batgrbproduct analysis for trigger=783893

batgrbproduct Analysis for Trigger=783893

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Oct 30 17:06:05 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger783893/GCN5_download_cron
======================================================================

  Trigger: 00783893      Segment: 000

  BAT Trigger Time: 530951324.544   [s; MET]
      Trigger Stop: 530951326.592   [s; MET]
               UTC: 2017-10-29T06:28:24.628960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 335.757649933822   Dec: 67.8594938723684  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.62
     Image Trigger?:     NO
     Rate S/N Ratio:     24.1246761636296  [ if not an image trigger ]
     Image S/N Ratio:    6.62

  Flight Position:   [ source = BAT ]
    RA: 335.757649933822   Dec: 67.8594938723684  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 335.732987126533   Dec: 67.8607751202439  [deg; J2000]  
        { 22h 22m 55.9s , +67d 51' 38.8" }
         +/- 3.44065059892947 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.13552454163656 [arcmin] (formal 1-sigma fit error)
    SNR: 5.20581813032153
 
  Angular difference between Flight and Ground position is 0.562952 arcmin
 
  Partial Coding Fraction: 0.9296875    [ including projection effects ]

  Duration
     T90: 2.04799997806549 +/- 
        Measured from: 0
                   to: 2.04799997806549     [s; relative to TRIGTIME]
     T50: 2.04799997806549 +/- 
        Measured from: 0
                   to: 2.04799997806549     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 2.04799997806549 second)
        Measured from: 0     
                   to: 2.04799997806549     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 2.04799997806549     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.046656   0.047317   0.001525   0.003477
           0.011677   0.011417   0.008382   0.006980 [error]
 Peak      0.046656   0.047317   0.001525   0.003477
           0.011677   0.011417   0.008382   0.006980 [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 1.16e-08 1.32e-08 1.07e-08 1.46e-08 4.08e-08 5.04e-08   erg/cm2
              Error 4.46e-09 4.74e-09 6.37e-09 1.85e-08 1.64e-08 2.65e-08   erg/cm2
Peak flux Power-law 1.86e-01 1.17e-01 4.79e-02 2.65e-02 3.64e-01 3.77e-01   ph/cm2/s
              Error 7.25e-02 4.13e-02 2.76e-02 3.15e-02 1.22e-01 1.28e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.29e-08 2.01e-08 6.76e-10 9.58e-15 3.36e-08 3.36e-08   erg/cm2
              Error 5.42e-09 8.34e-09 2.59e-09 2.63e-11 1.06e-08 1.06e-08   erg/cm2
Peak flux Cutoff-PL 1.93e-01 1.91e-01 3.76e-03 2.81e-08 3.88e-01 3.88e-01   ph/cm2/s
              Error 8.46e-02 7.21e-02 1.33e-02 7.33e-05 1.13e-01 1.13e-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    2.289    0.565    -      -           2.10e-03 9.61e-04   65.750 57
CPL  -7.205   -0.755      27.8    4.5      1.14e+04 8.97e+05   54.560 56
 
The chi2 of BB fit is 57.15 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    2.289    0.565    -      -           2.10e-03 9.61e-04   65.750 57
CPL  -7.205   -0.755      27.8    4.5      1.14e+04 8.97e+05   54.560 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    2.048    0.000    2.048
T90     2.048    0.000    2.048
T50     2.048    0.000    2.048
Peak    2.048    0.000    2.048

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  335.7330 +67.8608 0.0367   12.9 -106.2       0.1008     5.2  TRIG_00783893       
------------------------------------------
 
Foreground time interval of the image:
  0.000   2.048 (delta_t =   2.048 [sec])
Background time interval of the image:
-239.544 -12.544 (delta_t = 227.000 [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    0.000 sec. to    2.048 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.28925     ( -0.525192   0.604783 )
Norm@50keV  : 2.09726E-03    ( -0.000950421   0.000972512 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.75 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   1.997995e-01
 
Photon flux (15-150 keV)    in 2.048 sec: 0.364272 ( -0.122026  0.122398 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.08312e-08 ( -1.57193e-08  1.70822e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -7.20489     ( 7.20254   5.69319 )
Epeak [keV] : 27.8303      ( -3.89532 5.05906 )
Norm@50keV  : 1.13911E+04    ( -11280.7   1.78351e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.56 using 59 PHA bins.
# Reduced chi-squared =         0.9744 for     56 degrees of freedom 
# Null hypothesis probability =   5.293706e-01
 
Photon flux (15-150 keV)    in 2.048 sec: 0.387997 ( -0.111615  0.113422 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.36224e-08 ( -1.01849e-08  1.09933e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    2.048 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97909   ( -3.70186   -4.97909 )
beta        : -9.37163    ( 9.37163   6.4463 )
Epeak [keV] : 28.3186      ( -4.40517 4.91982 )
Norm@50keV   : 274.315    ( -76.2962   792.413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.87 using 59 PHA bins.
# Reduced chi-squared =         0.9976 for     55 degrees of freedom 
# Null hypothesis probability =   4.795503e-01
 
Photon flux (15-150 keV)    in 2.048 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]    : 7.21311  (-1.44926  1.81294)
R^2/D10^2   : 0.750251  (-0.463604   1.11973)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.15 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     57 degrees of freedom 
# Null hypothesis probability =   4.695421e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.323e-08   7.978e-09
25- 50  1.920e-08   1.111e-08
50-150  3.541e-09   2.897e-09
15-150  3.597e-08   2.176e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 31.6593       (-13.3489      34.3742)
Norm        : 2.98777       (-1.34659     2.25817)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.70 using 59 PHA bins.
# Reduced chi-squared =          1.100 for     57 degrees of freedom 
# Null hypothesis probability =   2.813174e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.279e-08   6.978e-09
25- 50  1.504e-08   9.123e-09
50-150  8.831e-09   7.573e-09
15-150  3.666e-08   2.064e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 1.20685E-05        (-1.20259e-05      -1.20259e-05)
kT2 [keV]   : 7.12392        (-1.47389      1.78896)
R2^2/D10^2  : 0.776909    (-0.479139   1.2187)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.15 using 59 PHA bins.
#Fit statistic : Chi-Squared =          56.85 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     55 degrees of freedom 
# Reduced chi-squared =          1.034 for     55 degrees of freedom 
# Null hypothesis probability =   3.952314e-01
# Null hypothesis probability =   4.060568e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.324e-08   6.484e-01
25- 50  1.919e-08   5.694e+00
50-150  3.535e-09   1.560e+02
15-150  3.597e-08   1.470e+02

Peak spectrum fit

Power-law model
Time interval is from    0.000 sec. to    2.048 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.28925     ( -0.525192   0.604783 )
Norm@50keV  : 2.09726E-03    ( -0.000950421   0.000972512 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.75 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     57 degrees of freedom 
# Null hypothesis probability =   1.997995e-01
 
Photon flux (15-150 keV)    in 2.048 sec: 0.364272 ( -0.122026  0.122398 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.08312e-08 ( -1.57193e-08  1.70822e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    2.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -7.20489     ( 7.20254   5.69319 )
Epeak [keV] : 27.8303      ( -3.89532 5.05906 )
Norm@50keV  : 1.13911E+04    ( -11280.7   1.78299e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.56 using 59 PHA bins.
# Reduced chi-squared =         0.9744 for     56 degrees of freedom 
# Null hypothesis probability =   5.293706e-01
 
Photon flux (15-150 keV)    in 2.048 sec: 0.387997 ( -0.111615  0.113422 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.36224e-08 ( -1.01849e-08  1.09933e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    2.048 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97909   ( -3.70553   -4.97909 )
beta        : -9.37163    ( 9.37163   6.4463 )
Epeak [keV] : 28.3186      ( -4.40517 4.91982 )
Norm@50keV   : 274.315    ( -76.2962   792.413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.87 using 59 PHA bins.
# Reduced chi-squared =         0.9976 for     55 degrees of freedom 
# Null hypothesis probability =   4.795503e-01
 
Photon flux (15-150 keV)    in 2.048 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]    : 7.21311  (-1.44926  1.81294)
R^2/D10^2   : 0.750251  (-0.463604   1.11973)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.15 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     57 degrees of freedom 
# Null hypothesis probability =   4.695421e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.323e-08   8.064e-09
25- 50  1.920e-08   1.204e-08
50-150  3.541e-09   3.088e-09
15-150  3.597e-08   2.208e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 31.6593       (-13.3489      34.3742)
Norm        : 2.98777       (-1.34659     2.25817)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.70 using 59 PHA bins.
# Reduced chi-squared =          1.100 for     57 degrees of freedom 
# Null hypothesis probability =   2.813174e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.279e-08   6.920e-09
25- 50  1.504e-08   9.296e-09
50-150  8.831e-09   7.671e-09
15-150  3.666e-08   2.254e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 1.20685E-05        (-1.20259e-05      -1.20259e-05)
kT2 [keV]   : 7.12392        (-1.47389      1.78896)
R2^2/D10^2  : 0.776909    (-0.479139   1.2187)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.15 using 59 PHA bins.
#Fit statistic : Chi-Squared =          56.85 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     55 degrees of freedom 
# Reduced chi-squared =          1.034 for     55 degrees of freedom 
# Null hypothesis probability =   3.952314e-01
# Null hypothesis probability =   4.060568e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.324e-08   6.969e-01
25- 50  1.919e-08   5.760e+00
50-150  3.535e-09   1.513e+02
15-150  3.597e-08   1.467e+02
Plot creation:
Mon Oct 30 17:12:57 EDT 2017