batgrbproduct analysis for trigger=222683

batgrbproduct Analysis for Trigger=222683

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 14:33:54 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger222683
======================================================================

  Trigger: 00222683      Segment: 000

  BAT Trigger Time: 176446070.528   [s; MET]
      Trigger Stop: 176446074.624   [s; MET]
               UTC: 2006-08-05T04:47:49.167340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 220.918978393931   Dec: 12.5923851602665  [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:     10.7238052947636  [ if not an image trigger ]
     Image S/N Ratio:    7.64

  Flight Position:   [ source = BAT ]
    RA: 220.918978393931   Dec: 12.5923851602665  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 220.919   Dec: 12.5924  [deg; J2000]
        { 14h 43m 40.6s , +12d 35' 32.6" }
        +/- 2.65704343405 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.53167214015
 
 
  Angular difference between Flight and Ground position is 0.001547 arcmin
 
  Partial Coding Fraction: 0.9609375    [ including projection effects ]

  Duration
     T90: 4.92799997329712 +/- 1.3535848370652
        Measured from: -0.967999994754791
                   to: 3.95999997854233     [s; relative to TRIGTIME]
     T50: 1.85599997639656 +/- 1.57673080027528
        Measured from: 1.22400000691414
                   to: 3.0799999833107     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.715999990701675     
                   to: 1.71599999070168     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.22400000691414     
                   to: 4.52000001072884     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.058040   0.073028   0.019956  -0.001675
           0.011148   0.011449   0.009955   0.008474 [error]
 Peak      0.013319   0.021062   0.007894  -0.000102
           0.004809   0.004973   0.004196   0.003521 [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 1.78e-08 2.27e-08 2.11e-08 3.44e-08 7.31e-08 9.58e-08   erg/cm2
              Error 4.43e-09 4.93e-09 8.18e-09 2.55e-08 1.94e-08 3.63e-08   erg/cm2
Peak flux Power-law 1.15e-01 1.04e-01 6.49e-02 6.17e-02 3.10e-01 3.46e-01   ph/cm2/s
              Error 5.56e-02 3.64e-02 3.21e-02 6.74e-02 1.08e-01 1.24e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.70e-08 2.93e-08 8.86e-09 1.93e-10 5.53e-08 5.53e-08   erg/cm2
              Error 5.00e-09 7.54e-09 1.21e-08 7.97e-09 1.84e-08 2.06e-08   erg/cm2
Peak flux Cutoff-PL 8.96e-02 1.72e-01 1.23e-02 1.65e-06 2.74e-01 2.74e-01   ph/cm2/s
              Error 6.01e-02 6.23e-02 4.05e-02 1.09e-02 9.80e-02 9.80e-02   ph/cm2/s
 
Fluence        Band 1.68e-08 2.86e-08 1.34e-08 8.16e-09 6.30e-08 6.73e-08   erg/cm2
              Error 5.00e-09 7.15e-09 -------- 1.74e-08 1.92e-08 --------   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    2.106    0.380    -      -           1.37e-03 3.97e-04   62.310 57
CPL  -1.500    4.809      31.2   11.3      3.50e-01 0.00e+00   58.120 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.684    0.559    -      -           2.35e-03 9.11e-04   53.050 57
CPL  -6.207    0.000      33.8   17.8      3.66e+02 0.00e+00   48.710 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    5.744   -1.224    4.520
T90     4.928   -0.968    3.960
T50     1.856    1.224    3.080
Peak    1.000    0.716    1.716

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 15.0-50.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
220.919 12.592 0.000 8.780 104.685 0.103 7.532 TRIG_00222683
 
Image time interval: 0.000 to 4.096 [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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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   -1.224 sec. to    4.520 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.10552     ( -0.35626   0.403144 )
Norm@50keV  : 1.36950E-03    ( -0.000399684   0.000393865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.31 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     57 degrees of freedom 
# Null hypothesis probability =   2.929173e-01
 
Photon flux (15-150 keV)    in 5.744 sec: 0.216044 ( -0.0440559  0.0441112 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.31246e-08 ( -1.87164e-08  2.00071e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.224 sec. to    4.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.50038     ( -7.30975   2.30864 )
Epeak [keV] : 31.2189      ( -12.8197 9.79478 )
Norm@50keV  : 0.349799    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.12 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     56 degrees of freedom 
# Null hypothesis probability =   3.972858e-01
 
Photon flux (15-150 keV)    in 5.744 sec: 0.202819 ( -0.04331  0.044371 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.52908e-08 ( -1.46124e-08  2.2279e-08 ) ergs/cm2

Band function

Time interval is from   -1.224 sec. to    4.520 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.08430   ( -2.22565   -0.475065 )
beta        : -3.17982    ( 9.37167   19.3699 )
Epeak [keV] : 28.4486      ( -7.00777 12.5654 )
Norm@50keV   : 29.2231    ( -29.2456   29.5276 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.37 using 59 PHA bins.
# Reduced chi-squared =          1.025 for     55 degrees of freedom 
# Null hypothesis probability =   4.236141e-01
 
Photon flux (15-150 keV)    in 5.744 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.3018e-08 ( -6.29778e-08  -1.78333e-08 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 7.99709  (-1.41074  1.7803)
R^2/D10^2   : 0.254013  (-0.139609   0.291393)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.22 using 59 PHA bins.
# Reduced chi-squared =          1.021 for     57 degrees of freedom 
# Null hypothesis probability =   4.303908e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.687e-08   6.172e-09
25- 50  2.951e-08   1.065e-08
50-150  7.738e-09   4.481e-09
15-150  5.411e-08   2.018e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 46.4851       (-18.5848      42.6319)
Norm        : 1.29987       (-0.379975     0.577277)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.83 using 59 PHA bins.
# Reduced chi-squared =          1.050 for     57 degrees of freedom 
# Null hypothesis probability =   3.734130e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.793e-08   5.230e-09
25- 50  2.507e-08   8.739e-09
50-150  2.269e-08   1.394e-08
15-150  6.569e-08   2.582e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.14479        (-6.95432      2.36205)
R1^2/D10^2  : 0.349941        (-0.207323      -0.352687)
kT2 [keV]   : 23.4577        (-22.941      -22.941)
R2^2/D10^2  : 1.23163E-03    (-0.00135496   0.452687)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.11 using 59 PHA bins.
#Fit statistic : Chi-Squared =          57.08 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     55 degrees of freedom 
# Reduced chi-squared =          1.038 for     55 degrees of freedom 
# Null hypothesis probability =   3.967582e-01
# Null hypothesis probability =   3.978683e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.766e-08   1.095e-08
25- 50  2.764e-08   1.798e-08
50-150  1.933e-08   1.267e-08
15-150  6.464e-08   3.843e-08

Peak spectrum fit

Power-law model

Time interval is from    0.716 sec. to    1.716 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.68405     ( -0.540071   0.577555 )
Norm@50keV  : 2.34740E-03    ( -0.000920863   0.000901579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.05 using 59 PHA bins.
# Reduced chi-squared =         0.9307 for     57 degrees of freedom 
# Null hypothesis probability =   6.240239e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.310027 ( -0.107977  0.108022 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.17759e-08 ( -8.57938e-09  9.15909e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.716 sec. to    1.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -6.20680     (     )
Epeak [keV] : 33.7513      ( -6.70973 28.8648 )
Norm@50keV  : 366.182    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.71 using 59 PHA bins.
# Reduced chi-squared =         0.8698 for     56 degrees of freedom 
# Null hypothesis probability =   7.446077e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.273781 ( -0.093281  0.10265 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.34544e-08 ( -4.75098e-09  9.2605e-09 ) ergs/cm2

Band function

Time interval is from    0.716 sec. to    1.716 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 5.00000   ( -5.0889   -5 )
beta        : -2.94379    ( 2.94858   1.16969 )
Epeak [keV] : 32.6084      ( -8.08039 8.61643 )
Norm@50keV   : 76.4228    ( -23.7723   343.251 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.54 using 59 PHA bins.
# Reduced chi-squared =         0.8644 for     55 degrees of freedom 
# Null hypothesis probability =   7.523357e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.855e-08 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 9.92846  (-2.58743  4.15686)
R^2/D10^2   : 0.169106  (-0.169106   0.353297)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.72 using 59 PHA bins.
# Reduced chi-squared =         0.8724 for     57 degrees of freedom 
# Null hypothesis probability =   7.420261e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.386e-09   2.115e-09
25- 50  8.334e-09   5.025e-09
50-150  4.260e-09   3.437e-09
15-150  1.598e-08   1.017e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 95.2810       (-59.5562      -95.281)
Norm        : 1.42530       (-0.542562     0.854685)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.05 using 59 PHA bins.
# Reduced chi-squared =         0.9132 for     57 degrees of freedom 
# Null hypothesis probability =   6.606873e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.724e-09   2.325e-09
25- 50  6.375e-09   3.979e-09
50-150  1.005e-08   8.430e-09
15-150  2.015e-08   1.421e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 199.997        (-199.997      -199.997)
R1^2/D10^2  : 1.77651E-05        (-1.77651e-05      -1.77651e-05)
kT2 [keV]   : 9.35541        (-2.30314      4.20781)
R2^2/D10^2  : 0.201789    (-0.150769   0.268928)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.72 using 59 PHA bins.
#Fit statistic : Chi-Squared =          49.23 using 59 PHA bins.
# Reduced chi-squared =         0.9041 for     55 degrees of freedom 
# Reduced chi-squared =         0.8952 for     55 degrees of freedom 
# Null hypothesis probability =   6.757873e-01
# Null hypothesis probability =   6.935674e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.389e-09   3.944e-04
25- 50  8.332e-09   3.433e-03
50-150  4.260e-09   8.560e-02
15-150  1.598e-08   8.095e-02

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: 2.10552     ( -0.35626   0.403144 )
Norm@50keV  : 1.36950E-03    ( -0.000399684   0.000393865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.31 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     57 degrees of freedom 
# Null hypothesis probability =   2.929173e-01
 
Photon flux (15-150 keV)    in 5.744 sec: 0.216044 ( -0.0440559  0.0441112 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.31246e-08 ( -1.87164e-08  2.00071e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.50038     ( -7.30975   2.30864 )
Epeak [keV] : 31.2189      ( -12.8197 9.79478 )
Norm@50keV  : 0.349799    ( -0.326933   8512.08 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.12 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     56 degrees of freedom 
# Null hypothesis probability =   3.972858e-01
 
Photon flux (15-150 keV)    in 5.744 sec: 0.202819 ( -0.04331  0.044371 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.52908e-08 ( -1.46124e-08  2.2279e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.08430   ( -2.22565   -0.475065 )
beta        : -3.17982    ( 9.37167   19.3699 )
Epeak [keV] : 28.4486      ( -7.00777 12.5654 )
Norm@50keV   : 29.2231    ( -29.2456   29.5276 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.37 using 59 PHA bins.
# Reduced chi-squared =          1.025 for     55 degrees of freedom 
# Null hypothesis probability =   4.236141e-01
 
Photon flux (15-150 keV)    in 5.744 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.3018e-08 ( -6.29778e-08  -1.78333e-08 ) ergs/cm2

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

S(25-50 keV)  = 2.27e-08
S(50-100 keV) = 2.11e-08

T90 vs. Hardness ratio plot

T90                                   = 4.92799997329712 sec.
Hardness ratio (energy fluence ratio) = 0.929515

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.25824
Count Ratio (50-100 keV) / (15-25 keV) = 0.343832

Mask shadow pattern

IMX = -0.0391541225918, IMY = -0.149408628234

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-239.528000 -1.224000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5031  35.3755   15.7  41.1   40.9   0.2586   0.7    3.0	Her X-1                       
241.8999  -4.4646    2.5  35.7  110.1   1.7231   4.6 ------	UNKNOWN                       
201.1323 -33.2564    3.7  51.5  178.5   1.3145   3.2 ------	UNKNOWN

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

Time interval of the image:
-1.224000 4.520000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4753  35.5100    5.6  41.1   40.7   0.1005   2.1   10.1	Her X-1                       
226.2703  16.6107    1.8  12.7   75.5   0.1340   6.3 ------	UNKNOWN                       
220.9346  12.5770    1.7   8.8  104.7   0.1418   6.8 ------	UNKNOWN                       
201.3654 -23.6877    2.6  42.2 -178.3   0.1387   4.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
77.372600 934.972600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9729 -15.6500    0.4  37.0  123.4  32.2905  28.2    0.7	Sco X-1                       
254.3612  35.2527   46.7  37.7   31.6   0.1956   0.2    7.2	Her X-1                       
207.3283 -40.0910    3.0  54.2  177.0   6.7998   3.8 ------	UNKNOWN

Plot creation:
Thu Oct  8 20:39:55 EDT 2015