batgrbproduct Analysis for Trigger=718766

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Oct 23 17:48:43 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger718766/GCN5_download_cron
======================================================================

  Trigger: 00718766      Segment: 000

  BAT Trigger Time: 498861952   [s; MET]
      Trigger Stop: 498862712   [s; MET]
               UTC: 2016-10-22T20:45:34.952900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 256.004814298341   Dec: -37.8528428428997  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    17.25
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    17.25

  Flight Position:   [ source = BAT ]
    RA: 256.004814298341   Dec: -37.8528428428997  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 255.981423432556   Dec: -37.835775615812  [deg; J2000]  
        { 17h 03m 55.5s , -37d 50' 08.8" }
         +/- 1.87273896110848 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.887053801335101 [arcmin] (formal 1-sigma fit error)
    SNR: 12.4126689197718
 
  Angular difference between Flight and Ground position is 1.508949 arcmin
 
  Partial Coding Fraction: 0.9609375    [ including projection effects ]

  Duration
     T90: 760 +/- 
        Measured from: 0
                   to: 760     [s; relative to TRIGTIME]
     T50: 760 +/- 
        Measured from: 0
                   to: 760     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 760 second)
        Measured from: 0     
                   to: 760     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 760     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     5.182582   3.724145   0.529824  -0.280577
           0.188984   0.166464   0.141490   0.129508 [error]
 Peak      5.182582   3.724145   0.529824  -0.280577
           0.188984   0.166464   0.141490   0.129508 [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 1.81e-06 1.38e-06 7.02e-07 5.13e-07 4.13e-06 4.40e-06   erg/cm2
              Error 1.43e-07 9.27e-08 1.03e-07 1.40e-07 2.60e-07 3.15e-07   erg/cm2
Peak flux Power-law 7.94e-02 3.40e-02 8.65e-03 2.70e-03 1.24e-01 1.25e-01   ph/cm2/s
              Error 6.43e-03 2.20e-03 1.23e-03 6.95e-04 7.53e-03 7.51e-03   ph/cm2/s
 
Fluence   Cutoff-PL 1.63e-06 1.54e-06 4.00e-07 1.80e-08 3.59e-06 3.59e-06   erg/cm2
              Error 1.64e-07 1.17e-07 1.42e-07 3.41e-08 2.77e-07 2.79e-07   erg/cm2
Peak flux Cutoff-PL 7.02e-02 3.83e-02 5.32e-03 1.30e-04 1.14e-01 1.14e-01   ph/cm2/s
              Error 7.51e-03 2.83e-03 1.73e-03 2.32e-04 8.30e-03 8.31e-03   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    2.974    0.147    -      -           4.58e-04 4.90e-05   67.870 57
CPL   0.896    1.011      17.3    8.6      1.04e-02 2.91e-02   48.670 56
 
The chi2 of BB fit is 61.02 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    2.974    0.147    -      -           4.58e-04 4.90e-05   67.870 57
CPL   0.896    1.011      17.3    8.6      1.04e-02 2.91e-02   48.670 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  760.000    0.000  760.000
T90   760.000    0.000  760.000
T50   760.000    0.000  760.000
Peak  760.000    0.000  760.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  255.9814 -37.8358 0.0154   22.3 -158.7       9.0131    12.4  TRIG_00718766       
------------------------------------------
 
Foreground time interval of the image:
  0.000 414.780 (delta_t = 414.780 [sec])
416.000 760.000 (delta_t = 344.000 [sec])
Background time interval of the image:

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
Multiple GTIs in the spectrum
tstart tstop
0.000000 414.780000
416.000000 760.000000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.97410     ( -0.144265   0.150385 )
Norm@50keV  : 4.58109E-04    ( -4.87297e-05   4.93283e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.87 using 59 PHA bins.
# Reduced chi-squared =          1.191 for     57 degrees of freedom 
# Null hypothesis probability =   1.536475e-01
 
Photon flux (15-150 keV)    in 758.8 sec: 0.123638 ( -0.00751328  0.00753719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.12761e-06 ( -2.5906e-07  2.61685e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
0.000000 414.780000
416.000000 760.000000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.896239     ( -1.11313   0.90976 )
Epeak [keV] : 17.3009      ( -11.8761 5.31424 )
Norm@50keV  : 1.04352E-02    ( -0.0105591   0.0475476 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.67 using 59 PHA bins.
# Reduced chi-squared =         0.8692 for     56 degrees of freedom 
# Null hypothesis probability =   7.457627e-01
 
Photon flux (15-150 keV)    in 758.8 sec: 0.113899 ( -0.008278  0.008326 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.5928e-06 ( -2.68228e-07  2.85468e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
0.000000 414.780000
416.000000 760.000000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.904386   ( -0.898308   1.95834 )
beta        : -9.37167    ( 9.37167   19.3694 )
Epeak [keV] : 17.2615      ( -8.8948 5.24276 )
Norm@50keV   : 1.02831E-02    ( -0.0102843   0.267605 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.67 using 59 PHA bins.
# Reduced chi-squared =         0.8850 for     55 degrees of freedom 
# Null hypothesis probability =   7.134969e-01
 
Photon flux (15-150 keV)    in 758.8 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]    : 6.34847  (-0.373641  0.39653)
R^2/D10^2   : 0.325723  (-0.0800373   0.107336)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.02 using 59 PHA bins.
# Reduced chi-squared =          1.071 for     57 degrees of freedom 
# Null hypothesis probability =   3.334228e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.429e-06   1.377e-07
25- 50  1.608e-06   1.351e-07
50-150  1.845e-07   4.564e-08
15-150  3.221e-06   1.999e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 20.8873       (-2.36404      2.76477)
Norm        : 1.37357       (-0.207457     0.251309)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.36 using 59 PHA bins.
# Reduced chi-squared =         0.8659 for     57 degrees of freedom 
# Null hypothesis probability =   7.541345e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.676e-06   1.457e-07
25- 50  1.516e-06   1.070e-07
50-150  4.881e-07   1.203e-07
15-150  3.680e-06   2.413e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.40435        (-2.14162      1.22716)
R1^2/D10^2  : 1.08321        (-0.60963      23.0992)
kT2 [keV]   : 9.25690        (-2.34005      5.39013)
R2^2/D10^2  : 3.45188E-02    (-0.0320464   0.163284)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.01 using 59 PHA bins.
# Reduced chi-squared =         0.8912 for     55 degrees of freedom 
# Null hypothesis probability =   7.015029e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.613e-06   7.998e-07
25- 50  1.535e-06   7.770e-07
50-150  4.204e-07   2.389e-07
15-150  3.568e-06   1.778e-06

Peak spectrum fit

Power-law model
Time interval is from  416.000 sec. to  760.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.97410     ( -0.144265   0.150385 )
Norm@50keV  : 4.58109E-04    ( -4.87297e-05   4.93283e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.87 using 59 PHA bins.
# Reduced chi-squared =          1.191 for     57 degrees of freedom 
# Null hypothesis probability =   1.536475e-01
 
Photon flux (15-150 keV)    in 758.8 sec: 0.123638 ( -0.00751328  0.00753719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.12761e-06 ( -2.5906e-07  2.61685e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  416.000 sec. to  760.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.896239     ( -1.11313   0.90976 )
Epeak [keV] : 17.3009      ( -11.8761 5.31424 )
Norm@50keV  : 1.04352E-02    ( -0.0105591   0.0475476 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.67 using 59 PHA bins.
# Reduced chi-squared =         0.8692 for     56 degrees of freedom 
# Null hypothesis probability =   7.457627e-01
 
Photon flux (15-150 keV)    in 758.8 sec: 0.113899 ( -0.008278  0.008326 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.5928e-06 ( -2.68228e-07  2.85468e-07 ) ergs/cm2
 
Band function
Time interval is from  416.000 sec. to  760.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.904386   ( -0.898308   1.95834 )
beta        : -9.37167    ( 9.37167   19.3694 )
Epeak [keV] : 17.2615      ( -8.93926 5.24272 )
Norm@50keV   : 1.02831E-02    ( -0.0102843   0.269164 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.67 using 59 PHA bins.
# Reduced chi-squared =         0.8850 for     55 degrees of freedom 
# Null hypothesis probability =   7.134969e-01
 
Photon flux (15-150 keV)    in 758.8 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]    : 6.34847  (-0.373641  0.39653)
R^2/D10^2   : 0.325723  (-0.0800373   0.107336)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.02 using 59 PHA bins.
# Reduced chi-squared =          1.071 for     57 degrees of freedom 
# Null hypothesis probability =   3.334228e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.429e-06   1.525e-07
25- 50  1.608e-06   1.218e-07
50-150  1.845e-07   4.534e-08
15-150  3.221e-06   2.041e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 20.8873       (-2.36404      2.76477)
Norm        : 1.37357       (-0.207457     0.251309)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.36 using 59 PHA bins.
# Reduced chi-squared =         0.8659 for     57 degrees of freedom 
# Null hypothesis probability =   7.541345e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.676e-06   1.351e-07
25- 50  1.516e-06   1.256e-07
50-150  4.881e-07   1.079e-07
15-150  3.680e-06   2.421e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.40435        (-2.14162      1.22716)
R1^2/D10^2  : 1.08321        (-0.60963      23.0992)
kT2 [keV]   : 9.25690        (-2.34005      5.39013)
R2^2/D10^2  : 3.45188E-02    (-0.0320464   0.163284)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.01 using 59 PHA bins.
# Reduced chi-squared =         0.8912 for     55 degrees of freedom 
# Null hypothesis probability =   7.015029e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.613e-06   8.404e-07
25- 50  1.535e-06   7.785e-07
50-150  4.204e-07   2.488e-07
15-150  3.568e-06   1.787e-06
Plot creation:
Sun Oct 23 17:54:52 EDT 2016