batgrbproduct analysis for trigger=667392

batgrbproduct Analysis for Trigger=667392

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 Mar 13 22:04:06 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger667392
======================================================================

  Trigger: 00667392      Segment: 000

  BAT Trigger Time: 471841304.512   [s; MET]
      Trigger Stop: 471841305.024   [s; MET]
               UTC: 2015-12-15T03:01:28.957040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 93.5948780255951   Dec: 35.5094452220509  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.38
     Image Trigger?:     NO
     Rate S/N Ratio:     13.4164078649987  [ if not an image trigger ]
     Image S/N Ratio:    8.38

  Flight Position:   [ source = BAT ]
    RA: 93.5948780255951   Dec: 35.5094452220509  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 93.6220121456678   Dec: 35.5311972156442  [deg; J2000]  
        { 06h 14m 29.3s , +35d 31' 52.3" }
         +/- 2.7617075848905 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.23891785382886 [arcmin] (formal 1-sigma fit error)
    SNR: 7.12630709045457
 
  Angular difference between Flight and Ground position is 1.859888 arcmin
 
  Partial Coding Fraction: 0.515625    [ including projection effects ]

  Duration
     T90: 17.8479999899864 +/- 1.01371396706698
        Measured from: -15.0800000429153
                   to: 2.76799994707108     [s; relative to TRIGTIME]
     T50: 13.4359999895096 +/- 12.6524377315551
        Measured from: -12.7880000472069
                   to: 0.647999942302704     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.164000034332275     
                   to: 0.835999965667725     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15.460000038147     
                   to: 3.12799996137619     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.234536   0.215552   0.108779   0.021743
           0.035345   0.036595   0.031921   0.026498 [error]
 Peak      0.037885   0.087559   0.067219   0.008438
           0.008981   0.009913   0.009055   0.006769 [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 6.77e-08 9.26e-08 9.31e-08 1.70e-07 3.09e-07 4.24e-07   erg/cm2
              Error 1.61e-08 1.70e-08 2.94e-08 1.04e-07 6.89e-08 1.39e-07   erg/cm2
Peak flux Power-law 4.97e-01 5.22e-01 3.88e-01 4.67e-01 1.59e+00 1.87e+00   ph/cm2/s
              Error 1.13e-01 7.99e-02 6.83e-02 1.56e-01 2.33e-01 2.80e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.49e-08 1.04e-07 8.50e-08 3.63e-08 2.79e-07 2.90e-07   erg/cm2
              Error 1.72e-08 2.40e-08 3.99e-08 -------- 7.71e-08 --------   erg/cm2
Peak flux Cutoff-PL 3.60e-01 6.26e-01 4.55e-01 1.09e-01 1.53e+00 1.55e+00   ph/cm2/s
              Error 1.32e-01 1.06e-01 8.89e-02 -------- 2.35e-01 2.49e-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    1.990    0.328    -      -           1.80e-03 4.20e-04   70.280 57
CPL   1.095    1.572      39.1    0.0      6.32e-03 0.00e+00   68.950 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.427    0.216    -      -           1.29e-02 1.91e-03   66.710 57
CPL  -0.452    1.236      65.2   17.9      1.16e-01 2.78e-01   56.330 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: 1.152000 sec.
T50 in the 50-300 keV band: 0.512000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   18.588  -15.460    3.128
T90    17.848  -15.080    2.768
T50    13.436  -12.788    0.648
Peak    1.000   -0.164    0.836

Click here for the BAT GCN circular template

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   93.6220    35.5312   0.0269    28.6473    47.6567         0.5469556      7.126 TRIG_00667392                 
 
Foreground time interval of the image:
-15.460   3.128 (delta_t =  18.588 [sec])
Background time interval of the image:
-59.811 -15.460 (delta_t =  44.351 [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  -15.460 sec. to    3.128 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.98956     ( -0.312456   0.343733 )
Norm@50keV  : 1.79848E-03    ( -0.000427002   0.00041375 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.28 using 59 PHA bins.
# Reduced chi-squared =          1.233 for     57 degrees of freedom 
# Null hypothesis probability =   1.112693e-01
 
Photon flux (15-150 keV)    in 18.59 sec: 0.268505 ( -0.048201  0.0482 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.08218e-07 ( -6.75166e-08  7.02148e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -15.460 sec. to    3.128 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09512     ( -2.05266   1.09177 )
Epeak [keV] : 39.0931      (   )
Norm@50keV  : 6.32491E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.95 using 59 PHA bins.
# Reduced chi-squared =          1.231 for     56 degrees of freedom 
# Null hypothesis probability =   1.145580e-01
 
Photon flux (15-150 keV)    in 18.59 sec: 0.262298 ( -0.048672  0.048983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.78869e-07 ( -7.254e-08  8.16099e-08 ) ergs/cm2

Band function

Time interval is from  -15.460 sec. to    3.128 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.94445   ( -6.52182   -4.94445 )
beta        : -2.36379    ( -0.736541   0.459389 )
Epeak [keV] : 24.8065      ( -6.23025 4.77581 )
Norm@50keV   : 304.734    ( -53.5313   1851.85 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.57 using 59 PHA bins.
# Reduced chi-squared =          1.210 for     55 degrees of freedom 
# Null hypothesis probability =   1.363556e-01
 
Photon flux (15-150 keV)    in 18.59 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]    : 8.70588  (-1.6583  2.18785)
R^2/D10^2   : 0.217405  (-0.125986   0.277269)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.07 using 59 PHA bins.
# Reduced chi-squared =          1.282 for     57 degrees of freedom 
# Null hypothesis probability =   7.433143e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.856e-08   1.929e-08
25- 50  1.181e-07   3.644e-08
50-150  4.065e-08   2.074e-08
15-150  2.173e-07   6.149e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 61.5834       (-25.104      58.9475)
Norm        : 1.40710       (-0.362076     0.503343)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.99 using 59 PHA bins.
# Reduced chi-squared =          1.210 for     57 degrees of freedom 
# Null hypothesis probability =   1.326508e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.601e-08   1.536e-08
25- 50  1.013e-07   2.711e-08
50-150  1.177e-07   5.948e-08
15-150  2.850e-07   8.970e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.31470        (-2.10612      2.34937)
R1^2/D10^2  : 0.580938        (-0.38768      1.78218)
kT2 [keV]   : 21.4949        (-17.1926      96.3978)
R2^2/D10^2  : 4.02542E-03    (-0.00405055   0.0495095)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.18 using 59 PHA bins.
# Reduced chi-squared =          1.222 for     55 degrees of freedom 
# Null hypothesis probability =   1.254760e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.783e-08   3.906e-08
25- 50  1.020e-07   5.546e-08
50-150  1.240e-07   6.731e-08
15-150  2.938e-07   1.564e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.164 sec. to    0.836 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42737     ( -0.214755   0.217519 )
Norm@50keV  : 1.29492E-02    ( -0.00191838   0.00191136 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.71 using 59 PHA bins.
# Reduced chi-squared =          1.170 for     57 degrees of freedom 
# Null hypothesis probability =   1.777593e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.58711 ( -0.23249  0.23275 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24454e-07 ( -1.99339e-08  2.01399e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.164 sec. to    0.836 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.452103     ( -1.39915   1.07351 )
Epeak [keV] : 65.2387      ( -11.3414 24.4028 )
Norm@50keV  : 0.115866    ( -0.115865   0.440154 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.33 using 59 PHA bins.
# Reduced chi-squared =          1.006 for     56 degrees of freedom 
# Null hypothesis probability =   4.624742e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.53016 ( -0.23415  0.23494 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14839e-07 ( -1.99185e-08  2.07111e-08 ) ergs/cm2

Band function

Time interval is from   -0.164 sec. to    0.836 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.452595   ( -0.783946   1.3856 )
beta        : -10.0000    ( 10   7.10543e-15 )
Epeak [keV] : 65.2229      ( -10.3792 24.4053 )
Norm@50keV   : 0.115955    ( -0.115955   0.441681 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.33 using 59 PHA bins.
# Reduced chi-squared =          1.024 for     55 degrees of freedom 
# Null hypothesis probability =   4.249000e-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]    : 15.4874  (-2.08554  2.43812)
R^2/D10^2   : 0.182130  (-0.0738371   0.11909)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.91 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     57 degrees of freedom 
# Null hypothesis probability =   4.415910e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.094e-09   2.294e-09
25- 50  3.720e-08   7.945e-09
50-150  6.156e-08   1.658e-08
15-150  1.079e-07   1.984e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-76.7836      -199.363)
Norm        : 6.62993       (-0.951322     0.952569)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.24 using 59 PHA bins.
# Reduced chi-squared =          1.127 for     57 degrees of freedom 
# Null hypothesis probability =   2.377571e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.651e-08   9.405e-09
25- 50  3.176e-08   1.780e-08
50-150  6.965e-08   3.868e-08
15-150  1.179e-07   6.655e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.03662        (-7.03746      -7.03746)
R1^2/D10^2  : 0.767704        (-0.76745      -0.76745)
kT2 [keV]   : 18.2571        (-3.90732      -18.2575)
R2^2/D10^2  : 8.74156E-02    (-0.0874057   0.151072)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.97 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     55 degrees of freedom 
# Null hypothesis probability =   4.382843e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.195e-08   6.625e-09
25- 50  3.563e-08   1.909e-08
50-150  6.734e-08   3.892e-08
15-150  1.149e-07   5.815e-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: 1.98956     ( -0.312456   0.343733 )
Norm@50keV  : 1.79848E-03    ( -0.000427002   0.00041375 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.28 using 59 PHA bins.
# Reduced chi-squared =          1.233 for     57 degrees of freedom 
# Null hypothesis probability =   1.112693e-01
 
Photon flux (15-150 keV)    in 18.59 sec: 0.268485 ( -0.0481967  0.0481972 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.08161e-07 ( -6.74144e-08  7.02927e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.09307     ( -2.05212   1.04215 )
Epeak [keV] : 39.0766      (   )
Norm@50keV  : 6.34547E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.95 using 59 PHA bins.
# Reduced chi-squared =          1.231 for     56 degrees of freedom 
# Null hypothesis probability =   1.145580e-01
 
Photon flux (15-150 keV)    in 18.59 sec: 0.262244 ( -0.048656  0.048893 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.78926e-07 ( -7.25084e-08  8.16863e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.94445   ( -6.52182   -4.94445 )
beta        : -2.36379    ( -0.736541   0.459389 )
Epeak [keV] : 24.8065      ( -6.23025 4.77581 )
Norm@50keV   : 304.734    ( -53.5313   1851.85 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.57 using 59 PHA bins.
# Reduced chi-squared =          1.210 for     55 degrees of freedom 
# Null hypothesis probability =   1.363556e-01
 
Photon flux (15-150 keV)    in 18.59 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)  = 9.26e-08
S(50-100 keV) = 9.31e-08

T90 vs. Hardness ratio plot

T90                                   = 17.8479999899864 sec.
Hardness ratio (energy fluence ratio) = 1.0054

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.919057
Count Ratio (50-100 keV) / (15-25 keV) = 0.463805

Mask shadow pattern

IMX = 3.679645698738787E-01, IMY = -4.037742182533751E-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:
-59.811400 -15.460000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6396  21.9893    1.0  34.4   76.8   1.9109  11.4    1.6	Crab                          
132.1162  46.2794    2.2  46.0    4.3   0.7260   5.2 ------	UNKNOWN                       
136.9102  68.5761    2.2  39.2  -27.5   0.5532   5.2 ------	UNKNOWN

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

Time interval of the image:
-15.460000 3.128000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.7274  22.0745  130.7  34.3   76.6   0.0111   0.1    6.4	Crab                          
 39.6392   5.7473    2.6  48.2  145.7   1.0848   4.4 ------	UNKNOWN                       
 93.6220  35.5312    1.6  28.6   47.7   0.5470   7.1 ------	UNKNOWN                       
133.0173  48.2503    1.9  45.5    1.6   0.6146   6.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
151.988600 962.627100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6277  22.0124    0.3  16.0   83.6  32.6461  46.1    0.3	Crab                          
  6.2042  65.2752    3.1  57.1 -161.7  12.9011   3.7 ------	UNKNOWN                       
150.8424  13.6545    3.0  55.6  -34.0  19.6259   3.9 ------	UNKNOWN                       
150.9906  23.2802    5.1  50.8  -44.4  11.2728   2.2 ------	UNKNOWN

Plot creation:
Fri Mar 18 13:45:34 EDT 2016