GRB160607A: 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 Jun 21 08:43:38 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger689597
======================================================================

  Trigger: 00689597      Segment: 000

  BAT Trigger Time: 486990857.216   [s; MET]
      Trigger Stop: 486990858.24   [s; MET]
               UTC: 2016-06-07T11:14:00.834700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 13.6632736804159   Dec: -4.94811943449746  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    24.09
     Image Trigger?:     NO
     Rate S/N Ratio:     172.840967365958  [ if not an image trigger ]
     Image S/N Ratio:    24.09

  Analysis Position:   [ source = BAT ]
    RA: 13.6632736804159   Dec: -4.94811943449746  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 13.6617219853574   Dec: -4.95280730195515  [deg; J2000]  
        { 00h 54m 38.8s , -04d 57' 10.1" }
         +/- 0.414344992756419 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.103758389326915 [arcmin] (formal 1-sigma fit error)
    SNR: 107.08877698991
 
  Angular difference between the analysis and refined position is 0.296171 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 33.4919999837875 +/- 0.446443718595745
        Measured from: -1.1360000371933
                   to: 32.3559999465942     [s; relative to TRIGTIME]
     T50: 8.49199998378754 +/- 0.237453154543634
        Measured from: 5.10399997234344
                   to: 13.595999956131     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 11.6480000019073     
                   to: 12.6480000019073     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -14.5480000376701     
                   to: 44.0799999833107     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     7.149367  11.337426   9.927665   2.633003
           0.060918   0.070297   0.066158   0.048275 [error]
 Peak      0.540501   0.958956   0.940538   0.243562
           0.013050   0.016748   0.016918   0.010385 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   58.628  -14.548   44.080
T90    33.492   -1.136   32.356
T50     8.492    5.104   13.596
Peak    1.000   11.648   12.648
 
 
====== 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      -1.369    -0.023      0.023       -           -               -         3.65e-02     -4.94e-04          4.93e-04      43.800   57
CPL     -1.145    -0.097      0.099      247.050     -55.404       133.812      4.46e-02     -3.64e-03          4.03e-03      28.190   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      -1.226     -0.038     0.038       -           -               -         1.85e-01     -4.07e-03          4.07e-03      66.720   57
CPL     -0.686     -0.165     0.171      143.818     -20.808        36.701      3.17e-01     -4.67e-02          5.67e-02      33.200   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   2.42e-06  4.81e-06  7.46e-06  2.54e-05  2.08e-05  4.00e-05   erg/cm2
      90%_error_low -7.15e-08 -8.58e-08 -9.60e-08 -7.53e-07 -2.59e-07 -7.67e-07   erg/cm2
      90%_error_hi   7.24e-08  8.58e-08  9.61e-08  7.69e-07  2.59e-07  7.78e-07   erg/cm2
Peak flux       PL   1.23e-03  1.45e-02  2.38e-01  2.08e+01  1.04e+00  2.09e+01   ph/cm2/s
      90%_error_low     N/A       N/A       N/A       N/A       N/A       N/A     ph/cm2/s
      90%_error_hi      N/A       N/A       N/A       N/A       N/A       N/A     ph/cm2/s
 
Fluence        CPL   2.24e-06  4.81e-06  7.66e-06  2.04e-05  2.07e-05  3.51e-05   erg/cm2
      90%_error_low -1.01e-07 -8.76e-08 -1.29e-07 -1.80e-06 -2.66e-07 -1.80e-06   erg/cm2
      90%_error_hi   1.03e-07  8.76e-08  1.29e-07  2.02e-06  2.66e-07  2.01e-06   erg/cm2
Peak flux      CPL   5.02e+00  7.08e+00  6.35e+00  5.52e+00  2.12e+01  2.40e+01   ph/cm2/s
      90%_error_low -3.40e-01 -2.03e-01 -1.86e-01 -6.60e-01 -5.37e-01 -8.85e-01   ph/cm2/s
      90%_error_hi   3.48e-01  2.03e-01  1.87e-01  7.71e-01  5.38e-01  9.61e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   13.6617    -4.9528   0.0018    27.8057    -4.9107        24.9083839    107.089 TRIG_00689597                 
 
Foreground time interval of the image:
-14.548  15.485 (delta_t =  30.033 [sec])
Background time interval of the image:
-29.515 -14.548 (delta_t =  14.967 [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  -14.548 sec. to   44.080 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.36873     ( -0.0232367   0.0233175 )
Norm@50keV  : 3.65068E-02    ( -0.000493473   0.000492611 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.80 using 59 PHA bins.
# Reduced chi-squared =         0.7685 for     57 degrees of freedom 
# Null hypothesis probability =   9.002288e-01
 
Photon flux (15-150 keV)    in 58.63 sec: 4.41538 ( -0.07103  0.07129 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.08209e-05 ( -2.58705e-07  2.59046e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -14.548 sec. to   44.080 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.14498     ( -0.097366   0.0992864 )
Epeak [keV] : 247.050      ( -55.4048 133.812 )
Norm@50keV  : 4.45855E-02    ( -0.00364005   0.0040257 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.19 using 59 PHA bins.
# Reduced chi-squared =         0.5035 for     56 degrees of freedom 
# Null hypothesis probability =   9.992966e-01
 
Photon flux (15-150 keV)    in 58.63 sec: 2.62052 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.06771e-05 ( -2.65837e-07  2.65947e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   11.648 sec. to   12.648 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.22598     ( -0.0379366   0.0379953 )
Norm@50keV  : 0.185204    ( -0.00407342   0.00407177 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.72 using 59 PHA bins.
# Reduced chi-squared =          1.171 for     57 degrees of freedom 
# Null hypothesis probability =   1.774969e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.03905 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.86569e-06 ( -4.28019e-08  4.28444e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   11.648 sec. to   12.648 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.686066     ( -0.164959   0.17091 )
Epeak [keV] : 143.818      ( -20.8076 36.7015 )
Norm@50keV  : 0.316722    ( -0.0467146   0.0567106 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          33.20 using 59 PHA bins.
# Reduced chi-squared =         0.5929 for     56 degrees of freedom 
# Null hypothesis probability =   9.934203e-01
 
Photon flux (15-150 keV)    in 1 sec: 21.2201 ( -0.5366  0.5379 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.59049e-07 ( 0  0 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 33.492 sec.
Hardness ratio (energy fluence ratio) = 1.54895932502

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

S(15-50 keV)  = 7.229897e-06
S(50-150 keV) = 1.3591102e-05

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 = 5.254311877774777E-01, IMY = 4.514434742871043E-02

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:
-29.515400 -14.548000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.1617  41.0619    5.1  49.6  148.8   0.5014   2.3    7.0	Cyg X-3                       
325.9505  38.3473  481.1  35.7  149.9   0.0017   0.0   10.5	Cyg X-2                       
332.3918  69.1870    2.2  52.1 -171.2   0.5771   5.3 ------	UNKNOWN                       
 34.9927  17.3658    2.1  31.7  -69.0   0.3402   5.4 ------	UNKNOWN                       

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

Time interval of the image:
-14.548000 15.484600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.0372  41.1359   10.4  49.7  149.0  -1.2872  -1.1   11.5	Cyg X-3                       
326.0181  38.2684    4.3  35.6  149.9  -1.0566  -2.7    7.9	Cyg X-2                       
314.4076  37.7232    2.5  44.3  145.4   3.3237   4.6 ------	UNKNOWN                       
 13.6617  -4.9528    0.1  27.8   -4.9  24.9090 107.1 ------	UNKNOWN                       
 24.8183  65.2217    2.5  47.5 -145.5   2.4704   4.6 ------	UNKNOWN                       
 38.2859  63.6808    4.0  50.0 -138.2   2.5805   2.9 ------	UNKNOWN                       
 40.3248  65.8507    2.9  52.1 -139.5   4.4838   4.0 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
64.684650 962.958400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
332.5155  29.9140    2.5  52.6  161.7  11.4471   4.7 ------	UNKNOWN                       
 22.1098   5.6994    2.7  13.6 -114.0   2.1774   4.2 ------	UNKNOWN                       
 61.8494 -33.4955    3.3  53.0  -23.5   4.8090   3.5 ------	UNKNOWN                       
  7.7603  52.6775    6.0  57.9 -156.7   7.5050   1.9 ------	UNKNOWN                       
 47.9443  18.6381    5.8  41.2  -98.3   6.2267   2.0 ------	UNKNOWN                       
 36.8315  37.3061    5.6  47.5 -127.3   5.6600   2.1 ------	UNKNOWN