GRB180402A

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 May 30 15:50:02 EDT 2018
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger821103
======================================================================

  Trigger: 00821103      Segment: 000

  BAT Trigger Time: 544355120   [s; MET]
      Trigger Stop: 544355120.256   [s; MET]
               UTC: 2018-04-02T09:44:59.279000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 251.90471404867   Dec: -14.9635136172067  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.19
     Image Trigger?:     NO
     Rate S/N Ratio:     50.5074251966976  [ if not an image trigger ]
     Image S/N Ratio:    9.19

  Analysis Position:   [ source = BAT ]
    RA: 251.90471404867   Dec: -14.9635136172067  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 251.923245940902   Dec: -14.9282173716536  [deg; J2000]  
        { 16h 47m 41.6s , -14d 55' 41.6" }
         +/- 1.9521785474164 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.29543885010673 [arcmin] (formal 1-sigma fit error)
    SNR: 11.6974304440306
 
  Angular difference between the analysis and refined position is 2.374676 arcmin
 
  Partial Coding Fraction: 0.3789062    [ including projection effects ]

  Duration
     T90: 0.179999947547913 +/- 0.0312411001733173
        Measured from: 0.0679999589920044
                   to: 0.247999906539917     [s; relative to TRIGTIME]
     T50: 0.0999999046325684 +/- 0.0226273785602007
        Measured from: 0.120000004768372
                   to: 0.21999990940094     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.340000033378601     
                   to: 0.659999966621399     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0520000457763672     
                   to: 0.264000058174133     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.028493   0.040215   0.067162   0.034500
           0.006277   0.007629   0.008051   0.007692 [error]
 Peak      0.042393   0.063604   0.093849   0.025930
           0.012298   0.012956   0.011833   0.010835 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.212    0.052    0.264
T90     0.180    0.068    0.248
T50     0.100    0.120    0.220
Peak    1.000   -0.340    0.660
 
 
====== 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      -0.516    -0.289      0.317       -           -               -         4.96e-02     -8.50e-03          8.09e-03      55.800   57
CPL     -0.413    -0.401      0.731      967.554    -967.554      -967.554      5.46e-02     -1.23e-02          3.64e-02      56.130   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      -0.878     -0.300     0.324       -           -               -         1.58e-02     -2.75e-03          2.68e-03      69.870   57
CPL     -0.768     -0.407     1.182      681.428    -681.428      -681.428      1.76e-02     -4.22e-03          3.10e-02      69.910   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   5.39e-09  1.82e-08  5.10e-08  4.31e-07  1.40e-07  5.05e-07   erg/cm2
      90%_error_low -1.92e-09 -4.14e-09 -7.43e-09 -1.43e-07 -2.16e-08 -1.46e-07   erg/cm2
      90%_error_hi   2.25e-09  4.02e-09  7.37e-09  1.99e-07  2.17e-08  1.98e-07   erg/cm2
Peak flux       PL   3.60e-01  5.26e-01  5.73e-01  1.17e+00  1.82e+00  2.63e+00   ph/cm2/s
      90%_error_low -1.28e-01 -1.23e-01 -9.54e-02 -3.90e-01 -3.09e-01 -4.56e-01   ph/cm2/s
      90%_error_hi   1.49e-01  1.20e-01  9.45e-02  5.19e-01  3.11e-01  4.92e-01   ph/cm2/s
 
Fluence        CPL    N/A      N/A      N/A      N/A      N/A      N/A      erg/cm2
      90%_error_low -1.92e-09 -4.14e-09 -7.43e-09 -1.43e-07 -2.16e-08 -1.46e-07   erg/cm2
      90%_error_hi   2.25e-09  4.02e-09  7.37e-09  1.99e-07  2.17e-08  1.98e-07   erg/cm2
Peak flux      CPL   3.62e-01  5.26e-01  5.72e-01  1.19e+00  1.82e+00  2.66e+00   ph/cm2/s
      90%_error_low -1.77e-01 -1.23e-01 -9.46e-02     N/A   -3.21e-01 -8.93e-01   ph/cm2/s
      90%_error_hi   1.47e-01  1.20e-01  1.22e-01     N/A    3.08e-01  4.22e-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
  251.9232   -14.9282   0.0164    31.9225    58.4326         0.1788433     11.697 TRIG_00821103                 
 
Foreground time interval of the image:
  0.052   0.264 (delta_t =   0.212 [sec])
Background time interval of the image:
-239.000 -149.576 (delta_t =  89.424 [sec])
-149.000   0.052 (delta_t = 149.052 [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    0.052 sec. to    0.264 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.515526     ( -0.289243   0.316857 )
Norm@50keV  : 4.96249E-02    ( -0.00849594   0.00808563 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.80 using 59 PHA bins.
# Reduced chi-squared =         0.9789 for     57 degrees of freedom 
# Null hypothesis probability =   5.202372e-01
 
Photon flux (15-150 keV)    in 0.212 sec: 0.597222 ( -0.279627  0.658038 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40254e-07 ( -2.15663e-08  2.16605e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.052 sec. to    0.264 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.505138     ( -0.400524   0.731149 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 5.00373E-02    ( -0.00778375   0.0409585 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.83 using 59 PHA bins.
# Reduced chi-squared =         0.9969 for     56 degrees of freedom 
# Null hypothesis probability =   4.813895e-01
 
Photon flux (15-150 keV)    in 0.212 sec: 5.86152 ( -0.86043  0.86049 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -0.340 sec. to    0.660 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.878314     ( -0.299732   0.323531 )
Norm@50keV  : 1.58363E-02    ( -0.00274569   0.00267849 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.87 using 59 PHA bins.
# Reduced chi-squared =          1.226 for     57 degrees of freedom 
# Null hypothesis probability =   1.176912e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.81748 ( -0.30862  0.31115 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.79263e-07 ( -3.03509e-08  3.05247e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.340 sec. to    0.660 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.871354     ( -0.396917   1.19183 )
Epeak [keV] : 9998.85      ( -9998.85 -9998.85 )
Norm@50keV  : 1.59414E-02    ( -0.00257423   0.0326926 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.87 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     56 degrees of freedom 
# Null hypothesis probability =   1.006486e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.82001 ( -0.32117  0.30841 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.79461e-07 ( 0  0 ) 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.

 IMX = 3.261370498094933E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.000000 -149.575500 -149.000000 0.052000

# RAcent #  [deg] 244.9522 -15.6651 254.4379  35.2419 255.8876 -37.7690 256.6101 -36.4735 262.9563 -24.6065 264.7376 -44.4718 268.3518 270.3092 -24.9955 270.2632 -25.7402 273.9911 -14.0096 276.1084 -30.4898 284.8996 -24.9367 288.8063  10.9550 299.5903  35.1746 308.1035  40.8231 263.1897 -33.9692 277.1914 -45.6625 289.3128 -45.6920 275.0862   7.1811 272.0489  44.7307 295.8386 -31.1340 UNKNOWN UNKNOWN UNKNOWN

Pre-slew

 Time interval of the image: 0.052000 0.264000

# RAcent #  [deg] 244.9451 -15.5175 254.6503  35.2490 256.1085 -37.8262 256.4592 -36.5346 263.0433 -24.8863 264.5844 -44.4358 268.2814  -1.6229 270.0996 -24.9553 270.3218 -25.8893 273.8896 -13.9118 275.7632 -30.3126 285.2071 -25.0349 288.7841  11.0909 299.5898  35.2019 308.2766  41.0139 262.8897 -33.7553 251.9232 -14.9283 251.0619  51.3984 308.8560 -30.9901

Post-slew

 Time interval of the image: 63.500600 963.038100

# RAcent #  [deg] 244.9792 -15.6423 254.5608  35.3551 255.8052 -37.9936 256.2642 -36.3530 263.0819 -24.8908 264.8746 -44.5874 268.2179  -1.3020 270.2447 -25.1414 270.3235 -25.6741 273.8590 -14.1831 275.7693 -30.5323 285.1808 -24.7594 288.7790  10.9415 263.0638 -33.9787 207.6754 -35.8224 220.8690 -51.0914 229.9545 -37.2105 235.3151  -8.3776 263.7755 -19.6528 265.2154 -66.8190 269.0468   8.0981 UNKNOWN UNKNOWN

Mask shadow pattern

IMY = -5.308038167059512E-01 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] ['] 1.7 37.6 64.8 7.5475 6.9 2.2 Sco X-1 5.4 33.9 161.1 1.2942 2.2 6.1 Her X-1 12.5 48.4 32.7 1.5207 0.9 6.5 4U 1700-377 13.7 47.0 32.8 -1.1775 -0.8 9.0 GX 349+2 7.1 33.9 32.4 1.0247 1.6 8.8 GX 1+4 4.7 52.5 21.7 5.0509 2.4 1.3 4U 1735-44 -1.4538 120.3 11.0 50.7 -0.0387 -0.1 1.0 SW J1753.5-0127 20.0 32.5 20.5 0.2965 0.6 5.2 GX 5-1 7.0 33.3 20.4 0.9100 1.7 2.1 GRS 1758-258 5.0 21.2 15.4 1.0103 2.3 1.8 GX 17+2 0.0 37.7 11.0 -0.1117 -0.2 12.0 H1820-303 3.7 33.5 -3.8 -1.6141 -3.1 7.5 HT1900.1-2455 1.6 14.0 -94.3 3.7874 7.3 0.7 GRS 1915+105 1.6 35.9 -132.4 4.8912 7.2 1.6 Cyg X-1 9.1 44.6 -131.8 1.4968 1.3 7.8 Cyg X-3 0.0 42.7 27.0 0.5734 0.6 12.8 GX 354-0 2.4 52.9 10.5 7.9534 4.8 ------ UNKNOWN 2.4 54.4 0.2 7.3049 4.9 ------ UNKNOWN 0.1 0.1 94.2 36.1748 89.3 ------ UNKNOWN 3.0 37.6 -171.3 2.3034 3.9 ------ UNKNOWN 2.9 43.1 -13.9 2.6980 4.1 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 9.2 37.6 65.0 -0.0309 -1.3 7.6 Sco X-1 9.7 33.8 161.4 -0.0136 -1.2 11.0 Her X-1 3.3 48.4 32.5 -0.1286 -3.5 5.9 4U 1700-377 4.2 47.1 32.9 0.0861 2.7 6.8 GX 349+2 3.8 34.2 32.1 0.0391 3.0 8.6 GX 1+4 43.0 52.5 21.8 -0.0134 -0.3 6.8 4U 1735-44 6.0 11.2 50.4 0.0158 1.9 11.5 SW J1753.5-0127 0.0 32.5 20.9 -0.0323 -3.0 12.5 GX 5-1 7.0 33.4 20.2 -0.0180 -1.6 8.8 GRS 1758-258 4.4 21.1 15.7 0.0206 2.6 10.1 GX 17+2 6.0 37.5 11.5 0.0238 1.9 9.0 H1820-303 0.0 33.7 -4.2 -0.0075 -0.7 11.6 HT1900.1-2455 6.0 14.0 -94.8 -0.0152 -1.9 8.8 GRS 1915+105 82.1 35.9 -132.4 0.0015 0.1 0.0 Cyg X-1 9.2 44.8 -131.9 0.0252 1.3 8.4 Cyg X-3 7.5 42.6 27.5 -0.0289 -1.5 6.9 GX 354-0 1.0 31.9 58.4 0.1790 11.7 ------ UNKNOWN 2.4 48.5 172.5 0.1009 4.8 ------ UNKNOWN 2.3 50.0 -26.1 0.0826 5.0 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.3 6.7 80.7 43.8426 34.1 0.1 Sco X-1 11.3 50.4 -179.9 3.5423 1.0 5.1 Her X-1 0.0 23.3 -10.5 -0.6361 -0.5 12.4 4U 1700-377 15.0 21.7 -12.2 0.9934 0.8 9.3 GX 349+2 14.6 14.4 -47.5 -1.0363 -0.8 9.6 GX 1+4 57.3 31.6 -20.4 0.3319 0.2 10.0 4U 1735-44 0.0 21.1 -131.6 2.1296 1.5 12.8 SW J1753.5-0127 3.0 20.0 -59.2 5.2132 3.9 4.3 GX 5-1 11.9 20.3 -57.9 1.4657 1.1 4.3 GRS 1758-258 0.0 21.2 -92.0 1.6557 1.0 12.3 GX 17+2 0.0 26.8 -53.2 2.5437 1.5 12.8 H1820-303 0.0 32.7 -70.0 0.3771 0.2 12.5 HT1900.1-2455 2.6 44.8 -126.0 20.8417 4.4 1.2 GRS 1915+105 9.1 21.5 -28.6 -1.7245 -1.3 9.4 GX 354-0 3.8 44.6 51.0 19.2081 3.0 ------ UNKNOWN 3.6 43.9 25.2 8.7014 3.2 ------ UNKNOWN 3.1 29.6 34.4 5.9156 3.7 ------ UNKNOWN 2.5 17.5 107.6 6.4819 4.6 ------ UNKNOWN 3.3 12.2 -68.6 4.3296 3.5 ------ UNKNOWN 2.4 52.6 -9.2 16.0901 4.8 ------ UNKNOWN 2.7 28.6 -145.2 6.3737 4.3 ------ 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 = 3.261370498094933E-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