GRB100702A

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 17:43:27 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger426438
======================================================================

  Trigger: 00426438      Segment: 000

  BAT Trigger Time: 299725433.152   [s; MET]
      Trigger Stop: 299725433.28   [s; MET]
               UTC: 2010-07-02T01:03:47.206620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 245.70251985758   Dec: -56.5377013538901  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.19
     Image Trigger?:     NO
     Rate S/N Ratio:     37.3764631820615  [ if not an image trigger ]
     Image S/N Ratio:    14.19

  Analysis Position:   [ source = BAT ]
    RA: 245.70251985758   Dec: -56.5377013538901  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 245.682042175774   Dec: -56.5487174681959  [deg; J2000]  
        { 16h 22m 43.7s , -56d 32' 55.4" }
         +/- 1.46282665473369 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.575481466726513 [arcmin] (formal 1-sigma fit error)
    SNR: 17.6656073234474
 
  Angular difference between the analysis and refined position is 0.946419 arcmin
 
  Partial Coding Fraction: 0.6171875    [ including projection effects ]

  Duration
     T90: 0.512000024318695 +/- 0.143108374017273
        Measured from: -0.304000020027161
                   to: 0.208000004291534     [s; relative to TRIGTIME]
     T50: 0.0640000104904175 +/- 0.0640000104904175
        Measured from: 0.015999972820282
                   to: 0.0799999833106995     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.516000032424927     
                   to: 0.483999967575073     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.304000020027161     
                   to: 0.208000004291534     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.056038   0.092318   0.064665   0.017689
           0.007506   0.007474   0.006474   0.004797 [error]
 Peak      0.060689   0.103080   0.071667   0.017280
           0.009752   0.009247   0.007961   0.006236 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.512   -0.304    0.208
T90     0.512   -0.304    0.208
T50     0.064    0.016    0.080
Peak    1.000   -0.516    0.484
 
 
====== 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      -1.611    -0.167      0.164       -           -               -         3.00e-02     -2.95e-03          2.94e-03      57.820   57
CPL     -1.057    -0.619      0.756       87.496     -25.439       -87.496      5.64e-02     -2.77e-02          7.39e-02      55.730   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      -1.607     -0.191     0.187       -           -               -         1.71e-02     -1.88e-03          1.87e-03      50.360   57
CPL     -1.077     -0.653     0.867       90.522     -24.606       -90.522      3.10e-02     -1.51e-02          4.88e-02      48.890   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   2.18e-08  3.74e-08  4.90e-08  1.30e-07  1.44e-07  2.38e-07   erg/cm2
      90%_error_low -3.46e-09 -3.76e-09 -6.20e-09 -3.18e-08 -1.49e-08 -3.73e-08   erg/cm2
      90%_error_hi   3.62e-09  3.74e-09  6.15e-09  3.78e-08  1.50e-08  4.19e-08   erg/cm2
Peak flux       PL   7.79e-01  7.36e-01  4.83e-01  4.92e-01  2.20e+00  2.49e+00   ph/cm2/s
      90%_error_low -1.43e-01 -8.60e-02 -6.64e-02 -1.26e-01 -2.47e-01 -2.67e-01   ph/cm2/s
      90%_error_hi   1.52e-01  8.52e-02  6.57e-02  1.49e-01  2.48e-01  2.67e-01   ph/cm2/s
 
Fluence        CPL   1.97e-08  3.94e-08  5.11e-08  6.36e-08  1.39e-07  1.74e-07   erg/cm2
      90%_error_low -4.21e-09 -4.45e-09 -6.87e-09 -3.42e-08 -1.60e-08 -3.79e-08   erg/cm2
      90%_error_hi   4.35e-09  4.60e-09  7.05e-09  7.74e-08  1.60e-08  8.03e-08   erg/cm2
Peak flux      CPL   6.97e-01  7.66e-01  5.07e-01  2.93e-01  2.14e+00  2.26e+00   ph/cm2/s
      90%_error_low -1.78e-01 -9.66e-02 -7.54e-02 -1.50e-01 -2.61e-01 -3.19e-01   ph/cm2/s
      90%_error_hi   1.85e-01  9.93e-02  7.78e-02  2.51e-01  2.61e-01  3.94e-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
  245.6820   -56.5487   0.0109    37.9474  -154.3868         0.2336191     17.666 TRIG_00426438                 
 
Foreground time interval of the image:
 -0.304   0.208 (delta_t =   0.512 [sec])
Background time interval of the image:
-239.152  -0.304 (delta_t = 238.848 [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   -0.304 sec. to    0.208 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.61129     ( -0.16713   0.164235 )
Norm@50keV  : 3.00255E-02    ( -0.00294986   0.00293521 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.82 using 59 PHA bins.
# Reduced chi-squared =          1.014 for     57 degrees of freedom 
# Null hypothesis probability =   4.448277e-01
 
Photon flux (15-150 keV)    in 0.512 sec: 3.87216 ( -0.38445  0.38561 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.43599e-07 ( -1.4913e-08  1.50002e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.304 sec. to    0.208 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.05686     ( -0.618975   0.756448 )
Epeak [keV] : 87.4958      ( -25.4394 -87.4958 )
Norm@50keV  : 5.63749E-02    ( -0.0276931   0.0738906 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.73 using 59 PHA bins.
# Reduced chi-squared =         0.9951 for     56 degrees of freedom 
# Null hypothesis probability =   4.852011e-01
 
Photon flux (15-150 keV)    in 0.512 sec: 3.77111 ( -0.40166  0.40312 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39085e-07 ( -1.60069e-08  1.5986e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -0.516 sec. to    0.484 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.60697     ( -0.191008   0.187433 )
Norm@50keV  : 1.70820E-02    ( -0.00188121   0.00187159 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.36 using 59 PHA bins.
# Reduced chi-squared =         0.8836 for     57 degrees of freedom 
# Null hypothesis probability =   7.205447e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.19995 ( -0.24679  0.24781 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.59639e-07 ( -1.85705e-08  1.87056e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.516 sec. to    0.484 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.07685     ( -0.653336   0.86723 )
Epeak [keV] : 90.5219      ( -24.6063 -90.5219 )
Norm@50keV  : 3.09733E-02    ( -0.0151285   0.0488058 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.89 using 59 PHA bins.
# Reduced chi-squared =         0.8731 for     56 degrees of freedom 
# Null hypothesis probability =   7.385070e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.13962 ( -0.26064  0.26128 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54757e-07 ( -2.00035e-08  1.9974e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 0.512 sec.
Hardness ratio (energy fluence ratio) = 1.30924224703

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

S(15-50 keV)  = 5.920801e-08
S(50-150 keV) = 8.438958e-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 = -7.031799341591766E-01, IMY = 3.371067540680654E-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:
-239.152000 -0.304000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9856 -15.6407    0.2  22.7  -71.3  14.4548  52.1    0.4	Sco X-1                       
256.1461 -37.9948  185.8  18.7 -143.9   0.0139   0.1   11.8	4U 1700-377                   
256.3884 -36.4708    3.5  17.4 -141.4   0.7384   3.3    3.7	GX 349+2                      
262.9602 -24.7574    2.5   5.2 -113.1   1.0496   4.7    2.8	GX 1+4                        
264.7810 -44.5052   11.0  22.3 -168.2   0.2412   1.0    3.7	4U 1735-44                    
268.5182  -1.5344    4.2  20.8    7.2   0.6622   2.7   10.3	SW J1753.5-0127               
270.4473 -25.0528    3.4   3.5  146.9   0.7228   3.4    9.0	GX 5-1                        
270.4597 -25.6652   19.7   4.0  152.4  -0.1335  -0.6    9.7	GRS 1758-258                  
274.0443 -13.9898    4.3  10.1   41.3   0.6274   2.7    3.6	GX 17+2                       
275.9706 -30.2353    2.7  10.7  145.3   0.9081   4.2    8.2	H1820-303                     
285.0387 -24.7711   12.4  15.8  108.0  -0.2501  -0.9    9.0	HT1900.1-2455                 
288.8006  10.9255    3.3  39.0   39.4   1.7129   3.4    1.2	GRS 1915+105                  
262.9551 -33.7803    3.2  12.3 -154.2   0.8699   3.6    3.7	GX 354-0                      
295.2697 -59.1727    2.6  41.6  165.0   1.8161   4.4 ------	UNKNOWN                       
294.6409 -77.8295    3.1  56.9  179.2   6.5879   3.7 ------	UNKNOWN                       
237.8383 -41.0397    3.0  31.5 -127.8   1.1300   3.9 ------	UNKNOWN                       
211.6546 -59.6143    3.0  54.1 -143.0   5.4013   3.9 ------	UNKNOWN                       
225.0341 -15.5162    2.7  41.1  -82.5   4.2349   4.3 ------	UNKNOWN                       
222.8518 -26.0260    5.1  41.2  -98.8   2.9403   2.3 ------	UNKNOWN

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

Time interval of the image:
-0.304000 0.208000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9412 -15.7795  101.9  22.7  -71.6   0.0013   0.1    8.6	Sco X-1                       
255.8024 -37.8227   15.3  18.7 -142.9  -0.0076  -0.8    8.8	4U 1700-377                   
256.6212 -36.5738    0.0  17.3 -142.1  -0.0200  -2.0   12.7	GX 349+2                      
263.0433 -24.6725    3.6   5.1 -112.6  -0.0293  -3.2    4.8	GX 1+4                        
264.9430 -44.4853    7.8  22.3 -168.5  -0.0143  -1.5    8.8	4U 1735-44                    
268.3521  -1.4326   23.3  20.9    6.7  -0.0048  -0.5    1.5	SW J1753.5-0127               
270.2818 -25.0744  583.5   3.5  149.0   0.0002   0.0    0.3	GX 5-1                        
270.2945 -25.7669 1639.9   4.0  154.9   0.0001   0.0    1.5	GRS 1758-258                  
274.1795 -14.1653    0.0  10.0   42.5   0.0043   0.5   12.7	GX 17+2                       
275.7606 -30.2404  384.1  10.5  146.1   0.0003   0.0   11.4	H1820-303                     
285.0271 -25.0713   34.2  15.8  109.1  -0.0034  -0.3    9.1	HT1900.1-2455                 
288.9227  10.8207   21.9  39.0   39.6  -0.0110  -0.5   10.5	GRS 1915+105                  
263.1567 -33.7503    5.2  12.2 -154.9   0.0224   2.2    9.8	GX 354-0                      
292.0825 -23.3859    2.2  22.2  103.2   0.0652   5.2 ------	UNKNOWN                       
251.3974 -38.2006    2.0  21.3 -136.2   0.0565   5.6 ------	UNKNOWN                       
245.6820 -56.5487    0.7  37.9 -154.4   0.2335  17.7 ------	UNKNOWN                       
236.3561 -42.8767    2.2  33.3 -129.9   0.0707   5.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
82.148590 598.548600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.1572 -60.7041   15.4  37.3  -90.7  -1.2176  -0.7    6.7	Cen X-3                       
186.6454 -62.7690    0.6  29.3  -88.9  10.5613  18.2    0.3	GX 301-2                      
244.9823 -15.6399    0.4  40.9   36.9  27.7760  27.5    0.2	Sco X-1                       
255.8156 -37.9208    4.2  19.8   62.1   1.2657   2.7    9.3	4U 1700-377                   
256.4539 -36.5010    3.3  21.3   62.3   1.6869   3.5    4.8	GX 349+2                      
262.9239 -24.6911    5.8  34.2   66.5   2.0348   2.0    5.7	GX 1+4                        
265.0295 -44.4170    0.0  17.2   91.2  -1.4990  -3.3   12.4	4U 1735-44                    
270.2863 -25.1925  396.4  36.0   77.7  -0.0358  -0.0    6.8	GX 5-1                        
270.3056 -25.7415   14.2  35.5   78.1  -0.9507  -0.8    0.2	GRS 1758-258                  
276.1036 -30.3511    9.6  33.7   89.8   1.3727   1.2    9.3	H1820-303                     
262.9798 -33.8627    2.6  25.6   72.8   2.6409   4.3    1.7	GX 354-0                      
251.5365 -45.7081    2.6  11.4   59.0   1.6911   4.5 ------	UNKNOWN                       
  3.1058 -69.8078    2.9  45.9 -167.3   2.8182   4.0 ------	UNKNOWN                       
 29.7034 -60.5531    4.6  59.5 -161.7   8.9450   2.5 ------	UNKNOWN                       
191.3719 -23.4597    3.3  51.1  -35.1   5.8212   3.6 ------	UNKNOWN                       
182.0824 -35.1482    4.3  47.1  -53.2   5.4559   2.7 ------	UNKNOWN                       
101.2693 -73.1892    3.3  48.0 -129.0   6.5373   3.5 ------	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