batgrbproduct analysis for trigger=758766

batgrbproduct Analysis for Trigger=758766

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 (local time): Mon Jul 10 16:04:16 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger758766
======================================================================

  Trigger: 00758766      Segment: 000

  BAT Trigger Time: 520162662.4   [s; MET]
      Trigger Stop: 520162663.424   [s; MET]
               UTC: 2017-06-26T09:37:23.124540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 165.414032854002   Dec: 56.469149639052  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    26.2
     Image Trigger?:     NO
     Rate S/N Ratio:     255.998046867549  [ if not an image trigger ]
     Image S/N Ratio:    26.2

  Flight Position:   [ source = BAT ]
    RA: 165.414032854002   Dec: 56.469149639052  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 165.407454415803   Dec: 56.47902475265  [deg; J2000]  
        { 11h 01m 37.8s , +56d 28' 44.5" }
         +/- 0.494911383654722 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.111162804471789 [arcmin] (formal 1-sigma fit error)
    SNR: 83.0821538277952
 
  Angular difference between Flight and Ground position is 0.631339 arcmin
 
  Partial Coding Fraction: 0.96875    [ including projection effects ]

  Duration
     T90: 12.9479999542236 +/- 0.346594812827857
        Measured from: -1.23600000143051
                   to: 11.7119999527931     [s; relative to TRIGTIME]
     T50: 6.93999999761581 +/- 0.167904758511362
        Measured from: 0.555999994277954
                   to: 7.49599999189377     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0639999508857727     
                   to: 0.936000049114227     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.3439999818802     
                   to: 17.9240000247955     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.945277   5.513868   3.834443   0.768180
           0.050369   0.055965   0.050207   0.041409 [error]
 Peak      0.631920   1.157723   0.978048   0.214048
           0.014553   0.019017   0.018297   0.011193 [error]

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

======================================================================
 
=== 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   Power-law 1.26e-06 2.18e-06 2.87e-06 7.70e-06 8.40e-06 1.40e-05   erg/cm2
              Error 4.57e-08 4.52e-08 5.83e-08 3.66e-07 1.45e-07 3.89e-07   erg/cm2
Peak flux Power-law 1.98e-03 2.43e-02 2.73e-01 2.49e+01 6.39e-01 2.35e+01   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s
 
Fluence   Cutoff-PL 1.15e-06 2.20e-06 2.95e-06 5.07e-06 8.21e-06 1.14e-05   erg/cm2
              Error 6.11e-08 4.78e-08 6.70e-08 8.05e-07 1.64e-07 8.21e-07   erg/cm2
Peak flux Cutoff-PL 5.51e+00 7.86e+00 6.76e+00 4.71e+00 2.28e+01 2.48e+01   ph/cm2/s
              Error 3.67e-01 2.22e-01 1.97e-01 6.28e-01 5.78e-01 8.73e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.602    0.033    -      -           2.28e-02 3.90e-04   69.820 57
CPL   1.256    0.141     120.9   31.1      3.25e-02 4.59e-03   51.110 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.284    0.038    -      -           1.98e-01 4.35e-03  101.130 57
CPL   0.574    0.175     113.9   15.4      4.13e-01 7.34e-02   45.930 56
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^-{Ph_index} (minus sign is not included in the 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 PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedom

 
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
 
T90 in the 50-300 keV band: 12.736000 sec.
T50 in the 50-300 keV band: 5.568000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   39.268  -21.344   17.924
T90    12.948   -1.236   11.712
T50     6.940    0.556    7.496
Peak    1.000   -0.064    0.936

Click here for the BAT GCN circular template

Special notes of this burst

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  165.4075    56.4790   0.0023     8.8308    79.2831        14.2750048     83.082 TRIG_00758766                 
 
Foreground time interval of the image:
-21.344  15.701 (delta_t =  37.045 [sec])
Background time interval of the image:
-240.099 -21.344 (delta_t = 218.755 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

1 s binning

From T0-310 s to T0+310 s

From T100_start - 20 s to T100_end + 30 s

Full time interval

64 ms binning

Full time interval

From T100_start to T100_end

From T0-5 sec to T0+5 sec

16 ms binning

From T100_start-5 s to T100_start+5 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

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  -21.344 sec. to   17.924 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60178     ( -0.0331262   0.0331147 )
Norm@50keV  : 2.28323E-02    ( -0.00038966   0.000389639 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.82 using 59 PHA bins.
# Reduced chi-squared =          1.225 for     57 degrees of freedom 
# Null hypothesis probability =   1.184757e-01
 
Photon flux (15-150 keV)    in 39.27 sec: 2.93577 ( -0.05974  0.05998 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.38477e-06 ( -1.45273e-07  1.45067e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -21.344 sec. to   17.924 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25611     ( -0.143289   0.138998 )
Epeak [keV] : 120.873      ( -19.6144 42.5142 )
Norm@50keV  : 3.24975E-02    ( -0.00420155   0.00498245 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.11 using 59 PHA bins.
# Reduced chi-squared =         0.9127 for     56 degrees of freedom 
# Null hypothesis probability =   6.599583e-01
 
Photon flux (15-150 keV)    in 39.27 sec: 2.84426 ( -0.06837  0.06882 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.18882e-06 ( -1.64447e-07  1.64154e-07 ) ergs/cm2

Band function

Time interval is from  -21.344 sec. to   17.924 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 16.5866  (  )
R^2/D10^2   : 0.216786  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         643.73 using 59 PHA bins.
# Reduced chi-squared =         11.294 for     57 degrees of freedom 
# Null hypothesis probability =  2.861246e-100
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.801e-07   1.669e-08
25- 50  2.082e-06   4.968e-08
50-150  4.057e-06   1.194e-07
15-150  6.619e-06   1.296e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 198.527       (-18.5904      -198.534)
Norm        : 11.7341       (-0.204589     0.242482)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.72 using 59 PHA bins.
# Reduced chi-squared =         0.8898 for     57 degrees of freedom 
# Null hypothesis probability =   7.081782e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.148e-06   2.297e-08
25- 50  2.207e-06   4.673e-08
50-150  4.835e-06   9.228e-08
15-150  8.190e-06   1.689e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.97525        (-0.552788      0.57819)
R1^2/D10^2  : 1.87753        (-0.385953      0.520271)
kT2 [keV]   : 27.6554        (-1.87382      2.30689)
R2^2/D10^2  : 2.72438E-02    (-0.00704604   0.00837826)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.34 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     55 degrees of freedom 
# Null hypothesis probability =   3.885146e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.805e-07   6.597e-08
25- 50  2.273e-06   7.383e-08
50-150  4.827e-06   1.944e-07
15-150  8.080e-06   2.847e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.064 sec. to    0.936 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28424     ( -0.0376994   0.0376683 )
Norm@50keV  : 0.198390    ( -0.00435274   0.00435231 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         101.13 using 59 PHA bins.
# Reduced chi-squared =         1.7742 for     57 degrees of freedom 
# Null hypothesis probability =   2.877827e-04
 
Photon flux (15-150 keV)    in 1 sec: 0.638909 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.96834e-06 ( -4.57353e-08  4.58016e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.064 sec. to    0.936 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.574078     ( -0.17846   0.171915 )
Epeak [keV] : 113.944      ( -12.1454 18.603 )
Norm@50keV  : 0.412998    ( -0.0655989   0.0811096 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.93 using 59 PHA bins.
# Reduced chi-squared =         0.8201 for     56 degrees of freedom 
# Null hypothesis probability =   8.293732e-01
 
Photon flux (15-150 keV)    in 1 sec: 22.7767 ( -0.577  0.5783 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90818e-06 ( -4.89205e-08  4.88163e-08 ) ergs/cm2

Band function

Time interval is from   -0.064 sec. to    0.936 sec.
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 18.6297  (  )
R^2/D10^2   : 1.37222  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         285.92 using 59 PHA bins.
# Reduced chi-squared =         5.0161 for     57 degrees of freedom 
# Null hypothesis probability =   3.278501e-32
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.427e-08   4.040e-09
25- 50  4.471e-07   1.315e-08
50-150  1.136e-06   3.750e-08
15-150  1.677e-06   4.100e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 99.8220       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         226.60 using 59 PHA bins.
# Reduced chi-squared =         3.9754 for     57 degrees of freedom 
# Null hypothesis probability =   4.430286e-22
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.486e-07   5.750e-09
25- 50  4.782e-07   1.085e-08
50-150  1.049e-06   2.250e-08
15-150  1.775e-06   4.100e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.2002        (-1.11413      1.15446)
R1^2/D10^2  : 5.92688        (-1.36412      2.04498)
kT2 [keV]   : 32.5428        (-3.88439      6.04626)
R2^2/D10^2  : 0.152469    (-0.0689748   0.0934832)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.06 using 59 PHA bins.
# Reduced chi-squared =         0.8011 for     55 degrees of freedom 
# Null hypothesis probability =   8.547604e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.504e-07   1.210e-08
25- 50  4.759e-07   2.720e-08
50-150  1.281e-06   1.577e-07
15-150  1.907e-06   1.455e-07

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59686     ( -0.0327946   0.0327803 )
Norm@50keV  : 2.41256E-02    ( -0.000408653   0.000408626 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.50 using 59 PHA bins.
# Reduced chi-squared =          1.149 for     57 degrees of freedom 
# Null hypothesis probability =   2.057152e-01
 
Photon flux (15-150 keV)    in 37.04 sec: 3.09723 ( -0.062636  0.0628799 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.36037e-06 ( -1.43474e-07  1.43518e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25618     ( -0.141571   0.137383 )
Epeak [keV] : 123.049      ( -20.2047 43.9684 )
Norm@50keV  : 3.41308E-02    ( -0.00435364   0.00514973 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.91 using 59 PHA bins.
# Reduced chi-squared =         0.8377 for     56 degrees of freedom 
# Null hypothesis probability =   8.013330e-01
 
Photon flux (15-150 keV)    in 37.04 sec: 3.00188 ( -0.07153  0.07202 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.17506e-06 ( -1.62235e-07  1.61717e-07 ) ergs/cm2

Band function

 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       :    (     )
beta        :     (     )
Epeak [keV] :       (   )
Norm@50keV   :     (     )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in  sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 2.18e-06
S(50-100 keV) = 2.87e-06

T90 vs. Hardness ratio plot

T90                                   = 12.9479999542236 sec.
Hardness ratio (energy fluence ratio) = 1.31651

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.39759
Count Ratio (50-100 keV) / (15-25 keV) = 0.971907

Mask shadow pattern

IMX = 2.889018277273836E-02, IMY = -1.526496343074728E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-240.099410 -21.344000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
265.2522  71.2651    2.3  46.1   31.4   2.8585   5.1 ------	UNKNOWN                       
125.3249  28.3420    3.1  31.8 -127.9   1.2219   3.7 ------	UNKNOWN

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

Time interval of the image:
-21.344000 15.700600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
165.0868  13.6807    2.1  42.6  165.9   1.7382   5.5 ------	UNKNOWN                       
165.4075  56.4790    0.1   8.8   79.3  14.2749  83.1 ------	UNKNOWN                       
 87.8512  46.1226    2.7  39.2  -68.2   2.1054   4.3 ------	UNKNOWN                       
117.0800  19.1761    2.7  43.4 -123.9   2.2811   4.2 ------	UNKNOWN                       
 85.2929  43.3271    2.4  42.4  -69.9   3.8926   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
47.500600 962.696700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
217.2132  34.8456    3.0  40.9  102.5  10.0515   3.8 ------	UNKNOWN                       
231.4073  48.5532    3.1  39.3   75.6   9.7066   3.7 ------	UNKNOWN                       
196.9263  17.0984    2.6  46.0  139.0  11.7826   4.4 ------	UNKNOWN                       
146.6283  77.1041    3.5  21.7   -8.1   2.2116   3.3 ------	UNKNOWN                       
134.2814  71.1746    2.9  19.7  -26.6   2.5391   4.0 ------	UNKNOWN

Plot creation:
Mon Jul 10 16:31:16 EDT 2017