GRB110106B: 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: Tue Jan 14 00:54:40 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger441676
======================================================================

  Trigger: 00441676      Segment: 000

  BAT Trigger Time: 316041983.552   [s; MET]
      Trigger Stop: 316041984.576   [s; MET]
               UTC: 2011-01-06T21:26:17.013580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 134.195686538916   Dec: 46.9977905824713  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.63
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8062484748657  [ if not an image trigger ]
     Image S/N Ratio:    7.63

  Analysis Position:   [ source = BAT ]
    RA: 134.195686538916   Dec: 46.9977905824713  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 134.164280393182   Dec: 47.0095900249714  [deg; J2000]  
        { 08h 56m 39.4s , +47d 00' 34.5" }
         +/- 1.22971144764029 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.515263113461609 [arcmin] (formal 1-sigma fit error)
    SNR: 22.6374795724835
 
  Angular difference between the analysis and refined position is 1.467162 arcmin
 
  Partial Coding Fraction: 0.375    [ including projection effects ]

  Duration
     T90: 43.4240000247955 +/- 16.5948695532968
        Measured from: -22.3999999761581
                   to: 21.0240000486374     [s; relative to TRIGTIME]
     T50: 14.8480000495911 +/- 1.32191377166955
        Measured from: 0.240000009536743
                   to: 15.0880000591278     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.88400000333786     
                   to: 5.88400000333786     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -30.4480000138283     
                   to: 23.5040000081062     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.178768   1.322583   0.790134   0.233916
           0.073649   0.075645   0.066288   0.056997 [error]
 Peak      0.055432   0.095736   0.072195   0.008300
           0.010692   0.011452   0.010142   0.008569 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   53.952  -30.448   23.504
T90    43.424  -22.400   21.024
T50    14.848    0.240   15.088
Peak    1.000    4.884    5.884
 
 
====== 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      -1.819    -0.124      0.122       -           -               -         4.13e-03     -3.07e-04          3.03e-04      36.480   57
CPL     -1.674    -0.459      0.495      101.994      N/A           N/A         4.95e-03        N/A               N/A         36.180   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      -1.545     -0.230     0.224       -           -               -         1.63e-02     -2.29e-03          2.27e-03      43.060   57
CPL     -0.516     -1.020     1.307       72.959     -18.185       593.237      5.32e-02     -5.32e-02          1.75e-01      40.120   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   3.84e-07  5.81e-07  6.59e-07  1.42e-06  2.05e-06  3.05e-06   erg/cm2
      90%_error_low -3.99e-08 -3.85e-08 -6.66e-08 -2.77e-07 -1.54e-07 -3.42e-07   erg/cm2
      90%_error_hi   4.09e-08  3.85e-08  6.68e-08  3.19e-07  1.55e-07  3.75e-07   erg/cm2
Peak flux       PL   6.99e-01  6.85e-01  4.70e-01  5.07e-01  2.06e+00  2.36e+00   ph/cm2/s
      90%_error_low -1.52e-01 -9.84e-02 -8.21e-02 -1.57e-01 -2.84e-01 -3.23e-01   ph/cm2/s
      90%_error_hi   1.62e-01  9.76e-02  8.12e-02  1.93e-01  2.84e-01  3.24e-01   ph/cm2/s
 
Fluence        CPL   3.77e-07  5.91e-07  6.60e-07  1.10e-06  2.02e-06  2.72e-06   erg/cm2
      90%_error_low -4.53e-08 -4.59e-08 -6.83e-08 -5.88e-07 -1.79e-07 -6.20e-07   erg/cm2
      90%_error_hi   4.34e-08  4.96e-08  6.86e-08  7.29e-07  1.75e-07  4.56e-07   erg/cm2
Peak flux      CPL   5.76e-01  7.49e-01  5.12e-01  2.00e-01  1.98e+00  2.04e+00   ph/cm2/s
      90%_error_low -1.91e-01 -1.19e-01 -9.63e-02 -1.22e-01 -2.98e-01 -3.33e-01   ph/cm2/s
      90%_error_hi   2.00e-01  1.24e-01  9.95e-02  3.13e-01  2.97e-01  4.02e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  134.1643    47.0096   0.0086    33.9982    41.1004         3.6740091     22.637 TRIG_00441676                 
 
Foreground time interval of the image:
-30.448  23.504 (delta_t =  53.952 [sec])
Background time interval of the image:
-239.552 -30.448 (delta_t = 209.104 [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  -30.448 sec. to   23.504 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.81923     ( -0.12416   0.121751 )
Norm@50keV  : 4.12901E-03    ( -0.00030681   0.000303348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.48 using 59 PHA bins.
# Reduced chi-squared =         0.6399 for     57 degrees of freedom 
# Null hypothesis probability =   9.843703e-01
 
Photon flux (15-150 keV)    in 53.95 sec: 0.573296 ( -0.038591  0.038635 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04985e-06 ( -1.53746e-07  1.55219e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -30.448 sec. to   23.504 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.6739     ( -0.458668   0.494909 )
Epeak [keV] : 101.994      (   )
Norm@50keV  : 4.95492E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.18 using 59 PHA bins.
# Reduced chi-squared =         0.6460 for     56 degrees of freedom 
# Null hypothesis probability =   9.816938e-01
 
Photon flux (15-150 keV)    in 53.95 sec: 0.569308 ( -0.040515  0.040462 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.02042e-06 ( -1.7896e-07  1.75225e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    4.884 sec. to    5.884 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.54452     ( -0.229837   0.224066 )
Norm@50keV  : 1.62806E-02    ( -0.00228795   0.00226987 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.06 using 59 PHA bins.
# Reduced chi-squared =         0.7554 for     57 degrees of freedom 
# Null hypothesis probability =   9.141939e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.05783 ( -0.28378  0.28431 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53409e-07 ( -2.31163e-08  2.33575e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    4.884 sec. to    5.884 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.515762     ( -1.01959   1.30697 )
Epeak [keV] : 72.9586      ( -18.1849 593.238 )
Norm@50keV  : 5.31923E-02    ( -0.0531939   0.175117 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.12 using 59 PHA bins.
# Reduced chi-squared =         0.7164 for     56 degrees of freedom 
# Null hypothesis probability =   9.460144e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.97682 ( -0.29806  0.29692 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.90471e-08 ( -2.85729e-08  2.27061e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 43.424 sec.
Hardness ratio (energy fluence ratio) = 1.13352244919

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

S(15-50 keV)  = 9.654432e-07
S(50-150 keV) = 1.0844005e-06

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 = 5.082475128329527E-01, IMY = -4.433787700491502E-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:
-239.552000 -30.448000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6171  22.0250    1.3  42.3  121.5   7.3969   8.8    1.1	Crab                          
175.9834  57.2168    3.0  43.2   -0.6   1.1909   3.8 ------	UNKNOWN                       
  1.7665  64.9856    3.0  31.2 -105.3   1.1238   3.9 ------	UNKNOWN                       
 14.9817  33.0182    2.3  49.5 -149.2   2.2151   4.9 ------	UNKNOWN                       
  5.4808  55.4289    2.7  35.9 -120.8   1.4283   4.2 ------	UNKNOWN                       
297.4949  74.5261    2.5  39.1  -67.6   2.3857   4.6 ------	UNKNOWN                       
260.3759  68.8553    3.3  47.0  -53.0   3.1610   3.5 ------	UNKNOWN                       
334.2954  63.6296    2.3  40.8  -93.4   4.3307   5.1 ------	UNKNOWN                       
353.2903  50.7439    2.2  44.2 -117.2   4.1705   5.3 ------	UNKNOWN                       

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

Time interval of the image:
-30.448000 23.504000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.8526  21.9739    7.2  42.3  121.2  -0.6408  -1.6   12.4	Crab                          
134.1641  47.0094    0.5  34.0   41.1   3.6728  22.6 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
310.548600 962.535200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 65.1235  38.1312    2.4  50.0  146.3  10.5450   4.9 ------	UNKNOWN                       
146.7446  -4.0500    2.6  52.2   24.0   8.2959   4.4 ------	UNKNOWN                       
180.4881   2.8160    3.2  59.6  -17.0  10.4237   3.6 ------	UNKNOWN                       
  0.7692  70.3030    5.1  58.0 -156.9   6.4668   2.3 ------	UNKNOWN                       
193.3434  31.5342    4.2  47.1  -53.0   6.7308   2.7 ------	UNKNOWN                       
191.6284  21.9902    3.8  52.1  -42.1   8.2307   3.1 ------	UNKNOWN