GRB201017A: Summary Image Light curves Spectra Distribution Others

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: Sat Jul 30 01:10:54 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1000613
======================================================================

  Trigger: 01000613      Segment: 000

  BAT Trigger Time: 624620817.088   [s; MET]
      Trigger Stop: 624620819.136   [s; MET]
               UTC: 2020-10-17T09:46:31.267800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 36.6334750470493   Dec: 66.6727003365269  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.33
     Image Trigger?:     NO
     Rate S/N Ratio:     13.9283882771841  [ if not an image trigger ]
     Image S/N Ratio:    7.33

  Analysis Position:   [ source = BAT ]
    RA: 36.6334750470493   Dec: 66.6727003365269  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 36.6021095137194   Dec: 66.6707421185928  [deg; J2000]  
        { 02h 26m 24.5s , +66d 40' 14.7" }
         +/- 2.27364055643405 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.16885987910631 [arcmin] (formal 1-sigma fit error)
    SNR: 9.40840053449997
 
  Angular difference between the analysis and refined position is 0.754448 arcmin
 
  Partial Coding Fraction: 0.3789062    [ including projection effects ]

  Duration
     T90: 22.0800000429153 +/- 6.25242363875111
        Measured from: -2.28800010681152
                   to: 19.7919999361038     [s; relative to TRIGTIME]
     T50: 9.4559999704361 +/- 4.88010503176866
        Measured from: -0.432000041007996
                   to: 9.0239999294281     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.867999911308289     
                   to: 1.86799991130829     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.76800000667572     
                   to: 23.8719999790192     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.319378   0.499730   0.404992   0.150167
           0.068774   0.070942   0.061082   0.052261 [error]
 Peak      0.048818   0.086839   0.048016   0.019325
           0.014638   0.015208   0.013333   0.011184 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   26.640   -2.768   23.872
T90    22.080   -2.288   19.792
T50     9.456   -0.432    9.024
Peak    1.000    0.868    1.868
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: N/A)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.484    -0.246      0.247       -           -               -         3.58e-03     -5.27e-04          5.26e-04      40.430   57
CPL     -0.921    -0.754      1.286       95.895     -38.330       -95.895      6.91e-03     -3.75e-03          2.35e-02      39.530   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -1.666     -0.358     0.342       -           -               -         1.34e-02     -3.04e-03          2.99e-03      61.410   57
CPL     -0.189     -1.690     3.289       56.319     -11.134       -56.319      8.37e-02     -8.37e-02          4.74e+00      59.550   56
 
 
=== 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         PL   1.20e-07  2.22e-07  3.18e-07  9.62e-07  9.06e-07  1.62e-06   erg/cm2
      90%_error_low -2.93e-08 -3.52e-08 -5.84e-08 -3.27e-07 -1.43e-07 -3.81e-07   erg/cm2
      90%_error_hi   3.12e-08  3.47e-08  5.78e-08  4.25e-07  1.44e-07  4.57e-07   erg/cm2
Peak flux       PL   6.48e-01  5.91e-01  3.73e-01  3.60e-01  1.76e+00  1.97e+00   ph/cm2/s
      90%_error_low -2.06e-01 -1.30e-01 -1.05e-01 -1.65e-01 -3.80e-01 -4.20e-01   ph/cm2/s
      90%_error_hi   2.23e-01  1.29e-01  1.04e-01  2.27e-01  3.81e-01  4.22e-01   ph/cm2/s
 
Fluence        CPL   1.09e-07  2.36e-07  3.30e-07  4.39e-07  8.73e-07  1.12e-06   erg/cm2
      90%_error_low -3.48e-08 -4.29e-08 -6.41e-08 -3.19e-07 -1.59e-07 -3.58e-07   erg/cm2
      90%_error_hi   3.60e-08  4.58e-08  6.61e-08  6.39e-07  1.57e-07  6.75e-07   erg/cm2
Peak flux      CPL   5.26e-01  6.91e-01  3.95e-01  8.56e-02  1.68e+00  1.70e+00   ph/cm2/s
      90%_error_low -2.68e-01 -1.80e-01 -1.39e-01 -8.56e-02 -4.06e-01 -4.20e-01   ph/cm2/s
      90%_error_hi   2.70e-01  1.98e-01  1.28e-01  3.44e-01  3.99e-01  5.09e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   36.6021    66.6707   0.0203    41.9154   170.3374         1.2993607      9.408 TRIG_01000613                 
 
Foreground time interval of the image:
 -2.768  23.872 (delta_t =  26.640 [sec])
Background time interval of the image:
-239.088  -2.768 (delta_t = 236.320 [sec])

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Other quick-look light curves:

• 64 ms binning (zoomed)
• 16 ms binning (zoomed)
• 8 ms binning (zoomed)
• 2 ms binning (zoomed)
• SN=5 or 10 s binning (full-time range)
• Raw light curve

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   -2.768 sec. to   23.872 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.48355     ( -0.246246   0.246728 )
Norm@50keV  : 3.57583E-03    ( -0.000527377   0.000525867 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   40.43     using 59 bins.
 Reduced chi-squared = 0.709298
# Null hypothesis probability of 9.53e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 26.64 sec: 0.444471 ( -0.06738  0.067621 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.06285e-07 ( -1.43004e-07  1.44162e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -2.768 sec. to   23.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.920801     ( -0.753416   1.28655 )
Epeak [keV] : 95.8954      ( -38.3595 -95.9249 )
Norm@50keV  : 6.91033E-03    ( -0.00375115   0.0234671 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   39.53     using 59 bins.
 Reduced chi-squared = 0.705893
# Null hypothesis probability of 9.53e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 26.64 sec: 0.435409 ( -0.069693  0.0696 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.727e-07 ( -1.58739e-07  1.56629e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    0.868 sec. to    1.868 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.66578     ( -0.357869   0.342401 )
Norm@50keV  : 1.34234E-02    ( -0.00304333   0.0029909 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.41     using 59 bins.
 Reduced chi-squared = 1.07737
# Null hypothesis probability of 3.21e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.76207 ( -0.38008  0.38098 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.24669e-07 ( -2.92093e-08  2.9668e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.868 sec. to    1.868 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.189064     ( -1.70598   3.2731 )
Epeak [keV] : 56.3185      ( -10.9124 -56.0966 )
Norm@50keV  : 8.36988E-02    ( -0.086747   4.73456 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.55     using 59 bins.
 Reduced chi-squared = 1.06339
# Null hypothesis probability of 3.48e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.68166 ( -0.40579  0.39888 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.81008e-08 ( -3.86333e-08  2.33312e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = N/A

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = N/A
S(50-150 keV) = N/A

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

Mask shadow pattern

IMX = -8.849975337905884E-01, IMY = -1.506806050536204E-01

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:
-239.088000 -2.768000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6425  22.0059    0.4  12.2   10.6   9.0684  28.4    0.7	Crab                          
 53.0540   3.8135    2.4  40.9   64.1   5.6578   4.8 ------	UNKNOWN                       
 76.3976  -9.6393    3.3  44.2   24.2   1.9405   3.5 ------	UNKNOWN                       
 75.3891  11.6581    2.2  23.5   33.3   1.8169   5.3 ------	UNKNOWN                       
103.0833  -9.6081    2.6  48.0  -12.3   2.6481   4.5 ------	UNKNOWN                       
132.9999  36.0478    3.0  40.9  -92.0   5.5266   3.9 ------	UNKNOWN                       
146.2888  61.3334    2.7  48.0 -129.1   5.7371   4.2 ------	UNKNOWN                       

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

Time interval of the image:
-2.768000 23.872000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.8285  21.9071    0.0  12.4    9.8  -0.1553  -2.1   12.6	Crab                          
 36.6020  66.6707    1.2  41.9  170.3   1.2996   9.4 ------	UNKNOWN                       
135.2232  42.7403    2.3  41.5 -102.5   1.4355   5.1 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
87.812590 683.512610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6119  21.9961    1.4  53.5   16.5  20.0587   8.1    1.6	Crab                          
308.1847  40.9475    6.8  52.4 -178.4  -3.8866  -1.7    3.4	Cyg X-3                       
325.9663  38.3318   74.7  47.8  164.4  -0.3052  -0.2    9.7	Cyg X-2                       
160.5749  67.6818    3.3  40.0  -76.8   8.2271   3.5 ------	UNKNOWN