batgrbproduct analysis for trigger=1044382

batgrbproduct Analysis for Trigger=1044382

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 23:29:00 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1044382
======================================================================

  Trigger: 01044382      Segment: 000

  BAT Trigger Time: 640636504   [s; MET]
      Trigger Stop: 640636568   [s; MET]
               UTC: 2021-04-20T18:34:37.120380    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 254.360983528566   Dec: 42.5571753858575  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.66
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.66

  Flight Position:   [ source = BAT ]
    RA: 254.360983528566   Dec: 42.5571753858575  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 254.319248237532   Dec: 42.5675160368958  [deg; J2000]  
        { 16h 57m 16.6s , +42d 34' 03.1" }
         +/- 2.13658210707974 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.09994493449598 [arcmin] (formal 1-sigma fit error)
    SNR: 10.2823030220112
 
  Angular difference between Flight and Ground position is 1.945947 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 158.160000085831 +/- 29.6897030356576
        Measured from: -12.8400000333786
                   to: 145.320000052452     [s; relative to TRIGTIME]
     T50: 74.0640000104904 +/- 19.7721242218422
        Measured from: 14.8880000114441
                   to: 88.9520000219345     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 21.0199999809265     
                   to: 22.0199999809265     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -21.3040000200272     
                   to: 160.136000037193     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.627133   0.872941   0.742785   0.193734
           0.089420   0.091601   0.080209   0.069551 [error]
 Peak      0.024451   0.018113   0.010655   0.002775
           0.007125   0.007115   0.006145   0.005552 [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 1.96e-07 3.68e-07 5.32e-07 1.63e-06 1.51e-06 2.72e-06   erg/cm2
              Error 3.64e-08 4.20e-08 7.72e-08 5.06e-07 1.87e-07 5.66e-07   erg/cm2
Peak flux Power-law 2.37e-01 1.66e-01 7.62e-02 4.90e-02 5.02e-01 5.28e-01   ph/cm2/s
              Error 1.11e-01 5.91e-02 5.07e-02 6.98e-02 1.70e-01 1.83e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.81e-07 3.88e-07 5.48e-07 7.85e-07 1.45e-06 1.90e-06   erg/cm2
              Error 4.33e-08 5.21e-08 8.48e-08 7.42e-07 2.06e-07 7.85e-07   erg/cm2
Peak flux Cutoff-PL 2.27e-01 1.12e-01 3.14e-02 1.41e-02 3.84e-01 4.02e-01   ph/cm2/s
              Error 1.21e-01 1.18e-01 5.70e-02 4.67e-02 2.45e-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    1.471    0.190    -      -           8.73e-04 9.78e-05   48.100 57
CPL   0.963    0.781     102.0  -32.1      1.58e-03 1.76e-03   46.790 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.119    0.806    -      -           3.16e-03 1.61e-03   61.870 57
CPL   2.892    2.061     281.2    0.0      1.34e-03 0.00e+00   61.610 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  181.440  -21.304  160.136
T90   158.160  -12.840  145.320
T50    74.064   14.888   88.952
Peak    1.000   21.020   22.020

Click here for the BAT GCN circular template

Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minute to calcaulte

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  254.3192    42.5675   0.0188    27.0766    11.9744         1.4358452     10.282 TRIG_01044382                 
 
Foreground time interval of the image:
-14.299  74.301 (delta_t =  88.600 [sec])
Background time interval of the image:

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  -21.304 sec. to  160.136 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47066     ( -0.18924   0.191135 )
Norm@50keV  : 8.73005E-04    ( -9.80937e-05   9.75057e-05 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.10     using 59 bins.
 Reduced chi-squared = 0.84386
# Null hypothesis probability of 7.93e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 181.4 sec: 0.108151 ( -0.0119674  0.011983 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.51e-06 ( -1.8643e-07  1.88545e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -21.304 sec. to  160.136 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.963259     ( -0.923551   0.637882 )
Epeak [keV] : 101.999      ( -37.8818 -101.999 )
Norm@50keV  : 1.57717E-03    ( -0.000771777   0.00274121 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   46.79     using 59 bins.
 Reduced chi-squared = 0.835536
# Null hypothesis probability of 8.05e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 181.4 sec: 0.105752 ( -0.0124863  0.012505 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45217e-06 ( -2.05454e-07  2.0691e-07 ) ergs/cm2

Band function

Time interval is from  -21.304 sec. to  160.136 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]    : 15.3098  (-1.96198  2.30669)
R^2/D10^2   : 1.15560E-02  (-0.00448509   0.00712985)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.08     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.32e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.025e-07   2.198e-08
25- 50  4.150e-07   6.231e-08
50-150  6.678e-07   1.459e-07
15-150  1.185e-06   1.681e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-66.1385      -199.363)
Norm        : 0.444261       (-0.0481701     0.0482581)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.58     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.09e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.007e-07   1.124e-07
25- 50  3.860e-07   2.102e-07
50-150  8.466e-07   4.647e-07
15-150  1.433e-06   5.774e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.69785        (-2.48927      3.9207)
R1^2/D10^2  : 0.189075        (-0.15027      1.99634)
kT2 [keV]   : 21.2418        (-4.56296      13.2245)
R2^2/D10^2  : 3.14194E-03    (-0.00263797   0.00474574)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.12     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.66e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.852e-07   1.011e-07
25- 50  3.720e-07   1.400e-07
50-150  8.514e-07   4.698e-07
15-150  1.409e-06   6.268e-07

Peak spectrum fit

Power-law model

Time interval is from   21.020 sec. to   22.020 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.11944     ( -0.678538   0.933715 )
Norm@50keV  : 3.16189E-03    ( -0.0017101   0.00150599 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.87     using 59 bins.
 Reduced chi-squared = 1.08544
# Null hypothesis probability of 3.06e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.502319 ( -0.169728  0.169737 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.94408e-08 ( -1.26493e-08  1.36416e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   21.020 sec. to   22.020 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.89151     ( -3.78773   0.333503 )
Epeak [keV] : 281.185      (   )
Norm@50keV  : 1.33891E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.61     using 59 bins.
 Reduced chi-squared = 1.10018
# Null hypothesis probability of 2.82e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.384059 ( -0.207679  0.281689 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.98119e-08 ( -1.01842e-08  1.1395e-08 ) ergs/cm2

Band function

Time interval is from   21.020 sec. to   22.020 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]    : 10.8085  (-3.94031  5.32045)
R^2/D10^2   : 0.170775  (-0.170665   0.770608)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.81     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.23e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.153e-09   2.633e-09
25- 50  1.148e-08   7.195e-09
50-150  7.472e-09   5.825e-09
15-150  2.310e-08   1.480e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 60.7770       (-60.7768      -60.7768)
Norm        : 2.59401       (-1.14103     2.72221)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.36     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.91e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.533e-09   4.106e-09
25- 50  9.982e-09   6.300e-09
50-150  1.148e-08   9.855e-09
15-150  2.799e-08   1.894e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.16119        (-1.46227      2.5392)
R1^2/D10^2  : 225.817        (-370.148      -372.889)
kT2 [keV]   : 13.4722        (-4.55897      9.73698)
R2^2/D10^2  : 6.47082E-02    (-0.059075   0.25641)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.63     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.11e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.502e-09   3.403e-09
25- 50  9.056e-09   5.765e-09
50-150  1.042e-08   7.120e-09
15-150  2.598e-08   1.595e-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: 1.46183     ( -0.23746   0.240388 )
Norm@50keV  : 1.09724E-03    ( -0.000149722   0.000148461 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.15     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.97e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 88.6 sec: 0.135622 ( -0.0182301  0.0182668 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.28289e-07 ( -1.39751e-07  1.41627e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.45908     ( -0.878258   1.61483 )
Epeak [keV] : 9989.98      ( -9987.69 -9987.69 )
Norm@50keV  : 1.10081E-03    ( -0.000149489   0.00208879 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.15     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.61e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 88.6 sec: 0.135431 ( -0.018772  0.018323 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.31168e-07 ( -1.56177e-07  1.3826e-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)  = 3.68e-07
S(50-100 keV) = 5.32e-07

T90 vs. Hardness ratio plot

T90                                   = 158.160000085831 sec.
Hardness ratio (energy fluence ratio) = 1.44565

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.39196
Count Ratio (50-100 keV) / (15-25 keV) = 1.18441

Mask shadow pattern

IMX = 5.000862298625791E-01, IMY = -1.060633959254108E-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:

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

Time interval of the image:
-14.299400 74.300600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5784  35.3883    3.5  32.9   20.4   0.5732   3.3    6.5	Her X-1                       
299.4821  35.0340    6.7  55.8  -21.7   0.8595   1.8   11.4	Cyg X-1                       
254.3192  42.5675    1.1  27.1   12.0   1.4362  10.3 ------	UNKNOWN                       
110.4945  51.7444    2.6  55.3 -144.7   3.0987   4.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
124.300590 718.602900
721.000000 963.094800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4023  35.2971    7.1   7.3   41.2   0.9663   1.6    3.8	Her X-1                       
268.3934  -1.3997    8.4  45.7   21.7   1.6885   1.4    3.5	SW J1753.5-0127               
288.8918  11.0169   11.2  43.5  -12.4   1.1408   1.0    7.0	GRS 1915+105                  
299.6124  35.2361    1.7  35.5  -52.1   7.0063   6.8    2.3	Cyg X-1                       
308.1752  40.9278    5.0  39.5  -65.0   3.9160   2.3    3.3	Cyg X-3                       
274.6911 -10.0521    2.9  55.8   17.1  11.4604   3.9 ------	UNKNOWN                       
272.8521  22.2216    3.6  25.5   -1.5   2.1259   3.2 ------	UNKNOWN                       
156.7287  60.9533    3.5  57.1 -173.5   8.3253   3.3 ------	UNKNOWN                       
306.8168  16.0796    2.8  51.8  -34.4   8.2587   4.0 ------	UNKNOWN

Plot creation:
Fri Nov 11 22:14:49 EST 2022