GRB201216C: 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 00:44:12 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1013243
======================================================================

  Trigger: 01013243      Segment: 000

  BAT Trigger Time: 629852877.888   [s; MET]
      Trigger Stop: 629852878.912   [s; MET]
               UTC: 2020-12-16T23:07:31.722580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 16.3578584277706   Dec: 16.5367566216723  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    15.28
     Image Trigger?:     NO
     Rate S/N Ratio:     69.3181073024935  [ if not an image trigger ]
     Image S/N Ratio:    15.28

  Analysis Position:   [ source = BAT ]
    RA: 16.3578584277706   Dec: 16.5367566216723  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 16.3642081338901   Dec: 16.5373096769384  [deg; J2000]  
        { 01h 05m 27.4s , +16d 32' 14.3" }
         +/- 0.838171682628201 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.349467130903331 [arcmin] (formal 1-sigma fit error)
    SNR: 39.1419707635121
 
  Angular difference between the analysis and refined position is 0.366728 arcmin
 
  Partial Coding Fraction: 0.1855469    [ including projection effects ]

  Duration
     T90: 48 +/- 16
        Measured from: -15.8880000114441
                   to: 32.1119999885559     [s; relative to TRIGTIME]
     T50: 16 +/- 16
        Measured from: 0.111999988555908
                   to: 16.1119999885559     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 23.6119999885559     
                   to: 24.6119999885559     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15.8880000114441     
                   to: 64.1119999885559     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    13.011278  21.400002  19.895172   7.022695
           0.215753   0.248750   0.236082   0.185725 [error]
 Peak      0.497473   0.712465   0.507836   0.174677
           0.031855   0.037310   0.033662   0.024588 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   80.000  -15.888   64.112
T90    48.000  -15.888   32.112
T50    16.000    0.112   16.112
Peak    1.000   23.612   24.612
 
 
====== 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      -1.435    -0.030      0.030       -           -               -         5.88e-02     -9.95e-04          9.94e-04      41.820   57
CPL     -1.323    -0.090      0.124      379.489    -165.530      -379.489      6.52e-02     -6.63e-03          7.82e-03      39.390   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      -1.747     -0.104     0.102       -           -               -         1.34e-01     -8.34e-03          8.30e-03      49.210   57
CPL     -1.371     -0.404     0.443       85.627     -22.935       -85.627      2.06e-01     -7.45e-02          1.34e-01      46.720   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   5.65e-06  1.08e-05  1.60e-05  5.08e-05  4.51e-05  8.32e-05   erg/cm2
      90%_error_low -2.07e-07 -2.37e-07 -2.76e-07 -2.02e-06 -7.31e-07 -2.09e-06   erg/cm2
      90%_error_hi   2.10e-07  2.36e-07  2.76e-07  2.08e-06  7.30e-07  2.13e-06   erg/cm2
Peak flux       PL   6.97e+00  6.06e+00  3.61e+00  3.24e+00  1.80e+01  1.99e+01   ph/cm2/s
      90%_error_low -6.91e-01 -3.84e-01 -2.83e-01 -4.82e-01 -1.13e+00 -1.19e+00   ph/cm2/s
      90%_error_hi   7.12e-01  3.82e-01  2.81e-01  5.25e-01  1.13e+00  1.19e+00   ph/cm2/s
 
Fluence        CPL   5.45e-06  1.08e-05  1.62e-05  4.51e-05  4.50e-05  7.76e-05   erg/cm2
      90%_error_low -2.89e-07 -2.40e-07 -3.60e-07 -5.43e-06 -7.55e-07 -5.43e-06   erg/cm2
      90%_error_hi   2.94e-07  2.40e-07  3.61e-07  6.18e-06  7.53e-07  4.55e-06   erg/cm2
Peak flux      CPL   6.50e+00  6.28e+00  3.75e+00  2.21e+00  1.78e+01  1.87e+01   ph/cm2/s
      90%_error_low -8.42e-01 -4.48e-01 -3.23e-01 -7.46e-01 -1.17e+00 -1.45e+00   ph/cm2/s
      90%_error_hi   8.63e-01  4.56e-01  3.30e-01  1.16e+00  1.17e+00  1.63e+00   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   16.3642    16.5373   0.0049    52.0287   -21.5613        65.8487229     39.142 TRIG_01013243                 
 
Foreground time interval of the image:
-15.888  64.112 (delta_t =  80.000 [sec])
Background time interval of the image:
-64.787 -15.888 (delta_t =  48.899 [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  -15.888 sec. to   64.112 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.43475     ( -0.0300528   0.0301378 )
Norm@50keV  : 5.87778E-02    ( -0.000995505   0.000994116 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   41.82     using 59 bins.
 Reduced chi-squared = 0.733684
# Null hypothesis probability of 9.34e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 80 sec: 7.21670 ( -0.1462  0.14677 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.51315e-05 ( -7.30802e-07  7.30163e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -15.888 sec. to   64.112 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.32336     ( -0.0898119   0.124266 )
Epeak [keV] : 379.489      ( -166.024 -379.982 )
Norm@50keV  : 6.52175E-02    ( -0.00661928   0.00782546 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   39.39     using 59 bins.
 Reduced chi-squared = 0.703393
# Null hypothesis probability of 9.55e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 80 sec: 3.53302 ( -0.27854  0.41676 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.49614e-05 ( -7.54547e-07  7.5264e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   23.612 sec. to   24.612 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.74652     ( -0.103787   0.101919 )
Norm@50keV  : 0.133576    ( -0.00833673   0.00829755 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   49.21     using 59 bins.
 Reduced chi-squared = 0.863333
# Null hypothesis probability of 7.59e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 18.0394 ( -1.1323  1.1346 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23299e-06 ( -7.9032e-08  7.93005e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   23.612 sec. to   24.612 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.3712     ( -0.403578   0.443034 )
Epeak [keV] : 85.6267      ( -22.9349 -85.6268 )
Norm@50keV  : 0.205916    ( -0.0745458   0.133715 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.72     using 59 bins.
 Reduced chi-squared = 0.834286
# Null hypothesis probability of 8.07e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 17.7512 ( -1.1717  1.1748 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.21143e-06 ( -8.35575e-08  8.32129e-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 = 1.191606335249240E+00, IMY = 4.708600849302003E-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:
-64.787400 -15.888000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6412  22.0336    0.7  22.4   91.8   2.2309  16.4    1.2	Crab                          
 84.7449  26.3161    0.8  26.2   86.7   2.4201  15.3 ------	UNKNOWN                       
 21.5259  15.7663    3.4  47.0  -21.8   0.7208   3.4 ------	UNKNOWN                       
 67.5302 -35.4626    2.8  40.8 -127.5   0.9369   4.2 ------	UNKNOWN                       
 10.4449  12.4666    3.2  57.5  -27.0   2.5209   3.7 ------	UNKNOWN                       
 73.5303 -43.5646    4.2  49.1 -133.4   1.4418   2.8 ------	UNKNOWN                       

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

Time interval of the image:
-15.888000 64.112000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.4850  22.0597    4.9  22.3   91.5  -1.0470  -2.3    8.7	Crab                          
 81.9503  40.5093    3.5  37.3   68.9   2.1667   3.3 ------	UNKNOWN                       
 55.4331  50.9856    2.8  46.9   40.5   3.9919   4.2 ------	UNKNOWN                       
113.0326   7.4604    3.3  44.5  136.4   3.2678   3.6 ------	UNKNOWN                       
113.6999 -10.7283    2.6  48.0  161.2   3.5870   4.4 ------	UNKNOWN                       
 90.7644   8.6557    2.4  22.6  131.8   2.0142   4.9 ------	UNKNOWN                       
 79.9221   8.8076    4.1  12.1  124.2   1.0963   2.9 ------	UNKNOWN                       
 70.1673   8.8767    4.1   4.0   79.4   1.0914   2.8 ------	UNKNOWN                       
 15.2071  36.5044    2.5  57.6    2.0   9.6282   4.5 ------	UNKNOWN                       
116.7305 -27.2148    3.1  57.0  179.1   7.2170   3.7 ------	UNKNOWN                       
 67.8460 -12.7408    2.3  18.1 -127.1   2.2652   5.0 ------	UNKNOWN                       
 76.1814 -21.9285    2.8  28.3 -144.0   2.2308   4.1 ------	UNKNOWN                       
 16.3642  16.5373    0.3  52.0  -21.6  65.8426  39.1 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
626.412590 962.222000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
139.2370 -32.3417    3.7  56.8   -1.8   4.1336   3.1 ------	UNKNOWN                       
154.7482 -30.6369    3.6  56.5  -17.7   4.0381   3.2 ------	UNKNOWN                       
168.2581   1.0350    2.6  34.9  -56.0   2.4006   4.5 ------	UNKNOWN