batgrbproduct analysis for trigger=106709

batgrbproduct Analysis for Trigger=106709

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Jan 22 22:52:16 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger106709
======================================================================

  Trigger: 00106709      Segment: 000

  BAT Trigger Time: 130820945.472   [s; MET]
      Trigger Stop: 130820953.664   [s; MET]
               UTC: 2005-02-23T03:09:06.068200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 271.381776797387   Dec: -62.4986306585262  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9
     Image Trigger?:     NO
     Rate S/N Ratio:     11.2694276695846  [ if not an image trigger ]
     Image S/N Ratio:    9

  Flight Position:   [ source = BAT ]
    RA: 271.381776797387   Dec: -62.4986306585262  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 271.391844676342   Dec: -62.4682880763819  [deg; J2000]  
        { 18h 05m 34.0s , -62d 28' 05.8" }
         +/- 1.526275696313 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.41376340069525 [arcmin] (formal 1-sigma fit error)
    SNR: 16.6259143505157
 
  Angular difference between Flight and Ground position is 1.841822 arcmin
 
  Partial Coding Fraction: 0.65625    [ including projection effects ]

  Duration
     T90: 22.6800000071526 +/- 4.48138550679673
        Measured from: -7.90800000727177
                   to: 14.7719999998808     [s; relative to TRIGTIME]
     T50: 10.5999999940395 +/- 2.15224254049003
        Measured from: -0.563999995589256
                   to: 10.0359999984503     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.64399999380112     
                   to: 2.64399999380112     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -12.0080000013113     
                   to: 16.5680000036955     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.347982   0.435996   0.257790   0.053473
           0.031541   0.033076   0.029132   0.026920 [error]
 Peak      0.023798   0.024705   0.025496   0.015666
           0.005980   0.006243   0.005630   0.005003 [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 1.21e-07 1.84e-07 2.08e-07 4.50e-07 6.48e-07 9.63e-07   erg/cm2
              Error 1.63e-08 1.60e-08 2.83e-08 1.25e-07 6.58e-08 1.52e-07   erg/cm2
Peak flux Power-law 2.06e-01 2.14e-01 1.57e-01 1.85e-01 6.49e-01 7.62e-01   ph/cm2/s
              Error 8.68e-02 5.43e-02 4.69e-02 1.20e-01 1.53e-01 1.81e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.16e-07 1.92e-07 2.09e-07 2.48e-07 6.27e-07 7.65e-07   erg/cm2
              Error 1.86e-08 2.13e-08 3.01e-08 1.94e-07 7.54e-08 2.74e-07   erg/cm2
Peak flux Cutoff-PL 2.12e-01 2.16e-01 1.54e-01 1.76e-01 6.51e-01 7.57e-01   ph/cm2/s
              Error 8.71e-02 5.39e-02 4.71e-02 1.64e-01 1.53e-01 1.94e-01   ph/cm2/s
 
Fluence        Band 1.14e-07 1.93e-07 2.05e-07 3.32e-07 6.27e-07 8.44e-07   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    1.818    0.160    -      -           2.46e-03 2.45e-04   49.430 57
CPL   1.460    0.693      68.1    0.0      3.87e-03 0.00e+00   48.520 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.449    0.439    -      -           5.27e-03 1.25e-03   50.080 57
CPL   1.462    0.443    9999.4    0.0      5.24e-03 6.52e-03   50.100 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: 16.832000 sec.
T50 in the 50-300 keV band: 9.920000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   28.576  -12.008   16.568
T90    22.680   -7.908   14.772
T50    10.600   -0.564   10.036
Peak    1.000    1.644    2.644

Click here for the BAT GCN circular template

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  271.3918   -62.4683   0.0116    36.1613  -177.4216         1.1137238     16.626 TRIG_00106709                 
 
Foreground time interval of the image:
-12.008  16.568 (delta_t =  28.576 [sec])
Background time interval of the image:
-129.971 -12.008 (delta_t = 117.963 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

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)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from  -12.008 sec. to   16.568 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81803     ( -0.157606   0.162698 )
Norm@50keV  : 2.46348E-03    ( -0.000247229   0.000243272 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.43 using 59 PHA bins.
# Reduced chi-squared =         0.8672 for     57 degrees of freedom 
# Null hypothesis probability =   7.516064e-01
 
Photon flux (15-150 keV)    in 28.58 sec: 0.341865 ( -0.0301175  0.0301416 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.47797e-07 ( -6.54302e-08  6.6253e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -12.008 sec. to   16.568 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46011     ( -0.729152   0.657077 )
Epeak [keV] : 68.0976      (   )
Norm@50keV  : 3.86941E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.52 using 59 PHA bins.
# Reduced chi-squared =         0.8663 for     56 degrees of freedom 
# Null hypothesis probability =   7.510155e-01
 
Photon flux (15-150 keV)    in 28.58 sec: 0.336588 ( -0.031608  0.031437 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.26722e-07 ( -7.50196e-08  7.5877e-08 ) ergs/cm2

Band function

Time interval is from  -12.008 sec. to   16.568 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.29369   ( 1.32947   1.32947 )
beta        : -2.13110    ( 2.11309   0.414259 )
Epeak [keV] : 57.1316      ( -58.7563 -58.7563 )
Norm@50keV   : 4.87455E-03    ( -0.00205918   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.27 using 59 PHA bins.
# Reduced chi-squared =         0.8777 for     55 degrees of freedom 
# Null hypothesis probability =   7.274980e-01
 
Photon flux (15-150 keV)    in 28.58 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.26894e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.6715  (-1.19671  1.33876)
R^2/D10^2   : 8.99254E-02  (-0.0299626   0.0447463)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.89 using 59 PHA bins.
# Reduced chi-squared =          1.331 for     57 degrees of freedom 
# Null hypothesis probability =   4.792118e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.384e-08   1.186e-08
25- 50  2.248e-07   2.582e-08
50-150  1.807e-07   3.518e-08
15-150  4.793e-07   5.573e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 97.1006       (-26.6238      46.6721)
Norm        : 1.51732       (-0.182345     0.217195)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.67 using 59 PHA bins.
# Reduced chi-squared =         0.8538 for     57 degrees of freedom 
# Null hypothesis probability =   7.760376e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.133e-07   1.438e-08
25- 50  1.948e-07   1.998e-08
50-150  3.104e-07   1.149e-07
15-150  6.185e-07   1.256e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.20431        (-1.70068      2.83388)
R1^2/D10^2  : 1.11288        (-0.823576      2.54554)
kT2 [keV]   : 17.9754        (-3.88108      13.2025)
R2^2/D10^2  : 1.42425E-02    (-0.0122599   0.0238119)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.92 using 59 PHA bins.
# Reduced chi-squared =         0.9259 for     55 degrees of freedom 
# Null hypothesis probability =   6.311105e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.169e-07   5.643e-08
25- 50  1.869e-07   6.095e-08
50-150  2.886e-07   1.250e-07
15-150  5.924e-07   2.211e-07

Peak spectrum fit

Power-law model

Time interval is from    1.644 sec. to    2.644 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44876     ( -0.440757   0.437747 )
Norm@50keV  : 5.26699E-03    ( -0.00125462   0.00123588 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.08 using 59 PHA bins.
# Reduced chi-squared =         0.8787 for     57 degrees of freedom 
# Null hypothesis probability =   7.299732e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.648887 ( -0.153101  0.15339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.04127e-08 ( -1.31607e-08  1.3433e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.644 sec. to    2.644 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46152     ( -0.458795   0.426471 )
Epeak [keV] : 9999.35      ( -9999.36 -9999.36 )
Norm@50keV  : 5.24390E-03    ( -0.00125458   0.011779 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.10 using 59 PHA bins.
# Reduced chi-squared =         0.8946 for     56 degrees of freedom 
# Null hypothesis probability =   6.968103e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.651103 ( -0.154955  0.151277 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.02854e-08 ( -1.30358e-08  1.32412e-08 ) ergs/cm2

Band function

Time interval is from    1.644 sec. to    2.644 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.94325   ( -4.94325   -4.94325 )
beta        : -1.54684    ( -0.555633   0.485051 )
Epeak [keV] : 24.1521      ( -24.1521 9.10394 )
Norm@50keV   : 614.910    ( -140.639   3.62234e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.50 using 59 PHA bins.
# Reduced chi-squared =         0.9000 for     55 degrees of freedom 
# Null hypothesis probability =   6.839818e-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]    : 14.7690  (-5.29243  9.83428)
R^2/D10^2   : 7.37992E-02  (-0.0584519   0.274711)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.35 using 59 PHA bins.
# Reduced chi-squared =          1.041 for     57 degrees of freedom 
# Null hypothesis probability =   3.898571e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.378e-09   1.892e-09
25- 50  1.323e-08   6.520e-09
50-150  1.950e-08   1.127e-08
15-150  3.611e-08   2.022e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-114.587      -199.363)
Norm        : 2.65481       (-0.615379     0.615378)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.85 using 59 PHA bins.
# Reduced chi-squared =         0.8921 for     57 degrees of freedom 
# Null hypothesis probability =   7.037894e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.611e-09   3.979e-09
25- 50  1.272e-08   7.475e-09
50-150  2.789e-08   1.661e-08
15-150  4.722e-08   2.826e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.65771        (-2.5211      4.017)
R1^2/D10^2  : 1.00933        (-0.833871      5.63602)
kT2 [keV]   : 43.7677        (-22.7396      -43.7677)
R2^2/D10^2  : 1.99474E-03    (-0.00183377   0.00941582)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.54 using 59 PHA bins.
# Reduced chi-squared =         0.8826 for     55 degrees of freedom 
# Null hypothesis probability =   7.181485e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.264e-09   4.372e-09
25- 50  1.167e-08   6.640e-09
50-150  3.548e-08   2.030e-08
15-150  5.441e-08   2.728e-08

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81803     ( -0.157606   0.162698 )
Norm@50keV  : 2.46348E-03    ( -0.000247229   0.000243272 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.43 using 59 PHA bins.
# Reduced chi-squared =         0.8672 for     57 degrees of freedom 
# Null hypothesis probability =   7.516064e-01
 
Photon flux (15-150 keV)    in 28.58 sec: 0.341865 ( -0.0301175  0.0301416 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.47797e-07 ( -6.54302e-08  6.6253e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46011     ( -0.729152   0.657077 )
Epeak [keV] : 68.0976      (   )
Norm@50keV  : 3.86941E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.52 using 59 PHA bins.
# Reduced chi-squared =         0.8663 for     56 degrees of freedom 
# Null hypothesis probability =   7.510155e-01
 
Photon flux (15-150 keV)    in 28.58 sec: 0.336588 ( -0.031608  0.031437 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.26722e-07 ( -7.50196e-08  7.5877e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.29369   ( 1.32947   1.32947 )
beta        : -2.13110    ( 2.11309   0.414259 )
Epeak [keV] : 57.1316      ( -58.7563 -58.7563 )
Norm@50keV   : 4.87455E-03    ( -0.00205918   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.27 using 59 PHA bins.
# Reduced chi-squared =         0.8777 for     55 degrees of freedom 
# Null hypothesis probability =   7.274980e-01
 
Photon flux (15-150 keV)    in 28.58 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.26894e-07 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 1.84e-07
S(50-100 keV) = 2.08e-07

T90 vs. Hardness ratio plot

T90                                   = 22.6800000071526 sec.
Hardness ratio (energy fluence ratio) = 1.13043

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.25293
Count Ratio (50-100 keV) / (15-25 keV) = 0.740814

Mask shadow pattern

IMX = -7.301133695814178E-01, IMY = 3.287843649521691E-02

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-129.971390 -12.008000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
264.7985 -44.4883   95.0  54.1 -171.5   0.0381   0.1    3.3	4U 1735-44                    
 91.7112 -83.0244    2.0  17.6  110.4   0.5947   5.8 ------	UNKNOWN                       
 68.8834 -58.3511    2.5  24.8   38.1   0.4985   4.6 ------	UNKNOWN                       
260.0048 -41.2546    2.7  58.3 -174.1   2.6973   4.3 ------	UNKNOWN                       
332.3273 -36.6288    3.3  41.7 -103.1   1.5466   3.5 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
-12.008000 16.568000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
264.6885 -44.5514    5.0  54.0 -171.6  -0.3749  -2.3    6.5	4U 1735-44                    
118.1093 -57.9214    1.9  39.5   78.6   1.2499   6.1 ------	UNKNOWN                       
 85.2180 -36.2060    1.9  49.4   36.5   1.4053   6.0 ------	UNKNOWN                       
271.3918 -62.4683    0.7  36.2 -177.4   1.1137  16.6 ------	UNKNOWN                       
 21.8805 -23.7051    2.3  48.4  -39.5   0.7531   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Sun May 31 17:26:52 EDT 2015