batgrbproduct analysis for trigger=1046782

batgrbproduct Analysis for Trigger=1046782

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 23:22:13 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1046782
======================================================================

  Trigger: 01046782      Segment: 000

  BAT Trigger Time: 641829320   [s; MET]
      Trigger Stop: 641829384   [s; MET]
               UTC: 2021-05-04T13:54:53.041040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 222.376049651147   Dec: -30.5412476439381  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.45
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.45

  Flight Position:   [ source = BAT ]
    RA: 222.376049651147   Dec: -30.5412476439381  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 222.380218907227   Dec: -30.5566372634199  [deg; J2000]  
        { 14h 49m 31.3s , -30d 33' 23.9" }
         +/- 2.07561322345956 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.10311421513985 [arcmin] (formal 1-sigma fit error)
    SNR: 10.7164774153803
 
  Angular difference between Flight and Ground position is 0.948175 arcmin
 
  Partial Coding Fraction: 0.53125    [ including projection effects ]

  Duration
     T90: 142.983999967575 +/- 9.32908560628313
        Measured from: -14.1959999799728
                   to: 128.787999987602     [s; relative to TRIGTIME]
     T50: 66.62399995327 +/- 18.2639536124136
        Measured from: 28.7039999961853
                   to: 95.3279999494553     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 87.6840000152588     
                   to: 88.6840000152588     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -22.5720000267029     
                   to: 134.756000041962     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.437511   1.672824   1.280894   0.179709
           0.112079   0.110843   0.097835   0.086969 [error]
 Peak      0.030737   0.042601   0.027673   0.004077
           0.009221   0.009380   0.008290   0.007446 [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 4.23e-07 7.19e-07 9.33e-07 2.44e-06 2.74e-06 4.51e-06   erg/cm2
              Error 4.93e-08 5.23e-08 9.53e-08 5.23e-07 2.26e-07 6.04e-07   erg/cm2
Peak flux Power-law 3.19e-01 2.97e-01 1.92e-01 1.91e-01 8.87e-01 9.99e-01   ph/cm2/s
              Error 1.30e-01 7.43e-02 6.98e-02 1.45e-01 2.18e-01 2.53e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.84e-07 7.68e-07 9.50e-07 9.74e-07 2.60e-06 3.08e-06   erg/cm2
              Error 5.78e-08 6.57e-08 1.05e-07 7.31e-07 2.52e-07 7.70e-07   erg/cm2
Peak flux Cutoff-PL 3.25e-01 2.96e-01 1.89e-01 2.12e-01 8.89e-01 1.00e+00   ph/cm2/s
              Error -------- 7.46e-02 5.16e-02 -------- 2.18e-01 2.68e-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    1.626    0.128    -      -           1.87e-03 1.43e-04   61.750 57
CPL   0.991    0.535      75.6   56.8      4.02e-03 2.80e-03   56.940 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.633    0.485    -      -           6.83e-03 1.89e-03   43.800 57
CPL   2.191    1.248      71.8    0.0      3.37e-03 0.00e+00   43.100 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: 46.464000 sec.
T50 in the 50-300 keV band: 27.008000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  157.328  -22.572  134.756
T90   142.984  -14.196  128.788
T50    66.624   28.704   95.328
Peak    1.000   87.684   88.684

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
  222.3802   -30.5566   0.0179    24.3092   102.3842         2.1389541     10.716 TRIG_01046782                 
 
Foreground time interval of the image:
-13.899  72.701 (delta_t =  86.600 [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  -22.572 sec. to  134.756 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62618     ( -0.126829   0.128779 )
Norm@50keV  : 1.87043E-03    ( -0.00014321   0.000142139 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.75     using 59 bins.
 Reduced chi-squared = 1.08333
# Null hypothesis probability of 3.10e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 157.3 sec: 0.242357 ( -0.01755  0.017568 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.74358e-06 ( -2.24461e-07  2.27052e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -22.572 sec. to  134.756 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.990511     ( -0.567745   0.503197 )
Epeak [keV] : 75.6203      ( -17.0768 96.5284 )
Norm@50keV  : 4.01660E-03    ( -0.0017876   0.00382148 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.94     using 59 bins.
 Reduced chi-squared = 1.01679
# Null hypothesis probability of 4.40e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 157.3 sec: 0.234829 ( -0.018476  0.018485 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.59285e-06 ( -2.49766e-07  2.54088e-07 ) ergs/cm2

Band function

Time interval is from  -22.572 sec. to  134.756 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]    : 13.5973  (-1.20782  1.33786)
R^2/D10^2   : 3.77422E-02  (-0.0107712   0.0150045)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   91.58     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.49e-03 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.324e-07   3.099e-08
25- 50  8.392e-07   7.236e-08
50-150  1.006e-06   1.563e-07
15-150  2.078e-06   1.793e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 156.108       (-46.9799      -155.178)
Norm        : 0.997907       (-0.0781171     0.0951516)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.79     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.46e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.017e-07   4.640e-08
25- 50  7.489e-07   1.486e-07
50-150  1.502e-06   6.329e-07
15-150  2.653e-06   7.857e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.14408        (-1.31957      1.57441)
R1^2/D10^2  : 0.381739        (-0.205155      0.550031)
kT2 [keV]   : 21.1121        (-3.42666      5.39989)
R2^2/D10^2  : 6.19973E-03    (-0.00362534   0.00620837)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.22     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.04e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.933e-07   1.588e-07
25- 50  7.494e-07   1.807e-07
50-150  1.437e-06   5.575e-07
15-150  2.580e-06   8.206e-07

Peak spectrum fit

Power-law model

Time interval is from   87.684 sec. to   88.684 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.63282     ( -0.468722   0.502184 )
Norm@50keV  : 6.83250E-03    ( -0.00194132   0.00182936 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.80     using 59 bins.
 Reduced chi-squared = 0.768421
# Null hypothesis probability of 9.00e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.887201 ( -0.217696  0.217999 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.36664e-08 ( -1.86314e-08  1.92881e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   87.684 sec. to   88.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.19086     ( -1.56728   0.928019 )
Epeak [keV] : 71.7917      (   )
Norm@50keV  : 3.37232E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.10     using 59 bins.
 Reduced chi-squared = 0.769643
# Null hypothesis probability of 8.97e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.888996 ( -0.219059  0.217194 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.38874e-08 ( -2.29371e-08  1.38637e-08 ) ergs/cm2

Band function

Time interval is from   87.684 sec. to   88.684 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]    : 11.7627  (-4.04607  9.37109)
R^2/D10^2   : 0.218880  (-0.213081   0.803468)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.83     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.69e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.393e-09   3.746e-09
25- 50  1.965e-08   1.144e-08
50-150  1.613e-08   1.037e-08
15-150  4.217e-08   2.598e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 185.198       (-127.067      -185.058)
Norm        : 3.57894       (-0.888808     1.35833)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.33     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.90e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.995e-09   5.355e-09
25- 50  1.715e-08   1.002e-08
50-150  3.668e-08   2.112e-08
15-150  6.283e-08   3.532e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.21231        (-3.4515      3.17077)
R1^2/D10^2  : 1.75778        (-1.44973      66.5824)
kT2 [keV]   : 32.7262        (-15.7363      -32.7206)
R2^2/D10^2  : 5.60031E-03    (-0.00521105   0.0434534)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.27     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.74e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.035e-08   6.230e-09
25- 50  1.583e-08   8.815e-09
50-150  4.231e-08   2.339e-08
15-150  6.849e-08   3.426e-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: 1.61827     ( -0.21671   0.222504 )
Norm@50keV  : 1.52379E-03    ( -0.000200664   0.000197457 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.89     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.00e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 86.6 sec: 0.196938 ( -0.0239266  0.0239486 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23145e-06 ( -1.73109e-07  1.76296e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.33645     ( -0.973838   0.489023 )
Epeak [keV] : 110.318      ( -110.319 -110.319 )
Norm@50keV  : 2.15374E-03    ( -0.00134734   0.00483897 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.56     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.82e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 86.6 sec: 0.194382 ( -0.025145  0.024882 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.19848e-06 ( -1.98591e-07  1.48987e-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)  = 7.19e-07
S(50-100 keV) = 9.33e-07

T90 vs. Hardness ratio plot

T90                                   = 142.983999967575 sec.
Hardness ratio (energy fluence ratio) = 1.29764

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.16369
Count Ratio (50-100 keV) / (15-25 keV) = 0.89105

Mask shadow pattern

IMX = -9.687597821372994E-02, IMY = -4.411990679406040E-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:
-13.899400 72.700600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9582 -15.6448    1.2  35.3   54.4   2.8668   9.7    1.3	Sco X-1                       
253.0300  -5.2136    3.6  43.6   38.3   1.1251   3.2 ------	UNKNOWN                       
222.3802 -30.5567    1.1  24.3  102.4   2.1399  10.7 ------	UNKNOWN                       
257.6188  21.9645    2.5  56.9    6.5   3.8812   4.5 ------	UNKNOWN                       
162.5345 -24.6872    3.0  46.9 -164.3   1.1075   3.9 ------	UNKNOWN                       
242.3738  41.0968    2.3  59.1  -20.6   4.1613   5.0 ------	UNKNOWN                       
214.2233  40.8022    2.2  50.6  -44.4   3.5224   5.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
194.900600 963.098900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.2716 -60.4916    5.2  45.3  -54.8   7.3155   2.2    8.0	Cen X-3                       
186.8199 -62.8923    2.8  39.5  -63.3   8.0717   4.1    8.6	GX 301-2                      
244.9752 -15.6469    0.5  25.5  151.6  26.2393  24.5    0.5	Sco X-1                       
256.0001 -37.8499    1.4  28.7 -154.0   9.3332   8.3    0.7	4U 1700-377                   
256.3214 -36.6117    0.0  28.8 -156.6   1.7086   1.5   12.6	GX 349+2                      
262.9695 -24.7320    4.0  36.3 -176.9   3.3497   2.9    2.3	GX 1+4                        
264.9558 -44.4479    6.7  36.1 -143.1   2.0974   1.7    9.1	4U 1735-44                    
268.3650  -1.4328    5.2  52.4  157.4   8.3670   2.2    1.2	SW J1753.5-0127               
270.0949 -25.0439    8.7  42.3 -173.2   1.9856   1.3   10.5	GX 5-1                        
270.3903 -25.6800    8.9  42.4 -172.2   1.9772   1.3    6.1	GRS 1758-258                  
274.0146 -14.0043   13.2  50.2  174.8   2.1236   0.9    2.0	GX 17+2                       
275.7301 -30.3577    0.0  45.6 -163.8  -0.4280  -0.3   10.1	H1820-303                     
284.9116 -24.9633    5.7  55.0 -167.2   5.6379   2.0    7.2	HT1900.1-2455                 
262.8318 -33.8809   55.9  34.3 -161.4  -0.2100  -0.2    8.3	GX 354-0                      
178.2650 -10.9374    4.1  45.2   18.1   5.0374   2.8 ------	UNKNOWN                       
173.3984 -13.6557    3.1  47.9   11.5   6.5303   3.8 ------	UNKNOWN                       
269.1511 -31.2926    2.6  39.9 -164.3   5.2101   4.4 ------	UNKNOWN                       
158.5170 -53.6977    3.6  50.6  -44.5  11.9416   3.2 ------	UNKNOWN

Plot creation:
Fri Nov 11 22:09:29 EST 2022