GRB100513A: 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: Fri Jan 17 18:34:41 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger421814
======================================================================

  Trigger: 00421814      Segment: 000

  BAT Trigger Time: 295409234.56   [s; MET]
      Trigger Stop: 295409246.72   [s; MET]
               UTC: 2010-05-13T02:07:08.767460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 169.57995036142   Dec: 3.60539838785235  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.4
     Image Trigger?:     NO
     Rate S/N Ratio:     10.8627804912002  [ if not an image trigger ]
     Image S/N Ratio:    10.4

  Analysis Position:   [ source = BAT ]
    RA: 169.57995036142   Dec: 3.60539838785235  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 169.600224047669   Dec: 3.61051874761748  [deg; J2000]  
        { 11h 18m 24.1s , +03d 36' 37.9" }
         +/- 1.41272831147476 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.598341943168445 [arcmin] (formal 1-sigma fit error)
    SNR: 18.5673054459798
 
  Angular difference between the analysis and refined position is 1.252280 arcmin
 
  Partial Coding Fraction: 0.90625    [ including projection effects ]

  Duration
     T90: 83.4959999918938 +/- 21.628383198402
        Measured from: -39.7760000228882
                   to: 43.7199999690056     [s; relative to TRIGTIME]
     T50: 30.9839999079704 +/- 5.79226104674092
        Measured from: -5.0799999833107
                   to: 25.9039999246597     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.08799999952316     
                   to: 2.08799999952316     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -52.6399999856949     
                   to: 52.3439999818802     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.697106   0.922721   0.573996   0.110267
           0.056904   0.059199   0.052661   0.046913 [error]
 Peak      0.013423   0.032317   0.019297   0.007468
           0.005810   0.006253   0.005431   0.004681 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  104.984  -52.640   52.344
T90    83.496  -39.776   43.720
T50    30.984   -5.080   25.904
Peak    1.000    1.088    2.088
 
 
====== 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      -1.593    -0.135      0.134       -           -               -         1.45e-03     -1.15e-04          1.14e-04      48.190   57
CPL     -1.524    -0.605      0.557      321.393    -321.393      -321.393      1.58e-03     -4.70e-04          1.52e-03      48.150   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      -1.286     -0.426     0.442       -           -               -         4.81e-03     -1.17e-03          1.16e-03      45.280   57
CPL     -1.290     -0.421     0.452     9999.360    -9999.360      -9999.360      4.82e-03     -1.16e-03          3.84e-02      45.280   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   2.13e-07  3.69e-07  4.90e-07  1.33e-06  1.43e-06  2.40e-06   erg/cm2
      90%_error_low -2.57e-08 -2.79e-08 -5.18e-08 -2.74e-07 -1.22e-07 -3.22e-07   erg/cm2
      90%_error_hi   2.65e-08  2.78e-08  5.18e-08  3.21e-07  1.23e-07  3.59e-07   erg/cm2
Peak flux       PL   1.61e-01  1.84e-01  1.51e-01  2.07e-01  5.72e-01  7.04e-01   ph/cm2/s
      90%_error_low -6.80e-02 -5.18e-02 -4.44e-02 -1.03e-01 -1.41e-01 -1.76e-01   ph/cm2/s
      90%_error_hi   7.62e-02  4.98e-02  4.33e-02  1.56e-01  1.42e-01  1.82e-01   ph/cm2/s
 
Fluence        CPL   2.11e-07  3.72e-07  4.91e-07  1.18e-06  1.42e-06  2.25e-06   erg/cm2
      90%_error_low -2.94e-08 -3.04e-08 -5.22e-08 -6.95e-07 -1.44e-07 -7.08e-07   erg/cm2
      90%_error_hi   2.13e-08  3.63e-08  5.32e-08  2.05e-07  1.31e-07  2.47e-07   erg/cm2
Peak flux      CPL   1.65e-01  1.84e-01  1.50e-01  2.06e-01  5.73e-01  7.12e-01   ph/cm2/s
      90%_error_low -7.84e-02 -5.14e-02 -4.11e-02     N/A   -1.43e-01 -2.53e-01   ph/cm2/s
      90%_error_hi   5.80e-02  6.10e-02  4.90e-02     N/A    1.42e-01  1.61e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  169.6002     3.6105   0.0104    23.9831   174.1641         2.5082680     18.567 TRIG_00421814                 
 
Foreground time interval of the image:
-52.640  52.344 (delta_t = 104.984 [sec])
Background time interval of the image:
-239.560 -52.640 (delta_t = 186.920 [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  -52.640 sec. to   52.344 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.5929     ( -0.135252   0.133728 )
Norm@50keV  : 1.45426E-03    ( -0.000114684   0.00011373 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.19 using 59 PHA bins.
# Reduced chi-squared =         0.8454 for     57 degrees of freedom 
# Null hypothesis probability =   7.906150e-01
 
Photon flux (15-150 keV)    in 105 sec: 0.186476 ( -0.013945  0.013956 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.42948e-06 ( -1.21807e-07  1.2319e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -52.640 sec. to   52.344 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.52445     ( -0.602214   0.560142 )
Epeak [keV] : 321.393      ( -342.01 -342.01 )
Norm@50keV  : 1.58234E-03    ( -0.000462088   0.00152921 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.15 using 59 PHA bins.
# Reduced chi-squared =         0.8598 for     56 degrees of freedom 
# Null hypothesis probability =   7.630422e-01
 
Photon flux (15-150 keV)    in 105 sec: 0.185918 ( -0.014202  0.014386 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.41997e-06 ( -1.44412e-07  1.30595e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    1.088 sec. to    2.088 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.2861     ( -0.425729   0.442331 )
Norm@50keV  : 4.80599E-03    ( -0.00116625   0.00116389 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.28 using 59 PHA bins.
# Reduced chi-squared =         0.7944 for     57 degrees of freedom 
# Null hypothesis probability =   8.686543e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.571930 ( -0.141391  0.141859 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.76607e-08 ( -1.28133e-08  1.30577e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    1.088 sec. to    2.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.28961     ( -0.423629   0.449863 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 4.81748E-03    ( -0.00116782   0.0384 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.28 using 59 PHA bins.
# Reduced chi-squared =         0.8086 for     56 degrees of freedom 
# Null hypothesis probability =   8.465600e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.572769 ( -0.143175  0.141778 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.77749e-08 ( -1.42945e-08  1.09078e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 83.496 sec.
Hardness ratio (energy fluence ratio) = 1.32604996791

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

S(15-50 keV)  = 5.821301e-07
S(50-150 keV) = 8.473669e-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 = -4.425686930936857E-01, IMY = -4.523435147514752E-02

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:
-239.560000 -52.640000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
221.8721   0.4046    2.1  40.6   66.0   3.2698   5.6 ------	UNKNOWN                       
147.5331 -17.2988    3.9  54.1  177.0   1.7948   3.0 ------	UNKNOWN                       
170.9045   5.6650    2.8  21.6  175.2   0.6131   4.1 ------	UNKNOWN                       
155.0813  -1.9877    2.6  38.4 -174.0   0.9323   4.5 ------	UNKNOWN                       
164.7606  48.9224    3.1  32.4  -77.0   1.0448   3.7 ------	UNKNOWN                       
175.1054  66.8567    3.0  46.0  -56.4   2.7832   3.9 ------	UNKNOWN                       

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

Time interval of the image:
-52.640000 52.344000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
175.0736 -15.5548    2.2  38.5  147.0   1.2251   5.3 ------	UNKNOWN                       
169.6002   3.6105    0.6  24.0  174.2   2.5081  18.6 ------	UNKNOWN                       
193.1372  51.0997    2.4  30.2  -41.7   0.7352   4.8 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
110.340600 962.483800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5288 -40.5540  182.6  54.0 -170.7   0.1095   0.1    0.0	Vela X-1                      
214.7585  17.1113    2.7  46.3   47.3  10.6284   4.4 ------	UNKNOWN                       
206.0027  24.7255    2.6  40.9   33.0   4.1242   4.5 ------	UNKNOWN                       
146.4213 -46.4508    4.3  54.1  177.1   6.0632   2.7 ------	UNKNOWN