GRB181110A

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: Mon Dec 17 15:47:45 EST 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger871316
======================================================================

  Trigger: 00871316      Segment: 000

  BAT Trigger Time: 563532233.216   [s; MET]
      Trigger Stop: 563532234.24   [s; MET]
               UTC: 2018-11-10T08:43:31.319640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 302.342535673998   Dec: -36.902699253889  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.48
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8840987267251  [ if not an image trigger ]
     Image S/N Ratio:    7.48

  Analysis Position:   [ source = BAT ]
    RA: 302.342535673998   Dec: -36.902699253889  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 302.330123559643   Dec: -36.8781732848984  [deg; J2000]  
        { 20h 09m 19.2s , -36d 52' 41.4" }
         +/- 1.41270866791035 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.582905752057834 [arcmin] (formal 1-sigma fit error)
    SNR: 18.56767427053
 
  Angular difference between the analysis and refined position is 1.587529 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 138.424000024796 +/- 10.9277832336458
        Measured from: -39.2680000066757
                   to: 99.1560000181198     [s; relative to TRIGTIME]
     T50: 47.1999999284744 +/- 1.64099964656047
        Measured from: 7.29200005531311
                   to: 54.4919999837875     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 25.0320000648499     
                   to: 26.0320000648499     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -109.304000020027     
                   to: 129.808000087738     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     7.698149   7.402830   3.795698   0.692785
           0.121709   0.121605   0.104181   0.092860 [error]
 Peak      0.157004   0.176677   0.100426   0.026498
           0.009986   0.010588   0.008450   0.006579 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  239.112 -109.304  129.808
T90   138.424  -39.268   99.156
T50    47.200    7.292   54.492
Peak    1.000   25.032   26.032
 
 
====== 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      -2.023    -0.054      0.054       -           -               -         4.45e-03     -1.20e-04          1.19e-04      66.300   57
CPL     -1.908    -0.216      0.228       39.229     -34.736       -39.229      5.07e-03     -1.08e-03          1.48e-03      65.500   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      -1.852     -0.126     0.123       -           -               -         2.60e-02     -2.05e-03          2.02e-03      33.480   57
CPL     -1.473     -0.452     0.549       62.245     -17.048       -62.245      4.20e-02     -1.76e-02          4.16e-02      31.730   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   2.22e-06  2.98e-06  2.93e-06  5.18e-06  9.82e-06  1.33e-05   erg/cm2
      90%_error_low -1.07e-07 -7.90e-08 -1.11e-07 -4.27e-07 -2.53e-07 -5.00e-07   erg/cm2
      90%_error_hi   1.09e-07  7.89e-08  1.11e-07  4.54e-07  2.53e-07  5.17e-07   erg/cm2
Peak flux       PL   1.50e+00  1.23e+00  6.80e-01  5.54e-01  3.65e+00  3.96e+00   ph/cm2/s
      90%_error_low -1.57e-01 -8.40e-02 -7.01e-02 -1.05e-01 -2.52e-01 -2.70e-01   ph/cm2/s
      90%_error_hi   1.61e-01  8.40e-02  7.02e-02  1.19e-01  2.52e-01  2.70e-01   ph/cm2/s
 
Fluence        CPL   2.17e-06  3.00e-06  2.94e-06  4.34e-06  9.71e-06  1.24e-05   erg/cm2
      90%_error_low -1.42e-07 -8.77e-08 -1.13e-07 -1.20e-06 -3.33e-07 -1.28e-06   erg/cm2
      90%_error_hi   1.12e-07  8.82e-08  1.13e-07  1.09e-06  3.32e-07  1.78e-06   erg/cm2
Peak flux      CPL   1.43e+00  1.28e+00  6.87e-01  3.38e-01  3.60e+00  3.74e+00   ph/cm2/s
      90%_error_low -1.82e-01 -1.07e-01 -7.45e-02 -1.58e-01 -2.63e-01 -3.18e-01   ph/cm2/s
      90%_error_hi   1.83e-01  1.10e-01  7.49e-02  2.57e-01  2.62e-01  3.87e-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
  302.3301   -36.8782   0.0104    11.0722   165.6238         8.1671786     18.568 TRIG_00871316                 
 
Foreground time interval of the image:
-109.304  17.685 (delta_t = 126.989 [sec])
Background time interval of the image:
-130.315 -109.304 (delta_t =  21.011 [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 -109.304 sec. to  129.808 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.02269     ( -0.0544884   0.054072 )
Norm@50keV  : 4.44827E-03    ( -0.000119611   0.000118999 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.30 using 59 PHA bins.
# Reduced chi-squared =          1.163 for     57 degrees of freedom 
# Null hypothesis probability =   1.868445e-01
 
Photon flux (15-150 keV)    in 239.1 sec: 0.674351 ( -0.019752  0.019883 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.8229e-06 ( -2.52729e-07  2.52903e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from -109.304 sec. to  129.808 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.90776     ( -0.215776   0.2279 )
Epeak [keV] : 39.2291      ( -34.736 -39.2293 )
Norm@50keV  : 5.07392E-03    ( -0.00107932   0.00147684 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.50 using 59 PHA bins.
# Reduced chi-squared =          1.170 for     56 degrees of freedom 
# Null hypothesis probability =   1.803828e-01
 
Photon flux (15-150 keV)    in 239.1 sec: 0.666671 ( -0.024199  0.023043 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.70598e-06 ( -3.33174e-07  3.31847e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   25.032 sec. to   26.032 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.85221     ( -0.126398   0.123132 )
Norm@50keV  : 2.59709E-02    ( -0.00204714   0.00202081 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          33.48 using 59 PHA bins.
# Reduced chi-squared =         0.5873 for     57 degrees of freedom 
# Null hypothesis probability =   9.945364e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.65397 ( -0.25182  0.25199 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.38831e-07 ( -1.87716e-08  1.89613e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   25.032 sec. to   26.032 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.47332     ( -0.451737   0.548919 )
Epeak [keV] : 62.2446      ( -17.0483 -62.2447 )
Norm@50keV  : 4.20129E-02    ( -0.0175822   0.0416273 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.73 using 59 PHA bins.
# Reduced chi-squared =         0.5667 for     56 degrees of freedom 
# Null hypothesis probability =   9.963205e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.59661 ( -0.26263  0.26219 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 138.424 sec.
Hardness ratio (energy fluence ratio) = 0.984441855863

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

S(15-50 keV)  = 5.200139e-06
S(50-150 keV) = 4.622633e-06

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.

 IMX = -1.895602209165389E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -130.315400 -109.304000

# RAcent #  [deg] 256.1609 -37.9476 256.2557 -36.3765 262.8461 -24.8759 264.5990 -44.2962 268.4987  -1.5291 270.2273 -25.0574 270.1941 -25.6791 274.1469 -13.8733 275.7491 -30.3422 285.1399 -25.0507 288.7867  10.9790 263.0129 -33.8213 299.5338 -80.5626 270.3466   5.1105 263.6340  -3.4724

Pre-slew

 Time interval of the image: -109.304000 17.684600

# RAcent #  [deg] 256.1604 -37.9511 256.2548 -36.3833 263.1725 -24.7690 264.6771 -44.5789 268.4759  -1.5127 270.1195 -25.1138 270.2172 -25.6641 274.1059 -13.9499 275.8757 -30.3390 285.1287 -24.9361 288.6800  10.9292 262.9544 -33.8937 317.7715 -49.4572 302.3301 -36.8782

Post-slew

 Time interval of the image: 52.884600 962.844000

# RAcent #  [deg] 255.8688 -37.6679 256.2181 -36.4636 263.1492 -24.6435 264.9016 -44.4207 268.2265  -1.4856 270.2494 -25.0640 270.1596 -25.8221 274.0449 -14.0917 275.9499 -30.5097 285.1456 -25.0671 288.8288  10.9485 262.9484 -33.7243 334.2705  -8.6707 302.3189 -36.8935 151.0936 -85.0181 229.8507 -59.3939

Mask shadow pattern

IMY = -4.858698402020623E-02 source in the pre-burst/pre-slew/post-slew images image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 7.0 34.9 -105.0 0.2094 1.6 10.3 4U 1700-377 10.1 34.7 -102.3 -0.1471 -1.1 9.1 GX 349+2 42.9 29.8 -80.0 0.0278 0.3 11.8 GX 1+4 9.0 30.4 -119.4 -0.1150 -1.3 11.1 4U 1735-44 3.5 36.8 -37.3 0.3044 3.3 9.1 SW J1753.5-0127 5.4 23.2 -77.4 0.1658 2.2 3.4 GX 5-1 2.9 23.1 -79.0 0.3271 4.2 7.0 GRS 1758-258 0.0 24.3 -48.1 -0.0455 -0.7 12.8 GX 17+2 7.6 18.0 -91.7 -0.1138 -1.5 9.2 H1820-303 16.3 10.0 -66.9 -0.0450 -0.7 9.6 HT1900.1-2455 6.0 38.8 1.8 0.1877 1.9 2.1 GRS 1915+105 5.0 29.0 -98.2 0.2180 2.3 1.4 GX 354-0 2.2 53.4 -167.6 1.0315 5.1 ------ UNKNOWN 2.0 40.7 -28.2 0.5508 5.9 ------ UNKNOWN 1.9 38.9 -45.0 0.6495 6.0 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 6.5 34.9 -105.0 -1.5070 -1.8 10.4 4U 1700-377 13.5 34.7 -102.3 0.7233 0.9 9.0 GX 349+2 5.7 29.5 -79.7 1.3178 2.0 9.0 GX 1+4 9.3 30.4 -120.0 0.7083 1.2 8.2 4U 1735-44 3.4 36.8 -37.3 -2.1137 -3.4 7.4 SW J1753.5-0127 7.4 23.3 -77.6 -0.8018 -1.6 9.2 GX 5-1 3.8 23.1 -79.0 -1.6655 -3.2 6.6 GRS 1758-258 4.2 24.3 -48.3 1.2791 2.8 7.8 GX 17+2 4.6 17.9 -91.8 1.1974 2.5 3.1 H1820-303 13.0 10.0 -66.2 0.3843 0.9 5.1 HT1900.1-2455 7.1 38.8 1.6 1.0494 1.6 7.0 GRS 1915+105 7.0 29.1 -98.4 -1.0475 -1.6 3.9 GX 354-0 2.0 27.9 162.0 2.8838 5.7 ------ UNKNOWN 0.6 11.1 165.6 8.1669 18.6 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.0 36.6 -99.0 4.1619 2.4 12.0 4U 1700-377 10.9 36.6 -97.0 -1.8735 -1.1 10.8 GX 349+2 69.4 35.5 -74.5 -0.2420 -0.2 9.8 GX 1+4 16.2 29.1 -110.1 0.6936 0.7 7.0 4U 1735-44 34.8 47.4 -43.0 0.7135 0.3 8.7 SW J1753.5-0127 1.9 29.8 -69.1 5.9300 6.1 2.1 GX 5-1 7.8 29.5 -70.5 1.4227 1.5 9.1 GRS 1758-258 4.9 34.0 -48.7 2.2972 2.3 4.0 GX 17+2 11.9 22.8 -74.8 0.8117 1.0 8.7 H1820-303 8.4 18.8 -49.3 -1.0879 -1.4 10.6 HT1900.1-2455 3.7 49.5 -10.9 4.5525 3.1 1.8 GRS 1915+105 4.4 32.1 -89.6 3.0614 2.6 6.9 GX 354-0 4.5 40.4 60.5 7.9028 2.6 ------ UNKNOWN 1.7 0.0 -95.5 4.8455 6.7 ------ UNKNOWN 2.7 57.5 -170.5 17.9819 4.4 ------ UNKNOWN 3.6 50.3 -134.2 11.2915 3.2 ------ 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

IMX = -1.895602209165389E-01,

Spacecraft aspect plot

Bright

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