GRB111022A

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 Jan 13 19:26:22 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger506070
======================================================================

  Trigger: 00506070      Segment: 000

  BAT Trigger Time: 340992432.448   [s; MET]
      Trigger Stop: 340992433.472   [s; MET]
               UTC: 2011-10-22T16:07:04.954100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 275.871554015748   Dec: -23.667890214955  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.41
     Image Trigger?:     NO
     Rate S/N Ratio:     18.6279360101972  [ if not an image trigger ]
     Image S/N Ratio:    12.41

  Analysis Position:   [ source = BAT ]
    RA: 275.871554015748   Dec: -23.667890214955  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 275.87151383965   Dec: -23.667052180839  [deg; J2000]  
        { 18h 23m 29.2s , -23d 40' 01.4" }
         +/- 0.923147456026262 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.351109484324111 [arcmin] (formal 1-sigma fit error)
    SNR: 34.0981743313111
 
  Angular difference between the analysis and refined position is 0.050330 arcmin
 
  Partial Coding Fraction: 0.6640625    [ including projection effects ]

  Duration
     T90: 22.8199999928474 +/- 4.28261648505658
        Measured from: -14.2200000286102
                   to: 8.59999996423721     [s; relative to TRIGTIME]
     T50: 8.17599999904633 +/- 0.984893847997244
        Measured from: -4.66800004243851
                   to: 3.50799995660782     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -1.46399998664856     
                   to: -0.46399998664856     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -17.6920000314713     
                   to: 17.5920000076294     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.002979   1.414873   0.824569   0.199698
           0.048580   0.047392   0.041762   0.039635 [error]
 Peak      0.076016   0.119071   0.071882   0.008056
           0.008818   0.008976   0.007803   0.006799 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   35.284  -17.692   17.592
T90    22.820  -14.220    8.600
T50     8.176   -4.668    3.508
Peak    1.000   -1.464   -0.464
 
 
====== 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: CPL)
 
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      -1.725    -0.081      0.080       -           -               -         6.33e-03     -2.92e-04          2.91e-04      71.870   57
CPL     -0.933    -0.366      0.401       63.704      -8.098        16.385      1.63e-02     -5.69e-03          9.92e-03      56.810   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      -1.706     -0.163     0.158       -           -               -         1.82e-02     -1.85e-03          1.83e-03      65.020   57
CPL     -0.905     -0.667     0.796       62.141     -13.494        76.842      4.96e-02     -2.76e-02          8.39e-02      60.680   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   3.53e-07  5.65e-07  6.83e-07  1.62e-06  2.07e-06  3.22e-06   erg/cm2
      90%_error_low -2.57e-08 -2.52e-08 -4.24e-08 -2.05e-07 -9.92e-08 -2.41e-07   erg/cm2
      90%_error_hi   2.63e-08  2.51e-08  4.25e-08  2.24e-07  9.98e-08  2.56e-07   erg/cm2
Peak flux       PL   9.14e-01  8.14e-01  4.99e-01  4.64e-01  2.42e+00  2.69e+00   ph/cm2/s
      90%_error_low -1.29e-01 -7.58e-02 -6.52e-02 -1.09e-01 -2.24e-01 -2.49e-01   ph/cm2/s
      90%_error_hi   1.34e-01  7.57e-02  6.52e-02  1.29e-01  2.24e-01  2.50e-01   ph/cm2/s
 
Fluence        CPL   3.10e-07  6.06e-07  6.91e-07  5.46e-07  1.92e-06  2.15e-06   erg/cm2
      90%_error_low -3.12e-08 -3.15e-08 -4.72e-08 -1.93e-07 -1.17e-07 -2.26e-07   erg/cm2
      90%_error_hi   3.18e-08  3.20e-08  4.70e-08  3.13e-07  1.18e-07  3.30e-07   erg/cm2
Peak flux      CPL   8.20e-01  8.85e-01  5.12e-01  1.85e-01  2.34e+00  2.40e+00   ph/cm2/s
      90%_error_low -1.51e-01 -9.65e-02 -7.37e-02 -1.01e-01 -2.33e-01 -2.60e-01   ph/cm2/s
      90%_error_hi   1.54e-01  1.00e-01  7.34e-02  2.08e-01  2.33e-01  2.95e-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
  275.8715   -23.6671   0.0056    26.7661   145.9096         3.5045242     34.098 TRIG_00506070                 
 
Foreground time interval of the image:
-17.692  12.853 (delta_t =  30.545 [sec])
Background time interval of the image:
-90.947 -17.692 (delta_t =  73.255 [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  -17.692 sec. to   17.592 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.72544     ( -0.0808684   0.0800795 )
Norm@50keV  : 6.33391E-03    ( -0.000292197   0.000290962 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.87 using 59 PHA bins.
# Reduced chi-squared =          1.261 for     57 degrees of freedom 
# Null hypothesis probability =   8.877223e-02
 
Photon flux (15-150 keV)    in 35.28 sec: 0.848867 ( -0.038183  0.038257 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.06542e-06 ( -9.92176e-08  9.98308e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -17.692 sec. to   17.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.932674     ( -0.366053   0.401159 )
Epeak [keV] : 63.7036      ( -8.09741 16.3854 )
Norm@50keV  : 1.63145E-02    ( -0.00568673   0.00991532 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.81 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     56 degrees of freedom 
# Null hypothesis probability =   4.447187e-01
 
Photon flux (15-150 keV)    in 35.28 sec: 0.808310 ( -0.041878  0.04201 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.91725e-06 ( -1.16893e-07  1.18239e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -1.464 sec. to   -0.464 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.70637     ( -0.162656   0.158409 )
Norm@50keV  : 1.82041E-02    ( -0.00184915   0.00182709 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.02 using 59 PHA bins.
# Reduced chi-squared =          1.141 for     57 degrees of freedom 
# Null hypothesis probability =   2.175120e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.42321 ( -0.22389  0.22405 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.68488e-07 ( -1.78377e-08  1.80726e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.464 sec. to   -0.464 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.904608     ( -0.666636   0.795597 )
Epeak [keV] : 62.1412      ( -13.4945 76.8419 )
Norm@50keV  : 4.95834E-02    ( -0.0276122   0.0838641 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.68 using 59 PHA bins.
# Reduced chi-squared =          1.084 for     56 degrees of freedom 
# Null hypothesis probability =   3.110134e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.34489 ( -0.23281  0.23291 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.56751e-07 ( -1.97575e-08  2.03414e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 22.82 sec.
Hardness ratio (energy fluence ratio) = 1.14077460779

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

S(15-50 keV)  = 9.159384e-07
S(50-150 keV) = 1.0012988e-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.

Mask shadow pattern

 IMX = -4.177162113801573E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -90.947410 -17.692000

# RAcent #  [deg] 244.9799 -15.6363 254.2928  35.4181 256.1081 -37.6793 256.2660 -36.3971 263.1290 -24.5691 264.9482 -44.5689 268.4496  -1.5226 270.1277 -25.0788 270.4532 -25.7328 273.8852 -14.2038 276.0905 -30.4031 284.9022 -25.0045 288.8648  10.9537 262.9233 -33.8455 276.0843  31.8441 232.6684  38.9634 213.1725  19.6776

Pre-slew

 Time interval of the image: -17.692000 12.852580

# RAcent #  [deg] 245.0054 -15.4897 254.6371  35.2126 256.1365 -37.9782 256.4991 -36.3826 263.1914 -24.8634 264.6835 -44.5028 268.5229  -1.4651 270.4196 -24.9855 270.2947 -25.7354 273.8875 -14.2151 275.9301 -30.3766 1399.6 285.0577 -24.8391 288.9256  11.0783 263.1705 -33.9525 275.8715 -23.6671 265.0294 -55.7953 214.0132   7.5224

Post-slew

 Time interval of the image: 62.452580 962.582000

# RAcent #  [deg] 244.9815 -15.6409 255.8236 -37.6748 256.3770 -36.4866 262.8520 -24.5934 264.8711 -44.3649 268.3597  -1.4376 270.4089 -25.0826 270.3364 -25.7461 274.0711 -14.0471 275.9640 -30.3358 285.0340 -24.9199 288.8039  11.0215 262.9250 -33.8098 327.4935 -52.5729 271.8947   8.6343 265.8207 -80.5282 255.2399 -41.6542

IMY = -2.827130661494183E-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] ['] 0.5 15.2 -125.8 2.6745 22.2 0.2 Sco X-1 7.1 40.4 7.5 -0.3167 -1.6 9.3 Her X-1 0.0 32.7 -170.5 0.0521 0.3 11.4 4U 1700-377 8.0 31.4 -170.8 0.2146 1.4 8.3 GX 349+2 0.0 20.8 171.1 -0.1462 -1.1 12.4 GX 1+4 0.0 40.4 179.8 0.1322 0.6 11.3 4U 1735-44 6.2 12.9 84.6 0.2461 1.8 6.5 SW J1753.5-0127 10.1 24.3 157.1 -0.1597 -1.1 8.5 GX 5-1 10.8 25.0 157.4 0.1552 1.1 8.2 GRS 1758-258 5.9 19.9 128.6 -0.2729 -2.0 12.3 GX 17+2 22.5 31.7 155.3 0.0918 0.5 8.8 H1820-303 12.8 34.2 138.5 -0.2063 -0.9 8.9 HT1900.1-2455 9.1 36.4 73.6 -0.4469 -1.3 3.9 GRS 1915+105 5.0 29.6 177.9 0.3325 2.3 3.3 GX 354-0 3.4 41.5 35.8 0.8993 3.4 ------ UNKNOWN 2.1 48.9 -14.4 1.3782 5.4 ------ UNKNOWN 3.3 48.8 -48.6 2.3275 3.5 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 14.5 15.1 -125.4 -0.0676 -0.8 9.2 Sco X-1 0.0 40.2 7.9 -0.0449 -0.3 11.7 Her X-1 5.6 33.0 -170.5 0.2000 2.1 10.7 4U 1700-377 9.9 31.4 -171.1 0.1114 1.2 3.9 GX 349+2 0.0 21.1 171.2 0.1735 2.0 12.2 GX 1+4 25.2 40.3 -179.9 -0.0577 -0.5 4.1 4U 1735-44 5.8 13.0 84.4 -0.1750 -2.0 9.3 SW J1753.5-0127 15.7 24.3 156.4 0.0658 0.7 9.3 GX 5-1 4.6 24.9 157.7 0.2256 2.5 0.6 GRS 1758-258 0.0 19.9 128.6 0.1415 1.5 12.7 GX 17+2 31.6 155.5 -0.0010 -0.0 0.6 H1820-303 21.1 34.2 138.1 0.0772 0.5 5.0 HT1900.1-2455 0.0 36.5 73.4 -0.1503 -0.7 10.9 GRS 1915+105 273.4 29.7 177.6 -0.0039 -0.0 11.5 GX 354-0 0.3 26.8 145.9 3.5056 34.1 ------ UNKNOWN 2.4 51.3 -176.8 1.0029 4.8 ------ UNKNOWN 2.6 43.7 -64.0 1.5668 4.4 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.4 30.1 -77.9 30.7569 32.0 0.1 Sco X-1 0.0 22.1 -131.6 0.3615 0.6 12.8 4U 1700-377 2.7 21.1 -129.5 2.6723 4.2 4.7 GX 349+2 17.7 11.9 -94.8 0.4280 0.7 12.5 GX 1+4 2.8 22.6 -156.8 2.5701 4.1 7.5 4U 1735-44 2.8 23.4 -16.8 2.4635 4.2 1.0 SW J1753.5-0127 4.2 5.2 -104.8 1.6880 2.8 6.8 GX 5-1 3.5 5.4 -111.4 2.0629 3.4 1.8 GRS 1758-258 3.5 9.8 -7.9 2.1445 3.3 3.9 GX 17+2 2.5 6.7 -178.3 2.6939 4.6 2.8 H1820-303 39.4 8.4 102.9 -0.1846 -0.3 0.1 HT1900.1-2455 4.5 36.9 23.9 2.5668 2.5 4.6 GRS 1915+105 2.2 15.2 -132.4 2.9800 5.3 3.5 GX 354-0 3.7 48.4 142.8 9.7641 3.1 ------ UNKNOWN 4.4 32.5 -4.9 2.0476 2.6 ------ UNKNOWN 3.8 57.0 -175.6 10.2972 3.0 ------ UNKNOWN 1.2 24.9 -138.9 6.1754 9.6 ------ 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

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