batgrbproduct analysis for trigger=685124

batgrbproduct Analysis for Trigger=685124

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 14:52:41 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/scripts
======================================================================

  Trigger: 00685124      Segment: 000

  BAT Trigger Time: 484083053.568   [s; MET]
      Trigger Stop: 484083057.664   [s; MET]
               UTC: 2016-05-04T19:30:37.347200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 170.043522431995   Dec: 55.9967792055369  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.82
     Image Trigger?:     NO
     Rate S/N Ratio:     13.7840487520902  [ if not an image trigger ]
     Image S/N Ratio:    6.82

  Flight Position:   [ source = BAT ]
    RA: 170.043522431995   Dec: 55.9967792055369  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 170.075790615603   Dec: 55.9963143650939  [deg; J2000]  
        { 11h 20m 18.2s , +55d 59' 46.7" }
         +/- 1.67711271801216 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.612262546738424 [arcmin] (formal 1-sigma fit error)
    SNR: 14.5316578027981
 
  Angular difference between Flight and Ground position is 1.083104 arcmin
 
  Partial Coding Fraction: 0.8828125    [ including projection effects ]

  Duration
     T90: 53.9599999189377 +/- 5.68137024620488
        Measured from: -40.0960000157356
                   to: 13.8639999032021     [s; relative to TRIGTIME]
     T50: 28.0759999155998 +/- 5.86273114821827
        Measured from: -24.4959999918938
                   to: 3.57999992370605     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.507999956607819     
                   to: 1.50799995660782     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -42.3920000195503     
                   to: 16.1959999799728     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.537958   0.499748   0.335631   0.034336
           0.044383   0.046035   0.040050   0.034978 [error]
 Peak      0.025246   0.030330   0.025674   0.011933
           0.006042   0.006409   0.005614   0.004796 [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 1.41e-07 2.17e-07 2.52e-07 5.62e-07 7.73e-07 1.17e-06   erg/cm2
              Error 2.10e-08 2.06e-08 4.01e-08 1.86e-07 9.10e-08 2.23e-07   erg/cm2
Peak flux Power-law 1.95e-01 2.23e-01 1.82e-01 2.49e-01 6.91e-01 8.49e-01   ph/cm2/s
              Error 7.62e-02 5.14e-02 4.65e-02 1.42e-01 1.42e-01 1.85e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.43e-07 2.17e-07 2.51e-07 5.68e-07 5.82e-07 1.17e-06   erg/cm2
              Error 2.10e-08 2.09e-08 5.16e-08 -------- -------- 2.54e-07   erg/cm2
Peak flux Cutoff-PL 1.95e-01 2.23e-01 1.82e-01 2.47e-01 6.91e-01 8.89e-01   ph/cm2/s
              Error -------- -------- -------- -------- 1.42e-01 2.37e-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    1.786    0.188    -      -           1.44e-03 1.63e-04   38.220 57
CPL   2.432    0.580     152.4    0.0      6.95e-04 0.00e+00   37.810 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.290    0.392    -      -           5.80e-03 1.18e-03   44.230 57
CPL   2.574    1.635     182.4    0.0      1.18e-03 0.00e+00   43.520 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: 42.816000 sec.
T50 in the 50-300 keV band: 24.192000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   58.588  -42.392   16.196
T90    53.960  -40.096   13.864
T50    28.076  -24.496    3.580
Peak    1.000    0.508    1.508

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
  170.0758    55.9963   0.0133    17.1560    43.0047         1.3464225     14.532 TRIG_00685124                 
 
Foreground time interval of the image:
-42.392  16.196 (delta_t =  58.588 [sec])
Background time interval of the image:
-239.568 -42.392 (delta_t = 197.176 [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 4.096000

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 4.096000

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 4.096000

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  -42.392 sec. to   16.196 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.78594     ( -0.185304   0.19139 )
Norm@50keV  : 1.43744E-03    ( -0.00016482   0.000160777 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.22 using 59 PHA bins.
# Reduced chi-squared =         0.6706 for     57 degrees of freedom 
# Null hypothesis probability =   9.735662e-01
 
Photon flux (15-150 keV)    in 58.59 sec: 0.197017 ( -0.018808  0.018819 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.75878e-07 ( -9.01003e-08  9.19898e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  -42.392 sec. to   16.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.43222     ( -0.977837   0.181426 )
Epeak [keV] : 152.371      (   )
Norm@50keV  : 6.94776E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.81 using 59 PHA bins.
# Reduced chi-squared =         0.6751 for     56 degrees of freedom 
# Null hypothesis probability =   9.703706e-01
 
Photon flux (15-150 keV)    in 58.59 sec: 0.175179 ( -0.016859  0.016954 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.82041e-07 ( 0  0 ) ergs/cm2

Band function

Time interval is from  -42.392 sec. to   16.196 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.88048   ( -4.88048   -4.88048 )
beta        : -1.81886    ( -0.211121   0.196402 )
Epeak [keV] : 18.8925      ( -18.8925 4.78518 )
Norm@50keV   : 945.441    ( -89.7176   1.31747e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.90 using 59 PHA bins.
# Reduced chi-squared =         0.6890 for     55 degrees of freedom 
# Null hypothesis probability =   9.619427e-01
 
Photon flux (15-150 keV)    in 58.59 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]    : 10.4628  (-1.44824  1.8181)
R^2/D10^2   : 7.43423E-02  (-0.0331172   0.0561504)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          80.91 using 59 PHA bins.
# Reduced chi-squared =          1.419 for     57 degrees of freedom 
# Null hypothesis probability =   2.036973e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.846e-08   1.708e-08
25- 50  2.606e-07   3.222e-08
50-150  1.548e-07   4.265e-08
15-150  5.139e-07   7.025e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 103.940       (-34.0509      89.8318)
Norm        : 0.861922       (-0.113769     0.127869)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.20 using 59 PHA bins.
# Reduced chi-squared =         0.7403 for     57 degrees of freedom 
# Null hypothesis probability =   9.284822e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.320e-07   1.857e-08
25- 50  2.300e-07   2.768e-08
50-150  3.808e-07   1.463e-07
15-150  7.427e-07   1.731e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.92355        (-1.18514      1.32952)
R1^2/D10^2  : 0.502656        (-0.267728      0.372609)
kT2 [keV]   : 29.1307        (-7.99277      17.151)
R2^2/D10^2  : 1.54991E-03    (-0.00115244   0.00175194)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.29 using 59 PHA bins.
# Reduced chi-squared =         0.6599 for     55 degrees of freedom 
# Null hypothesis probability =   9.757738e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.470e-07   5.329e-08
25- 50  2.055e-07   5.437e-08
50-150  4.645e-07   2.508e-07
15-150  8.170e-07   2.927e-07

Peak spectrum fit

Power-law model

Time interval is from    0.508 sec. to    1.508 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28979     ( -0.396747   0.3873 )
Norm@50keV  : 5.80128E-03    ( -0.00118791   0.00118132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.23 using 59 PHA bins.
# Reduced chi-squared =         0.7760 for     57 degrees of freedom 
# Null hypothesis probability =   8.916362e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.690829 ( -0.142106  0.142607 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.74778e-08 ( -1.34172e-08  1.37025e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.508 sec. to    1.508 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.57446     ( -2.00919   1.26025 )
Epeak [keV] : 182.400      (   )
Norm@50keV  : 1.18209E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.52 using 59 PHA bins.
# Reduced chi-squared =         0.7772 for     56 degrees of freedom 
# Null hypothesis probability =   8.880076e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.690727 ( -0.142323  0.142516 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.79109e-08 ( 0  0 ) ergs/cm2

Band function

Time interval is from    0.508 sec. to    1.508 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.00694   ( 0.99627   0.99627 )
beta        : -1.28991    ( 1.2898   0.396744 )
Epeak [keV] : 55.3818      ( -57.7969 -57.7969 )
Norm@50keV   : 1.06704E-02    ( -0.00601103   1.2897 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.23 using 59 PHA bins.
# Reduced chi-squared =         0.8042 for     55 degrees of freedom 
# Null hypothesis probability =   8.503398e-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]    : 17.2571  (-5.22705  9.02148)
R^2/D10^2   : 4.79690E-02  (-0.0346647   0.113726)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.96 using 59 PHA bins.
# Reduced chi-squared =         0.9466 for     57 degrees of freedom 
# Null hypothesis probability =   5.900327e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.897e-09   1.442e-09
25- 50  1.297e-08   4.738e-09
50-150  2.771e-08   1.371e-08
15-150  4.358e-08   1.671e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-87.9635      -199.363)
Norm        : 2.82785       (-0.579986     0.57998)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.13 using 59 PHA bins.
# Reduced chi-squared =         0.8093 for     57 degrees of freedom 
# Null hypothesis probability =   8.479704e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.042e-09   4.161e-09
25- 50  1.355e-08   8.010e-09
50-150  2.971e-08   1.679e-08
15-150  5.030e-08   2.932e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.79246        (-4.52957      5.17445)
R1^2/D10^2  : 0.527576        (-0.424512      0.796578)
kT2 [keV]   : 47.7652        (-27.046      -47.8977)
R2^2/D10^2  : 1.86754E-03    (-0.00176706   0.0214872)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.18 using 59 PHA bins.
# Reduced chi-squared =         0.8033 for     55 degrees of freedom 
# Null hypothesis probability =   8.515578e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.159e-09   3.735e-09
25- 50  1.293e-08   7.355e-09
50-150  4.251e-08   2.407e-08
15-150  6.160e-08   3.172e-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: 1.78594     ( -0.185304   0.19139 )
Norm@50keV  : 1.43744E-03    ( -0.00016482   0.000160777 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.22 using 59 PHA bins.
# Reduced chi-squared =         0.6706 for     57 degrees of freedom 
# Null hypothesis probability =   9.735662e-01
 
Photon flux (15-150 keV)    in 58.59 sec: 0.197007 ( -0.0188065  0.0188176 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.75749e-07 ( -9.02432e-08  9.20027e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.00928     ( -0.41046   -2.00928 )
Epeak [keV] : 3.99168      (   )
Norm@50keV  : 1.08269E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.33 using 59 PHA bins.
# Reduced chi-squared =         0.6666 for     56 degrees of freedom 
# Null hypothesis probability =   9.741326e-01
 
Photon flux (15-150 keV)    in 58.59 sec: 0.197121 ( -0.018945  0.01871 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.77009e-07 ( -9.14941e-08  8.92677e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.88048   ( -4.88048   -4.88048 )
beta        : -1.81886    ( -0.211121   0.196402 )
Epeak [keV] : 18.8925      ( -18.8925 4.78518 )
Norm@50keV   : 945.441    ( -89.7176   1.31747e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.90 using 59 PHA bins.
# Reduced chi-squared =         0.6890 for     55 degrees of freedom 
# Null hypothesis probability =   9.619427e-01
 
Photon flux (15-150 keV)    in 58.59 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)  = 2.17e-07
S(50-100 keV) = 2.52e-07

T90 vs. Hardness ratio plot

T90                                   = 53.9599999189377 sec.
Hardness ratio (energy fluence ratio) = 1.16129

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.928972
Count Ratio (50-100 keV) / (15-25 keV) = 0.623898

Mask shadow pattern

IMX = 2.257593271116630E-01, IMY = -2.105589530163878E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-239.568000 -42.392000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']

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

Time interval of the image:
-42.392000 16.196000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.0758  55.9963    0.8  17.2   43.0   1.3464  14.6 ------	UNKNOWN                       
298.7423  71.1243    2.4  55.5  -14.5   1.4265   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
78.532600 838.492000
840.432000 906.032600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
184.3113  21.6031    2.2  36.0  116.9   5.8243   5.2 ------	UNKNOWN                       
264.7569  50.3913    2.5  52.5   13.1   6.9637   4.6 ------	UNKNOWN                       
143.1047  13.5081    2.9  47.3  176.7   4.6853   4.0 ------	UNKNOWN                       
265.8777  66.0047    3.3  42.8   -3.5   2.8344   3.5 ------	UNKNOWN                       
118.9359  13.1377    5.2  58.0 -156.8   8.7707   2.3 ------	UNKNOWN                       
333.9709  69.1090    3.8  54.3  -33.1   8.7953   3.0 ------	UNKNOWN

Plot creation:
Fri Jun  3 15:16:02 EDT 2016