batgrbproduct analysis for trigger=1429608

batgrbproduct Analysis for Trigger=1429608

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 17:16:53 EST 2026
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1429608
======================================================================

  Trigger: 01429608      Segment: 000

  BAT Trigger Time: 788921827.264   [s; MET]
      Trigger Stop: 788921827.776   [s; MET]
               UTC: 2026-01-01T00:56:30.301900    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 86.4645828560466   Dec: 63.5683887343817  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.02
     Image Trigger?:     NO
     Rate S/N Ratio:     13.3416640641263  [ if not an image trigger ]
     Image S/N Ratio:    8.02

  Flight Position:   [ source = BAT ]
    RA: 86.4645828560466   Dec: 63.5683887343817  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 86.4423023275964   Dec: 63.5825601287919  [deg; J2000]  
        { 05h 45m 46.2s , +63d 34' 57.2" }
         +/- 1.05088290540851 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.346723680927093 [arcmin] (formal 1-sigma fit error)
    SNR: 28.3352131269656
 
  Angular difference between Flight and Ground position is 1.037741 arcmin
 
  Partial Coding Fraction: 0.78125    [ including projection effects ]

  Duration
     T90: 48 +/- 16
        Measured from: -15.2640000581741
                   to: 32.7359999418259     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: 0.735999941825867
                   to: 16.7359999418259     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 24.2359999418259     
                   to: 25.2359999418259     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -31.2640000581741     
                   to: 64.7359999418259     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.122984   2.940823   1.956879   0.466121
           0.065090   0.069287   0.058652   0.045850 [error]
 Peak      0.128632   0.220117   0.180264   0.029184
           0.009134   0.010531   0.009543   0.006061 [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 6.90e-07 1.18e-06 1.55e-06 4.11e-06 4.54e-06 7.54e-06   erg/cm2
              Error 3.90e-08 3.90e-08 6.05e-08 3.58e-07 1.45e-07 3.96e-07   erg/cm2
Peak flux Power-law 1.36e+00 1.48e+00 1.15e+00 1.46e+00 4.53e+00 5.45e+00   ph/cm2/s
              Error 1.26e-01 8.72e-02 7.50e-02 1.91e-01 2.49e-01 3.04e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.44e-07 1.22e-06 1.58e-06 2.57e-06 4.43e-06 6.01e-06   erg/cm2
              Error 4.84e-08 4.45e-08 6.56e-08 7.85e-07 1.65e-07 7.96e-07   erg/cm2
Peak flux Cutoff-PL 1.15e+00 1.60e+00 1.25e+00 6.46e-01 4.40e+00 4.64e+00   ph/cm2/s
              Error 1.51e-01 1.05e-01 9.05e-02 2.16e-01 2.56e-01 3.30e-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    1.612    0.056    -      -           5.07e-03 1.54e-04   61.900 57
CPL   1.277    0.230     111.2   68.6      7.37e-03 1.88e-03   55.190 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.365    0.088    -      -           3.75e-02 2.05e-03   61.690 57
CPL   0.493    0.394      89.5   21.8      1.01e-01 4.58e-02   44.210 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: 28.672000 sec.
T50 in the 50-300 keV band: 19.136000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   96.000  -31.264   64.736
T90    48.000  -15.264   32.736
T50    16.000    0.736   16.736
Peak    1.000   24.236   25.236

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
   86.4423    63.5826   0.0068    21.1272    44.1789         2.6340828     28.335 TRIG_01429608                 
 
Foreground time interval of the image:
-31.264  10.037 (delta_t =  41.301 [sec])
Background time interval of the image:
-239.264 -31.264 (delta_t = 208.000 [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

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

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  -31.264 sec. to   64.736 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61246     ( -0.0560902   0.056224 )
Norm@50keV  : 5.06601E-03    ( -0.000153604   0.000153487 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.90     using 59 bins.
 Reduced chi-squared = 1.08596
# Null hypothesis probability of 3.06e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 96 sec: 0.653565 ( -0.021255  0.021312 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.54214e-06 ( -1.45095e-07  1.45572e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -31.264 sec. to   64.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.27697     ( -0.236082   0.223842 )
Epeak [keV] : 111.228      ( -26.0602 111.094 )
Norm@50keV  : 7.36650E-03    ( -0.00158964   0.00216509 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.19     using 59 bins.
 Reduced chi-squared = 0.985536
# Null hypothesis probability of 5.06e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 96 sec: 0.638655 ( -0.023237  0.023304 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.42386e-06 ( -1.65416e-07  1.64854e-07 ) ergs/cm2

Band function

Time interval is from  -31.264 sec. to   64.736 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]    : 14.7379  (  )
R^2/D10^2   : 7.43855E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  270.01     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.96e-29 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.256e-07   1.973e-08
25- 50  1.273e-06   4.896e-08
50-150  1.867e-06   1.080e-07
15-150  3.465e-06   1.238e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 178.798       (-27.6892      -178.221)
Norm        : 2.64157       (-0.0911377     0.0996856)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.94     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.53e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.400e-07   3.360e-08
25- 50  1.215e-06   8.976e-08
50-150  2.566e-06   6.466e-07
15-150  4.421e-06   6.960e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.93692        (-0.804597      0.831839)
R1^2/D10^2  : 0.461100        (-0.125262      0.193474)
kT2 [keV]   : 28.4542        (-3.50313      4.95238)
R2^2/D10^2  : 5.33599E-03    (-0.00230411   0.00337369)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.75     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.23e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.683e-07   5.050e-08
25- 50  1.269e-06   8.976e-08
50-150  2.576e-06   2.971e-07
15-150  4.414e-06   3.898e-07

Peak spectrum fit

Power-law model

Time interval is from   24.236 sec. to   25.236 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36517     ( -0.0874277   0.0876316 )
Norm@50keV  : 3.74926E-02    ( -0.00204603   0.0020441 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.69     using 59 bins.
 Reduced chi-squared = 1.08228
# Null hypothesis probability of 3.12e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 4.53118 ( -0.24931  0.24948 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.64998e-07 ( -2.1946e-08  2.20546e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   24.236 sec. to   25.236 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.493040     ( -0.411308   0.375943 )
Epeak [keV] : 89.4598      ( -14.0588 29.4647 )
Norm@50keV  : 0.100880    ( -0.0342149   0.0573815 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.21     using 59 bins.
 Reduced chi-squared = 0.789464
# Null hypothesis probability of 8.73e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 4.40245 ( -0.25572  0.25566 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.47744e-07 ( -2.33969e-08  2.34748e-08 ) ergs/cm2

Band function

Time interval is from   24.236 sec. to   25.236 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]    : 16.6367  (-1.05892  1.13673)
R^2/D10^2   : 0.384611  (-0.078067   0.0971975)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   87.11     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.28e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.180e-08   2.215e-09
25- 50  9.481e-08   6.765e-09
50-150  1.860e-07   2.000e-08
15-150  3.026e-07   2.090e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-15.6637      -200)
Norm        : 18.8039       (-1.01657     1.01657)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.40     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.34e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.682e-08   2.475e-09
25- 50  9.006e-08   6.375e-09
50-150  1.975e-07   3.555e-08
15-150  3.344e-07   3.170e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.81391        (-1.37222      1.75271)
R1^2/D10^2  : 3.75398        (-1.88292      4.26332)
kT2 [keV]   : 22.8917        (-2.70197      4.10219)
R2^2/D10^2  : 0.106375    (-0.0506945   0.0667659)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   40.97     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.20e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.733e-08   1.160e-08
25- 50  9.013e-08   1.906e-08
50-150  2.198e-07   4.510e-08
15-150  3.473e-07   6.750e-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: 1.57906     ( -0.0981325   0.0988951 )
Norm@50keV  : 3.98595E-03    ( -0.000225047   0.000224194 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   39.68     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.61e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 41.3 sec: 0.508933 ( -0.0285177  0.0285844 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54362e-06 ( -9.40145e-08  9.45469e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28554     ( -0.418517   0.336485 )
Epeak [keV] : 120.373      ( -44.4038 -120.375 )
Norm@50keV  : 5.62093E-03    ( -0.00176377   0.00345586 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   37.98     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.69e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 41.3 sec: 0.501162 ( -0.030238  0.030219 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.50717e-06 ( -1.06414e-07  1.06054e-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)  = 1.18e-06
S(50-100 keV) = 1.55e-06

T90 vs. Hardness ratio plot

T90                                   = 48 sec.
Hardness ratio (energy fluence ratio) = 1.31356

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.38523
Count Ratio (50-100 keV) / (15-25 keV) = 0.921759

Mask shadow pattern

IMX = 2.771231430046500E-01, IMY = -2.692916768903330E-01

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-239.264000 -31.264000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 90.6558  50.1264    3.1  29.7   69.4   1.8128   3.8 ------	UNKNOWN                       
348.0515  27.6752    2.4  48.0 -129.1   6.7848   4.9 ------	UNKNOWN                       
300.7147  60.2297    3.5  43.8  -64.1   4.4332   3.4 ------	UNKNOWN

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

Time interval of the image:
-31.264000 10.036600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 91.3923  42.0973    2.6  35.8   79.1   0.8611   4.4 ------	UNKNOWN                       
 86.4423  63.5826    0.4  21.1   44.2   2.6340  28.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
67.436600 962.816000
975.736000 1065.866000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6236  21.9901    2.7  41.6  115.2  27.0996   4.2    1.6	Crab                          
350.5505  55.2783    2.7  44.8 -122.3  21.4372   4.3 ------	UNKNOWN                       
353.6636  49.7507    2.1  48.0 -129.1  30.6096   5.5 ------	UNKNOWN                       
255.7607  72.4438    2.7  43.8  -64.1  25.1730   4.3 ------	UNKNOWN

Plot creation:
Sun Mar  1 23:08:51 EST 2026