GRB100504A

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: Fri Jan 17 18:42:12 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger421124
======================================================================

  Trigger: 00421124      Segment: 000

  BAT Trigger Time: 294693665.28   [s; MET]
      Trigger Stop: 294693666.304   [s; MET]
               UTC: 2010-05-04T19:20:59.512540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 255.572346509643   Dec: -35.598882010796  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.86
     Image Trigger?:     NO
     Rate S/N Ratio:     22.494443758404  [ if not an image trigger ]
     Image S/N Ratio:    12.86

  Analysis Position:   [ source = BAT ]
    RA: 255.572346509643   Dec: -35.598882010796  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 255.575114996708   Dec: -35.5897503832536  [deg; J2000]  
        { 17h 02m 18.0s , -35d 35' 23.1" }
         +/- 0.796118780377314 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.210892268506505 [arcmin] (formal 1-sigma fit error)
    SNR: 42.1287493912533
 
  Angular difference between the analysis and refined position is 0.564302 arcmin
 
  Partial Coding Fraction: 0.9296875    [ including projection effects ]

  Duration
     T90: 97.0039999485016 +/- 8.30478054933255
        Measured from: -6.07599997520447
                   to: 90.9279999732971     [s; relative to TRIGTIME]
     T50: 15.9639999866486 +/- 3.88017728475779
        Measured from: 0.740000009536743
                   to: 16.7039999961853     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 7.59200000762939     
                   to: 8.59200000762939     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -9.69599997997284     
                   to: 102.456000030041     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.448332   1.567601   0.970883   0.146565
           0.070698   0.065394   0.058083   0.057480 [error]
 Peak      0.061169   0.078382   0.052719   0.009956
           0.007460   0.007151   0.006505   0.005693 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  112.152   -9.696  102.456
T90    97.004   -6.076   90.928
T50    15.964    0.740   16.704
Peak    1.000    7.592    8.592
 
 
====== 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      -1.765    -0.101      0.100       -           -               -         2.27e-03     -1.24e-04          1.23e-04      61.450   57
CPL     -1.682    -0.355      0.402      179.775    -114.081      -179.775      2.50e-03     -3.69e-04          1.52e-03      61.310   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      -1.628     -0.194     0.189       -           -               -         1.29e-02     -1.46e-03          1.44e-03      52.340   57
CPL     -1.347     -0.733     0.831      110.920     -53.254      -110.920      1.81e-02     -6.53e-03          3.02e-02      51.910   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   4.16e-07  6.51e-07  7.66e-07  1.75e-06  2.34e-06  3.58e-06   erg/cm2
      90%_error_low -3.58e-08 -3.30e-08 -5.84e-08 -2.72e-07 -1.32e-07 -3.21e-07   erg/cm2
      90%_error_hi   3.68e-08  3.29e-08  5.87e-08  3.07e-07  1.33e-07  3.49e-07   erg/cm2
Peak flux       PL   6.02e-01  5.62e-01  3.64e-01  3.63e-01  1.68e+00  1.89e+00   ph/cm2/s
      90%_error_low -1.01e-01 -5.94e-02 -5.38e-02 -9.87e-02 -1.73e-01 -1.98e-01   ph/cm2/s
      90%_error_hi   1.06e-01  5.91e-02  5.36e-02  1.20e-01  1.74e-01  1.99e-01   ph/cm2/s
 
Fluence        CPL   4.11e-07  6.56e-07  7.67e-07  1.51e-06  2.32e-06  3.34e-06   erg/cm2
      90%_error_low -4.31e-08 -3.67e-08 -5.92e-08 -7.10e-07 -1.65e-07 -7.37e-07   erg/cm2
      90%_error_hi   3.77e-08  4.00e-08  5.95e-08  2.98e-07  1.51e-07  3.48e-07   erg/cm2
Peak flux      CPL   5.76e-01  5.77e-01  3.69e-01  2.54e-01  1.65e+00  1.78e+00   ph/cm2/s
      90%_error_low -1.22e-01 -6.97e-02 -5.65e-02 -1.49e-01 -1.85e-01 -2.54e-01   ph/cm2/s
      90%_error_hi   1.23e-01  7.30e-02  5.80e-02  1.39e-01  1.84e-01  2.64e-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
  255.5751   -35.5898   0.0046    17.1329    26.9289         2.7723581     42.129 TRIG_00421124                 
 
Foreground time interval of the image:
 -9.696  11.621 (delta_t =  21.317 [sec])
Background time interval of the image:
-239.280  -9.696 (delta_t = 229.584 [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   -9.696 sec. to  102.456 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.76457     ( -0.100956   0.099807 )
Norm@50keV  : 2.26516E-03    ( -0.00012369   0.000122726 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.45 using 59 PHA bins.
# Reduced chi-squared =          1.078 for     57 degrees of freedom 
# Null hypothesis probability =   3.196740e-01
 
Photon flux (15-150 keV)    in 112.2 sec: 0.307966 ( -0.015866  0.015922 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.34366e-06 ( -1.32177e-07  1.33441e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -9.696 sec. to  102.456 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.6819     ( -0.35461   0.402695 )
Epeak [keV] : 179.775      ( -114.996 -180.691 )
Norm@50keV  : 2.50299E-03    ( -0.000367871   0.00152115 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.31 using 59 PHA bins.
# Reduced chi-squared =          1.095 for     56 degrees of freedom 
# Null hypothesis probability =   2.912876e-01
 
Photon flux (15-150 keV)    in 112.2 sec: 0.306161 ( -0.017824  0.0172 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.32152e-06 ( -1.65349e-07  1.50962e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    7.592 sec. to    8.592 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.62784     ( -0.194116   0.189009 )
Norm@50keV  : 1.29382E-02    ( -0.00146084   0.0014387 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.34 using 59 PHA bins.
# Reduced chi-squared =         0.9182 for     57 degrees of freedom 
# Null hypothesis probability =   6.502567e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.67733 ( -0.17348  0.1737 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20626e-07 ( -1.45737e-08  1.48243e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    7.592 sec. to    8.592 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.34743     ( -0.73299   0.830967 )
Epeak [keV] : 110.920      ( -53.2627 -110.929 )
Norm@50keV  : 1.81451E-02    ( -0.00652535   0.0302428 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.91 using 59 PHA bins.
# Reduced chi-squared =         0.9269 for     56 degrees of freedom 
# Null hypothesis probability =   6.304557e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.65331 ( -0.18478  0.1838 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.17455e-07 ( -1.66249e-08  1.67473e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 97.004 sec.
Hardness ratio (energy fluence ratio) = 1.17728062136

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

S(15-50 keV)  = 1.0672922e-06
S(50-150 keV) = 1.2763574e-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 = 2.748437865463495E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.280000 -9.696000

# RAcent #  [deg] 244.9933 -15.6436 255.7643 -37.9460 256.3834 -36.3820 263.0460 -24.5998 264.8135 -44.5130 268.2993  -1.3757 270.2926 -25.0709 270.3500 -25.7121 273.9277 -14.0219 275.9713 -30.3656 285.1943 -24.8207 288.7775  10.9326 263.1669 -33.8451 247.8931   9.0422

Pre-slew

 Time interval of the image: -9.696000 11.620600

# RAcent #  [deg] 244.8241 -15.6812 256.1814 -37.8226 256.4363 -36.4225 263.0439 -24.9052 264.9770 -44.3307 268.5053  -1.4825 270.0946 -25.2038 270.1427 -25.6946  189.3 273.9503 -14.1797 276.1170 -30.2347 284.8759 -24.8307 288.9034  10.8299 263.1241 -34.0129 257.8187 -17.8130 255.5751 -35.5836 279.1321  -0.2602 275.6320 -45.5400 288.7680 -75.1575 297.0118 -45.7265 311.2707 -18.0784 308.9176   2.6116 UNKNOWN

Post-slew

 Time interval of the image: 51.620600 962.796300

# RAcent #  [deg] 186.5759 -62.6769 244.9746 -15.6433 255.7361 -37.9210 256.3852 -36.4082 263.2163 -24.6555 264.9883 -44.3961 268.4398  -1.6094 270.3240 -25.0406 270.4253 -25.6259 273.9717 -14.0402 276.0499 -30.2906 285.1096 -25.0779 288.7733  10.9529 262.8514 -33.9522 209.1114 -26.2950 155.3460 -82.0129 326.4229 -73.1430 306.7153 -35.3697

IMY = -1.396105504656576E-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 22.8 93.2 11.7165 35.4 0.8 Sco X-1 0.0 18.8 21.6 -0.3333 -1.4 12.2 4U 1700-377 4.5 17.3 23.5 0.5930 2.5 3.5 GX 349+2 4.9 5.1 53.5 0.5690 2.3 9.0 GX 1+4 5.6 22.3 -3.7 0.5106 2.1 4.8 4U 1735-44 4.6 21.0 170.7 0.6578 2.5 6.2 SW J1753.5-0127 2.0 3.4 -46.1 1.5143 5.9 0.7 GX 5-1 5.0 3.9 -41.0 0.6140 2.5 3.2 GRS 1758-258 2.3 10.0 -155.3 1.2691 5.0 4.6 GX 17+2 6.6 10.7 -49.6 0.4474 1.7 2.4 H1820-303 99.3 15.8 -87.6 -0.0326 -0.1 10.5 HT1900.1-2455 1.6 39.0 -156.4 2.9930 7.2 1.5 GRS 1915+105 11.1 12.3 9.8 0.2728 1.0 8.9 GX 354-0 2.7 37.1 135.8 2.4116 4.3 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 337.0 23.0 93.0 0.0030 0.0 9.3 Sco X-1 759.5 18.5 21.0 -0.0010 -0.0 9.3 4U 1700-377 8.8 17.3 23.3 -0.0879 -1.3 0.1 GX 349+2 5.2 5.3 50.5 -0.1396 -2.2 9.8 GX 1+4 0.0 22.1 -3.9 -0.1643 -2.5 12.3 4U 1735-44 3.1 20.9 171.3 -0.2499 -3.7 8.4 SW J1753.5-0127 0.0 3.4 -42.3 -0.0309 -0.5 12.7 GX 5-1 3.8 -38.8 -0.0044 -0.1 9.1 GRS 1758-258 28.6 9.9 -154.7 0.0254 0.4 9.2 GX 17+2 0.0 10.6 -50.6 0.1837 2.9 12.7 H1820-303 6.2 15.6 -87.4 0.1272 1.9 10.2 HT1900.1-2455 4.9 39.0 -156.1 0.2157 2.3 9.3 GRS 1915+105 0.0 12.4 9.7 0.0569 0.9 12.6 GX 354-0 2.5 10.7 103.6 0.3064 4.6 ------ UNKNOWN 0.3 17.1 26.9 2.6174 39.4 ------ UNKNOWN 2.5 24.6 -162.4 0.2855 4.6 ------ UNKNOWN 2.4 24.0 -22.9 0.3156 4.9 ------ UNKNOWN 2.3 53.9 -16.3 1.0160 5.0 ------ UNKNOWN 2.6 33.1 -48.0 0.3930 4.4 ------ UNKNOWN 3.2 40.6 -97.8 0.9273 3.7 ------ UNKNOWN 2.0 47.0 -126.6 1.7078 5.8 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 9.7 49.4 10.5 2.0176 1.2 6.0 GX 301-2 0.2 22.1 128.0 48.8597 56.2 0.3 Sco X-1 0.0 2.3 -27.2 0.1580 0.2 12.7 4U 1700-377 2.5 1.0 -63.1 3.5228 4.6 2.6 GX 349+2 0.0 12.8 -170.8 0.9107 1.1 12.5 GX 1+4 3.6 11.4 -60.3 2.3033 3.2 11.0 4U 1735-44 8.9 36.0 178.3 1.1999 1.3 10.3 SW J1753.5-0127 1.4 16.5 -149.6 6.1061 8.2 3.2 GX 5-1 4.4 16.2 -147.9 2.1069 2.8 9.7 GRS 1758-258 3.4 27.2 -161.8 2.8296 3.4 2.0 GX 17+2 3.0 18.0 -125.3 3.3166 3.9 7.9 H1820-303 8.9 27.4 -128.3 -1.2856 -1.3 10.3 HT1900.1-2455 9.5 56.1 -163.6 3.6669 1.2 1.5 GRS 1915+105 9.8 6.2 -127.3 0.9118 1.2 9.8 GX 354-0 2.5 40.5 66.0 15.1241 4.6 ------ UNKNOWN 4.3 56.2 -14.4 8.3983 2.7 ------ UNKNOWN 3.7 50.6 -44.7 15.4038 3.2 ------ UNKNOWN 4.4 41.2 -98.7 12.7949 2.7 ------ 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