batgrbproduct analysis for trigger=1187463

batgrbproduct Analysis for Trigger=1187463

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 Sep 29 23:24:33 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1187463
======================================================================

  Trigger: 01187463      Segment: 000

  BAT Trigger Time: 714771198.976   [s; MET]
      Trigger Stop: 714771200   [s; MET]
               UTC: 2023-08-26T19:32:47.078920    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 83.0117437221934   Dec: 66.124903377032  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.04
     Image Trigger?:     NO
     Rate S/N Ratio:     45.902069670114  [ if not an image trigger ]
     Image S/N Ratio:    15.04

  Flight Position:   [ source = BAT ]
    RA: 83.0117437221934   Dec: 66.124903377032  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 83.049639325098   Dec: 66.1248572518743  [deg; J2000]  
        { 05h 32m 11.9s , +66d 07' 29.5" }
         +/- 0.6182241087203 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.192837617292267 [arcmin] (formal 1-sigma fit error)
    SNR: 60.4618354446474
 
  Angular difference between Flight and Ground position is 0.920286 arcmin
 
  Partial Coding Fraction: 0.875    [ including projection effects ]

  Duration
     T90: 40.8399999141693 +/- 1.65832214332882
        Measured from: -2.75199997425079
                   to: 38.0879999399185     [s; relative to TRIGTIME]
     T50: 12.1879999637604 +/- 0.865572549812708
        Measured from: 1.95600008964539
                   to: 14.1440000534058     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.43599998950958     
                   to: 3.43599998950958     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.31199991703033     
                   to: 47.4800000190735     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.682061   2.375795   1.714021   0.390432
           0.048673   0.051504   0.044676   0.035144 [error]
 Peak      0.079874   0.158113   0.118059   0.028862
           0.007585   0.008988   0.008368   0.005867 [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 5.14e-07 9.31e-07 1.30e-06 3.79e-06 3.73e-06 6.51e-06   erg/cm2
              Error 2.78e-08 2.91e-08 4.56e-08 3.01e-07 1.10e-07 3.27e-07   erg/cm2
Peak flux Power-law 8.05e-01 9.51e-01 8.11e-01 1.17e+00 2.98e+00 3.74e+00   ph/cm2/s
              Error 9.36e-02 7.01e-02 6.49e-02 1.90e-01 2.02e-01 2.70e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.80e-07 9.52e-07 1.33e-06 2.50e-06 3.65e-06 5.26e-06   erg/cm2
              Error 3.52e-08 3.23e-08 5.02e-08 6.87e-07 1.24e-07 6.93e-07   erg/cm2
Peak flux Cutoff-PL 6.79e-01 1.05e+00 8.77e-01 4.30e-01 2.89e+00 3.04e+00   ph/cm2/s
              Error 1.11e-01 9.01e-02 7.72e-02 2.14e-01 2.08e-01 2.88e-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    1.520    0.052    -      -           7.34e-03 2.03e-04   59.780 57
CPL   1.215    0.212     137.0   98.5      1.02e-02 2.32e-03   53.300 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.230    0.108    -      -           2.53e-02 1.70e-03   57.000 57
CPL   0.235    0.550      88.5   29.6      8.11e-02 5.73e-02   44.590 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: 39.744000 sec.
T50 in the 50-300 keV band: 9.600000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   53.792   -6.312   47.480
T90    40.840   -2.752   38.088
T50    12.188    1.956   14.144
Peak    1.000    2.436    3.436

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
   83.0496    66.1249   0.0032    15.6548    46.2238         4.7220723     60.462 TRIG_01187463                 
 
Foreground time interval of the image:
 -6.312  13.325 (delta_t =  19.637 [sec])
Background time interval of the image:
-239.976  -6.312 (delta_t = 233.664 [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   -6.312 sec. to   47.480 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52049     ( -0.0522357   0.0522866 )
Norm@50keV  : 7.33766E-03    ( -0.000203507   0.000203461 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.78     using 59 bins.
 Reduced chi-squared = 1.04877
# Null hypothesis probability of 3.75e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 53.79 sec: 0.921191 ( -0.027714  0.027787 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.73251e-06 ( -1.10239e-07  1.10495e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -6.312 sec. to   47.480 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21479     ( -0.217435   0.207147 )
Epeak [keV] : 136.965      ( -35.7123 161.221 )
Norm@50keV  : 1.02161E-02    ( -0.00200262   0.0026341 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.30     using 59 bins.
 Reduced chi-squared = 0.951786
# Null hypothesis probability of 5.78e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 53.79 sec: 0.901297 ( -0.030498  0.030588 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.64848e-06 ( -1.24352e-07  1.23954e-07 ) ergs/cm2

Band function

Time interval is from   -6.312 sec. to   47.480 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]    : 16.0986  (  )
R^2/D10^2   : 7.85576E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  296.58     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.31e-34 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.261e-07   1.302e-08
25- 50  9.565e-07   3.523e-08
50-150  1.737e-06   9.117e-08
15-150  2.919e-06   1.006e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-13.3352      -200)
Norm        : 3.75872       (-0.103772     0.103772)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.45     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.96e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.035e-07   1.546e-08
25- 50  9.686e-07   3.254e-08
50-150  2.124e-06   6.993e-08
15-150  3.596e-06   1.148e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.28039        (-0.753591      0.827986)
R1^2/D10^2  : 0.793107        (-0.23783      0.368043)
kT2 [keV]   : 26.5187        (-2.46518      3.29295)
R2^2/D10^2  : 1.09705E-02    (-0.00380756   0.00482484)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.70     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.25e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.475e-07   4.629e-08
25- 50  9.652e-07   6.105e-08
50-150  2.210e-06   1.901e-07
15-150  3.622e-06   2.308e-07

Peak spectrum fit

Power-law model

Time interval is from    2.436 sec. to    3.436 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22983     ( -0.108258   0.107993 )
Norm@50keV  : 2.53140E-02    ( -0.00170553   0.00170429 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.00     using 59 bins.
 Reduced chi-squared = 1
# Null hypothesis probability of 4.75e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.98445 ( -0.20147  0.20154 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.54736e-07 ( -1.9372e-08  1.95161e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.436 sec. to    3.436 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.234942     ( -0.589257   0.510534 )
Epeak [keV] : 88.5089      ( -16.9041 42.1998 )
Norm@50keV  : 8.10734E-02    ( -0.0359158   0.0786656 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.59     using 59 bins.
 Reduced chi-squared = 0.79625
# Null hypothesis probability of 8.64e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.89044 ( -0.20886  0.20786 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.35879e-07 ( -2.21025e-08  2.21093e-08 ) ergs/cm2

Band function

Time interval is from    2.436 sec. to    3.436 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]    : 16.2363  (-1.24986  1.39536)
R^2/D10^2   : 0.282080  (-0.068709   0.0879263)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.46     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.88e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.532e-08   1.990e-09
25- 50  6.529e-08   5.760e-09
50-150  1.210e-07   1.580e-08
15-150  2.016e-07   1.755e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-15.4499      -200)
Norm        : 12.1863       (-0.826212     0.826212)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   72.59     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.98e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.034e-08   2.395e-09
25- 50  5.836e-08   6.130e-09
50-150  1.280e-07   3.986e-08
15-150  2.167e-07   4.095e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.8693        (-2.41749      2.10465)
R1^2/D10^2  : 0.615815        (-0.213702      0.350691)
kT2 [keV]   : 50.4981        (-25.3232      -53.1508)
R2^2/D10^2  : 4.44266E-03    (-0.00336626   0.0271424)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   38.67     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.53e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.956e-08   3.825e-09
25- 50  6.584e-08   1.632e-08
50-150  1.576e-07   7.094e-08
15-150  2.430e-07   8.933e-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: 1.31642     ( -0.0449976   0.044911 )
Norm@50keV  : 1.53390E-02    ( -0.000389125   0.000389099 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   93.07     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.81e-03 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 19.64 sec: 1.83564 ( -0.0498394  0.0499216 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.96523e-06 ( -8.01336e-08  8.02488e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.653034     ( -0.208899   0.199403 )
Epeak [keV] : 112.786      ( -14.4901 24.7679 )
Norm@50keV  : 3.07177E-02    ( -0.00564647   0.00727459 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.41     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.23e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 19.64 sec: 1.76691 ( -0.05314  0.05326 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.8566e-06 ( -8.78104e-08  8.73784e-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)  = 9.31e-07
S(50-100 keV) = 1.30e-06

T90 vs. Hardness ratio plot

T90                                   = 40.8399999141693 sec.
Hardness ratio (energy fluence ratio) = 1.39635

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.41243
Count Ratio (50-100 keV) / (15-25 keV) = 1.019

Mask shadow pattern

IMX = 1.938793204284003E-01, IMY = -2.023434344718492E-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:
-239.976000 -6.312000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6146  22.0309    1.5  54.3    1.6   8.0728   7.4    1.4	Crab                          
 34.3495  64.0310    3.9  32.0   77.2   2.0291   2.9 ------	UNKNOWN                       
136.3386  48.1186    3.3  23.3  -66.9   1.3384   3.5 ------	UNKNOWN

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

Time interval of the image:
-6.312000 13.324600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6882  21.8462    0.0  54.4    1.4   0.6274   1.8   10.5	Crab                          
254.3482  64.6411    3.2  40.2  163.6   0.4714   3.6 ------	UNKNOWN                       
 83.0497  66.1248    0.2  15.7   46.2   4.7223  60.5 ------	UNKNOWN                       
127.7589  22.8597    2.6  47.9  -50.9   1.4286   4.4 ------	UNKNOWN                       
164.0996  35.2941    3.2  41.1  -99.1   1.1724   3.6 ------	UNKNOWN                       
132.9889  25.3293    3.8  45.7  -57.6   1.0401   3.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
61.724600 962.072300
1001.024000 1091.064000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6066  22.0277    0.8  44.1  -12.8  37.0084  14.1    1.7	Crab                          
333.0297  68.2769    2.6  37.0  132.7  14.4411   4.4 ------	UNKNOWN                       
 40.8020  61.4735    2.2  18.8   83.8   8.4474   5.2 ------	UNKNOWN                       
 62.2305  46.9493    2.8  22.1   28.1   6.8658   4.1 ------	UNKNOWN                       
112.2560  48.3853    3.2  23.3  -67.0   6.2779   3.7 ------	UNKNOWN                       
157.8090  60.2094    2.9  32.2 -127.8   7.4256   4.0 ------	UNKNOWN

Plot creation:
Sat Sep 30 00:42:04 EDT 2023