batgrbproduct analysis for trigger=1263840

batgrbproduct Analysis for Trigger=1263840

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): Wed Dec 18 16:29:12 EST 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1263840
======================================================================

  Trigger: 01263840      Segment: 000

  BAT Trigger Time: 752006095.36   [s; MET]
      Trigger Stop: 752006097.408   [s; MET]
               UTC: 2024-10-30T18:34:20.913240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 50.7882858108845   Dec: 34.4325795095614  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.43
     Image Trigger?:     NO
     Rate S/N Ratio:     28.3196045170126  [ if not an image trigger ]
     Image S/N Ratio:    9.43

  Flight Position:   [ source = BAT ]
    RA: 50.7882858108845   Dec: 34.4325795095614  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 50.7834928081352   Dec: 34.4372648060482  [deg; J2000]  
        { 03h 23m 08.0s , +34d 26' 14.2" }
         +/- 1.70467810394395 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.523980812279615 [arcmin] (formal 1-sigma fit error)
    SNR: 14.1971342877119
 
  Angular difference between Flight and Ground position is 0.367811 arcmin
 
  Partial Coding Fraction: 0.1123047    [ including projection effects ]

  Duration
     T90: 6.62399995326996 +/- 1.54505652265642
        Measured from: -0.863999962806702
                   to: 5.75999999046326     [s; relative to TRIGTIME]
     T50: 2.62399995326996 +/- 0.581748977247138
        Measured from: 0.368000030517578
                   to: 2.99199998378754     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.675999999046326     
                   to: 1.67599999904633     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.18400001525879     
                   to: 7.10399997234344     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.334934   0.692123   0.545804   0.161125
           0.053395   0.059274   0.053090   0.040309 [error]
 Peak      0.077619   0.140177   0.144386   0.042121
           0.021517   0.024421   0.024334   0.017798 [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 1.38e-07 2.72e-07 4.15e-07 1.38e-06 1.16e-06 2.20e-06   erg/cm2
              Error 2.34e-08 2.89e-08 4.95e-08 3.48e-07 1.24e-07 3.84e-07   erg/cm2
Peak flux Power-law 8.51e-01 1.01e+00 8.68e-01 1.27e+00 3.18e+00 4.00e+00   ph/cm2/s
              Error 2.81e-01 2.14e-01 1.61e-01 4.66e-01 5.89e-01 6.99e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.19e-07 2.94e-07 4.46e-07 5.28e-07 1.12e-06 1.38e-06   erg/cm2
              Error 2.77e-08 3.57e-08 5.83e-08 4.42e-07 1.32e-07 4.51e-07   erg/cm2
Peak flux Cutoff-PL 7.28e-01 1.07e+00 9.57e-01 7.18e-01 3.15e+00 3.47e+00   ph/cm2/s
              Error 3.41e-01 2.49e-01 2.26e-01 5.81e-01 5.91e-01 8.43e-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    1.391    0.159    -      -           1.45e-02 1.42e-03   61.450 57
CPL   0.593    0.714      92.7   92.9      3.55e-02 3.28e-02   56.990 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.221    0.274    -      -           2.70e-02 4.73e-03   61.160 57
CPL   0.539    1.213     121.7  -35.6      5.58e-02 1.22e-01   60.260 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: 5.568000 sec.
T50 in the 50-300 keV band: 2.240000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    8.288   -1.184    7.104
T90     6.624   -0.864    5.760
T50     2.624    0.368    2.992
Peak    1.000    0.676    1.676

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
   50.7835    34.4373   0.0136    38.6948    70.7101         1.7676041     14.197 TRIG_01263840                 
 
Foreground time interval of the image:
 -1.184   7.104 (delta_t =   8.288 [sec])
Background time interval of the image:
-103.659  -1.184 (delta_t = 102.475 [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 2.048000

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 2.048000

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 2.048000

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   -1.184 sec. to    7.104 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.39076     ( -0.159035   0.159372 )
Norm@50keV  : 1.45045E-02    ( -0.00142504   0.00142379 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.45     using 59 bins.
 Reduced chi-squared = 1.07807
# Null hypothesis probability of 3.20e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 8.288 sec: 1.76275 ( -0.17785  0.17818 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16394e-06 ( -1.23783e-07  1.24396e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.184 sec. to    7.104 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.592813     ( -0.77393   0.654861 )
Epeak [keV] : 92.7070      ( -23.8957 161.833 )
Norm@50keV  : 3.55077E-02    ( -0.0181621   0.0475297 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.99     using 59 bins.
 Reduced chi-squared = 1.01768
# Null hypothesis probability of 4.38e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 8.288 sec: 1.71660 ( -0.18195  0.1822 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.11975e-06 ( -1.32039e-07  1.31487e-07 ) ergs/cm2

Band function

Time interval is from   -1.184 sec. to    7.104 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]    : 16.2183  (-1.84505  2.15579)
R^2/D10^2   : 0.161924  (-0.0572811   0.0849298)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   71.67     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.14e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.276e-08   1.375e-08
25- 50  3.097e-07   4.625e-08
50-150  5.723e-07   1.051e-07
15-150  9.549e-07   1.193e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-40.8342      -200)
Norm        : 7.35450       (-0.71922     0.71922)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.88     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.06e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.518e-07   3.294e-08
25- 50  2.920e-07   1.231e-07
50-150  6.403e-07   3.272e-07
15-150  1.084e-06   3.480e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.44685        (-2.70431      2.88726)
R1^2/D10^2  : 0.639366        (-0.336857      0.655966)
kT2 [keV]   : 30.1728        (-8.52541      26.221)
R2^2/D10^2  : 1.31633E-02    (-0.0117318   0.0358466)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.56     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.54e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.097e-07   5.738e-08
25- 50  3.114e-07   1.616e-07
50-150  7.095e-07   3.859e-07
15-150  1.131e-06   5.559e-07

Peak spectrum fit

Power-law model

Time interval is from    0.676 sec. to    1.676 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22075     ( -0.279129   0.269253 )
Norm@50keV  : 2.69956E-02    ( -0.00473818   0.00471965 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.16     using 59 bins.
 Reduced chi-squared = 1.07298
# Null hypothesis probability of 3.29e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.17831 ( -0.5879  0.59057 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.72333e-07 ( -4.88523e-08  4.88999e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.676 sec. to    1.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.539131     ( -1.54241   0.883301 )
Epeak [keV] : 121.661      ( -50.3756 -121.659 )
Norm@50keV  : 5.57994E-02    ( -0.0324293   0.211027 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.26     using 59 bins.
 Reduced chi-squared = 1.07607
# Null hypothesis probability of 3.24e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.14581 ( -0.58878  0.59275 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.69967e-07 ( -5.03732e-08  4.97679e-08 ) ergs/cm2

Band function

Time interval is from    0.676 sec. to    1.676 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]    : 19.1908  (-3.3689  4.37532)
R^2/D10^2   : 0.179444  (-0.092076   0.167026)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.52     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.31e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.294e-08   4.291e-09
25- 50  6.269e-08   1.872e-08
50-150  1.700e-07   5.090e-08
15-150  2.456e-07   5.445e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-53.0308      -200)
Norm        : 13.5701       (-2.40394     2.40394)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   65.15     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.14e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.381e-08   1.969e-08
25- 50  6.504e-08   3.776e-08
50-150  1.426e-07   8.020e-08
15-150  2.415e-07   1.374e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 13.3327        (-6.03331      5.64622)
R1^2/D10^2  : 0.474967        (-0.289481      0.544852)
kT2 [keV]   : 94.6570        (-90.998      -98.014)
R2^2/D10^2  : 1.21129E-03    (-0.000932602   0.0856321)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.92     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.34e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.941e-08   1.198e-08
25- 50  6.825e-08   3.984e-08
50-150  1.822e-07   8.875e-08
15-150  2.699e-07   1.319e-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: 1.39076     ( -0.159035   0.159372 )
Norm@50keV  : 1.45045E-02    ( -0.00142504   0.00142379 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.45     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.20e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 8.288 sec: 1.76272 ( -0.17784  0.178178 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.16379e-06 ( -1.23756e-07  1.24409e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.592812     ( -0.77393   0.654861 )
Epeak [keV] : 92.7070      ( -23.8956 161.832 )
Norm@50keV  : 3.55077E-02    ( -0.0181622   0.0475297 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.99     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.38e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 8.288 sec: 1.71647 ( -0.18192  0.18216 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12019e-06 ( -1.31928e-07  1.31589e-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)  = 2.72e-07
S(50-100 keV) = 4.15e-07

T90 vs. Hardness ratio plot

T90                                   = 6.62399995326996 sec.
Hardness ratio (energy fluence ratio) = 1.52574

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.06645
Count Ratio (50-100 keV) / (15-25 keV) = 1.62959

Mask shadow pattern

IMX = 2.646090096228398E-01, IMY = -7.560338609049904E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-103.659400 -1.184000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.2082  41.0839    5.7  39.2 -130.2   0.5200   2.0    9.0	Cyg X-3                       
326.3480  38.3960    6.4  32.2 -151.5   0.3362   1.8    9.4	Cyg X-2                       
 48.8472  31.8319    2.6  39.9   75.2   2.6794   4.5 ------	UNKNOWN                       
334.6646  12.9015    3.1  51.6 -179.5   1.5681   3.8 ------	UNKNOWN                       
345.8353  57.4136    2.7  10.2 -130.6   0.5697   4.2 ------	UNKNOWN                       
317.2918  75.2638    3.4  23.3  -67.0   0.5640   3.4 ------	UNKNOWN                       
307.2162  35.2583    2.2  44.1 -135.0   1.7807   5.3 ------	UNKNOWN                       
304.2786  27.8861    2.5  51.5 -138.2   2.9903   4.6 ------	UNKNOWN

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

Time interval of the image:
-1.184000 7.104000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
307.9116  40.9868   41.1  39.4 -130.0  -0.0151  -0.3    9.2	Cyg X-3                       
326.1719  38.3209   32.7  32.3 -151.4   0.0134   0.4    0.0	Cyg X-2                       
 50.7835  34.4373    0.8  38.7   70.7   1.7672  14.1 ------	UNKNOWN                       
316.2656  34.8379    2.1  39.9 -144.2   0.2707   5.4 ------	UNKNOWN                       
307.5956  49.8217    2.4  33.5 -118.9   0.2328   4.9 ------	UNKNOWN                       
297.6281  43.3978    2.5  42.9 -119.1   0.5431   4.6 ------	UNKNOWN                       
306.7147  23.4925    2.2  54.0 -143.6   0.8750   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
139.140600 917.040600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6328  22.0055    0.4  31.3  -23.2  31.2467  30.7    0.5	Crab                          
 85.0053  -5.8547    3.0  51.6    6.6   6.0627   3.8 ------	UNKNOWN                       
 92.7214   9.9839    2.9  45.4  -15.5   6.3507   4.1 ------	UNKNOWN                       
331.9538  58.1429    2.5  55.6 -166.7  14.6716   4.7 ------	UNKNOWN                       
102.1422  55.6162    2.7  40.8  -85.4  16.9473   4.3 ------	UNKNOWN

Plot creation:
Wed Dec 18 17:42:13 EST 2024