GRB161117B: 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: Sun Dec  4 15:20:02 EST 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger722642
======================================================================

  Trigger: 00722642      Segment: 000

  BAT Trigger Time: 501069000.896   [s; MET]
      Trigger Stop: 501069001.92   [s; MET]
               UTC: 2016-11-17T09:49:43.723760    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 298.855450845301   Dec: -67.7066746073387  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.7
     Image Trigger?:     NO
     Rate S/N Ratio:     22.293496809608  [ if not an image trigger ]
     Image S/N Ratio:    10.7

  Analysis Position:   [ source = BAT ]
    RA: 298.855450845301   Dec: -67.7066746073387  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 298.818708995281   Dec: -67.6726806312609  [deg; J2000]  
        { 19h 55m 16.5s , -67d 40' 21.7" }
         +/- 1.53888479174843 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.595643142058021 [arcmin] (formal 1-sigma fit error)
    SNR: 16.4316465024152
 
  Angular difference between the analysis and refined position is 2.204654 arcmin
 
  Partial Coding Fraction: 0.4375    [ including projection effects ]

  Duration
     T90: 152.311999976635 +/- 3.15355295925813
        Measured from: -0.90800005197525
                   to: 151.40399992466     [s; relative to TRIGTIME]
     T50: 34.7319999933243 +/- 0.924173132036283
        Measured from: 101.563999950886
                   to: 136.29599994421     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 134.083999991417     
                   to: 135.083999991417     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.45600003004074     
                   to: 157.443999946117     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.555942   4.691352   2.290992   0.276877
           0.089018   0.092427   0.079369   0.069098 [error]
 Peak      0.244415   0.285025   0.106547   0.004258
           0.009245   0.009806   0.007085   0.004907 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  163.900   -6.456  157.444
T90   152.312   -0.908  151.404
T50    34.732  101.564  136.296
Peak    1.000  134.084  135.084
 
 
====== 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: CPL)
 
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      -2.109    -0.060      0.059       -           -               -         3.97e-03     -1.29e-04          1.29e-04      62.310   57
CPL     -1.390    -0.269      0.286       38.852      -6.199         4.449      9.45e-03     -2.57e-03          3.85e-03      39.170   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      -2.193     -0.084     0.082       -           -               -         3.33e-02     -1.86e-03          1.84e-03      73.800   57
CPL     -0.767     -0.456     0.515       35.896      -3.922         3.230      2.18e-01     -9.84e-02          2.15e-01      37.660   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-06  1.88e-06  1.74e-06  2.83e-06  6.05e-06  7.92e-06   erg/cm2
      90%_error_low -7.34e-08 -5.48e-08 -7.93e-08 -2.65e-07 -1.82e-07 -3.34e-07   erg/cm2
      90%_error_hi   7.47e-08  5.48e-08  7.96e-08  2.84e-07  1.83e-07  3.46e-07   erg/cm2
Peak flux       PL   2.68e+00  1.80e+00  7.85e-01  4.74e-01  5.50e+00  5.73e+00   ph/cm2/s
      90%_error_low -1.82e-01 -8.33e-02 -5.66e-02 -6.17e-02 -2.64e-01 -2.68e-01   ph/cm2/s
      90%_error_hi   1.85e-01  8.33e-02  5.69e-02  6.71e-02  2.65e-01  2.68e-01   ph/cm2/s
 
Fluence        CPL   1.31e-06  1.98e-06  1.72e-06  1.05e-06  5.64e-06  6.06e-06   erg/cm2
      90%_error_low -9.23e-08 -6.58e-08 -8.84e-08 -2.88e-07 -2.27e-07 -3.80e-07   erg/cm2
      90%_error_hi   9.38e-08  6.64e-08  8.77e-08  4.12e-07  2.29e-07  4.82e-07   erg/cm2
Peak flux      CPL     N/A      N/A      N/A      N/A      N/A      N/A     ph/cm2/s
      90%_error_low -1.82e-01 -8.33e-02 -5.66e-02 -6.17e-02 -2.64e-01 -2.68e-01   ph/cm2/s
      90%_error_hi   1.85e-01  8.33e-02  5.69e-02  6.71e-02  2.65e-01  2.68e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  298.8187   -67.6727   0.0118    29.8262   -70.0056         1.3976071     16.432 TRIG_00722642                 
 
Foreground time interval of the image:
 -6.456  13.005 (delta_t =  19.461 [sec])
Background time interval of the image:
-460.795 -442.400 (delta_t =  18.395 [sec])
-239.896  -6.456 (delta_t = 233.440 [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   -6.456 sec. to  157.444 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.10947     ( -0.0596138   0.0589789 )
Norm@50keV  : 3.96963E-03    ( -0.000129343   0.000128736 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.31 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     57 degrees of freedom 
# Null hypothesis probability =   2.930626e-01
 
Photon flux (15-150 keV)    in 163.9 sec: 0.627516 ( -0.020034  0.020123 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.05173e-06 ( -1.82122e-07  1.82732e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -6.456 sec. to  157.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.38966     ( -0.268537   0.286184 )
Epeak [keV] : 38.8517      ( -6.19895 4.44912 )
Norm@50keV  : 9.45456E-03    ( -0.00257337   0.00384693 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.17 using 59 PHA bins.
# Reduced chi-squared =         0.6994 for     56 degrees of freedom 
# Null hypothesis probability =   9.573356e-01
 
Photon flux (15-150 keV)    in 163.9 sec: 0.591572 ( -0.023332  0.023476 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.6387e-06 ( -2.27061e-07  2.29419e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from  134.084 sec. to  135.084 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.19317     ( -0.0841548   0.0823036 )
Norm@50keV  : 3.33090E-02    ( -0.001857   0.00184312 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.80 using 59 PHA bins.
# Reduced chi-squared =          1.295 for     57 degrees of freedom 
# Null hypothesis probability =   6.653657e-02
 
Photon flux (15-150 keV)    in 1 sec: 5.49525 ( -0.26422  0.2646 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.12939e-07 ( -1.56492e-08  1.57158e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  134.084 sec. to  135.084 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.766801     ( -0.455642   0.514564 )
Epeak [keV] : 35.8961      ( -3.92181 3.22934 )
Norm@50keV  : 0.218418    ( -0.0983894   0.215037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.66 using 59 PHA bins.
# Reduced chi-squared =         0.6724 for     56 degrees of freedom 
# Null hypothesis probability =   9.715954e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 152.312 sec.
Hardness ratio (energy fluence ratio) = 0.870923287302

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

S(15-50 keV)  = 3.283861e-06
S(50-150 keV) = 2.3549018e-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 = 1.960316106348038E-01, IMY = 5.387574895141908E-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:
-460.795400 -442.400200
-239.896000 -6.456000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 19.4876 -22.8531    3.1  41.4   65.4   3.1002   3.8 ------	UNKNOWN                       
342.1504 -27.7781    3.1  42.6   13.7   1.3283   3.7 ------	UNKNOWN                       
343.7355 -30.1288    2.8  39.9   14.3   1.3393   4.2 ------	UNKNOWN                       
111.7112 -50.7592    2.8  47.6 -176.9   1.7296   4.1 ------	UNKNOWN                       
301.3947 -30.1016    2.8  56.9  -29.8   5.8881   4.1 ------	UNKNOWN                       

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

Time interval of the image:
-6.456000 13.004600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6676 -53.6606    2.5  53.1 -158.8   0.8675   4.6 ------	UNKNOWN                       
298.8191 -67.6725    0.7  29.8  -70.0   1.3963  16.4 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
63.604620 962.134000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.0214 -60.5466   18.2  46.5 -163.2  -0.8441  -0.6    9.8	Cen X-3                       
186.5953 -62.7527    2.9  40.8 -154.7   4.1077   4.0    2.0	GX 301-2                      
255.9907 -38.0253    0.0  37.9  -75.8   3.6928   2.1   10.9	4U 1700-377                   
256.6201 -36.4973   12.1  39.1  -74.1   1.7141   1.0   10.0	GX 349+2                      
264.6216 -44.3284   11.3  29.5  -70.1  -1.0420  -1.0    9.0	4U 1735-44                    
270.3866 -24.9879    6.6  46.1  -51.9   5.1715   1.7    7.8	GX 5-1                        
270.0826 -25.7435    7.5  45.5  -52.6  -4.2345  -1.5   11.9	GRS 1758-258                  
275.9579 -30.5285   21.1  39.6  -46.9   0.6026   0.6    9.8	H1820-303                     
284.8944 -25.0246    5.9  43.5  -33.6  -2.1238  -1.9    9.9	HT1900.1-2455                 
263.2192 -33.8289   17.7  39.6  -64.6  -1.3004  -0.6   11.5	GX 354-0                      
318.3007 -19.2614    3.5  50.0    9.1   4.8442   3.3 ------	UNKNOWN                       
298.8622 -67.6877    0.7   0.0  -65.9   9.9861  17.5 ------	UNKNOWN                       
153.8534 -72.4206    2.4  38.0 -178.7   3.9907   4.8 ------	UNKNOWN                       
201.5728 -60.3260    3.0  38.8 -143.4   3.7152   3.8 ------	UNKNOWN                       
286.3713 -11.5497    4.8  56.8  -29.8  11.7215   2.4 ------	UNKNOWN