GRB211207A: 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: Mon Oct 24 00:10:41 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1088376
======================================================================

  Trigger: 01088376      Segment: 000

  BAT Trigger Time: 660603204.992   [s; MET]
      Trigger Stop: 660603206.016   [s; MET]
               UTC: 2021-12-07T20:52:56.775700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 149.625262667391   Dec: -24.3518427204482  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.77
     Image Trigger?:     NO
     Rate S/N Ratio:     11.4455231422596  [ if not an image trigger ]
     Image S/N Ratio:    7.77

  Analysis Position:   [ source = BAT ]
    RA: 149.625262667391   Dec: -24.3518427204482  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 149.60097305815   Dec: -24.3607187048821  [deg; J2000]  
        { 09h 58m 24.2s , -24d 21' 38.6" }
         +/- 2.27666502515794 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.03095611508269 [arcmin] (formal 1-sigma fit error)
    SNR: 9.39055029531038
 
  Angular difference between the analysis and refined position is 1.430497 arcmin
 
  Partial Coding Fraction: 0.625    [ including projection effects ]

  Duration
     T90: 3.7279999256134 +/- 0.871394276910417
        Measured from: -0.935999989509583
                   to: 2.79199993610382     [s; relative to TRIGTIME]
     T50: 1.68799996376038 +/- 0.709985879650207
        Measured from: 0.0199999809265137
                   to: 1.70799994468689     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.151999950408936     
                   to: 0.848000049591064     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.30400002002716     
                   to: 2.97200000286102     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.094267   0.133822   0.071108   0.002686
           0.016902   0.017988   0.015773   0.013725 [error]
 Peak      0.028238   0.046829   0.033656   0.005259
           0.008531   0.008911   0.008115   0.006863 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    4.276   -1.304    2.972
T90     3.728   -0.936    2.792
T50     1.688    0.020    1.708
Peak    1.000   -0.152    0.848
 
 
====== 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      -1.715    -0.315      0.295       -           -               -         4.68e-03     -8.81e-04          8.51e-04      67.350   57
CPL     -1.698    -1.975      1.260      840.849    -840.839      -840.849      4.78e-03     -9.77e-04          1.72e-02      67.350   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      -1.560     -0.397     0.373       -           -               -         7.33e-03     -1.79e-03          1.76e-03      66.040   57
CPL      0.012     -1.813     3.144       62.868     -14.772       -62.868      4.62e-02     -4.62e-02          1.62e+00      63.920   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   3.13e-08  5.04e-08  6.14e-08  1.47e-07  1.85e-07  2.90e-07   erg/cm2
      90%_error_low -7.71e-09 -8.21e-09 -1.55e-08 -6.45e-08 -3.58e-08 -8.15e-08   erg/cm2
      90%_error_hi   8.12e-09  8.20e-09  1.55e-08  9.04e-08  3.65e-08  1.02e-07   erg/cm2
Peak flux       PL   3.20e-01  3.10e-01  2.11e-01  2.24e-01  9.31e-01  1.06e+00   ph/cm2/s
      90%_error_low -1.10e-01 -7.35e-02 -6.42e-02 -1.11e-01 -2.14e-01 -2.48e-01   ph/cm2/s
      90%_error_hi   1.21e-01  7.29e-02  6.36e-02  1.58e-01  2.14e-01  2.51e-01   ph/cm2/s
 
Fluence        CPL   3.12e-08  5.05e-08  6.15e-08  1.43e-07  1.85e-07  2.86e-07   erg/cm2
      90%_error_low -8.94e-09 -8.28e-09 -1.55e-08 -8.93e-08 -3.91e-08 -1.28e-07   erg/cm2
      90%_error_hi   8.24e-09  1.08e-08  1.63e-08  5.53e-08  3.61e-08  6.00e-08   erg/cm2
Peak flux      CPL   2.41e-01  3.56e-01  2.34e-01  5.90e-02  8.78e-01  8.90e-01   ph/cm2/s
      90%_error_low -2.41e-01 -9.23e-02 -7.84e-02 -5.90e-02 -2.26e-01 -2.36e-01   ph/cm2/s
      90%_error_hi   1.50e-01  9.95e-02  8.04e-02  2.15e-01  2.24e-01  2.91e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  149.6010   -24.3607   0.0204    33.0060     8.9684         0.3040143      9.391 TRIG_01088376                 
 
Foreground time interval of the image:
 -1.304   2.972 (delta_t =   4.276 [sec])
Background time interval of the image:
-239.992  -1.304 (delta_t = 238.688 [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   -1.304 sec. to    2.972 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.71518     ( -0.314738   0.294775 )
Norm@50keV  : 4.67777E-03    ( -0.000881097   0.000850935 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.35     using 59 bins.
 Reduced chi-squared = 1.18158
# Null hypothesis probability of 1.64e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 4.276 sec: 0.624618 ( -0.102047  0.10212 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85011e-07 ( -3.57598e-08  3.65318e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -1.304 sec. to    2.972 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.69842     ( -1.9755   1.25961 )
Epeak [keV] : 840.849      ( -826.61 -826.62 )
Norm@50keV  : 4.77525E-03    ( -0.000981027   0.0172159 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   67.35     using 59 bins.
 Reduced chi-squared = 1.20268
# Null hypothesis probability of 1.42e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 4.276 sec: 0.624207 ( -0.10421  0.102063 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.84756e-07 ( -3.91234e-08  3.6125e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   -0.152 sec. to    0.848 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.56004     ( -0.39674   0.373015 )
Norm@50keV  : 7.33184E-03    ( -0.00179196   0.00175792 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.04     using 59 bins.
 Reduced chi-squared = 1.1586
# Null hypothesis probability of 1.93e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.930918 ( -0.213908  0.214232 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.89334e-08 ( -1.78688e-08  1.83316e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.152 sec. to    0.848 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.0123266     ( -1.82364   3.13305 )
Epeak [keV] : 62.8684      ( -14.6765 -62.7733 )
Norm@50keV  : 4.62132E-02    ( -0.0469938   1.61633 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.92     using 59 bins.
 Reduced chi-squared = 1.14143
# Null hypothesis probability of 2.18e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.878142 ( -0.226049  0.224458 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.27581e-08 ( -1.80115e-08  1.96595e-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 = 6.416148507647752E-01, IMY = -1.012591665025407E-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:
-239.992000 -1.304000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4300 -40.4738    6.1  52.9   12.3   1.6362   1.9    6.6	Vela X-1                      
189.8198  -2.8156    2.4  28.1  -86.6   1.8037   4.8 ------	UNKNOWN                       
188.3276 -19.9533    3.2  35.8  -57.2   1.5307   3.6 ------	UNKNOWN                       
213.4814  36.4109    3.8  55.1 -144.9   5.0286   3.1 ------	UNKNOWN                       

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

Time interval of the image:
-1.304000 2.972000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5550 -40.6035   20.9  52.9   12.1   0.0464   0.6    3.2	Vela X-1                      
133.4481   2.0971    2.3  29.8   69.9   0.2034   5.0 ------	UNKNOWN                       
149.6010 -24.3607    1.2  33.0    9.0   0.3040   9.4 ------	UNKNOWN                       
182.0644  29.1655    2.2  29.4 -158.6   0.1426   5.3 ------	UNKNOWN                       
205.4777  53.4457    2.6  58.6 -166.0   0.5559   4.5 ------	UNKNOWN                       
196.9903 -25.0231    2.1  45.2  -59.4   0.5052   5.3 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
64.708610 962.039800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5058 -40.5751    1.0  20.1    6.1   8.1694  11.7    1.6	Vela X-1                      
170.4575 -60.4927    5.9  38.9  -42.8   2.5294   1.9    8.9	Cen X-3                       
186.5932 -62.6475    9.1  45.5  -49.4   3.0272   1.3    7.6	GX 301-2                      
 92.5683 -33.0337    4.2  50.2   39.7  12.3287   2.7 ------	UNKNOWN                       
156.5385  28.8356    3.4  53.6  160.9  10.2342   3.4 ------	UNKNOWN                       
164.6153  26.2338    4.1  52.6  170.3   6.4796   2.9 ------	UNKNOWN                       
145.9252  -6.8460    3.8  17.9  141.3   2.1546   3.0 ------	UNKNOWN                       
187.8417  -3.8507    2.3  42.1 -139.7   6.5832   5.0 ------	UNKNOWN                       
193.6214  14.6383    3.0  58.0 -154.2  16.1165   3.8 ------	UNKNOWN