batgrbproduct Analysis for Trigger=618634

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Nov 15 06:39:08 EST 2014
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger618634/GCN5_download_cron
======================================================================

  Trigger: 00618634      Segment: 000

  BAT Trigger Time: 437692285.12   [s; MET]
      Trigger Stop: 437692312   [s; MET]
               UTC: 2014-11-14T21:11:12.331980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 135.535845302648   Dec: -40.5342672971675  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    16.14
     Image Trigger?:     NO
     Rate S/N Ratio:     18.4390889145858  [ if not an image trigger ]
     Image S/N Ratio:    16.14

  Flight Position:   [ source = BAT ]
    RA: 135.535845302648   Dec: -40.5342672971675  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 135.471650394544   Dec: -40.5431615249011  [deg; J2000]  
        { 09h 01m 53.2s , -40d 32' 35.4" }
         +/- 2.43756689662146 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.57912222774369 [arcmin] (formal 1-sigma fit error)
    SNR: 8.51771918685752
 
  Angular difference between Flight and Ground position is 2.975408 arcmin
 
  Partial Coding Fraction: 0.7109375    [ including projection effects ]

  Duration
     T90: 938.699999928474 +/- 74.6540939881991
        Measured from: -88.6439998745918
                   to: 850.056000053883     [s; relative to TRIGTIME]
     T50: 475.771999955177 +/- 56.9782176214038
        Measured from: 87.0000001192093
                   to: 562.772000074387     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 23.0320000052452     
                   to: 24.0320000052452     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -144.736000001431     
                   to: 883.296000003815     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    16.374861  11.509735   0.714066   0.158465
           0.200597   0.200963   0.166841   0.144241 [error]
 Peak      0.061157   0.042559   0.007790   0.001169
           0.007632   0.007677   0.005728   0.005201 [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 6.83e-06 4.04e-06 1.52e-06 7.60e-07 1.28e-05 1.32e-05   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Power-law 5.98e-01 3.03e-01 9.46e-02 3.77e-02 1.02e+00 1.03e+00   ph/cm2/s
              Error 1.21e-01 6.42e-02 3.98e-02 2.81e-02 1.79e-01 1.84e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.95e-06 4.87e-06 3.04e-07 1.48e-10 1.01e-05 1.01e-05   erg/cm2
              Error 4.04e-07 1.78e-07 7.60e-08 2.34e-10 4.62e-07 4.62e-07   erg/cm2
Peak flux Cutoff-PL 5.97e-01 3.43e-01 5.72e-02 2.09e-03 9.99e-01 9.99e-01   ph/cm2/s
              Error 1.28e-01 8.60e-02 5.68e-02 2.89e-02 1.77e-01 1.77e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 6.24e-01 3.20e-01 7.24e-02 1.97e-02 1.03e+00 1.04e+00   ph/cm2/s
              Error 1.37e-01 -------- -------- -------- 1.81e-01 1.86e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.410    0.000    -      -           8.35e-04 0.00e+00  307.220 57
CPL   1.000    0.000      50.0    0.0      3.14e-03 0.00e+00 1251.770 56
 
The chi2 of BB fit is 71.43 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    2.679    0.393    -      -           4.62e-03 1.51e-03   51.500 57
CPL   1.086    2.574      17.3    0.0      5.96e-02 0.00e+00   49.890 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 1028.030 -144.736  883.296
T90   938.700  -88.644  850.056
T50   475.772   87.000  562.772
Peak    1.000   23.032   24.032

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  135.4717 -40.5432 0.0225   22.4  -98.9       2.9331     8.5  TRIG_00618634       
------------------------------------------
 
Foreground time interval of the image:
-144.736  81.981 (delta_t = 226.717 [sec])
Background time interval of the image:
-239.120 -144.736 (delta_t =  94.384 [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 -144.736 sec. to  883.296 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.40979     (     )
Norm@50keV  : 8.34807E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         307.22 using 59 PHA bins.
# Reduced chi-squared =         5.3897 for     57 degrees of freedom 
# Null hypothesis probability =   5.516450e-36
 
Photon flux (15-150 keV)    in 1028 sec: 0.314003 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2792e-05 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -144.736 sec. to  883.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 3.13631E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =        1251.77 using 59 PHA bins.
# Reduced chi-squared =        22.3530 for     56 degrees of freedom 
# Null hypothesis probability =  4.674856e-225
 
Photon flux (15-150 keV)    in 1028 sec: 0.249165 ( -0.013795  0.013968 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01196e-05 ( -4.60112e-07  4.63926e-07 ) ergs/cm2
 
Band function
Time interval is from -144.736 sec. to  883.296 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.48817   (     )
beta        : -5.30627    (     )
Epeak [keV] : 8.35660      (   )
Norm@50keV   : 1.61184E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         154.02 using 59 PHA bins.
# Reduced chi-squared =         2.8004 for     55 degrees of freedom 
# Null hypothesis probability =   2.555692e-11
 
Photon flux (15-150 keV)    in 1028 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]    : 5.76644  (-0.147984  0.152451)
R^2/D10^2   : 1.23227  (-0.159233   0.182759)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.43 using 59 PHA bins.
# Reduced chi-squared =          1.253 for     57 degrees of freedom 
# Null hypothesis probability =   9.454946e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.275e-06   2.991e-07
25- 50  4.819e-06   1.701e-07
50-150  3.739e-07   4.837e-08
15-150  1.047e-05   3.531e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 15.4798       (      )
Norm        : 5.14621       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         148.50 using 59 PHA bins.
# Reduced chi-squared =         2.6052 for     57 degrees of freedom 
# Null hypothesis probability =   4.317951e-10
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.374e-06   2.930e-07
25- 50  4.479e-06   1.670e-07
50-150  8.405e-07   1.057e-07
15-150  1.169e-05   3.906e-07
Double BB
R1^2/D10^2  : 2.99381E-06        (      )
kT2 [keV]   : 5.72163        (-0.148413      0.155309)
R2^2/D10^2  : 1.27619    (-0.16986   0.195202)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.43 using 59 PHA bins.
#Fit statistic : Chi-Squared =          66.78 using 59 PHA bins.
#Fit statistic : Chi-Squared =          66.52 using 59 PHA bins.
# Reduced chi-squared =          1.299 for     55 degrees of freedom 
# Reduced chi-squared =          1.214 for     55 degrees of freedom 
# Reduced chi-squared =          1.209 for     55 degrees of freedom 
# Null hypothesis probability =   6.739422e-02
# Null hypothesis probability =   1.325402e-01
# Null hypothesis probability =   1.373206e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.274e-06   3.096e+01
25- 50  4.819e-06   2.617e+02
50-150  3.741e-07   6.805e+03
15-150  1.047e-05   6.137e+03

Peak spectrum fit

Power-law model
Time interval is from   23.032 sec. to   24.032 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.67890     ( -0.361475   0.425018 )
Norm@50keV  : 4.61913E-03    ( -0.00149005   0.00152203 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.50 using 59 PHA bins.
# Reduced chi-squared =         0.9036 for     57 degrees of freedom 
# Null hypothesis probability =   6.805443e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.01665 ( -0.179084  0.179242 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.87822e-08 ( -1.07839e-08  1.14292e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   23.032 sec. to   24.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08569     ( -3.76468   1.38415 )
Epeak [keV] : 17.3352      (   )
Norm@50keV  : 5.96477E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.89 using 59 PHA bins.
# Reduced chi-squared =         0.8909 for     56 degrees of freedom 
# Null hypothesis probability =   7.040235e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.999152 ( -0.176157  0.177848 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.27816e-08 ( -9.7489e-09  1.34019e-08 ) ergs/cm2
 
Band function
Time interval is from   23.032 sec. to   24.032 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.90741   ( -6.94359   -4.90741 )
beta        : -3.12582    ( -1.31496   0.569707 )
Epeak [keV] : 20.2629      ( -5.7174 3.814 )
Norm@50keV   : 5226.22    ( -897.546   107830 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.63 using 59 PHA bins.
# Reduced chi-squared =         0.8843 for     55 degrees of freedom 
# Null hypothesis probability =   7.149261e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.02908 ( 5.97092  -0.181068 ) 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]    : 6.01000  (-1.04514  1.22737)
R^2/D10^2   : 3.80206  (-2.09759   4.96743)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.65 using 59 PHA bins.
# Reduced chi-squared =         0.9061 for     57 degrees of freedom 
# Null hypothesis probability =   6.753695e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.829e-08   6.345e-09
25- 50  1.831e-08   7.381e-09
50-150  1.688e-09   1.201e-09
15-150  3.829e-08   1.158e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 23.7651       (-7.6147      12.3176)
Norm        : 10.3307       (-3.47907     5.85071)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.91 using 59 PHA bins.
# Reduced chi-squared =         0.8757 for     57 degrees of freedom 
# Null hypothesis probability =   7.357440e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.829e-08   4.055e-09
25- 50  1.813e-08   5.375e-09
50-150  7.150e-09   4.729e-09
15-150  4.357e-08   1.227e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.14990        (-5.15188      1.52221)
R1^2/D10^2  : 6.57423        (-6.56322      122.659)
kT2 [keV]   : 17.6928        (-17.7338      -17.7338)
R2^2/D10^2  : 1.53619E-02    (-0.0152192   4.15367)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.97 using 59 PHA bins.
# Reduced chi-squared =         0.8904 for     55 degrees of freedom 
# Null hypothesis probability =   7.029705e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.894e-08   1.073e-08
25- 50  1.703e-08   9.265e-09
50-150  1.059e-08   6.715e-09
15-150  4.655e-08   2.381e-08
Plot creation:
Sat Nov 15 06:42:13 EST 2014