batgrbproduct analysis for trigger=720568

batgrbproduct Analysis for Trigger=720568

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): Sun Dec  4 22:29:22 EST 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger720568
======================================================================

  Trigger: 00720568      Segment: 000

  BAT Trigger Time: 499945363.984   [s; MET]
      Trigger Stop: 499945364.048   [s; MET]
               UTC: 2016-11-04T09:42:26.875480    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 77.8806169009489   Dec: -51.4523657373836  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.2
     Image Trigger?:     NO
     Rate S/N Ratio:     27.258026340878  [ if not an image trigger ]
     Image S/N Ratio:    9.2

  Flight Position:   [ source = BAT ]
    RA: 77.8806169009489   Dec: -51.4523657373836  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 77.9030526857047   Dec: -51.4487398548717  [deg; J2000]  
        { 05h 11m 36.7s , -51d 26' 55.5" }
         +/- 1.78147768819737 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.898964149695442 [arcmin] (formal 1-sigma fit error)
    SNR: 13.330937232487
 
  Angular difference between Flight and Ground position is 0.866655 arcmin
 
  Partial Coding Fraction: 0.9921875    [ including projection effects ]

  Duration
     T90: 0.0999999642372131 +/- 0.0178885267601734
        Measured from: -0.0120000243186951
                   to: 0.0879999399185181     [s; relative to TRIGTIME]
     T50: 0.043999969959259 +/- 0.0178885267601734
        Measured from: 0.0119999647140503
                   to: 0.0559999346733093     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.456000030040741     
                   to: 0.543999969959259     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0160000324249268     
                   to: 0.0999999642372131     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.012951   0.024277   0.022909   0.007942
           0.002427   0.002906   0.002901   0.001998 [error]
 Peak      0.017723   0.028626   0.021330   0.005245
           0.005477   0.006068   0.005267   0.004294 [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 3.72e-09 8.57e-09 1.57e-08 6.77e-08 4.25e-08 9.56e-08   erg/cm2
              Error 8.71e-10 1.23e-09 2.47e-09 2.35e-08 6.34e-09 2.52e-08   erg/cm2
Peak flux Power-law 1.66e-01 1.89e-01 1.54e-01 2.10e-01 5.86e-01 7.20e-01   ph/cm2/s
              Error 6.54e-02 4.59e-02 4.23e-02 1.23e-01 1.30e-01 1.70e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.58e-09 8.75e-09 1.60e-08 5.13e-08 4.21e-08 7.96e-08   erg/cm2
              Error 1.02e-09 1.41e-09 2.86e-09 2.76e-08 6.52e-09 3.44e-08   erg/cm2
Peak flux Cutoff-PL 1.67e-01 1.88e-01 1.54e-01 2.19e-01 5.87e-01 7.31e-01   ph/cm2/s
              Error 5.64e-02 5.07e-02 4.57e-02 -------- 1.32e-01 2.00e-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    1.135    0.220    -      -           3.54e-02 4.59e-03   60.260 57
CPL   0.938    0.738     297.1    0.0      4.39e-02 4.46e-02   60.080 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.294    0.394    -      -           4.92e-03 1.09e-03   57.900 57
CPL   1.290    2.070    9998.0    0.0      4.94e-03 1.35e-02   57.900 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: 0.064000 sec.
T50 in the 50-300 keV band: 0.064000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.116   -0.016    0.100
T90     0.100   -0.012    0.088
T50     0.044    0.012    0.056
Peak    1.000   -0.456    0.544

Click here for the BAT GCN circular template

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

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
   77.9031   -51.4487   0.0145    13.0205  -142.1228         0.0680245     13.331 TRIG_00720568                 
 
Foreground time interval of the image:
 -0.016   0.100 (delta_t =   0.116 [sec])
Background time interval of the image:
-239.984  -0.016 (delta_t = 239.968 [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 0.064000

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 0.064000

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 0.064000

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   -0.016 sec. to    0.100 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13516     ( -0.220442   0.219633 )
Norm@50keV  : 3.53978E-02    ( -0.00459462   0.00458888 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.26 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     57 degrees of freedom 
# Null hypothesis probability =   3.588421e-01
 
Photon flux (15-150 keV)    in 0.116 sec: 4.12103 ( -0.53778  0.53805 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.24656e-08 ( -6.31316e-09  6.36451e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.016 sec. to    0.100 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.937747     ( -0.922177   0.553148 )
Epeak [keV] : 297.134      ( -297.119 -297.119 )
Norm@50keV  : 4.38772E-02    ( -0.0192453   0.0699647 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.08 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     56 degrees of freedom 
# Null hypothesis probability =   3.302399e-01
 
Photon flux (15-150 keV)    in 0.116 sec: 1.63711 ( -0.5448  0.3203 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.21248e-08 ( -6.55039e-09  6.49776e-09 ) ergs/cm2

Band function

Time interval is from   -0.016 sec. to    0.100 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]    : 20.2641  (-3.31177  4.12741)
R^2/D10^2   : 0.189024  (-0.084133   0.145745)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.10 using 59 PHA bins.
# Reduced chi-squared =          1.265 for     57 degrees of freedom 
# Null hypothesis probability =   8.587376e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.727e-09   4.871e-10
25- 50  8.675e-09   1.827e-09
50-150  2.645e-08   6.177e-09
15-150  3.686e-08   7.204e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-37.3735      -200)
Norm        : 16.3774       (-2.19796     2.19796)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.58 using 59 PHA bins.
# Reduced chi-squared =          1.221 for     57 degrees of freedom 
# Null hypothesis probability =   1.224859e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.760e-09   2.724e-09
25- 50  9.156e-09   5.141e-09
50-150  2.008e-08   1.121e-08
15-150  3.400e-08   1.919e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.17769        (-2.39805      3.8568)
R1^2/D10^2  : 8.92659        (-7.64397      149.978)
kT2 [keV]   : 26.7409        (-5.81473      11.55)
R2^2/D10^2  : 7.05818E-02    (-0.0487331   0.0921282)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.06 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     55 degrees of freedom 
# Null hypothesis probability =   3.295483e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.870e-09   2.033e-09
25- 50  7.803e-09   3.292e-09
50-150  3.019e-08   1.357e-08
15-150  4.187e-08   1.676e-08

Peak spectrum fit

Power-law model

Time interval is from   -0.456 sec. to    0.544 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29364     ( -0.395609   0.392605 )
Norm@50keV  : 4.92009E-03    ( -0.00109806   0.00109045 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.90 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     57 degrees of freedom 
# Null hypothesis probability =   4.418647e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.586304 ( -0.129934  0.130106 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.87012e-08 ( -1.22728e-08  1.25169e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.456 sec. to    0.544 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.29004     ( -1.54684   2.59393 )
Epeak [keV] : 9998.02      ( -9998.29 -9998.29 )
Norm@50keV  : 4.94105E-03    ( -0.0010957   0.0258074 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.90 using 59 PHA bins.
# Reduced chi-squared =          1.034 for     56 degrees of freedom 
# Null hypothesis probability =   4.049926e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.587162 ( -0.133835  0.130161 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.8745e-08 ( -1.32906e-08  1.07157e-08 ) ergs/cm2

Band function

Time interval is from   -0.456 sec. to    0.544 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]    : 16.9076  (-4.59689  7.08144)
R^2/D10^2   : 4.55879E-02  (-0.0311545   0.0874576)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.58 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     57 degrees of freedom 
# Null hypothesis probability =   2.558082e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.658e-09   1.303e-09
25- 50  1.171e-08   5.518e-09
50-150  2.386e-08   1.289e-08
15-150  3.823e-08   1.673e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-93.447      -199.363)
Norm        : 2.39878       (-0.531943     0.531943)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.20 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     57 degrees of freedom 
# Null hypothesis probability =   3.952699e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.973e-09   3.536e-09
25- 50  1.149e-08   6.750e-09
50-150  2.520e-08   1.478e-08
15-150  4.266e-08   2.494e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.77545        (-6.77833      8.33616)
R1^2/D10^2  : 0.619649        (-0.55999      90.9232)
kT2 [keV]   : 30.0258        (-13.4211      -30.0517)
R2^2/D10^2  : 5.77659E-03    (-0.00571089   0.0387807)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.19 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     55 degrees of freedom 
# Null hypothesis probability =   3.586236e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.227e-09   3.118e-09
25- 50  1.069e-08   5.800e-09
50-150  3.282e-08   1.901e-08
15-150  4.874e-08   2.660e-08

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: 1.13516     ( -0.220442   0.219633 )
Norm@50keV  : 3.53978E-02    ( -0.00459462   0.00458888 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.26 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     57 degrees of freedom 
# Null hypothesis probability =   3.588421e-01
 
Photon flux (15-150 keV)    in 0.116 sec: 4.12102 ( -0.537762  0.53804 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.24623e-08 ( -6.31329e-09  6.3647e-09 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.937750     ( -0.922177   0.553148 )
Epeak [keV] : 297.137      ( -297.119 -297.119 )
Norm@50keV  : 4.38771E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.08 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     56 degrees of freedom 
# Null hypothesis probability =   3.302399e-01
 
Photon flux (15-150 keV)    in 0.116 sec: 4.10023 ( -0.54272  0.53059 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.21435e-08 ( -6.55388e-09  6.50551e-09 ) 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)  = 8.57e-09
S(50-100 keV) = 1.57e-08

T90 vs. Hardness ratio plot

T90                                   = 0.0999999642372131 sec.
Hardness ratio (energy fluence ratio) = 1.83197

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.87453
Count Ratio (50-100 keV) / (15-25 keV) = 1.7689

Mask shadow pattern

IMX = -1.825277241681918E-01, IMY = 1.419771635243132E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.064000

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:
-239.984000 -0.016000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5084 -40.6003    3.4  53.3 -142.9   3.9553   3.4    2.9	Vela X-1                      
 37.0915 -17.5634    2.6  35.0   66.9   1.7765   4.5 ------	UNKNOWN                       
 48.8785 -25.9715    2.9  23.1   81.7   0.9839   4.1 ------	UNKNOWN                       
351.4681 -51.6341    3.4  42.0  -16.9   0.8678   3.4 ------	UNKNOWN                       
116.1828 -36.5971    2.0  43.1 -158.7   1.9799   5.7 ------	UNKNOWN                       
331.6733 -40.7188    2.8  59.3  -13.9   4.7258   4.1 ------	UNKNOWN                       
135.8689 -41.1904    2.8  53.2 -142.1   4.3782   4.2 ------	UNKNOWN

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

Time interval of the image:
-0.016000 0.100000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6428 -40.7572    4.0  53.3 -142.6   0.0764   2.9   13.2	Vela X-1                      
 77.9031 -51.4487    0.9  13.0 -142.1   0.0680  13.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
46.716610 302.346000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6078 -40.5604    3.5  40.4 -134.1   1.3078   3.3    3.6	Vela X-1

Plot creation:
Sun Dec  4 22:38:04 EST 2016