batgrbproduct analysis for trigger=1051453

batgrbproduct Analysis for Trigger=1051453

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 v2.48
    Process Start Time (local time): Fri Jul 29 23:08:20 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1051453
======================================================================

  Trigger: 01051453      Segment: 000

  BAT Trigger Time: 643792096   [s; MET]
      Trigger Stop: 643792192   [s; MET]
               UTC: 2021-05-27T07:07:48.910100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 172.354664489761   Dec: 31.618254634337  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.78
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.78

  Flight Position:   [ source = BAT ]
    RA: 172.354664489761   Dec: 31.618254634337  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 172.347546324808   Dec: 31.6280234850647  [deg; J2000]  
        { 11h 29m 23.4s , +31d 37' 40.9" }
         +/- 1.81750004971886 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.631952065766921 [arcmin] (formal 1-sigma fit error)
    SNR: 12.955095560891
 
  Angular difference between Flight and Ground position is 0.689788 arcmin
 
  Partial Coding Fraction: 0.90625    [ including projection effects ]

  Duration
     T90: 64.4639999866486 +/- 10.6299790530767
        Measured from: -11.9359999895096
                   to: 52.527999997139     [s; relative to TRIGTIME]
     T50: 40.4199999570847 +/- 10.6617319617024
        Measured from: 1.46399998664856
                   to: 41.8839999437332     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 17.8639999628067     
                   to: 18.8639999628067     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -18.3200000524521     
                   to: 65.7120000123978     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.609067   0.501267   0.271803  -0.016817
           0.055054   0.056674   0.049806   0.045736 [error]
 Peak      0.018365   0.022294   0.015860  -0.001000
           0.006121   0.006162   0.005625   0.005032 [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 1.92e-07 2.22e-07 1.84e-07 2.57e-07 6.91e-07 8.57e-07   erg/cm2
              Error 2.89e-08 2.74e-08 4.50e-08 1.20e-07 1.02e-07 1.78e-07   erg/cm2
Peak flux Power-law 1.62e-01 1.49e-01 9.45e-02 9.21e-02 4.44e-01 4.97e-01   ph/cm2/s
              Error 8.28e-02 4.96e-02 4.49e-02 9.06e-02 1.46e-01 1.69e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.87e-07 2.32e-07 1.76e-07 1.18e-07 6.61e-07 7.14e-07   erg/cm2
              Error 3.00e-08 3.29e-08 5.13e-08 1.58e-07 1.13e-07 2.09e-07   erg/cm2
Peak flux Cutoff-PL 1.59e-01 1.51e-01 9.51e-02 7.52e-02 4.41e-01 4.81e-01   ph/cm2/s
              Error 8.85e-02 5.76e-02 7.19e-02 1.02e-01 1.47e-01 1.83e-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    2.268    0.247    -      -           8.65e-04 1.53e-04   48.740 57
CPL   1.868    0.598      12.7   23.3      1.52e-03 2.85e-03   48.160 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.654    0.621    -      -           3.39e-03 1.26e-03   43.570 57
CPL   1.602    1.819     315.1    0.0      3.63e-03 1.19e-01   43.560 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   84.032  -18.320   65.712
T90    64.464  -11.936   52.528
T50    40.420    1.464   41.884
Peak    1.000   17.864   18.864

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
  172.3475    31.6280   0.0150    25.8945  -168.5320         1.4837795     12.955 TRIG_01051453                 
 
Foreground time interval of the image:
-18.320  65.712 (delta_t =  84.032 [sec])
Background time interval of the image:
-239.000 -18.320 (delta_t = 220.680 [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 96.000000

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 96.000000

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 96.000000

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  -18.320 sec. to   65.712 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.26796     ( -0.235494   0.25761 )
Norm@50keV  : 8.65069E-04    ( -0.000154536   0.000151016 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.74     using 59 bins.
 Reduced chi-squared = 0.855088
# Null hypothesis probability of 7.74e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 84.03 sec: 0.148546 ( -0.016927  0.016928 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.90867e-07 ( -9.99117e-08  1.03506e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -18.320 sec. to   65.712 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86787     ( -1.05511   0.141548 )
Epeak [keV] : 12.7057      ( -12.0102 34.651 )
Norm@50keV  : 1.51514E-03    ( -0.000511266   0.00519152 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.16     using 59 bins.
 Reduced chi-squared = 0.86
# Null hypothesis probability of 7.63e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 84.03 sec: 0.148346 ( -0.016755  0.017212 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.61096e-07 ( -1.10828e-07  1.15964e-07 ) ergs/cm2

Band function

Time interval is from  -18.320 sec. to   65.712 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]    : 8.10914  (-1.20946  1.41015)
R^2/D10^2   : 0.149844  (-0.0698893   0.136605)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   65.91     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.96e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.512e-07   2.790e-08
25- 50  2.709e-07   4.857e-08
50-150  7.436e-08   2.830e-08
15-150  4.965e-07   7.769e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 43.5881       (-12.0454      19.2399)
Norm        : 0.904683       (-0.179431     0.24992)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.98     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.66e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.793e-07   2.542e-08
25- 50  2.446e-07   3.525e-08
50-150  2.073e-07   7.622e-08
15-150  6.312e-07   1.085e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.39704        (-1.25191      1.39467)
R1^2/D10^2  : 1.30786        (-0.878068      4.81429)
kT2 [keV]   : 15.0418        (-3.73729      6.40312)
R2^2/D10^2  : 9.38679E-03    (-0.00724592   0.0225073)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.90     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.73e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.926e-07   9.889e-08
25- 50  2.216e-07   1.028e-07
50-150  2.309e-07   1.385e-07
15-150  6.451e-07   3.370e-07

Peak spectrum fit

Power-law model

Time interval is from   17.864 sec. to   18.864 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.65442     ( -0.592877   0.648794 )
Norm@50keV  : 3.39196E-03    ( -0.00129424   0.00122175 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.57     using 59 bins.
 Reduced chi-squared = 0.764386
# Null hypothesis probability of 9.05e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.443572 ( -0.146045  0.146188 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.1537e-08 ( -1.20798e-08  1.27575e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   17.864 sec. to   18.864 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.60175     ( -2.65643   0.982396 )
Epeak [keV] : 315.136      ( -276.653 -276.653 )
Norm@50keV  : 3.62663E-03    ( -0.00372858   0.233527 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.56     using 59 bins.
 Reduced chi-squared = 0.777857
# Null hypothesis probability of 8.87e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.441298 ( -0.148682  0.145739 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.10857e-08 ( -1.35275e-08  1.30897e-08 ) ergs/cm2

Band function

Time interval is from   17.864 sec. to   18.864 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]    : 9.83271  (-3.50838  10.5897)
R^2/D10^2   : 0.216418  (-0.212549   0.923764)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.62     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.35e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.236e-09   2.677e-09
25- 50  1.028e-08   6.535e-09
50-150  5.109e-09   4.037e-09
15-150  1.963e-08   1.258e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 168.927       (-165.665      -165.665)
Norm        : 1.80385       (-0.606742     1.15071)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.61     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.04e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.487e-09   2.768e-09
25- 50  8.595e-09   5.285e-09
50-150  1.863e-08   1.188e-08
15-150  3.171e-08   1.919e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.64887        (-3.01809      4.49709)
R1^2/D10^2  : 0.723372        (-0.613598      6.58665)
kT2 [keV]   : 30.9652        (-17.43      -30.9533)
R2^2/D10^2  : 2.90761E-03    (-0.00289324   0.0196395)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   42.35     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.94e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.282e-09   3.304e-09
25- 50  8.677e-09   4.957e-09
50-150  1.869e-08   1.163e-08
15-150  3.264e-08   1.693e-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: 2.26796     ( -0.235494   0.25761 )
Norm@50keV  : 8.65069E-04    ( -0.000154536   0.000151016 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.74     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.74e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 84.03 sec: 0.148530 ( -0.016926  0.0169261 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.90717e-07 ( -9.98335e-08  1.03512e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.86671     ( -1.05418   0.141654 )
Epeak [keV] : 12.7835      ( -12.6034 34.3981 )
Norm@50keV  : 1.51746E-03    ( -0.000512259   0.00519479 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.16     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.63e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 84.03 sec: 0.146391 ( -0.017439  0.0088 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.61266e-07 ( -1.10913e-07  1.20728e-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)  = 2.22e-07
S(50-100 keV) = 1.84e-07

T90 vs. Hardness ratio plot

T90                                   = 64.4639999866486 sec.
Hardness ratio (energy fluence ratio) = 0.828829

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.823008
Count Ratio (50-100 keV) / (15-25 keV) = 0.446261

Mask shadow pattern

IMX = -4.757645259286623E-01, IMY = 9.651829944906765E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 96.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 96.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 96.000000

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 -18.320000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
189.6189   4.0047    2.9  48.4  151.5   3.5344   4.0 ------	UNKNOWN                       
260.0341  58.3873    2.9  36.6   19.5   1.4271   4.0 ------	UNKNOWN                       
181.9985  57.1557    2.4   8.4  -83.8   1.0469   4.7 ------	UNKNOWN                       
150.0746  40.3320    3.3  31.9 -128.4   1.2560   3.5 ------	UNKNOWN                       
339.6598  68.3360    2.9  56.8  -19.7   4.0209   4.0 ------	UNKNOWN                       
125.5039  50.0180    3.9  41.3  -98.9   3.6815   3.0 ------	UNKNOWN

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

Time interval of the image:
-18.320000 65.712000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
202.5974  33.3391    1.9  20.0  124.0   0.8022   6.2 ------	UNKNOWN                       
172.3476  31.6280    0.9  25.9 -168.5   1.4836  13.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
161.900590 704.200610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4207  35.3138   18.6  15.4   57.2  -0.2836  -0.6    2.5	Her X-1                       
299.5303  35.2056    2.3  44.0    3.9   3.8328   4.9    3.0	Cyg X-1                       
308.2336  41.0082    9.1  46.6   -8.2   0.9466   1.3    6.5	Cyg X-3                       
290.7060  34.4497    2.6  38.5   11.1   2.8805   4.4 ------	UNKNOWN                       
189.0844  24.4087    3.7  47.3  179.7   2.8394   3.1 ------	UNKNOWN

Plot creation:
Sat Jul 30 07:00:02 EDT 2022