02e-06   erg/cm2
              Error 2.75e-08 4.18e-08 6.62e-08 -------- -------- --------   erg/cm2
Peak flux      Band 2.13e-01 2.49e-01 6.21e-02 1.81e-03 5.27e-01 5.27e-01   ph/cm2/s
              Error 1.19e-01 9.68e-02 -------- -------- 1.81e-01 --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.605    0.177    -      -           1.74e-03 2.05e-04   66.380 57
CPL  -0.033    1.007      54.2   12.8      1.43e-02 3.04e-02   54.700 56
 
The chi2 of BB fit is 59.47 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    2.147    0.609    -      -           3.18e-03 1.53e-03   50.880 57
CPL  -1.155    0.802      35.0   13.5      3.80e-01 6.36e+05   46.500 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   58.624    6.056   64.680
T90    49.088   10.600   59.688
T50    21.888   24.040   45.928
Peak    1.000   26.324   27.324

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  131.6744 -48.8959 0.0176   20.1   66.0       1.4337    11.0  TRIG_00623368       
------------------------------------------
 
Foreground time interval of the image:
  6.056  64.680 (delta_t =  58.624 [sec])
Background time interval of the image:
-239.000   6.056 (delta_t = 245.056 [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    6.056 sec. to   64.680 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60505     ( -0.175266   0.178124 )
Norm@50keV  : 1.73955E-03    ( -0.000205693   0.000204014 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.38 using 59 PHA bins.
# Reduced chi-squared =          1.165 for     57 degrees of freedom 
# Null hypothesis probability =   1.851204e-01
 
Photon flux (15-150 keV)    in 58.62 sec: 0.223890 ( -0.0247404  0.0247525 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.53155e-07 ( -1.19846e-07  1.21675e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    6.056 sec. to   64.680 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -3.28240E-02     ( -1.12331   0.890657 )
Epeak [keV] : 54.2325      ( -8.44558 17.2187 )
Norm@50keV  : 1.42620E-02    ( -0.0142629   0.0465912 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.70 using 59 PHA bins.
# Reduced chi-squared =         0.9767 for     56 degrees of freedom 
# Null hypothesis probability =   5.243169e-01
 
Photon flux (15-150 keV)    in 58.62 sec: 0.212992 ( -0.025139  0.025242 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.25035e-07 ( -1.22434e-07  1.32557e-07 ) ergs/cm2
 
Band function
Time interval is from    6.056 sec. to   64.680 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.30784E-02   ( -0.779617   1.03818 )
beta        : -10.0000    ( 10   1.77636e-15 )
Epeak [keV] : 54.2204      ( -7.91982 17.241 )
Norm@50keV   : 1.42689E-02    ( -0.0142689   0.0466759 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.70 using 59 PHA bins.
# Reduced chi-squared =         0.9945 for     55 degrees of freedom 
# Null hypothesis probability =   4.862011e-01
 
Photon flux (15-150 keV)    in 58.62 sec: 0.249351 ( 6.75065  -0.031308 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.50389e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.4310  (-1.38917  1.60142)
R^2/D10^2   : 5.13676E-02  (-0.0184758   0.0278892)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.47 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     57 degrees of freedom 
# Null hypothesis probability =   3.858562e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.863e-08   1.808e-08
25- 50  3.233e-07   4.074e-08
50-150  3.074e-07   7.665e-08
15-150  7.293e-07   9.584e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 140.207       (-50.7214      -138.728)
Norm        : 0.943604       (-0.114486     0.139833)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.09 using 59 PHA bins.
# Reduced chi-squared =          1.072 for     57 degrees of freedom 
# Null hypothesis probability =   3.312206e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.428e-07   3.130e-08
25- 50  2.621e-07   9.669e-08
50-150  5.027e-07   2.969e-07
15-150  9.076e-07   3.840e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.11176        (-3.32179      3.58233)
R1^2/D10^2  : 0.140681        (-0.0827951      0.401759)
kT2 [keV]   : 20.2237        (-11.6126      68.4016)
R2^2/D10^2  : 5.39121E-03    (-0.00535458   0.0170151)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.39 using 59 PHA bins.
# Reduced chi-squared =         0.9707 for     55 degrees of freedom 
# Null hypothesis probability =   5.363798e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.239e-07   6.788e-08
25- 50  3.022e-07   1.561e-07
50-150  4.268e-07   2.390e-07
15-150  8.529e-07   4.353e-07

Peak spectrum fit

Power-law model
Time interval is from   26.324 sec. to   27.324 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.14670     ( -0.548725   0.668629 )
Norm@50keV  : 3.17775E-03    ( -0.00153035   0.0015265 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.88 using 59 PHA bins.
# Reduced chi-squared =         0.8926 for     57 degrees of freedom 
# Null hypothesis probability =   7.026582e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.511539 ( -0.186907  0.187454 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.9569e-08 ( -1.24769e-08  1.36055e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   26.324 sec. to   27.324 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.15519     ( 1.19659   2.801 )
Epeak [keV] : 34.9766      ( -11.1767 15.7363 )
Norm@50keV  : 0.380304    ( -0.445487   1.27243e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.50 using 59 PHA bins.
# Reduced chi-squared =         0.8304 for     56 degrees of freedom 
# Null hypothesis probability =   8.133141e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.519846 ( -0.177849  0.179873 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.6241e-08 ( -1.01797e-08  1.16538e-08 ) ergs/cm2
 
Band function
Time interval is from   26.324 sec. to   27.324 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -6.48997   -5 )
beta        : -3.33041    ( 3.33081   1.17078 )
Epeak [keV] : 28.6452      ( -7.75722 8.2333 )
Norm@50keV   : 311.798    ( -102.783   1980.6 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.27 using 59 PHA bins.
# Reduced chi-squared =         0.8412 for     55 degrees of freedom 
# Null hypothesis probability =   7.930265e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.527263 ( 6.47274  -0.187075 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.71901e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.94354  (-2.51138  3.38068)
R^2/D10^2   : 0.429600  (-0.429609   1.09625)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.55 using 59 PHA bins.
# Reduced chi-squared =         0.8167 for     57 degrees of freedom 
# Null hypothesis probability =   8.370605e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.668e-09   4.132e-09
25- 50  1.403e-08   8.710e-09
50-150  5.251e-09   4.251e-09
15-150  2.595e-08   1.665e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 44.5561       (-23.0764      71.3856)
Norm        : 3.29456       (-1.44832     2.43666)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.62 using 59 PHA bins.
# Reduced chi-squared =         0.8529 for     57 degrees of freedom 
# Null hypothesis probability =   7.775387e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.822e-09   4.849e-09
25- 50  1.076e-08   6.850e-09
50-150  9.329e-09   7.520e-09
15-150  2.791e-08   1.901e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.48408        (-6.54706      -6.54706)
R1^2/D10^2  : 0.482875        (-0.506081      -0.506081)
kT2 [keV]   : 10.2655        (-10.4531      189.528)
R2^2/D10^2  : 0.180005    (-0.156366   -0.156366)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.48 using 59 PHA bins.
# Reduced chi-squared =         0.8451 for     55 degrees of freedom 
# Null hypothesis probability =   7.864883e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.887e-09   4.514e-07
25- 50  1.356e-08   3.285e-06
50-150  6.092e-09   4.429e-05
15-150  2.654e-08   5.600e-05
Plot creation:
Sun Jan  4 06:51:52 EST 2015