GRB171007A

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: Thu Oct 19 18:44:10 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger777215
======================================================================

  Trigger: 00777215      Segment: 000

  BAT Trigger Time: 529070278.08   [s; MET]
      Trigger Stop: 529070280.128   [s; MET]
               UTC: 2017-10-07T11:57:38.277120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 135.543621795884   Dec: 42.8493348720254  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.18
     Image Trigger?:     NO
     Rate S/N Ratio:     13.6747943311773  [ if not an image trigger ]
     Image S/N Ratio:    8.18

  Analysis Position:   [ source = BAT ]
    RA: 135.543621795884   Dec: 42.8493348720254  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 135.544   Dec: 42.8493  [deg; J2000]
        { 09h 02m 10.6s , +42d 50' 57.5" }
        +/- 2.32874993422 [arcmin] (estimated 90% radius based on SNR)
    SNR: 9.09314204559
 
 
  Angular difference between the analysis and refined position is 0.016768 arcmin
 
  Partial Coding Fraction: 1.03125    [ including projection effects ]

  Duration
     T90: 68.4239999651909 +/- 19.3288518403932
        Measured from: 0.480000019073486
                   to: 68.9039999842644     [s; relative to TRIGTIME]
     T50: 46.1679999232292 +/- 28.6269932006757
        Measured from: 1.95200002193451
                   to: 48.1199999451637     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.452000021934509     
                   to: 1.45200002193451     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.155999958515167     
                   to: 83.3479999899864     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.101361   0.197096   0.100734   0.028823
           0.045752   0.047675   0.042276   0.038092 [error]
 Peak      0.011085   0.026117   0.026586   0.011561
           0.005169   0.005470   0.005128   0.004523 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   83.504   -0.156   83.348
T90    68.424    0.480   68.904
T50    46.168    1.952   48.120
Peak    1.000    0.452    1.452
 
 
====== 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: 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      -1.351    -0.481      0.486       -           -               -         3.24e-04     -1.06e-04          1.05e-04      79.250   57
CPL      1.672    -2.052     -1.672       56.473     -14.314        27.756      1.19e-02     -1.19e-02          2.19e+02      73.720   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      -0.927     -0.368     0.397       -           -               -         4.79e-03     -1.05e-03          1.04e-03      65.790   57
CPL     -0.291     -0.967     2.260      148.928    -148.928      -148.928      9.39e-03     -5.48e-03          7.69e-02      65.320   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   3.00e-08  6.05e-08  9.50e-08  3.30e-07  2.64e-07  5.15e-07   erg/cm2
      90%_error_low -1.38e-08 -2.02e-08 -3.69e-08 -1.98e-07 -9.27e-08 -2.41e-07   erg/cm2
      90%_error_hi   1.56e-08  2.01e-08  3.77e-08  3.36e-07  9.66e-08  3.57e-07   erg/cm2
Peak flux       PL   1.14e-01  1.62e-01  1.70e-01  3.31e-01  5.50e-01  7.77e-01   ph/cm2/s
      90%_error_low -4.70e-02 -4.48e-02 -3.96e-02 -1.40e-01 -1.20e-01 -1.82e-01   ph/cm2/s
      90%_error_hi   5.48e-02  4.35e-02  3.91e-02  2.00e-01  1.20e-01  2.01e-01   ph/cm2/s
 
Fluence        CPL   1.57e-08  8.65e-08  9.38e-08  8.91e-09  2.05e-07  2.05e-07   erg/cm2
      90%_error_low -1.38e-08 -2.96e-08 -5.01e-08    N/A    -7.23e-08 -7.27e-08   erg/cm2
      90%_error_hi   1.92e-08  3.12e-08  5.26e-08    N/A     9.36e-08  1.17e-07   erg/cm2
Peak flux      CPL   9.80e-02  1.68e-01  1.82e-01  1.74e-01  5.36e-01  6.23e-01   ph/cm2/s
      90%_error_low -5.83e-02 -4.90e-02 -4.70e-02 -1.74e-01 -1.27e-01 -1.97e-01   ph/cm2/s
      90%_error_hi   6.58e-02  5.12e-02  5.03e-02  2.08e-01  1.26e-01  2.53e-01   ph/cm2/s
 
======================================================================

Special notes of this burst

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   -0.156 sec. to   83.348 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.35148     ( -0.485282   0.481681 )
Norm@50keV  : 3.24044E-04    ( -0.000105834   0.000105353 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.25 using 59 PHA bins.
# Reduced chi-squared =          1.390 for     57 degrees of freedom 
# Null hypothesis probability =   2.731207e-02
 
Photon flux (15-150 keV)    in 83.5 sec: 3.90401E-02 ( -0.0125265  0.0126071 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.64476e-07 ( -9.27184e-08  9.66396e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.156 sec. to   83.348 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.25996     ( -3.89855   -3.51879 )
Epeak [keV] : 52.7195      ( -10.2908 31.7793 )
Norm@50keV  : 8.02692E-02    ( -0.0772621   219.17 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.27 using 59 PHA bins.
# Reduced chi-squared =          1.308 for     56 degrees of freedom 
# Null hypothesis probability =   6.053977e-02
 
Photon flux (15-150 keV)    in 83.5 sec: 3.45320E-02 ( -0.0125957  0.0128289 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04558e-07 ( -7.23111e-08  9.36478e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.452 sec. to    1.452 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.926946     ( -0.367905   0.397051 )
Norm@50keV  : 4.79374E-03    ( -0.00104575   0.001037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.79 using 59 PHA bins.
# Reduced chi-squared =          1.154 for     57 degrees of freedom 
# Null hypothesis probability =   1.987962e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.550424 ( -0.11999  0.120498 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.32513e-08 ( -1.24062e-08  1.25948e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.452 sec. to    1.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.290651     ( -0.966731   2.26028 )
Epeak [keV] : 148.928      ( -148.954 -148.954 )
Norm@50keV  : 9.38672E-03    ( -0.00547917   0.0769161 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.32 using 59 PHA bins.
# Reduced chi-squared =          1.166 for     56 degrees of freedom 
# Null hypothesis probability =   1.845628e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.535788 ( -0.127259  0.125835 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.09988e-08 ( -1.40806e-08  1.37706e-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 = 1.756683852061149E-01, IMY = 2.862029514155098E-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:
-239.080000 -0.156000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 99.6957  28.7271    2.4  37.6   41.9   1.6797   4.7 ------	UNKNOWN                       
110.9178   1.9867    3.1  55.9   10.7   4.0334   3.7 ------	UNKNOWN                       
278.6078  66.5603    2.5  56.8  173.9   5.2825   4.6 ------	UNKNOWN                       
125.2458  48.7833    2.4   9.6   47.1   0.8648   4.8 ------	UNKNOWN                       
222.4781  53.5155    2.5  47.0 -150.3   2.1715   4.7 ------	UNKNOWN                       
150.9208   3.1208    3.0  50.6  -39.4   3.3309   3.9 ------	UNKNOWN

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

Time interval of the image:
-0.156000 26.420600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']

Post-slew image of 15-350 keV band

Time interval of the image:
57.820610 963.038900
1833.920000 2000.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
110.6163   9.4892    3.1  39.8   13.4   3.3594   3.7 ------	UNKNOWN                       
117.7987  17.0442    3.2  29.9    8.7   2.2865   3.7 ------	UNKNOWN                       
210.5680  64.2392    2.6  46.0 -171.4   5.6770   4.3 ------	UNKNOWN                       
187.2502  29.5535    2.9  43.1 -116.7  10.5512   3.9 ------	UNKNOWN                       
152.4612  -3.0090    2.5  48.3  -50.0  14.6864   4.7 ------	UNKNOWN

Analysis Summary

Notes:

Image

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