batgrbproduct analysis for trigger=1329888

batgrbproduct Analysis for Trigger=1329888

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 05:00:52 EST 2026
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1329888
======================================================================

  Trigger: 01329888      Segment: 000

  BAT Trigger Time: 773183239.168   [s; MET]
      Trigger Stop: 773183240.192   [s; MET]
               UTC: 2025-07-02T21:06:43.274520    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 212.93254740976   Dec: 16.69933155287  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.51
     Image Trigger?:     NO
     Rate S/N Ratio:     16.3401346383682  [ if not an image trigger ]
     Image S/N Ratio:    8.51

  Flight Position:   [ source = BAT ]
    RA: 212.93254740976   Dec: 16.69933155287  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 212.941451337569   Dec: 16.7405249326086  [deg; J2000]  
        { 14h 11m 45.9s , +16d 44' 25.9" }
         +/- 1.01505121036415 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.398616964672329 [arcmin] (formal 1-sigma fit error)
    SNR: 29.7748700783992
 
  Angular difference between Flight and Ground position is 2.524006 arcmin
 
  Partial Coding Fraction: 0.8125    [ including projection effects ]

  Duration
     T90: 63.9160000085831 +/- 12.3350459017648
        Measured from: -11.9880000352859
                   to: 51.9279999732971     [s; relative to TRIGTIME]
     T50: 33.3079999685287 +/- 1.14866875119795
        Measured from: 5.39999997615814
                   to: 38.7079999446869     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 37.3639999628067     
                   to: 38.3639999628067     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -29.1280000209808     
                   to: 76.5479999780655     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.104338   2.775959   2.095713   0.659056
           0.067482   0.071261   0.061777   0.051684 [error]
 Peak      0.131401   0.225272   0.206966   0.085537
           0.008559   0.010285   0.010183   0.007890 [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 6.22e-07 1.16e-06 1.68e-06 5.16e-06 4.78e-06 8.63e-06   erg/cm2
              Error 3.94e-08 4.15e-08 6.46e-08 4.68e-07 1.56e-07 4.99e-07   erg/cm2
Peak flux Power-law 1.23e+00 1.54e+00 1.40e+00 2.22e+00 4.94e+00 6.39e+00   ph/cm2/s
              Error 1.21e-01 9.07e-02 8.22e-02 2.82e-01 2.51e-01 3.52e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.31e-07 1.16e-06 1.67e-06 5.49e-06 4.81e-06 8.37e-06   erg/cm2
              Error 3.94e-08 4.15e-08 6.47e-08 -------- 1.56e-07 5.61e-07   erg/cm2
Peak flux Cutoff-PL 8.24e-01 6.36e-01 3.44e-01 3.26e-01 1.94e+00 2.13e+00   ph/cm2/s
              Error 1.55e-01 8.47e-02 2.37e-02 5.26e-02 2.27e-01 1.78e-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    1.469    0.061    -      -           4.74e-03 1.44e-04   54.390 57
CPL   1.466    0.061    10000.0    0.0      4.76e-03 1.45e-04   54.490 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.137    0.090    -      -           4.24e-02 2.12e-03   47.540 57
CPL   1.040    0.246     542.1    0.0      4.71e-02 1.36e-02   47.290 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: 60.608000 sec.
T50 in the 50-300 keV band: 31.616000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  105.676  -29.128   76.548
T90    63.916  -11.988   51.928
T50    33.308    5.400   38.708
Peak    1.000   37.364   38.364

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
  212.9415    16.7405   0.0065    26.6669  -148.5435         2.8690472     29.775 TRIG_01329888                 
 
Foreground time interval of the image:
-29.128  13.133 (delta_t =  42.261 [sec])
Background time interval of the image:
-179.267 -29.128 (delta_t = 150.139 [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  -29.128 sec. to   76.548 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46882     ( -0.0607689   0.0607105 )
Norm@50keV  : 4.74032E-03    ( -0.000144384   0.000144368 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.39     using 59 bins.
 Reduced chi-squared = 0.954211
# Null hypothesis probability of 5.74e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 105.7 sec: 0.586968 ( -0.019679  0.019809 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.77909e-06 ( -1.5597e-07  1.56228e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -29.128 sec. to   76.548 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.46607     ( -0.0653829   0.0571548 )
Epeak [keV] : 1.00000E+04      ( -10000 -10000 )
Norm@50keV  : 4.75517E-03    ( -0.00014501   0.00014472 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.49     using 59 bins.
 Reduced chi-squared = 0.973036
# Null hypothesis probability of 5.32e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 105.7 sec: 0.586852 ( -0.019713  0.019784 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.80845e-06 ( -1.86504e-07  1.25615e-07 ) ergs/cm2

Band function

Time interval is from  -29.128 sec. to   76.548 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]    : 16.8267  (  )
R^2/D10^2   : 4.24081E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  363.30     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.57e-46 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.592e-07   1.786e-08
25- 50  1.137e-06   4.862e-08
50-150  2.292e-06   1.327e-07
15-150  3.688e-06   1.406e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-8.76736      -200)
Norm        : 2.41080       (-0.073674     0.073674)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   78.20     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.27e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.347e-07   2.209e-08
25- 50  1.221e-06   4.017e-08
50-150  2.678e-06   8.826e-08
15-150  4.533e-06   1.480e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.80801        (-0.729888      0.772837)
R1^2/D10^2  : 0.447652        (-0.123453      0.18533)
kT2 [keV]   : 36.1282        (-4.70611      6.78513)
R2^2/D10^2  : 2.73689E-03    (-0.0010914   0.00152311)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.10     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.71e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.643e-07   5.491e-08
25- 50  1.205e-06   8.879e-08
50-150  3.105e-06   3.404e-07
15-150  4.874e-06   3.589e-07

Peak spectrum fit

Power-law model

Time interval is from   37.364 sec. to   38.364 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13744     ( -0.0896675   0.0893529 )
Norm@50keV  : 4.23887E-02    ( -0.00211581   0.0021158 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.54     using 59 bins.
 Reduced chi-squared = 0.834035
# Null hypothesis probability of 8.10e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 4.93619 ( -0.251  0.25115 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.38077e-07 ( -2.49249e-08  2.50499e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   37.364 sec. to   38.364 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.04011     ( -0.351778   0.140308 )
Epeak [keV] : 542.129      ( -542.14 -542.14 )
Norm@50keV  : 4.70730E-02    ( -0.006367   0.0209057 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.29     using 59 bins.
 Reduced chi-squared = 0.844464
# Null hypothesis probability of 7.90e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.93527 ( -0.25331  0.20166 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.35512e-07 ( -2.66187e-08  2.63157e-08 ) ergs/cm2

Band function

Time interval is from   37.364 sec. to   38.364 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]    : 19.5059  (  )
R^2/D10^2   : 0.248947  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  128.17     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.14e-07 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.844e-08   1.905e-09
25- 50  9.031e-08   6.100e-09
50-150  2.538e-07   2.135e-08
15-150  3.625e-07   2.200e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-7.76392      -200)
Norm        : 20.0676       (-1.02923     1.02923)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  104.62     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.23e-04 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.996e-08   2.745e-09
25- 50  9.610e-08   6.805e-09
50-150  2.108e-07   4.065e-08
15-150  3.568e-07   1.990e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.59812        (-1.65169      1.85295)
R1^2/D10^2  : 2.10605        (-0.895625      1.94466)
kT2 [keV]   : 36.2370        (-7.0234      14.0513)
R2^2/D10^2  : 2.88764E-02    (-0.0176726   0.0290505)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.69     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.13e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.479e-08   7.040e-09
25- 50  9.308e-08   1.731e-08
50-150  3.111e-07   8.040e-08
15-150  4.390e-07   1.092e-07

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: 1.55401     ( -0.0908868   0.0911321 )
Norm@50keV  : 4.71657E-03    ( -0.000231648   0.000230652 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.58     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.15e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 42.26 sec: 0.597784 ( -0.0299852  0.030103 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.87538e-06 ( -9.96499e-08  1.00112e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54933     ( -0.118693   0.0923712 )
Epeak [keV] : 9999.28      ( -9999.36 -9999.36 )
Norm@50keV  : 4.72765E-03    ( -0.000225842   0.00116323 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.61     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.82e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 42.26 sec: 0.597563 ( -0.030015  0.030025 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.87353e-06 ( -9.74389e-08  9.92899e-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)  = 1.16e-06
S(50-100 keV) = 1.68e-06

T90 vs. Hardness ratio plot

T90                                   = 63.9160000085831 sec.
Hardness ratio (energy fluence ratio) = 1.44828

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.31916
Count Ratio (50-100 keV) / (15-25 keV) = 0.995901

Mask shadow pattern

IMX = -4.284147928941399E-01, IMY = 2.620859655052169E-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:
-179.267370 -29.128000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9675 -15.6568    2.0  41.9  128.8   4.7020   5.7    1.2	Sco X-1                       
254.5378  35.2546   20.0  15.7    6.1   0.1279   0.6    6.6	Her X-1                       
268.4631  -1.3841    6.0  38.8   86.5  -1.7863  -1.9    7.0	SW J1753.5-0127               
299.5911  35.1640    1.4  51.5   20.6   6.4998   8.1    2.3	Cyg X-1                       
234.3407 -13.1807    2.0  39.5  144.7   2.9489   5.7 ------	UNKNOWN

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

Time interval of the image:
-29.128000 13.132600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
245.1535 -15.6035   14.3  41.8  128.6   0.2217   0.8   10.3	Sco X-1                       
254.6159  35.4210   11.7  15.8    5.7  -0.0791  -1.0    9.1	Her X-1                       
268.3219  -1.5113    3.6  38.8   86.8  -1.0685  -3.2    4.5	SW J1753.5-0127               
299.4729  35.1154    5.5  51.4   20.7  -0.8188  -2.1    7.7	Cyg X-1                       
292.9321  46.4482    2.5  46.4    5.6   0.8217   4.7 ------	UNKNOWN                       
212.9415  16.7405    0.4  26.7 -148.5   2.8691  29.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
76.132600 514.232610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4746  35.4036    9.6  41.3   26.7   1.0895   1.2    3.8	Her X-1                       
230.0134 -17.4646    2.4  38.1  124.7   6.6439   4.8 ------	UNKNOWN                       
214.9133   4.2610    3.0  12.6  142.7   2.0586   3.9 ------	UNKNOWN                       
179.0573 -19.2865    2.8  49.0 -164.1   5.9674   4.1 ------	UNKNOWN                       
176.7952 -15.0649    2.8  47.8 -158.0   5.4543   4.2 ------	UNKNOWN                       
167.5853   9.1624    2.8  44.7 -122.1  10.3368   4.2 ------	UNKNOWN

Plot creation:
Sun Mar  1 23:36:42 EST 2026