batgrbproduct analysis for trigger=1347179

batgrbproduct Analysis for Trigger=1347179

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): Sun Mar  1 00:54:57 EST 2026
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1347179
======================================================================

  Trigger: 01347179      Segment: 000

  BAT Trigger Time: 778700259.328   [s; MET]
      Trigger Stop: 778700260.352   [s; MET]
               UTC: 2025-09-04T17:37:03.058860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 84.3577955922695   Dec: 3.58459228169204  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.77
     Image Trigger?:     NO
     Rate S/N Ratio:     20.4205778566621  [ if not an image trigger ]
     Image S/N Ratio:    8.77

  Flight Position:   [ source = BAT ]
    RA: 84.3577955922695   Dec: 3.58459228169204  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 84.3755962411007   Dec: 3.57932946510642  [deg; J2000]  
        { 05h 37m 30.1s , +03d 34' 45.6" }
         +/- 0.995162425187277 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.358002626562245 [arcmin] (formal 1-sigma fit error)
    SNR: 30.6285893106182
 
  Angular difference between Flight and Ground position is 1.111739 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 46.7479999065399 +/- 14.0365130445697
        Measured from: -6.57199990749359
                   to: 40.1759999990463     [s; relative to TRIGTIME]
     T50: 13.8959999084473 +/- 1.72488262545102
        Measured from: 3.78000009059906
                   to: 17.6759999990463     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 5.10800004005432     
                   to: 6.10800004005432     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -19.2039999961853     
                   to: 56.5880000591278     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.784096   0.983556   0.840780   0.251104
           0.052296   0.054352   0.045911   0.036486 [error]
 Peak      0.029552   0.046729   0.052997   0.016841
           0.006305   0.006777   0.006167   0.004798 [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 2.08e-07 4.12e-07 6.31e-07 2.11e-06 1.77e-06 3.37e-06   erg/cm2
              Error 2.27e-08 2.60e-08 4.51e-08 3.44e-07 1.10e-07 3.71e-07   erg/cm2
Peak flux Power-law 2.61e-01 3.36e-01 3.16e-01 5.23e-01 1.09e+00 1.44e+00   ph/cm2/s
              Error 7.11e-02 5.55e-02 4.73e-02 1.71e-01 1.51e-01 2.09e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.08e-07 4.12e-07 6.31e-07 2.10e-06 1.77e-06 3.40e-06   erg/cm2
              Error 2.27e-08 2.60e-08 4.52e-08 2.39e-07 1.10e-07 4.22e-07   erg/cm2
Peak flux Cutoff-PL 2.52e-01 3.39e-01 3.21e-01 4.45e-01 1.08e+00 1.36e+00   ph/cm2/s
              Error 7.86e-02 5.53e-02 5.60e-02 1.93e-01 1.53e-01 3.00e-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    1.383    0.105    -      -           2.40e-03 1.36e-04   51.550 57
CPL   1.384    0.106    9999.4    0.0      2.41e-03 3.66e-04   51.590 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.089    0.238    -      -           9.39e-03 1.26e-03   66.460 57
CPL   0.941    0.722     401.7    0.0      1.10e-02 1.30e-02   66.390 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: 24.896000 sec.
T50 in the 50-300 keV band: 9.984000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   75.792  -19.204   56.588
T90    46.748   -6.572   40.176
T50    13.896    3.780   17.676
Peak    1.000    5.108    6.108

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
   84.3756     3.5793   0.0063    13.6316    -6.7139         2.2884759     30.629 TRIG_01347179                 
 
Foreground time interval of the image:
-19.204  20.173 (delta_t =  39.377 [sec])
Background time interval of the image:
-239.328 -19.204 (delta_t = 220.124 [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  -19.204 sec. to   56.588 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38340     ( -0.105536   0.105241 )
Norm@50keV  : 2.40365E-03    ( -0.00013571   0.000135577 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.55     using 59 bins.
 Reduced chi-squared = 0.904386
# Null hypothesis probability of 6.79e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 75.79 sec: 0.291642 ( -0.01717  0.017232 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.76657e-06 ( -1.10072e-07  1.10632e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -19.204 sec. to   56.588 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38434     ( -0.110152   0.102117 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 2.40804E-03    ( -0.000135657   0.000596835 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.59     using 59 bins.
 Reduced chi-squared = 0.92125
# Null hypothesis probability of 6.43e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 75.79 sec: 0.293232 ( -0.018828  0.015578 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.76609e-06 ( -1.10235e-07  1.10555e-07 ) ergs/cm2

Band function

Time interval is from  -19.204 sec. to   56.588 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]    : 17.8154  (  )
R^2/D10^2   : 1.80432E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  154.00     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.36e-11 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.718e-08   1.066e-08
25- 50  4.001e-07   3.160e-08
50-150  9.193e-07   9.701e-08
15-150  1.407e-06   9.663e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-17.0278      -200)
Norm        : 1.20622       (-0.068276     0.068276)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.08     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.42e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.276e-07   1.417e-08
25- 50  4.379e-07   3.403e-08
50-150  9.603e-07   1.793e-07
15-150  1.626e-06   1.811e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.51761        (-0.974444      1.12744)
R1^2/D10^2  : 0.399401        (-0.175315      0.340614)
kT2 [keV]   : 31.2116        (-4.63586      6.98071)
R2^2/D10^2  : 2.43196E-03    (-0.00112845   0.00168502)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.47     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.55e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.180e-07   3.918e-08
25- 50  3.982e-07   6.609e-08
50-150  1.191e-06   2.323e-07
15-150  1.808e-06   2.827e-07

Peak spectrum fit

Power-law model

Time interval is from    5.108 sec. to    6.108 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08907     ( -0.242043   0.23447 )
Norm@50keV  : 9.39388E-03    ( -0.00126546   0.00126335 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.46     using 59 bins.
 Reduced chi-squared = 1.16596
# Null hypothesis probability of 1.83e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.08850 ( -0.150541  0.15105 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.85712e-08 ( -1.44975e-08  1.46037e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    5.108 sec. to    6.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.941272     ( -1.08149   0.363409 )
Epeak [keV] : 401.749      ( -401.755 -401.755 )
Norm@50keV  : 1.09847E-02    ( -0.00436226   0.0215733 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.39     using 59 bins.
 Reduced chi-squared = 1.18554
# Null hypothesis probability of 1.61e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.08225 ( -0.15606  0.14964 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.4494e-08 ( -1.02602e-08  5.08476e-09 ) ergs/cm2

Band function

Time interval is from    5.108 sec. to    6.108 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]    : 20.8296  (-3.40641  4.42552)
R^2/D10^2   : 4.52843E-02  (-0.0208106   0.0355543)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   75.56     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.05e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.725e-09   1.090e-09
25- 50  1.905e-08   4.355e-09
50-150  6.156e-08   1.440e-08
15-150  8.433e-08   1.723e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-36.7084      -200)
Norm        : 4.46869       (-0.620239     0.620239)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   76.95     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.03e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.112e-08   6.255e-09
25- 50  2.140e-08   1.189e-08
50-150  4.693e-08   2.620e-08
15-150  7.946e-08   4.349e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.21807        (-2.48927      10.5357)
R1^2/D10^2  : 2.12972        (-1.98681      41.3452)
kT2 [keV]   : 26.2834        (-5.83781      -26.2834)
R2^2/D10^2  : 1.98072E-02    (-0.0193835   0.0176409)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.93     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.30e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.439e-09   4.678e-09
25- 50  1.789e-08   7.535e-09
50-150  6.853e-08   3.100e-08
15-150  9.486e-08   3.985e-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: 1.31729     ( -0.0973132   0.0968368 )
Norm@50keV  : 3.75841E-03    ( -0.000194141   0.000194133 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   42.15     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.29e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 39.38 sec: 0.449848 ( -0.0244709  0.0245674 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.4565e-06 ( -8.28532e-08  8.31564e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31743     ( -0.106037   0.0940802 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 3.76819E-03    ( -0.000194741   0.000866314 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   42.19     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.14e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 39.38 sec: 0.449689 ( -0.012204  0.024501 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45521e-06 ( -8.15048e-08  8.47655e-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)  = 4.12e-07
S(50-100 keV) = 6.31e-07

T90 vs. Hardness ratio plot

T90                                   = 46.7479999065399 sec.
Hardness ratio (energy fluence ratio) = 1.53155

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.25438
Count Ratio (50-100 keV) / (15-25 keV) = 1.07229

Mask shadow pattern

IMX = 2.408471398172416E-01, IMY = 2.835244323493349E-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:
-239.328000 -19.204000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6107  22.0192    0.4   6.2 -140.1   8.6601  26.2    1.3	Crab                          
 40.1457  16.4832    2.2  38.5  106.4   5.5873   5.2 ------	UNKNOWN                       
 98.8820 -37.3924    2.8  56.8   -7.0   4.5296   4.1 ------	UNKNOWN

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

Time interval of the image:
-19.204000 20.172600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6329  22.1660    6.4   6.4 -140.7   0.1443   1.8    9.1	Crab                          
 84.3756   3.5793    0.4  13.6   -6.7   2.2885  30.6 ------	UNKNOWN                       
114.5113 -16.8612    2.0  47.5  -36.2   1.1876   5.7 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
65.572600 442.172620
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6251  22.0073    0.4  18.4 -175.6  14.8498  27.9    0.6	Crab                          
 82.0301 -48.6949    3.3  52.3    8.5   4.6437   3.5 ------	UNKNOWN                       
 95.1071  58.6064    2.2  55.7 -166.7   9.1611   5.1 ------	UNKNOWN

Plot creation:
Sun Mar  1 23:27:36 EST 2026