batgrbproduct analysis for trigger=1403878

batgrbproduct Analysis for Trigger=1403878

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 20:41:37 EST 2026
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1403878
======================================================================

  Trigger: 01403878      Segment: 000

  BAT Trigger Time: 782094546.688   [s; MET]
      Trigger Stop: 782094547.2   [s; MET]
               UTC: 2025-10-14T00:28:30.188100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 111.732320098319   Dec: 6.41506468241977  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.27
     Image Trigger?:     NO
     Rate S/N Ratio:     23.5159520326097  [ if not an image trigger ]
     Image S/N Ratio:    13.27

  Flight Position:   [ source = BAT ]
    RA: 111.732320098319   Dec: 6.41506468241977  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 111.776528263324   Dec: 6.60470316398629  [deg; J2000]  
        { 07h 27m 06.4s , +06d 36' 16.9" }
         +/- 7.78984516074106 [arcmin] (estimated 90% radius based on SNR)
         +/- 5.76112950211683 [arcmin] (formal 1-sigma fit error)
    SNR: 1.61996552571559
 
  Angular difference between Flight and Ground position is 11.679519 arcmin
 
  Partial Coding Fraction: 0.7890625    [ including projection effects ]

  Duration
     T90: 684.683999896049 +/- 641.084936973054
        Measured from: 0.116000056266785
                   to: 684.799999952316     [s; relative to TRIGTIME]
     T50: 478.275999903679 +/- 586.509259662218
        Measured from: 0.688000082969666
                   to: 478.963999986649     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0740000009536743     
                   to: 0.925999999046326     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0719999074935913     
                   to: 796.972000002861     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.512961   1.152372   0.635102   0.254952
           0.189781   0.195232   0.160993   0.130121 [error]
 Peak      0.106667   0.144275   0.082564   0.014806
           0.008568   0.009553   0.007686   0.005250 [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 2.01e-07 3.67e-07 5.16e-07 1.52e-06 1.47e-06 2.61e-06   erg/cm2
              Error 6.99e-08 8.41e-08 1.51e-07 9.26e-07 3.72e-07 1.06e-06   erg/cm2
Peak flux Power-law 1.08e+00 9.46e-01 5.66e-01 5.09e-01 2.82e+00 3.11e+00   ph/cm2/s
              Error 1.28e-01 7.47e-02 6.12e-02 1.05e-01 2.22e-01 2.44e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.71e-07 4.33e-07 5.23e-07 2.54e-07 1.31e-06 1.38e-06   erg/cm2
              Error 8.01e-08 1.21e-07 1.92e-07 8.98e-07 4.02e-07 1.07e-06   erg/cm2
Peak flux Cutoff-PL 9.58e-01 1.05e+00 5.94e-01 1.90e-01 2.74e+00 2.80e+00   ph/cm2/s
              Error 1.50e-01 1.01e-01 7.11e-02 1.18e-01 2.27e-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    1.507    0.363    -      -           1.96e-04 4.53e-05   51.600 57
CPL   0.111    2.067      61.3  -23.5      1.13e-03 1.26e-02   49.570 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.742    0.129    -      -           2.09e-02 1.78e-03   55.210 57
CPL   0.799    0.623      58.8   16.6      6.77e-02 6.03e-02   46.850 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: 0.896000 sec.
T50 in the 50-300 keV band: 0.512000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  797.044   -0.072  796.972
T90   684.684    0.116  684.800
T50   478.276    0.688  478.964
Peak    1.000   -0.074    0.926

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
  111.7765     6.6047   0.1191    17.4904   -82.7168         1.1632581      1.620 TRIG_01403878                 
 
Foreground time interval of the image:
 -0.072 796.972 (delta_t = 797.044 [sec])
Background time interval of the image:
-239.688  -0.072 (delta_t = 239.616 [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 0.512000

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 0.512000

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 0.512000

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   -0.072 sec. to  796.972 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50746     ( -0.360361   0.364857 )
Norm@50keV  : 1.95713E-04    ( -4.55429e-05   4.50284e-05 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.60     using 59 bins.
 Reduced chi-squared = 0.905263
# Null hypothesis probability of 6.77e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 797 sec: 2.44825E-02 ( -0.0055107  0.0055208 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.47818e-06 ( -3.67655e-07  3.75985e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.072 sec. to  796.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.110811     ( -2.47921   1.65426 )
Epeak [keV] : 61.2973      ( -14.3185 -61.2691 )
Norm@50keV  : 1.13035E-03    ( -0.00113293   0.0241594 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.57     using 59 bins.
 Reduced chi-squared = 0.885179
# Null hypothesis probability of 7.15e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 797 sec: 2.34535E-02 ( -0.0056394  0.0056692 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.3083e-06 ( -3.77431e-07  4.25857e-07 ) ergs/cm2

Band function

Time interval is from   -0.072 sec. to  796.972 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]    : 13.4313  (-2.91555  3.92425)
R^2/D10^2   : 4.30508E-03  (-0.00261142   0.00605916)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.99     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.99e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.311e-07   5.666e-08
25- 50  4.676e-07   1.841e-07
50-150  5.433e-07   2.815e-07
15-150  1.142e-06   4.747e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 198.556       (-123.008      -198.186)
Norm        : 0.101234       (-0.0225376     0.0281008)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.77     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.07e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.010e-07   1.218e-07
25- 50  3.865e-07   2.225e-07
50-150  8.465e-07   4.898e-07
15-150  1.434e-06   8.161e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.77916        (-7.86396      -7.86396)
R1^2/D10^2  : 1.54396E-02        (-0.0149229      -0.0149229)
kT2 [keV]   : 20.1827        (-21.3629      -21.3629)
R2^2/D10^2  : 6.94679E-04    (-0.000503214   0.00679652)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.27     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.92e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.751e-07   1.105e-07
25- 50  4.366e-07   3.011e-07
50-150  7.088e-07   3.952e-07
15-150  1.321e-06   7.125e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.074 sec. to    0.926 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.74201     ( -0.126958   0.130206 )
Norm@50keV  : 2.08805E-02    ( -0.00178701   0.00177021 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.21     using 59 bins.
 Reduced chi-squared = 0.968596
# Null hypothesis probability of 5.42e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.81526 ( -0.22163  0.22173 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.92792e-07 ( -1.69875e-08  1.7131e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.074 sec. to    0.926 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.799420     ( -0.667487   0.577603 )
Epeak [keV] : 58.7755      ( -9.51136 23.7728 )
Norm@50keV  : 6.76749E-02    ( -0.0342666   0.0864234 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.85     using 59 bins.
 Reduced chi-squared = 0.836607
# Null hypothesis probability of 8.03e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.74305 ( -0.22685  0.2265 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.81147e-07 ( -1.81911e-08  1.85033e-08 ) ergs/cm2

Band function

Time interval is from   -0.074 sec. to    0.926 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]    : 12.4052  (-1.05386  1.15393)
R^2/D10^2   : 0.631139  (-0.177411   0.243693)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   69.89     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.17e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.058e-08   3.115e-09
25- 50  6.732e-08   5.935e-09
50-150  6.365e-08   1.009e-08
15-150  1.516e-07   1.455e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 113.809       (-28.7217      42.4903)
Norm        : 12.1884       (-1.17788     1.41402)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.75     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.74e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.180e-08   3.795e-09
25- 50  5.637e-08   5.760e-09
50-150  9.795e-08   3.443e-08
15-150  1.861e-07   4.070e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.47788        (-2.25747      1.46993)
R1^2/D10^2  : 3.67363        (-2.23524      12.3791)
kT2 [keV]   : 18.8821        (-4.03428      10.9749)
R2^2/D10^2  : 9.77449E-02    (-0.0820976   0.179151)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.85     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.42e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.955e-08   1.412e-08
25- 50  5.948e-08   2.425e-08
50-150  8.934e-08   4.587e-08
15-150  1.784e-07   6.134e-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: 1.50746     ( -0.360361   0.364857 )
Norm@50keV  : 1.95713E-04    ( -4.55429e-05   4.50284e-05 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.60     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.77e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 797 sec: 2.44819E-02 ( -0.00551046  0.00552046 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.47798e-06 ( -3.67373e-07  3.76661e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.109192     ( -2.4788   1.6557 )
Epeak [keV] : 61.2681      ( -14.2242 -61.2672 )
Norm@50keV  : 1.13289E-03    ( -0.00113297   0.0241509 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.57     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.15e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 797 sec: 2.34515E-02 ( -0.0056386  0.0056495 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.30871e-06 ( -3.77587e-07  4.27057e-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)  = 3.67e-07
S(50-100 keV) = 5.16e-07

T90 vs. Hardness ratio plot

T90                                   = 684.683999896049 sec.
Hardness ratio (energy fluence ratio) = 1.40599

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.24651
Count Ratio (50-100 keV) / (15-25 keV) = 1.23811

Mask shadow pattern

IMX = 3.994837969108041E-02, IMY = 3.125725581834870E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:
-239.688000 -0.072000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6088  22.0164    0.4  16.5  143.0   9.2136  26.3    1.4	Crab                          
107.0703  14.2099    3.2  13.5 -113.1   1.2943   3.6 ------	UNKNOWN                       
114.3146 -17.3479    2.4  33.0  -36.5   2.1835   4.8 ------	UNKNOWN                       
120.0465  38.6119    3.1  37.5 -145.8   1.9424   3.7 ------	UNKNOWN                       
122.9397  44.8877    2.3  43.5 -150.1   3.1721   4.9 ------	UNKNOWN                       
135.4481   6.0713    2.8  40.9  -88.5   6.6785   4.2 ------	UNKNOWN

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

Time interval of the image:
-0.072000 796.972000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.4783  21.9434   16.7  16.5  142.5   0.4454   0.7    9.6	Crab

Post-slew image of 15-350 keV band

Time interval of the image:
957.712600 962.382400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.7366 -40.6902    0.0  11.7  117.4  -0.0367  -1.4   12.5	Vela X-1                      
170.2963 -60.6278  547.8  19.9  -14.3   0.0005   0.0    0.6	Cen X-3                       
186.8908 -62.8211    3.8  27.6  -21.1   0.0808   3.0    7.1	GX 301-2                      
105.4296 -24.1911    2.3  41.9  117.7   0.5159   5.0 ------	UNKNOWN                       
 96.2284 -69.6755    2.4  36.9   42.4   0.2242   4.7 ------	UNKNOWN

Plot creation:
Sun Mar  1 23:17:57 EST 2026