GRB161202A

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 Dec 19 15:46:53 EST 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger725036
======================================================================

  Trigger: 00725036      Segment: 000

  BAT Trigger Time: 502413189.952   [s; MET]
      Trigger Stop: 502413190.464   [s; MET]
               UTC: 2016-12-02T23:12:52.703120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 356.894953923009   Dec: 19.6396627418034  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.12
     Image Trigger?:     NO
     Rate S/N Ratio:     21.1896201004171  [ if not an image trigger ]
     Image S/N Ratio:    11.12

  Analysis Position:   [ source = BAT ]
    RA: 356.894953923009   Dec: 19.6396627418034  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 356.904392451795   Dec: 19.6523165014102  [deg; J2000]  
        { 23h 47m 37.1s , +19d 39' 08.3" }
         +/- 0.705308449646534 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.190431642985255 [arcmin] (formal 1-sigma fit error)
    SNR: 50.0863846698242
 
  Angular difference between the analysis and refined position is 0.927837 arcmin
 
  Partial Coding Fraction: 0.8671875    [ including projection effects ]

  Duration
     T90: 118.495999932289 +/- 0.712474578189743
        Measured from: -62.1560000181198
                   to: 56.3399999141693     [s; relative to TRIGTIME]
     T50: 79.7799999713898 +/- 15.6003697077415
        Measured from: -52.2480000257492
                   to: 27.5319999456406     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.09200000762939     
                   to: 3.09200000762939     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -63.4120000004768     
                   to: 65.7919999957085     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.606249   5.276495   3.824425   0.924712
           0.099806   0.111488   0.105824   0.101291 [error]
 Peak      0.143211   0.259187   0.255595   0.068204
           0.009268   0.010994   0.010968   0.008679 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  129.204  -63.412   65.792
T90   118.496  -62.156   56.340
T50    79.780  -52.248   27.532
Peak    1.000    2.092    3.092
 
 
====== 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      -1.571    -0.054      0.054       -           -               -         7.15e-03     -2.02e-04          2.02e-04      52.990   57
CPL     -1.322    -0.211      0.222      142.578     -43.711       413.978      9.40e-03     -1.90e-03          2.53e-03      48.920   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      -1.188     -0.078     0.079       -           -               -         4.99e-02     -2.30e-03          2.30e-03      50.010   57
CPL     -0.562     -0.334     0.362      126.951     -27.559        79.150      9.71e-02     -2.84e-02          4.39e-02      39.100   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   1.26e-06  2.22e-06  2.99e-06  8.27e-06  8.68e-06  1.47e-05   erg/cm2
      90%_error_low -6.75e-08 -6.88e-08 -1.10e-07 -6.68e-07 -2.61e-07 -7.37e-07   erg/cm2
      90%_error_hi   6.89e-08  6.86e-08  1.10e-07  7.08e-07  2.62e-07  7.69e-07   erg/cm2
Peak flux       PL   1.52e+00  1.85e+00  1.62e+00  2.44e+00  5.84e+00  7.43e+00   ph/cm2/s
      90%_error_low -1.32e-01 -9.98e-02 -8.62e-02 -2.63e-01 -2.76e-01 -3.63e-01   ph/cm2/s
      90%_error_hi   1.36e-01  9.92e-02  8.58e-02  2.81e-01  2.77e-01  3.66e-01   ph/cm2/s
 
Fluence        CPL   1.20e-06  2.26e-06  3.03e-06  5.80e-06  8.50e-06  1.23e-05   erg/cm2
      90%_error_low -8.57e-08 -7.62e-08 -1.18e-07 -1.44e-06 -3.02e-07 -1.47e-06   erg/cm2
      90%_error_hi   8.73e-08  7.69e-08  1.19e-07  2.02e-06  3.00e-07  2.02e-06   erg/cm2
Peak flux      CPL   1.31e+00  1.92e+00  1.74e+00  1.36e+00  5.70e+00  6.33e+00   ph/cm2/s
      90%_error_low -1.66e-01 -1.12e-01 -1.06e-01 -3.39e-01 -2.87e-01 -4.54e-01   ph/cm2/s
      90%_error_hi   1.70e-01  1.13e-01  1.08e-01  4.76e-01  2.87e-01  5.45e-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
  356.9044    19.6523   0.0039    30.7910   -13.2289         5.0352379     50.086 TRIG_00725036                 
 
Foreground time interval of the image:
-24.851  11.149 (delta_t =  36.000 [sec])
Background time interval of the image:

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  -63.412 sec. to   65.792 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.57103     ( -0.0540108   0.0538573 )
Norm@50keV  : 7.15327E-03    ( -0.000201658   0.000201523 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.99 using 59 PHA bins.
# Reduced chi-squared =         0.9297 for     57 degrees of freedom 
# Null hypothesis probability =   6.261940e-01
 
Photon flux (15-150 keV)    in 129.2 sec: 0.911200 ( -0.027524  0.027599 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.67646e-06 ( -2.61108e-07  2.61785e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -63.412 sec. to   65.792 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.32242     ( -0.211058   0.222112 )
Epeak [keV] : 142.578      ( -43.7112 413.978 )
Norm@50keV  : 9.39952E-03    ( -0.00189864   0.00252775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.92 using 59 PHA bins.
# Reduced chi-squared =         0.8735 for     56 degrees of freedom 
# Null hypothesis probability =   7.376292e-01
 
Photon flux (15-150 keV)    in 129.2 sec: 0.894393 ( -0.030699  0.03079 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.50007e-06 ( -3.01792e-07  3.00334e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    2.092 sec. to    3.092 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.18837     ( -0.0784471   0.0786508 )
Norm@50keV  : 4.98614E-02    ( -0.00229695   0.00229695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.01 using 59 PHA bins.
# Reduced chi-squared =         0.8773 for     57 degrees of freedom 
# Null hypothesis probability =   7.326547e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.84334 ( -0.27645  0.27668 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.07598e-07 ( -2.59165e-08  2.60071e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.092 sec. to    3.092 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.562212     ( -0.334206   0.362369 )
Epeak [keV] : 126.951      ( -27.5593 79.1503 )
Norm@50keV  : 9.71171E-02    ( -0.0284202   0.0439106 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.10 using 59 PHA bins.
# Reduced chi-squared =         0.6982 for     56 degrees of freedom 
# Null hypothesis probability =   9.580796e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.69569 ( -0.28731  0.28717 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.14594e-07 ( -1.68478e-08  2.82658e-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 = 5.800932083954842E-01, IMY = 1.363683258125580E-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:

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

Time interval of the image:
-24.851400 11.148590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
356.9044  19.6523    0.2  30.8  -13.2   5.0342  50.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
63.148670 423.748600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0723  40.9103   34.6  46.5  -35.0   0.2678   0.3    3.1	Cyg X-3                       
326.2805  38.4466    4.9  32.5  -31.3   0.9640   2.4    9.1	Cyg X-2                       
299.8092  65.3728    2.6  58.7   -7.5  11.7652   4.5 ------	UNKNOWN                       
327.3029 -15.1803    2.4  45.4 -121.3   6.6984   4.8 ------	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