GRB191029A

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 v2.46
    Process Start Time: Wed Nov 27 12:05:21 EST 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger932058
======================================================================

  Trigger: 00932058      Segment: 000

  BAT Trigger Time: 594040544   [s; MET]
      Trigger Stop: 594040608   [s; MET]
               UTC: 2019-10-29T11:15:20.169860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 352.139953073243   Dec: -40.4638223155307  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.55
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    9.55

  Analysis Position:   [ source = BAT ]
    RA: 352.139953073243   Dec: -40.4638223155307  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 352.205160689833   Dec: -40.4262989253924  [deg; J2000]  
        { 23h 28m 49.2s , -40d 25' 34.7" }
         +/- 3.91663171781931 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.19676018979847 [arcmin] (formal 1-sigma fit error)
    SNR: 4.32613616600902
 
  Angular difference between the analysis and refined position is 3.732863 arcmin
 
  Partial Coding Fraction: 0.4609375    [ including projection effects ]

  Duration
     T90: 41 +/- 8.24621125123532
        Measured from: -3
                   to: 38     [s; relative to TRIGTIME]
     T50: 14 +/- 13.1529464379659
        Measured from: 2
                   to: 16     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2     
                   to: 3     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4     
                   to: 42     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.552913   0.752235   0.458679   0.041561
           0.065408   0.068608   0.061647   0.057073 [error]
 Peak      0.013715   0.077837   0.020528   0.008309
           0.010319   0.010660   0.009566   0.008677 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   46.000   -4.000   42.000
T90    41.000   -3.000   38.000
T50    14.000    2.000   16.000
Peak    1.000    2.000    3.000
 
 
====== 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: PL)
 
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      -1.788    -0.201      0.193       -           -               -         2.63e-03     -3.28e-04          3.21e-04      51.030   57
CPL     -1.266    -0.845      0.927       64.021      N/A           N/A         5.05e-03        N/A               N/A         49.730   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      -1.637     -0.395     0.383       -           -               -         7.99e-03     -2.15e-03          2.12e-03      74.840   57
CPL      1.260      0.980    -1.260       44.227     -10.714        -0.462      3.93e-01     -3.93e-01          1.15e+05      68.400   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   2.02e-07  3.12e-07  3.62e-07  8.05e-07  1.11e-06  1.68e-06   erg/cm2
      90%_error_low -3.23e-08 -3.33e-08 -6.09e-08 -2.46e-07 -1.41e-07 -3.12e-07   erg/cm2
      90%_error_hi   3.35e-08  3.33e-08  6.13e-08  3.09e-07  1.43e-07  3.61e-07   erg/cm2
Peak flux       PL   3.75e-01  3.48e-01  2.24e-01  2.22e-01  1.04e+00  1.17e+00   ph/cm2/s
      90%_error_low -1.32e-01 -8.85e-02 -7.29e-02 -1.12e-01 -2.60e-01 -2.95e-01   ph/cm2/s
      90%_error_hi   1.42e-01  8.81e-02  7.42e-02  1.65e-01  2.61e-01  2.98e-01   ph/cm2/s
 
Fluence        CPL   1.90e-07  3.31e-07  3.64e-07  3.57e-07  1.06e-06  1.24e-06   erg/cm2
      90%_error_low -3.80e-08 -4.11e-08 -6.65e-08 -2.40e-07 -1.56e-07 -2.94e-07   erg/cm2
      90%_error_hi   3.82e-08  4.52e-08  6.59e-08  5.33e-07  1.61e-07  5.78e-07   erg/cm2
Peak flux      CPL   1.68e-01  6.15e-01  6.79e-02  9.08e-06  8.51e-01  8.51e-01   ph/cm2/s
      90%_error_low -6.04e-02 -1.50e-01 -3.87e-02 -9.08e-06 -1.98e-01 -1.98e-01   ph/cm2/s
      90%_error_hi   1.77e-01  1.41e-01  1.18e-01  4.39e-03  2.50e-01  2.50e-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
  352.2052   -40.4263   0.0445    33.5627    38.6030         1.2661547      4.326 TRIG_00932058                 
 
Foreground time interval of the image:
 -4.000  42.000 (delta_t =  46.000 [sec])
Background time interval of the image:
-15.499  -4.000 (delta_t =  11.499 [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

Bokeh Plot

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   -4.000 sec. to   42.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.78766     ( -0.201218   0.19276 )
Norm@50keV  : 2.62858E-03    ( -0.000327657   0.000321033 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.03 using 59 PHA bins.
# Reduced chi-squared =         0.8953 for     57 degrees of freedom 
# Null hypothesis probability =   6.973786e-01
 
Photon flux (15-150 keV)    in 46 sec: 0.360513 ( -0.038719  0.038741 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.11385e-06 ( -1.40618e-07  1.43067e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -4.000 sec. to   42.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.26613     ( -0.844716   0.926784 )
Epeak [keV] : 64.0214      (   )
Norm@50keV  : 5.04871E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.73 using 59 PHA bins.
# Reduced chi-squared =         0.8880 for     56 degrees of freedom 
# Null hypothesis probability =   7.098202e-01
 
Photon flux (15-150 keV)    in 46 sec: 0.352452 ( -0.04063  0.040477 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.0626e-06 ( -1.56325e-07  1.61028e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    2.000 sec. to    3.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.63692     ( -0.39632   0.381328 )
Norm@50keV  : 7.99183E-03    ( -0.00214923   0.00211865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.84 using 59 PHA bins.
# Reduced chi-squared =          1.313 for     57 degrees of freedom 
# Null hypothesis probability =   5.660256e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.03904 ( -0.2603  0.26077 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.44629e-08 ( -2.07003e-08  2.13977e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.000 sec. to    3.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 8.67301     ( -6.48251   -8.72244 )
Epeak [keV] : 37.3595      ( -3.82489 6.42644 )
Norm@50keV  : 1.47215E+04    ( -17526.7   97120.8 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.10 using 59 PHA bins.
# Reduced chi-squared =          1.145 for     56 degrees of freedom 
# Null hypothesis probability =   2.137983e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.850775 ( -0.19772  0.250265 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.66477e-08 ( -1.09056e-08  1.46099e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 41.0 sec.
Hardness ratio (energy fluence ratio) = 1.15859063576

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

S(15-50 keV)  = 5.145642e-07
S(50-150 keV) = 5.992836e-07

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 = 5.184863409307890E-01, IMY = -4.139467303931342E-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:
-15.499410 -4.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.2399 -60.4998    6.9  46.1 -128.6   0.2850   1.7    7.7	Cen X-3

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

Time interval of the image:
-4.000000 42.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.2812 -60.4869    6.6  46.1 -128.6  -1.2884  -1.8    8.2	Cen X-3                       
333.6920 -31.0143    2.4  46.1   18.8   1.9977   4.7 ------	UNKNOWN                       
128.2038 -46.2766    2.4  53.3 -164.6   2.7420   4.8 ------	UNKNOWN                       
227.6147 -66.0512    2.4  39.3  -92.0   3.5974   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
73.500580 151.900590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.5863 -60.6605    5.6  46.5 -127.2   1.0473   2.1    8.3	Cen X-3                       
 35.4165 -33.0748    3.2  40.9   97.9   1.8266   3.6 ------	UNKNOWN                       
337.9069 -38.3095    2.3  37.7   21.4   0.9913   5.0 ------	UNKNOWN                       
314.8872 -30.2040    2.1  51.3   -0.9   1.4741   5.4 ------	UNKNOWN                       
289.6486 -38.9508    2.3  50.8  -29.9   2.1061   5.1 ------	UNKNOWN

Analysis Summary

Notes:

Image

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

Light Curves

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:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

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

Mask shadow pattern

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

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

Post-slew image of 15-350 keV band

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