GRB111117A: 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: Mon Jan 13 18:12:24 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger507901
======================================================================

  Trigger: 00507901      Segment: 000

  BAT Trigger Time: 343224829.504   [s; MET]
      Trigger Stop: 343224830.016   [s; MET]
               UTC: 2011-11-17T12:13:41.921600    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 12.70235957439   Dec: 23.0211326425349  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.59
     Image Trigger?:     NO
     Rate S/N Ratio:     28.2665880502051  [ if not an image trigger ]
     Image S/N Ratio:    12.59

  Analysis Position:   [ source = BAT ]
    RA: 12.70235957439   Dec: 23.0211326425349  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 12.7059642021869   Dec: 23.0099679896018  [deg; J2000]  
        { 00h 50m 49.4s , +23d 00' 35.9" }
         +/- 1.77213287702634 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.81769122145966 [arcmin] (formal 1-sigma fit error)
    SNR: 13.431474450327
 
  Angular difference between the analysis and refined position is 0.698830 arcmin
 
  Partial Coding Fraction: 0.5546875    [ including projection effects ]

  Duration
     T90: 0.463999927043915 +/- 0.0536656069364681
        Measured from: 0.0360000133514404
                   to: 0.499999940395355     [s; relative to TRIGTIME]
     T50: 0.339999914169312 +/- 0.0430812729442087
        Measured from: 0.120000004768372
                   to: 0.459999918937683     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.226000010967255     
                   to: 0.773999989032745     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.0239999890327454     
                   to: 0.519999980926514     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.018852   0.048867   0.070473   0.031176
           0.005902   0.007084   0.007501   0.006253 [error]
 Peak      0.022688   0.054585   0.073917   0.031384
           0.007903   0.009103   0.008905   0.008176 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.496    0.024    0.520
T90     0.464    0.036    0.500
T50     0.340    0.120    0.460
Peak    1.000   -0.226    0.774
 
 
====== 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      -0.517    -0.221      0.238       -           -               -         2.20e-02     -3.13e-03          3.05e-03      49.480   57
CPL      0.051    -0.663      1.178      233.628    -233.628      -233.628      3.65e-02     -1.67e-02          5.97e-02      48.410   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      -0.590     -0.266     0.291       -           -               -         1.17e-02     -1.95e-03          1.89e-03      64.490   57
CPL     -0.274     -0.552     1.314      350.399    -350.399      -350.399      1.55e-02     -1.55e-02          3.03e-02      64.220   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   5.60e-09  1.89e-08  5.29e-08  4.45e-07  1.45e-07  5.23e-07   erg/cm2
      90%_error_low -1.59e-09 -3.46e-09 -6.57e-09 -1.19e-07 -1.88e-08 -1.21e-07   erg/cm2
      90%_error_hi   1.79e-09  3.41e-09  6.55e-09  1.50e-07  1.89e-08  1.51e-07   erg/cm2
Peak flux       PL   2.02e-01  3.52e-01  4.67e-01  1.27e+00  1.36e+00  2.29e+00   ph/cm2/s
      90%_error_low -6.86e-02 -7.88e-02 -6.72e-02 -3.70e-01 -2.04e-01 -3.92e-01   ph/cm2/s
      90%_error_hi   8.00e-02  7.81e-02  6.70e-02  4.77e-01  2.05e-01  4.45e-01   ph/cm2/s
 
Fluence        CPL   4.64e-09  1.91e-08  5.66e-08  2.39e-07  1.43e-07  3.19e-07   erg/cm2
      90%_error_low -2.05e-09 -3.77e-09 -8.77e-09 -1.42e-07 -1.99e-08 -1.41e-07   erg/cm2
      90%_error_hi   2.34e-09  3.72e-09  9.05e-09  2.34e-07  1.95e-08  2.62e-07   erg/cm2
Peak flux      CPL   1.81e-01  3.52e-01  4.86e-01  9.51e-01  1.35e+00  1.99e+00   ph/cm2/s
      90%_error_low -8.99e-02 -8.40e-02 -8.11e-02     N/A   -2.05e-01 -6.23e-01   ph/cm2/s
      90%_error_hi   9.58e-02  8.15e-02  9.12e-02     N/A    2.08e-01  4.87e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   12.7060    23.0100   0.0143    24.4439    63.6734         0.1740815     13.431 TRIG_00507901                 
 
Foreground time interval of the image:
  0.024   0.520 (delta_t =   0.496 [sec])
Background time interval of the image:
-60.203   0.024 (delta_t =  60.227 [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    0.024 sec. to    0.520 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.517363     ( -0.220921   0.237506 )
Norm@50keV  : 2.19917E-02    ( -0.00312976   0.00304864 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.48 using 59 PHA bins.
# Reduced chi-squared =         0.8681 for     57 degrees of freedom 
# Null hypothesis probability =   7.500172e-01
 
Photon flux (15-150 keV)    in 0.496 sec: 2.59728 ( -0.32789  0.32888 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45282e-07 ( -1.88398e-08  1.891e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.024 sec. to    0.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.0505499     ( -0.663161   1.17801 )
Epeak [keV] : 233.628      ( -233.628 -233.628 )
Norm@50keV  : 3.65259E-02    ( -0.0166932   0.0596943 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.41 using 59 PHA bins.
# Reduced chi-squared =         0.8645 for     56 degrees of freedom 
# Null hypothesis probability =   7.544951e-01
 
Photon flux (15-150 keV)    in 0.496 sec: 2.55403 ( -0.3361  0.33647 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.43288e-07 ( -1.98837e-08  1.95405e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   -0.226 sec. to    0.774 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.590213     ( -0.266254   0.290641 )
Norm@50keV  : 1.16605E-02    ( -0.00195042   0.00188626 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.49 using 59 PHA bins.
# Reduced chi-squared =          1.131 for     57 degrees of freedom 
# Null hypothesis probability =   2.313492e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.36306 ( -0.20363  0.20478 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.49834e-07 ( -2.26185e-08  2.27259e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.226 sec. to    0.774 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.274266     ( -0.551878   1.31362 )
Epeak [keV] : 350.399      ( -350.4 -350.4 )
Norm@50keV  : 1.55007E-02    ( -0.0155007   0.0302948 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.22 using 59 PHA bins.
# Reduced chi-squared =          1.147 for     56 degrees of freedom 
# Null hypothesis probability =   2.106920e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.34688 ( -0.20494  0.20848 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.51363e-10 ( 0  0 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 0.4639999 sec.
Hardness ratio (energy fluence ratio) = 2.79460153005

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

S(15-50 keV)  = 2.4523945e-08
S(50-150 keV) = 1.2075894e-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 = 2.015853254628830E-01, IMY = -4.074000223846641E-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:
-60.203410 0.024000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0832  40.9692   67.9  50.4  -31.1   0.0385   0.2    1.6	Cyg X-3                       
326.0190  38.4246    6.1  37.7  -22.4  -0.2204  -1.9    9.5	Cyg X-2                       

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

Time interval of the image:
0.024000 0.520000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.2307  41.0342   15.3  50.3  -31.0   0.0180   0.8    7.3	Cyg X-3                       
325.9933  38.4144   10.2  37.7  -22.4  -0.0146  -1.1   10.1	Cyg X-2                       
 24.2217 -11.7821    2.1  38.1  133.8   0.1182   5.5 ------	UNKNOWN                       
 12.7060  23.0100    0.9  24.4   63.7   0.1741  13.4 ------	UNKNOWN                       
 12.9139 -27.4070    3.0  41.5  163.0   0.0663   3.9 ------	UNKNOWN                       
  7.3075 -26.3830    2.5  38.2  169.1   0.0659   4.6 ------	UNKNOWN                       
308.6775  12.3679    2.2  42.7  -69.6   0.1709   5.3 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
60.996600 962.543300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
325.9830  38.3698   22.2  42.5  -56.1   0.9678   0.5    9.3	Cyg X-2                       
 50.0780  30.0149    3.1  34.0   71.6   3.9270   3.7 ------	UNKNOWN                       
 42.8490  -1.0326    3.0  38.0  126.8   4.9513   3.9 ------	UNKNOWN                       
 29.1050   5.0566    2.8  24.0  137.7   2.3302   4.2 ------	UNKNOWN                       
 20.9754 -14.6758    2.5  38.6  168.6   3.5795   4.6 ------	UNKNOWN                       
  6.0076  57.4971    3.1  34.8   -4.7   2.3698   3.7 ------	UNKNOWN                       
359.8194  16.6602    2.6  13.7 -113.9   2.1108   4.4 ------	UNKNOWN                       
359.8102 -34.7975    2.4  59.1 -166.1  17.6193   4.9 ------	UNKNOWN                       
313.1762  57.5854    3.7  54.5  -33.0   8.9162   3.2 ------	UNKNOWN