batgrbproduct analysis for trigger=1044426

batgrbproduct Analysis for Trigger=1044426

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 23:27:00 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1044426
======================================================================

  Trigger: 01044426      Segment: 000

  BAT Trigger Time: 640657677.184   [s; MET]
      Trigger Stop: 640657679.232   [s; MET]
               UTC: 2021-04-21T00:27:30.302980    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 104.908402667149   Dec: 4.93417169695035  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.17
     Image Trigger?:     NO
     Rate S/N Ratio:     11.4455231422596  [ if not an image trigger ]
     Image S/N Ratio:    10.17

  Flight Position:   [ source = BAT ]
    RA: 104.908402667149   Dec: 4.93417169695035  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 104.88322254258   Dec: 4.92855764403151  [deg; J2000]  
        { 06h 59m 32.0s , +04d 55' 42.8" }
         +/- 1.14388246263258 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.476040365481007 [arcmin] (formal 1-sigma fit error)
    SNR: 25.1024654255154
 
  Angular difference between Flight and Ground position is 1.542445 arcmin
 
  Partial Coding Fraction: 0.4453125    [ including projection effects ]

  Duration
     T90: 79.1999999284744 +/- 26.8281989732373
        Measured from: -18.3359999656677
                   to: 60.8639999628067     [s; relative to TRIGTIME]
     T50: 15.808000087738 +/- 3.31756052546882
        Measured from: -7.53600001335144
                   to: 8.2720000743866     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.46799993515015     
                   to: 3.46799993515015     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.7439999580383     
                   to: 73.2159999608994     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.529624   1.622713   0.698580   0.175097
           0.087951   0.090480   0.076335   0.064500 [error]
 Peak      0.073339   0.101636   0.051456   0.012165
           0.011255   0.012371   0.009740   0.007540 [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 5.42e-07 6.75e-07 6.12e-07 9.59e-07 2.16e-06 2.79e-06   erg/cm2
              Error 5.22e-08 4.57e-08 7.33e-08 2.26e-07 1.68e-07 3.09e-07   erg/cm2
Peak flux Power-law 8.55e-01 6.78e-01 3.62e-01 2.81e-01 2.02e+00 2.18e+00   ph/cm2/s
              Error 1.69e-01 9.76e-02 7.43e-02 1.05e-01 2.93e-01 3.14e-01   ph/cm2/s
 
Fluence   Cutoff-PL -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Cutoff-PL 7.04e-01 8.42e-01 3.88e-01 5.47e-02 1.98e+00 1.99e+00   ph/cm2/s
              Error 1.99e-01 1.48e-01 9.96e-02 7.77e-02 2.96e-01 3.02e-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    2.143    0.131    -      -           2.44e-03 2.11e-04   63.710 57
CPL   2.132    0.132    9999.4    0.0      2.46e-03 0.00e+00   63.740 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.905    0.224    -      -           1.41e-02 2.30e-03   56.770 57
CPL   0.108    1.408      46.6   10.9      1.42e-01 6.28e-01   48.770 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: 31.680000 sec.
T50 in the 50-300 keV band: 18.432000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   94.960  -21.744   73.216
T90    79.200  -18.336   60.864
T50    15.808   -7.536    8.272
Peak    1.000    2.468    3.468

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
  104.8832     4.9286   0.0077    34.1798    24.9301         3.7244045     25.102 TRIG_01044426                 
 
Foreground time interval of the image:
-21.744  23.517 (delta_t =  45.261 [sec])
Background time interval of the image:
-239.184 -21.744 (delta_t = 217.440 [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  -21.744 sec. to   73.216 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.14293     ( -0.128413   0.133211 )
Norm@50keV  : 2.43501E-03    ( -0.000212842   0.000209833 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.71     using 59 bins.
 Reduced chi-squared = 1.11772
# Null hypothesis probability of 2.52e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 94.96 sec: 0.391447 ( -0.026619  0.026638 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.15859e-06 ( -1.6732e-07  1.69503e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -21.744 sec. to   73.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.13245     ( -0.119649   0.144751 )
Epeak [keV] : 9999.36      (   )
Norm@50keV  : 2.45667E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.74     using 59 bins.
 Reduced chi-squared = 1.13821
# Null hypothesis probability of 2.23e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 94.96 sec: 0.378954 ( -0.02844  0.028413 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Band function

Time interval is from  -21.744 sec. to   73.216 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]    : 9.06148  (-0.662826  0.716016)
R^2/D10^2   : 0.260538  (-0.0683496   0.0925492)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   85.80     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.13e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.969e-07   4.563e-08
25- 50  8.526e-07   6.619e-08
50-150  3.321e-07   6.609e-08
15-150  1.582e-06   1.277e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 51.6579       (-8.92083      12.1334)
Norm        : 2.16957       (-0.247576     0.303383)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.06     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.00e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.074e-07   4.914e-08
25- 50  7.372e-07   5.232e-08
50-150  7.378e-07   1.291e-07
15-150  1.982e-06   1.714e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.18879        (-1.47307      1.12519)
R1^2/D10^2  : 0.554772        (-0.215332      0.585627)
kT2 [keV]   : 28.4962        (-12.7597      69.3359)
R2^2/D10^2  : 1.63988E-03    (-0.00149246   0.0151134)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.97     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.02e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.696e-07   7.915e-08
25- 50  7.706e-07   1.405e-07
50-150  8.376e-07   3.981e-07
15-150  2.078e-06   5.228e-07

Peak spectrum fit

Power-law model

Time interval is from    2.468 sec. to    3.468 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.90520     ( -0.216109   0.231347 )
Norm@50keV  : 1.40632E-02    ( -0.00232672   0.00228206 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.77     using 59 bins.
 Reduced chi-squared = 0.995965
# Null hypothesis probability of 4.84e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 2.02282 ( -0.29281  0.29293 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.29318e-07 ( -2.08829e-08  2.10966e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.468 sec. to    3.468 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.108457     ( -1.65311   1.16323 )
Epeak [keV] : 46.6161      ( -8.16965 13.6602 )
Norm@50keV  : 0.142076    ( -0.142979   1.11356 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.77     using 59 bins.
 Reduced chi-squared = 0.870893
# Null hypothesis probability of 7.42e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 1.98206 ( -0.29618  0.29574 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20224e-07 ( -2.09741e-08  2.1963e-08 ) ergs/cm2

Band function

Time interval is from    2.468 sec. to    3.468 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]    : 11.2341  (-1.47617  1.70513)
R^2/D10^2   : 0.682969  (-0.285906   0.474233)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.59     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.78e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.808e-08   4.590e-09
25- 50  5.251e-08   1.107e-08
50-150  3.804e-08   1.202e-08
15-150  1.086e-07   2.009e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 78.1597       (-24.8312      44.9592)
Norm        : 9.90871       (-1.84674     2.23877)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.67     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.74e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.567e-08   4.875e-09
25- 50  4.202e-08   6.430e-09
50-150  5.839e-08   3.013e-08
15-150  1.261e-07   2.821e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.27079        (-8.32002      4.85724)
R1^2/D10^2  : 1.39957        (-1.32351      -1.33911)
kT2 [keV]   : 18.6692        (-19.6026      -19.6028)
R2^2/D10^2  : 4.96464E-02    (-0.0382914   0.654349)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.76     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.11e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.115e-08   1.254e-08
25- 50  4.910e-08   3.137e-08
50-150  5.110e-08   2.994e-08
15-150  1.214e-07   7.140e-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: 2.06282     ( -0.112746   0.116002 )
Norm@50keV  : 4.78722E-03    ( -0.000350901   0.000346517 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   70.53     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.07e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 45.26 sec: 0.739626 ( -0.0453984  0.0454543 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.00647e-06 ( -1.35886e-07  1.3704e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49626     ( -0.559345   0.48539 )
Epeak [keV] : 37.6917      ( -30.7994 11.2019 )
Norm@50keV  : 1.00438E-02    ( -0.00464601   0.0108298 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   66.49     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.59e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 45.26 sec: 0.720517 ( -0.048113  0.048116 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.89974e-06 ( -1.60578e-07  1.63248e-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)  = 6.75e-07
S(50-100 keV) = 6.12e-07

T90 vs. Hardness ratio plot

T90                                   = 79.1999999284744 sec.
Hardness ratio (energy fluence ratio) = 0.906667

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.06086
Count Ratio (50-100 keV) / (15-25 keV) = 0.4567

Mask shadow pattern

IMX = 6.158086990259720E-01, IMY = -2.862423554189181E-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:
-239.184000 -21.744000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6337  22.0220    0.6  44.0  -15.4   8.8795  20.7    0.5	Crab                          
 87.2798  19.2404    2.7  41.4  -10.1   1.5981   4.3 ------	UNKNOWN

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

Time interval of the image:
-21.744000 23.516590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.5217  22.0562   27.7  44.0  -15.5  -0.0666  -0.4    6.7	Crab                          
104.8832   4.9286    0.5  34.2   24.9   3.7252  25.1 ------	UNKNOWN                       
 32.0933 -55.5871    2.2  50.5 -161.0   1.0231   5.2 ------	UNKNOWN                       
 24.8496 -39.2538    2.3  52.2 -139.2   2.2571   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
77.116590 483.616600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6311  22.0145    0.4  26.7  -59.1  16.6718  28.2    0.1	Crab                          
143.6054  -8.3299    3.7  40.8   98.0   4.9131   3.1 ------	UNKNOWN                       
145.2109   9.1288    6.7  40.2   70.9   3.1567   1.7 ------	UNKNOWN                       
122.1410 -41.3478    2.9  48.9  152.0   5.5198   4.0 ------	UNKNOWN                       
110.4368 -45.7212    3.3  50.9  164.2   5.2659   3.5 ------	UNKNOWN                       
 81.0799 -40.1381    4.0  50.1 -167.1   3.1660   2.9 ------	UNKNOWN                       
 84.4844  22.9084    2.8  26.7  -56.5   2.2305   4.1 ------	UNKNOWN                       
 66.1696 -40.3651    3.0  57.6 -156.4   8.7421   3.8 ------	UNKNOWN

Plot creation:
Sat Jul 30 07:04:20 EDT 2022