batgrbproduct analysis for trigger=826428

batgrbproduct Analysis for Trigger=826428

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Apr 19 04:03:46 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger826428/GCN5_download_cron
======================================================================

  Trigger: 00826428      Segment: 000

  BAT Trigger Time: 545726666.816   [s; MET]
      Trigger Stop: 545726667.264   [s; MET]
               UTC: 2018-04-18T06:44:06.012000    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 64 ms to TRIGTIME + 320 ms

  BAT 
    RA: 170.112382201695   Dec: 24.9562917733818  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.81
     Image Trigger?:     NO
     Rate S/N Ratio:     22.8473193175917  [ if not an image trigger ]
     Image S/N Ratio:    8.81

  Flight Position:   [ source = BAT ]
    RA: 170.112382201695   Dec: 24.9562917733818  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 170.13164079634   Dec: 24.9246924483515  [deg; J2000]  
        { 11h 20m 31.6s , +24d 55' 28.9" }
         +/- 1.15595374053186 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.402700052988689 [arcmin] (formal 1-sigma fit error)
    SNR: 24.7288229277093
 
  Angular difference between Flight and Ground position is 2.166209 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 2.28799998760223 +/- 0.825978196121878
        Measured from: 0.272000193595886
                   to: 2.56000018119812     [s; relative to TRIGTIME]
     T50: 0.704000115394592 +/- 0.131939416102577
        Measured from: 0.464000105857849
                   to: 1.16800022125244     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.228000044822693     
                   to: 1.22800004482269     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0959999561309814     
                   to: 3.50400006771088     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.126238   0.211586   0.141833   0.049366
           0.010941   0.011941   0.010686   0.008549 [error]
 Peak      0.097270   0.154122   0.100524   0.040399
           0.006924   0.007975   0.007048   0.005316 [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 4.03e-08 7.70e-08 1.14e-07 3.62e-07 3.22e-07 5.93e-07   erg/cm2
              Error 4.54e-09 5.38e-09 1.03e-08 6.93e-08 2.50e-08 7.75e-08   erg/cm2
Peak flux Power-law 9.51e-01 9.98e-01 7.42e-01 8.90e-01 3.03e+00 3.58e+00   ph/cm2/s
              Error 1.02e-01 6.53e-02 5.80e-02 1.44e-01 1.87e-01 2.25e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.82e-08 8.06e-08 1.16e-07 1.95e-07 3.10e-07 4.30e-07   erg/cm2
              Error 5.18e-09 6.92e-09 1.10e-08 1.32e-07 2.86e-08 1.50e-07   erg/cm2
Peak flux Cutoff-PL 9.43e-01 1.00e+00 7.45e-01 8.33e-01 3.03e+00 3.52e+00   ph/cm2/s
              Error 1.13e-01 7.30e-02 6.22e-02 2.34e-01 1.91e-01 3.26e-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    1.435    0.116    -      -           9.83e-03 6.81e-04   58.890 57
CPL   1.050    0.472     118.9  -37.7      1.56e-02 9.62e-03   56.830 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.429    0.107    -      -           2.47e-02 1.54e-03   52.620 57
CPL   1.341    0.291     340.6  -54.6      2.74e-02 9.52e-03   52.730 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: 1.024000 sec.
T50 in the 50-300 keV band: 0.512000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    3.408    0.096    3.504
T90     2.288    0.272    2.560
T50     0.704    0.464    1.168
Peak    1.000    0.228    1.228

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  170.1316 +24.9247 0.0077   14.5  167.4       0.5433    24.7  TRIG_00826428       
------------------------------------------
 
Foreground time interval of the image:
  0.096   3.504 (delta_t =   3.408 [sec])
Background time interval of the image:
-238.816 -78.436 (delta_t = 160.380 [sec])
-77.816   0.096 (delta_t =  77.912 [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    0.096 sec. to    3.504 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.43521     ( -0.115752   0.116462 )
Norm@50keV  : 9.83170E-03    ( -0.000682834   0.000680143 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.89 using 59 PHA bins.
# Reduced chi-squared =          1.033 for     57 degrees of freedom 
# Null hypothesis probability =   4.062834e-01
 
Photon flux (15-150 keV)    in 3.408 sec: 1.20724 ( -0.0818739  0.0819135 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.21521e-07 ( -2.49265e-08  2.51298e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.096 sec. to    3.504 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04980     ( -0.513461   0.430367 )
Epeak [keV] : 118.869      ( -43.5241 -118.876 )
Norm@50keV  : 1.56473E-02    ( -0.0061223   0.0131142 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.83 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     56 degrees of freedom 
# Null hypothesis probability =   4.439652e-01
 
Photon flux (15-150 keV)    in 3.408 sec: 1.18855 ( -0.08478  0.0848 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.10441e-07 ( -2.87424e-08  2.84963e-08 ) ergs/cm2
 
Band function
Time interval is from    0.096 sec. to    3.504 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.84491   ( -6.73183   -4.84491 )
beta        : -1.62992    ( -0.160303   0.150746 )
Epeak [keV] : 29.1433      ( -4.07211 3.25254 )
Norm@50keV   : 314.183    ( -20.9104   678.455 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.24 using 59 PHA bins.
# Reduced chi-squared =         0.9134 for     55 degrees of freedom 
# Null hypothesis probability =   6.568519e-01
 
Photon flux (15-150 keV)    in 3.408 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]    : 14.1048  (-1.20507  1.35311)
R^2/D10^2   : 0.171756  (-0.0471216   0.0631749)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          97.90 using 59 PHA bins.
# Reduced chi-squared =          1.718 for     57 degrees of freedom 
# Null hypothesis probability =   6.133837e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.458e-08   2.977e-09
25- 50  9.210e-08   8.281e-09
50-150  1.211e-07   1.830e-08
15-150  2.378e-07   2.121e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-34.1523      -200)
Norm        : 4.94040       (-0.332371     0.332371)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.15 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     57 degrees of freedom 
# Null hypothesis probability =   3.968688e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.207e-08   3.374e-09
25- 50  8.093e-08   8.111e-09
50-150  1.775e-07   4.877e-08
15-150  3.005e-07   5.717e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.92908        (-1.5047      1.6021)
R1^2/D10^2  : 0.622735        (-0.241838      0.454127)
kT2 [keV]   : 38.7092        (-12.0695      42.583)
R2^2/D10^2  : 4.08914E-03    (-0.00344034   0.00560655)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.22 using 59 PHA bins.
# Reduced chi-squared =         0.9131 for     55 degrees of freedom 
# Null hypothesis probability =   6.573755e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.557e-08   6.625e-09
25- 50  8.750e-08   1.736e-08
50-150  1.965e-07   8.807e-08
15-150  3.196e-07   1.010e-07

Peak spectrum fit

Power-law model
Time interval is from    0.228 sec. to    1.228 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42892     ( -0.107103   0.107811 )
Norm@50keV  : 2.47339E-02    ( -0.00154061   0.00153552 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.62 using 59 PHA bins.
# Reduced chi-squared =         0.9232 for     57 degrees of freedom 
# Null hypothesis probability =   6.399372e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.03251 ( -0.186648  0.186756 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.37627e-07 ( -1.65509e-08  1.66523e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.228 sec. to    1.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.34084     ( -0.438539   0.143293 )
Epeak [keV] : 340.573      ( -656.074 -765.359 )
Norm@50keV  : 2.74254E-02    ( -0.00258473   0.0164601 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.73 using 59 PHA bins.
# Reduced chi-squared =         0.9416 for     56 degrees of freedom 
# Null hypothesis probability =   5.993625e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.02610 ( -0.19153  0.19114 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.36825e-07 ( -1.811e-08  1.7399e-08 ) ergs/cm2
 
Band function
Time interval is from    0.228 sec. to    1.228 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.736877   ( 0.725515   0.725515 )
beta        : -1.54636    ( -0.261751   0.189894 )
Epeak [keV] : 68.3619      ( -67.2508 193.151 )
Norm@50keV   : 6.40331E-02    ( -0.0665707   2.33945e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.13 using 59 PHA bins.
# Reduced chi-squared =         0.9297 for     55 degrees of freedom 
# Null hypothesis probability =   6.230814e-01
 
Photon flux (15-150 keV)    in 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]    : 14.5918  (  )
R^2/D10^2   : 0.380521  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         118.59 using 59 PHA bins.
# Reduced chi-squared =         2.0806 for     57 degrees of freedom 
# Null hypothesis probability =   3.218240e-06
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.703e-08   1.955e-09
25- 50  6.595e-08   5.130e-09
50-150  9.437e-08   1.202e-08
15-150  1.774e-07   1.395e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-25.5752      -200)
Norm        : 12.4475       (-0.755394     0.755394)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.91 using 59 PHA bins.
# Reduced chi-squared =         0.9985 for     57 degrees of freedom 
# Null hypothesis probability =   4.783454e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.099e-08   2.165e-09
25- 50  5.962e-08   5.255e-09
50-150  1.308e-07   2.555e-08
15-150  2.214e-07   3.850e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.24226        (-1.4461      1.47138)
R1^2/D10^2  : 1.40672        (-0.506065      0.943759)
kT2 [keV]   : 47.2937        (-15.6666      64.2491)
R2^2/D10^2  : 6.15954E-03    (-0.00531797   0.0143138)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.90 using 59 PHA bins.
# Reduced chi-squared =         0.9073 for     55 degrees of freedom 
# Null hypothesis probability =   6.692442e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.527e-08   4.155e-09
25- 50  6.369e-08   1.059e-08
50-150  1.511e-07   6.495e-08
15-150  2.401e-07   7.105e-08
Plot creation:
Thu Apr 19 05:30:09 EDT 2018