batgrbproduct Analysis for Trigger=661036

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Oct 23 12:51:00 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger661036/batgroup_hand_proc
======================================================================

  Trigger: 00661036      Segment: 000

  BAT Trigger Time: 467215607.424   [s; MET]
      Trigger Stop: 467215615.616   [s; MET]
               UTC: 2015-10-22T14:06:32.116140    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 349.212869430113   Dec: 55.813346849863  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.24
     Image Trigger?:     NO
     Rate S/N Ratio:     10.0995049383621  [ if not an image trigger ]
     Image S/N Ratio:    7.24

  Flight Position:   [ source = BAT ]
    RA: 349.212869430113   Dec: 55.813346849863  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 349.222878307644   Dec: 55.8120597142989  [deg; J2000]  
        { 23h 16m 53.5s , +55d 48' 43.4" }
         +/- 2.25687551119957 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.944779766888275 [arcmin] (formal 1-sigma fit error)
    SNR: 9.50840161045678
 
  Angular difference between Flight and Ground position is 0.346164 arcmin
 
  Partial Coding Fraction: 0.3515625    [ including projection effects ]

  Duration
     T90: 116.65600001812 +/- 22.960223035397
        Measured from: 2.14399999380112
                   to: 118.800000011921     [s; relative to TRIGTIME]
     T50: 67.4720000624657 +/- 23.2526739722652
        Measured from: 10.4159999489784
                   to: 77.8880000114441     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 10.3719999790192     
                   to: 11.3719999790192     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.48800003528595     
                   to: 132.847999989986     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.763850   0.744773   0.377546   0.135970
           0.106086   0.104016   0.090151   0.080456 [error]
 Peak      0.020523   0.038291   0.023331   0.015244
           0.009447   0.009514   0.007735   0.007378 [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 2.42e-07 3.33e-07 3.38e-07 6.26e-07 1.11e-06 1.54e-06   erg/cm2
              Error 5.18e-08 5.02e-08 8.91e-08 3.30e-07 2.04e-07 4.26e-07   erg/cm2
Peak flux Power-law 2.24e-01 2.46e-01 1.93e-01 2.48e-01 7.56e-01 9.11e-01   ph/cm2/s
              Error 1.24e-01 8.41e-02 6.23e-02 1.77e-01 2.29e-01 2.58e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.40e-07 3.37e-07 3.37e-07 5.01e-07 1.10e-06 1.41e-06   erg/cm2
              Error 5.49e-08 6.40e-08 9.88e-08 5.04e-07 2.34e-07 5.58e-07   erg/cm2
Peak flux Cutoff-PL 2.26e-01 2.47e-01 1.92e-01 2.44e-01 7.57e-01 9.11e-01   ph/cm2/s
              Error 1.29e-01 8.87e-02 5.11e-02 2.32e-01 2.29e-01 2.62e-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    1.976    0.291    -      -           8.99e-04 1.72e-04   55.770 57
CPL   1.869    0.903      50.5    0.0      1.04e-03 0.00e+00   55.750 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    1.353    0.524    -      -           6.27e-03 1.77e-03   56.030 57
CPL   3.174    0.279     322.5    0.0      6.93e-04 0.00e+00   55.770 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: 6.592000 sec.
T50 in the 50-300 keV band: 3.520000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  134.336   -1.488  132.848
T90   116.656    2.144  118.800
T50    67.472   10.416   77.888
Peak    1.000   10.372   11.372

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  349.2229    55.8121   0.0202    31.8343    57.1288         2.2168162      9.508 TRIG_00661036                 
 
Foreground time interval of the image:
 -1.488 132.848 (delta_t = 134.336 [sec])
Background time interval of the image:
-501.323 -484.563 (delta_t =  16.761 [sec])
-239.424  -1.488 (delta_t = 237.936 [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   -1.488 sec. to  132.848 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97593     ( -0.279742   0.302192 )
Norm@50keV  : 8.99487E-04    ( -0.000175135   0.000168842 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.77 using 59 PHA bins.
# Reduced chi-squared =         0.9784 for     57 degrees of freedom 
# Null hypothesis probability =   5.213438e-01
 
Photon flux (15-150 keV)    in 134.3 sec: 0.133451 ( -0.0200335  0.0200402 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.11274e-06 ( -2.00954e-07  2.07073e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -1.488 sec. to  132.848 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86856     ( -1.49563   0.310639 )
Epeak [keV] : 50.5328      (   )
Norm@50keV  : 1.03991E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.75 using 59 PHA bins.
# Reduced chi-squared =         0.9954 for     56 degrees of freedom 
# Null hypothesis probability =   4.844665e-01
 
Photon flux (15-150 keV)    in 134.3 sec: 0.132894 ( -0.020919  0.020463 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0991e-06 ( -2.50153e-07  2.17833e-07 ) ergs/cm2
 
Band function
Time interval is from   -1.488 sec. to  132.848 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.872006   ( 1.25955   1.25955 )
beta        : -2.11080    ( 2.15804   0.439873 )
Epeak [keV] : 25.6773      ( -28.408 388.14 )
Norm@50keV   : 0.116013    ( -0.113306   92.4741 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.25 using 59 PHA bins.
# Reduced chi-squared =          1.005 for     55 degrees of freedom 
# Null hypothesis probability =   4.649917e-01
 
Photon flux (15-150 keV)    in 134.3 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]    : 9.41871  (-1.5879  1.93449)
R^2/D10^2   : 7.73989E-02  (-0.0397547   0.0805472)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.74 using 59 PHA bins.
# Reduced chi-squared =          1.136 for     57 degrees of freedom 
# Null hypothesis probability =   2.246715e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.835e-07   4.758e-08
25- 50  4.181e-07   1.006e-07
50-150  1.830e-07   7.688e-08
15-150  7.846e-07   1.802e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 67.7968       (-26.0497      58.8582)
Norm        : 0.662342       (-0.148856     0.202185)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.22 using 59 PHA bins.
# Reduced chi-squared =         0.9863 for     57 degrees of freedom 
# Null hypothesis probability =   5.043390e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.274e-07   4.942e-08
25- 50  3.586e-07   6.903e-08
50-150  4.497e-07   2.135e-07
15-150  1.036e-06   2.824e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.34658        (-2.90135      2.16825)
R1^2/D10^2  : 0.174643        (-0.104364      0.753259)
kT2 [keV]   : 41.0221        (-27.7077      -41.7235)
R2^2/D10^2  : 2.51891E-04    (-0.000223306   0.0124273)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.37 using 59 PHA bins.
# Reduced chi-squared =          1.007 for     55 degrees of freedom 
# Null hypothesis probability =   4.605807e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.205e-07   9.891e-08
25- 50  3.697e-07   1.618e-07
50-150  5.515e-07   2.978e-07
15-150  1.142e-06   5.319e-07

Peak spectrum fit

Power-law model
Time interval is from   10.372 sec. to   11.372 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.35342     ( -0.543676   0.504777 )
Norm@50keV  : 6.26802E-03    ( -0.001767   0.00176561 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.03 using 59 PHA bins.
# Reduced chi-squared =         0.9830 for     57 degrees of freedom 
# Null hypothesis probability =   5.113681e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.755647 ( -0.228036  0.230074 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.11719e-08 ( -1.82105e-08  1.83804e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   10.372 sec. to   11.372 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.17412     ( -3.71876   -3.16056 )
Epeak [keV] : 322.457      (   )
Norm@50keV  : 6.93356E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.77 using 59 PHA bins.
# Reduced chi-squared =         0.9958 for     56 degrees of freedom 
# Null hypothesis probability =   4.837001e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.757178 ( -0.230544  0.226884 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.10764e-08 ( -1.85988e-08  1.83325e-08 ) ergs/cm2
 
Band function
Time interval is from   10.372 sec. to   11.372 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.885051   ( 0.880881   0.880881 )
beta        : -1.41336    ( 1.41771   0.606995 )
Epeak [keV] : 90.3299      ( -92.1134 -92.1134 )
Norm@50keV   : 1.18437E-02    ( -0.00722598   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.02 using 59 PHA bins.
# Reduced chi-squared =          1.019 for     55 degrees of freedom 
# Null hypothesis probability =   4.362289e-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]    : 17.5224  (-6.11955  11.8649)
R^2/D10^2   : 5.07415E-02  (-0.0501586   0.177725)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.24 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     57 degrees of freedom 
# Null hypothesis probability =   3.592708e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.145e-09   2.067e-09
25- 50  1.425e-08   8.590e-09
50-150  3.153e-08   2.054e-08
15-150  4.893e-08   2.852e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-113.396      -199.363)
Norm        : 3.17858       (-0.904504     0.90453)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.70 using 59 PHA bins.
# Reduced chi-squared =         0.9947 for     57 degrees of freedom 
# Null hypothesis probability =   4.863440e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.915e-09   4.968e-09
25- 50  1.523e-08   9.120e-09
50-150  3.339e-08   2.049e-08
15-150  5.653e-08   3.348e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.08778        (-3.45546      6.96155)
R1^2/D10^2  : 0.364901        (-0.311154      16.4403)
kT2 [keV]   : 50.7234        (-31.5059      -50.3999)
R2^2/D10^2  : 1.44985E-03    (-0.00142593   0.0313327)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.57 using 59 PHA bins.
#Fit statistic : Chi-Squared =          55.51 using 59 PHA bins.
# Reduced chi-squared =          1.010 for     55 degrees of freedom 
# Reduced chi-squared =          1.009 for     55 degrees of freedom 
# Null hypothesis probability =   4.532545e-01
# Null hypothesis probability =   4.554319e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.461e-09   4.137e-09
25- 50  1.541e-08   8.635e-09
50-150  4.087e-08   2.161e-08
15-150  6.273e-08   3.138e-08
Plot creation:
Fri Oct 23 13:01:03 EDT 2015