batgrbproduct analysis for trigger=708598

batgrbproduct Analysis for Trigger=708598

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 Sep 11 20:58:37 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger708598
======================================================================

  Trigger: 00708598      Segment: 000

  BAT Trigger Time: 492954328.448   [s; MET]
      Trigger Stop: 492954329.472   [s; MET]
               UTC: 2016-08-15T11:45:11.734540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 288.686231783051   Dec: 84.2999980928292  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.55
     Image Trigger?:     NO
     Rate S/N Ratio:     29.3938769133981  [ if not an image trigger ]
     Image S/N Ratio:    12.55

  Flight Position:   [ source = BAT ]
    RA: 288.686231783051   Dec: 84.2999980928292  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 288.616285136508   Dec: 84.2984506938288  [deg; J2000]  
        { 19h 14m 27.9s , +84d 17' 54.4" }
         +/- 0.969787085396543 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.335371393467033 [arcmin] (formal 1-sigma fit error)
    SNR: 31.7798687681838
 
  Angular difference between Flight and Ground position is 0.427095 arcmin
 
  Partial Coding Fraction: 0.4101562    [ including projection effects ]

  Duration
     T90: 8.56799989938736 +/- 1.8342955655889
        Measured from: -4.25999999046326
                   to: 4.3079999089241     [s; relative to TRIGTIME]
     T50: 2.87199997901917 +/- 0.291204389676345
        Measured from: -0.156000018119812
                   to: 2.71599996089935     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.14399999380112     
                   to: 3.14399999380112     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.40799999237061     
                   to: 5.19599997997284     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.655528   0.914291   0.630525   0.122144
           0.038439   0.041549   0.036145   0.028525 [error]
 Peak      0.145093   0.191871   0.159921   0.030142
           0.013068   0.014501   0.012825   0.009217 [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 2.49e-07 3.99e-07 4.84e-07 1.15e-06 1.46e-06 2.27e-06   erg/cm2
              Error 2.18e-08 2.18e-08 3.49e-08 1.72e-07 8.40e-08 2.02e-07   erg/cm2
Peak flux Power-law 1.62e+00 1.56e+00 1.05e+00 1.11e+00 4.69e+00 5.35e+00   ph/cm2/s
              Error 2.19e-01 1.32e-01 1.02e-01 2.16e-01 3.79e-01 4.14e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.18e-07 4.29e-07 5.06e-07 4.42e-07 1.39e-06 1.60e-06   erg/cm2
              Error 2.64e-08 2.72e-08 3.95e-08 2.06e-07 9.09e-08 2.22e-07   erg/cm2
Peak flux Cutoff-PL 1.48e+00 1.62e+00 1.11e+00 7.36e-01 4.60e+00 4.94e+00   ph/cm2/s
              Error 2.74e-01 1.51e-01 1.23e-01 3.69e-01 3.93e-01 5.72e-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    1.725    0.092    -      -           1.36e-02 7.54e-04   60.000 57
CPL   0.961    0.414      67.7   15.7      3.31e-02 1.65e-02   48.200 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.570    0.132    -      -           3.68e-02 2.90e-03   33.770 57
CPL   1.134    0.538     106.5  -35.7      5.96e-02 3.83e-02   31.780 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: 3.968000 sec.
T50 in the 50-300 keV band: 2.176000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   11.604   -6.408    5.196
T90     8.568   -4.260    4.308
T50     2.872   -0.156    2.716
Peak    1.000    2.144    3.144

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
  288.6163    84.2985   0.0061    41.9049    13.6167         2.4691020     31.780 TRIG_00708598                 
 
Foreground time interval of the image:
 -6.408   5.196 (delta_t =  11.604 [sec])
Background time interval of the image:
-239.448  -6.408 (delta_t = 233.040 [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   -6.408 sec. to    5.196 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.72491     ( -0.0910761   0.0922982 )
Norm@50keV  : 1.36258E-02    ( -0.000755416   0.000752361 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.00 using 59 PHA bins.
# Reduced chi-squared =          1.053 for     57 degrees of freedom 
# Null hypothesis probability =   3.675722e-01
 
Photon flux (15-150 keV)    in 11.6 sec: 1.82577 ( -0.10073  0.10092 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.46103e-06 ( -8.38286e-08  8.40733e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -6.408 sec. to    5.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.961261     ( -0.434067   0.39484 )
Epeak [keV] : 67.7279      ( -9.67607 21.6706 )
Norm@50keV  : 3.30991E-02    ( -0.0119584   0.0211368 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.20 using 59 PHA bins.
# Reduced chi-squared =         0.8607 for     56 degrees of freedom 
# Null hypothesis probability =   7.613327e-01
 
Photon flux (15-150 keV)    in 11.6 sec: 1.75870 ( -0.10601  0.1062 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39351e-06 ( -9.07373e-08  9.1087e-08 ) ergs/cm2

Band function

Time interval is from   -6.408 sec. to    5.196 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]    : 13.7244  (-0.830347  0.885153)
R^2/D10^2   : 0.273876  (-0.0565237   0.0707683)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         104.57 using 59 PHA bins.
# Reduced chi-squared =         1.8346 for     57 degrees of freedom 
# Null hypothesis probability =   1.249933e-04
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.266e-07   1.286e-08
25- 50  4.616e-07   2.975e-08
50-150  5.666e-07   6.328e-08
15-150  1.155e-06   7.378e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 128.995       (-26.2659      32.0494)
Norm        : 7.63231       (-0.499632     0.61626)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.14 using 59 PHA bins.
# Reduced chi-squared =         0.8796 for     57 degrees of freedom 
# Null hypothesis probability =   7.281357e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.298e-07   2.030e-08
25- 50  4.162e-07   3.196e-08
50-150  7.688e-07   2.262e-07
15-150  1.415e-06   2.521e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.83563        (-1.29658      1.65175)
R1^2/D10^2  : 3.32220        (-1.88076      5.49131)
kT2 [keV]   : 19.3012        (-2.37843      3.80472)
R2^2/D10^2  : 6.33993E-02    (-0.0340096   0.0464594)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.40 using 59 PHA bins.
# Reduced chi-squared =         0.8981 for     55 degrees of freedom 
# Null hypothesis probability =   6.877446e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.209e-07   6.610e-08
25- 50  4.174e-07   8.839e-08
50-150  7.278e-07   1.354e-07
15-150  1.366e-06   2.079e-07

Peak spectrum fit

Power-law model

Time interval is from    2.144 sec. to    3.144 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.56993     ( -0.130668   0.13262 )
Norm@50keV  : 3.67945E-02    ( -0.00290336   0.00289516 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          33.77 using 59 PHA bins.
# Reduced chi-squared =         0.5924 for     57 degrees of freedom 
# Null hypothesis probability =   9.938919e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.68544 ( -0.37905  0.37982 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.45478e-07 ( -2.89078e-08  2.90377e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.144 sec. to    3.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.13369     ( -0.587438   0.489275 )
Epeak [keV] : 106.504      ( -35.1493 -106.504 )
Norm@50keV  : 5.96298E-02    ( -0.0242499   0.0523076 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.78 using 59 PHA bins.
# Reduced chi-squared =         0.5676 for     56 degrees of freedom 
# Null hypothesis probability =   9.962451e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.60101 ( -0.39245  0.39305 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.39735e-07 ( -3.00644e-08  3.00251e-08 ) ergs/cm2

Band function

Time interval is from    2.144 sec. to    3.144 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]    : 15.9158  (-1.44392  1.59046)
R^2/D10^2   : 0.434739  (-0.125547   0.174638)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.12 using 59 PHA bins.
# Reduced chi-squared =          1.160 for     57 degrees of freedom 
# Null hypothesis probability =   1.910095e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.280e-08   3.455e-09
25- 50  9.549e-08   9.965e-09
50-150  1.687e-07   2.270e-08
15-150  2.870e-07   2.475e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.168       (-60.0274      -199.209)
Norm        : 19.1146       (-1.46773     1.63085)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          32.03 using 59 PHA bins.
# Reduced chi-squared =         0.5620 for     57 degrees of freedom 
# Null hypothesis probability =   9.969471e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.760e-08   4.360e-09
25- 50  9.156e-08   1.477e-08
50-150  2.007e-07   6.953e-08
15-150  3.399e-07   9.340e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.47623        (-1.53878      2.66791)
R1^2/D10^2  : 24.1144        (-20.2668      125.382)
kT2 [keV]   : 20.3035        (-2.71751      4.86183)
R2^2/D10^2  : 0.162746    (-0.0945971   0.119704)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          32.68 using 59 PHA bins.
# Reduced chi-squared =         0.5943 for     55 degrees of freedom 
# Null hypothesis probability =   9.927688e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.972e-08   2.161e-08
25- 50  8.281e-08   1.866e-08
50-150  1.984e-07   3.580e-08
15-150  3.310e-07   6.240e-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: 1.72491     ( -0.0910761   0.0922982 )
Norm@50keV  : 1.36258E-02    ( -0.000755416   0.000752361 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.00 using 59 PHA bins.
# Reduced chi-squared =          1.053 for     57 degrees of freedom 
# Null hypothesis probability =   3.675722e-01
 
Photon flux (15-150 keV)    in 11.6 sec: 1.82569 ( -0.100721  0.10091 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.46076e-06 ( -8.38244e-08  8.41392e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.961262     ( -0.434068   0.394839 )
Epeak [keV] : 67.7279      ( -9.67609 21.6706 )
Norm@50keV  : 3.30991E-02    ( -0.0119584   0.0211368 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.20 using 59 PHA bins.
# Reduced chi-squared =         0.8607 for     56 degrees of freedom 
# Null hypothesis probability =   7.613327e-01
 
Photon flux (15-150 keV)    in 11.6 sec: 1.75846 ( -0.10587  0.10616 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39398e-06 ( -9.08744e-08  9.1118e-08 ) 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)  = 3.99e-07
S(50-100 keV) = 4.84e-07

T90 vs. Hardness ratio plot

T90                                   = 8.56799989938736 sec.
Hardness ratio (energy fluence ratio) = 1.21303

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.39474
Count Ratio (50-100 keV) / (15-25 keV) = 0.961858

Mask shadow pattern

IMX = 8.721793904678404E-01, IMY = -2.112719245971386E-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:
-239.448000 -6.408000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3770  35.5099   53.3  39.2   94.3   0.1875   0.2   10.8	Her X-1                       
 91.6114  61.8182    3.6  57.5  -26.2   3.7401   3.2 ------	UNKNOWN                       
164.0628  18.8313    2.0  43.1 -113.4   5.0932   5.6 ------	UNKNOWN

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

Time interval of the image:
-6.408000 5.196000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4770  35.4666    4.7  39.3   94.3  -0.4644  -2.4    7.5	Her X-1                       
333.3416  78.4281    2.1  50.1   16.7   0.7802   5.5 ------	UNKNOWN                       
288.6164  84.2984    0.4  41.9   13.6   2.4695  31.8 ------	UNKNOWN                       
271.7616  83.5992    2.1  40.1   14.4   0.3715   5.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
77.652590 962.624200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3244  35.3577    5.9  50.0  163.1   3.8717   2.0    6.6	Her X-1                       
325.3160  73.7899    3.6  12.1   73.8   1.6686   3.3 ------	UNKNOWN                       
 52.6793  58.4588    2.3  35.0   -4.6   3.7968   5.0 ------	UNKNOWN                       
178.0830  72.8937    2.2  19.8 -108.1   3.0390   5.3 ------	UNKNOWN                       
 69.6723  34.8947    3.4  59.6  -17.0  14.0885   3.4 ------	UNKNOWN                       
 78.9753  36.1966    3.6  58.8  -25.9  13.6719   3.2 ------	UNKNOWN                       
 98.5733  44.9639    4.3  50.6  -44.5   9.1761   2.7 ------	UNKNOWN

Plot creation:
Sun Sep 11 22:09:54 EDT 2016