batgrbproduct analysis for trigger=1325580

batgrbproduct Analysis for Trigger=1325580

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 05:56:03 EST 2026
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1325580
======================================================================

  Trigger: 01325580      Segment: 000

  BAT Trigger Time: 771886945.92   [s; MET]
      Trigger Stop: 771886950.016   [s; MET]
               UTC: 2025-06-17T21:01:50.115100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 332.902170830084   Dec: 32.7273299332687  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.49
     Image Trigger?:     NO
     Rate S/N Ratio:     14.3178210632764  [ if not an image trigger ]
     Image S/N Ratio:    7.49

  Flight Position:   [ source = BAT ]
    RA: 332.902170830084   Dec: 32.7273299332687  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 332.882525631319   Dec: 32.720691126545  [deg; J2000]  
        { 22h 11m 31.8s , +32d 43' 14.5" }
         +/- 1.86924757491658 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.645752704602281 [arcmin] (formal 1-sigma fit error)
    SNR: 12.4458027713715
 
  Angular difference between Flight and Ground position is 1.068644 arcmin
 
  Partial Coding Fraction: 0.1025391    [ including projection effects ]

  Duration
     T90: 36.527999997139 +/- 6.86648431231916
        Measured from: -24.663999915123
                   to: 11.864000082016     [s; relative to TRIGTIME]
     T50: 19.9840000867844 +/- 2.95532605750028
        Measured from: -16.9359999895096
                   to: 3.04800009727478     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.188000082969666     
                   to: 1.18800008296967     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -29.3199999332428     
                   to: 14.2960000038147     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.239103   1.602304   0.826953   0.211573
           0.155980   0.160233   0.129429   0.101529 [error]
 Peak      0.127577   0.129443   0.079969  -0.004289
           0.026789   0.030148   0.024378   0.015432 [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 5.71e-07 7.15e-07 6.54e-07 1.04e-06 2.30e-06 2.98e-06   erg/cm2
              Error 1.03e-07 8.78e-08 1.25e-07 3.93e-07 3.04e-07 5.35e-07   erg/cm2
Peak flux Power-law 2.00e+00 7.46e-01 1.61e-01 4.11e-02 2.93e+00 2.95e+00   ph/cm2/s
              Error 6.08e-01 2.40e-01 8.68e-02 4.18e-02 8.26e-01 8.30e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.84e-07 8.07e-07 6.89e-07 3.09e-07 2.19e-06 2.29e-06   erg/cm2
              Error 1.25e-07 1.17e-07 1.46e-07 3.72e-07 3.14e-07 4.84e-07   erg/cm2
Peak flux Cutoff-PL 1.33e+00 1.33e+00 3.86e-01 2.13e-02 3.06e+00 3.06e+00   ph/cm2/s
              Error 7.92e-01 3.92e-01 2.33e-01 2.71e-02 8.57e-01 8.58e-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    2.134    0.219    -      -           5.65e-03 8.10e-04   71.720 57
CPL   1.030    1.060      41.9   15.5      2.14e-02 4.50e-02   67.510 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.211    0.506    -      -           9.11e-03 4.08e-03   74.320 57
CPL  -0.075    2.472      34.9   24.0      4.64e-01 5.53e+00   66.400 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: 37.056000 sec.
T50 in the 50-300 keV band: 18.944000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   43.616  -29.320   14.296
T90    36.528  -24.664   11.864
T50    19.984  -16.936    3.048
Peak    1.000    0.188    1.188

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
  332.8825    32.7207   0.0154    54.6549     0.5964         4.1594981     12.446 TRIG_01325580                 
 
Foreground time interval of the image:
-29.320  14.296 (delta_t =  43.616 [sec])
Background time interval of the image:
-272.920 -29.320 (delta_t = 243.600 [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  -29.320 sec. to   14.296 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.13353     ( -0.210812   0.226659 )
Norm@50keV  : 5.65169E-03    ( -0.000819416   0.000799922 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   71.72     using 59 bins.
 Reduced chi-squared = 1.25825
# Null hypothesis probability of 9.07e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 43.62 sec: 0.904241 ( -0.114957  0.115409 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29893e-06 ( -3.02494e-07  3.04737e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -29.320 sec. to   14.296 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02958     ( -1.18636   0.934254 )
Epeak [keV] : 41.8898      ( -17.9547 13.0283 )
Norm@50keV  : 2.14446E-02    ( -0.0214449   0.0684626 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.51     using 59 bins.
 Reduced chi-squared = 1.20554
# Null hypothesis probability of 1.39e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 43.62 sec: 0.861113 ( -0.120434  0.120828 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.19415e-06 ( -3.11861e-07  3.16731e-07 ) ergs/cm2

Band function

Time interval is from  -29.320 sec. to   14.296 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]    : 11.2722  (-1.39731  1.57678)
R^2/D10^2   : 0.265034  (-0.106794   0.178674)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   76.95     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.03e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.083e-07   6.698e-08
25- 50  8.992e-07   1.433e-07
50-150  6.574e-07   1.861e-07
15-150  1.865e-06   2.903e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 62.2532       (-16.4692      25.3914)
Norm        : 4.63983       (-0.867085     1.02579)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.80     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.55e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.116e-07   8.299e-08
25- 50  7.873e-07   1.119e-07
50-150  9.233e-07   2.600e-07
15-150  2.222e-06   3.160e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.27025        (-1.13629      2.59169)
R1^2/D10^2  : 248.580        (-245.688      178668)
kT2 [keV]   : 12.7480        (-1.87277      2.8786)
R2^2/D10^2  : 0.152501    (-0.0915362   0.135129)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   65.60     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.55e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.159e-07   2.029e-07
25- 50  7.870e-07   1.786e-07
50-150  7.850e-07   2.441e-07
15-150  2.088e-06   4.851e-07

Peak spectrum fit

Power-law model

Time interval is from    0.188 sec. to    1.188 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.21147     ( -0.401442   0.61146 )
Norm@50keV  : 9.10595E-03    ( -0.00421461   0.00394741 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   74.32     using 59 bins.
 Reduced chi-squared = 1.30386
# Null hypothesis probability of 6.14e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.93403 ( -0.82633  0.8264 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21392e-07 ( -3.62351e-08  3.63982e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.188 sec. to    1.188 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -7.51464E-02     ( -2.94786   1.99698 )
Epeak [keV] : 34.8515      ( -35.0089 13.0765 )
Norm@50keV  : 0.464456    ( -0.477931   10.5849 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.40     using 59 bins.
 Reduced chi-squared = 1.18571
# Null hypothesis probability of 1.61e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.05884 ( -0.86667  0.84817 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.58453e-07 ( -4.02278e-08  4.3235e-08 ) ergs/cm2

Band function

Time interval is from    0.188 sec. to    1.188 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]    : 10.7713  (-2.37574  2.08199)
R^2/D10^2   : 1.19102  (-0.631244   1.87622)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.04     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.71e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.874e-08   1.454e-08
25- 50  7.909e-08   4.050e-08
50-150  5.099e-08   2.721e-08
15-150  1.588e-07   6.734e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 29.3004       (-10.2769      10.2642)
Norm        : 26.9292       (-9.22437     14.4722)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.85     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.54e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.414e-08   1.732e-08
25- 50  6.105e-08   2.383e-08
50-150  3.241e-08   2.116e-08
15-150  1.476e-07   5.012e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.72103        (-1.62255      2.20003)
R1^2/D10^2  : 309.513        (-299.494      816832)
kT2 [keV]   : 11.8861        (-2.3783      2.28133)
R2^2/D10^2  : 0.689610    (-0.416767   1.02343)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.12     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.38e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.133e-08   2.971e-08
25- 50  6.722e-08   4.081e-08
50-150  5.408e-08   3.616e-08
15-150  1.726e-07   9.370e-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: 2.13353     ( -0.210812   0.226659 )
Norm@50keV  : 5.65169E-03    ( -0.000819416   0.000799922 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   71.72     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.07e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 43.62 sec: 0.904160 ( -0.114941  0.115388 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.29851e-06 ( -3.0244e-07  3.04749e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.02949     ( -1.18634   0.93428 )
Epeak [keV] : 41.8899      ( -17.9217 13.0148 )
Norm@50keV  : 2.14471E-02    ( -0.0214454   0.0684621 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.51     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.39e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 43.62 sec: 0.860957 ( -0.120387  0.120766 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.19467e-06 ( -3.11818e-07  3.17035e-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)  = 7.15e-07
S(50-100 keV) = 6.54e-07

T90 vs. Hardness ratio plot

T90                                   = 36.527999997139 sec.
Hardness ratio (energy fluence ratio) = 0.914685

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.29312
Count Ratio (50-100 keV) / (15-25 keV) = 0.66738

Mask shadow pattern

IMX = 1.409917349138206E+00, IMY = -1.467674873633135E-02

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:
-272.920000 -29.320000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3523  35.3150    5.4  23.0  105.9   0.9940   2.1    5.4	Her X-1                       
299.5772  35.1910    0.8  35.4   29.3   8.3804  14.7    0.9	Cyg X-1                       
308.3765  40.9825    0.0  35.5   13.7   1.1172   2.2   12.2	Cyg X-3                       
326.1455  38.3222   55.7  46.8    1.3  -0.1267  -0.2    1.2	Cyg X-2                       
161.0329  54.6445    2.9  49.3 -132.1   6.8585   4.0 ------	UNKNOWN                       
 21.7768  71.0634    3.8  44.9  -60.2   5.5550   3.0 ------	UNKNOWN                       
 26.7267  73.5656    2.9  43.8  -64.1   7.3082   4.0 ------	UNKNOWN                       
159.7148  56.9585    3.0  48.1 -129.2   7.3479   3.8 ------	UNKNOWN

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

Time interval of the image:
-29.320000 14.296000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4548  35.3101    4.3  22.9  105.6   0.2733   2.7    1.9	Her X-1                       
299.6133  35.0588   13.2  35.6   29.4   0.1161   0.9    8.6	Cyg X-1                       
308.2829  40.8802   13.2  35.6   13.9  -0.0993  -0.9    9.0	Cyg X-3                       
326.0824  38.4086    5.4  46.7    1.3   0.3650   2.1    6.7	Cyg X-2                       
332.8825  32.7207    0.9  54.7    0.6   4.1602  12.4 ------	UNKNOWN                       
190.4906  53.7678    2.0  36.7 -149.3   0.6226   5.7 ------	UNKNOWN                       
358.2886  45.0421    2.1  57.5  -27.2   2.5203   5.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
775.980590 962.099300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5682  35.2025    0.7  27.6  137.1   5.8572  15.4    1.1	Cyg X-1                       
308.1960  40.9738    7.2  21.3  152.4   0.4931   1.6    4.1	Cyg X-3                       
326.2797  38.4573   37.0   7.9  171.3   0.0804   0.3    9.6	Cyg X-2                       
291.9659  48.6959    2.5  34.4  162.6   1.9596   4.6 ------	UNKNOWN                       
256.0716  62.5104    2.5  55.4  179.5   4.8291   4.6 ------	UNKNOWN                       
 10.9736  -3.8645    2.1  51.4  -19.4   3.9021   5.6 ------	UNKNOWN                       
 23.5206  27.2386    3.2  43.8  -64.1   5.1058   3.6 ------	UNKNOWN                       
 25.1766  72.8963    2.7  48.1 -129.2   6.7627   4.3 ------	UNKNOWN

Plot creation:
Sun Mar  1 23:38:55 EST 2026