GRB231110A

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: Tue Dec 26 22:45:24 EST 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1195733
======================================================================

  Trigger: 01195733      Segment: 000

  BAT Trigger Time: 721344007.168   [s; MET]
      Trigger Stop: 721344009.216   [s; MET]
               UTC: 2023-11-10T21:19:34.821020    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 356.296023258114   Dec: 82.6211432242904  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.31
     Image Trigger?:     NO
     Rate S/N Ratio:     38.0525951808809  [ if not an image trigger ]
     Image S/N Ratio:    12.31

  Analysis Position:   [ source = BAT ]
    RA: 356.296023258114   Dec: 82.6211432242904  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 356.254642187074   Dec: 82.6280995645958  [deg; J2000]  
        { 23h 45m 01.1s , +82d 37' 41.2" }
         +/- 1.2495549652113 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.468828779499248 [arcmin] (formal 1-sigma fit error)
    SNR: 22.1256699967343
 
  Angular difference between the analysis and refined position is 0.525158 arcmin
 
  Partial Coding Fraction: 0.34375    [ including projection effects ]

  Duration
     T90: 12.0119999647141 +/- 3.46746825399134
        Measured from: -0.611999988555908
                   to: 11.3999999761581     [s; relative to TRIGTIME]
     T50: 4.94799995422363 +/- 1.04785493541221
        Measured from: 1.06000006198883
                   to: 6.00800001621246     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.636000037193298     
                   to: 1.6360000371933     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.40399992465973     
                   to: 15.0759999752045     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.592913   0.761665   0.679117   0.226784
           0.048746   0.052218   0.046379   0.038231 [error]
 Peak      0.076340   0.119071   0.160686   0.086373
           0.013292   0.015415   0.016324   0.013257 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   16.480   -1.404   15.076
T90    12.012   -0.612   11.400
T50     4.948    1.060    6.008
Peak    1.000    0.636    1.636
 
 
====== 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      -1.405    -0.120      0.120       -           -               -         9.45e-03     -6.53e-04          6.52e-04      60.790   57
CPL     -1.342    -0.174      0.386      547.200    -547.200      -547.200      1.01e-02     -1.32e-03          5.25e-03      60.830   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      -0.883     -0.201     0.209       -           -               -         2.79e-02     -3.40e-03          3.37e-03      53.440   57
CPL     -0.732     -0.521     0.868      501.777    -501.777      -501.777      3.24e-02     -7.14e-03          4.15e-02      53.330   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   1.82e-07  3.54e-07  5.35e-07  1.75e-06  1.50e-06  2.83e-06   erg/cm2
      90%_error_low -2.25e-08 -2.70e-08 -4.58e-08 -3.07e-07 -1.13e-07 -3.42e-07   erg/cm2
      90%_error_hi   2.33e-08  2.68e-08  4.55e-08  3.49e-07  1.13e-07  3.75e-07   erg/cm2
Peak flux       PL   6.36e-01  9.27e-01  1.01e+00  2.04e+00  3.20e+00  4.61e+00   ph/cm2/s
      90%_error_low -1.55e-01 -1.46e-01 -1.24e-01 -4.96e-01 -3.88e-01 -5.95e-01   ph/cm2/s
      90%_error_hi   1.69e-01  1.43e-01  1.23e-01  5.92e-01  3.88e-01  6.21e-01   ph/cm2/s
 
Fluence        CPL   1.81e-07  3.55e-07  5.46e-07  1.75e-06  1.50e-06  2.78e-06   erg/cm2
      90%_error_low -2.62e-08 -2.74e-08 -5.80e-08 -8.27e-07 -1.19e-07 -8.16e-07   erg/cm2
      90%_error_hi   1.40e-08  3.13e-08  4.13e-08  1.97e-07  1.15e-07  4.11e-07   erg/cm2
Peak flux      CPL   6.11e-01  9.35e-01  1.03e+00  1.75e+00  3.18e+00  4.32e+00   ph/cm2/s
      90%_error_low -1.96e-01 -1.50e-01 -1.40e-01 -9.02e-01 -3.93e-01 -9.97e-01   ph/cm2/s
      90%_error_hi   1.66e-01  1.53e-01  1.64e-01  3.36e-01  3.91e-01  8.47e-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
  356.2546    82.6281   0.0087    38.7939   149.6650         2.3323629     22.126 TRIG_01195733                 
 
Foreground time interval of the image:
 -1.404  15.076 (delta_t =  16.480 [sec])
Background time interval of the image:
-133.067  -1.404 (delta_t = 131.663 [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   -1.404 sec. to   15.076 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.40462     ( -0.119653   0.120272 )
Norm@50keV  : 9.45068E-03    ( -0.000652983   0.000652254 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.79     using 59 bins.
 Reduced chi-squared = 1.06649
# Null hypothesis probability of 3.41e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 16.48 sec: 1.15215 ( -0.08278  0.08296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.50369e-06 ( -1.1275e-07  1.13341e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.404 sec. to   15.076 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.40148     ( -0.169476   0.390268 )
Epeak [keV] : 9997.54      ( -9997.42 -9997.42 )
Norm@50keV  : 9.48489E-03    ( -0.000655329   0.00591799 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   60.79     using 59 bins.
 Reduced chi-squared = 1.08554
# Null hypothesis probability of 3.08e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 16.48 sec: 1.15150 ( -0.0849  0.08376 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.50223e-06 ( -1.19312e-07  1.14645e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.636 sec. to    1.636 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.882562     ( -0.200901   0.209456 )
Norm@50keV  : 2.78518E-02    ( -0.00339965   0.00336629 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.44     using 59 bins.
 Reduced chi-squared = 0.937544
# Null hypothesis probability of 6.09e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.19647 ( -0.38754  0.38839 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.14746e-07 ( -3.94309e-08  3.95531e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.636 sec. to    1.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.731923     ( -0.521211   0.86841 )
Epeak [keV] : 501.777      ( -501.784 -501.784 )
Norm@50keV  : 3.23943E-02    ( -0.00713674   0.0415057 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   53.33     using 59 bins.
 Reduced chi-squared = 0.952321
# Null hypothesis probability of 5.77e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.18370 ( -0.3927  0.39093 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.13437e-07 ( -4.05015e-08  3.9218e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 12.012 sec.
Hardness ratio (energy fluence ratio) = 1.51091440399

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

S(15-50 keV)  = 5.361654e-07
S(50-150 keV) = 9.675322e-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 = -6.937893841732251E-01, IMY = -4.059862301839708E-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:
-133.067410 -1.404000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
168.3586  47.9006    3.0  10.9  -16.0   0.7631   3.8 ------	UNKNOWN

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

Time interval of the image:
-1.404000 15.076000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
356.2546  82.6281    0.5  38.8  149.7   2.3323  22.1 ------	UNKNOWN                       
270.2835  79.2854    2.4  34.5  169.5   0.3322   4.7 ------	UNKNOWN                       
172.3993  45.5927    2.0  13.0  -30.4   0.2989   5.9 ------	UNKNOWN                       
220.7717  55.7642    2.3  25.9 -134.6   0.2994   5.0 ------	UNKNOWN                       
262.4749  42.2995    1.8  55.1 -145.1   1.7305   6.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

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