batgrbproduct analysis for trigger=848932

batgrbproduct Analysis for Trigger=848932

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Jul 21 19:53:07 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger848932/GCN5_download_cron
======================================================================

  Trigger: 00848932      Segment: 000

  BAT Trigger Time: 553818258.944   [s; MET]
      Trigger Stop: 553818259.968   [s; MET]
               UTC: 2018-07-20T22:23:57.647680    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 265.623311909688   Dec: -26.5838055962637  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.38
     Image Trigger?:     NO
     Rate S/N Ratio:     18.6010752377383  [ if not an image trigger ]
     Image S/N Ratio:    9.38

  Flight Position:   [ source = BAT ]
    RA: 265.623311909688   Dec: -26.5838055962637  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 265.654659122167   Dec: -26.6340305197687  [deg; J2000]  
        { 17h 42m 37.1s , -26d 38' 02.5" }
         +/- 1.65586677685622 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.595329287052358 [arcmin] (formal 1-sigma fit error)
    SNR: 14.7987475612246
 
  Angular difference between Flight and Ground position is 3.450944 arcmin
 
  Partial Coding Fraction: 0.984375    [ including projection effects ]

  Duration
     T90: 124.155999898911 +/- 32.6784691171636
        Measured from: -109.843999862671
                   to: 14.3120000362396     [s; relative to TRIGTIME]
     T50: 27.9199999570847 +/- 39.3117186798345
        Measured from: -23.1599998474121
                   to: 4.76000010967255     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.26800000667572     
                   to: 0.73199999332428     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -150.519999980927     
                   to: 23.3359999656677     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.978883   1.373739   1.118366   0.316535
           0.093316   0.086079   0.073563   0.064510 [error]
 Peak      0.024859   0.052482   0.047703   0.027535
           0.007509   0.007248   0.006485   0.005525 [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 2.86e-07 5.64e-07 8.63e-07 2.88e-06 2.42e-06 4.59e-06   erg/cm2
              Error 3.74e-08 4.26e-08 7.31e-08 5.59e-07 1.79e-07 6.02e-07   erg/cm2
Peak flux Power-law 2.51e-01 3.38e-01 3.35e-01 5.98e-01 1.12e+00 1.52e+00   ph/cm2/s
              Error 8.12e-02 6.49e-02 5.17e-02 2.13e-01 1.69e-01 2.38e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.88e-07 5.66e-07 8.62e-07 2.84e-06 2.41e-06 4.55e-06   erg/cm2
              Error 3.77e-08 4.21e-08 7.27e-08 8.10e-07 1.77e-07 6.71e-07   erg/cm2
Peak flux Cutoff-PL 2.54e-01 3.39e-01 3.35e-01 5.87e-01 1.12e+00 1.52e+00   ph/cm2/s
              Error 6.79e-02 6.58e-02 5.58e-02 -------- 1.70e-01 3.22e-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    1.387    0.126    -      -           1.43e-03 9.61e-05   51.030 57
CPL   1.388    0.172    9999.4    0.0      1.44e-03 3.06e-04   51.060 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.014    0.274    -      -           9.72e-03 1.43e-03   55.600 57
CPL   1.011    0.278    9999.2    0.0      9.77e-03 8.50e-03   55.600 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: 22.528000 sec.
T50 in the 50-300 keV band: 11.008000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  173.856 -150.520   23.336
T90   124.156 -109.844   14.312
T50    27.920  -23.160    4.760
Peak    1.000   -0.268    0.732

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  265.6547 -26.6340 0.0129   19.2   -2.1       3.9989    14.8  TRIG_00848932       
------------------------------------------
 
Foreground time interval of the image:
-150.520  15.257 (delta_t = 165.777 [sec])
Background time interval of the image:
-239.944 -173.664 (delta_t =  66.280 [sec])
-172.944 -150.520 (delta_t =  22.424 [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 -150.520 sec. to   23.336 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38678     ( -0.126655   0.125666 )
Norm@50keV  : 1.43462E-03    ( -9.61094e-05   9.60206e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.03 using 59 PHA bins.
# Reduced chi-squared =         0.8953 for     57 degrees of freedom 
# Null hypothesis probability =   6.972127e-01
 
Photon flux (15-150 keV)    in 173.9 sec: 0.174193 ( -0.0122464  0.0122923 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.41726e-06 ( -1.7814e-07  1.79187e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -150.520 sec. to   23.336 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38829     ( -0.221782   0.122898 )
Epeak [keV] : 9999.35      ( -9999.36 -9999.36 )
Norm@50keV  : 1.43737E-03    ( -9.6128e-05   0.00051666 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.06 using 59 PHA bins.
# Reduced chi-squared =         0.9118 for     56 degrees of freedom 
# Null hypothesis probability =   6.619653e-01
 
Photon flux (15-150 keV)    in 173.9 sec: 0.174381 ( -0.012526  0.012037 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.41443e-06 ( -1.75587e-07  1.78282e-07 ) ergs/cm2
 
Band function
Time interval is from -150.520 sec. to   23.336 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.94168   ( -4.94168   -4.94168 )
beta        : -1.44782    ( -0.142953   0.139879 )
Epeak [keV] : 24.4571      ( -8.00048 4.34178 )
Norm@50keV   : 141.902    ( -9.45177   487870 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.87 using 59 PHA bins.
# Reduced chi-squared =         0.8885 for     55 degrees of freedom 
# Null hypothesis probability =   7.066306e-01
 
Photon flux (15-150 keV)    in 173.9 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]    : 17.4088  (  )
R^2/D10^2   : 1.14980E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         124.08 using 59 PHA bins.
# Reduced chi-squared =         2.1769 for     57 degrees of freedom 
# Null hypothesis probability =   6.940222e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.226e-07   1.789e-08
25- 50  5.526e-07   6.156e-08
50-150  1.205e-06   1.522e-07
15-150  1.880e-06   1.761e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-23.9955      -200)
Norm        : 0.720940       (-0.0484278     0.0484278)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.96 using 59 PHA bins.
# Reduced chi-squared =          1.034 for     57 degrees of freedom 
# Null hypothesis probability =   4.037099e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.123e-07   2.774e-08
25- 50  6.007e-07   5.808e-08
50-150  1.317e-06   4.319e-07
15-150  2.230e-06   3.912e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.01061        (-1.05746      1.23711)
R1^2/D10^2  : 0.193671        (-0.0854128      0.161081)
kT2 [keV]   : 34.1445        (-6.45399      11.0928)
R2^2/D10^2  : 1.07489E-03    (-0.000597742   0.00101142)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.01 using 59 PHA bins.
# Reduced chi-squared =         0.8002 for     55 degrees of freedom 
# Null hypothesis probability =   8.559698e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.977e-07   6.565e-08
25- 50  5.692e-07   1.071e-07
50-150  1.635e-06   4.707e-07
15-150  2.502e-06   6.323e-07

Peak spectrum fit

Power-law model
Time interval is from   -0.268 sec. to    0.732 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.01355     ( -0.281459   0.265992 )
Norm@50keV  : 9.71504E-03    ( -0.00143336   0.00141937 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.60 using 59 PHA bins.
# Reduced chi-squared =         0.9754 for     57 degrees of freedom 
# Null hypothesis probability =   5.278246e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.11913 ( -0.168387  0.169848 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04566e-07 ( -1.61004e-08  1.62153e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.268 sec. to    0.732 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.01116     ( -0.290151   0.265376 )
Epeak [keV] : 9999.21      ( -9999.36 -9999.36 )
Norm@50keV  : 9.76906E-03    ( -0.00141792   0.0155743 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.60 using 59 PHA bins.
# Reduced chi-squared =         0.9929 for     56 degrees of freedom 
# Null hypothesis probability =   4.898626e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.12041 ( -0.172945  0.16689 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04531e-07 ( -1.66267e-08  1.6165e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.268 sec. to    0.732 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.804320   ( 0.80432   5.80426 )
beta        : -1.01355    ( 1.01355   0.281846 )
Epeak [keV] : 63.8871      ( -63.8871 -63.8871 )
Norm@50keV   : 1.63843E-02    ( -0.00806045   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.60 using 59 PHA bins.
# Reduced chi-squared =          1.011 for     55 degrees of freedom 
# Null hypothesis probability =   4.521017e-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]    : 22.4778  (-4.54698  6.43298)
R^2/D10^2   : 3.60551E-02  (-0.0193025   0.0381902)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.09 using 59 PHA bins.
# Reduced chi-squared =          1.160 for     57 degrees of freedom 
# Null hypothesis probability =   1.916608e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.338e-09   1.219e-09
25- 50  1.787e-08   4.670e-09
50-150  6.748e-08   1.918e-08
15-150  8.870e-08   2.389e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-38.7665      -200)
Norm        : 4.67416       (-0.697207     0.697207)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.10 using 59 PHA bins.
# Reduced chi-squared =          1.177 for     57 degrees of freedom 
# Null hypothesis probability =   1.693830e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.165e-08   6.630e-09
25- 50  2.240e-08   1.238e-08
50-150  4.914e-08   2.737e-08
15-150  8.319e-08   4.677e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.92685        (-3.7578      4.73299)
R1^2/D10^2  : 0.321443        (-0.224713      1.07809)
kT2 [keV]   : 52.8244        (-24.6838      -52.8233)
R2^2/D10^2  : 2.56183E-03    (-0.00245331   0.00747062)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.64 using 59 PHA bins.
# Reduced chi-squared =         0.9935 for     55 degrees of freedom 
# Null hypothesis probability =   4.882888e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.182e-09   4.214e-09
25- 50  2.130e-08   1.185e-08
50-150  7.849e-08   4.104e-08
15-150  1.070e-07   5.450e-08
Plot creation:
Sat Jul 21 19:59:30 EDT 2018