batgrbproduct analysis for trigger=1340514

batgrbproduct Analysis for Trigger=1340514

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 03:43:45 EST 2026
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1340514
======================================================================

  Trigger: 01340514      Segment: 000

  BAT Trigger Time: 776256404.544   [s; MET]
      Trigger Stop: 776256405.568   [s; MET]
               UTC: 2025-08-07T10:46:08.440980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 51.4200250231075   Dec: -47.8774784688358  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    19.67
     Image Trigger?:     NO
     Rate S/N Ratio:     139.046754726603  [ if not an image trigger ]
     Image S/N Ratio:    19.67

  Flight Position:   [ source = BAT ]
    RA: 51.4200250231075   Dec: -47.8774784688358  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 51.4346393987579   Dec: -47.8813581841773  [deg; J2000]  
        { 03h 25m 44.3s , -47d 52' 52.9" }
         +/- 0.563237691489397 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.171526914610606 [arcmin] (formal 1-sigma fit error)
    SNR: 69.0673956591343
 
  Angular difference between Flight and Ground position is 0.632500 arcmin
 
  Partial Coding Fraction: 0.7265625    [ including projection effects ]

  Duration
     T90: 75.7079999446869 +/- 1.28523923515675
        Measured from: -0.568000078201294
                   to: 75.1399998664856     [s; relative to TRIGTIME]
     T50: 32.5599999427795 +/- 0.36734731273279
        Measured from: 6.07999992370605
                   to: 38.6399998664856     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 33.8159999847412     
                   to: 34.8159999847412     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -19.4960000514984     
                   to: 126.223999977112     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     8.547310  12.864242  11.741480   3.937002
           0.091935   0.101685   0.093639   0.072899 [error]
 Peak      0.372082   0.674445   0.768442   0.306465
           0.013137   0.016806   0.018079   0.014616 [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 2.61e-06 5.49e-06 9.06e-06 3.38e-05 2.49e-05 5.10e-05   erg/cm2
              Error 8.66e-08 1.07e-07 1.25e-07 1.14e-06 3.31e-07 1.14e-06   erg/cm2
Peak flux Power-law 3.46e+00 4.85e+00 5.04e+00 9.63e+00 1.64e+01 2.30e+01   ph/cm2/s
              Error 2.16e-01 1.79e-01 1.48e-01 6.52e-01 4.66e-01 7.08e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.61e-06 5.49e-06 8.98e-06 3.61e-05 2.51e-05 5.08e-05   erg/cm2
              Error 8.67e-08 1.07e-07 1.25e-07 -------- 3.30e-07 9.81e-07   erg/cm2
Peak flux Cutoff-PL -------- -------- -------- 5.68e-01 -------- 5.69e-01   ph/cm2/s
              Error -------- -------- -------- 0.00e+00 -------- 0.00e+00   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    1.278    0.026    -      -           1.73e-02 2.51e-04   37.800 57
CPL   1.275    0.026    9999.0    0.0      1.73e-02 3.48e-04   38.060 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.944    0.052    -      -           1.43e-01 4.00e-03   51.470 57
CPL   0.937    0.053    9999.4    0.0      1.43e-01 7.34e-03   51.690 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: 56.320000 sec.
T50 in the 50-300 keV band: 32.576000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  145.720  -19.496  126.224
T90    75.708   -0.568   75.140
T50    32.560    6.080   38.640
Peak    1.000   33.816   34.816

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
   51.4346   -47.8814   0.0028    34.6519  -174.9311        12.0263696     69.067 TRIG_01340514                 
 
Foreground time interval of the image:
-19.496  11.757 (delta_t =  31.253 [sec])
Background time interval of the image:
-239.544 -19.496 (delta_t = 220.048 [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  -19.496 sec. to  126.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27848     ( -0.0262376   0.0261389 )
Norm@50keV  : 1.72575E-02    ( -0.000251223   0.000250369 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   37.80     using 59 bins.
 Reduced chi-squared = 0.663158
# Null hypothesis probability of 9.77e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 145.7 sec: 2.05094 ( -0.03467  0.0348 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.49827e-05 ( -3.30891e-07  3.31186e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -19.496 sec. to  126.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27512     ( -0.0277118   0.0251451 )
Epeak [keV] : 9999.02      ( -9999.17 -9999.17 )
Norm@50keV  : 1.73355E-02    ( -0.000236587   0.000459341 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   38.06     using 59 bins.
 Reduced chi-squared = 0.679643
# Null hypothesis probability of 9.68e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 145.7 sec: 2.05003 ( -0.03465  0.01989 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.506e-05 ( -4.12083e-07  2.4872e-07 ) ergs/cm2

Band function

Time interval is from  -19.496 sec. to  126.224 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]    : 22.8747  (  )
R^2/D10^2   : 5.68256E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                 1207.20     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.91e-215 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.872e-07   2.280e-08
25- 50  4.258e-06   9.835e-08
50-150  1.664e-05   2.914e-07
15-150  2.169e-05   3.133e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 9.13183       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  561.01     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.05e-84 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.313e-06   5.537e-08
25- 50  6.373e-06   1.071e-07
50-150  1.398e-05   2.171e-07
15-150  2.366e-05   3.715e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.53846        (-0.461572      0.482823)
R1^2/D10^2  : 0.971835        (-0.167548      0.210755)
kT2 [keV]   : 36.5448        (-1.81367      2.11277)
R2^2/D10^2  : 1.05034E-02    (-0.00174427   0.00191775)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.92     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.40e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.232e-06   1.311e-07
25- 50  5.675e-06   1.537e-07
50-150  1.709e-05   3.788e-07
15-150  2.500e-05   5.172e-07

Peak spectrum fit

Power-law model

Time interval is from   33.816 sec. to   34.816 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.943855     ( -0.0522795   0.0519865 )
Norm@50keV  : 0.142698    ( -0.00400704   0.00399057 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.47     using 59 bins.
 Reduced chi-squared = 0.902982
# Null hypothesis probability of 6.82e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 16.3915 ( -0.4653  0.4663 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57511e-06 ( -4.69107e-08  4.69242e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   33.816 sec. to   34.816 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.936544     ( -0.052009   0.053351 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 0.143296    ( -0.00394265   0.0107463 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.69     using 59 bins.
 Reduced chi-squared = 0.923036
# Null hypothesis probability of 6.39e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.00997e-07 ( -4.98812e-08  3.57857e-08 ) ergs/cm2

Band function

Time interval is from   33.816 sec. to   34.816 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]    : 24.8574  (  )
R^2/D10^2   : 0.402456  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  331.23     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.62e-40 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.333e-08   2.570e-09
25- 50  2.451e-07   1.100e-08
50-150  1.124e-06   5.100e-08
15-150  1.412e-06   5.050e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 67.2538       (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  440.40     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.25e-60 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.675e-07   5.100e-09
25- 50  3.222e-07   9.250e-09
50-150  7.065e-07   2.020e-08
15-150  1.196e-06   3.300e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.03666        (-0.837166      0.933721)
R1^2/D10^2  : 7.80494        (-2.33697      3.54734)
kT2 [keV]   : 40.9042        (-3.92043      5.26873)
R2^2/D10^2  : 8.23994E-02    (-0.0235758   0.027894)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.99     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.56e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.090e-07   1.249e-08
25- 50  2.815e-07   2.040e-08
50-150  1.224e-06   7.950e-08
15-150  1.614e-06   8.750e-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: 1.11156     ( -0.0340794   0.033915 )
Norm@50keV  : 2.59788E-02    ( -0.00049197   0.000490272 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   32.54     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.96e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 31.25 sec: 3.01691 ( -0.0614509  0.0614278 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.45691e-06 ( -1.53537e-07  1.53574e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.10584     ( -0.0173407   0.0342386 )
Epeak [keV] : 9998.15      ( -9998.07 -9998.07 )
Norm@50keV  : 2.61152E-02    ( -0.000466321   0.0034548 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   32.53     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.95e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 31.25 sec: 3.01517 ( -0.03486  0.06156 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.46353e-06 ( -1.49938e-07  1.50375e-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)  = 5.49e-06
S(50-100 keV) = 9.06e-06

T90 vs. Hardness ratio plot

T90                                   = 75.7079999446869 sec.
Hardness ratio (energy fluence ratio) = 1.65027

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.50506
Count Ratio (50-100 keV) / (15-25 keV) = 1.3737

Mask shadow pattern

IMX = -6.884875963893101E-01, IMY = 6.106871736789070E-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:
-239.544000 -19.496000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.3625 -60.6333    7.3  36.8  -54.7   0.8357   1.6    1.5	Cen X-3                       
186.7079 -62.8044    3.0  35.5  -41.2   1.6896   3.8    2.5	GX 301-2                      
264.8670 -44.3835   13.7  50.3   26.6   0.7911   0.8    6.6	4U 1735-44                    
324.0916 -45.7058    2.9  40.6   83.8   5.1904   3.9 ------	UNKNOWN                       
321.3776 -54.7395    2.8  32.2   77.5   2.4903   4.1 ------	UNKNOWN

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

Time interval of the image:
-19.496000 11.756600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.6262 -60.6902    4.9  36.7  -54.5  -0.5686  -2.4   10.0	Cen X-3                       
186.7781 -62.7559   10.6  35.5  -41.2  -0.2097  -1.1    3.4	GX 301-2                      
264.8466 -44.3855    6.7  50.3   26.5  -1.0950  -1.7    5.9	4U 1735-44                    
307.7108 -47.2306    2.4  41.5   66.5   2.7614   4.8 ------	UNKNOWN                       
 51.4346 -47.8814    0.2  34.7 -174.9  12.0260  69.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
88.956600 962.598000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 32.3469 -19.4757    2.7  32.3  158.8   6.5569   4.2 ------	UNKNOWN                       
114.4831 -40.6334    3.1  44.5  -61.0  19.3691   3.7 ------	UNKNOWN                       
 76.4816  -3.5310    2.4  49.3 -132.1  24.6192   4.8 ------	UNKNOWN

Plot creation:
Sun Mar  1 23:33:47 EST 2026