GRB051117B

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 19:30:49 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger164279
======================================================================

  Trigger: 00164279      Segment: 000

  BAT Trigger Time: 153926574.272   [s; MET]
      Trigger Stop: 153926579.776   [s; MET]
               UTC: 2005-11-17T13:22:54.427080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 85.2253223997025   Dec: -19.2449527944692  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.47
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8452325786651  [ if not an image trigger ]
     Image S/N Ratio:    6.47

  Analysis Position:   [ source = BAT ]
    RA: 85.2253223997025   Dec: -19.2449527944692  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 85.2100145209269   Dec: -19.2840579216085  [deg; J2000]  
        { 05h 40m 50.4s , -19d 17' 02.6" }
         +/- 2.46505516627168 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.22983849847636 [arcmin] (formal 1-sigma fit error)
    SNR: 8.38235467757771
 
  Angular difference between the analysis and refined position is 2.501384 arcmin
 
  Partial Coding Fraction: 0.71875    [ including projection effects ]

  Duration
     T90: 9.02000001072884 +/- 1.31508175906147
        Measured from: 1.51599997282028
                   to: 10.5359999835491     [s; relative to TRIGTIME]
     T50: 4.83599999547005 +/- 2.50364615854103
        Measured from: 2.64399999380112
                   to: 7.47999998927116     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.43999999761581     
                   to: 2.43999999761581     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 1.38799998164177     
                   to: 10.9959999918938     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.070222   0.110627   0.095085   0.015652
           0.017332   0.018047   0.016099   0.013849 [error]
 Peak      0.016709   0.020447   0.020709   0.004442
           0.005675   0.005964   0.005400   0.004660 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    9.608    1.388   10.996
T90     9.020    1.516   10.536
T50     4.836    2.644    7.480
Peak    1.000    1.440    2.440
 
 
====== 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      -1.544    -0.308      0.299       -           -               -         1.93e-03     -3.74e-04          3.69e-04      79.510   57
CPL     -0.535    -1.111      1.475       70.830     -21.132       -70.830      6.40e-03     -6.40e-03          2.85e-02      77.150   56
 
 
=== 1-s peak 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      -1.508     -0.455     0.433       -           -               -         4.02e-03     -1.17e-03          1.15e-03      87.710   57
CPL      1.183     -2.350    -1.183       60.610     -14.145        63.198      8.10e-02     -8.10e-02          9.87e+02      83.710   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   2.47e-08  4.42e-08  6.06e-08  1.72e-07  1.75e-07  3.02e-07   erg/cm2
      90%_error_low -6.75e-09 -8.19e-09 -1.51e-08 -7.38e-08 -3.62e-08 -9.02e-08   erg/cm2
      90%_error_hi   7.20e-09  8.15e-09  1.51e-08  1.03e-07  3.71e-08  1.14e-07   erg/cm2
Peak flux       PL   1.67e-01  1.67e-01  1.17e-01  1.31e-01  5.03e-01  5.82e-01   ph/cm2/s
      90%_error_low -6.73e-02 -4.83e-02 -4.15e-02 -7.22e-02 -1.40e-01 -1.64e-01   ph/cm2/s
      90%_error_hi   7.55e-02  4.78e-02  4.14e-02  1.08e-01  1.41e-01  1.67e-01   ph/cm2/s
 
Fluence        CPL   2.12e-08  4.93e-08  6.39e-08  4.90e-08  1.64e-07  1.83e-07   erg/cm2
      90%_error_low -8.02e-09 -1.01e-08 -1.75e-08 -3.67e-08 -3.70e-08 -5.30e-08   erg/cm2
      90%_error_hi   8.25e-09  1.06e-08  1.76e-08  1.55e-07  3.89e-08  1.56e-07   erg/cm2
Peak flux      CPL   8.78e-02  1.99e-01  1.44e-01  2.04e-02  4.49e-01  4.52e-01   ph/cm2/s
      90%_error_low -8.78e-02 -9.43e-02 -5.43e-02 -2.04e-02 -1.96e-01 -1.98e-01   ph/cm2/s
      90%_error_hi   1.04e-01  6.51e-02  5.97e-02  8.04e-02  1.53e-01  1.63e-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
   85.2100   -19.2841   0.0230    29.6625   166.3031         0.2972575      8.382 TRIG_00164279                 
 
Foreground time interval of the image:
  1.388  10.996 (delta_t =   9.608 [sec])
Background time interval of the image:
-141.371   1.388 (delta_t = 142.759 [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    1.388 sec. to   10.996 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.54418     ( -0.308104   0.298578 )
Norm@50keV  : 1.93043E-03    ( -0.000373888   0.000368562 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.51 using 59 PHA bins.
# Reduced chi-squared =          1.395 for     57 degrees of freedom 
# Null hypothesis probability =   2.609332e-02
 
Photon flux (15-150 keV)    in 9.608 sec: 0.243979 ( -0.044625  0.044673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.74776e-07 ( -3.62465e-08  3.70516e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.388 sec. to   10.996 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.535428     ( -1.10946   1.47587 )
Epeak [keV] : 70.8304      ( -21.1614 -70.8599 )
Norm@50keV  : 6.40147E-03    ( -0.00639359   0.0284932 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.15 using 59 PHA bins.
# Reduced chi-squared =          1.378 for     56 degrees of freedom 
# Null hypothesis probability =   3.201037e-02
 
Photon flux (15-150 keV)    in 9.608 sec: 0.235621 ( -0.045505  0.045589 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.63532e-07 ( -3.69876e-08  3.88551e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    1.440 sec. to    2.440 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.50821     ( -0.455726   0.432223 )
Norm@50keV  : 4.02066E-03    ( -0.00117095   0.00115388 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          87.71 using 59 PHA bins.
# Reduced chi-squared =          1.539 for     57 degrees of freedom 
# Null hypothesis probability =   5.562921e-03
 
Photon flux (15-150 keV)    in 1 sec: 0.503057 ( -0.140247  0.140581 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.80996e-08 ( -1.17678e-08  1.21404e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.440 sec. to    2.440 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18268     ( -2.5048   -1.33738 )
Epeak [keV] : 60.6096      ( -13.5889 63.7545 )
Norm@50keV  : 8.09564E-02    ( -0.104353   987.012 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          83.71 using 59 PHA bins.
# Reduced chi-squared =          1.495 for     56 degrees of freedom 
# Null hypothesis probability =   9.631324e-03
 
Photon flux (15-150 keV)    in 1 sec: 0.449386 ( -0.195661  0.153279 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.35606e-08 ( -1.27459e-08  1.23159e-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 = -5.533267425423501E-01, IMY = -1.348543697746188E-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:
-141.371400 1.388000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 47.9142 -16.0995    3.1  10.4   48.5   0.4014   3.7 ------	UNKNOWN                       
 95.6872 -36.1230    2.7  37.5 -161.5   0.6706   4.3 ------	UNKNOWN                       
 70.2105 -66.0657    2.1  42.4 -108.9   2.7037   5.6 ------	UNKNOWN

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

Time interval of the image:
1.388000 10.996000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 85.2100 -19.2841    1.4  29.7  166.3   0.2973   8.4 ------	UNKNOWN                       
  7.0571 -34.8003    3.1  41.2  -34.1   0.1699   3.8 ------	UNKNOWN                       
 91.5165 -52.8693    2.4  39.7 -134.4   0.2396   4.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
117.828600 302.807600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6330  22.0084    0.7  41.3  129.2   8.0452  16.2    0.4	Crab                          
 98.7521  25.3763    3.0  46.5  148.4   1.9132   3.9 ------	UNKNOWN                       
131.7441 -24.9435    2.5  43.3 -122.3   2.2039   4.6 ------	UNKNOWN                       
132.9312 -25.9287    2.5  44.3 -120.8   2.7357   4.6 ------	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