batgrbproduct Analysis for Trigger=632159

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Feb 23 17:15:45 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger632159/GCN5_download_cron
======================================================================

  Trigger: 00632159      Segment: 000

  BAT Trigger Time: 446301084.572   [s; MET]
      Trigger Stop: 446301084.58   [s; MET]
               UTC: 2015-02-22T12:31:11.351580    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 293.723658080581   Dec: 21.8916627473002  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    16.47
     Image Trigger?:     NO
     Rate S/N Ratio:     169.192198401699  [ if not an image trigger ]
     Image S/N Ratio:    16.47

  Flight Position:   [ source = BAT ]
    RA: 293.723658080581   Dec: 21.8916627473002  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 293.721598377964   Dec: 21.8886267769705  [deg; J2000]  
        { 19h 34m 53.2s , +21d 53' 19.1" }
         +/- 1.16458571590581 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.431524818401001 [arcmin] (formal 1-sigma fit error)
    SNR: 24.4673944928748
 
  Angular difference between Flight and Ground position is 0.215247 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 0.0159999132156372 +/- 0.00400000810623169
        Measured from: -0.00399988889694214
                   to: 0.0120000243186951     [s; relative to TRIGTIME]
     T50: 0.00399994850158691 +/- 0.004
        Measured from: 1.19209289550781e-07
                   to: 0.00400006771087646     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.492000043392181     
                   to: 0.507999956607819     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.00400000810623169     
                   to: 0.015999972820282     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.057803   0.046854   0.011147  -0.000361
           0.003377   0.003073   0.001597   0.000630 [error]
 Peak      0.058138   0.041782   0.007603  -0.001092
           0.006441   0.006315   0.004881   0.003875 [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 1.78e-08 1.47e-08 8.24e-09 6.83e-09 4.37e-08 4.75e-08   erg/cm2
              Error 1.71e-09 1.23e-09 1.16e-09 1.70e-09 3.63e-09 4.29e-09   erg/cm2
Peak flux Power-law 4.98e-01 2.85e-01 1.03e-01 4.89e-02 9.12e-01 9.34e-01   ph/cm2/s
              Error 9.09e-02 4.96e-02 3.34e-02 2.80e-02 1.43e-01 1.48e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.57e-08 1.92e-08 7.96e-09 7.98e-10 4.36e-08 4.37e-08   erg/cm2
              Error 1.94e-09 1.91e-09 1.58e-09 6.54e-10 3.58e-09 3.62e-09   erg/cm2
Peak flux Cutoff-PL 4.81e-01 3.52e-01 5.95e-02 1.36e-03 8.94e-01 8.94e-01   ph/cm2/s
              Error 9.92e-02 7.00e-02 4.57e-02 8.81e-03 1.39e-01 1.39e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 4.81e-01 3.52e-01 6.10e-02 -------- 8.94e-01 8.96e-01   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    2.833    0.133    -      -           1.95e-01 2.14e-02   74.870 57
CPL   0.817    0.736      23.7    6.9      3.14e+00 4.10e+00   43.520 56
 
The chi2 of BB fit is 63.19 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    2.469    0.306    -      -           4.73e-03 1.19e-03   55.550 57
CPL   0.181    2.214      25.6   11.4      1.61e-01 8.01e+00   49.190 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.020   -0.004    0.016
T90     0.016   -0.004    0.012
T50     0.004    0.000    0.004
Peak    1.000   -0.492    0.508

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  293.7216 +21.8886 0.0079    0.0  -97.2       0.1184    24.5  TRIG_00632159       
------------------------------------------
 
Foreground time interval of the image:
 -0.004   0.016 (delta_t =   0.020 [sec])
Background time interval of the image:
-119.572  -0.004 (delta_t = 119.568 [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   -0.004 sec. to    0.016 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.83319     ( -0.128502   0.137133 )
Norm@50keV  : 0.195399    ( -0.0215402   0.0212504 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.87 using 59 PHA bins.
# Reduced chi-squared =          1.314 for     57 degrees of freedom 
# Null hypothesis probability =   5.634706e-02
 
Photon flux (15-150 keV)    in 0.02 sec: 47.7306 ( -3.91497  3.91719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.37032e-08 ( -3.62814e-09  3.63302e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.004 sec. to    0.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.816671     ( -0.789234   0.682845 )
Epeak [keV] : 23.6909      ( -8.68089 5.06721 )
Norm@50keV  : 3.13718    ( -1.90376   6.29827 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.52 using 59 PHA bins.
# Reduced chi-squared =         0.7772 for     56 degrees of freedom 
# Null hypothesis probability =   8.879603e-01
 
Photon flux (15-150 keV)    in 0.02 sec: 47.2869 ( -3.952  3.9548 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.36474e-08 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from   -0.004 sec. to    0.016 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.816563   ( -0.579008   0.894037 )
beta        : -10.0000    ( 10   0 )
Epeak [keV] : 23.6852      ( -4.41242 5.06276 )
Norm@50keV   : 3.13792    ( -1.90442   6.30502 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.52 using 59 PHA bins.
# Reduced chi-squared =         0.7913 for     55 degrees of freedom 
# Null hypothesis probability =   8.678750e-01
 
Photon flux (15-150 keV)    in 0.02 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]    : 7.91562  (-0.610107  0.629392)
R^2/D10^2   : 56.1148  (-15.8824   23.0363)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.19 using 59 PHA bins.
# Reduced chi-squared =          1.109 for     57 degrees of freedom 
# Null hypothesis probability =   2.668616e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.261e-08   1.432e-09
25- 50  2.167e-08   2.062e-09
50-150  5.495e-09   1.280e-09
15-150  3.978e-08   3.500e-09
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 28.3444       (-3.38945      3.79963)
Norm        : 418.210       (-58.6598     68.6737)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.19 using 59 PHA bins.
# Reduced chi-squared =         0.7928 for     57 degrees of freedom 
# Null hypothesis probability =   8.706918e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.652e-08   1.582e-09
25- 50  1.828e-08   1.522e-09
50-150  9.279e-09   2.085e-09
15-150  4.407e-08   3.590e-09
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.12787        (-1.13165      1.3124)
R1^2/D10^2  : 498.763        (-326.108      1082.46)
kT2 [keV]   : 10.4588        (-1.39247      2.07401)
R2^2/D10^2  : 12.2601    (-8.07958   14.2766)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.09 using 59 PHA bins.
# Reduced chi-squared =         0.7653 for     55 degrees of freedom 
# Null hypothesis probability =   8.994153e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.608e-08   7.285e-09
25- 50  1.881e-08   8.164e-09
50-150  8.756e-09   4.293e-09
15-150  4.365e-08   1.872e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.492 sec. to    0.508 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.46861     ( -0.287718   0.32407 )
Norm@50keV  : 4.73006E-03    ( -0.00118906   0.00119686 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.55 using 59 PHA bins.
# Reduced chi-squared =         0.9746 for     57 degrees of freedom 
# Null hypothesis probability =   5.295757e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.911615 ( -0.142509  0.14262 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.69078e-08 ( -9.06192e-09  9.49367e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.492 sec. to    0.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.181347     ( -2.73401   1.69351 )
Epeak [keV] : 25.6246      ( -16.7476 6.024 )
Norm@50keV  : 0.161472    ( -0.194765   15.8301 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.19 using 59 PHA bins.
# Reduced chi-squared =         0.8784 for     56 degrees of freedom 
# Null hypothesis probability =   7.284126e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.894184 ( -0.13838  0.139196 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.01104e-08 ( -7.6231e-09  8.9047e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.492 sec. to    0.508 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.32093   ( -1.68823   2.59262 )
beta        : -3.13845    ( 9.37167   19.369 )
Epeak [keV] : 23.1916      ( -11.8358 6.00715 )
Norm@50keV   : 641.892    ( -641.248   194.02 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.42 using 59 PHA bins.
# Reduced chi-squared =         0.8623 for     55 degrees of freedom 
# Null hypothesis probability =   7.561609e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.894199 (    ) 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]    : 6.92212  (-1.0222  1.18169)
R^2/D10^2   : 1.91494  (-0.921309   1.80406)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.67 using 59 PHA bins.
# Reduced chi-squared =         0.8890 for     57 degrees of freedom 
# Null hypothesis probability =   7.097968e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.457e-08   3.361e-09
25- 50  1.952e-08   5.015e-09
50-150  3.106e-09   1.550e-09
15-150  3.720e-08   9.500e-09
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 30.3216       (-8.57279      13.2254)
Norm        : 7.46955       (-1.98469     2.8445)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.44 using 59 PHA bins.
# Reduced chi-squared =         0.8849 for     57 degrees of freedom 
# Null hypothesis probability =   7.178504e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.529e-08   2.885e-09
25- 50  1.757e-08   4.525e-09
50-150  9.756e-09   5.303e-09
15-150  4.261e-08   1.015e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.21883        (-5.23533      -5.23533)
R1^2/D10^2  : 4.25576        (-4.13892      -4.13892)
kT2 [keV]   : 11.5311        (-11.7163      -11.7163)
R2^2/D10^2  : 0.111629    (-0.101274   2.33298)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.33 using 59 PHA bins.
# Reduced chi-squared =         0.8787 for     55 degrees of freedom 
# Null hypothesis probability =   7.255063e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.537e-08   9.045e-09
25- 50  1.826e-08   9.975e-09
50-150  7.736e-09   4.362e-09
15-150  4.136e-08   2.131e-08
Plot creation:
Mon Feb 23 17:17:54 EST 2015