batgrbproduct analysis for trigger=883818

batgrbproduct Analysis for Trigger=883818

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Jan 15 10:36:46 EST 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger883818/batgroup_hand_proc
======================================================================

  Trigger: 00883818      Segment: 000

  BAT Trigger Time: 569187094.336   [s; MET]
      Trigger Stop: 569187110.72   [s; MET]
               UTC: 2019-01-14T19:31:12.086340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 174.882937593776   Dec: 18.8766590141854  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.12
     Image Trigger?:     NO
     Rate S/N Ratio:     9.48683298050514  [ if not an image trigger ]
     Image S/N Ratio:    7.12

  Flight Position:   [ source = BAT ]
    RA: 174.882937593776   Dec: 18.8766590141854  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 174.867924180737   Dec: 18.8815145168024  [deg; J2000]  
        { 11h 39m 28.3s , +18d 52' 53.5" }
         +/- 2.29215061472112 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.20730014153505 [arcmin] (formal 1-sigma fit error)
    SNR: 9.3000504991092
 
  Angular difference between Flight and Ground position is 0.900758 arcmin
 
  Partial Coding Fraction: 0.6328125    [ including projection effects ]

  Duration
     T90: 26.4919999837875 +/- 6.69042210499976
        Measured from: 0.167999982833862
                   to: 26.6599999666214     [s; relative to TRIGTIME]
     T50: 13.0479999780655 +/- 4.12861484108176
        Measured from: 4.44400000572205
                   to: 17.4919999837875     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.62400007247925     
                   to: 4.62400007247925     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.16399991512299     
                   to: 27.8999999761581     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.309884   0.423022   0.143154   0.045916
           0.046547   0.049057   0.044696   0.043927 [error]
 Peak      0.028981   0.013750   0.017731   0.025360
           0.008819   0.009573   0.008593   0.008429 [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 1.11e-07 1.53e-07 1.56e-07 2.88e-07 5.12e-07 7.08e-07   erg/cm2
              Error 2.27e-08 2.33e-08 4.15e-08 1.51e-07 9.59e-08 1.98e-07   erg/cm2
Peak flux Power-law 2.38e-01 1.78e-01 8.88e-02 6.31e-02 5.35e-01 5.68e-01   ph/cm2/s
              Error 1.99e-01 8.27e-02 8.35e-02 1.31e-01 2.31e-01 2.55e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.08e-07 1.66e-07 1.43e-07 7.93e-08 4.67e-07 4.97e-07   erg/cm2
              Error 2.45e-08 3.73e-08 6.48e-08 2.19e-07 1.28e-07 2.74e-07   erg/cm2
Peak flux Cutoff-PL 2.54e-01 1.75e-01 7.87e-02 4.94e-02 5.32e-01 5.56e-01   ph/cm2/s
              Error 1.99e-01 8.33e-02 -------- -------- 2.31e-01 1.82e-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    1.977    0.283    -      -           1.91e-03 3.73e-04   54.720 57
CPL   1.327    1.756      39.2    0.0      4.82e-03 0.00e+00   54.120 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    2.004    1.199    -      -           3.56e-03 2.82e-03   60.730 57
CPL   3.248    2.797     353.7    0.0      8.78e-04 0.00e+00   59.830 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   29.064   -1.164   27.900
T90    26.492    0.168   26.660
T50    13.048    4.444   17.492
Peak    1.000    3.624    4.624

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  174.8679    18.8815   0.0207    35.8443     2.3629         0.9408183      9.300 TRIG_00883818                 
 
Foreground time interval of the image:
 -1.164  27.900 (delta_t =  29.064 [sec])
Background time interval of the image:
-239.336  -1.164 (delta_t = 238.172 [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   -1.164 sec. to   27.900 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97693     ( -0.272865   0.293731 )
Norm@50keV  : 1.91405E-03    ( -0.00037894   0.000367713 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.72 using 59 PHA bins.
# Reduced chi-squared =         0.9599 for     57 degrees of freedom 
# Null hypothesis probability =   5.612851e-01
 
Photon flux (15-150 keV)    in 29.06 sec: 0.284104 ( -0.0424034  0.0424035 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.12377e-07 ( -9.41285e-08  9.76788e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.164 sec. to   27.900 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32666     ( -2.69413   0.817233 )
Epeak [keV] : 39.2459      (   )
Norm@50keV  : 4.81791E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.12 using 59 PHA bins.
# Reduced chi-squared =         0.9664 for     56 degrees of freedom 
# Null hypothesis probability =   5.464997e-01
 
Photon flux (15-150 keV)    in 29.06 sec: 0.277153 ( -0.046133  0.045091 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.67049e-07 ( -1.24897e-07  1.31188e-07 ) ergs/cm2
 
Band function
Time interval is from   -1.164 sec. to   27.900 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.345434   ( -0.162546   4.82824 )
beta        : -2.36941    ( 2.50093   0.630162 )
Epeak [keV] : 32.7138      ( -32.7488 18.5479 )
Norm@50keV   : 2.29633E-02    ( -0.0524258   245.875 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.32 using 59 PHA bins.
# Reduced chi-squared =         0.9512 for     55 degrees of freedom 
# Null hypothesis probability =   5.778092e-01
 
Photon flux (15-150 keV)    in 29.06 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]    : 8.83387  (-1.28067  1.54299)
R^2/D10^2   : 0.216824  (-0.101554   0.183079)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.24 using 59 PHA bins.
# Reduced chi-squared =          1.004 for     57 degrees of freedom 
# Null hypothesis probability =   4.660455e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.479e-08   2.334e-08
25- 50  1.956e-07   4.575e-08
50-150  7.047e-08   3.201e-08
15-150  3.609e-07   7.717e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 61.7582       (-22.9818      49.8641)
Norm        : 1.47487       (-0.335659     0.449011)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.06 using 59 PHA bins.
# Reduced chi-squared =         0.9485 for     57 degrees of freedom 
# Null hypothesis probability =   5.859981e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.082e-07   2.161e-08
25- 50  1.661e-07   3.140e-08
50-150  1.936e-07   8.897e-08
15-150  4.679e-07   1.209e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.66453        (-1.38522      1.68159)
R1^2/D10^2  : 0.340959        (-0.161694      0.387606)
kT2 [keV]   : 55.7694        (-51.7863      -72.5108)
R2^2/D10^2  : 2.27081E-04    (-0.000119553   0.00396642)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.80 using 59 PHA bins.
# Reduced chi-squared =         0.9055 for     55 degrees of freedom 
# Null hypothesis probability =   6.729472e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.038e-07   3.997e-08
25- 50  1.803e-07   6.637e-08
50-150  2.431e-07   1.411e-07
15-150  5.272e-07   2.061e-07

Peak spectrum fit

Power-law model
Time interval is from    3.624 sec. to    4.624 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.00433     ( -1.03696   1.3614 )
Norm@50keV  : 3.55813E-03    ( -0.00355692   0.00208544 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.73 using 59 PHA bins.
# Reduced chi-squared =          1.065 for     57 degrees of freedom 
# Null hypothesis probability =   3.431013e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.534781 ( -0.230992  0.230964 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.28101e-08 ( -1.82067e-08  2.05444e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    3.624 sec. to    4.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.24793     ( -5.21666   0.377941 )
Epeak [keV] : 353.703      (   )
Norm@50keV  : 8.77877E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.83 using 59 PHA bins.
# Reduced chi-squared =          1.068 for     56 degrees of freedom 
# Null hypothesis probability =   3.386208e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.532139 ( -0.230105  0.231592 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.18824e-08 ( -1.86565e-08  2.24822e-08 ) ergs/cm2
 
Band function
Time interval is from    3.624 sec. to    4.624 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.53708   ( 1.53878   1.53878 )
beta        : -2.00240    ( 2.00403   1.037 )
Epeak [keV] : 12.8104      ( -11.3321 -11.3321 )
Norm@50keV   : 1.06606E-02    ( -0.0109914   0.756233 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.73 using 59 PHA bins.
# Reduced chi-squared =          1.104 for     55 degrees of freedom 
# Null hypothesis probability =   2.771323e-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]    : 5.93491  (-2.24917  4.25007)
R^2/D10^2   : 1.88348  (-1.88348   13.9162)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.44 using 59 PHA bins.
# Reduced chi-squared =          1.095 for     57 degrees of freedom 
# Null hypothesis probability =   2.891786e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.676e-09   5.140e-09
25- 50  8.448e-09   6.015e-09
50-150  7.397e-10   7.375e-10
15-150  1.787e-08   1.244e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 72.7090       (-75.8231      -75.8231)
Norm        : 2.50652       (-1.29552     11.4664)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.76 using 59 PHA bins.
# Reduced chi-squared =          1.084 for     57 degrees of freedom 
# Null hypothesis probability =   3.099257e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.455e-09   4.102e-09
25- 50  1.037e-08   6.665e-09
50-150  1.370e-08   1.316e-08
15-150  3.053e-08   2.133e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.35665        (-2.18124      1.96621)
R1^2/D10^2  : 2.68260        (-2.27494      25.6449)
kT2 [keV]   : 84.8824        (-161.63      -183.027)
R2^2/D10^2  : 3.67566E-04    (-8.38342e-05   0.0102177)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.48 using 59 PHA bins.
# Reduced chi-squared =          1.045 for     55 degrees of freedom 
# Null hypothesis probability =   3.834173e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.714e-09   5.565e-09
25- 50  8.051e-09   5.115e-09
50-150  2.704e-08   1.581e-08
15-150  4.380e-08   2.373e-08
Plot creation:
Tue Jan 15 10:52:31 EST 2019