batgrbproduct analysis for trigger=871316

batgrbproduct Analysis for Trigger=871316

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Nov 10 17:54:32 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger871316/batgroup_hand_proc
======================================================================

  Trigger: 00871316      Segment: 000

  BAT Trigger Time: 563532233.216   [s; MET]
      Trigger Stop: 563532234.24   [s; MET]
               UTC: 2018-11-10T08:43:31.319640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 302.342535673998   Dec: -36.902699253889  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.48
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8840987267251  [ if not an image trigger ]
     Image S/N Ratio:    7.48

  Flight Position:   [ source = BAT ]
    RA: 302.342535673998   Dec: -36.902699253889  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 302.330123559643   Dec: -36.8781732848984  [deg; J2000]  
        { 20h 09m 19.2s , -36d 52' 41.4" }
         +/- 1.41270866791035 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.582905752057834 [arcmin] (formal 1-sigma fit error)
    SNR: 18.56767427053
 
  Angular difference between Flight and Ground position is 1.587529 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 138.424000024796 +/- 10.9277832336458
        Measured from: -39.2680000066757
                   to: 99.1560000181198     [s; relative to TRIGTIME]
     T50: 47.1999999284744 +/- 1.64099964656047
        Measured from: 7.29200005531311
                   to: 54.4919999837875     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 25.0320000648499     
                   to: 26.0320000648499     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -109.304000020027     
                   to: 129.808000087738     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     7.698434   7.402611   3.795633   0.692785
           0.121710   0.121605   0.104181   0.092860 [error]
 Peak      0.157004   0.176677   0.100426   0.026498
           0.009986   0.010588   0.008450   0.006579 [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 2.22e-06 2.98e-06 2.95e-06 5.24e-06 9.86e-06 1.34e-05   erg/cm2
              Error 1.08e-07 7.93e-08 1.12e-07 4.46e-07 2.54e-07 5.13e-07   erg/cm2
Peak flux Power-law 1.50e+00 1.23e+00 6.80e-01 5.54e-01 3.66e+00 3.97e+00   ph/cm2/s
              Error 1.59e-01 8.41e-02 7.02e-02 1.12e-01 2.52e-01 2.71e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.17e-06 3.00e-06 2.95e-06 4.43e-06 9.75e-06 1.26e-05   erg/cm2
              Error 1.07e-07 8.49e-08 1.14e-07 1.06e-06 2.50e-07 1.21e-06   erg/cm2
Peak flux Cutoff-PL 1.43e+00 1.28e+00 6.87e-01 3.38e-01 3.60e+00 3.74e+00   ph/cm2/s
              Error 1.83e-01 1.09e-01 7.47e-02 2.20e-01 2.63e-01 3.53e-01   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    2.017    0.054    -      -           4.47e-03 1.20e-04   65.880 57
CPL   1.907    0.222      41.4   -2.4      5.06e-03 1.27e-03   65.150 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    1.853    0.125    -      -           2.60e-02 2.04e-03   33.460 57
CPL   1.476    0.500      62.2  -22.6      4.20e-02 2.96e-02   31.720 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: 119.744000 sec.
T50 in the 50-300 keV band: 36.672000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  239.112 -109.304  129.808
T90   138.424  -39.268   99.156
T50    47.200    7.292   54.492
Peak    1.000   25.032   26.032

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  302.3301   -36.8782   0.0104    11.0722   165.6238         8.1671786     18.568 TRIG_00871316                 
 
Foreground time interval of the image:
-109.304  17.685 (delta_t = 126.989 [sec])
Background time interval of the image:
-130.315 -109.304 (delta_t =  21.011 [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 -109.304 sec. to  129.808 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.01691     ( -0.0542556   0.05467 )
Norm@50keV  : 4.46586E-03    ( -0.000119892   0.000119284 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.88 using 59 PHA bins.
# Reduced chi-squared =          1.156 for     57 degrees of freedom 
# Null hypothesis probability =   1.967202e-01
 
Photon flux (15-150 keV)    in 239.1 sec: 0.675140 ( -0.0198031  0.0199367 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.85637e-06 ( -2.53556e-07  2.54149e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -109.304 sec. to  129.808 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90718     ( -0.228315   0.215866 )
Epeak [keV] : 41.4392      ( -36.5659 -41.4392 )
Norm@50keV  : 5.06242E-03    ( -0.0010724   0.00147292 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.15 using 59 PHA bins.
# Reduced chi-squared =          1.163 for     56 degrees of freedom 
# Null hypothesis probability =   1.883820e-01
 
Photon flux (15-150 keV)    in 239.1 sec: 0.667629 ( -0.024295  0.024318 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.74837e-06 ( -3.35194e-07  1.65122e-07 ) ergs/cm2
 
Band function
Time interval is from -109.304 sec. to  129.808 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.67119   ( 1.67385   3.20585 )
beta        : -2.08265    ( 2.08242   0.0983455 )
Epeak [keV] : 37.8946      ( -37.9458 35.8305 )
Norm@50keV   : 6.98989E-03    ( -0.00214838   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.17 using 59 PHA bins.
# Reduced chi-squared =          1.167 for     55 degrees of freedom 
# Null hypothesis probability =   1.860557e-01
 
Photon flux (15-150 keV)    in 239.1 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]    : 11.9422  (  )
R^2/D10^2   : 0.143130  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         380.25 using 59 PHA bins.
# Reduced chi-squared =         6.6711 for     57 degrees of freedom 
# Null hypothesis probability =   2.581595e-49
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.032e-06   5.655e-08
25- 50  3.229e-06   9.803e-08
50-150  2.760e-06   1.650e-07
15-150  7.021e-06   1.973e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 77.3742       (-6.68517      7.73514)
Norm        : 3.04014       (-0.146132     0.156147)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          81.87 using 59 PHA bins.
# Reduced chi-squared =          1.436 for     57 degrees of freedom 
# Null hypothesis probability =   1.709435e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.882e-06   7.364e-08
25- 50  3.073e-06   8.368e-08
50-150  4.240e-06   2.343e-07
15-150  9.194e-06   2.546e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.62519        (-0.653253      0.682301)
R1^2/D10^2  : 1.01584        (-0.299517      0.488447)
kT2 [keV]   : 22.6693        (-2.5382      3.46846)
R2^2/D10^2  : 9.01646E-03    (-0.00379055   0.00554216)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          87.17 using 59 PHA bins.
# Reduced chi-squared =          1.585 for     55 degrees of freedom 
# Null hypothesis probability =   3.721825e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.814e-06   1.667e-07
25- 50  3.067e-06   1.674e-07
50-150  4.445e-06   4.124e-07
15-150  9.326e-06   6.061e-07

Peak spectrum fit

Power-law model
Time interval is from   25.032 sec. to   26.032 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85331     ( -0.123128   0.1264 )
Norm@50keV  : 2.59946E-02    ( -0.00204921   0.0020228 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          33.46 using 59 PHA bins.
# Reduced chi-squared =         0.5870 for     57 degrees of freedom 
# Null hypothesis probability =   9.945790e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.65874 ( -0.252159  0.252326 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.39006e-07 ( -1.87979e-08  1.89753e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   25.032 sec. to   26.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47559     ( -0.548655   0.450878 )
Epeak [keV] : 62.1642      ( -17.0578 -62.1645 )
Norm@50keV  : 4.19900E-02    ( -0.0175627   0.0415785 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.72 using 59 PHA bins.
# Reduced chi-squared =         0.5665 for     56 degrees of freedom 
# Null hypothesis probability =   9.963369e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.60101 ( -0.2629  0.26244 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.309e-07 ( -2.1445e-08  2.163e-08 ) ergs/cm2
 
Band function
Time interval is from   25.032 sec. to   26.032 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.415634   ( -0.408517   -0.408517 )
beta        : -1.96208    ( 1.96216   0.176879 )
Epeak [keV] : 28.6482      ( -28.7008 45.1628 )
Norm@50keV   : 1.10654    ( -1.06532   2474.02 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.20 using 59 PHA bins.
# Reduced chi-squared =         0.5672 for     55 degrees of freedom 
# Null hypothesis probability =   9.959880e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.32887e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.2579  (-0.929525  1.01838)
R^2/D10^2   : 1.09581  (-0.304379   0.419422)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          78.54 using 59 PHA bins.
# Reduced chi-squared =          1.378 for     57 degrees of freedom 
# Null hypothesis probability =   3.085572e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.914e-08   3.395e-09
25- 50  8.487e-08   6.850e-09
50-150  6.183e-08   1.042e-08
15-150  1.758e-07   1.425e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 90.1932       (-19.4867      29.2946)
Norm        : 16.5493       (-1.63509     1.87299)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.99 using 59 PHA bins.
# Reduced chi-squared =         0.5612 for     57 degrees of freedom 
# Null hypothesis probability =   9.970069e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.318e-08   4.840e-09
25- 50  7.307e-08   5.615e-09
50-150  1.114e-07   3.535e-08
15-150  2.277e-07   3.945e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.09466        (-1.30344      1.49231)
R1^2/D10^2  : 7.36080        (-3.7762      10.2639)
kT2 [keV]   : 20.8667        (-4.36689      8.40663)
R2^2/D10^2  : 7.86335E-02    (-0.0562692   0.0686381)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          32.87 using 59 PHA bins.
# Reduced chi-squared =         0.5976 for     55 degrees of freedom 
# Null hypothesis probability =   9.922471e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.363e-08   1.254e-08
25- 50  7.152e-08   1.702e-08
50-150  1.114e-07   5.494e-08
15-150  2.266e-07   7.228e-08
Plot creation:
Sat Nov 10 18:01:14 EST 2018