batgrbproduct analysis for trigger=1352124

batgrbproduct Analysis for Trigger=1352124

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): Sat Feb 28 22:32:10 EST 2026
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1352124
======================================================================

  Trigger: 01352124      Segment: 000

  BAT Trigger Time: 780512702.912   [s; MET]
      Trigger Stop: 780512704.96   [s; MET]
               UTC: 2025-09-25T17:04:26.519420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 341.201363225776   Dec: 46.5737856026786  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.89
     Image Trigger?:     NO
     Rate S/N Ratio:     11.9582607431014  [ if not an image trigger ]
     Image S/N Ratio:    8.89

  Flight Position:   [ source = BAT ]
    RA: 341.201363225776   Dec: 46.5737856026786  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 341.207555476364   Dec: 46.5483159466766  [deg; J2000]  
        { 22h 44m 49.8s , +46d 32' 53.9" }
         +/- 0.966692095296596 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.325805028886159 [arcmin] (formal 1-sigma fit error)
    SNR: 31.9253218161725
 
  Angular difference between Flight and Ground position is 1.549384 arcmin
 
  Partial Coding Fraction: 0.765625    [ including projection effects ]

  Duration
     T90: 62.6879999637604 +/- 6.74230383938345
        Measured from: -13.6039999723434
                   to: 49.0839999914169     [s; relative to TRIGTIME]
     T50: 34.3039999008179 +/- 2.9221094269534
        Measured from: -1.91599988937378
                   to: 32.3880000114441     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.192000031471252     
                   to: 1.19200003147125     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.7679998874664     
                   to: 64.4240000247955     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.665499   1.774821   1.054639   0.213129
           0.063367   0.065352   0.054437   0.043877 [error]
 Peak      0.036116   0.058562   0.035581   0.008507
           0.007010   0.007667   0.006429   0.004957 [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 5.15e-07 7.58e-07 8.33e-07 1.72e-06 2.63e-06 3.83e-06   erg/cm2
              Error 3.94e-08 3.42e-08 5.63e-08 2.49e-07 1.29e-07 2.94e-07   erg/cm2
Peak flux Power-law 3.88e-01 3.82e-01 2.63e-01 2.85e-01 1.15e+00 1.32e+00   ph/cm2/s
              Error 9.84e-02 6.08e-02 5.30e-02 1.17e-01 1.76e-01 2.05e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.14e-07 7.58e-07 8.33e-07 1.70e-06 2.63e-06 3.80e-06   erg/cm2
              Error 3.52e-08 3.77e-08 5.63e-08 4.37e-07 1.40e-07 5.13e-07   erg/cm2
Peak flux Cutoff-PL 3.79e-01 3.87e-01 2.66e-01 2.45e-01 1.14e+00 1.28e+00   ph/cm2/s
              Error 1.03e-01 6.99e-02 5.81e-02 2.05e-01 1.80e-01 2.52e-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    1.864    0.088    -      -           3.32e-03 1.61e-04   48.060 57
CPL   1.854    0.311     704.4  -30.6      3.36e-03 1.30e-03   48.060 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.537    0.266    -      -           9.09e-03 1.45e-03   46.360 57
CPL   2.015   -0.144       6.1    0.0      4.99e-03 0.00e+00   46.260 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: 58.432000 sec.
T50 in the 50-300 keV band: 25.856000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   86.192  -21.768   64.424
T90    62.688  -13.604   49.084
T50    34.304   -1.916   32.388
Peak    1.000    0.192    1.192

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
  341.2076    46.5483   0.0061    22.1745   136.0874         4.5474478     31.925 TRIG_01352124                 
 
Foreground time interval of the image:
-21.768  64.424 (delta_t =  86.192 [sec])
Background time interval of the image:
-239.912 -209.316 (delta_t =  30.596 [sec])
-207.912 -21.768 (delta_t = 186.144 [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 2.048000

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 2.048000

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 2.048000

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  -21.768 sec. to   64.424 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86367     ( -0.0872953   0.0884553 )
Norm@50keV  : 3.31688E-03    ( -0.000162018   0.000160836 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.06     using 59 bins.
 Reduced chi-squared = 0.843158
# Null hypothesis probability of 7.94e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 86.19 sec: 0.468861 ( -0.021958  0.022045 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.62867e-06 ( -1.28232e-07  1.28961e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -21.768 sec. to   64.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85386     ( -0.328804   0.29389 )
Epeak [keV] : 704.360      ( -753.418 -814.698 )
Norm@50keV  : 3.35630E-03    ( -0.00102255   0.00156767 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.06     using 59 bins.
 Reduced chi-squared = 0.858214
# Null hypothesis probability of 7.66e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 86.19 sec: 0.468597 ( -0.023948  0.022092 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.62655e-06 ( -1.49549e-07  1.29558e-07 ) ergs/cm2

Band function

Time interval is from  -21.768 sec. to   64.424 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]    : 12.0920  (  )
R^2/D10^2   : 0.101843  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  189.24     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.31e-16 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.716e-07   2.349e-08
25- 50  8.625e-07   4.581e-08
50-150  7.622e-07   8.098e-08
15-150  1.896e-06   9.438e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 97.4842       (-15.7834      21.2378)
Norm        : 2.03494       (-0.140744     0.156537)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.40     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.35e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.584e-07   4.103e-08
25- 50  7.885e-07   4.314e-08
50-150  1.259e-06   3.383e-07
15-150  2.506e-06   3.689e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.89305        (-0.772178      0.859563)
R1^2/D10^2  : 1.11842        (-0.448548      0.83931)
kT2 [keV]   : 22.7990        (-3.06957      4.35501)
R2^2/D10^2  : 7.55833E-03    (-0.00360161   0.00562114)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.31     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.16e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.949e-07   6.813e-08
25- 50  7.481e-07   7.895e-08
50-150  1.327e-06   2.215e-07
15-150  2.570e-06   2.900e-07

Peak spectrum fit

Power-law model

Time interval is from    0.192 sec. to    1.192 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.53730     ( -0.26201   0.270388 )
Norm@50keV  : 9.08775E-03    ( -0.00145667   0.00143584 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.36     using 59 bins.
 Reduced chi-squared = 0.813333
# Null hypothesis probability of 8.42e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.14630 ( -0.176331  0.17657 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.57215e-08 ( -1.48568e-08  1.5032e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.192 sec. to    1.192 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.01533     ( -1.7265   -2.01533 )
Epeak [keV] : 6.13630      (   )
Norm@50keV  : 4.98884E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.26     using 59 bins.
 Reduced chi-squared = 0.826071
# Null hypothesis probability of 8.20e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.14155 ( -0.180549  0.17958 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.14588e-08 ( -1.60501e-08  1.24028e-08 ) ergs/cm2

Band function

Time interval is from    0.192 sec. to    1.192 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]    : 14.2329  (-2.68284  3.54908)
R^2/D10^2   : 0.155797  (-0.084479   0.170835)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.09     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.35e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.656e-09   1.841e-09
25- 50  2.516e-08   6.130e-09
50-150  3.384e-08   1.041e-08
15-150  6.566e-08   1.527e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-96.2785      -199.363)
Norm        : 4.68547       (-0.710206     0.710622)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.44     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.40e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.167e-08   6.625e-09
25- 50  2.244e-08   1.249e-08
50-150  4.922e-08   2.812e-08
15-150  8.333e-08   4.625e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.04568        (-6.98012      3.62708)
R1^2/D10^2  : 0.786328        (-0.523502      148971)
kT2 [keV]   : 30.9024        (-15.5975      150.237)
R2^2/D10^2  : 7.62448E-03    (-0.00724784   0.128602)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.42     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.56e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.120e-08   5.049e-09
25- 50  2.023e-08   7.686e-09
50-150  4.356e-08   1.813e-08
15-150  7.499e-08   2.332e-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: 1.86367     ( -0.0872953   0.0884553 )
Norm@50keV  : 3.31688E-03    ( -0.000162018   0.000160836 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.06     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.94e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 86.19 sec: 0.468834 ( -0.021956  0.022042 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.62825e-06 ( -1.2827e-07  1.28939e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85267     ( -0.327366   0.295336 )
Epeak [keV] : 623.947      ( -768.371 -785.656 )
Norm@50keV  : 3.36109E-03    ( -0.000994354   0.00156786 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.06     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.66e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 86.19 sec: 0.468614 ( -0.024058  0.02193 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.63079e-06 ( -1.53375e-07  1.25518e-07 ) 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)  = 7.58e-07
S(50-100 keV) = 8.33e-07

T90 vs. Hardness ratio plot

T90                                   = 62.6879999637604 sec.
Hardness ratio (energy fluence ratio) = 1.09894

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.06564
Count Ratio (50-100 keV) / (15-25 keV) = 0.633227

Mask shadow pattern

IMX = -2.936154824808744E-01, IMY = -2.826765472614852E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-239.912000 -209.315600
-207.912000 -21.768000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5898  35.1942   56.5  48.6  173.0   0.1608   0.2    0.4	Cyg X-1                       
308.0929  40.9423    5.4  40.1  169.6   1.1210   2.1    1.0	Cyg X-3                       
326.3424  38.3782   40.3  34.7  147.8   0.1385   0.3    8.7	Cyg X-2                       
307.9584  30.3771    2.0  49.1  161.7   5.3281   5.7 ------	UNKNOWN                       
282.1551  64.0652    2.2  34.0 -144.8   2.1113   5.2 ------	UNKNOWN                       
245.6203  59.9726    3.2  48.1 -129.2   5.6360   3.7 ------	UNKNOWN

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

Time interval of the image:
-21.768000 64.424000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6788  35.1510    2.4  48.6  172.9  -1.5290  -4.8    5.3	Cyg X-1                       
308.1926  41.0545    3.0  40.0  169.6   0.7895   3.9    7.2	Cyg X-3                       
326.3579  38.2847    3.2  34.8  147.7   0.6952   3.6    9.0	Cyg X-2                       
341.2076  46.5483    0.4  22.2  136.1   4.5475  31.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
502.588590 962.142000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.3944 -40.5257    7.2  55.2  -26.0  -3.9347  -1.6    6.4	Vela X-1                      
 90.8806  -8.5798    2.8  44.4   40.9   5.2326   4.1 ------	UNKNOWN                       
171.2565  63.1265    3.0  56.8 -179.1  10.0289   3.8 ------	UNKNOWN                       
118.8562 -21.9874    2.4  37.8   -4.4   3.8415   4.8 ------	UNKNOWN

Plot creation:
Sun Mar  1 23:22:27 EST 2026