GRB210212A: 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 00:09:31 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1032183
======================================================================

  Trigger: 01032183      Segment: 000

  BAT Trigger Time: 634796744.512   [s; MET]
      Trigger Stop: 634796760.896   [s; MET]
               UTC: 2021-02-12T04:25:18.019800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 72.2609556926666   Dec: 7.23375771191397  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.13
     Image Trigger?:     NO
     Rate S/N Ratio:     10.770329614269  [ if not an image trigger ]
     Image S/N Ratio:    7.13

  Analysis Position:   [ source = BAT ]
    RA: 72.2609556926666   Dec: 7.23375771191397  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 72.2502988328754   Dec: 7.21575385417514  [deg; J2000]  
        { 04h 49m 00.1s , +07d 12' 56.7" }
         +/- 1.89965894570356 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.735885674500343 [arcmin] (formal 1-sigma fit error)
    SNR: 12.162149203371
 
  Angular difference between the analysis and refined position is 1.252709 arcmin
 
  Partial Coding Fraction: 1.03125    [ including projection effects ]

  Duration
     T90: 80 +/- 35.7770876399966
        Measured from: -15.5119999647141
                   to: 64.4880000352859     [s; relative to TRIGTIME]
     T50: 32 +/- 22.6274169979695
        Measured from: 0.48800003528595
                   to: 32.4880000352859     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 7.98800003528595     
                   to: 8.98800003528595     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15.5119999647141     
                   to: 80.4880000352859     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.545028   0.610257   0.288170   0.108470
           0.062161   0.063891   0.055665   0.048490 [error]
 Peak      0.021733   0.021777   0.017574  -0.001469
           0.006587   0.006743   0.005777   0.004692 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   96.000  -15.512   80.488
T90    80.000  -15.512   64.488
T50    32.000    0.488   32.488
Peak    1.000    7.988    8.988
 
 
====== 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      -1.846    -0.235      0.223       -           -               -         9.08e-04     -1.37e-04          1.34e-04      83.080   57
CPL     -1.836    -0.834      1.040      532.943    -532.933      -532.943      9.21e-04     -1.50e-04          1.92e-03      83.080   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      -1.646     -0.533     0.488       -           -               -         3.88e-03     -1.29e-03          1.24e-03      45.000   57
CPL     -0.840     -1.392     2.902       65.040     -52.116       -65.040      1.08e-02     -1.08e-02          3.60e-01      44.530   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   1.54e-07  2.29e-07  2.55e-07  5.36e-07  8.01e-07  1.18e-06   erg/cm2
      90%_error_low -2.64e-08 -2.75e-08 -5.22e-08 -1.92e-07 -1.19e-07 -2.53e-07   erg/cm2
      90%_error_hi   2.70e-08  2.75e-08  5.33e-08  2.54e-07  1.23e-07  3.03e-07   erg/cm2
Peak flux       PL   1.84e-01  1.69e-01  1.08e-01  1.06e-01  5.06e-01  5.68e-01   ph/cm2/s
      90%_error_low -7.57e-02 -4.95e-02 -4.49e-02 -6.62e-02 -1.46e-01 -1.69e-01   ph/cm2/s
      90%_error_hi   8.20e-02  4.93e-02  4.52e-02  1.09e-01  1.46e-01  1.73e-01   ph/cm2/s
 
Fluence        CPL   1.54e-07  2.12e-07  2.29e-07  5.50e-07  7.46e-07  1.15e-06   erg/cm2
      90%_error_low -2.64e-08 -4.38e-08 -4.47e-08 -3.12e-07 -1.50e-07 -1.11e-06   erg/cm2
      90%_error_hi   2.75e-08  3.66e-08  3.15e-08  7.17e-08  1.16e-07  1.63e-07   erg/cm2
Peak flux      CPL   1.67e-01  1.86e-01  1.12e-01  4.17e-02  4.94e-01  5.07e-01   ph/cm2/s
      90%_error_low -1.67e-01 -5.48e-02 -5.27e-02 -4.17e-02 -1.50e-01 -1.61e-01   ph/cm2/s
      90%_error_hi   9.15e-02  6.85e-02  5.22e-02  9.08e-02  1.49e-01  1.67e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   72.2503     7.2158   0.0159     5.2505   -65.0454         1.4939900     12.162 TRIG_01032183                 
 
Foreground time interval of the image:
-15.512  67.589 (delta_t =  83.101 [sec])
Background time interval of the image:
-239.512 -15.512 (delta_t = 224.000 [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  -15.512 sec. to   80.488 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.84622     ( -0.235439   0.223366 )
Norm@50keV  : 9.07576E-04    ( -0.000137411   0.000133529 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   83.08     using 59 bins.
 Reduced chi-squared = 1.45754
# Null hypothesis probability of 1.37e-02 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 96 sec: 0.127381 ( -0.015202  0.015203 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.01311e-07 ( -1.19347e-07  1.22645e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -15.512 sec. to   80.488 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.83569     ( -0.829999   1.04404 )
Epeak [keV] : 532.943      ( -9988.61 -9988.62 )
Norm@50keV  : 9.20720E-04    ( -0.000136974   0.00192961 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   83.08     using 59 bins.
 Reduced chi-squared = 1.48357
# Null hypothesis probability of 1.09e-02 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 96 sec: 0.127377 ( -0.015834  0.015203 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.46193e-07 ( -1.4954e-07  1.16272e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    7.988 sec. to    8.988 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.64594     ( -0.532885   0.487861 )
Norm@50keV  : 3.87681E-03    ( -0.00129383   0.00123844 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.00     using 59 bins.
 Reduced chi-squared = 0.789474
# Null hypothesis probability of 8.75e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.505559 ( -0.146358  0.14639 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.60753e-08 ( -1.22828e-08  1.28496e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    7.988 sec. to    8.988 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.839565     ( -1.39206   2.90191 )
Epeak [keV] : 65.0401      ( -52.1155 -65.0399 )
Norm@50keV  : 1.07753E-02    ( -0.0107755   0.360292 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.53     using 59 bins.
 Reduced chi-squared = 0.795179
# Null hypothesis probability of 8.65e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.493638 ( -0.149705  0.149451 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.36574e-08 ( -1.23657e-08  1.4079e-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 = 3.877095071584416E-02, IMY = 8.331681337943837E-02

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:
-239.512000 -15.512000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6511  22.0146    0.3  17.5   27.6   9.5857  35.1    1.0	Crab                          
 74.0320 -20.5541    2.4  26.4 -165.5   1.2649   4.7 ------	UNKNOWN                       
 46.6734 -41.8727    4.8  55.1 -144.9   4.8850   2.4 ------	UNKNOWN                       

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

Time interval of the image:
-15.512000 67.588600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6996  22.0340    6.4  17.5   27.7  -0.2393  -1.8    3.9	Crab                          
 73.6632  43.4436    2.1  37.9    3.3   1.0649   5.4 ------	UNKNOWN                       
 77.9158 -12.9506    2.3  18.6 -174.3   0.6718   5.1 ------	UNKNOWN                       
 72.2503   7.2157    0.9   5.3  -65.0   1.4939  12.2 ------	UNKNOWN                       
 39.7428 -16.1475    2.3  43.1 -113.4   2.4307   4.9 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
91.588610 928.988610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6601  22.0208    0.8  18.4   47.7  33.7064  15.2    1.5	Crab                          
101.8574   2.9257    2.7  29.8  109.1  12.3977   4.3 ------	UNKNOWN                       
 41.7647  55.5876    3.0  54.1   -8.5  22.5806   3.8 ------	UNKNOWN                       
 30.8701  45.8224    3.3  52.5  -23.3  22.7887   3.5 ------	UNKNOWN                       
 40.0926 -18.0578    3.6  40.6 -116.7  20.2243   3.2 ------	UNKNOWN                       
 24.8602  26.5700    2.6  48.9  -48.6  46.1594   4.4 ------	UNKNOWN