GRB120803A

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 02:35:29 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger529582
======================================================================

  Trigger: 00529582      Segment: 000

  BAT Trigger Time: 365671345.6   [s; MET]
      Trigger Stop: 365671353.792   [s; MET]
               UTC: 2012-08-03T07:22:16.104060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 269.565357237366   Dec: -6.71511030893272  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.28
     Image Trigger?:     NO
     Rate S/N Ratio:     11.7898261225516  [ if not an image trigger ]
     Image S/N Ratio:    7.28

  Analysis Position:   [ source = BAT ]
    RA: 269.565357237366   Dec: -6.71511030893272  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 269.522898174398   Dec: -6.72695508258997  [deg; J2000]  
        { 17h 58m 05.5s , -06d 43' 37.0" }
         +/- 2.24755184633744 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.29784962668908 [arcmin] (formal 1-sigma fit error)
    SNR: 9.56480068744784
 
  Angular difference between the analysis and refined position is 2.627957 arcmin
 
  Partial Coding Fraction: 0.546875    [ including projection effects ]

  Duration
     T90: 8.88799995183945 +/- 2.29548512418709
        Measured from: 1.65199995040894
                   to: 10.5399999022484     [s; relative to TRIGTIME]
     T50: 4.22399997711182 +/- 1.74224222591427
        Measured from: 3.35599994659424
                   to: 7.57999992370605     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.93599998950958     
                   to: 3.93599998950958     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 1.09599995613098     
                   to: 11.0879999995232     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.061447   0.129985   0.123788   0.053335
           0.024748   0.023372   0.019920   0.016474 [error]
 Peak      0.016931   0.025171   0.022660   0.011348
           0.007897   0.007767   0.006413   0.005139 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    9.992    1.096   11.088
T90     8.888    1.652   10.540
T50     4.224    3.356    7.580
Peak    1.000    2.936    3.936
 
 
====== 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      -0.949    -0.328      0.362       -           -               -         2.55e-03     -4.95e-04          4.76e-04      57.100   57
CPL     -0.878     N/A        N/A         939.050      N/A           N/A         2.74e-03        N/A               N/A         57.200   56
 
 
=== 1-s peak 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      -1.430     -0.643     0.642       -           -               -         4.67e-03     -1.48e-03          1.47e-03     108.220   57
CPL     -1.455     -0.620     1.297     9999.360    -9999.360      -9999.360      4.64e-03     -1.44e-03          1.66e-02     108.230   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   1.95e-08  5.03e-08  1.04e-07  5.49e-07  2.81e-07  7.23e-07   erg/cm2
      90%_error_low -7.66e-09 -1.29e-08 -1.85e-08 -2.06e-07 -4.92e-08 -2.13e-07   erg/cm2
      90%_error_hi   9.05e-09  1.25e-08  1.83e-08  2.94e-07  4.93e-08  2.91e-07   erg/cm2
Peak flux       PL   1.80e-01  1.89e-01  1.40e-01  1.68e-01  5.73e-01  6.76e-01   ph/cm2/s
      90%_error_low -1.01e-01 -7.27e-02 -5.65e-02 -1.09e-01 -1.91e-01 -2.13e-01   ph/cm2/s
      90%_error_hi   1.23e-01  6.76e-02  5.26e-02  1.88e-01  1.92e-01  2.15e-01   ph/cm2/s
 
Fluence        CPL   1.99e-08  5.02e-08  1.03e-07  5.51e-07  2.82e-07  6.76e-07   erg/cm2
      90%_error_low    N/A       N/A    -1.88e-08 -3.67e-07 -5.46e-08 -3.20e-07   erg/cm2
      90%_error_hi     N/A       N/A     2.42e-08  1.33e-07  5.27e-08  3.23e-07   erg/cm2
Peak flux      CPL   1.68e-01  1.31e-01  7.08e-02  6.63e-02  3.96e-01  4.36e-01   ph/cm2/s
      90%_error_low -1.68e-01 -1.31e-01 -7.08e-02 -6.63e-02 -3.96e-01 -4.36e-01   ph/cm2/s
      90%_error_hi   1.14e-01  7.80e-02  3.42e-02  2.03e-02  2.28e-01  2.25e-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
  269.5229    -6.7270   0.0202    33.8515    21.5907         0.4031493      9.565 TRIG_00529582                 
 
Foreground time interval of the image:
  1.096  11.088 (delta_t =   9.992 [sec])
Background time interval of the image:
-239.600   1.096 (delta_t = 240.696 [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    1.096 sec. to   11.088 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.949486     ( -0.32801   0.36167 )
Norm@50keV  : 2.55071E-03    ( -0.000495062   0.000475854 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.10 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     57 degrees of freedom 
# Null hypothesis probability =   4.712797e-01
 
Photon flux (15-150 keV)    in 9.992 sec: 0.293044 ( -0.05634  0.057281 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.80732e-07 ( -4.91675e-08  4.92667e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.096 sec. to   11.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.877909     (       )
Epeak [keV] : 939.050      (   )
Norm@50keV  : 2.74021E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.20 using 59 PHA bins.
# Reduced chi-squared =          1.022 for     56 degrees of freedom 
# Null hypothesis probability =   4.301757e-01
 
Photon flux (15-150 keV)    in 9.992 sec: 0.295262 ( -0.064011  0.060263 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.8162e-07 ( -5.46004e-08  5.27082e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    2.936 sec. to    3.936 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.43041     ( -0.643275   0.642156 )
Norm@50keV  : 4.66928E-03    ( -0.00147952   0.0014686 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         108.22 using 59 PHA bins.
# Reduced chi-squared =         1.8986 for     57 degrees of freedom 
# Null hypothesis probability =   5.020632e-05
 
Photon flux (15-150 keV)    in 1 sec: 0.572687 ( -0.190868  0.192252 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.48528e-08 ( -1.53658e-08  1.55198e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.936 sec. to    3.936 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.45531     ( -0.626591   1.29099 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 4.64462E-03    ( -0.00147933   0.0165235 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         108.23 using 59 PHA bins.
# Reduced chi-squared =         1.9326 for     56 degrees of freedom 
# Null hypothesis probability =   3.525614e-05
 
Photon flux (15-150 keV)    in 1 sec: 0.396299 ( -0.396299  0.228356 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.46982e-08 ( -1.53366e-08  1.5776e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 8.888 sec.
Hardness ratio (energy fluence ratio) = 2.07128771812

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

S(15-50 keV)  = 6.974418e-08
S(50-150 keV) = 2.109868e-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 = 6.236824423584943E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.600000 1.096000

# RAcent #  [deg] 244.9867 -15.6346 255.9957 -37.8286 256.5036 -36.3968 263.0233 -24.7715 264.5203 -44.4830 268.3296  -1.4866 270.2770 -25.0694 270.3576 -25.5866 273.9976 -14.0152 275.9317 -30.4229 285.1048 -25.0719 263.0538 -33.8365 0.8867 -49.5266 276.3098 -37.2477 9.5251 -55.5648 18.2229 -66.4572 20.1815 -65.3129

Pre-slew

 Time interval of the image: 1.096000 11.088000

# RAcent #  [deg] 244.9216 -15.5938 255.9181 -38.0497 256.2288 -36.4221 263.1379 -24.6696 264.6991 -44.4638 268.4029  -1.5398 270.4228 -25.1689 270.3276 -25.8352 274.0182 -14.1457 276.0130 -30.3063 284.9123 -25.0200 263.0136 -33.6343 269.5229  -6.7270 14.0504 -58.7945 326.2179 -87.0510

Post-slew

 Time interval of the image: 129.300600 962.471600

# RAcent #  [deg] 244.9881 -15.6345 254.4427  35.3034 255.9378 -37.8652 256.2798 -36.4729 263.0100 -24.7439 264.5759 -44.4242 268.2935  -1.4332 270.2568 -25.0834 270.1702 -25.6499 273.9852 -14.1030 275.7936 -30.2626 284.8816 -24.8791 288.7922  10.9436 299.6383  35.1849 263.0029 -33.8203 287.5567  -5.7224 290.8802  24.4625 270.6298  30.5585 264.8007  36.5383 239.8959  30.8434

IMY = -2.468168698444961E-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] ['] 0.3 40.9 -19.7 9.4153 33.6 0.5 Sco X-1 1.2 22.1 -50.3 1.9394 10.0 1.0 4U 1700-377 3.5 21.9 -46.4 0.6525 3.3 3.7 GX 349+2 15.3 22.2 -11.6 0.1405 0.8 1.7 GX 1+4 6.2 16.1 -72.2 0.3653 1.9 9.7 4U 1735-44 3.3 39.2 22.8 1.1754 3.5 3.1 SW J1753.5-0127 1.6 17.4 1.8 1.2987 7.3 0.7 GX 5-1 111.3 16.9 0.9 0.0211 0.1 9.8 GRS 1758-258 2.2 25.5 25.0 1.0338 5.2 1.4 GX 17+2 7.7 10.1 3.8 0.2510 1.5 3.4 H1820-303 15.8 12.9 52.4 0.1242 0.7 9.8 HT1900.1-2455 4.7 17.5 -34.7 0.4767 2.5 3.2 GX 354-0 3.0 54.3 177.1 3.0274 3.8 ------ UNKNOWN 3.1 6.2 -38.1 0.6884 3.7 ------ UNKNOWN 3.4 57.2 -173.9 3.5763 3.4 ------ UNKNOWN 3.9 57.3 -160.1 3.4597 2.9 ------ UNKNOWN 3.2 58.5 -161.0 6.0932 3.6 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 12.6 41.0 -19.7 -0.0453 -0.9 4.4 Sco X-1 0.0 22.1 -51.0 0.0435 1.4 12.8 4U 1700-377 7.7 22.2 -46.6 0.0479 1.5 10.0 GX 349+2 6.7 22.2 -11.2 -0.0537 -1.7 8.4 GX 1+4 637.3 15.9 -72.2 -0.0006 -0.0 2.1 4U 1735-44 4.3 39.1 22.9 0.1424 2.7 5.6 SW J1753.5-0127 7.9 17.2 2.0 0.0453 1.4 9.3 GX 5-1 9.1 16.8 0.3 0.0390 1.3 5.7 GRS 1758-258 3.6 25.4 24.9 -0.1123 -3.2 6.6 GX 17+2 142.1 10.1 4.5 0.0024 0.1 5.8 H1820-303 6.1 12.9 51.6 0.0588 1.9 9.0 HT1900.1-2455 118.9 17.6 -34.1 -0.0030 -0.1 12.1 GX 354-0 1.2 33.9 21.6 0.4031 9.6 ------ UNKNOWN 1.9 58.3 -169.3 1.0740 6.1 ------ UNKNOWN 2.0 49.9 -134.4 0.7944 5.9 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.3 25.7 -130.2 31.4657 43.3 0.6 Sco X-1 4.3 44.4 -35.6 3.2500 2.7 2.5 Her X-1 3.4 33.5 -178.1 2.5053 3.4 2.6 4U 1700-377 3.4 32.2 -177.4 2.1913 3.4 8.1 GX 349+2 3.0 19.1 -179.2 1.9619 3.8 0.1 GX 1+4 4.7 38.0 168.0 2.0755 2.5 7.3 4U 1735-44 3.1 5.4 -31.7 2.2287 3.7 4.6 SW J1753.5-0127 1.7 18.4 160.3 3.6885 6.8 1.5 GX 5-1 10.4 18.9 160.6 0.6270 1.2 9.1 GRS 1758-258 1.3 8.6 132.3 4.6312 8.9 4.2 GX 17+2 4.1 24.3 149.1 1.8698 2.8 9.3 H1820-303 5.8 23.3 125.0 1.2707 2.0 8.8 HT1900.1-2455 0.5 26.0 29.6 13.5762 24.6 0.4 GRS 1915+105 2.4 50.6 14.2 8.0214 4.9 2.6 Cyg X-1 6.0 27.8 174.0 -1.2513 -1.9 1.1 GX 354-0 2.5 17.9 70.0 2.8576 4.6 ------ UNKNOWN 3.5 37.4 15.1 2.5806 3.3 ------ UNKNOWN 2.6 37.3 -16.3 3.1529 4.4 ------ UNKNOWN 2.5 43.5 -23.4 4.5276 4.6 ------ UNKNOWN 4.5 47.1 -53.3 7.9474 2.6 ------ 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