Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time: Fri Jul 29 23:29:00 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1044382
======================================================================

  Trigger: 01044382      Segment: 000

  BAT Trigger Time: 640636504   [s; MET]
      Trigger Stop: 640636568   [s; MET]
               UTC: 2021-04-20T18:34:37.120380    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 254.360983528566   Dec: 42.5571753858575  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.66
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.66

  Analysis Position:   [ source = BAT ]
    RA: 254.360983528566   Dec: 42.5571753858575  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 254.319248237532   Dec: 42.5675160368958  [deg; J2000]  
        { 16h 57m 16.6s , +42d 34' 03.1" }
         +/- 2.13658210707974 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.09994493449598 [arcmin] (formal 1-sigma fit error)
    SNR: 10.2823030220112
 
  Angular difference between the analysis and refined position is 1.945947 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 158.160000085831 +/- 29.6897030356576
        Measured from: -12.8400000333786
                   to: 145.320000052452     [s; relative to TRIGTIME]
     T50: 74.0640000104904 +/- 19.7721242218422
        Measured from: 14.8880000114441
                   to: 88.9520000219345     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 21.0199999809265     
                   to: 22.0199999809265     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.3040000200272     
                   to: 160.136000037193     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.627133   0.872941   0.742785   0.193734
           0.089420   0.091601   0.080209   0.069551 [error]
 Peak      0.024451   0.018113   0.010655   0.002775
           0.007125   0.007115   0.006145   0.005552 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  181.440  -21.304  160.136
T90   158.160  -12.840  145.320
T50    74.064   14.888   88.952
Peak    1.000   21.020   22.020
 
 
====== 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      -1.471    -0.191      0.189       -           -               -         8.73e-04     -9.81e-05          9.75e-05      48.100   57
CPL     -0.963    -0.638      0.924      101.999     -37.881      -101.999      1.58e-03     -7.72e-04          2.74e-03      46.790   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      -2.119     -0.934     0.679       -           -               -         3.16e-03     -1.71e-03          1.51e-03      61.870   57
CPL     -2.219     -1.008     3.113       95.098      N/A           N/A         2.67e-03        N/A               N/A         61.810   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   1.97e-07  3.68e-07  5.31e-07  1.63e-06  1.51e-06  2.72e-06   erg/cm2
      90%_error_low -3.55e-08 -4.21e-08 -7.74e-08 -4.53e-07 -1.86e-07 -5.23e-07   erg/cm2
      90%_error_hi   3.72e-08  4.18e-08  7.69e-08  5.59e-07  1.89e-07  6.10e-07   erg/cm2
Peak flux       PL   2.37e-01  1.66e-01  7.62e-02  4.90e-02  5.02e-01  5.28e-01   ph/cm2/s
      90%_error_low -1.08e-01 -6.09e-02 -4.90e-02 -4.90e-02 -1.70e-01 -1.82e-01   ph/cm2/s
      90%_error_hi   1.15e-01  5.74e-02  5.23e-02  9.07e-02  1.70e-01  1.84e-01   ph/cm2/s
 
Fluence        CPL   1.81e-07  3.88e-07  5.48e-07  7.86e-07  1.45e-06  1.90e-06   erg/cm2
      90%_error_low -4.30e-08 -5.11e-08 -8.38e-08 -4.86e-07 -2.05e-07 -5.30e-07   erg/cm2
      90%_error_hi   4.37e-08  5.32e-08  8.58e-08  9.99e-07  2.07e-07  1.04e-06   erg/cm2
Peak flux      CPL   2.27e-01  1.12e-01  3.14e-02  1.41e-02  3.84e-01  4.02e-01   ph/cm2/s
      90%_error_low -1.21e-01 -1.12e-01 -3.14e-02 -1.41e-02 -2.08e-01 -2.96e-01   ph/cm2/s
      90%_error_hi   1.21e-01  1.23e-01  8.26e-02  7.93e-02  2.82e-01  3.08e-01   ph/cm2/s
 
======================================================================
  • Special notes of this burst




    Image

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

    #   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  254.3192    42.5675   0.0188    27.0766    11.9744         1.4358452     10.282 TRIG_01044382                 
 
Foreground time interval of the image:
-14.299  74.301 (delta_t =  88.600 [sec])
Background time interval of the image:




    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

    Bokeh Plot

    Other quick-look light curves:




    Spectra

    Notes:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from  -21.304 sec. to  160.136 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.47066     ( -0.191135   0.18924 )
Norm@50keV  : 8.73005E-04    ( -9.80937e-05   9.75057e-05 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.10     using 59 bins.
 Reduced chi-squared = 0.84386
# Null hypothesis probability of 7.93e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 181.4 sec: 0.108151 ( -0.0119674  0.011983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51e-06 ( -1.8643e-07  1.88545e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -21.304 sec. to  160.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.963259     ( -0.637882   0.923551 )
Epeak [keV] : 101.999      ( -37.8818 -101.999 )
Norm@50keV  : 1.57717E-03    ( -0.000771777   0.00274121 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.79     using 59 bins.
 Reduced chi-squared = 0.835536
# Null hypothesis probability of 8.05e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 181.4 sec: 0.105752 ( -0.0124863  0.012505 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45217e-06 ( -2.05454e-07  2.0691e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   21.020 sec. to   22.020 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.11944     ( -0.933715   0.678538 )
Norm@50keV  : 3.16189E-03    ( -0.0017101   0.00150599 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.87     using 59 bins.
 Reduced chi-squared = 1.08544
# Null hypothesis probability of 3.06e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.502319 ( -0.169728  0.169737 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.94408e-08 ( -1.26493e-08  1.36416e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   21.020 sec. to   22.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.89151     ( -0.333503   3.78773 )
Epeak [keV] : 281.185      (   )
Norm@50keV  : 1.33891E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.61     using 59 bins.
 Reduced chi-squared = 1.10018
# Null hypothesis probability of 2.82e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.384059 ( -0.207679  0.281689 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.98119e-08 ( -1.01842e-08  1.1395e-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 = 5.000862298625791E-01, IMY = -1.060633959254108E-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:

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

    Time interval of the image:
-14.299400 74.300600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5784  35.3883    3.5  32.9   20.4   0.5732   3.3    6.5	Her X-1                       
299.4821  35.0340    6.7  55.8  -21.7   0.8595   1.8   11.4	Cyg X-1                       
254.3192  42.5675    1.1  27.1   12.0   1.4362  10.3 ------	UNKNOWN                       
110.4945  51.7444    2.6  55.3 -144.7   3.0987   4.4 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
124.300590 718.602900
721.000000 963.094800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4023  35.2971    7.1   7.3   41.2   0.9663   1.6    3.8	Her X-1                       
268.3934  -1.3997    8.4  45.7   21.7   1.6885   1.4    3.5	SW J1753.5-0127               
288.8918  11.0169   11.2  43.5  -12.4   1.1408   1.0    7.0	GRS 1915+105                  
299.6124  35.2361    1.7  35.5  -52.1   7.0063   6.8    2.3	Cyg X-1                       
308.1752  40.9278    5.0  39.5  -65.0   3.9160   2.3    3.3	Cyg X-3                       
274.6911 -10.0521    2.9  55.8   17.1  11.4604   3.9 ------	UNKNOWN                       
272.8521  22.2216    3.6  25.5   -1.5   2.1259   3.2 ------	UNKNOWN                       
156.7287  60.9533    3.5  57.1 -173.5   8.3253   3.3 ------	UNKNOWN                       
306.8168  16.0796    2.8  51.8  -34.4   8.2587   4.0 ------	UNKNOWN