batgrbproduct analysis for trigger=703176

batgrbproduct Analysis for Trigger=703176

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 Jul 22 13:30:44 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger703176
======================================================================

  Trigger: 00703176      Segment: 000

  BAT Trigger Time: 489445344   [s; MET]
      Trigger Stop: 489445408   [s; MET]
               UTC: 2016-07-05T21:02:07.482980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 168.085793209721   Dec: 46.7215352735169  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.56
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.56

  Flight Position:   [ source = BAT ]
    RA: 168.085793209721   Dec: 46.7215352735169  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 168.105784083166   Dec: 46.7053148422327  [deg; J2000]  
        { 11h 12m 25.4s , +46d 42' 19.1" }
         +/- 2.31217469878328 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.846992371840582 [arcmin] (formal 1-sigma fit error)
    SNR: 9.18520572336769
 
  Angular difference between Flight and Ground position is 1.274172 arcmin
 
  Partial Coding Fraction: 0.7421875    [ including projection effects ]

  Duration
     T90: 54.5799999237061 +/- 12.5740159248871
        Measured from: -5.05199998617172
                   to: 49.5279999375343     [s; relative to TRIGTIME]
     T50: 28.1519999504089 +/- 11.1539045996016
        Measured from: 4.38800001144409
                   to: 32.539999961853     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 26.0440000295639     
                   to: 27.0440000295639     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -14.4840000271797     
                   to: 55.1320000290871     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.502801   0.326508   0.355894   0.056006
           0.052665   0.054669   0.047991   0.043028 [error]
 Peak      0.024146   0.013088   0.015204   0.005213
           0.006405   0.006326   0.005617   0.005391 [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 1.28e-07 2.01e-07 2.38e-07 5.47e-07 7.24e-07 1.11e-06   erg/cm2
              Error 2.70e-08 2.56e-08 4.98e-08 2.45e-07 1.12e-07 2.87e-07   erg/cm2
Peak flux Power-law 2.32e-01 1.58e-01 7.03e-02 4.33e-02 4.82e-01 5.04e-01   ph/cm2/s
              Error 1.17e-01 5.80e-02 6.35e-02 7.79e-02 1.55e-01 1.69e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.20e-07 -------- 1.57e-07 5.44e-07 -------- 1.09e-06   erg/cm2
              Error 3.12e-08 -------- 4.96e-08 -------- -------- 3.03e-07   erg/cm2
Peak flux Cutoff-PL 2.15e-01 6.08e-02 9.95e-03 2.23e-03 2.87e-01 2.90e-01   ph/cm2/s
              Error 1.11e-01 8.77e-02 2.48e-02 -------- 2.08e-01 --------   ph/cm2/s
 
Fluence        Band 1.28e-07 1.96e-07 2.36e-07 5.42e-07 7.24e-07 8.01e-07   erg/cm2
              Error 2.70e-08 2.57e-08 4.39e-08 1.84e-07 1.12e-07 2.34e-07   erg/cm2
Peak flux      Band 2.32e-01 1.58e-01 7.03e-02 4.33e-02 4.82e-01 5.04e-01   ph/cm2/s
              Error 1.17e-01 5.81e-02 6.35e-02 7.79e-02 1.55e-01 1.69e-01   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.756    0.262    -      -           1.13e-03 1.67e-04   55.060 57
CPL   2.997    0.686     298.1 -116.0      3.01e-04 6.20e-04   52.790 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.165    0.986    -      -           2.96e-03 1.66e-03   68.780 57
CPL   3.791    1.179     448.2 -185.9      5.09e-04 1.62e-03   66.130 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: 63.040000 sec.
T50 in the 50-300 keV band: 25.280000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   69.616  -14.484   55.132
T90    54.580   -5.052   49.528
T50    28.152    4.388   32.540
Peak    1.000   26.044   27.044

Click here for the BAT GCN circular template

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
  168.1058    46.7053   0.0210    32.0581     9.3282         1.0649220      9.185 TRIG_00703176                 
 
Foreground time interval of the image:
-14.484  55.132 (delta_t =  69.616 [sec])
Background time interval of the image:
-239.000 -14.484 (delta_t = 224.516 [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  -14.484 sec. to   55.132 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.75626     ( -0.254306   0.269535 )
Norm@50keV  : 1.12972E-03    ( -0.000170447   0.000163567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.06 using 59 PHA bins.
# Reduced chi-squared =         0.9659 for     57 degrees of freedom 
# Null hypothesis probability =   5.483111e-01
 
Photon flux (15-150 keV)    in 69.62 sec: 0.153118 ( -0.019677  0.019703 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.25614e-07 ( -1.11451e-07  1.13235e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -14.484 sec. to   55.132 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.99651     ( -1.00647   0.366407 )
Epeak [keV] : 298.135      ( -65.0829 -297.055 )
Norm@50keV  : 3.01028E-04    ( -0.000303212   0.000935992 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.79 using 59 PHA bins.
# Reduced chi-squared =         0.9427 for     56 degrees of freedom 
# Null hypothesis probability =   5.970501e-01
 
Photon flux (15-150 keV)    in 69.62 sec: 0.153760 ( -0.021118  0.019642 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from  -14.484 sec. to   55.132 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.42754   ( 1.42755   1.42755 )
beta        : -1.75623    ( 1.75624   0.254251 )
Epeak [keV] : 19.2505      ( -19.2497 -19.2497 )
Norm@50keV   : 2.57736E-03    ( -0.00160413   0.173212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.06 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     55 degrees of freedom 
# Null hypothesis probability =   4.724670e-01
 
Photon flux (15-150 keV)    in 69.62 sec: 0.155484 ( -0.025017  0.022933 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.25594e-07 ( -1.1143e-07  1.13256e-07 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 14.6254  (-2.81231  3.3579)
R^2/D10^2   : 1.71020E-02  (-0.016932   0.0192819)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          86.59 using 59 PHA bins.
# Reduced chi-squared =          1.519 for     57 degrees of freedom 
# Null hypothesis probability =   6.954743e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.352e-08   1.426e-08
25- 50  2.077e-07   4.779e-08
50-150  2.989e-07   8.716e-08
15-150  5.601e-07   1.102e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 163.278       (-78.1894      -156.528)
Norm        : 0.605010       (-0.0849607     0.129322)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.45 using 59 PHA bins.
# Reduced chi-squared =          1.025 for     57 degrees of freedom 
# Null hypothesis probability =   4.218324e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.073e-07   5.921e-08
25- 50  2.013e-07   1.064e-07
50-150  4.111e-07   2.362e-07
15-150  7.199e-07   4.017e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.85585        (-0.868884      1.09868)
R1^2/D10^2  : 2.51491        (-1.75911      7.08184)
kT2 [keV]   : 23.1225        (-4.83591      7.59149)
R2^2/D10^2  : 3.02491E-03    (-0.00182982   0.00376851)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.80 using 59 PHA bins.
# Reduced chi-squared =         0.8692 for     55 degrees of freedom 
# Null hypothesis probability =   7.435190e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.533e-07   8.031e-08
25- 50  1.539e-07   5.765e-08
50-150  4.426e-07   2.113e-07
15-150  7.498e-07   2.414e-07

Peak spectrum fit

Power-law model

Time interval is from   26.044 sec. to   27.044 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.16526     ( -0.849327   1.12227 )
Norm@50keV  : 2.96313E-03    ( -0.00179457   0.00152035 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.78 using 59 PHA bins.
# Reduced chi-squared =          1.207 for     57 degrees of freedom 
# Null hypothesis probability =   1.362883e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.481793 ( -0.155359  0.155343 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.77013e-08 ( -1.24499e-08  1.38955e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   26.044 sec. to   27.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.79104     ( -1.78708   0.571492 )
Epeak [keV] : 448.167      ( -77.7611 -449.531 )
Norm@50keV  : 5.09166E-04    ( -0.000502991   0.00273926 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.13 using 59 PHA bins.
# Reduced chi-squared =          1.181 for     56 degrees of freedom 
# Null hypothesis probability =   1.667842e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.287483 ( -0.164687  0.251911 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.64588e-08 ( 0  0 ) ergs/cm2

Band function

Time interval is from   26.044 sec. to   27.044 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.99037   ( 9.99037   9.99037 )
beta        : -2.16645    ( -1.11761   0.850845 )
Epeak [keV] : 13.9829      ( -13.9829 -13.9829 )
Norm@50keV   : 0.402477    ( -0.243777   0.206771 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.78 using 59 PHA bins.
# Reduced chi-squared =          1.251 for     55 degrees of freedom 
# Null hypothesis probability =   1.001734e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.481792 ( -0.155403  0.155362 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.49454e-16 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 4.79243  (-1.38108  2.14991)
R^2/D10^2   : 4.37158  (-4.37158   18.6035)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.16 using 59 PHA bins.
# Reduced chi-squared =          1.266 for     57 degrees of freedom 
# Null hypothesis probability =   8.507916e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.945e-09   5.500e-09
25- 50  5.254e-09   3.446e-09
50-150  1.732e-10   1.806e-10
15-150  1.437e-08   9.030e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 68.8873       (-71.6604      -71.6604)
Norm        : 2.26697       (-0.993573     13.5443)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.22 using 59 PHA bins.
# Reduced chi-squared =          1.250 for     57 degrees of freedom 
# Null hypothesis probability =   9.740850e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.806e-09   3.717e-09
25- 50  9.197e-09   5.645e-09
50-150  1.167e-08   1.007e-08
15-150  2.668e-08   1.801e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.42436        (-1.31974      1.66537)
R1^2/D10^2  : 5.99023        (-4.72317      22.178)
kT2 [keV]   : 99.9275        (-74.4563      -99.9691)
R2^2/D10^2  : 2.62032E-04    (-0.000216116   0.00551303)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.07 using 59 PHA bins.
# Reduced chi-squared =          1.129 for     55 degrees of freedom 
# Null hypothesis probability =   2.387890e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.857e-09   5.440e-09
25- 50  5.435e-09   3.247e-09
50-150  2.529e-08   1.625e-08
15-150  3.959e-08   2.859e-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: 1.75626     ( -0.254306   0.269535 )
Norm@50keV  : 1.12972E-03    ( -0.000170447   0.000163567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.06 using 59 PHA bins.
# Reduced chi-squared =         0.9659 for     57 degrees of freedom 
# Null hypothesis probability =   5.483111e-01
 
Photon flux (15-150 keV)    in 69.62 sec: 0.153109 ( -0.0196744  0.0197021 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.25482e-07 ( -1.11402e-07  1.13252e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.99672     ( -1.00635   0.366547 )
Epeak [keV] : 298.182      ( -65.0896 -297.097 )
Norm@50keV  : 3.00962E-04    ( -0.000303156   0.000936056 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.79 using 59 PHA bins.
# Reduced chi-squared =         0.9427 for     56 degrees of freedom 
# Null hypothesis probability =   5.970485e-01
 
Photon flux (15-150 keV)    in 69.62 sec: 0.153139 ( -0.01944  0.019605 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.27926e-07 ( -1.13918e-07  1.04681e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.42754   ( 1.42755   1.42755 )
beta        : -1.75623    ( 1.75624   0.254251 )
Epeak [keV] : 19.2505      ( -19.2497 -19.2497 )
Norm@50keV   : 2.57736E-03    ( -0.00160413   0.173212 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.06 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     55 degrees of freedom 
# Null hypothesis probability =   4.724670e-01
 
Photon flux (15-150 keV)    in 69.62 sec: 0.155484 ( -0.025017  0.022933 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.25594e-07 ( -1.1143e-07  1.13256e-07 ) ergs/cm2

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

S(25-50 keV)  = 2.01e-07
S(50-100 keV) = 2.38e-07

T90 vs. Hardness ratio plot

T90                                   = 54.5799999237061 sec.
Hardness ratio (energy fluence ratio) = 1.18408

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.649378
Count Ratio (50-100 keV) / (15-25 keV) = 0.707823

Mask shadow pattern

IMX = 6.179974737614500E-01, IMY = -1.015129607932960E-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:
-239.000000 -14.484000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
112.7480  15.6679    4.8  40.8  -92.3   2.2786   2.4 ------	UNKNOWN                       
115.2033 -10.6527    2.3  48.0 -129.1   4.6927   5.0 ------	UNKNOWN

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

Time interval of the image:
-14.484000 55.132000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
168.1058  46.7053    1.3  32.1    9.3   1.0646   9.2 ------	UNKNOWN                       
140.3280 -26.6638    2.5  45.5 -168.6   0.7901   4.6 ------	UNKNOWN                       
132.1833  -7.9289    2.7  33.4 -142.6   0.5289   4.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
129.300590 963.045900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
251.0197  74.7649    2.3  43.6   25.6   5.0637   5.0 ------	UNKNOWN                       
134.4039   8.2442    3.2  48.0 -129.1   9.3700   3.6 ------	UNKNOWN                       
124.9477  22.8520    3.2  41.9 -106.2   9.0865   3.6 ------	UNKNOWN

Plot creation:
Fri Jul 22 14:16:00 EDT 2016