batgrbproduct analysis for trigger=1443066

batgrbproduct Analysis for Trigger=1443066

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 16:29:03 EST 2026
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1443066
======================================================================

  Trigger: 01443066      Segment: 000

  BAT Trigger Time: 790816427.136   [s; MET]
      Trigger Stop: 790816431.232   [s; MET]
               UTC: 2026-01-22T23:13:10.045840    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 336.078646777855   Dec: -59.1675773421642  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.35
     Image Trigger?:     NO
     Rate S/N Ratio:     11.4455231422596  [ if not an image trigger ]
     Image S/N Ratio:    9.35

  Flight Position:   [ source = BAT ]
    RA: 336.078646777855   Dec: -59.1675773421642  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 336.086693682091   Dec: -59.1702262301841  [deg; J2000]  
        { 22h 24m 20.8s , -59d 10' 12.8" }
         +/- 1.54925638065146 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.555276764883308 [arcmin] (formal 1-sigma fit error)
    SNR: 16.2747256051602
 
  Angular difference between Flight and Ground position is 0.294091 arcmin
 
  Partial Coding Fraction: 0.5703125    [ including projection effects ]

  Duration
     T90: 21.6159999370575 +/- 5.7445598629437
        Measured from: -3.91200006008148
                   to: 17.703999876976     [s; relative to TRIGTIME]
     T50: 7.09200000762939 +/- 1.78370393988975
        Measured from: 2.94799995422363
                   to: 10.039999961853     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.46399998664856     
                   to: 9.46399998664856     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.96000003814697     
                   to: 20.0799999237061     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.422631   0.565626   0.499672   0.199112
           0.053575   0.063531   0.051361   0.055706 [error]
 Peak      0.049502   0.072179   0.058960   0.012615
           0.010913   0.013063   0.010259   0.011217 [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 1.17e-07 2.41e-07 3.89e-07 1.40e-06 1.08e-06 2.15e-06   erg/cm2
              Error 2.28e-08 2.85e-08 5.24e-08 4.15e-07 1.31e-07 4.51e-07   erg/cm2
Peak flux Power-law 4.59e-01 5.20e-01 4.22e-01 5.71e-01 1.61e+00 1.97e+00   ph/cm2/s
              Error 1.42e-01 1.02e-01 8.59e-02 2.37e-01 2.88e-01 3.56e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.15e-07 2.44e-07 3.92e-07 1.19e-06 1.07e-06 1.94e-06   erg/cm2
              Error 2.43e-08 3.31e-08 5.55e-08 5.34e-07 1.41e-07 5.57e-07   erg/cm2
Peak flux Cutoff-PL 3.89e-01 5.62e-01 4.59e-01 2.51e-01 1.57e+00 1.66e+00   ph/cm2/s
              Error 1.69e-01 1.24e-01 1.03e-01 3.31e-01 2.96e-01 4.31e-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    1.313    0.187    -      -           4.04e-03 4.38e-04   71.930 57
CPL   1.215    0.512     403.9    0.0      4.53e-03 3.95e-03   71.870 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.301    0.286    -      -           1.35e-02 2.36e-03   51.390 57
CPL   0.435    1.248      93.7  -30.7      3.60e-02 9.06e-02   49.720 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: 7.488000 sec.
T50 in the 50-300 keV band: 4.032000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   27.040   -6.960   20.080
T90    21.616   -3.912   17.704
T50     7.092    2.948   10.040
Peak    1.000    8.464    9.464

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
  336.0867   -59.1702   0.0118    28.1929  -122.9545         1.9599230     16.275 TRIG_01443066                 
 
Foreground time interval of the image:
 -6.960  20.080 (delta_t =  27.040 [sec])
Background time interval of the image:
-239.136  -6.960 (delta_t = 232.176 [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 4.096000

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 4.096000

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 4.096000

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   -6.960 sec. to   20.080 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31281     ( -0.188869   0.185914 )
Norm@50keV  : 4.04244E-03    ( -0.000439065   0.000437936 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   71.93     using 59 bins.
 Reduced chi-squared = 1.26193
# Null hypothesis probability of 8.79e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 27.04 sec: 0.483436 ( -0.053367  0.053428 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.07695e-06 ( -1.3009e-07  1.31242e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -6.960 sec. to   20.080 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21462     ( -0.753511   0.27019 )
Epeak [keV] : 403.932      ( -403.961 -403.961 )
Norm@50keV  : 4.53496E-03    ( -0.00178552   0.00610902 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   71.87     using 59 bins.
 Reduced chi-squared = 1.28339
# Null hypothesis probability of 7.50e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 27.04 sec: 0.481745 ( -0.027386  0.05428 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0686e-06 ( -1.43019e-07  1.39089e-07 ) ergs/cm2

Band function

Time interval is from   -6.960 sec. to   20.080 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]    : 16.7088  (-2.3801  2.98272)
R^2/D10^2   : 3.88805E-02  (-0.0166452   0.0274262)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   93.97     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.49e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.005e-08   1.384e-08
25- 50  2.620e-07   4.893e-08
50-150  5.194e-07   1.096e-07
15-150  8.415e-07   1.279e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-40.2098      -200)
Norm        : 2.00021       (-0.217673     0.217673)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   76.23     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.53e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.347e-07   7.417e-08
25- 50  2.590e-07   1.418e-07
50-150  5.681e-07   3.132e-07
15-150  9.618e-07   5.240e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.41161        (-2.05113      2.6372)
R1^2/D10^2  : 0.394530        (-0.24067      0.477796)
kT2 [keV]   : 31.3574        (-8.73329      27.1356)
R2^2/D10^2  : 3.94046E-03    (-0.00326373   0.00792813)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   70.52     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.75e-02 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.155e-07   6.088e-08
25- 50  2.520e-07   1.164e-07
50-150  7.134e-07   3.650e-07
15-150  1.081e-06   4.561e-07

Peak spectrum fit

Power-law model

Time interval is from    8.464 sec. to    9.464 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30144     ( -0.289663   0.282276 )
Norm@50keV  : 1.34965E-02    ( -0.00235774   0.00235268 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.39     using 59 bins.
 Reduced chi-squared = 0.901579
# Null hypothesis probability of 6.85e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.61061 ( -0.2874  0.28807 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.33337e-07 ( -2.53653e-08  2.56348e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    8.464 sec. to    9.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.435065     ( -1.50482   0.990252 )
Epeak [keV] : 93.7374      ( -32.3033 -93.7367 )
Norm@50keV  : 3.60287E-02    ( -0.0360292   0.145101 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.72     using 59 bins.
 Reduced chi-squared = 0.887857
# Null hypothesis probability of 7.10e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.56688 ( -0.29686  0.29542 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.61721e-08 ( -1.73935e-08  9.64664e-09 ) ergs/cm2

Band function

Time interval is from    8.464 sec. to    9.464 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]    : 17.3209  (-3.20128  4.29654)
R^2/D10^2   : 0.120560  (-0.0648201   0.125519)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.62     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.03e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.327e-09   2.425e-09
25- 50  3.290e-08   1.001e-08
50-150  7.089e-08   2.703e-08
15-150  1.111e-07   3.954e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-69.595      -200)
Norm        : 6.71664       (-1.17738     1.17738)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.63     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.39e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.673e-08   9.580e-09
25- 50  3.218e-08   1.845e-08
50-150  7.056e-08   4.001e-08
15-150  1.195e-07   6.795e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.35065        (-5.92257      53.5106)
R1^2/D10^2  : 0.972292        (-0.856762      3271.43)
kT2 [keV]   : 23.8516        (-7.52886      64.6385)
R2^2/D10^2  : 3.35227E-02    (-0.033016   0.0720676)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.62     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.79e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.225e-08   7.225e-09
25- 50  3.209e-08   1.709e-08
50-150  8.230e-08   4.835e-08
15-150  1.267e-07   6.600e-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: 1.31281     ( -0.188869   0.185914 )
Norm@50keV  : 4.04244E-03    ( -0.000439065   0.000437936 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   71.93     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.79e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 27.04 sec: 0.483430 ( -0.0533647  0.0534261 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.07682e-06 ( -1.3007e-07  1.31244e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21462     ( -0.753511   0.270189 )
Epeak [keV] : 403.953      ( -403.961 -403.961 )
Norm@50keV  : 4.53493E-03    ( -0.00178537   0.00610904 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   71.87     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.50e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 27.04 sec: 0.481697 ( -0.027348  0.027348 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06905e-06 ( -1.43098e-07  7.0788e-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)  = 2.41e-07
S(50-100 keV) = 3.89e-07

T90 vs. Hardness ratio plot

T90                                   = 21.6159999370575 sec.
Hardness ratio (energy fluence ratio) = 1.61411

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.33834
Count Ratio (50-100 keV) / (15-25 keV) = 1.18229

Mask shadow pattern

IMX = -2.915887081181138E-01, IMY = 4.497880771929477E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-239.136000 -6.960000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
114.4311 -62.4506    2.9  47.7  145.5  23.0184   4.0 ------	UNKNOWN                       
359.5143 -10.1481    2.8  44.5  -30.4  12.4990   4.1 ------	UNKNOWN

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

Time interval of the image:
-6.960000 20.080000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 23.9744  -9.4682    2.1  40.5    5.2   0.7392   5.4 ------	UNKNOWN                       
 33.9577 -62.0804    2.3  13.4  162.4   0.4380   5.1 ------	UNKNOWN                       
 20.8117   6.2190    2.1  56.3    1.2   2.4907   5.4 ------	UNKNOWN                       
336.0867 -59.1702    0.7  28.2 -123.0   1.9599  16.3 ------	UNKNOWN                       
344.4340 -33.3731    2.0  33.0  -70.4   0.9154   5.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
273.164600 482.924700
540.864000 962.919100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.7242 -40.6468    9.2  38.6  113.3   4.7023   1.3   10.5	Vela X-1                      
170.4317 -60.6127   10.2  28.7  164.4   1.8024   1.1    3.5	Cen X-3                       
186.9456 -62.7994    6.1  30.9 -179.9   2.8787   1.9    8.1	GX 301-2                      
130.2798 -39.7564    2.7  38.4  106.4  16.2017   4.3 ------	UNKNOWN                       
 66.5068 -25.2498    2.9  52.1   28.1  14.3397   3.9 ------	UNKNOWN                       
182.0227 -41.4413    2.2  49.1  161.8  19.9752   5.3 ------	UNKNOWN                       
 93.7659 -54.4409    2.6  20.6   58.5   5.7040   4.5 ------	UNKNOWN                       
 57.6084 -42.1666    2.9  37.1   12.5   7.0019   4.0 ------	UNKNOWN                       
170.2561 -61.9153    1.0  27.6  165.7  16.2279  11.1 ------	UNKNOWN

Plot creation:
Sun Mar  1 23:05:59 EST 2026