batgrbproduct Analysis for Trigger=675998

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Feb 26 11:44:35 EST 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger675998/GCN5_download_cron
======================================================================

  Trigger: 00675998      Segment: 000

  BAT Trigger Time: 478102872.32   [s; MET]
      Trigger Stop: 478102899.2   [s; MET]
               UTC: 2016-02-25T14:20:56.426440    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 164.2420743311   Dec: 53.6552363651881  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.62
     Image Trigger?:     NO
     Rate S/N Ratio:     10.816653826392  [ if not an image trigger ]
     Image S/N Ratio:    8.62

  Flight Position:   [ source = BAT ]
    RA: 164.2420743311   Dec: 53.6552363651881  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 164.218136612338   Dec: 53.6585158410607  [deg; J2000]  
        { 10h 56m 52.4s , +53d 39' 30.7" }
         +/- 1.89095628560679 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.860151010392037 [arcmin] (formal 1-sigma fit error)
    SNR: 12.2421898399133
 
  Angular difference between Flight and Ground position is 0.873606 arcmin
 
  Partial Coding Fraction: 0.3554688    [ including projection effects ]

  Duration
     T90: 157.408000051975 +/- 70.4733803939028
        Measured from: -23.7999998927116
                   to: 133.608000159264     [s; relative to TRIGTIME]
     T50: 37.3600000143051 +/- 10.3551154537195
        Measured from: 0.00800013542175293
                   to: 37.3680001497269     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 37.1320000290871     
                   to: 38.1320000290871     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -30.3759999871254     
                   to: 135.287999987602     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.754239   0.837243   0.721582   0.187116
           0.113804   0.117253   0.100808   0.084509 [error]
 Peak      0.040736   0.024587   0.046799   0.013976
           0.009343   0.010040   0.008322   0.006640 [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 2.40e-07 4.20e-07 5.62e-07 1.54e-06 1.64e-06 2.77e-06   erg/cm2
              Error 5.47e-08 5.91e-08 9.95e-08 5.84e-07 2.41e-07 6.61e-07   erg/cm2
Peak flux Power-law 3.06e-01 3.47e-01 2.82e-01 3.83e-01 1.08e+00 1.32e+00   ph/cm2/s
              Error 1.46e-01 9.73e-02 6.84e-02 2.17e-01 2.56e-01 2.84e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.31e-07 4.31e-07 5.73e-07 1.08e-06 1.61e-06 2.31e-06   erg/cm2
              Error 6.42e-08 7.19e-08 1.09e-07 1.08e-06 3.24e-07 9.66e-07   erg/cm2
Peak flux Cutoff-PL 3.27e-01 3.56e-01 2.77e-01 3.54e-01 1.09e+00 1.32e+00   ph/cm2/s
              Error 1.48e-01 9.85e-02 -------- -------- 2.59e-01 2.22e-01   ph/cm2/s
 
Fluence        Band 2.14e-07 4.34e-07 5.68e-07 1.26e-06 1.59e-06 2.48e-06   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    1.579    0.234    -      -           1.05e-03 1.45e-04   57.380 57
CPL   1.340    0.792     139.3    0.0      1.39e-03 2.48e-03   57.200 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.298    0.434    -      -           9.02e-03 1.95e-03   47.490 57
CPL   1.320    0.479    9999.4    0.0      9.07e-03 5.82e-03   47.510 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: 67.776000 sec.
T50 in the 50-300 keV band: 38.656000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  165.664  -30.376  135.288
T90   157.408  -23.800  133.608
T50    37.360    0.008   37.368
Peak    1.000   37.132   38.132

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  164.2181 +53.6585 0.0157   41.6   20.0       2.9732    12.2  TRIG_00675998       
------------------------------------------
 
Foreground time interval of the image:
-30.376 108.681 (delta_t = 139.057 [sec])
Background time interval of the image:
-239.320 -30.376 (delta_t = 208.944 [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  -30.376 sec. to  135.288 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.57876     ( -0.232509   0.235614 )
Norm@50keV  : 1.05299E-03    ( -0.000145087   0.000144009 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.38 using 59 PHA bins.
# Reduced chi-squared =          1.007 for     57 degrees of freedom 
# Null hypothesis probability =   4.609619e-01
 
Photon flux (15-150 keV)    in 165.7 sec: 0.134439 ( -0.0186183  0.0186913 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.63614e-06 ( -2.39649e-07  2.41723e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -30.376 sec. to  135.288 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33970     ( -1.11857   0.465581 )
Epeak [keV] : 139.283      ( -139.297 -139.297 )
Norm@50keV  : 1.39133E-03    ( -0.00139126   0.00357163 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.20 using 59 PHA bins.
# Reduced chi-squared =          1.021 for     56 degrees of freedom 
# Null hypothesis probability =   4.304723e-01
 
Photon flux (15-150 keV)    in 165.7 sec: 0.133117 ( -0.019414  0.019304 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.61214e-06 ( -2.6253e-07  3.84744e-07 ) ergs/cm2
 
Band function
Time interval is from  -30.376 sec. to  135.288 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.04008   ( 1.04093   1.04093 )
beta        : -1.84111    ( 1.82884   0.468314 )
Epeak [keV] : 82.1655      ( -85.2052 -85.2052 )
Norm@50keV   : 2.03459E-03    ( -0.000932987   0.05927 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.07 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     55 degrees of freedom 
# Null hypothesis probability =   3.982325e-01
 
Photon flux (15-150 keV)    in 165.7 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59356e-06 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.6705  (-2.17781  2.65634)
R^2/D10^2   : 1.63058E-02  (-0.0073831   0.0128197)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.71 using 59 PHA bins.
# Reduced chi-squared =          1.205 for     57 degrees of freedom 
# Null hypothesis probability =   1.376029e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.222e-07   3.140e-08
25- 50  4.754e-07   9.818e-08
50-150  6.894e-07   1.862e-07
15-150  1.287e-06   2.438e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 196.902       (-94.0356      -196.324)
Norm        : 0.547229       (-0.0738539     0.0911681)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.21 using 59 PHA bins.
# Reduced chi-squared =          1.004 for     57 degrees of freedom 
# Null hypothesis probability =   4.671515e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.262e-07   1.278e-07
25- 50  4.344e-07   2.374e-07
50-150  9.488e-07   5.213e-07
15-150  1.609e-06   8.774e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.40195        (-1.97692      8.40977)
R1^2/D10^2  : 0.729677        (-0.701765      15.5567)
kT2 [keV]   : 18.9706        (-3.996      -18.9676)
R2^2/D10^2  : 5.73719E-03    (-0.00573017   0.00832307)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.49 using 59 PHA bins.
# Reduced chi-squared =          1.063 for     55 degrees of freedom 
# Null hypothesis probability =   3.486159e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.389e-07   1.212e-07
25- 50  4.040e-07   1.726e-07
50-150  8.565e-07   3.607e-07
15-150  1.499e-06   5.420e-07

Peak spectrum fit

Power-law model
Time interval is from   37.132 sec. to   38.132 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29847     ( -0.444741   0.422685 )
Norm@50keV  : 9.02025E-03    ( -0.0019574   0.00193998 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.49 using 59 PHA bins.
# Reduced chi-squared =         0.8332 for     57 degrees of freedom 
# Null hypothesis probability =   8.111775e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.07582 ( -0.255653  0.257087 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.91698e-08 ( -2.01013e-08  2.01495e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   37.132 sec. to   38.132 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32013     ( -0.555063   0.403356 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 9.06836E-03    ( -0.00193675   0.00970998 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.51 using 59 PHA bins.
# Reduced chi-squared =         0.8485 for     56 degrees of freedom 
# Null hypothesis probability =   7.830543e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.09169 ( -0.274756  0.24317 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.90115e-08 ( -1.95595e-08  1.94495e-08 ) ergs/cm2
 
Band function
Time interval is from   37.132 sec. to   38.132 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.06021   ( 1.06018   1.06018 )
beta        : -1.29819    ( -0.37849   0.444679 )
Epeak [keV] : 31.5929      ( -31.6525 -31.6525 )
Norm@50keV   : 1.76997E-02    ( -0.0106043   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.49 using 59 PHA bins.
# Reduced chi-squared =         0.8635 for     55 degrees of freedom 
# Null hypothesis probability =   7.539897e-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]    : 23.9886  (-6.82982  11.9743)
R^2/D10^2   : 2.52608E-02  (-0.0177465   0.0509065)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.51 using 59 PHA bins.
# Reduced chi-squared =         0.9914 for     57 degrees of freedom 
# Null hypothesis probability =   4.934012e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.580e-09   1.353e-09
25- 50  1.432e-08   7.520e-09
50-150  6.141e-08   2.925e-08
15-150  7.832e-08   4.219e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-81.5148      -200)
Norm        : 4.54376       (-0.991834     0.991834)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.99 using 59 PHA bins.
# Reduced chi-squared =         0.8769 for     57 degrees of freedom 
# Null hypothesis probability =   7.333254e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.132e-08   6.955e-09
25- 50  2.178e-08   1.250e-08
50-150  4.777e-08   2.739e-08
15-150  8.087e-08   4.713e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.62306        (-1.38771      2.31839)
R1^2/D10^2  : 23.3893        (-21.2757      232.892)
kT2 [keV]   : 31.8368        (-9.88334      24.5733)
R2^2/D10^2  : 9.74334E-03    (-0.00765022   0.0215827)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.61 using 59 PHA bins.
# Reduced chi-squared =         0.7928 for     55 degrees of freedom 
# Null hypothesis probability =   8.658895e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.438e-08   8.162e-09
25- 50  1.288e-08   6.343e-09
50-150  6.563e-08   3.858e-08
15-150  9.289e-08   4.658e-08
Plot creation:
Fri Feb 26 11:53:39 EST 2016