batgrbproduct Analysis for Trigger=649157

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jul 20 01:17:07 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger649157/batgroup_hand_proc
======================================================================

  Trigger: 00649157      Segment: 000

  BAT Trigger Time: 458723217.92   [s; MET]
      Trigger Stop: 458723218.944   [s; MET]
               UTC: 2015-07-16T07:06:43.060080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 278.46659588295   Dec: -13.0170497349609  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.13
     Image Trigger?:     NO
     Rate S/N Ratio:     13.490737563232  [ if not an image trigger ]
     Image S/N Ratio:    7.13

  Flight Position:   [ source = BAT ]
    RA: 278.46659588295   Dec: -13.0170497349609  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 278.485802755859   Dec: -12.9723920786732  [deg; J2000]  
        { 18h 33m 56.6s , -12d 58' 20.6" }
         +/- 1.00680324593333 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.332699458272803 [arcmin] (formal 1-sigma fit error)
    SNR: 30.123941704981
 
  Angular difference between Flight and Ground position is 2.905238 arcmin
 
  Partial Coding Fraction: 0.9140625    [ including projection effects ]

  Duration
     T90: 48.12399995327 +/- 14.2515149750185
        Measured from: -2.31999999284744
                   to: 45.8039999604225     [s; relative to TRIGTIME]
     T50: 19.4959999322891 +/- 2.57047853598234
        Measured from: 4.16799998283386
                   to: 23.663999915123     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 6.18000000715256     
                   to: 7.18000000715256     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4.19200003147125     
                   to: 61.7919999957085     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.722285   0.985535   0.677848   0.083635
           0.051341   0.047081   0.040087   0.034323 [error]
 Peak      0.030656   0.050040   0.023103   0.001696
           0.006520   0.006213   0.005238   0.004218 [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 2.18e-07 3.78e-07 5.01e-07 1.35e-06 1.46e-06 2.45e-06   erg/cm2
              Error 2.17e-08 2.25e-08 3.92e-08 2.29e-07 9.30e-08 2.59e-07   erg/cm2
Peak flux Power-law 3.27e-01 2.83e-01 1.68e-01 1.50e-01 8.43e-01 9.28e-01   ph/cm2/s
              Error 8.04e-02 4.77e-02 4.01e-02 6.82e-02 1.42e-01 1.58e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.03e-07 3.94e-07 5.10e-07 7.18e-07 1.41e-06 1.83e-06   erg/cm2
              Error 2.61e-08 2.70e-08 4.21e-08 4.47e-07 1.06e-07 4.57e-07   erg/cm2
Peak flux Cutoff-PL 2.51e-01 3.50e-01 1.67e-01 1.91e-02 7.85e-01 7.87e-01   ph/cm2/s
              Error 9.61e-02 6.96e-02 5.44e-02 3.85e-02 1.46e-01 1.49e-01   ph/cm2/s
 
Fluence        Band 2.01e-07 3.92e-07 5.10e-07 7.43e-07 1.41e-06 1.85e-06   erg/cm2
              Error 2.56e-08 -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 2.56e-01 3.46e-01 1.69e-01 2.02e-02 7.91e-01 7.93e-01   ph/cm2/s
              Error -------- -------- -------- -------- 1.45e-01 --------   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.595    0.105    -      -           2.37e-03 1.39e-04   50.580 57
CPL   1.166    0.431      95.9  288.7      3.90e-03 2.04e-03   47.360 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    1.754    0.279    -      -           6.22e-03 1.17e-03   54.030 57
CPL  -0.415    1.939      48.3   14.5      9.99e-02 1.06e+00   47.340 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: 29.440000 sec.
T50 in the 50-300 keV band: 12.800000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   65.984   -4.192   61.792
T90    48.124   -2.320   45.804
T50    19.496    4.168   23.664
Peak    1.000    6.180    7.180

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  278.4858   -12.9724   0.0064    13.0796    56.1988         1.4772501     30.124 TRIG_00649157                 
 
Foreground time interval of the image:
 -4.192  13.381 (delta_t =  17.573 [sec])
Background time interval of the image:
-239.920  -4.192 (delta_t = 235.728 [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   -4.192 sec. to   61.792 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59533     ( -0.104224   0.105045 )
Norm@50keV  : 2.36873E-03    ( -0.00013959   0.000139024 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.58 using 59 PHA bins.
# Reduced chi-squared =         0.8873 for     57 degrees of freedom 
# Null hypothesis probability =   7.131845e-01
 
Photon flux (15-150 keV)    in 65.98 sec: 0.303954 ( -0.0178104  0.0178453 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.46247e-06 ( -9.26933e-08  9.3334e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -4.192 sec. to   61.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.16605     ( -0.452808   0.40976 )
Epeak [keV] : 95.8587      ( -26.7551 550.679 )
Norm@50keV  : 3.90386E-03    ( -0.00144915   0.00262235 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.36 using 59 PHA bins.
# Reduced chi-squared =         0.8457 for     56 degrees of freedom 
# Null hypothesis probability =   7.877431e-01
 
Photon flux (15-150 keV)    in 65.98 sec: 0.296319 ( -0.019176  0.019184 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40882e-06 ( -1.05852e-07  1.06274e-07 ) ergs/cm2
 
Band function
Time interval is from   -4.192 sec. to   61.792 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.16100   ( -0.415189   0.416515 )
beta        : -9.37063    ( 9.37163   19.3716 )
Epeak [keV] : 96.6576      ( -21.7263 44.026 )
Norm@50keV   : 3.90258E-03    ( -0.00144971   0.00137516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.37 using 59 PHA bins.
# Reduced chi-squared =         0.8612 for     55 degrees of freedom 
# Null hypothesis probability =   7.580111e-01
 
Photon flux (15-150 keV)    in 65.98 sec: 0.297670 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40793e-06 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.3463  (-1.03207  1.12218)
R^2/D10^2   : 3.87201E-02  (-0.0091398   0.011905)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         105.38 using 59 PHA bins.
# Reduced chi-squared =         1.8488 for     57 degrees of freedom 
# Null hypothesis probability =   1.023415e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.108e-07   1.234e-08
25- 50  4.220e-07   2.887e-08
50-150  5.790e-07   6.539e-08
15-150  1.112e-06   7.885e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 177.499       (-46.5082      -176.462)
Norm        : 1.23562       (-0.0763453     0.0856518)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.52 using 59 PHA bins.
# Reduced chi-squared =         0.8337 for     57 degrees of freedom 
# Null hypothesis probability =   8.102919e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.059e-07   1.676e-08
25- 50  3.905e-07   8.026e-08
50-150  8.228e-07   3.359e-07
15-150  1.419e-06   4.213e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.46276        (-1.25974      1.46679)
R1^2/D10^2  : 0.402614        (-0.198775      0.484316)
kT2 [keV]   : 22.8226        (-3.45412      5.57344)
R2^2/D10^2  : 5.91566E-03    (-0.0033143   0.0052624)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.78 using 59 PHA bins.
# Reduced chi-squared =         0.8506 for     55 degrees of freedom 
# Null hypothesis probability =   7.769903e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.998e-07   6.196e-08
25- 50  3.898e-07   7.779e-08
50-150  8.008e-07   2.047e-07
15-150  1.390e-06   3.259e-07

Peak spectrum fit

Power-law model
Time interval is from    6.180 sec. to    7.180 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.75400     ( -0.271305   0.286035 )
Norm@50keV  : 6.22212E-03    ( -0.00117896   0.0011577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.03 using 59 PHA bins.
# Reduced chi-squared =         0.9479 for     57 degrees of freedom 
# Null hypothesis probability =   5.871744e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.842587 ( -0.141781  0.141898 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.73984e-08 ( -1.10182e-08  1.13156e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    6.180 sec. to    7.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.415481     ( -2.33885   1.5383 )
Epeak [keV] : 48.2622      ( -8.86778 20.1717 )
Norm@50keV  : 9.99075E-02    ( -0.100568   2.01083 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.34 using 59 PHA bins.
# Reduced chi-squared =         0.8453 for     56 degrees of freedom 
# Null hypothesis probability =   7.885390e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.784863 ( -0.145535  0.146889 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.88873e-08 ( -1.04942e-08  1.20858e-08 ) ergs/cm2
 
Band function
Time interval is from    6.180 sec. to    7.180 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.419444   ( -1.47582   1.90047 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 48.2396      ( -8.92402 20.1841 )
Norm@50keV   : 0.100455    ( -0.100455   2.02367 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.34 using 59 PHA bins.
# Reduced chi-squared =         0.8606 for     55 degrees of freedom 
# Null hypothesis probability =   7.591105e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.791150 ( 6.20885  -0.151869 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.92355e-08 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.7778  (-1.80892  2.21474)
R^2/D10^2   : 0.233135  (-0.111012   0.20021)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.17 using 59 PHA bins.
# Reduced chi-squared =         0.8450 for     57 degrees of freedom 
# Null hypothesis probability =   7.913079e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.828e-09   2.189e-09
25- 50  2.102e-08   4.460e-09
50-150  1.731e-08   6.612e-09
15-150  4.515e-08   1.121e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 96.8351       (-39.3159      -97)
Norm        : 3.82521       (-0.778674     0.998848)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.83 using 59 PHA bins.
# Reduced chi-squared =         0.8918 for     57 degrees of freedom 
# Null hypothesis probability =   7.043805e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.996e-09   2.497e-09
25- 50  1.717e-08   3.740e-09
50-150  2.732e-08   1.697e-08
15-150  5.449e-08   2.192e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.52599        (-8.52778      -8.52778)
R1^2/D10^2  : 0.412843        (-0.412755      -0.412755)
kT2 [keV]   : 16.6474        (-16.6516      -16.6516)
R2^2/D10^2  : 3.68582E-02    (-0.0368052   0.352684)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.30 using 59 PHA bins.
# Reduced chi-squared =         0.8601 for     55 degrees of freedom 
# Null hypothesis probability =   7.601026e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.759e-09   6.985e-09
25- 50  2.014e-08   2.173e-08
50-150  2.144e-08   2.435e-08
15-150  4.935e-08   5.195e-08
Plot creation:
Mon Jul 20 01:26:31 EDT 2015