batgrbproduct analysis for trigger=932742

batgrbproduct Analysis for Trigger=932742

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): Wed Nov 27 11:56:56 EST 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger932742
======================================================================

  Trigger: 00932742      Segment: 000

  BAT Trigger Time: 594335307.2   [s; MET]
      Trigger Stop: 594335309.248   [s; MET]
               UTC: 2019-11-01T21:08:03.350920    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 251.844271456864   Dec: 43.7542036411452  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.15
     Image Trigger?:     NO
     Rate S/N Ratio:     8.24621125123532  [ if not an image trigger ]
     Image S/N Ratio:    7.15

  Flight Position:   [ source = BAT ]
    RA: 251.844271456864   Dec: 43.7542036411452  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 251.853907832996   Dec: 43.741941831711  [deg; J2000]  
        { 16h 47m 24.9s , +43d 44' 31.0" }
         +/- 1.56110456999774 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.661067071435162 [arcmin] (formal 1-sigma fit error)
    SNR: 16.0985573261819
 
  Angular difference between Flight and Ground position is 0.846000 arcmin
 
  Partial Coding Fraction: 0.4726562    [ including projection effects ]

  Duration
     T90: 142.707999944687 +/- 18.247231101651
        Measured from: -16.4800000190735
                   to: 126.227999925613     [s; relative to TRIGTIME]
     T50: 68.0080000162125 +/- 29.4991776124459
        Measured from: 0.423999905586243
                   to: 68.4319999217987     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.992000102996826     
                   to: 0.00799989700317383     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.2440000772476     
                   to: 143.503999948502     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.964490   1.212917   0.823541   0.115957
           0.104280   0.107859   0.095190   0.085805 [error]
 Peak      0.040809   0.075055   0.019797   0.005138
           0.010228   0.010834   0.010046   0.008897 [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 3.21e-07 5.11e-07 6.14e-07 1.45e-06 1.86e-06 2.90e-06   erg/cm2
              Error 5.07e-08 5.14e-08 9.24e-08 4.50e-07 2.16e-07 5.34e-07   erg/cm2
Peak flux Power-law 5.86e-01 4.41e-01 2.22e-01 1.60e-01 1.32e+00 1.41e+00   ph/cm2/s
              Error 1.63e-01 9.12e-02 7.58e-02 1.02e-01 2.71e-01 2.94e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.08e-07 5.29e-07 6.21e-07 8.98e-07 1.81e-06 2.36e-06   erg/cm2
              Error 5.80e-08 6.60e-08 9.73e-08 8.01e-07 2.43e-07 6.92e-07   erg/cm2
Peak flux Cutoff-PL 4.88e-01 5.39e-01 2.12e-01 2.24e-02 1.26e+00 1.26e+00   ph/cm2/s
              Error 2.00e-01 1.35e-01 9.64e-02 7.79e-02 2.77e-01 2.82e-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    1.732    0.182    -      -           1.22e-03 1.36e-04   44.790 57
CPL   1.441    0.630      89.6  -11.8      1.75e-03 1.78e-03   44.290 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.993    0.373    -      -           8.85e-03 2.33e-03   43.660 57
CPL   0.101    2.347      41.4   18.5      1.10e-01 2.41e+00   40.660 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: 33.024000 sec.
T50 in the 50-300 keV band: 14.272000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  164.748  -21.244  143.504
T90   142.708  -16.480  126.228
T50    68.008    0.424   68.432
Peak    1.000   -0.992    0.008

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
  251.8539    43.7419   0.0119    40.7678   172.7360         2.4382257     16.099 TRIG_00932742                 
 
Foreground time interval of the image:
-21.244  25.101 (delta_t =  46.345 [sec])
Background time interval of the image:
-239.200 -21.244 (delta_t = 217.956 [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  -21.244 sec. to  143.504 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73237     ( -0.17918   0.185004 )
Norm@50keV  : 1.22423E-03    ( -0.000136717   0.000134527 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.79 using 59 PHA bins.
# Reduced chi-squared =         0.7857 for     57 degrees of freedom 
# Null hypothesis probability =   8.798239e-01
 
Photon flux (15-150 keV)    in 164.7 sec: 0.164481 ( -0.016657  0.016673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.86279e-06 ( -2.14993e-07  2.17738e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -21.244 sec. to  143.504 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44117     ( -0.803572   0.457351 )
Epeak [keV] : 89.6449      ( -66.0262 -89.6454 )
Norm@50keV  : 1.75281E-03    ( -0.00065068   0.00290102 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.29 using 59 PHA bins.
# Reduced chi-squared =         0.7910 for     56 degrees of freedom 
# Null hypothesis probability =   8.707625e-01
 
Photon flux (15-150 keV)    in 164.7 sec: 0.162433 ( -0.017417  0.017349 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.81625e-06 ( -2.42577e-07  2.4331e-07 ) ergs/cm2

Band function

Time interval is from  -21.244 sec. to  143.504 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]    : 12.3750  (-1.53339  1.76617)
R^2/D10^2   : 3.53037E-02  (-0.0136359   0.0220737)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.30 using 59 PHA bins.
# Reduced chi-squared =          1.181 for     57 degrees of freedom 
# Null hypothesis probability =   1.650517e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.887e-07   3.314e-08
25- 50  6.154e-07   8.614e-08
50-150  5.781e-07   1.323e-07
15-150  1.382e-06   1.996e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 119.841       (-43.6985      -123.567)
Norm        : 0.700050       (-0.0870712     0.105439)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.41 using 59 PHA bins.
# Reduced chi-squared =         0.7791 for     57 degrees of freedom 
# Null hypothesis probability =   8.878889e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.936e-07   4.010e-08
25- 50  5.298e-07   8.663e-08
50-150  9.694e-07   4.678e-07
15-150  1.793e-06   5.637e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.51269        (-2.13919      2.33851)
R1^2/D10^2  : 0.244350        (-0.152428      0.799465)
kT2 [keV]   : 22.8798        (-6.3627      17.9093)
R2^2/D10^2  : 2.77543E-03    (-0.00238774   0.00737472)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.30 using 59 PHA bins.
# Reduced chi-squared =         0.8236 for     55 degrees of freedom 
# Null hypothesis probability =   8.215538e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.963e-07   1.398e-07
25- 50  5.350e-07   1.961e-07
50-150  9.578e-07   5.297e-07
15-150  1.789e-06   7.942e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.992 sec. to    0.008 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99275     ( -0.349767   0.395529 )
Norm@50keV  : 8.85271E-03    ( -0.00237402   0.00228818 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.66 using 59 PHA bins.
# Reduced chi-squared =         0.7660 for     57 degrees of freedom 
# Null hypothesis probability =   9.029700e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.32359 ( -0.27144  0.27145 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.16263e-08 ( -2.00916e-08  2.09106e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.992 sec. to    0.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.101245     ( -2.83976   1.85426 )
Epeak [keV] : 41.4038      ( -12.4523 24.6396 )
Norm@50keV  : 0.109894    ( -0.109885   4.71651 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.66 using 59 PHA bins.
# Reduced chi-squared =         0.7261 for     56 degrees of freedom 
# Null hypothesis probability =   9.385814e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.25911 ( -0.276614  0.27782 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.17034e-08 ( -1.81595e-08  2.17984e-08 ) ergs/cm2

Band function

Time interval is from   -0.992 sec. to    0.008 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]    : 10.5032  (-2.03519  2.4253)
R^2/D10^2   : 0.545373  (-0.298025   0.673152)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.72 using 59 PHA bins.
# Reduced chi-squared =         0.7320 for     57 degrees of freedom 
# Null hypothesis probability =   9.356405e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.244e-08   5.018e-09
25- 50  3.309e-08   1.179e-08
50-150  1.987e-08   9.717e-09
15-150  6.540e-08   2.311e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 63.4739       (-26.9181      67.3167)
Norm        : 6.88776       (-1.90467     2.64292)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.70 using 59 PHA bins.
# Reduced chi-squared =         0.7316 for     57 degrees of freedom 
# Null hypothesis probability =   9.360077e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.746e-08   5.045e-09
25- 50  2.702e-08   9.500e-09
50-150  3.219e-08   2.009e-08
15-150  7.667e-08   2.925e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.96940        (-2.93603      82.0969)
R1^2/D10^2  : 35.0600        (-51.4482      -51.4482)
kT2 [keV]   : 11.8220        (-2.55205      -11.6376)
R2^2/D10^2  : 0.319487    (-0.341302   0.573247)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.78 using 59 PHA bins.
# Reduced chi-squared =         0.7232 for     55 degrees of freedom 
# Null hypothesis probability =   9.390716e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.558e-08   7.695e-09
25- 50  3.002e-08   1.768e-08
50-150  2.426e-08   1.552e-08
15-150  6.986e-08   3.884e-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: 1.50835     ( -0.172895   0.174121 )
Norm@50keV  : 3.21079E-03    ( -0.000317871   0.000316709 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.93 using 59 PHA bins.
# Reduced chi-squared =         0.8409 for     57 degrees of freedom 
# Null hypothesis probability =   7.983600e-01
 
Photon flux (15-150 keV)    in 46.34 sec: 0.401740 ( -0.0405809  0.0407205 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40957e-06 ( -1.50892e-07  1.51922e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.42436     ( -0.746174   1.33809 )
Epeak [keV] : 351.292      ( -351.47 -351.47 )
Norm@50keV  : 3.53607E-03    ( -0.00353586   0.00462763 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.89 using 59 PHA bins.
# Reduced chi-squared =         0.8551 for     56 degrees of freedom 
# Null hypothesis probability =   7.713624e-01
 
Photon flux (15-150 keV)    in 46.34 sec: 0.400186 ( -0.042355  0.041764 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.40233e-06 ( -1.65494e-07  8.09004e-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)  = 5.11e-07
S(50-100 keV) = 6.14e-07

T90 vs. Hardness ratio plot

T90                                   = 142.707999944687 sec.
Hardness ratio (energy fluence ratio) = 1.20157

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.25757
Count Ratio (50-100 keV) / (15-25 keV) = 0.853862

Mask shadow pattern

IMX = -8.552778944758745E-01, IMY = -1.090181345441954E-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:
-239.200000 -21.244000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5320  35.2186    7.4  44.9 -175.8   0.6850   1.6    8.3	Her X-1                       
167.8192  74.8565    3.1  40.8   98.2   3.4062   3.8 ------	UNKNOWN                       
242.8924  59.4919    2.6  36.4  146.8   1.8334   4.5 ------	UNKNOWN                       
201.9792  48.3628    2.7  12.0  121.6   1.0122   4.2 ------	UNKNOWN                       
198.2055  14.1752    2.8  22.5  -69.7   1.2728   4.2 ------	UNKNOWN

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

Time interval of the image:
-21.244000 25.100600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5285  35.3413   17.6  44.8 -176.0   0.1084   0.7    3.5	Her X-1                       
251.8539  43.7420    0.7  40.8  172.7   2.4377  16.1 ------	UNKNOWN                       
268.9665  29.0539    2.1  58.5 -174.8   3.3659   5.5 ------	UNKNOWN                       
168.5541   0.5492    2.3  45.4  -25.8   0.8542   5.0 ------	UNKNOWN                       
201.4157  -4.5852    3.0  41.3  -74.7   1.4231   3.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
87.900590 962.870400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3138  35.2454   14.2   8.8 -140.5   0.7103   0.8    9.1	Her X-1                       
268.3414  -1.2973    0.0  47.4 -149.8   2.6407   1.1    9.5	SW J1753.5-0127               
288.7902  11.0141    9.3  45.7  177.3   2.3947   1.2    4.1	GRS 1915+105                  
299.6028  35.2001    1.2  37.3  139.5  19.1964  10.0    0.6	Cyg X-1                       
308.1160  40.9302    9.0  40.9  126.7   4.0269   1.3    1.4	Cyg X-3                       
311.9691  37.4953    2.4  45.1  129.3  21.2015   4.7 ------	UNKNOWN

Plot creation:
Wed Nov 27 16:19:38 EST 2019