batgrbproduct analysis for trigger=561974

batgrbproduct Analysis for Trigger=561974

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): Sun Jan 12 00:44:31 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger561974
======================================================================

  Trigger: 00561974      Segment: 000

  BAT Trigger Time: 395663824.256   [s; MET]
      Trigger Stop: 395663824.768   [s; MET]
               UTC: 2013-07-16T10:36:53.459220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 179.547406394627   Dec: 63.0656816836336  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.64
     Image Trigger?:     NO
     Rate S/N Ratio:     27.8747197295327  [ if not an image trigger ]
     Image S/N Ratio:    7.64

  Flight Position:   [ source = BAT ]
    RA: 179.547406394627   Dec: 63.0656816836336  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 179.547   Dec: 63.0657  [deg; J2000]
        { 11h 58m 11.3s , +63d 03' 56.5" }
        +/- 2.62718612864 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.65424863938
 
 
  Angular difference between Flight and Ground position is 0.011100 arcmin
 
  Partial Coding Fraction: 0.6328125    [ including projection effects ]

  Duration
     T90: 87.6719999909401 +/- 19.9059138688552
        Measured from: 0.11599999666214
                   to: 87.7879999876022     [s; relative to TRIGTIME]
     T50: 63.0159999728203 +/- 37.071669430004
        Measured from: 2.37999999523163
                   to: 65.3959999680519     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0259999632835388     
                   to: 0.974000036716461     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0200000405311584     
                   to: 106.756000041962     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.028692   0.200758   0.184737   0.037264
           0.061939   0.063724   0.056044   0.048882 [error]
 Peak      0.029849   0.030058   0.049178   0.025473
           0.007794   0.008299   0.007794   0.007134 [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 3.59e-08 7.38e-08 1.19e-07 4.25e-07 3.29e-07 6.53e-07   erg/cm2
              Error 2.27e-08 2.95e-08 5.21e-08 4.23e-07 1.31e-07 4.58e-07   erg/cm2
Peak flux Power-law 1.99e-01 2.87e-01 3.07e-01 6.10e-01 9.82e-01 1.40e+00   ph/cm2/s
              Error 9.04e-02 7.78e-02 6.05e-02 2.83e-01 1.99e-01 2.97e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.32e-08 7.96e-08 1.39e-07 1.08e-07 3.10e-07 3.53e-07   erg/cm2
              Error 2.80e-08 4.20e-08 6.90e-08 -------- 1.32e-07 4.44e-07   erg/cm2
Peak flux Cutoff-PL 2.00e-01 2.87e-01 3.07e-01 6.03e-01 9.83e-01 1.40e+00   ph/cm2/s
              Error 1.49e-01 7.85e-02 6.86e-02 4.66e-01 1.53e-01 8.42e-01   ph/cm2/s
 
Fluence        Band 2.90e-08 7.59e-08 1.32e-07 1.29e-07 3.32e-07 3.62e-07   erg/cm2
              Error -------- -------- -------- -------- -------- 3.83e-07   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    1.317    0.639    -      -           3.13e-04 1.14e-04   41.920 57
CPL  -0.303    5.294      82.1   -6.9      1.59e-03 3.61e-01   41.010 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.903    0.371    -      -           8.56e-03 1.73e-03   62.570 57
CPL   2.135    0.000      45.6    0.0      7.16e-04 0.00e+00   62.350 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: 0.640000 sec.
T50 in the 50-300 keV band: 0.320000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  106.736    0.020  106.756
T90    87.672    0.116   87.788
T50    63.016    2.380   65.396
Peak    1.000   -0.026    0.974

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 50.0-350.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
179.547 63.066 0.000 35.583 -2.803 0.067 7.654 TRIG_00561974
 
Image time interval: 0.000 to 0.512 [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)

The mask-weighted light curves based on cleaned DPHs

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    0.020 sec. to  106.756 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31688     ( -0.633924   0.643359 )
Norm@50keV  : 3.12851E-04    ( -0.000113804   0.000113475 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.92 using 59 PHA bins.
# Reduced chi-squared =         0.7354 for     57 degrees of freedom 
# Null hypothesis probability =   9.328232e-01
 
Photon flux (15-150 keV)    in 106.7 sec: 3.74421E-02 ( -0.0138698  0.0139841 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.28531e-07 ( -1.2899e-07  1.32499e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.020 sec. to  106.756 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.303142     ( -8.12706   2.46085 )
Epeak [keV] : 82.0590      ( -68.2912 -82.0202 )
Norm@50keV  : 1.58952E-03    ( -0.00160606   0.719827 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.01 using 59 PHA bins.
# Reduced chi-squared =         0.7323 for     56 degrees of freedom 
# Null hypothesis probability =   9.335166e-01
 
Photon flux (15-150 keV)    in 106.7 sec: 3.44890E-02 ( -0.015524  0.01507 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.10253e-07 ( -1.26737e-07  1.3664e-07 ) ergs/cm2

Band function

Time interval is from    0.020 sec. to  106.756 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.308267   ( -1.14771   0.743592 )
beta        : -10.0000    ( 10   20 )
Epeak [keV] : 81.9390      ( -31.8757 245.578 )
Norm@50keV   : 1.59938E-03    ( -0.0015993   0.126415 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.01 using 59 PHA bins.
# Reduced chi-squared =         0.7457 for     55 degrees of freedom 
# Null hypothesis probability =   9.195857e-01
 
Photon flux (15-150 keV)    in 106.7 sec: 3.63401E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.32213e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 19.1249  (-6.0204  9.86197)
R^2/D10^2   : 2.05084E-03  (-0.00205084   0.00521065)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.11 using 59 PHA bins.
# Reduced chi-squared =         0.7212 for     57 degrees of freedom 
# Null hypothesis probability =   9.441549e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.569e-08   1.032e-08
25- 50  7.584e-08   4.557e-08
50-150  2.041e-07   1.354e-07
15-150  2.956e-07   1.950e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-199.363      -199.363)
Norm        : 0.156077       (-0.0567675     0.0567664)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.10 using 59 PHA bins.
# Reduced chi-squared =         0.7386 for     57 degrees of freedom 
# Null hypothesis probability =   9.299992e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.147e-08   2.685e-08
25- 50  7.977e-08   5.121e-08
50-150  1.749e-07   1.111e-07
15-150  2.962e-07   1.833e-07

Double BB

#Fit statistic : Chi-Squared =          38.54 using 59 PHA bins.
#Fit statistic : Chi-Squared =          38.49 using 59 PHA bins.
#Fit statistic : Chi-Squared =          38.48 using 59 PHA bins.
# Reduced chi-squared =         0.7062 for     55 degrees of freedom 
# Reduced chi-squared =         0.7026 for     55 degrees of freedom 
# Reduced chi-squared =         0.7006 for     55 degrees of freedom 
# Reduced chi-squared =         0.6998 for     55 degrees of freedom 
# Reduced chi-squared =         0.6996 for     55 degrees of freedom 
# Null hypothesis probability =   9.514215e-01
# Null hypothesis probability =   9.537979e-01
# Null hypothesis probability =   9.550431e-01
# Null hypothesis probability =   9.555522e-01
# Null hypothesis probability =   9.557292e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.673e-08   1.092e-08
25- 50  6.977e-08   4.345e-08
50-150  2.104e-07   1.443e-07
15-150  3.069e-07   1.962e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.026 sec. to    0.974 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.902895     ( -0.385233   0.357761 )
Norm@50keV  : 8.55758E-03    ( -0.00175572   0.00170538 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.57 using 59 PHA bins.
# Reduced chi-squared =          1.098 for     57 degrees of freedom 
# Null hypothesis probability =   2.853009e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.982245 ( -0.197919  0.199804 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.59376e-08 ( -1.92194e-08  1.93178e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.026 sec. to    0.974 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.13485     (     )
Epeak [keV] : 45.5813      (   )
Norm@50keV  : 7.16112E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.35 using 59 PHA bins.
# Reduced chi-squared =          1.113 for     56 degrees of freedom 
# Null hypothesis probability =   2.606798e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.982502 ( -0.106843  0.198738 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.59479e-08 ( -1.93804e-08  1.92871e-08 ) ergs/cm2

Band function

Time interval is from   -0.026 sec. to    0.974 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.99999   ( 9.99999   9.99999 )
beta        : -0.902889    ( -0.357411   0.384733 )
Epeak [keV] : 13.9029      ( -13.9029 -13.9029 )
Norm@50keV   : 1.16309    ( -0.238629   0.231788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.57 using 59 PHA bins.
# Reduced chi-squared =          1.138 for     55 degrees of freedom 
# Null hypothesis probability =   2.255498e-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]    : 26.0690  (-6.08299  9.88344)
R^2/D10^2   : 2.12220E-02  (-0.0129173   0.0270966)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.03 using 59 PHA bins.
# Reduced chi-squared =          1.158 for     57 degrees of freedom 
# Null hypothesis probability =   1.930464e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.449e-09   1.124e-09
25- 50  1.419e-08   6.454e-09
50-150  7.099e-08   2.999e-08
15-150  8.763e-08   3.854e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-52.027      -200)
Norm        : 4.08657       (-0.824148     0.824148)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.19 using 59 PHA bins.
# Reduced chi-squared =          1.266 for     57 degrees of freedom 
# Null hypothesis probability =   8.472384e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.018e-08   6.000e-09
25- 50  1.957e-08   1.133e-08
50-150  4.293e-08   2.475e-08
15-150  7.268e-08   4.238e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.87251        (-1.39406      2.12519)
R1^2/D10^2  : 46.7406        (-45.0137      7319.46)
kT2 [keV]   : 29.6622        (-7.40855      13.5332)
R2^2/D10^2  : 1.39408E-02    (-0.00901859   0.0195219)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.79 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     55 degrees of freedom 
# Null hypothesis probability =   3.386111e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.571e-09   5.056e-09
25- 50  1.269e-08   6.156e-09
50-150  7.406e-08   3.837e-08
15-150  9.532e-08   4.597e-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: 1.42878     ( -1.34714   1.76223 )
Norm@50keV  : 6.49183E-04    ( -0.0006493   0.00035912 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.64 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     57 degrees of freedom 
# Null hypothesis probability =   2.543446e-01
 
Photon flux (15-150 keV)    in 16.42 sec: 7.95671E-02 ( -0.079567  0.0453166 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.02471e-07 ( -1.02474e-07  6.55674e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.75386     ( -2.25034   1.74124 )
Epeak [keV] : 560.431      ( -9999.36 -9999.36 )
Norm@50keV  : 2.17061E-05    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.55 using 59 PHA bins.
# Reduced chi-squared =          1.117 for     56 degrees of freedom 
# Null hypothesis probability =   2.549863e-01
 
Photon flux (15-150 keV)    in 16.42 sec: 8.04316E-02 ( -0.045396  0.0445814 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01925e-07 ( -6.47531e-08  6.61366e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -6.08418   ( 6.08418   6.08418 )
beta        : -1.42709    ( -1.75995   1.34521 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV   : 8.82474E-02    ( -0.0882506   0.0488089 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.64 using 59 PHA bins.
# Reduced chi-squared =          1.157 for     55 degrees of freedom 
# Null hypothesis probability =   1.985646e-01
 
Photon flux (15-150 keV)    in 16.42 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 7.38e-08
S(50-100 keV) = 1.19e-07

T90 vs. Hardness ratio plot

T90                                   = 87.6719999909401 sec.
Hardness ratio (energy fluence ratio) = 1.61247

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 6.997
Count Ratio (50-100 keV) / (15-25 keV) = 6.43862

Mask shadow pattern

IMX = 0.714634977033, IMY = 0.0349904088144

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:
-239.256000 0.020000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
194.7763  39.1445    2.2  21.3   44.2   1.1374   5.1 ------	UNKNOWN                       
168.6503 -26.2046    3.0  54.1  177.2   2.8145   3.8 ------	UNKNOWN                       
149.4635 -27.1149    3.2  59.4 -163.2   5.6183   3.6 ------	UNKNOWN                       
137.5524 -15.5205    3.9  55.3 -144.8   3.1779   3.0 ------	UNKNOWN

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

Time interval of the image:
0.020000 16.444600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
213.4204  25.7493    2.4  35.9   75.9   0.6504   4.9 ------	UNKNOWN                       
151.2703 -14.5902    2.3  47.3 -158.4   0.3762   5.0 ------	UNKNOWN                       
135.7791 -11.2758    2.3  53.2 -139.8   1.1310   5.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
78.844600 962.854000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
216.5169  55.1146    2.8  20.3  109.9   2.2198   4.1 ------	UNKNOWN                       
182.2987  41.0889    3.2  22.1 -171.6   1.6345   3.6 ------	UNKNOWN                       
 73.7052  71.5630    2.1  36.2  -17.0   3.1958   5.5 ------	UNKNOWN                       
162.0100   9.2159   10.9  55.3 -144.8   2.9866   1.1 ------	UNKNOWN

Plot creation:
Tue Nov 10 17:03:23 EST 2015