batgrbproduct analysis for trigger=1131397

batgrbproduct Analysis for Trigger=1131397

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 v2.48
    Process Start Time (local time): Wed Jun 14 12:15:58 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1131397
======================================================================

  Trigger: 01131397      Segment: 000

  BAT Trigger Time: 688590848.896   [s; MET]
      Trigger Stop: 688590849.92   [s; MET]
               UTC: 2022-10-27T19:13:38.784400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 225.602970286955   Dec: 47.4481624691975  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.69
     Image Trigger?:     NO
     Rate S/N Ratio:     22.2710574513201  [ if not an image trigger ]
     Image S/N Ratio:    14.69

  Flight Position:   [ source = BAT ]
    RA: 225.602970286955   Dec: 47.4481624691975  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 225.600737176053   Dec: 47.4525858854227  [deg; J2000]  
        { 15h 02m 24.2s , +47d 27' 09.3" }
         +/- 1.6146741935712 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.602663596532404 [arcmin] (formal 1-sigma fit error)
    SNR: 15.3410198212875
 
  Angular difference between Flight and Ground position is 0.280445 arcmin
 
  Partial Coding Fraction: 0.4570312    [ including projection effects ]

  Duration
     T90: 8.84800004959106 +/- 1.53633333421838
        Measured from: -5.31200003623962
                   to: 3.53600001335144     [s; relative to TRIGTIME]
     T50: 1.7279999256134 +/- 2.51031801570599
        Measured from: -0.575999975204468
                   to: 1.15199995040894     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.108000040054321     
                   to: 0.891999959945679     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.5440000295639     
                   to: 4.19200003147125     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.422160   0.477524   0.148096   0.021677
           0.037005   0.037516   0.031298   0.026756 [error]
 Peak      0.131527   0.170281   0.055992   0.009433
           0.013351   0.014454   0.011422   0.008143 [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 1.72e-07 1.87e-07 1.45e-07 1.86e-07 5.74e-07 6.90e-07   erg/cm2
              Error 2.22e-08 1.93e-08 2.83e-08 6.83e-08 6.63e-08 1.06e-07   erg/cm2
Peak flux Power-law 1.66e+00 1.13e+00 4.99e-01 3.06e-01 3.44e+00 3.59e+00   ph/cm2/s
              Error 2.33e-01 1.22e-01 8.72e-02 9.64e-02 3.70e-01 3.86e-01   ph/cm2/s
 
Fluence   Cutoff-PL -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Cutoff-PL 1.47e+00 1.43e+00 4.23e-01 2.64e-02 3.35e+00 3.35e+00   ph/cm2/s
              Error 2.60e-01 1.93e-01 1.35e-01 4.60e-02 3.70e-01 3.71e-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    2.365    0.198    -      -           5.52e-03 7.85e-04   67.350 57
CPL   1.137    1.375      25.1   15.8      3.29e-02 2.99e-01   63.820 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.173    0.181    -      -           2.11e-02 2.87e-03   69.450 57
CPL   0.071    1.273      34.7    5.4      4.13e-01 1.81e+00   55.950 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   10.736   -6.544    4.192
T90     8.848   -5.312    3.536
T50     1.728   -0.576    1.152
Peak    1.000   -0.108    0.892

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  225.6007    47.4526   0.0125    42.6614   177.4083         1.0924919     15.341 TRIG_01131397                 
 
Foreground time interval of the image:
 -6.544   4.192 (delta_t =  10.736 [sec])
Background time interval of the image:
-239.896  -6.544 (delta_t = 233.352 [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 1.024000

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 1.024000

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 1.024000

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   -6.544 sec. to    4.192 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.36473     ( -0.190677   0.204468 )
Norm@50keV  : 5.52053E-03    ( -0.000791552   0.000777669 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.35     using 59 bins.
 Reduced chi-squared = 1.18158
# Null hypothesis probability of 1.64e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 10.74 sec: 1.00087 ( -0.098182  0.09822 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.74029e-07 ( -6.56309e-08  6.68913e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -6.544 sec. to    4.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13679     ( -1.88387   0.86577 )
Epeak [keV] : 25.1245      ( -24.1824 7.44396 )
Norm@50keV  : 3.28811E-02    ( -0.0335534   0.564364 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.82     using 59 bins.
 Reduced chi-squared = 1.13964
# Null hypothesis probability of 2.21e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 10.74 sec: 0.963126 ( -0.105214  0.104544 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from   -6.544 sec. to    4.192 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 7.52437  (-0.730496  0.817785)
R^2/D10^2   : 1.41199  (-0.492905   0.7513)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   68.99     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.33e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.478e-07   2.443e-08
25- 50  2.319e-07   3.147e-08
50-150  4.955e-08   1.580e-08
15-150  4.292e-07   5.268e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 36.7468       (-7.89034      10.9632)
Norm        : 6.86815       (-1.27848     1.63202)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.79     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.50e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.643e-07   2.100e-08
25- 50  2.081e-07   2.411e-08
50-150  1.463e-07   4.235e-08
15-150  5.187e-07   6.320e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.67117        (-0.902382      0.894599)
R1^2/D10^2  : 2.13144        (-0.824793      1.53534)
kT2 [keV]   : 33.7826        (-16.4217      -33.7827)
R2^2/D10^2  : 1.88536E-03    (-0.00184572   0.0189574)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.03     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.36e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.586e-07   3.574e-08
25- 50  2.150e-07   4.822e-08
50-150  1.918e-07   1.026e-07
15-150  5.654e-07   1.574e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.108 sec. to    0.892 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.17302     ( -0.175524   0.186274 )
Norm@50keV  : 2.10520E-02    ( -0.00289856   0.00285131 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   69.45     using 59 bins.
 Reduced chi-squared = 1.21842
# Null hypothesis probability of 1.25e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.43690 ( -0.37017  0.37024 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97247e-07 ( -2.41976e-08  2.45063e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.108 sec. to    0.892 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 7.11754E-02     ( -1.45728   1.08917 )
Epeak [keV] : 34.6668      ( -5.4818 5.32156 )
Norm@50keV  : 0.412678    ( -0.420179   3.20779 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.95     using 59 bins.
 Reduced chi-squared = 0.999107
# Null hypothesis probability of 4.77e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.34958 ( -0.36944  0.37055 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from   -0.108 sec. to    0.892 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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]    : 8.76768  (-0.905964  1.00317)
R^2/D10^2   : 2.85018  (-1.00236   1.54242)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.93     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.70e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.206e-08   7.300e-09
25- 50  8.577e-08   1.122e-08
50-150  3.019e-08   9.655e-09
15-150  1.580e-07   2.095e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 47.6738       (-10.4338      15.0088)
Norm        : 20.6622       (-3.34485     4.17642)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.60     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.81e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.995e-08   7.155e-09
25- 50  7.050e-08   9.155e-09
50-150  6.539e-08   1.857e-08
15-150  1.858e-07   2.525e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.70870        (-2.05861      1.72687)
R1^2/D10^2  : 5.95949        (-2.51882      6.66588)
kT2 [keV]   : 16.0308        (-8.32239      -19.5153)
R2^2/D10^2  : 0.107865    (-0.046446   0.689869)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.29     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.40e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.687e-08   2.688e-08
25- 50  7.596e-08   4.133e-08
50-150  5.075e-08   3.152e-08
15-150  1.736e-07   9.060e-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: 2.36473     ( -0.190677   0.204468 )
Norm@50keV  : 5.52053E-03    ( -0.000791552   0.000777669 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.35     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.64e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 10.74 sec: 1.00075 ( -0.0981671  0.0982031 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.73897e-07 ( -6.55984e-08  6.69081e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14307     ( -1.88857   0.876308 )
Epeak [keV] : 25.0821      ( -23.3818 7.46552 )
Norm@50keV  : 3.25683E-02    ( -0.0334431   0.564578 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.82     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.21e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 10.74 sec: 0.962795 ( -0.105119  0.104515 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.08854e-07 ( -7.85191e-08  8.81367e-08 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  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)  = 1.87e-07
S(50-100 keV) = 1.45e-07

T90 vs. Hardness ratio plot

T90                                   = 8.84800004959106 sec.
Hardness ratio (energy fluence ratio) = 0.775401

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.13114
Count Ratio (50-100 keV) / (15-25 keV) = 0.350805

Mask shadow pattern

IMX = -9.205829732229645E-01, IMY = -4.167005463225783E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-239.896000 -6.544000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
156.9907  42.6781    4.6  27.2   92.3   2.1664   2.6 ------	UNKNOWN                       
166.2179  28.7559    3.5  13.8   66.6   2.0178   3.3 ------	UNKNOWN                       
177.6817 -15.9416    2.1  39.9  -42.9   5.8973   5.4 ------	UNKNOWN

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

Time interval of the image:
-6.544000 4.192000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
225.6007  47.4526    0.7  42.7  177.4   1.0926  15.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
108.604600 962.235100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3998  35.5384    0.0  24.5 -176.1   1.5570   0.7   12.1	Her X-1                       
256.1016  11.6805    2.8  44.0 -150.5  19.8647   4.1 ------	UNKNOWN

Plot creation:
Wed Jun 14 13:57:48 EDT 2023