batgrbproduct analysis for trigger=682269

batgrbproduct Analysis for Trigger=682269

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): Fri Jun  3 17:05:03 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/scripts
======================================================================

  Trigger: 00682269      Segment: 000

  BAT Trigger Time: 481957804.16   [s; MET]
      Trigger Stop: 481957804.416   [s; MET]
               UTC: 2016-04-10T05:09:48.056060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 150.68072928178   Dec: 3.44358286327285  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.07
     Image Trigger?:     NO
     Rate S/N Ratio:     55.0726792520575  [ if not an image trigger ]
     Image S/N Ratio:    9.07

  Flight Position:   [ source = BAT ]
    RA: 150.68072928178   Dec: 3.44358286327285  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 150.709641740265   Dec: 3.44551357729276  [deg; J2000]  
        { 10h 02m 50.3s , +03d 26' 43.8" }
         +/- 2.1684313082 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.10189740841201 [arcmin] (formal 1-sigma fit error)
    SNR: 10.0672367343468
 
  Angular difference between Flight and Ground position is 1.735484 arcmin
 
  Partial Coding Fraction: 0.3789062    [ including projection effects ]

  Duration
     T90: 96 +/- 50.5964425626941
        Measured from: -15.160000026226
                   to: 80.839999973774     [s; relative to TRIGTIME]
     T50: 32 +/- 16
        Measured from: -15.160000026226
                   to: 16.839999973774     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.33999997377396     
                   to: 9.33999997377396     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -15.160000026226     
                   to: 112.839999973774     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.349837   0.477759   0.587998   0.130462
           0.077945   0.081874   0.073368   0.066829 [error]
 Peak      0.009618   0.010493   0.017626   0.007900
           0.009014   0.009686   0.008696   0.007686 [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 9.75e-08 2.28e-07 4.25e-07 1.89e-06 1.15e-06 2.65e-06   erg/cm2
              Error 3.13e-08 4.25e-08 7.09e-08 7.72e-07 1.83e-07 8.00e-07   erg/cm2
Peak flux Power-law 8.17e-02 1.07e-01 1.02e-01 1.74e-01 3.49e-01 4.65e-01   ph/cm2/s
              Error 9.97e-02 8.32e-02 8.08e-02 2.53e-01 2.23e-01 3.92e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.74e-08 2.28e-07 4.21e-07 1.98e-06 1.15e-06 2.64e-06   erg/cm2
              Error -------- -------- 8.19e-08 -------- 1.94e-07 9.15e-07   erg/cm2
Peak flux Cutoff-PL 6.32e-02 1.15e-01 1.18e-01 7.69e-02 3.43e-01 3.73e-01   ph/cm2/s
              Error 9.43e-02 1.01e-01 1.04e-01 1.19e-01 2.19e-01 2.57e-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    1.106    0.283    -      -           8.62e-04 1.29e-04   64.890 57
CPL   2.096    1.144      34.8    0.0      1.89e-04 0.00e+00   63.860 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.062    1.155    -      -           3.02e-03 2.42e-03   53.350 57
CPL   0.004    3.797     108.2    0.0      9.09e-03 3.56e+02   53.140 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: 6.656000 sec.
T50 in the 50-300 keV band: 1.536000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  128.000  -15.160  112.840
T90    96.000  -15.160   80.840
T50    32.000  -15.160   16.840
Peak    1.000    8.340    9.340

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
  150.7096     3.4455   0.0191    36.7529   148.8867         1.0276269     10.067 TRIG_00682269                 
 
Foreground time interval of the image:
-15.160   9.741 (delta_t =  24.901 [sec])
Background time interval of the image:
-239.160 -15.160 (delta_t = 224.000 [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

8 ms binning

From T100_start-3 s to T100_start+3 s

2 ms binning

From T100_start-1 s to T100_start+1 s

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  -15.160 sec. to  112.840 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.10617     ( -0.287645   0.277808 )
Norm@50keV  : 8.62391E-04    ( -0.000129296   0.000128435 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.89 using 59 PHA bins.
# Reduced chi-squared =          1.138 for     57 degrees of freedom 
# Null hypothesis probability =   2.209705e-01
 
Photon flux (15-150 keV)    in 128 sec: 0.100092 ( -0.0156364  0.015735 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15197e-06 ( -1.82529e-07  1.83583e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -15.160 sec. to  112.840 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.09635     ( -1.74566   0.541901 )
Epeak [keV] : 34.7861      (   )
Norm@50keV  : 1.89117E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.86 using 59 PHA bins.
# Reduced chi-squared =          1.140 for     56 degrees of freedom 
# Null hypothesis probability =   2.198788e-01
 
Photon flux (15-150 keV)    in 128 sec: 0.100609 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.15486e-06 ( -1.96146e-07  1.91277e-07 ) ergs/cm2

Band function

Time interval is from  -15.160 sec. to  112.840 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.920554   ( 0.920554   0.920554 )
beta        : -1.10619    ( -0.277605   0.287659 )
Epeak [keV] : 43.7648      ( -43.7647 -43.7647 )
Norm@50keV   : 1.47566E-03    ( -0.000740482   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.89 using 59 PHA bins.
# Reduced chi-squared =          1.180 for     55 degrees of freedom 
# Null hypothesis probability =   1.699953e-01
 
Photon flux (15-150 keV)    in 128 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]    : 23.7691  (-4.42636  6.04219)
R^2/D10^2   : 2.68381E-03  (-0.00135035   0.0024962)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.97 using 59 PHA bins.
# Reduced chi-squared =          1.298 for     57 degrees of freedom 
# Null hypothesis probability =   6.478581e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.461e-08   1.331e-08
25- 50  1.912e-07   5.025e-08
50-150  8.054e-07   2.494e-07
15-150  1.031e-06   2.632e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-42.9996      -200)
Norm        : 0.420302       (-0.0638807     0.0638807)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.23 using 59 PHA bins.
# Reduced chi-squared =          1.285 for     57 degrees of freedom 
# Null hypothesis probability =   7.252248e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.341e-07   7.661e-08
25- 50  2.579e-07   1.446e-07
50-150  5.655e-07   3.126e-07
15-150  9.575e-07   5.366e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.72799        (-1.67269      3.14049)
R1^2/D10^2  : 7.23952        (-7.25011      46497.8)
kT2 [keV]   : 27.0088        (-5.59088      8.97891)
R2^2/D10^2  : 1.73727E-03    (-0.00101227   0.00189705)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.86 using 59 PHA bins.
# Reduced chi-squared =          1.107 for     55 degrees of freedom 
# Null hypothesis probability =   2.731932e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.206e-07   5.740e-08
25- 50  1.688e-07   6.024e-08
50-150  8.478e-07   2.802e-07
15-150  1.137e-06   3.192e-07

Peak spectrum fit

Power-law model

Time interval is from    8.340 sec. to    9.340 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06187     ( -1.37306   0.936971 )
Norm@50keV  : 3.01668E-03    ( -0.00301679   0.00183132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.35 using 59 PHA bins.
# Reduced chi-squared =         0.9360 for     57 degrees of freedom 
# Null hypothesis probability =   6.126143e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.348753 ( -0.217917  0.228926 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.19374e-08 ( -1.84132e-08  1.84974e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    8.340 sec. to    9.340 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.27357E-03     ( -0.00494824   7.5886 )
Epeak [keV] : 108.227      ( -108.225 -108.225 )
Norm@50keV  : 9.09143E-03    ( -0.00908978   711.039 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.14 using 59 PHA bins.
# Reduced chi-squared =         0.9489 for     56 degrees of freedom 
# Null hypothesis probability =   5.839199e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.342949 ( -0.209239  0.229127 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.12795e-08 ( -2.05769e-08  1.81459e-08 ) ergs/cm2

Band function

Time interval is from    8.340 sec. to    9.340 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.47496   ( -0.0809734   -0.0809734 )
beta        : -1.72149    ( 1.36569   1.36569 )
Epeak [keV] : 67.3540      ( -67.7025 386.041 )
Norm@50keV   : 5.35244E-02    ( -0.0542747   18.7136 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.89 using 59 PHA bins.
# Reduced chi-squared =         0.9616 for     55 degrees of freedom 
# Null hypothesis probability =   5.558396e-01
 
Photon flux (15-150 keV)    in 1 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]    : 20.8101  (-10.35  55.172)
R^2/D10^2   : 1.56533E-02  (-0.0156367   0.137729)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.38 using 59 PHA bins.
# Reduced chi-squared =         0.9365 for     57 degrees of freedom 
# Null hypothesis probability =   6.116523e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.286e-09   9.130e-10
25- 50  6.571e-09   4.485e-09
50-150  2.119e-08   1.397e-08
15-150  2.905e-08   1.983e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-199.363      -199.363)
Norm        : 1.54447       (-0.929653     0.929653)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.12 using 59 PHA bins.
# Reduced chi-squared =         0.9494 for     57 degrees of freedom 
# Null hypothesis probability =   5.839636e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.846e-09   2.894e-09
25- 50  7.398e-09   5.050e-09
50-150  1.623e-08   1.115e-08
15-150  2.747e-08   1.936e-08

Double BB

R1^2/D10^2  : 4.57470E-05        (-4.5747e-05      -4.5747e-05)
kT2 [keV]   : 14.2684        (-10.9466      41.9619)
R2^2/D10^2  : 4.35273E-02    (-0.0412395   -0.0435273)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.94 using 59 PHA bins.
#Fit statistic : Chi-Squared =          52.88 using 59 PHA bins.
#Fit statistic : Chi-Squared =          52.86 using 59 PHA bins.
# Reduced chi-squared =         0.9625 for     55 degrees of freedom 
# Reduced chi-squared =         0.9615 for     55 degrees of freedom 
# Reduced chi-squared =         0.9612 for     55 degrees of freedom 
# Null hypothesis probability =   5.538017e-01
# Null hypothesis probability =   5.559846e-01
# Null hypothesis probability =   5.566608e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.949e-09   1.882e-09
25- 50  7.360e-09   8.485e-09
50-150  2.228e-08   2.240e-08
15-150  3.159e-08   2.958e-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: 0.991041     ( -0.247261   0.236525 )
Norm@50keV  : 2.98717E-03    ( -0.000417926   0.000413274 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.85 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     57 degrees of freedom 
# Null hypothesis probability =   4.436053e-01
 
Photon flux (15-150 keV)    in 24.9 sec: 0.344057 ( -0.0491551  0.0489392 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.06304e-07 ( -1.12546e-07  1.14012e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.295417     ( -1.2697   0.797752 )
Epeak [keV] : 151.801      ( -60.5444 -151.793 )
Norm@50keV  : 5.71678E-03    ( -0.00299414   0.0112871 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.44 using 59 PHA bins.
# Reduced chi-squared =          1.008 for     56 degrees of freedom 
# Null hypothesis probability =   4.582962e-01
 
Photon flux (15-150 keV)    in 24.9 sec: 0.331189 ( -0.051049  0.052353 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.88165e-07 ( -1.18863e-07  1.18058e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.298748   ( -0.611183   1.31215 )
beta        : -10.0000    ( 10   10 )
Epeak [keV] : 151.774      ( -60.6919 193.04 )
Norm@50keV   : 5.71441E-03    ( -0.00298677   0.0113036 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.44 using 59 PHA bins.
# Reduced chi-squared =          1.026 for     55 degrees of freedom 
# Null hypothesis probability =   4.207887e-01
 
Photon flux (15-150 keV)    in 24.9 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)  = 2.28e-07
S(50-100 keV) = 4.25e-07

T90 vs. Hardness ratio plot

T90                                   = 96 sec.
Hardness ratio (energy fluence ratio) = 1.86404

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.36566
Count Ratio (50-100 keV) / (15-25 keV) = 1.68078

Mask shadow pattern

IMX = -6.393836340852224E-01, IMY = -3.859028865711088E-01

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-239.160000 -15.160000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
147.3434  -8.4946    2.6  49.0  151.4   3.2683   4.5 ------	UNKNOWN                       
222.0955  41.3170    2.6  49.0   25.8   2.6156   4.5 ------	UNKNOWN                       
165.9325  65.8878    2.6  26.6  -30.7   0.8565   4.5 ------	UNKNOWN

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

Time interval of the image:
-15.160000 9.740600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
150.7096   3.4455    1.1  36.8  148.9   1.0275  10.1 ------	UNKNOWN                       
250.3594  70.1454    2.2  54.3  -15.2   0.8618   5.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
71.740600 483.120000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5390 -40.5682    1.2  46.2 -177.5   3.8382   9.5    0.9	Vela X-1                      
179.4635  26.3619    2.2  35.8   34.0   1.6089   5.2 ------	UNKNOWN                       
131.7887 -21.6108    2.8  31.2 -157.9   0.9995   4.1 ------	UNKNOWN                       
132.5817  28.4324    2.1  30.3  -46.2   1.4230   5.5 ------	UNKNOWN                       
109.0034 -40.2077    3.7  58.0 -156.7   4.1751   3.2 ------	UNKNOWN                       
116.9801  18.0305    3.4  36.1  -77.1   1.7662   3.4 ------	UNKNOWN

Plot creation:
Fri Jun  3 17:24:28 EDT 2016