GRB051117A

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: Wed Jan 22 19:34:03 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger164268
======================================================================

  Trigger: 00164268      Segment: 000

  BAT Trigger Time: 153917479.936   [s; MET]
      Trigger Stop: 153917484.032   [s; MET]
               UTC: 2005-11-17T10:51:20.091280    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 228.404931238687   Dec: 30.8698475591698  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.84
     Image Trigger?:     NO
     Rate S/N Ratio:     11.6189500386223  [ if not an image trigger ]
     Image S/N Ratio:    12.84

  Analysis Position:   [ source = BAT ]
    RA: 228.404931238687   Dec: 30.8698475591698  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 228.400735718175   Dec: 30.8644104012478  [deg; J2000]  
        { 15h 13m 36.2s , +30d 51' 51.9" }
         +/- 0.942313854386257 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.283716357903305 [arcmin] (formal 1-sigma fit error)
    SNR: 33.1117277288504
 
  Angular difference between the analysis and refined position is 0.391298 arcmin
 
  Partial Coding Fraction: 0.7265625    [ including projection effects ]

  Duration
     T90: 140.632000029087 +/- 13.5007752244694
        Measured from: -11.1159999966621
                   to: 129.516000032425     [s; relative to TRIGTIME]
     T50: 59.2200000286102 +/- 4.04570686559896
        Measured from: 11.7360000014305
                   to: 70.9560000300407     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.6240000128746     
                   to: 3.6240000128746     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -29.6559999883175     
                   to: 156.395999997854     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.646556   2.899123   1.807865   0.332827
           0.071634   0.074374   0.065790   0.058406 [error]
 Peak      0.036576   0.049305   0.016785   0.004180
           0.006132   0.006401   0.005613   0.004765 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  186.052  -29.656  156.396
T90   140.632  -11.116  129.516
T50    59.220   11.736   70.956
Peak    1.000    2.624    3.624
 
 
====== 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      -1.817    -0.066      0.066       -           -               -         2.58e-03     -9.02e-05          8.99e-05      52.230   57
CPL     -1.529    -0.261      0.278       80.377     -18.321       224.929      3.59e-03     -9.12e-04          1.33e-03      48.670   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      -2.007     -0.316     0.289       -           -               -         6.07e-03     -1.36e-03          1.33e-03      50.930   57
CPL     -0.327     -1.429     2.625       38.074     -13.215        18.595      6.42e-02     -6.42e-02          3.32e+00      46.620   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   8.26e-07  1.25e-06  1.42e-06  3.07e-06  4.42e-06  6.57e-06   erg/cm2
      90%_error_low -4.90e-08 -4.31e-08 -6.84e-08 -3.13e-07 -1.57e-07 -3.64e-07   erg/cm2
      90%_error_hi   5.01e-08  4.29e-08  6.84e-08  3.37e-07  1.57e-07  3.82e-07   erg/cm2
Peak flux       PL   4.07e-01  3.04e-01  1.51e-01  1.07e-01  9.13e-01  9.70e-01   ph/cm2/s
      90%_error_low -9.04e-02 -5.26e-02 -4.25e-02 -4.75e-02 -1.56e-01 -1.69e-01   ph/cm2/s
      90%_error_hi   9.37e-02  5.25e-02  4.42e-02  6.62e-02  1.56e-01  1.70e-01   ph/cm2/s
 
Fluence        CPL   7.82e-07  1.28e-06  1.43e-06  2.00e-06  4.30e-06  5.49e-06   erg/cm2
      90%_error_low -6.19e-08 -4.95e-08 -7.14e-08 -6.10e-07 -1.89e-07 -6.48e-07   erg/cm2
      90%_error_hi   6.31e-08  5.00e-08  7.18e-08  9.44e-07  1.89e-07  9.61e-07   erg/cm2
Peak flux      CPL   3.67e-01  3.68e-01  1.32e-01  1.34e-02  8.79e-01  8.80e-01   ph/cm2/s
      90%_error_low -1.02e-01 -7.50e-02     N/A   -1.34e-02 -1.57e-01 -1.58e-01   ph/cm2/s
      90%_error_hi   1.03e-01  8.13e-02     N/A    6.42e-02  1.57e-01  1.61e-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
  228.4007    30.8644   0.0058    29.1923  -141.9249         3.4115537     33.112 TRIG_00164268                 
 
Foreground time interval of the image:
-29.656  35.765 (delta_t =  65.421 [sec])
Background time interval of the image:
-299.936 -29.656 (delta_t = 270.280 [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  -29.656 sec. to  156.396 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.81721     ( -0.0662228   0.0656423 )
Norm@50keV  : 2.57955E-03    ( -9.01797e-05   8.98487e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.23 using 59 PHA bins.
# Reduced chi-squared =         0.9164 for     57 degrees of freedom 
# Null hypothesis probability =   6.541935e-01
 
Photon flux (15-150 keV)    in 186.1 sec: 0.357875 ( -0.012723  0.012768 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.4177e-06 ( -1.56748e-07  1.57358e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -29.656 sec. to  156.396 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.52916     ( -0.260994   0.278119 )
Epeak [keV] : 80.3767      ( -18.3211 224.929 )
Norm@50keV  : 3.59483E-03    ( -0.000912216   0.00132575 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.67 using 59 PHA bins.
# Reduced chi-squared =         0.8691 for     56 degrees of freedom 
# Null hypothesis probability =   7.459396e-01
 
Photon flux (15-150 keV)    in 186.1 sec: 0.349781 ( -0.014529  0.0146 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.29869e-06 ( -1.89117e-07  1.8904e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    2.624 sec. to    3.624 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.00733     ( -0.315697   0.288819 )
Norm@50keV  : 6.06592E-03    ( -0.00135753   0.00132629 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.93 using 59 PHA bins.
# Reduced chi-squared =         0.8935 for     57 degrees of freedom 
# Null hypothesis probability =   7.008692e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.913034 ( -0.156063  0.156066 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.5968e-08 ( -1.15591e-08  1.20071e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.624 sec. to    3.624 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.327286     ( -1.43352   2.62068 )
Epeak [keV] : 38.0739      ( -13.1939 18.6163 )
Norm@50keV  : 6.42088E-02    ( -0.0649119   3.32233 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.62 using 59 PHA bins.
# Reduced chi-squared =         0.8324 for     56 degrees of freedom 
# Null hypothesis probability =   8.099460e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.878712 ( -0.156612  0.157468 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.81415e-08 ( -1.13523e-08  1.31373e-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 = -4.398140455239909E-01, IMY = 3.445492376837285E-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:
-299.936000 -29.656000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5086  35.4043    6.7  50.5 -152.3  -0.8646  -1.7    4.5	Her X-1                       
169.6188 -22.1344    3.1  55.7   -9.3   2.4631   3.7 ------	UNKNOWN

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

Time interval of the image:
-29.656000 35.764600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4769  35.3833   10.3  50.5 -152.3   0.2500   1.1    2.6	Her X-1                       
228.4007  30.8644    0.3  29.2 -141.9   3.4116  33.1 ------	UNKNOWN                       
196.5931 -24.7475    2.4  52.7  -39.9   2.0013   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
95.964600 302.144400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4461  35.2026   14.9  22.2  167.3   0.1182   0.8    8.4	Her X-1                       
268.3722  -1.4527  129.6  49.9 -141.6   0.0500   0.1    0.3	SW J1753.5-0127               
228.4136  30.8595    0.8   0.0 -135.2   2.0353  14.1 ------	UNKNOWN                       
205.7297  10.7416    2.4  29.1  -33.4   0.8583   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