GRB140703A: Summary Image Light curves Spectra Distribution Others

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: Sat Oct  4 21:46:50 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger603243
======================================================================

  Trigger: 00603243      Segment: 000

  BAT Trigger Time: 426040649.28   [s; MET]
      Trigger Stop: 426040651.328   [s; MET]
               UTC: 2014-07-03T00:37:17.064400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 12.9899510964298   Dec: 45.0946269766034  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.54
     Image Trigger?:     NO
     Rate S/N Ratio:     17.8605710994918  [ if not an image trigger ]
     Image S/N Ratio:    7.54

  Analysis Position:   [ source = BAT ]
    RA: 12.9899510964298   Dec: 45.0946269766034  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 13.0103298080613   Dec: 45.1024824452511  [deg; J2000]  
        { 00h 52m 02.5s , +45d 06' 08.9" }
         +/- 1.61301136686808 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.547379046242965 [arcmin] (formal 1-sigma fit error)
    SNR: 15.363617387165
 
  Angular difference between the analysis and refined position is 0.983414 arcmin
 
  Partial Coding Fraction: 0.140625    [ including projection effects ]

  Duration
     T90: 68.6439999341965 +/- 66.4564438771345
        Measured from: -0.0679999589920044
                   to: 68.5759999752045     [s; relative to TRIGTIME]
     T50: 25.1279999017715 +/- 9.05243940683085
        Measured from: 2.5560000538826
                   to: 27.6839999556541     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.360000014305115     
                   to: 1.36000001430511     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.52399998903275     
                   to: 135.016000032425     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.575246   2.198619   1.544273   0.599340
           0.139049   0.145924   0.126927   0.106545 [error]
 Peak      0.050134   0.119050   0.133837   0.086241
           0.019253   0.021934   0.020455   0.017414 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  137.540   -2.524  135.016
T90    68.644   -0.068   68.576
T50    25.128    2.556   27.684
Peak    1.000    0.360    1.360
 
 
====== 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      -1.699    -0.131      0.130       -           -               -         3.05e-03     -2.30e-04          2.29e-04      41.190   57
CPL     -1.702    -0.128      0.135     9998.990    -9998.980      -9998.990      3.04e-03     -3.04e-03          2.09e-03      41.200   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      -1.171     -0.316     0.335       -           -               -         2.37e-02     -4.84e-03          4.77e-03      68.470   57
CPL     -0.519     -0.907     1.763      137.886    -137.886      -137.886      4.48e-02     -2.50e-02          1.84e-01      67.730   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   6.45e-07  1.05e-06  1.29e-06  3.14e-06  3.88e-06  6.13e-06   erg/cm2
      90%_error_low -8.00e-08 -8.08e-08 -1.27e-07 -6.13e-07 -3.04e-07 -7.23e-07   erg/cm2
      90%_error_hi   8.29e-08  8.04e-08  1.26e-07  7.03e-07  3.05e-07  7.88e-07   erg/cm2
Peak flux       PL   7.11e-01  8.70e-01  7.73e-01  1.18e+00  2.77e+00  3.54e+00   ph/cm2/s
      90%_error_low -2.68e-01 -2.27e-01 -1.56e-01 -4.27e-01 -5.98e-01 -6.91e-01   ph/cm2/s
      90%_error_hi   3.12e-01  2.23e-01  1.55e-01  5.45e-01  6.06e-01  6.93e-01   ph/cm2/s
 
Fluence        CPL   6.46e-07  1.05e-06  1.29e-06  3.18e-06  3.88e-06  6.21e-06   erg/cm2
      90%_error_low -5.08e-08 -7.99e-08 -1.29e-07 -1.63e-06 -3.14e-07 -1.71e-06   erg/cm2
      90%_error_hi   8.23e-08  9.50e-08  1.40e-07  7.02e-07  3.04e-07  3.67e-07   erg/cm2
Peak flux      CPL   5.88e-01  8.93e-01  8.47e-01  7.25e-01  2.70e+00  3.05e+00   ph/cm2/s
      90%_error_low -3.23e-01 -2.46e-01 -2.00e-01 -4.55e-01 -6.05e-01 -8.06e-01   ph/cm2/s
      90%_error_hi   3.86e-01  2.48e-01  2.21e-01  6.50e-01  6.17e-01  9.24e-01   ph/cm2/s
 
======================================================================

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   13.0103    45.1025   0.0125    54.6259  -169.2392         3.6912900     15.364 TRIG_00603243                 
 
Foreground time interval of the image:
 -2.524  30.621 (delta_t =  33.145 [sec])
Background time interval of the image:
-149.379  -2.524 (delta_t = 146.855 [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

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   -2.524 sec. to  135.016 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.69945     ( -0.131122   0.129646 )
Norm@50keV  : 3.04681E-03    ( -0.000230057   0.000228928 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.19 using 59 PHA bins.
# Reduced chi-squared =         0.7227 for     57 degrees of freedom 
# Null hypothesis probability =   9.430642e-01
 
Photon flux (15-150 keV)    in 137.5 sec: 0.404590 ( -0.03129  0.03141 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.87956e-06 ( -3.03684e-07  3.05218e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -2.524 sec. to  135.016 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.70203     ( -0.129643   0.133095 )
Epeak [keV] : 9998.99      ( -9999.34 -9999.35 )
Norm@50keV  : 3.03892E-03    ( -0.00305086   0.00207459 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.20 using 59 PHA bins.
# Reduced chi-squared =         0.7358 for     56 degrees of freedom 
# Null hypothesis probability =   9.305843e-01
 
Photon flux (15-150 keV)    in 137.5 sec: 0.404855 ( -0.03226  0.030523 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.88233e-06 ( -3.14262e-07  3.04382e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    0.360 sec. to    1.360 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.17099     ( -0.316421   0.334503 )
Norm@50keV  : 2.36579E-02    ( -0.0048432   0.00477486 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.47 using 59 PHA bins.
# Reduced chi-squared =          1.201 for     57 degrees of freedom 
# Null hypothesis probability =   1.420289e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.76616 ( -0.59791  0.60628 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.42058e-07 ( -4.79024e-08  4.791e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.360 sec. to    1.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.518898     ( -0.907304   1.76325 )
Epeak [keV] : 137.886      ( -137.886 -137.886 )
Norm@50keV  : 4.48380E-02    ( -0.0250289   0.183751 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.73 using 59 PHA bins.
# Reduced chi-squared =          1.210 for     56 degrees of freedom 
# Null hypothesis probability =   1.352996e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.70254 ( -0.60544  0.61744 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.4016e-07 ( -4.86551e-08  4.86286e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 68.644 sec.
Hardness ratio (energy fluence ratio) = 1.23162924387

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

S(15-50 keV)  = 1.6952261e-06
S(50-150 keV) = 2.1843653e-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 = -1.383715046351633E+00, IMY = 2.629757897240920E-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:
-149.379370 -2.524000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
355.5494 -15.7553    2.8  39.9  102.0   2.2986   4.1 ------	UNKNOWN                       
359.2587 -25.0649    2.7  39.2   86.4   2.6188   4.3 ------	UNKNOWN                       
 70.0738 -44.7552    3.1  49.5   -2.9   1.0889   3.7 ------	UNKNOWN                       
 40.7508  29.4266    2.8  35.7 -141.7   0.8128   4.1 ------	UNKNOWN                       
 82.2878  -9.2573    2.2  47.0  -53.2   3.4033   5.3 ------	UNKNOWN                       

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

Time interval of the image:
-2.524000 30.620600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
357.8692  21.5348    1.9  45.5  157.8   1.0152   6.0 ------	UNKNOWN                       
 31.0893 -25.7085    2.3  20.2   39.8   0.3617   5.0 ------	UNKNOWN                       
 13.0103  45.1025    0.7  54.6 -169.2   3.6905  15.4 ------	UNKNOWN                       
 25.5362  49.1599    2.1  55.6 -157.8   1.6618   5.6 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
102.020580 239.820600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.2722  38.3582    5.2  35.0  112.0   0.7283   2.2    5.2	Cyg X-2                       
 25.1117  11.6785    2.7  35.0   -4.8   0.7306   4.2 ------	UNKNOWN                       
199.4342  75.7083    2.3  59.1 -165.6   4.6733   5.0 ------	UNKNOWN                       
177.1140  75.7395    3.9  58.7 -159.3   2.7856   3.0 ------	UNKNOWN                       
 58.5698  25.0716    2.0  41.6  -60.8   2.5092   5.9 ------	UNKNOWN                       
 81.9087  55.9735    2.3  43.2 -114.1   2.7949   5.0 ------	UNKNOWN                       
 57.0001  12.2591    2.6  49.7  -46.7   2.7451   4.5 ------	UNKNOWN