batgrbproduct analysis for trigger=855434

batgrbproduct Analysis for Trigger=855434

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Aug 24 15:05:04 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger855434/batgroup_hand_proc
======================================================================

  Trigger: 00855434      Segment: 000

  BAT Trigger Time: 556743894.464   [s; MET]
      Trigger Stop: 556743896.512   [s; MET]
               UTC: 2018-08-23T19:04:32.988300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 210.349060652558   Dec: 14.8842385340093  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.89
     Image Trigger?:     NO
     Rate S/N Ratio:     11.7473401244707  [ if not an image trigger ]
     Image S/N Ratio:    8.89

  Flight Position:   [ source = BAT ]
    RA: 210.349060652558   Dec: 14.8842385340093  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 210.358088177704   Dec: 14.90088367325  [deg; J2000]  
        { 14h 01m 25.9s , +14d 54' 03.2" }
         +/- 0.810258969368269 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.165745393539818 [arcmin] (formal 1-sigma fit error)
    SNR: 41.0823937798566
 
  Angular difference between Flight and Ground position is 1.127575 arcmin
 
  Partial Coding Fraction: 0.9296875    [ including projection effects ]

  Duration
     T90: 80.2960000038147 +/- 6.89302403001873
        Measured from: -29.2680000066757
                   to: 51.027999997139     [s; relative to TRIGTIME]
     T50: 30.8960000276566 +/- 1.70345995600386
        Measured from: -8.86000001430511
                   to: 22.0360000133514     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 18.3320000171661     
                   to: 19.3320000171661     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -37.5319999456406     
                   to: 72.0479999780655     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.468370   4.914412   3.423441   0.853641
           0.087758   0.095974   0.085352   0.081318 [error]
 Peak      0.075860   0.104922   0.086222   0.030674
           0.008910   0.009947   0.009027   0.007979 [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 1.14e-06 2.01e-06 2.70e-06 7.42e-06 7.84e-06 1.33e-05   erg/cm2
              Error 5.89e-08 5.89e-08 9.11e-08 5.74e-07 2.18e-07 6.25e-07   erg/cm2
Peak flux Power-law 7.01e-01 7.56e-01 5.80e-01 7.28e-01 2.31e+00 2.77e+00   ph/cm2/s
              Error 1.21e-01 8.12e-02 7.44e-02 1.91e-01 2.33e-01 2.92e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.08e-06 2.04e-06 2.74e-06 5.20e-06 7.68e-06 1.11e-05   erg/cm2
              Error 7.53e-08 6.54e-08 9.81e-08 1.48e-06 2.55e-07 1.50e-06   erg/cm2
Peak flux Cutoff-PL 6.55e-01 7.89e-01 5.97e-01 4.39e-01 2.27e+00 2.48e+00   ph/cm2/s
              Error 1.41e-01 7.50e-02 8.21e-02 3.30e-01 2.42e-01 4.26e-01   ph/cm2/s
 
Fluence        Band 1.02e-06 2.08e-06 2.67e-06 6.70e-06 7.66e-06 1.25e-05   erg/cm2
              Error 9.29e-08 7.60e-08 9.25e-08 8.64e-07 2.40e-07 --------   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    1.576    0.051    -      -           7.62e-03 2.00e-04   67.440 57
CPL   1.325    0.208     141.1  185.9      1.00e-02 2.26e-03   63.000 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    1.383    0.173    -      -           1.91e-02 1.96e-03   50.580 57
CPL   0.968    0.661     121.7    0.0      3.12e-02 0.00e+00   49.480 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: 44.032000 sec.
T50 in the 50-300 keV band: 23.744000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  109.580  -37.532   72.048
T90    80.296  -29.268   51.028
T50    30.896   -8.860   22.036
Peak    1.000   18.332   19.332

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  210.3581    14.9009   0.0047    25.0407   -24.3273        10.2429220     41.082 TRIG_00855434                 
 
Foreground time interval of the image:
-37.532  28.837 (delta_t =  66.369 [sec])
Background time interval of the image:
-60.464 -37.532 (delta_t =  22.932 [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  -37.532 sec. to   72.048 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.57552     ( -0.0506418   0.0507087 )
Norm@50keV  : 7.62160E-03    ( -0.000199679   0.000199599 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.44 using 59 PHA bins.
# Reduced chi-squared =          1.183 for     57 degrees of freedom 
# Null hypothesis probability =   1.622060e-01
 
Photon flux (15-150 keV)    in 109.6 sec: 0.972134 ( -0.0277969  0.0278776 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.83637e-06 ( -2.17697e-07  2.1814e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -37.532 sec. to   72.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32543     ( -0.213221   0.203208 )
Epeak [keV] : 141.076      ( -41.8047 330.06 )
Norm@50keV  : 1.00254E-02    ( -0.00195518   0.00257318 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.00 using 59 PHA bins.
# Reduced chi-squared =          1.125 for     56 degrees of freedom 
# Null hypothesis probability =   2.425398e-01
 
Photon flux (15-150 keV)    in 109.6 sec: 0.953373 ( -0.031298  0.03141 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.67531e-06 ( -2.55982e-07  2.54623e-07 ) ergs/cm2
 
Band function
Time interval is from  -37.532 sec. to   72.048 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.593823   ( -0.774586   2.74044 )
beta        : -1.67035    ( -0.104854   0.0837882 )
Epeak [keV] : 52.1507      ( -22.2263 118.116 )
Norm@50keV   : 2.92823E-02    ( -0.0199495   3.55067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.78 using 59 PHA bins.
# Reduced chi-squared =          1.087 for     55 degrees of freedom 
# Null hypothesis probability =   3.064120e-01
 
Photon flux (15-150 keV)    in 109.6 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.66188e-06 ( -7.66112e-06  -2.39783e-07 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.2382  (  )
R^2/D10^2   : 9.80391E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         334.37 using 59 PHA bins.
# Reduced chi-squared =         5.8661 for     57 degrees of freedom 
# Null hypothesis probability =   7.066405e-41
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.210e-07   2.663e-08
25- 50  2.100e-06   7.617e-08
50-150  3.342e-06   1.617e-07
15-150  5.963e-06   1.726e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-27.7543      -200)
Norm        : 3.90757       (-0.101609     0.101609)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.01 using 59 PHA bins.
# Reduced chi-squared =          1.105 for     57 degrees of freedom 
# Null hypothesis probability =   2.722298e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.067e-06   3.025e-08
25- 50  2.053e-06   5.809e-08
50-150  4.501e-06   1.288e-07
15-150  7.621e-06   2.208e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.83093        (-0.775339      0.818098)
R1^2/D10^2  : 0.690488        (-0.186444      0.284288)
kT2 [keV]   : 28.3182        (-3.20974      4.51499)
R2^2/D10^2  : 8.48448E-03    (-0.00342603   0.00471466)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.25 using 59 PHA bins.
# Reduced chi-squared =          1.223 for     55 degrees of freedom 
# Null hypothesis probability =   1.242720e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.464e-07   8.719e-08
25- 50  2.119e-06   1.266e-07
50-150  4.543e-06   4.362e-07
15-150  7.609e-06   5.502e-07

Peak spectrum fit

Power-law model
Time interval is from   18.332 sec. to   19.332 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38251     ( -0.173055   0.173647 )
Norm@50keV  : 1.90590E-02    ( -0.00196035   0.00195085 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.58 using 59 PHA bins.
# Reduced chi-squared =         0.8875 for     57 degrees of freedom 
# Null hypothesis probability =   7.128979e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.31198 ( -0.23323  0.233397 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.84832e-07 ( -2.13718e-08  2.16414e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   18.332 sec. to   19.332 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.967921     ( -0.779941   0.541339 )
Epeak [keV] : 121.705      (   )
Norm@50keV  : 3.12299E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.48 using 59 PHA bins.
# Reduced chi-squared =         0.8836 for     56 degrees of freedom 
# Null hypothesis probability =   7.183434e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.27286 ( -0.24236  0.24171 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.78126e-07 ( -2.423e-08  2.424e-08 ) ergs/cm2
 
Band function
Time interval is from   18.332 sec. to   19.332 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97108   ( -4.97108   -4.97108 )
beta        : -1.46042    ( -0.20357   0.194169 )
Epeak [keV] : 24.5484      ( -24.5484 6.55293 )
Norm@50keV   : 1961.09    ( -195.244   7.17816e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.88 using 59 PHA bins.
# Reduced chi-squared =         0.8888 for     55 degrees of freedom 
# Null hypothesis probability =   7.060914e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.79722e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 15.1918  (-1.8805  2.22126)
R^2/D10^2   : 0.256984  (-0.0966654   0.149312)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.61 using 59 PHA bins.
# Reduced chi-squared =          1.186 for     57 degrees of freedom 
# Null hypothesis probability =   1.588133e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.239e-08   2.286e-09
25- 50  4.981e-08   6.760e-09
50-150  7.867e-08   1.666e-08
15-150  1.409e-07   1.865e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-47.5033      -200)
Norm        : 9.44959       (-0.950565     0.950565)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.89 using 59 PHA bins.
# Reduced chi-squared =         0.9103 for     57 degrees of freedom 
# Null hypothesis probability =   6.666741e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.364e-08   1.019e-08
25- 50  4.548e-08   2.050e-08
50-150  9.974e-08   5.135e-08
15-150  1.689e-07   9.130e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.64656        (-2.62541      3.28388)
R1^2/D10^2  : 1.64418        (-1.04512      4.80207)
kT2 [keV]   : 27.6063        (-8.15399      36.4425)
R2^2/D10^2  : 2.58167E-02    (-0.0237013   0.068286)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.23 using 59 PHA bins.
# Reduced chi-squared =         0.8951 for     55 degrees of freedom 
# Null hypothesis probability =   6.937109e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.001e-08   1.028e-08
25- 50  4.635e-08   2.194e-08
50-150  1.127e-07   6.054e-08
15-150  1.790e-07   8.438e-08
Plot creation:
Fri Aug 24 15:12:26 EDT 2018