GRB100724A

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 17:26:09 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger429868
======================================================================

  Trigger: 00429868      Segment: 000

  BAT Trigger Time: 301624945.216   [s; MET]
      Trigger Stop: 301624946.24   [s; MET]
               UTC: 2010-07-24T00:42:19.202780    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 194.566197960917   Dec: -11.1213088935374  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.55
     Image Trigger?:     NO
     Rate S/N Ratio:     19.157244060668  [ if not an image trigger ]
     Image S/N Ratio:    10.55

  Analysis Position:   [ source = BAT ]
    RA: 194.566197960917   Dec: -11.1213088935374  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 194.568537601933   Dec: -11.0943885705126  [deg; J2000]  
        { 12h 58m 16.4s , -11d 05' 39.8" }
         +/- 1.70400275741798 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.652239998894621 [arcmin] (formal 1-sigma fit error)
    SNR: 14.2051731743885
 
  Angular difference between the analysis and refined position is 1.621082 arcmin
 
  Partial Coding Fraction: 0.4335938    [ including projection effects ]

  Duration
     T90: 1.38799995183945 +/- 0.15579471580594
        Measured from: 0.148000001907349
                   to: 1.5359999537468     [s; relative to TRIGTIME]
     T50: 0.675999999046326 +/- 0.202385728029818
        Measured from: 0.387999951839447
                   to: 1.06399995088577     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0879999995231628     
                   to: 1.08799999952316     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0839999914169312     
                   to: 1.64800000190735     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.089869   0.124246   0.055702   0.010843
           0.010600   0.011411   0.010617   0.009438 [error]
 Peak      0.060697   0.097649   0.049617   0.005354
           0.008619   0.009437   0.008718   0.007336 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    1.564    0.084    1.648
T90     1.388    0.148    1.536
T50     0.676    0.388    1.064
Peak    1.000    0.088    1.088
 
 
====== 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      -1.923    -0.214      0.201       -           -               -         1.12e-02     -1.63e-03          1.60e-03      55.030   57
CPL     -0.505    -1.047      1.275       42.500      -8.198        15.177      7.65e-02     -7.65e-02          3.59e-01      49.420   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      -1.846     -0.218     0.206       -           -               -         1.35e-02     -2.03e-03          2.00e-03      52.420   57
CPL      0.037     -1.125     1.409       45.155      -7.092        11.797      1.63e-01     -1.63e-01          8.98e-01      43.250   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   3.34e-08  4.74e-08  5.00e-08  9.75e-08  1.61e-07  2.28e-07   erg/cm2
      90%_error_low -5.20e-09 -5.51e-09 -9.67e-09 -3.25e-08 -2.26e-08 -4.46e-08   erg/cm2
      90%_error_hi   5.33e-09  5.50e-09  9.90e-09  4.17e-08  2.31e-08  5.19e-08   erg/cm2
Peak flux       PL   7.74e-01  6.35e-01  3.53e-01  2.90e-01  1.89e+00  2.05e+00   ph/cm2/s
      90%_error_low -1.33e-01 -7.95e-02 -6.77e-02 -9.30e-02 -2.37e-01 -2.62e-01   ph/cm2/s
      90%_error_hi   1.37e-01  7.95e-02  6.86e-02  1.16e-01  2.37e-01  2.63e-01   ph/cm2/s
 
Fluence        CPL   3.00e-08  5.57e-08  4.50e-08  1.28e-08  1.41e-07  1.44e-07   erg/cm2
      90%_error_low -6.06e-09 -8.07e-09 -1.30e-08 -9.83e-09 -2.24e-08 -2.46e-08   erg/cm2
      90%_error_hi   6.03e-09  8.22e-09  1.24e-08  3.78e-08  2.57e-08  4.36e-08   erg/cm2
Peak flux      CPL   6.43e-01  7.79e-01  3.42e-01  4.10e-02  1.80e+00  1.81e+00   ph/cm2/s
      90%_error_low -1.58e-01 -1.14e-01 -9.13e-02 -4.10e-02 -2.38e-01 -2.41e-01   ph/cm2/s
      90%_error_hi   1.60e-01  1.18e-01  8.71e-02  8.22e-02  2.40e-01  2.46e-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
  194.5685   -11.0944   0.0136    33.6283    38.4928         0.3046063     14.205 TRIG_00429868                 
 
Foreground time interval of the image:
  0.084   1.648 (delta_t =   1.564 [sec])
Background time interval of the image:
-239.216   0.084 (delta_t = 239.300 [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    0.084 sec. to    1.648 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.92336     ( -0.21394   0.201199 )
Norm@50keV  : 1.12170E-02    ( -0.00163388   0.00159966 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.03 using 59 PHA bins.
# Reduced chi-squared =         0.9655 for     57 degrees of freedom 
# Null hypothesis probability =   5.492685e-01
 
Photon flux (15-150 keV)    in 1.564 sec: 1.62606 ( -0.1868  0.18681 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.61367e-07 ( -2.25682e-08  2.31286e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.084 sec. to    1.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.505062     ( -1.04667   1.2754 )
Epeak [keV] : 42.4999      ( -8.19851 15.1766 )
Norm@50keV  : 7.65264E-02    ( -0.0765289   0.359076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.42 using 59 PHA bins.
# Reduced chi-squared =         0.8825 for     56 degrees of freedom 
# Null hypothesis probability =   7.204400e-01
 
Photon flux (15-150 keV)    in 1.564 sec: 1.55381 ( -0.1908  0.19236 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41006e-07 ( -2.24379e-08  2.57331e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.088 sec. to    1.088 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.84621     ( -0.218292   0.205874 )
Norm@50keV  : 1.34781E-02    ( -0.00203382   0.00199546 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.42 using 59 PHA bins.
# Reduced chi-squared =         0.9197 for     57 degrees of freedom 
# Null hypothesis probability =   6.473129e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.89169 ( -0.23664  0.23665 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23954e-07 ( -1.85056e-08  1.89124e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.088 sec. to    1.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.037099     ( -1.12505   1.40878 )
Epeak [keV] : 45.1547      ( -7.09223 11.7971 )
Norm@50keV  : 0.162792    ( -0.162794   0.898274 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.25 using 59 PHA bins.
# Reduced chi-squared =         0.7724 for     56 degrees of freedom 
# Null hypothesis probability =   8.935842e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.80066 ( -0.23843  0.24006 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.07436e-07 ( -1.74448e-08  1.95249e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 1.388 sec.
Hardness ratio (energy fluence ratio) = 1.054629777

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

S(15-50 keV)  = 8.082083e-08
S(50-150 keV) = 8.054997e-08

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 = 5.205738703707901E-01, IMY = -4.139757957473527E-01

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:
-239.216000 0.084000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5235 -40.5409    1.0  35.8  159.4   3.2150  11.4    0.9	Vela X-1                      
169.0540  38.0047    2.6  50.8  -44.5   4.4616   4.4 ------	UNKNOWN

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
0.084000 1.648000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4532 -40.4422    3.6  35.8  159.6  -0.0604  -3.2    7.6	Vela X-1                      
194.5685 -11.0944    0.8  33.6   38.5   0.3046  14.2 ------	UNKNOWN                       
131.3703  17.4768    1.8  41.1  -98.0   0.3157   6.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
72.684600 962.871900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.0839 -60.6054   10.5  52.7  171.2   1.8575   1.1    6.9	Cen X-3                       
186.7007 -62.7725    1.9  52.0  160.9  11.9088   6.2    1.2	GX 301-2                      
167.0346 -10.0337    2.9  27.1 -114.0   2.2940   4.0 ------	UNKNOWN                       
170.0470  29.5436    4.3  47.0  -53.2   7.3766   2.7 ------	UNKNOWN                       
160.2018  11.7926    2.4  41.1  -80.8  10.0543   4.9 ------	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 source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Pre-slew background subtracted image of 15-350 keV band

Post-slew image of 15-350 keV band

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