GRB121102A

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: Sun Jan 12 23:35:44 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger537266
======================================================================

  Trigger: 00537266      Segment: 000

  BAT Trigger Time: 373516032.512   [s; MET]
      Trigger Stop: 373516033.536   [s; MET]
               UTC: 2012-11-02T02:27:02.685320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 270.902873735498   Dec: -16.9658028054735  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.37
     Image Trigger?:     NO
     Rate S/N Ratio:     14.8996644257513  [ if not an image trigger ]
     Image S/N Ratio:    7.37

  Analysis Position:   [ source = BAT ]
    RA: 270.902873735498   Dec: -16.9658028054735  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 270.894556895852   Dec: -16.9507653700447  [deg; J2000]  
        { 18h 03m 34.7s , -16d 57' 02.8" }
         +/- 0.691127037731532 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.216766577275625 [arcmin] (formal 1-sigma fit error)
    SNR: 51.5610085443632
 
  Angular difference between the analysis and refined position is 1.020723 arcmin
 
  Partial Coding Fraction: 1.03125    [ including projection effects ]

  Duration
     T90: 54.6799999475479 +/- 13.9357388511512
        Measured from: 1.62000000476837
                   to: 56.2999999523163     [s; relative to TRIGTIME]
     T50: 11.6799999475479 +/- 1.93469791194361
        Measured from: 5.34799998998642
                   to: 17.0279999375343     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 5.67599999904633     
                   to: 6.67599999904633     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.296000003814697     
                   to: 74.9159999489784     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.386494   1.487785   0.853959   0.107818
           0.058544   0.054182   0.045082   0.038410 [error]
 Peak      0.079805   0.121633   0.078472   0.013430
           0.007527   0.007560   0.006222   0.004586 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   75.212   -0.296   74.916
T90    54.680    1.620   56.300
T50    11.680    5.348   17.028
Peak    1.000    5.676    6.676
 
 
====== 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      -1.857    -0.090      0.089       -           -               -         2.96e-03     -1.47e-04          1.46e-04      39.500   57
CPL     -1.732    -0.325      0.347       99.638     -43.842       -99.638      3.45e-03     -9.51e-04          1.75e-03      39.070   56
 
 
=== 1-s peak 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      -1.593     -0.123     0.122       -           -               -         1.82e-02     -1.39e-03          1.38e-03      67.180   57
CPL     -0.807     -0.505     0.569       72.291     -13.944        45.106      4.72e-02     -2.12e-02          4.57e-02      59.670   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   3.99e-07  5.89e-07  6.51e-07  1.35e-06  2.05e-06  2.99e-06   erg/cm2
      90%_error_low -3.05e-08 -2.70e-08 -4.46e-08 -1.89e-07 -1.02e-07 -2.27e-07   erg/cm2
      90%_error_hi   3.13e-08  2.69e-08  4.48e-08  2.10e-07  1.02e-07  2.43e-07   erg/cm2
Peak flux       PL   8.20e-01  7.81e-01  5.18e-01  5.34e-01  2.34e+00  2.65e+00   ph/cm2/s
      90%_error_low -9.60e-02 -5.94e-02 -4.95e-02 -9.51e-02 -1.73e-01 -1.95e-01   ph/cm2/s
      90%_error_hi   9.90e-02  5.92e-02  4.94e-02  1.07e-01  1.73e-01  1.95e-01   ph/cm2/s
 
Fluence        CPL   3.91e-07  5.96e-07  6.51e-07  1.09e-06  2.02e-06  2.73e-06   erg/cm2
      90%_error_low -3.62e-08 -3.15e-08 -4.55e-08 -4.50e-07 -1.22e-07 -4.72e-07   erg/cm2
      90%_error_hi   3.37e-08  3.25e-08  4.58e-08  3.13e-07  1.20e-07  4.95e-07   erg/cm2
Peak flux      CPL   7.27e-01  8.46e-01  5.42e-01  2.29e-01  2.27e+00  2.34e+00   ph/cm2/s
      90%_error_low -1.12e-01 -7.34e-02 -5.59e-02 -9.40e-02 -1.78e-01 -2.05e-01   ph/cm2/s
      90%_error_hi   1.14e-01  7.53e-02  5.64e-02  1.58e-01  1.78e-01  2.26e-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
  270.8946   -16.9508   0.0037     5.9926  -132.1383         2.4889201     51.561 TRIG_00537266                 
 
Foreground time interval of the image:
 -0.296  12.389 (delta_t =  12.685 [sec])
Background time interval of the image:
-239.512  -0.296 (delta_t = 239.216 [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   -0.296 sec. to   74.916 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.85725     ( -0.0897459   0.088714 )
Norm@50keV  : 2.96413E-03    ( -0.000146897   0.000145865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.50 using 59 PHA bins.
# Reduced chi-squared =         0.6929 for     57 degrees of freedom 
# Null hypothesis probability =   9.625732e-01
 
Photon flux (15-150 keV)    in 75.21 sec: 0.417897 ( -0.019778  0.019831 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04996e-06 ( -1.01662e-07  1.02303e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.296 sec. to   74.916 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.73155     ( -0.324519   0.347014 )
Epeak [keV] : 99.6375      ( -43.8425 -99.6376 )
Norm@50keV  : 3.45182E-03    ( -0.000950651   0.00175488 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.07 using 59 PHA bins.
# Reduced chi-squared =         0.6976 for     56 degrees of freedom 
# Null hypothesis probability =   9.584483e-01
 
Photon flux (15-150 keV)    in 75.21 sec: 0.414328 ( -0.021731  0.02173 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.02309e-06 ( -1.22337e-07  1.20322e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    5.676 sec. to    6.676 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.59253     ( -0.122947   0.121649 )
Norm@50keV  : 1.82213E-02    ( -0.00138898   0.00138178 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.18 using 59 PHA bins.
# Reduced chi-squared =          1.179 for     57 degrees of freedom 
# Null hypothesis probability =   1.676477e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.33621 ( -0.17273  0.17289 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.70589e-07 ( -1.38959e-08  1.40103e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    5.676 sec. to    6.676 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.806594     ( -0.504609   0.569115 )
Epeak [keV] : 72.2910      ( -13.9444 45.1056 )
Norm@50keV  : 4.72223E-02    ( -0.021187   0.0456934 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.67 using 59 PHA bins.
# Reduced chi-squared =          1.065 for     56 degrees of freedom 
# Null hypothesis probability =   3.439063e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.26770 ( -0.17802  0.17811 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.60465e-07 ( -1.51501e-08  1.53476e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 54.68 sec.
Hardness ratio (energy fluence ratio) = 1.10402765193

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

S(15-50 keV)  = 9.878327e-07
S(50-150 keV) = 1.0621471e-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 = -7.042880928023336E-02,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.512000 -0.296000

# RAcent #  [deg] 244.9781 -15.6410 254.4110  35.3427 255.9857 -37.8606 256.4587 -36.4153 262.8457 -24.6838 264.7134 -44.5469 268.4503  -1.5078 270.3074 -25.0696 270.2278 -25.8917 274.0369 -14.0210 275.9925 -30.2647 285.1875 -24.8326 288.8122  10.9259 262.9491 -33.8455 266.2890 -26.3989 237.9520 -65.9138 232.5974 -41.9571 235.7440  13.6504

Pre-slew

 Time interval of the image: -0.296000 12.388600

# RAcent #  [deg] 244.9344 -15.7680 254.4686  35.3407 255.8137 -37.8534 256.4970 -36.2846 262.9890 -24.8920 264.9005 -44.4671 268.3336  -1.3054 270.3926 -25.1380 270.1399 -25.5980 274.1516 -13.9003 276.0427 -30.2644 285.1044 -24.8998 288.7631  11.0899 263.0129 -33.7053 270.8946 -16.9508

Post-slew

 Time interval of the image: 36.388600 962.620400

# RAcent #  [deg] 244.9767 -15.6347 254.3549  35.1721 255.9949 -37.8425 256.3677 -36.3814 263.1630 -24.5952 264.8783 -44.3322 268.3466  -1.4472 270.2760 -25.0985 270.3110 -25.6806 273.9217 -14.0738 276.0933 -30.3546 284.8832 -24.9870 288.8390  11.0251 262.8669 -33.8590 296.1592  19.7768 309.5573 -55.8646 270.5073 -20.4600 266.2761 -26.4204 256.7148 -66.6073 229.9709 -70.2129

IMY = 7.784037113046700E-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] ['] 0.4 29.5 -95.5 9.0184 26.7 0.1 Sco X-1 2.2 51.9 -17.7 3.0450 5.3 2.3 Her X-1 1.3 30.5 -145.2 2.4247 8.6 1.0 4U 1700-377 3.2 29.1 -143.9 0.9758 3.6 1.2 GX 349+2 4.8 16.8 -133.5 0.5426 2.4 9.6 GX 1+4 9.5 33.1 -162.3 0.2997 1.2 5.9 4U 1735-44 4.1 13.0 -27.6 0.6138 2.8 5.9 SW J1753.5-0127 2.5 13.2 -156.2 1.0118 4.6 1.4 GX 5-1 3.4 14.0 -157.1 0.7353 3.4 9.8 GRS 1758-258 1.7 1.8 -135.4 1.6236 6.9 2.0 GX 17+2 6.3 17.6 -178.2 0.4145 1.8 7.1 H1820-303 18.3 15.4 147.7 -0.1468 -0.6 9.8 HT1900.1-2455 2.3 27.2 34.3 1.5084 5.0 1.4 GRS 1915+105 3.8 23.9 -150.2 0.7432 3.0 2.1 GX 354-0 1.1 16.1 -145.9 2.3002 10.6 ------ UNKNOWN 3.6 58.9 -159.2 4.8080 3.3 ------ UNKNOWN 3.0 47.1 -132.6 3.1492 3.9 ------ UNKNOWN 2.2 47.2 -53.5 5.1278 5.1 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 7.9 29.5 -95.7 -0.1108 -1.5 8.1 Sco X-1 4.0 51.9 -17.6 -0.3600 -2.9 0.5 Her X-1 22.5 30.6 -144.9 0.0312 0.5 8.2 4U 1700-377 18.3 29.0 -143.8 0.0375 0.6 8.8 GX 349+2 5.9 16.8 -134.4 0.0978 1.9 8.9 GX 1+4 105.9 33.0 -162.4 0.0066 0.1 6.8 4U 1735-44 6.3 13.3 -27.6 -0.0869 -1.8 9.1 SW J1753.5-0127 5.0 13.3 -156.6 0.1107 2.4 6.9 GX 5-1 5.4 13.8 -156.4 -0.1034 -2.2 12.4 GRS 1758-258 6.9 1.6 -135.6 -0.0779 -1.7 11.8 GX 17+2 4.8 17.6 -178.3 -0.1201 -2.4 8.7 H1820-303 11.4 15.4 148.1 0.0508 1.0 3.9 HT1900.1-2455 4.6 27.3 34.0 0.1654 2.5 8.9 GRS 1915+105 5.1 23.8 -150.2 0.1193 2.3 7.9 GX 354-0 0.2 6.0 -132.1 2.4889 51.6 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.3 24.9 -84.9 30.8382 35.9 0.4 Sco X-1 11.7 54.4 -10.8 -1.9716 -1.0 11.4 Her X-1 0.6 24.7 -145.0 13.5458 20.0 0.4 4U 1700-377 4.9 23.3 -143.5 1.6031 2.4 4.1 GX 349+2 4.6 10.5 -132.1 1.8439 2.5 12.3 GX 1+4 4.7 27.8 -164.9 1.6251 2.5 9.1 4U 1735-44 2.3 15.7 -3.7 3.1528 5.0 1.3 SW J1753.5-0127 1.2 8.2 -170.2 6.2128 9.7 1.2 GX 5-1 4.0 8.7 -170.7 2.0625 3.1 3.8 GRS 1758-258 2.3 4.1 51.5 3.6197 5.1 5.4 GX 17+2 4.6 14.2 167.3 1.6367 2.5 8.7 H1820-303 8.0 15.3 129.8 1.0088 1.4 9.2 HT1900.1-2455 4.4 33.1 39.4 2.4609 2.6 5.3 GRS 1915+105 6.7 18.4 -152.6 1.2150 1.7 6.3 GX 354-0 3.8 44.3 40.9 6.8433 3.0 ------ UNKNOWN 3.3 48.7 158.0 7.2562 3.5 ------ UNKNOWN 2.3 3.5 -168.1 3.0569 5.0 ------ UNKNOWN 0.8 10.4 -150.6 9.7734 14.9 ------ UNKNOWN 3.7 50.5 -167.0 5.1730 3.1 ------ UNKNOWN 4.2 58.7 -159.2 12.9879 2.8 ------ 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