batgrbproduct analysis for trigger=287364

batgrbproduct Analysis for Trigger=287364

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): Mon Jan 20 07:39:41 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger287364
======================================================================

  Trigger: 00287364      Segment: 000

  BAT Trigger Time: 208404714.56   [s; MET]
      Trigger Stop: 208404715.584   [s; MET]
               UTC: 2007-08-10T02:11:52.414980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 189.939176238456   Dec: 10.7444551264059  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.68
     Image Trigger?:     NO
     Rate S/N Ratio:     20.7846096908265  [ if not an image trigger ]
     Image S/N Ratio:    12.68

  Flight Position:   [ source = BAT ]
    RA: 189.939176238456   Dec: 10.7444551264059  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 189.948936942719   Dec: 10.7479977043999  [deg; J2000]  
        { 12h 39m 47.7s , +10d 44' 52.8" }
         +/- 1.20068503580658 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.400345717458607 [arcmin] (formal 1-sigma fit error)
    SNR: 23.423308583952
 
  Angular difference between Flight and Ground position is 0.613378 arcmin
 
  Partial Coding Fraction: 0.5390625    [ including projection effects ]

  Duration
     T90: 9.04000002145767 +/- 2.68246155678399
        Measured from: -1.50400000810623
                   to: 7.53600001335144     [s; relative to TRIGTIME]
     T50: 3.62000000476837 +/- 0.441687673669902
        Measured from: 0.236000001430511
                   to: 3.85600000619888     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.111999988555908     
                   to: 0.888000011444092     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.30399999022484     
                   to: 10.4399999976158     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.425784   0.476947   0.231047   0.028330
           0.025128   0.026407   0.022513   0.019396 [error]
 Peak      0.063323   0.087205   0.047272   0.016409
           0.007483   0.008131   0.006866   0.005571 [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 1.56e-07 2.05e-07 1.98e-07 3.41e-07 6.72e-07 9.00e-07   erg/cm2
              Error 1.52e-08 1.35e-08 2.22e-08 7.60e-08 5.10e-08 9.97e-08   erg/cm2
Peak flux Power-law 7.57e-01 6.34e-01 3.61e-01 3.05e-01 1.89e+00 2.06e+00   ph/cm2/s
              Error 1.24e-01 6.88e-02 5.71e-02 9.31e-02 2.05e-01 2.23e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.46e-07 2.21e-07 1.92e-07 1.15e-07 6.29e-07 6.74e-07   erg/cm2
              Error 1.75e-08 1.90e-08 2.59e-08 -------- 6.08e-08 1.31e-07   erg/cm2
Peak flux Cutoff-PL 7.06e-01 6.77e-01 3.70e-01 1.56e-01 1.85e+00 1.91e+00   ph/cm2/s
              Error 1.42e-01 9.11e-02 6.30e-02 1.52e-01 2.10e-01 2.63e-01   ph/cm2/s
 
Fluence        Band 1.42e-07 2.24e-07 1.86e-07 1.97e-07 6.34e-07 7.52e-07   erg/cm2
              Error -------- 1.95e-08 1.94e-08 -------- 5.75e-08 --------   erg/cm2
Peak flux      Band 7.08e-01 6.75e-01 3.71e-01 1.62e-01 1.86e+00 1.92e+00   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    2.051    0.126    -      -           5.70e-03 4.63e-04   71.570 57
CPL   1.371    0.619      39.0   16.7      1.39e-02 1.34e-02   67.350 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.812    0.188    -      -           1.36e-02 1.66e-03   57.130 57
CPL   1.247    0.796      60.6  -23.1      2.78e-02 3.74e-02   55.500 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: 4.672000 sec.
T50 in the 50-300 keV band: 2.688000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   12.744   -2.304   10.440
T90     9.040   -1.504    7.536
T50     3.620    0.236    3.856
Peak    1.000   -0.112    0.888

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
  189.9489    10.7480   0.0082    35.5710   -39.9836         1.2111547     23.423 TRIG_00287364                 
 
Foreground time interval of the image:
 -2.304  10.440 (delta_t =  12.744 [sec])
Background time interval of the image:
-239.560  -2.304 (delta_t = 237.256 [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   -2.304 sec. to   10.440 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.05122     ( -0.123778   0.128081 )
Norm@50keV  : 5.70256E-03    ( -0.000466089   0.000459432 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.57 using 59 PHA bins.
# Reduced chi-squared =          1.256 for     57 degrees of freedom 
# Null hypothesis probability =   9.262713e-02
 
Photon flux (15-150 keV)    in 12.74 sec: 0.876163 ( -0.0584916  0.0585463 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.72173e-07 ( -5.07699e-08  5.13098e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -2.304 sec. to   10.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37054     ( -0.669273   0.569437 )
Epeak [keV] : 38.9929      ( -22.1548 11.3124 )
Norm@50keV  : 1.39226E-02    ( -0.00724111   0.0196344 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.35 using 59 PHA bins.
# Reduced chi-squared =          1.203 for     56 degrees of freedom 
# Null hypothesis probability =   1.424311e-01
 
Photon flux (15-150 keV)    in 12.74 sec: 0.849435 ( -0.062559  0.062443 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.29375e-07 ( -5.97939e-08  6.17673e-08 ) ergs/cm2

Band function

Time interval is from   -2.304 sec. to   10.440 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.02380   ( -0.763667   4.00756 )
beta        : -2.58401    ( 2.59707   0.48609 )
Epeak [keV] : 37.6476      ( -13.1071 8.39132 )
Norm@50keV   : 2.28350E-02    ( -0.00649819   19.7675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.98 using 59 PHA bins.
# Reduced chi-squared =          1.200 for     55 degrees of freedom 
# Null hypothesis probability =   1.474770e-01
 
Photon flux (15-150 keV)    in 12.74 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.34103e-07 ( -6.34014e-07  -5.71376e-08 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.0641  (-0.732153  0.786324)
R^2/D10^2   : 0.390999  (-0.0994948   0.133772)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         100.51 using 59 PHA bins.
# Reduced chi-squared =         1.7634 for     57 degrees of freedom 
# Null hypothesis probability =   3.332900e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.030e-07   1.249e-08
25- 50  2.583e-07   1.854e-08
50-150  1.373e-07   2.551e-08
15-150  4.987e-07   3.962e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 61.9303       (-11.2962      14.9482)
Norm        : 4.49748       (-0.498788     0.533829)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.31 using 59 PHA bins.
# Reduced chi-squared =          1.181 for     57 degrees of freedom 
# Null hypothesis probability =   1.648821e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.447e-07   1.401e-08
25- 50  2.224e-07   1.503e-08
50-150  2.597e-07   4.389e-08
15-150  6.268e-07   4.867e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.14875        (-1.53163      2.90205)
R1^2/D10^2  : 3.08718        (-2.229      9.68932)
kT2 [keV]   : 15.0936        (-2.86805      18.4449)
R2^2/D10^2  : 5.99350E-02    (-0.057148   0.0957089)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.85 using 59 PHA bins.
# Reduced chi-squared =          1.288 for     55 degrees of freedom 
# Null hypothesis probability =   7.376303e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.438e-07   6.039e-08
25- 50  2.207e-07   5.750e-08
50-150  2.296e-07   8.694e-08
15-150  5.941e-07   1.745e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.112 sec. to    0.888 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81239     ( -0.184142   0.192153 )
Norm@50keV  : 1.36239E-02    ( -0.00167932   0.00164899 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.13 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     57 degrees of freedom 
# Null hypothesis probability =   4.704181e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.88643 ( -0.205147  0.205274 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.25371e-07 ( -1.55376e-08  1.57254e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.112 sec. to    0.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24746     ( -0.907711   0.684188 )
Epeak [keV] : 60.5582      ( -14.3192 -60.5585 )
Norm@50keV  : 2.78125E-02    ( -0.0151922   0.0595857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.50 using 59 PHA bins.
# Reduced chi-squared =         0.9911 for     56 degrees of freedom 
# Null hypothesis probability =   4.936807e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.85306 ( -0.2106  0.20998 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20163e-07 ( -1.7061e-08  1.7242e-08 ) ergs/cm2

Band function

Time interval is from   -0.112 sec. to    0.888 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.27741   ( -0.582604   0.774436 )
beta        : -9.37165    ( 9.37167   19.3717 )
Epeak [keV] : 61.9576      ( -19.1866 38.0566 )
Norm@50keV   : 2.66743E-02    ( -0.0111812   0.0083487 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.51 using 59 PHA bins.
# Reduced chi-squared =          1.009 for     55 degrees of freedom 
# Null hypothesis probability =   4.554987e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.85609 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.2041e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.5123  (-1.42685  1.64507)
R^2/D10^2   : 0.536083  (-0.210459   0.341506)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.00 using 59 PHA bins.
# Reduced chi-squared =          1.263 for     57 degrees of freedom 
# Null hypothesis probability =   8.714237e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.496e-08   2.590e-09
25- 50  4.479e-08   7.050e-09
50-150  3.468e-08   9.110e-09
15-150  9.443e-08   1.354e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 97.4778       (-30.2413      57.9404)
Norm        : 8.43713       (-1.20331     1.45371)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.49 using 59 PHA bins.
# Reduced chi-squared =         0.9736 for     57 degrees of freedom 
# Null hypothesis probability =   5.318154e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.205e-08   3.385e-09
25- 50  3.793e-08   4.750e-09
50-150  6.057e-08   2.619e-08
15-150  1.206e-07   2.667e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.06894        (      )
R1^2/D10^2  : 2.25163        (-1.40137      9.57099)
kT2 [keV]   : 23.0949        (-8.0179      34.7868)
R2^2/D10^2  : 2.65307E-02    (-0.0259124   0.0984414)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.18 using 59 PHA bins.
#Fit statistic : Chi-Squared =          56.29 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     55 degrees of freedom 
# Reduced chi-squared =          1.024 for     55 degrees of freedom 
# Null hypothesis probability =   3.589909e-01
# Null hypothesis probability =   4.262804e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.031e-08   1.194e-08
25- 50  3.608e-08   1.952e-08
50-150  5.132e-08   2.883e-08
15-150  1.077e-07   5.800e-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: 2.05122     ( -0.123778   0.128081 )
Norm@50keV  : 5.70256E-03    ( -0.000466089   0.000459432 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.57 using 59 PHA bins.
# Reduced chi-squared =          1.256 for     57 degrees of freedom 
# Null hypothesis probability =   9.262713e-02
 
Photon flux (15-150 keV)    in 12.74 sec: 0.876163 ( -0.0584916  0.0585463 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.72173e-07 ( -5.07699e-08  5.13098e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37054     ( -0.669273   0.569437 )
Epeak [keV] : 38.9929      ( -22.1548 11.3124 )
Norm@50keV  : 1.39226E-02    ( -0.00724111   0.0196344 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.35 using 59 PHA bins.
# Reduced chi-squared =          1.203 for     56 degrees of freedom 
# Null hypothesis probability =   1.424311e-01
 
Photon flux (15-150 keV)    in 12.74 sec: 0.849435 ( -0.062559  0.062443 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.29375e-07 ( -5.97939e-08  6.17673e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.02380   ( -0.763662   4.00757 )
beta        : -2.58401    ( 2.59707   0.48609 )
Epeak [keV] : 37.6476      ( -13.1071 8.39132 )
Norm@50keV   : 2.28350E-02    ( -0.00649819   19.7675 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.98 using 59 PHA bins.
# Reduced chi-squared =          1.200 for     55 degrees of freedom 
# Null hypothesis probability =   1.474770e-01
 
Photon flux (15-150 keV)    in 12.74 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.34103e-07 ( -6.34014e-07  -5.71376e-08 ) ergs/cm2

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

S(25-50 keV)  = 2.05e-07
S(50-100 keV) = 1.98e-07

T90 vs. Hardness ratio plot

T90                                   = 9.04000002145767 sec.
Hardness ratio (energy fluence ratio) = 0.965854

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.12016
Count Ratio (50-100 keV) / (15-25 keV) = 0.542639

Mask shadow pattern

IMX = 5.479799323756466E-01, IMY = 4.595426592837669E-01

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:
-239.560000 -2.304000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.2971 -60.4588   10.2  44.9 -173.5  -0.3748  -1.1    9.9	Cen X-3                       
186.7318 -62.7789    2.5  42.2  175.3   1.4083   4.6    2.1	GX 301-2                      
244.9808 -15.6249    0.6  39.4   71.7  16.1436  20.5    0.9	Sco X-1                       
215.1364 -13.5819    2.7  13.8   37.3   0.6957   4.3 ------	UNKNOWN                       
147.7772 -60.4902    2.8  54.3 -166.0   2.3286   4.1 ------	UNKNOWN

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

Time interval of the image:
-2.304000 10.440000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.3986 -60.5631    5.8  44.9 -173.7  -0.1226  -2.0    4.3	Cen X-3                       
186.6714 -62.7748   54.8  42.2  175.3  -0.0131  -0.2    0.5	GX 301-2                      
244.8227 -15.5003    0.0  39.3   71.4  -0.3217  -2.5   12.4	Sco X-1                       
231.9223  20.9241    2.8  51.1   18.3   0.5048   4.2 ------	UNKNOWN                       
189.9489  10.7480    0.5  35.6  -40.0   1.2111  23.4 ------	UNKNOWN                       
174.2375  -4.3244    2.7  33.7  -78.6   0.2803   4.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
71.740600 502.840600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']

Plot creation:
Sun May 31 09:24:34 EDT 2015