batgrbproduct analysis for trigger=1129775

batgrbproduct Analysis for Trigger=1129775

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): Fri Nov  3 18:42:36 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1129775
======================================================================

  Trigger: 01129775      Segment: 000

  BAT Trigger Time: 687656394.24   [s; MET]
      Trigger Stop: 687656395.264   [s; MET]
               UTC: 2022-10-16T23:39:24.191840    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 38.9491080216353   Dec: -34.6241149888059  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.3
     Image Trigger?:     NO
     Rate S/N Ratio:     44.2944691807002  [ if not an image trigger ]
     Image S/N Ratio:    15.3

  Flight Position:   [ source = BAT ]
    RA: 38.9491080216353   Dec: -34.6241149888059  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 38.9379596360006   Dec: -34.6150782101858  [deg; J2000]  
        { 02h 35m 45.1s , -34d 36' 54.3" }
         +/- 0.902618096643646 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.270736379198722 [arcmin] (formal 1-sigma fit error)
    SNR: 35.2114607495491
 
  Angular difference between Flight and Ground position is 0.772660 arcmin
 
  Partial Coding Fraction: 0.53125    [ including projection effects ]

  Duration
     T90: 21.9839999675751 +/- 5.77567315918603
        Measured from: -1.7039999961853
                   to: 20.2799999713898     [s; relative to TRIGTIME]
     T50: 5.26399993896484 +/- 0.904247879730355
        Measured from: 0.424000024795532
                   to: 5.68799996376038     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0279999971389771     
                   to: 1.02799999713898     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.17599999904633     
                   to: 29.7999999523163     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.770972   1.195091   1.111551   0.213114
           0.048165   0.052114   0.047547   0.039727 [error]
 Peak      0.075105   0.157846   0.166415   0.033622
           0.010300   0.012248   0.012098   0.008758 [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 2.34e-07 4.91e-07 8.11e-07 3.02e-06 2.24e-06 4.55e-06   erg/cm2
              Error 2.10e-08 2.62e-08 4.63e-08 3.87e-07 1.16e-07 4.16e-07   erg/cm2
Peak flux Power-law 7.54e-01 1.02e+00 1.02e+00 1.83e+00 3.39e+00 4.63e+00   ph/cm2/s
              Error 1.19e-01 1.00e-01 9.13e-02 3.43e-01 2.81e-01 4.20e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.11e-07 5.11e-07 8.44e-07 1.65e-06 2.17e-06 3.22e-06   erg/cm2
              Error 2.64e-08 2.98e-08 5.34e-08 7.21e-07 1.26e-07 7.19e-07   erg/cm2
Peak flux Cutoff-PL 6.41e-01 1.07e+00 1.11e+00 9.89e-01 3.32e+00 3.80e+00   ph/cm2/s
              Error 1.48e-01 1.14e-01 1.18e-01 5.19e-01 2.87e-01 5.82e-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    1.281    0.084    -      -           6.84e-03 3.20e-04   63.210 57
CPL   0.817    0.355     139.1  124.8      1.12e-02 4.31e-03   57.660 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.004    0.134    -      -           2.94e-02 2.41e-03   51.110 57
CPL   0.332    0.603     140.6  197.6      5.95e-02 4.02e-02   46.780 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: 9.920000 sec.
T50 in the 50-300 keV band: 3.712000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   32.976   -3.176   29.800
T90    21.984   -1.704   20.280
T50     5.264    0.424    5.688
Peak    1.000    0.028    1.028

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   38.9380   -34.6151   0.0055    24.2661   -69.1492         3.3941642     35.211 TRIG_01129775                 
 
Foreground time interval of the image:
 -3.176  15.261 (delta_t =  18.437 [sec])
Background time interval of the image:
-201.539  -3.176 (delta_t = 198.363 [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   -3.176 sec. to   29.800 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28087     ( -0.0836576   0.0834755 )
Norm@50keV  : 6.83597E-03    ( -0.000319943   0.000319931 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.21     using 59 bins.
 Reduced chi-squared = 1.10895
# Null hypothesis probability of 2.66e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 32.98 sec: 0.812753 ( -0.039517  0.039577 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.23867e-06 ( -1.15718e-07  1.16218e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -3.176 sec. to   29.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.816820     ( -0.369794   0.340649 )
Epeak [keV] : 139.095      ( -38.8446 210.851 )
Norm@50keV  : 1.12348E-02    ( -0.00335978   0.00525646 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.66     using 59 bins.
 Reduced chi-squared = 1.02964
# Null hypothesis probability of 4.14e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 32.98 sec: 0.793048 ( -0.041986  0.041989 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.17456e-06 ( -1.2627e-07  1.25989e-07 ) ergs/cm2

Band function

Time interval is from   -3.176 sec. to   29.800 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]    : 18.2583  (  )
R^2/D10^2   : 4.94753E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  122.47     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.09e-06 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.084e-07   1.029e-08
25- 50  5.067e-07   3.183e-08
50-150  1.230e-06   1.078e-07
15-150  1.846e-06   1.097e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-9.26154      -200)
Norm        : 3.38371       (-0.16004     0.16004)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   89.50     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.86e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.778e-07   1.550e-08
25- 50  5.345e-07   2.622e-08
50-150  1.172e-06   6.860e-08
15-150  1.985e-06   1.148e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.21581        (-1.32778      1.80536)
R1^2/D10^2  : 0.911562        (-0.520079      1.37215)
kT2 [keV]   : 24.5833        (-2.68773      4.17765)
R2^2/D10^2  : 1.60348E-02    (-0.00701723   0.00834088)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.39     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.52e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.181e-07   5.950e-08
25- 50  4.894e-07   9.195e-08
50-150  1.433e-06   1.850e-07
15-150  2.141e-06   2.676e-07

Peak spectrum fit

Power-law model

Time interval is from    0.028 sec. to    1.028 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00359     ( -0.135423   0.133393 )
Norm@50keV  : 2.94191E-02    ( -0.00240654   0.00240439 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.11     using 59 bins.
 Reduced chi-squared = 0.896667
# Null hypothesis probability of 6.95e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.38764 ( -0.28056  0.28078 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.17753e-07 ( -2.84786e-08  2.86407e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.028 sec. to    1.028 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.332161     ( -0.64837   0.557813 )
Epeak [keV] : 140.561      ( -43.3511 351.896 )
Norm@50keV  : 5.95055E-02    ( -0.0258889   0.0545339 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.78     using 59 bins.
 Reduced chi-squared = 0.835357
# Null hypothesis probability of 8.05e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.32390 ( -0.28717  0.28648 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.09072e-07 ( -3.04471e-08  3.01859e-08 ) ergs/cm2

Band function

Time interval is from    0.028 sec. to    1.028 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]    : 21.1580  (-2.10231  2.42993)
R^2/D10^2   : 0.141120  (-0.0410238   0.0556298)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.57     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.16e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.190e-08   1.901e-09
25- 50  6.144e-08   7.980e-09
50-150  2.051e-07   2.870e-08
15-150  2.784e-07   3.035e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-13.7085      -200)
Norm        : 13.4591       (-1.15257     1.15257)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   91.58     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.49e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.351e-08   4.660e-09
25- 50  6.446e-08   1.743e-08
50-150  1.414e-07   5.689e-08
15-150  2.393e-07   8.230e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.38271        (-4.10215      6.15156)
R1^2/D10^2  : 0.826576        (-0.551155      3.70364)
kT2 [keV]   : 31.4788        (-7.77951      67.3464)
R2^2/D10^2  : 3.28489E-02    (-0.0309297   0.0577613)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.14     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.65e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.940e-08   9.877e-09
25- 50  6.382e-08   2.801e-08
50-150  2.273e-07   1.151e-07
15-150  3.105e-07   1.494e-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: 1.28969     ( -0.0738128   0.0737059 )
Norm@50keV  : 1.14236E-02    ( -0.000473149   0.000473134 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.17     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.68e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 18.44 sec: 1.36030 ( -0.0586347  0.0587307 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.08689e-06 ( -9.52629e-08  9.5559e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.852482     ( -0.321105   0.299071 )
Epeak [keV] : 143.189      ( -38.7267 176.512 )
Norm@50keV  : 1.82539E-02    ( -0.00489662   0.00724374 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.75     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.09e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 18.44 sec: 1.32957 ( -0.06205  0.06207 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.03275e-06 ( -1.03946e-07  1.03375e-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)  = 4.91e-07
S(50-100 keV) = 8.11e-07

T90 vs. Hardness ratio plot

T90                                   = 21.9839999675751 sec.
Hardness ratio (energy fluence ratio) = 1.65173

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.55011
Count Ratio (50-100 keV) / (15-25 keV) = 1.44175

Mask shadow pattern

IMX = 1.604581815327354E-01, IMY = 4.212827896937619E-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:
-201.539400 -3.176000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6459  22.0219    4.7  55.3  166.6   6.5298   2.5    0.8	Crab                          
341.8213 -38.0477    2.4  57.2  -16.1   7.6981   4.7 ------	UNKNOWN

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

Time interval of the image:
-3.176000 15.260590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.8063  22.0146    9.0  55.4  166.7  -0.4122  -1.3    9.6	Crab                          
 56.2092 -11.6701    2.5  17.9 -151.3   0.2928   4.7 ------	UNKNOWN                       
 38.9380 -34.6151    0.3  24.3  -69.1   3.3942  35.2 ------	UNKNOWN                       
 95.6192  -1.0189    2.5  58.0 -162.5   1.9952   4.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
75.060600 350.060590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
357.0343  -7.2209    2.8  47.2   49.2   7.3637   4.1  468.2	UNKNOWN                       
321.2465 -48.6870    2.0  57.1  -16.1  11.4746   5.7 ------	UNKNOWN

Plot creation:
Fri Nov  3 18:50:20 EDT 2023