GRB130719A: 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: Sun Jan 12 00:40:06 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger562625
======================================================================

  Trigger: 00562625      Segment: 000

  BAT Trigger Time: 395905680   [s; MET]
      Trigger Stop: 395905760   [s; MET]
               UTC: 2013-07-19T05:47:49.192320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 89.0393291132065   Dec: -11.5845014417971  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.3
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    11.3

  Analysis Position:   [ source = BAT ]
    RA: 89.0393291132065   Dec: -11.5845014417971  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 89.0484478048458   Dec: -11.5803923143976  [deg; J2000]  
        { 05h 56m 11.6s , -11d 34' 49.4" }
         +/- 1.87048881574854 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.661775227819935 [arcmin] (formal 1-sigma fit error)
    SNR: 12.4340059760507
 
  Angular difference between the analysis and refined position is 0.589967 arcmin
 
  Partial Coding Fraction: 0.5078125    [ including projection effects ]

  Duration
     T90: 146.96799993515 +/- 22.6545271268104
        Measured from: 7.29199999570847
                   to: 154.259999930859     [s; relative to TRIGTIME]
     T50: 74.4959999322891 +/- 15.0009793337166
        Measured from: 35.1999999880791
                   to: 109.695999920368     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 82.6800000071526     
                   to: 83.6800000071526     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -5.40399998426437     
                   to: 158.944000005722     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.049395   1.107523   0.918858   0.208723
           0.102315   0.103486   0.089959   0.081670 [error]
 Peak      0.016330   0.030185   0.022476   0.009308
           0.007966   0.007956   0.007035   0.006328 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  164.348   -5.404  158.944
T90   146.968    7.292  154.260
T50    74.496   35.200  109.696
Peak    1.000   82.680   83.680
 
 
====== 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: N/A)
 
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      -1.676    -0.174      0.171       -           -               -         1.38e-03     -1.34e-04          1.33e-04      86.530   57
CPL     -1.673    -0.176      0.170     9999.310    -9999.300      -9999.310      1.38e-03     -4.78e-04          1.14e-03      86.530   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      -1.348     -0.528     0.550       -           -               -         5.02e-03     -1.60e-03          1.60e-03      70.200   57
CPL     -0.052     -2.212     3.869       79.107      N/A           N/A         2.10e-02        N/A               N/A         69.200   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   3.41e-07  5.62e-07  7.03e-07  1.75e-06  2.10e-06  3.36e-06   erg/cm2
      90%_error_low -5.29e-08 -5.37e-08 -9.24e-08 -4.47e-07 -2.15e-07 -5.29e-07   erg/cm2
      90%_error_hi   5.51e-08  5.33e-08  9.18e-08  5.41e-07  2.17e-07  6.02e-07   erg/cm2
Peak flux       PL   1.79e-01  1.97e-01  1.55e-01  2.00e-01  6.05e-01  7.31e-01   ph/cm2/s
      90%_error_low -9.35e-02 -7.36e-02 -5.64e-02 -1.16e-01 -2.01e-01 -2.33e-01   ph/cm2/s
      90%_error_hi   1.13e-01  7.18e-02  5.55e-02  1.86e-01  2.04e-01  2.36e-01   ph/cm2/s
 
Fluence        CPL   3.43e-07  5.59e-07  7.01e-07  1.82e-06  2.10e-06  3.30e-06   erg/cm2
      90%_error_low -6.28e-08 -5.30e-08 -9.63e-08 -1.05e-06 -2.42e-07 -9.39e-07   erg/cm2
      90%_error_hi   5.62e-08  6.73e-08  1.01e-07  2.18e-07  2.26e-07  6.29e-07   erg/cm2
Peak flux      CPL   1.35e-01  2.15e-01  1.73e-01  6.88e-02  5.73e-01  5.93e-01   ph/cm2/s
      90%_error_low -1.03e-01 -8.65e-02 -6.73e-02 -6.88e-02 -2.07e-01 -2.23e-01   ph/cm2/s
      90%_error_hi   1.33e-01  9.10e-02  7.13e-02  1.90e-01  2.11e-01  2.88e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   89.0484   -11.5804   0.0156    39.8236  -145.3169         3.1641407     12.434 TRIG_00562625                 
 
Foreground time interval of the image:
 -5.404 158.944 (delta_t = 164.348 [sec])
Background time interval of the image:
-239.000  -5.404 (delta_t = 233.596 [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   -5.404 sec. to  158.944 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67634     ( -0.173791   0.170767 )
Norm@50keV  : 1.37546E-03    ( -0.000134434   0.000133002 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          86.53 using 59 PHA bins.
# Reduced chi-squared =          1.518 for     57 degrees of freedom 
# Null hypothesis probability =   7.045526e-03
 
Photon flux (15-150 keV)    in 164.3 sec: 0.181200 ( -0.017275  0.01733 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.09694e-06 ( -2.15083e-07  2.17024e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -5.404 sec. to  158.944 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67316     ( -0.175044   0.171076 )
Epeak [keV] : 9999.31      ( -9999.35 -9999.36 )
Norm@50keV  : 1.37788E-03    ( -0.000478427   0.00114361 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          86.53 using 59 PHA bins.
# Reduced chi-squared =          1.545 for     56 degrees of freedom 
# Null hypothesis probability =   5.494539e-03
 
Photon flux (15-150 keV)    in 164.3 sec: 0.181809 ( -0.019387  0.017988 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.10449e-06 ( -2.41766e-07  2.25577e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   82.680 sec. to   83.680 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.34828     ( -0.528306   0.55013 )
Norm@50keV  : 5.02284E-03    ( -0.0016004   0.00160039 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.20 using 59 PHA bins.
# Reduced chi-squared =          1.232 for     57 degrees of freedom 
# Null hypothesis probability =   1.125036e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.604911 ( -0.201245  0.204071 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.90806e-08 ( -1.64722e-08  1.67503e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   82.680 sec. to   83.680 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.0521886     ( -2.21152   3.86852 )
Epeak [keV] : 79.1068      (   )
Norm@50keV  : 2.09816E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.20 using 59 PHA bins.
# Reduced chi-squared =          1.236 for     56 degrees of freedom 
# Null hypothesis probability =   1.107717e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.572856 ( -0.20674  0.211352 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.5589e-08 ( -1.71948e-08  1.78988e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = N/A

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

S(15-50 keV)  = N/A
S(50-150 keV) = N/A

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 = -6.856984283138230E-01, IMY = 4.745011769304377E-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:
-239.000000 -5.404000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5465 -40.5512    0.3  14.2   84.6   8.0081  39.7    0.8	Vela X-1                      
181.7327  -7.9914    2.2  54.4    8.0   5.4168   5.2 ------	UNKNOWN                       
 76.8963 -36.5484    2.4  43.6  173.6   1.7391   4.8 ------	UNKNOWN                       
112.4135 -13.5958    3.1  20.3 -120.2   0.7558   3.7 ------	UNKNOWN                       
116.3365 -12.4579    3.0  18.8 -109.1   0.7503   3.9 ------	UNKNOWN                       
147.1101   5.8182    2.5  38.3  -39.6   1.3350   4.7 ------	UNKNOWN                       

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

Time interval of the image:
-5.404000 158.944000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5360 -40.7153   10.8  14.4   84.9   0.1977   1.1    9.6	Vela X-1                      
 89.0485 -11.5804    0.9  39.8 -145.3   3.1641  12.4 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
849.100590 963.120600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4798  35.3942    6.4  22.3  118.2   0.2564   1.8    3.3	Her X-1                       
299.5747  35.2083    0.7  39.0   49.0   5.9219  16.7    0.9	Cyg X-1                       
308.1395  40.9241    6.1  39.3   34.9  -0.5576  -1.9    2.2	Cyg X-3                       
325.9138  38.2673    9.7  50.7   23.5  -0.7756  -1.2   12.6	Cyg X-2                       
 23.3167  65.2233    2.4  52.0  -31.5   1.7543   4.8 ------	UNKNOWN                       
 28.5720  63.6625    3.7  54.5  -33.1   1.7170   3.1 ------	UNKNOWN