GRB100928A

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 15:50:21 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger435160
======================================================================

  Trigger: 00435160      Segment: 000

  BAT Trigger Time: 307333198.976   [s; MET]
      Trigger Stop: 307333203.072   [s; MET]
               UTC: 2010-09-28T02:19:52.757060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 223.036447846036   Dec: -28.5612167730146  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.79
     Image Trigger?:     NO
     Rate S/N Ratio:     9.16515138991168  [ if not an image trigger ]
     Image S/N Ratio:    6.79

  Analysis Position:   [ source = BAT ]
    RA: 223.036447846036   Dec: -28.5612167730146  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 223.040691104306   Dec: -28.5441154179116  [deg; J2000]  
        { 14h 52m 09.8s , -28d 32' 38.8" }
         +/- 2.2353246800407 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.35851160532715 [arcmin] (formal 1-sigma fit error)
    SNR: 9.63962992433249
 
  Angular difference between the analysis and refined position is 1.050168 arcmin
 
  Partial Coding Fraction: 0.1523438    [ including projection effects ]

  Duration
     T90: 4.16000002622604 +/- 1.0160944903206
        Measured from: 0.0239999890327454
                   to: 4.18400001525879     [s; relative to TRIGTIME]
     T50: 1.9200000166893 +/- 0.754082232309191
        Measured from: 1.43199998140335
                   to: 3.35199999809265     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.30799996852875     
                   to: 2.30799996852875     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.296000003814697     
                   to: 4.42399996519089     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.211116   0.245989   0.185206   0.028495
           0.041529   0.035279   0.030190   0.023473 [error]
 Peak      0.101767   0.099009   0.059171   0.010502
           0.019701   0.017547   0.014402   0.010983 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    4.720   -0.296    4.424
T90     4.160    0.024    4.184
T50     1.920    1.432    3.352
Peak    1.000    1.308    2.308
 
 
====== 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      -1.796    -0.292      0.280       -           -               -         8.99e-03     -1.52e-03          1.49e-03      55.660   57
CPL     -1.365    -0.895      1.287       73.317      N/A           N/A         1.48e-02        N/A               N/A         55.200   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      -2.117     -0.407     0.362       -           -               -         1.52e-02     -3.79e-03          3.57e-03      65.630   57
CPL     -1.994     -0.020     0.303        4.277      N/A           N/A         1.69e-02        N/A               N/A         65.790   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   7.16e-08  1.10e-07  1.26e-07  2.79e-07  3.91e-07  5.87e-07   erg/cm2
      90%_error_low -1.80e-08 -1.78e-08 -2.82e-08 -1.12e-07 -6.65e-08 -1.41e-07   erg/cm2
      90%_error_hi   1.94e-08  1.77e-08  2.80e-08  1.51e-07  6.72e-08  1.69e-07   erg/cm2
Peak flux       PL   1.14e+00  7.97e-01  3.67e-01  2.37e-01  2.42e+00  2.54e+00   ph/cm2/s
      90%_error_low -3.19e-01 -1.52e-01 -1.17e-01 -1.21e-01 -4.72e-01 -4.85e-01   ph/cm2/s
      90%_error_hi   3.41e-01  1.52e-01  1.18e-01  1.75e-01  4.73e-01  4.85e-01   ph/cm2/s
 
Fluence        CPL   6.64e-08  1.15e-07  1.30e-07  1.55e-07  3.80e-07  4.66e-07   erg/cm2
      90%_error_low -2.19e-08 -1.97e-08 -3.02e-08 -1.15e-07 -7.17e-08 -1.41e-07   erg/cm2
      90%_error_hi   2.27e-08  2.19e-08  3.13e-08  2.73e-07  7.19e-08  1.85e-07   erg/cm2
Peak flux      CPL   1.10e+00  6.83e-01  3.76e-01  2.28e-01  2.39e+00  2.50e+00   ph/cm2/s
      90%_error_low -3.18e-01 -3.94e-01 -1.21e-01     N/A   -4.54e-01 -4.93e-01   ph/cm2/s
      90%_error_hi   2.98e-01  1.56e-01  1.12e-01     N/A    4.64e-01  5.08e-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
  223.0407   -28.5441   0.0199    37.7504   -93.1662         0.6932722      9.640 TRIG_00435160                 
 
Foreground time interval of the image:
 -0.296   4.424 (delta_t =   4.720 [sec])
Background time interval of the image:
-239.976  -0.296 (delta_t = 239.680 [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    4.424 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.796     ( -0.292341   0.279759 )
Norm@50keV  : 8.98611E-03    ( -0.00152014   0.00149413 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.66 using 59 PHA bins.
# Reduced chi-squared =         0.9766 for     57 degrees of freedom 
# Null hypothesis probability =   5.253008e-01
 
Photon flux (15-150 keV)    in 4.72 sec: 1.23642 ( -0.20395  0.20523 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90582e-07 ( -6.64722e-08  6.7193e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.296 sec. to    4.424 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.36513     ( -0.894858   1.28689 )
Epeak [keV] : 73.3168      (   )
Norm@50keV  : 1.48491E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.20 using 59 PHA bins.
# Reduced chi-squared =         0.9857 for     56 degrees of freedom 
# Null hypothesis probability =   5.052289e-01
 
Photon flux (15-150 keV)    in 4.72 sec: 1.20844 ( -0.215386  0.2161 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.79972e-07 ( -7.16874e-08  7.19271e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    1.308 sec. to    2.308 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.11738     ( -0.40695   0.361959 )
Norm@50keV  : 1.52299E-02    ( -0.00378566   0.00356866 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.63 using 59 PHA bins.
# Reduced chi-squared =          1.151 for     57 degrees of freedom 
# Null hypothesis probability =   2.024868e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.41703 ( -0.47184  0.4732 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41775e-07 ( -3.06479e-08  3.12226e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.308 sec. to    2.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.21887     ( -0.0154569   0.308116 )
Epeak [keV] : 100.907      (   )
Norm@50keV  : 1.31297E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.51 using 59 PHA bins.
# Reduced chi-squared =          1.170 for     56 degrees of freedom 
# Null hypothesis probability =   1.802688e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.39182 ( -0.45365  0.46366 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 4.16 sec.
Hardness ratio (energy fluence ratio) = 1.1519408082

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

S(15-50 keV)  = 1.8136784e-07
S(50-150 keV) = 2.092197e-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 = -4.276569109937540E-02,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.976000 -0.296000

# RAcent #  [deg] 244.9807 -15.6401 256.0314 -37.8528 256.4620 -36.5639 262.9601 -24.8325 264.9459 -44.4436 268.3181  -1.3918 270.3268 -25.1037 270.1325 -25.7336 273.8679 -14.1119 275.8055 -30.2931 285.0174 -24.9097 288.7237  10.9681 263.1712 -33.8457 304.7948 -20.3337 291.6036   4.2096 276.9072  23.0713 260.7846  -7.9141 259.9297   2.5618 254.7720 -15.2594 238.6787 -17.1476 200.5701 -76.0101 UNKNOWN UNKNOWN

Pre-slew

 Time interval of the image: -0.296000 4.424000

# RAcent #  [deg] 245.1403 -15.4947 255.9856 -37.8433 256.4273 -36.4391 263.0119 -24.7997 264.7456 -44.5926 268.2582  -1.6150 270.4239 -25.0439 270.1637 -25.9136 273.8862 -14.2041 275.7755 -30.4843 285.2247 -24.9747 288.7801  10.9892 262.7931 -33.6990 323.2582 -66.9999 244.8260   7.8783 242.3410  12.7093 202.1438 -66.4913 223.0407 -28.5441

Post-slew

 Time interval of the image: 569.324600 962.107000

# RAcent #  [deg] 186.4988 -62.9671 244.9743 -15.6430 256.0214 -37.8636 256.4895 -36.5418 262.9703 -24.6762 264.7525 -44.5995 268.2820  -1.3458 270.2904 -25.1044 270.1382 -25.7595 274.0340 -14.0549 275.7913 -30.5323 285.0253 -24.9397 262.8164 -33.9908 319.9488 -58.1420 272.3427   9.4346 267.9651   8.1644 254.7977 -15.2489 244.2718 -12.2512 235.3069 -38.6201 185.5249 -63.3040 222.7737  -0.6993

IMY = 7.731133110912413E-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] ['] 0.2 23.8 -53.5 19.0889 64.5 0.1 Sco X-1 2.6 12.4 -131.6 1.0480 4.4 2.2 4U 1700-377 5.7 11.3 -128.0 0.4938 2.0 8.5 GX 349+2 2.3 5.1 -29.9 1.3442 5.0 5.9 GX 1+4 7.4 15.5 -169.2 0.3839 1.6 8.7 4U 1735-44 8.4 27.6 11.3 0.3944 1.4 4.7 SW J1753.5-0127 1.8 5.2 50.5 1.6617 6.4 2.7 GX 5-1 11.5 4.7 54.1 0.2707 1.0 9.2 GRS 1758-258 3.3 16.4 33.8 0.8361 3.5 9.2 GX 17+2 3.4 8.3 108.6 0.7774 3.4 7.6 H1820-303 4.7 17.1 87.7 0.7167 2.4 1.2 HT1900.1-2455 4.0 45.4 38.7 3.0160 2.9 4.6 GRS 1915+105 4.0 5.6 -144.7 0.7088 2.9 9.1 GX 354-0 3.1 35.8 92.0 2.5275 3.8 ------ UNKNOWN 3.7 41.1 47.4 2.2286 3.1 ------ UNKNOWN 3.1 53.0 19.2 4.9102 3.8 ------ UNKNOWN 3.4 21.7 -8.0 0.8955 3.4 ------ UNKNOWN 2.9 32.1 -5.1 1.1716 3.9 ------ UNKNOWN 2.1 17.4 -33.4 1.3418 5.5 ------ UNKNOWN 2.6 28.0 -64.1 1.3550 4.4 ------ UNKNOWN 2.8 56.2 -157.6 4.5168 4.1 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.0 23.7 -52.9 -0.0250 -0.9 12.8 Sco X-1 42.5 12.4 -131.5 -0.0065 -0.3 0.1 4U 1700-377 523.8 11.2 -127.4 -0.0005 -0.0 1.0 GX 349+2 4.9 5.1 -29.3 -0.0539 -2.3 3.3 GX 1+4 10.6 15.7 -168.7 0.0260 1.1 8.6 4U 1735-44 0.0 27.4 11.2 0.0138 0.5 11.8 SW J1753.5-0127 4.0 5.3 50.8 -0.0680 -2.9 7.9 GX 5-1 0.0 4.6 55.9 -0.0321 -1.4 12.7 GRS 1758-258 0.0 16.3 33.9 -0.0254 -1.0 12.2 GX 17+2 4.9 8.3 109.9 -0.0549 -2.4 10.5 H1820-303 6.4 17.3 88.1 0.0479 1.8 10.8 HT1900.1-2455 32.2 45.4 38.8 0.0280 0.4 2.8 GRS 1915+105 0.0 5.6 -141.2 0.0277 1.2 12.7 GX 354-0 2.1 50.8 162.0 0.4512 5.5 ------ UNKNOWN 2.2 42.3 -25.6 0.2059 5.1 ------ UNKNOWN 3.0 47.7 -25.4 0.1884 3.9 ------ UNKNOWN 1.9 53.4 -146.4 0.6533 6.1 ------ UNKNOWN 1.2 37.8 -93.2 0.6936 9.6 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 7.8 52.8 -146.8 2.5086 1.5 12.6 GX 301-2 0.1 21.7 -38.4 36.3166 82.5 0.3 Sco X-1 2.7 5.1 -154.0 1.8603 4.3 2.0 4U 1700-377 2.2 3.7 -149.8 2.1679 5.2 7.6 GX 349+2 1.9 9.4 24.1 2.6176 6.0 4.7 GX 1+4 15.2 12.2 159.8 0.3091 0.8 9.0 4U 1735-44 7.0 33.2 17.7 0.9272 1.6 8.2 SW J1753.5-0127 1.8 12.9 53.8 2.7355 6.3 1.6 GX 5-1 18.1 12.4 55.6 0.2764 0.6 8.9 GRS 1758-258 4.4 23.7 39.5 1.4044 2.6 2.0 GX 17+2 4.6 14.7 83.9 1.0927 2.5 12.1 H1820-303 48.3 24.3 77.0 0.1453 0.2 1.3 HT1900.1-2455 0.0 3.4 102.7 -0.3888 -0.9 12.7 GX 354-0 3.1 47.2 141.2 6.8962 3.8 ------ UNKNOWN 2.7 44.7 19.4 4.0009 4.3 ------ UNKNOWN 2.2 42.4 13.7 3.5976 5.2 ------ UNKNOWN 2.0 18.4 -12.1 2.4478 5.8 ------ UNKNOWN 2.0 24.9 -35.4 2.4867 5.7 ------ UNKNOWN 2.0 19.7 -112.1 2.6759 5.9 ------ UNKNOWN 2.2 53.2 -147.3 8.9257 5.2 ------ UNKNOWN 3.2 47.0 -53.3 7.5822 3.6 ------ 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