batgrbproduct analysis for trigger=1120270

batgrbproduct Analysis for Trigger=1120270

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): Wed Jun 14 12:31:15 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1120270
======================================================================

  Trigger: 01120270      Segment: 000

  BAT Trigger Time: 682111413.248   [s; MET]
      Trigger Stop: 682111417.344   [s; MET]
               UTC: 2022-08-13T19:23:03.576540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 81.5009850183749   Dec: -32.9854787271802  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.31
     Image Trigger?:     NO
     Rate S/N Ratio:     14.6969384566991  [ if not an image trigger ]
     Image S/N Ratio:    9.31

  Flight Position:   [ source = BAT ]
    RA: 81.5009850183749   Dec: -32.9854787271802  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 81.5318616030171   Dec: -33.0182804922456  [deg; J2000]  
        { 05h 26m 07.6s , -33d 01' 05.8" }
         +/- 1.59762721504959 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.748439264028011 [arcmin] (formal 1-sigma fit error)
    SNR: 15.5753984542622
 
  Angular difference between Flight and Ground position is 2.507464 arcmin
 
  Partial Coding Fraction: 0.9609375    [ including projection effects ]

  Duration
     T90: 16.5920000076294 +/- 1.91230227329654
        Measured from: -8.42000007629395
                   to: 8.17199993133545     [s; relative to TRIGTIME]
     T50: 6.567999958992 +/- 3.85143511084278
        Measured from: -0.860000014305115
                   to: 5.70799994468689     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.87599992752075     
                   to: 2.87599992752075     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -9.62800002098083     
                   to: 8.87199997901917     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.175953   0.293376   0.234420   0.057985
           0.027611   0.029020   0.026120   0.023943 [error]
 Peak      0.015077   0.032958   0.029060   0.010621
           0.006348   0.006953   0.006340   0.005765 [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 5.70e-08 1.10e-07 1.65e-07 5.35e-07 4.64e-07 8.66e-07   erg/cm2
              Error 1.04e-08 1.26e-08 2.48e-08 1.70e-07 6.05e-08 1.90e-07   erg/cm2
Peak flux Power-law 1.71e-01 2.03e-01 1.74e-01 2.54e-01 6.37e-01 8.02e-01   ph/cm2/s
              Error 7.19e-02 5.32e-02 4.98e-02 1.53e-01 1.52e-01 2.07e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.79e-08 1.22e-07 1.73e-07 1.46e-07 4.27e-07 4.90e-07   erg/cm2
              Error 1.29e-08 1.63e-08 2.84e-08 1.75e-07 6.59e-08 1.86e-07   erg/cm2
Peak flux Cutoff-PL 1.22e-01 2.20e-01 1.97e-01 8.29e-02 5.99e-01 6.22e-01   ph/cm2/s
              Error 1.12e-01 6.54e-02 6.32e-02 1.54e-01 1.66e-01 2.39e-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    1.417    0.191    -      -           2.61e-03 3.00e-04   55.070 57
CPL   0.387    0.960      77.5   70.3      8.65e-03 1.27e-02   50.690 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.220    0.410    -      -           5.41e-03 1.29e-03   44.570 57
CPL  -0.166    2.748      84.3  -27.2      2.40e-02 6.70e-01   43.190 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: 7.040000 sec.
T50 in the 50-300 keV band: 4.416000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   18.500   -9.628    8.872
T90    16.592   -8.420    8.172
T50     6.568   -0.860    5.708
Peak    1.000    1.876    2.876

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
   81.5319   -33.0183   0.0123    11.2603   -65.0072         0.8584158     15.575 TRIG_01120270                 
 
Foreground time interval of the image:
 -9.628   8.872 (delta_t =  18.500 [sec])
Background time interval of the image:
-239.248  -9.628 (delta_t = 229.620 [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 4.096000

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 4.096000

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 4.096000

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   -9.628 sec. to    8.872 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41705     ( -0.189279   0.192071 )
Norm@50keV  : 2.60814E-03    ( -0.000300892   0.000298742 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.07     using 59 bins.
 Reduced chi-squared = 0.96614
# Null hypothesis probability of 5.48e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 18.5 sec: 0.318879 ( -0.035436  0.035455 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.647e-07 ( -6.00197e-08  6.09686e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -9.628 sec. to    8.872 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.387050     ( -1.06615   0.852988 )
Epeak [keV] : 77.4842      ( -18.2712 122.366 )
Norm@50keV  : 8.65316E-03    ( -0.00537162   0.0200663 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.69     using 59 bins.
 Reduced chi-squared = 0.905179
# Null hypothesis probability of 6.76e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 18.5 sec: 0.304566 ( -0.037652  0.037457 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.28127e-07 ( -6.45204e-08  6.7348e-08 ) ergs/cm2

Band function

Time interval is from   -9.628 sec. to    8.872 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]    : 15.4744  (-1.85673  2.1643)
R^2/D10^2   : 3.39405E-02  (-0.0123288   0.0187887)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.31     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.64e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.131e-08   7.095e-09
25- 50  1.279e-07   1.996e-08
50-150  2.113e-07   4.651e-08
15-150  3.706e-07   5.476e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (-61.7673      -200)
Norm        : 1.30887       (-0.144268     0.144268)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.18     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.81e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.030e-08   3.348e-08
25- 50  1.160e-07   6.330e-08
50-150  2.544e-07   1.410e-07
15-150  4.307e-07   2.370e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.27279        (-1.60294      3.60414)
R1^2/D10^2  : 4.71524        (-4.5139      414.489)
kT2 [keV]   : 17.5442        (-2.52525      3.93178)
R2^2/D10^2  : 2.07260E-02    (-0.0113089   0.0113395)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   48.39     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 7.24e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.127e-08   2.223e-08
25- 50  1.134e-07   3.396e-08
50-150  2.397e-07   7.503e-08
15-150  4.044e-07   8.140e-08

Peak spectrum fit

Power-law model

Time interval is from    1.876 sec. to    2.876 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22050     ( -0.408046   0.412298 )
Norm@50keV  : 5.41380E-03    ( -0.00128756   0.00128352 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   44.57     using 59 bins.
 Reduced chi-squared = 0.78193
# Null hypothesis probability of 8.85e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.637368 ( -0.151567  0.151814 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.46185e-08 ( -1.46636e-08  1.50313e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.876 sec. to    2.876 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.166166     ( -3.90814   1.58782 )
Epeak [keV] : 84.2892      ( -29.4332 -83.7668 )
Norm@50keV  : 2.39772E-02    ( -0.0247485   1.31549 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.19     using 59 bins.
 Reduced chi-squared = 0.77125
# Null hypothesis probability of 8.95e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.598702 ( -0.168707  0.163188 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.03211e-08 ( -1.56937e-08  1.63949e-08 ) ergs/cm2

Band function

Time interval is from    1.876 sec. to    2.876 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]    : 17.9597  (-4.08226  5.90191)
R^2/D10^2   : 4.35198E-02  (-0.0265543   0.058758)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   43.63     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  2.813e-09   1.350e-09
25- 50  1.299e-08   6.189e-09
50-150  3.039e-08   1.445e-08
15-150  4.618e-08   2.016e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-91.5312      -199.363)
Norm        : 2.59623       (-0.62053     0.621947)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   45.96     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.52e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.465e-09   3.910e-09
25- 50  1.244e-08   7.540e-09
50-150  2.727e-08   1.630e-08
15-150  4.618e-08   2.725e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.23627        (-1.18401      2.58773)
R1^2/D10^2  : 3.04399E+04        (-28037.2      -28039.9)
kT2 [keV]   : 19.0712        (-4.4362      6.89944)
R2^2/D10^2  : 3.47008E-02    (-0.022108   0.0484188)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   39.46     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.43e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.788e-09   1.536e-09
25- 50  1.199e-08   6.788e-09
50-150  3.190e-08   1.783e-08
15-150  4.768e-08   2.326e-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: 1.41705     ( -0.189279   0.192071 )
Norm@50keV  : 2.60814E-03    ( -0.000300892   0.000298742 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   55.07     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.48e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 18.5 sec: 0.318873 ( -0.0354351  0.0354541 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.64637e-07 ( -5.99961e-08  6.09828e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.387038     ( -1.06615   0.85299 )
Epeak [keV] : 77.4840      ( -18.2712 122.352 )
Norm@50keV  : 8.65327E-03    ( -0.00537162   0.0200663 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.69     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.76e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 18.5 sec: 0.304544 ( -0.037646  0.037448 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.28294e-07 ( -6.46667e-08  6.74177e-08 ) 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)  = 1.10e-07
S(50-100 keV) = 1.65e-07

T90 vs. Hardness ratio plot

T90                                   = 16.5920000076294 sec.
Hardness ratio (energy fluence ratio) = 1.5

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.66735
Count Ratio (50-100 keV) / (15-25 keV) = 1.33229

Mask shadow pattern

IMX = 8.411997507449501E-02, IMY = 1.804552305637522E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 4.096000

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:
-239.248000 -9.628000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 29.6394 -21.2291    3.1  35.9  116.7   3.3996   3.8 ------	UNKNOWN                       
 37.2545  -5.4712    2.8  39.5  144.8   3.3511   4.1 ------	UNKNOWN                       
 83.9305 -51.8871    2.4  22.6   -7.5   1.6916   4.8 ------	UNKNOWN                       
 74.3044   5.1353    2.2  38.0 -151.7   2.6149   5.1 ------	UNKNOWN

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

Time interval of the image:
-9.628000 8.872000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 81.5319 -33.0183    0.7  11.3  -65.0   0.8586  15.5 ------	UNKNOWN                       
118.5788 -41.5566    2.2  40.7  -43.8   0.5639   5.3 ------	UNKNOWN                       
146.5851 -54.2317    2.1  57.7  -24.3   2.1318   5.6 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
78.852590 962.887800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6043  22.0042    2.0  55.0 -149.3  36.0094   5.7    1.7	Crab                          
135.3187 -40.5915    0.0  43.1  -35.4  -3.2724  -1.7    9.8	Vela X-1                      
 40.3120 -27.1122    3.1  35.9  116.7  12.3934   3.8 ------	UNKNOWN                       
 40.3062 -26.6510    3.3  36.1  117.4  12.8434   4.1 ------	UNKNOWN                       
 46.1167 -10.4995    2.7  39.5  144.9  12.2549   4.2 ------	UNKNOWN                       
101.9016 -49.8008    2.5  22.6   -7.5   5.5177   4.6 ------	UNKNOWN                       
 69.6391   3.9316    2.8  38.6 -170.8   6.6573   4.1 ------	UNKNOWN                       
131.5605 -57.4769    3.1  41.5  -10.1   6.8706   3.8 ------	UNKNOWN                       
 98.5123  12.2022    3.0  48.0 -129.0  22.2834   3.9 ------	UNKNOWN

Plot creation:
Wed Jun 14 14:02:13 EDT 2023