batgrbproduct analysis for trigger=922107

batgrbproduct Analysis for Trigger=922107

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): Tue Oct  8 22:25:46 EDT 2019
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger922107
======================================================================

  Trigger: 00922107      Segment: 000

  BAT Trigger Time: 588350823.04   [s; MET]
      Trigger Stop: 588350824.064   [s; MET]
               UTC: 2019-08-24T14:46:39.574480    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 215.328919318933   Dec: -41.9023481012554  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.41
     Image Trigger?:     NO
     Rate S/N Ratio:     28.2488937836511  [ if not an image trigger ]
     Image S/N Ratio:    11.41

  Flight Position:   [ source = BAT ]
    RA: 215.328919318933   Dec: -41.9023481012554  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 215.323416226394   Dec: -41.8998596577854  [deg; J2000]  
        { 14h 21m 17.6s , -41d 53' 59.5" }
         +/- 1.70962728486775 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.445502614746175 [arcmin] (formal 1-sigma fit error)
    SNR: 14.1384576931672
 
  Angular difference between Flight and Ground position is 0.287557 arcmin
 
  Partial Coding Fraction: 0.2851562    [ including projection effects ]

  Duration
     T90: 169.360000014305 +/- 5.85471026588723
        Measured from: -62.9759999513626
                   to: 106.384000062943     [s; relative to TRIGTIME]
     T50: 51.824000120163 +/- 9.75651090526973
        Measured from: -1.75999999046326
                   to: 50.0640001296997     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.116000056266785     
                   to: 1.11600005626678     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -71.8880000114441     
                   to: 114.639999985695     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.830383   5.236525   3.673192   0.678148
           0.172943   0.181765   0.164206   0.150069 [error]
 Peak      0.117337   0.225224   0.232519   0.076721
           0.018196   0.022222   0.021387   0.017627 [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 1.25e-06 2.16e-06 2.85e-06 7.68e-06 8.36e-06 1.40e-05   erg/cm2
              Error 9.35e-08 9.57e-08 1.66e-07 9.74e-07 3.93e-07 1.10e-06   erg/cm2
Peak flux Power-law 1.18e+00 1.54e+00 1.48e+00 2.53e+00 5.04e+00 6.73e+00   ph/cm2/s
              Error 2.35e-01 1.90e-01 1.68e-01 6.06e-01 5.25e-01 7.51e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.18e-06 2.24e-06 2.91e-06 4.57e-06 8.11e-06 1.09e-05   erg/cm2
              Error 1.14e-07 1.14e-07 1.77e-07 2.11e-06 4.51e-07 2.14e-06   erg/cm2
Peak flux Cutoff-PL 1.06e+00 1.59e+00 1.57e+00 1.61e+00 4.97e+00 5.83e+00   ph/cm2/s
              Error 2.90e-01 2.14e-01 2.16e-01 9.56e-01 5.39e-01 1.14e+00   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    1.600    0.079    -      -           4.79e-03 2.09e-04   34.810 57
CPL   1.251    0.320     106.9  184.9      7.16e-03 2.68e-03   31.050 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.058    0.173    -      -           4.36e-02 4.45e-03   61.080 57
CPL   0.601    0.737     171.7  -44.8      7.08e-02 6.50e-02   59.960 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: 167.680000 sec.
T50 in the 50-300 keV band: 43.136000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  186.528  -71.888  114.640
T90   169.360  -62.976  106.384
T50    51.824   -1.760   50.064
Peak    1.000    0.116    1.116

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
  215.3234   -41.8999   0.0136    30.5032    55.1511         9.1324193     14.138 TRIG_00922107                 
 
Foreground time interval of the image:
-71.888  15.261 (delta_t =  87.149 [sec])
Background time interval of the image:
-239.040 -71.888 (delta_t = 167.152 [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  -71.888 sec. to  114.640 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59997     ( -0.0782758   0.0788261 )
Norm@50keV  : 4.79086E-03    ( -0.000209009   0.000208382 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.81 using 59 PHA bins.
# Reduced chi-squared =         0.6107 for     57 degrees of freedom 
# Null hypothesis probability =   9.910572e-01
 
Photon flux (15-150 keV)    in 186.5 sec: 0.615661 ( -0.026866  0.026912 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.35716e-06 ( -3.92101e-07  3.9447e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -71.888 sec. to  114.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25127     ( -0.331569   0.308355 )
Epeak [keV] : 106.870      ( -29.9508 339.851 )
Norm@50keV  : 7.16476E-03    ( -0.00209778   0.00325425 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.05 using 59 PHA bins.
# Reduced chi-squared =         0.5545 for     56 degrees of freedom 
# Null hypothesis probability =   9.972468e-01
 
Photon flux (15-150 keV)    in 186.5 sec: 0.602427 ( -0.029156  0.029183 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.1038e-06 ( -4.51201e-07  4.51377e-07 ) ergs/cm2

Band function

Time interval is from  -71.888 sec. to  114.640 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]    : 14.2980  (  )
R^2/D10^2   : 7.87924E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         141.17 using 59 PHA bins.
# Reduced chi-squared =         2.4766 for     57 degrees of freedom 
# Null hypothesis probability =   4.313966e-09
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.332e-07   5.511e-08
25- 50  2.404e-06   1.194e-07
50-150  3.271e-06   2.984e-07
15-150  6.308e-06   3.245e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 178.093       (-37.1165      -177.511)
Norm        : 2.49775       (-0.11563     0.126227)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          31.05 using 59 PHA bins.
# Reduced chi-squared =         0.5447 for     57 degrees of freedom 
# Null hypothesis probability =   9.980152e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.176e-06   7.656e-08
25- 50  2.232e-06   2.342e-07
50-150  4.707e-06   1.547e-06
15-150  8.115e-06   1.710e-06

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.52240        (-1.07153      1.22361)
R1^2/D10^2  : 0.783021        (-0.302632      0.585321)
kT2 [keV]   : 23.1848        (-2.98835      4.3704)
R2^2/D10^2  : 1.10301E-02    (-0.00486709   0.00704334)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          32.18 using 59 PHA bins.
# Reduced chi-squared =         0.5850 for     55 degrees of freedom 
# Null hypothesis probability =   9.940476e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.121e-06   3.270e-07
25- 50  2.184e-06   3.775e-07
50-150  4.506e-06   8.020e-07
15-150  7.812e-06   1.228e-06

Peak spectrum fit

Power-law model

Time interval is from    0.116 sec. to    1.116 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.05770     ( -0.174206   0.170926 )
Norm@50keV  : 4.36262E-02    ( -0.00445449   0.00444642 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.08 using 59 PHA bins.
# Reduced chi-squared =          1.072 for     57 degrees of freedom 
# Null hypothesis probability =   3.315314e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.04163 ( -0.52422  0.52487 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.62519e-07 ( -5.17951e-08  5.20576e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.116 sec. to    1.116 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.601460     ( -0.860024   0.613635 )
Epeak [keV] : 171.718      ( -82.0804 -171.71 )
Norm@50keV  : 7.07890E-02    ( -0.030321   0.0995995 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.96 using 59 PHA bins.
# Reduced chi-squared =          1.071 for     56 degrees of freedom 
# Null hypothesis probability =   3.340220e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.96962 ( -0.54001  0.53832 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from    0.116 sec. to    1.116 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]    : 20.2793  (-2.43802  2.96453)
R^2/D10^2   : 0.235498  (-0.0840272   0.121639)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.24 using 59 PHA bins.
# Reduced chi-squared =          1.250 for     57 degrees of freedom 
# Null hypothesis probability =   9.724515e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.857e-08   3.665e-09
25- 50  9.333e-08   1.435e-08
50-150  2.850e-07   4.745e-08
15-150  3.969e-07   5.945e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-21.7459      -200)
Norm        : 20.3848       (-2.15895     2.15895)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          82.24 using 59 PHA bins.
# Reduced chi-squared =          1.443 for     57 degrees of freedom 
# Null hypothesis probability =   1.597693e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.075e-08   2.812e-08
25- 50  9.762e-08   5.320e-08
50-150  2.141e-07   1.173e-07
15-150  3.625e-07   1.991e-07

Double BB

R1^2/D10^2  : 0.581976        (-0.282155      1833.71)
kT2 [keV]   : 79.2683        (-51.5247      -73.4949)
R2^2/D10^2  : 3.21962E-03    (-0.00362256   0.222555)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.36 using 59 PHA bins.
#Fit statistic : Chi-Squared =          61.29 using 59 PHA bins.
#Fit statistic : Chi-Squared =          61.22 using 59 PHA bins.
# Reduced chi-squared =          1.134 for     55 degrees of freedom 
# Reduced chi-squared =          1.114 for     55 degrees of freedom 
# Reduced chi-squared =          1.113 for     55 degrees of freedom 
# Null hypothesis probability =   2.310378e-01
# Null hypothesis probability =   2.607886e-01
# Null hypothesis probability =   2.626739e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.498e-08   1.566e-08
25- 50  8.346e-08   1.853e-08
50-150  3.087e-07   6.095e-08
15-150  4.272e-07   8.445e-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: 1.42934     ( -0.100462   0.100786 )
Norm@50keV  : 6.31946E-03    ( -0.000367355   0.000366755 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          34.11 using 59 PHA bins.
# Reduced chi-squared =         0.5984 for     57 degrees of freedom 
# Null hypothesis probability =   9.930574e-01
 
Photon flux (15-150 keV)    in 87.15 sec: 0.774875 ( -0.045567  0.0456248 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.29075e-06 ( -3.39412e-07  3.41326e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.863689     ( -0.452106   0.409744 )
Epeak [keV] : 103.092      ( -25.2603 125.34 )
Norm@50keV  : 1.19923E-02    ( -0.00436434   0.00772338 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          28.36 using 59 PHA bins.
# Reduced chi-squared =         0.5065 for     56 degrees of freedom 
# Null hypothesis probability =   9.992311e-01
 
Photon flux (15-150 keV)    in 87.15 sec: 0.753287 ( -0.048093  0.048081 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.07776e-06 ( -3.74736e-07  3.75555e-07 ) 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)  = 2.16e-06
S(50-100 keV) = 2.85e-06

T90 vs. Hardness ratio plot

T90                                   = 169.360000014305 sec.
Hardness ratio (energy fluence ratio) = 1.31944

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.3671
Count Ratio (50-100 keV) / (15-25 keV) = 0.958962

Mask shadow pattern

IMX = 3.366317756269722E-01, IMY = -4.834678728119247E-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:
-239.040000 -71.888000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.3701 -40.6084    3.8  33.1 -172.1  -3.2419  -3.0    7.9	Vela X-1                      
170.3382 -60.6279    7.2  26.1  127.9   1.8652   1.6    0.7	Cen X-3                       
187.0535 -62.7758    7.5  28.5  110.8   2.1747   1.5   10.9	GX 301-2                      
107.2808 -46.3839    3.0  52.4  175.2  16.5856   3.8 ------	UNKNOWN                       
195.3794 -12.5901    2.8  27.8  -18.6   4.1286   4.1 ------	UNKNOWN

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

Time interval of the image:
-71.888000 15.260590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4736 -40.5946    6.2  33.1 -172.1   0.7933   1.9    3.5	Vela X-1                      
170.0478 -60.5953    4.3  26.1  128.2  -1.2977  -2.7    8.1	Cen X-3                       
186.8791 -62.6828   10.1  28.4  110.9   0.7118   1.1    8.1	GX 301-2                      
228.0001 -29.0598    3.4  43.1   37.3   3.0039   3.4 ------	UNKNOWN                       
215.3234 -41.8999    0.8  30.5   55.2   9.1324  14.2 ------	UNKNOWN                       
147.0570 -14.9123    2.3  33.6 -120.6   2.6526   4.9 ------	UNKNOWN                       
175.5360   9.8903    2.3  44.9  -61.8   6.2074   5.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
66.860600 963.042300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.1279 -60.6673   20.4  33.0 -167.5   1.5753   0.6    6.1	Cen X-3                       
186.5526 -62.7280    4.1  26.8 -178.0   7.2657   2.8    3.8	GX 301-2                      
244.9963 -15.6379    0.5  36.6   25.9  75.8285  21.9    1.0	Sco X-1                       
256.1667 -37.7217    0.0  31.4   69.0   6.9877   1.7   11.3	4U 1700-377                   
256.4352 -36.4167   27.0  32.1   66.8  -1.9238  -0.4    0.4	GX 349+2                      
263.0129 -24.7488   29.0  42.7   54.6  -2.7840  -0.4    0.3	GX 1+4                        
264.6023 -44.5797    5.1  35.5   84.3 -11.6448  -2.3    9.8	4U 1735-44                    
263.1443 -33.9630    4.7  38.1   66.9 -16.7813  -2.4   10.9	GX 354-0                      
216.8616 -85.3530    3.3  43.5  152.6  22.9014   3.5 ------	UNKNOWN                       
209.0642   8.9016    2.8  51.1  -35.1  28.5490   4.2 ------	UNKNOWN

Plot creation:
Wed Oct  9 18:07:15 EDT 2019