GRB221110A

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: Fri Oct 13 23:04:59 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1136936
======================================================================

  Trigger: 01136936      Segment: 000

  BAT Trigger Time: 689740127.744   [s; MET]
      Trigger Stop: 689740128.768   [s; MET]
               UTC: 2022-11-10T02:28:17.554360    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 29.119436251407   Dec: -27.3142945105164  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.01
     Image Trigger?:     NO
     Rate S/N Ratio:     13.3790881602597  [ if not an image trigger ]
     Image S/N Ratio:    8.01

  Analysis Position:   [ source = BAT ]
    RA: 29.119436251407   Dec: -27.3142945105164  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 29.1062888163036   Dec: -27.2978740488483  [deg; J2000]  
        { 01h 56m 25.5s , -27d 17' 52.3" }
         +/- 1.49055158073503 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.58223831507813 [arcmin] (formal 1-sigma fit error)
    SNR: 17.1980732777021
 
  Angular difference between the analysis and refined position is 1.209130 arcmin
 
  Partial Coding Fraction: 0.7578125    [ including projection effects ]

  Duration
     T90: 8.9799998998642 +/- 2.10693811743884
        Measured from: 0.0680000782012939
                   to: 9.04799997806549     [s; relative to TRIGTIME]
     T50: 3.83999991416931 +/- 0.763319060963741
        Measured from: 1.26400005817413
                   to: 5.10399997234344     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.516000032424927     
                   to: 1.51600003242493     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.407999992370605     
                   to: 9.73600006103516     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.219329   0.303421   0.236461   0.038376
           0.024125   0.025741   0.023010   0.018689 [error]
 Peak      0.036697   0.061989   0.043458  -0.000344
           0.007906   0.008469   0.007786   0.005960 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   10.144   -0.408    9.736
T90     8.980    0.068    9.048
T50     3.840    1.264    5.104
Peak    1.000    0.516    1.516
 
 
====== 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      -1.415    -0.163      0.162       -           -               -         5.24e-03     -4.93e-04          4.90e-04      45.990   57
CPL     -1.276    -0.412      0.700      261.800    -261.800      -261.800      6.16e-03     -2.13e-03          7.51e-03      45.850   56
 
 
=== 1-s peak 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      -1.571     -0.279     0.267       -           -               -         8.89e-03     -1.66e-03          1.63e-03      59.290   57
CPL      0.241     -1.448     2.116       55.005     -11.369        45.864      8.85e-02     -8.85e-02          1.11e+00      54.500   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   6.26e-08  1.21e-07  1.82e-07  5.90e-07  5.12e-07  9.55e-07   erg/cm2
      90%_error_low -9.72e-09 -1.17e-08 -2.23e-08 -1.42e-07 -5.38e-08 -1.61e-07   erg/cm2
      90%_error_hi   1.01e-08  1.16e-08  2.22e-08  1.70e-07  5.44e-08  1.85e-07   erg/cm2
Peak flux       PL   3.92e-01  3.78e-01  2.54e-01  2.68e-01  1.13e+00  1.29e+00   ph/cm2/s
      90%_error_low -9.52e-02 -6.46e-02 -5.93e-02 -1.04e-01 -1.91e-01 -2.27e-01   ph/cm2/s
      90%_error_hi   1.00e-01  6.45e-02  5.94e-02  1.35e-01  1.91e-01  2.31e-01   ph/cm2/s
 
Fluence        CPL   6.12e-08  1.23e-07  1.84e-07  4.70e-07  5.06e-07  8.38e-07   erg/cm2
      90%_error_low -1.16e-08 -1.32e-08 -2.35e-08 -2.88e-07 -6.03e-08 -2.92e-07   erg/cm2
      90%_error_hi   1.05e-08  1.47e-08  2.42e-08  1.54e-07  5.86e-08  2.87e-07   erg/cm2
Peak flux      CPL   3.14e-01  4.61e-01  2.64e-01  4.53e-02  1.08e+00  1.08e+00   ph/cm2/s
      90%_error_low -1.21e-01 -9.23e-02 -7.83e-02 -4.53e-02 -1.96e-01 -2.01e-01   ph/cm2/s
      90%_error_hi   1.21e-01  9.61e-02  7.49e-02  1.30e-01  1.97e-01  2.13e-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
   29.1063   -27.2979   0.0112    17.6978   -68.5708         0.8305010     17.198 TRIG_01136936                 
 
Foreground time interval of the image:
 -0.408   9.736 (delta_t =  10.144 [sec])
Background time interval of the image:
-239.744  -0.408 (delta_t = 239.336 [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   -0.408 sec. to    9.736 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.41483     ( -0.163191   0.161927 )
Norm@50keV  : 5.23574E-03    ( -0.000492738   0.000490232 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.99     using 59 bins.
 Reduced chi-squared = 0.806842
# Null hypothesis probability of 8.52e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 10.14 sec: 0.639806 ( -0.059267  0.059333 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.11526e-07 ( -5.38191e-08  5.44495e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.408 sec. to    9.736 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.27596     ( -0.411718   0.700034 )
Epeak [keV] : 261.800      ( -261.826 -261.826 )
Norm@50keV  : 6.15882E-03    ( -0.00212731   0.00751026 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.85     using 59 bins.
 Reduced chi-squared = 0.81875
# Null hypothesis probability of 8.32e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 10.14 sec: 0.636102 ( -0.061696  0.061419 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.05881e-07 ( -6.02572e-08  5.85987e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.516 sec. to    1.516 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.57113     ( -0.279067   0.267204 )
Norm@50keV  : 8.88504E-03    ( -0.00165935   0.00162996 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.29     using 59 bins.
 Reduced chi-squared = 1.04018
# Null hypothesis probability of 3.92e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.13183 ( -0.191349  0.19137 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.34084e-08 ( -1.66232e-08  1.70185e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.516 sec. to    1.516 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.240567     ( -1.46421   2.10062 )
Epeak [keV] : 55.0054      ( -11.2457 45.9874 )
Norm@50keV  : 8.84589E-02    ( -0.0911009   1.10494 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.50     using 59 bins.
 Reduced chi-squared = 0.973214
# Null hypothesis probability of 5.32e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.07790 ( -0.196336  0.19674 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.2267e-08 ( -1.60471e-08  1.84733e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 8.98 sec.
Hardness ratio (energy fluence ratio) = 1.50023768652

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

S(15-50 keV)  = 1.8375988e-07
S(50-150 keV) = 3.277657e-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 = 1.165831900360716E-01, IMY = 2.970397902554033E-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:
-239.744000 -0.408000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 27.2890  14.4976    2.3  32.5   42.2   3.7322   5.0 ------	UNKNOWN                       
  8.0721 -10.2657    2.9  33.6  -16.9   2.3521   3.9 ------	UNKNOWN                       
 44.7948 -35.3862    2.4  21.0 -116.0   3.1649   4.9 ------	UNKNOWN                       
 17.2047 -49.9251    2.4  40.9  -85.5  11.1152   4.8 ------	UNKNOWN

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

Time interval of the image:
-0.408000 9.736000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 29.1063 -27.2979    0.7  17.7  -68.6   0.8305  17.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
63.156600 407.356600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 15.0798   2.2973    2.6  32.5   42.2   4.6076   4.5 ------	UNKNOWN                       
 22.5288 -25.6764    3.4   6.1   -7.0   2.6266   3.4 ------	UNKNOWN                       
353.0592 -20.2725    2.7  33.6  -16.9   3.7544   4.3 ------	UNKNOWN                       
353.5843 -32.4067    2.8  31.1  -39.2   3.8618   4.1 ------	UNKNOWN                       
 10.2274 -65.1226    3.7  39.7  -98.7   9.7876   3.1 ------	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