GRB101117B: 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 15:12:45 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger438675
======================================================================

  Trigger: 00438675      Segment: 000

  BAT Trigger Time: 311714010.304   [s; MET]
      Trigger Stop: 311714010.56   [s; MET]
               UTC: 2010-11-17T19:13:23.925160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 172.909464171776   Dec: -72.6617234768991  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.66
     Image Trigger?:     NO
     Rate S/N Ratio:     16.3707055437449  [ if not an image trigger ]
     Image S/N Ratio:    7.66

  Analysis Position:   [ source = BAT ]
    RA: 172.909464171776   Dec: -72.6617234768991  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 172.989864966364   Dec: -72.651910241227  [deg; J2000]  
        { 11h 31m 57.6s , -72d 39' 06.9" }
         +/- 1.02687639281878 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.398901659288669 [arcmin] (formal 1-sigma fit error)
    SNR: 29.2862558169998
 
  Angular difference between the analysis and refined position is 1.553893 arcmin
 
  Partial Coding Fraction: 0.4648438    [ including projection effects ]

  Duration
     T90: 5.17199999094009 +/- 1.69158382587503
        Measured from: 0.187999963760376
                   to: 5.35999995470047     [s; relative to TRIGTIME]
     T50: 1.89199995994568 +/- 0.161245134265442
        Measured from: 0.983999967575073
                   to: 2.87599992752075     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.73199999332428     
                   to: 1.73199999332428     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0960000157356262     
                   to: 8.18000000715256     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.471476   0.603118   0.529034   0.101032
           0.026864   0.029013   0.025825   0.020776 [error]
 Peak      0.138641   0.193388   0.173363   0.038540
           0.011091   0.012209   0.011308   0.007803 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    8.276   -0.096    8.180
T90     5.172    0.188    5.360
T50     1.892    0.984    2.876
Peak    1.000    0.732    1.732
 
 
====== 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      -1.500    -0.092      0.091       -           -               -         1.40e-02     -7.23e-04          7.21e-04      39.510   57
CPL     -1.089    -0.360      0.391      116.988     -33.374       356.581      2.20e-02     -7.06e-03          1.15e-02      35.660   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      -1.476     -0.117     0.116       -           -               -         3.60e-02     -2.47e-03          2.47e-03      56.370   57
CPL     -1.102     -0.418     0.483      126.430     -44.493      -126.430      5.47e-02     -1.98e-02          3.77e-02      54.260   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   1.48e-07  2.71e-07  3.83e-07  1.14e-06  1.10e-06  1.94e-06   erg/cm2
      90%_error_low -1.33e-08 -1.49e-08 -2.54e-08 -1.57e-07 -6.15e-08 -1.76e-07   erg/cm2
      90%_error_hi   1.37e-08  1.49e-08  2.53e-08  1.73e-07  6.18e-08  1.89e-07   erg/cm2
Peak flux       PL   1.45e+00  1.48e+00  1.06e+00  1.22e+00  4.46e+00  5.20e+00   ph/cm2/s
      90%_error_low -1.67e-01 -1.08e-01 -9.08e-02 -2.01e-01 -3.07e-01 -3.56e-01   ph/cm2/s
      90%_error_hi   1.73e-01  1.07e-01  9.00e-02  2.23e-01  3.08e-01  3.57e-01   ph/cm2/s
 
Fluence        CPL   1.36e-07  2.81e-07  3.96e-07  6.59e-07  1.07e-06  1.47e-06   erg/cm2
      90%_error_low -1.67e-08 -1.71e-08 -2.83e-08 -2.35e-07 -6.66e-08 -2.42e-07   erg/cm2
      90%_error_hi   1.70e-08  1.74e-08  2.87e-08  4.02e-07  6.66e-08  4.00e-07   erg/cm2
Peak flux      CPL   1.34e+00  1.52e+00  1.10e+00  8.29e-01  4.39e+00  4.80e+00   ph/cm2/s
      90%_error_low -2.06e-01 -1.22e-01 -1.04e-01 -2.97e-01 -3.18e-01 -4.53e-01   ph/cm2/s
      90%_error_hi   2.10e-01  1.24e-01  1.06e-01  6.16e-01  3.18e-01  5.70e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  172.9899   -72.6519   0.0066    31.4698  -112.2128         1.8039559     29.286 TRIG_00438675                 
 
Foreground time interval of the image:
 -0.096   8.180 (delta_t =   8.276 [sec])
Background time interval of the image:
-643.903 -554.180 (delta_t =  89.723 [sec])
-239.304  -0.096 (delta_t = 239.208 [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   -0.096 sec. to    8.180 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.49994     ( -0.0915118   0.0910006 )
Norm@50keV  : 1.39624E-02    ( -0.000722956   0.000721074 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.51 using 59 PHA bins.
# Reduced chi-squared =         0.6931 for     57 degrees of freedom 
# Null hypothesis probability =   9.624881e-01
 
Photon flux (15-150 keV)    in 8.276 sec: 1.74307 ( -0.09261  0.09278 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.09633e-06 ( -6.14726e-08  6.17818e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.096 sec. to    8.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.08906     ( -0.359775   0.391432 )
Epeak [keV] : 116.988      ( -33.3735 356.581 )
Norm@50keV  : 2.19944E-02    ( -0.00706381   0.0114754 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.66 using 59 PHA bins.
# Reduced chi-squared =         0.6368 for     56 degrees of freedom 
# Null hypothesis probability =   9.844578e-01
 
Photon flux (15-150 keV)    in 8.276 sec: 1.70417 ( -0.09851  0.09854 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.06822e-06 ( -6.66253e-08  6.65866e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    0.732 sec. to    1.732 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.47565     ( -0.116938   0.115662 )
Norm@50keV  : 3.59546E-02    ( -0.0024732   0.00246602 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.37 using 59 PHA bins.
# Reduced chi-squared =         0.9889 for     57 degrees of freedom 
# Null hypothesis probability =   4.987780e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.45991 ( -0.30744  0.30777 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.42531e-07 ( -2.5764e-08  2.59117e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.732 sec. to    1.732 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.10248     ( -0.417849   0.483222 )
Epeak [keV] : 126.430      ( -44.4931 -126.43 )
Norm@50keV  : 5.46663E-02    ( -0.0197909   0.0377389 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.26 using 59 PHA bins.
# Reduced chi-squared =         0.9690 for     56 degrees of freedom 
# Null hypothesis probability =   5.408139e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.39124 ( -0.31789  0.31787 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.35769e-07 ( -2.72372e-08  2.72255e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 5.172 sec.
Hardness ratio (energy fluence ratio) = 1.41432741442

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

S(15-50 keV)  = 4.18663e-07
S(50-150 keV) = 6.77684e-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 = -2.313940055512647E-01, IMY = 5.666523132785843E-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:
-643.903400 -554.180200
-239.304000 -0.096000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5001 -40.5438    1.5  42.5 -173.1   3.0171   7.6    1.5	Vela X-1                      
169.9362 -60.5096    0.0  39.4 -128.4  -0.6772  -1.5   13.1	Cen X-3                       
186.4766 -62.7706    2.1  42.2 -116.7   4.6946   5.6    4.9	GX 301-2                      
 81.7996 -25.6895    2.4  40.9  113.9   4.5988   4.9 ------	UNKNOWN                       
334.8218 -43.0167    2.9  54.5  -15.2   3.0723   4.0 ------	UNKNOWN                       

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

Time interval of the image:
-0.096000 8.180000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4765 -40.7024    8.4  42.4 -173.0  -0.0766  -1.4    9.2	Vela X-1                      
169.9441 -60.5208    4.2  39.4 -128.4   0.2001   2.7   12.6	Cen X-3                       
186.5182 -62.9264    0.0  42.1 -116.5   0.1809   1.4   10.1	GX 301-2                      
172.9898 -72.6520    0.4  31.5 -112.2   1.8039  29.3 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
61.196610 962.757800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5317 -40.5410    1.2  36.8  153.2   9.8057  10.0    0.8	Vela X-1                      
170.3601 -60.6302   19.1  12.1 -162.5   0.3136   0.6    1.4	Cen X-3                       
186.6471 -62.7788    0.5  11.1 -122.2  10.6396  21.2    0.6	GX 301-2                      
264.7430 -44.4504 2005.8  48.6  -48.6  -0.0157  -0.0    0.0	4U 1735-44                    
 79.9274 -56.9142    2.7  37.7   86.6   8.0270   4.3 ------	UNKNOWN                       
336.6646 -52.7851    3.9  54.0   11.4   9.3022   3.0 ------	UNKNOWN                       
182.2933 -50.3302    2.5  22.7 -140.9   2.5356   4.6 ------	UNKNOWN                       
242.8604 -44.2622    3.5  42.3  -68.8   9.1513   3.3 ------	UNKNOWN                       
259.6709 -44.5476    4.0  47.0  -53.1   7.5360   2.9 ------	UNKNOWN