batgrbproduct analysis for trigger=1164980

batgrbproduct Analysis for Trigger=1164980

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 15:01:00 EDT 2023
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1164980
======================================================================

  Trigger: 01164980      Segment: 000

  BAT Trigger Time: 703678772.224   [s; MET]
      Trigger Stop: 703678776.32   [s; MET]
               UTC: 2023-04-20T10:19:01.085120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 161.013191653554   Dec: 32.0865774853194  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.98
     Image Trigger?:     NO
     Rate S/N Ratio:     11.8743420870379  [ if not an image trigger ]
     Image S/N Ratio:    7.98

  Flight Position:   [ source = BAT ]
    RA: 161.013191653554   Dec: 32.0865774853194  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 161.038809668405   Dec: 32.1063487867989  [deg; J2000]  
        { 10h 44m 09.3s , +32d 06' 22.9" }
         +/- 1.44648280624915 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.620898497071233 [arcmin] (formal 1-sigma fit error)
    SNR: 17.9514450758647
 
  Angular difference between Flight and Ground position is 1.761487 arcmin
 
  Partial Coding Fraction: 1.03125    [ including projection effects ]

  Duration
     T90: 111.947999954224 +/- 11.9286545948353
        Measured from: -23.1999999284744
                   to: 88.7480000257492     [s; relative to TRIGTIME]
     T50: 56.0119999647141 +/- 6.8337339828217
        Measured from: 4
                   to: 60.0119999647141     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.41200006008148     
                   to: 2.41200006008148     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -34.135999917984     
                   to: 100.920000076294     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.443527   2.043745   1.212035   0.203400
           0.092693   0.095795   0.082834   0.070103 [error]
 Peak      0.033753   0.046634   0.042845   0.004048
           0.008481   0.008740   0.007999   0.006245 [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 4.46e-07 7.51e-07 9.63e-07 2.49e-06 2.85e-06 4.65e-06   erg/cm2
              Error 4.13e-08 4.38e-08 7.91e-08 4.25e-07 1.88e-07 4.94e-07   erg/cm2
Peak flux Power-law 2.88e-01 3.13e-01 2.43e-01 3.09e-01 9.60e-01 1.15e+00   ph/cm2/s
              Error 9.29e-02 6.64e-02 5.91e-02 1.47e-01 1.93e-01 2.40e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.07e-07 8.09e-07 9.71e-07 8.94e-07 2.66e-06 3.08e-06   erg/cm2
              Error 4.78e-08 5.74e-08 8.77e-08 5.68e-07 2.18e-07 6.05e-07   erg/cm2
Peak flux Cutoff-PL 1.62e-01 3.60e-01 3.01e-01 6.53e-02 8.78e-01 8.88e-01   ph/cm2/s
              Error 1.46e-01 8.79e-02 8.11e-02 9.57e-02 2.09e-01 2.25e-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    1.641    0.102    -      -           2.26e-03 1.39e-04   62.600 57
CPL   0.960    0.456      70.4   27.8      5.24e-03 3.16e-03   54.810 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.368    0.313    -      -           7.94e-03 1.61e-03   58.370 57
CPL  -1.067    2.671      67.5   27.9      1.09e-01 1.74e+00   52.370 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: 96.256000 sec.
T50 in the 50-300 keV band: 47.424000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  135.056  -34.136  100.920
T90   111.948  -23.200   88.748
T50    56.012    4.000   60.012
Peak    1.000    1.412    2.412

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
  161.0388    32.1063   0.0107    10.4531  -162.7648         2.5773292     17.951 TRIG_01164980                 
 
Foreground time interval of the image:
-34.136  38.077 (delta_t =  72.213 [sec])
Background time interval of the image:
-239.224 -34.136 (delta_t = 205.088 [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  -34.136 sec. to  100.920 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.64066     ( -0.101131   0.102242 )
Norm@50keV  : 2.26286E-03    ( -0.000139385   0.000138556 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.60     using 59 bins.
 Reduced chi-squared = 1.09825
# Null hypothesis probability of 2.84e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 135.1 sec: 0.294581 ( -0.017131  0.017145 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.84633e-06 ( -1.86855e-07  1.88579e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -34.136 sec. to  100.920 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.959623     ( -0.482533   0.429504 )
Epeak [keV] : 70.4133      ( -13.181 42.4359 )
Norm@50keV  : 5.24150E-03    ( -0.00211875   0.00420445 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   54.81     using 59 bins.
 Reduced chi-squared = 0.97875
# Null hypothesis probability of 5.20e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 135.1 sec: 0.285134 ( -0.01809  0.018084 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.66119e-06 ( -2.16432e-07  2.19032e-07 ) ergs/cm2

Band function

Time interval is from  -34.136 sec. to  100.920 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]    : 12.6041  (-0.868159  0.951313)
R^2/D10^2   : 6.02911E-02  (-0.0140887   0.0180268)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   99.90     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.85e-04 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.744e-07   2.911e-08
25- 50  9.135e-07   6.410e-08
50-150  9.006e-07   1.126e-07
15-150  2.089e-06   1.479e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 145.836       (-35.7451      51.5621)
Norm        : 1.21970       (-0.0800617     0.0963101)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.14     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 5.07e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.242e-07   3.479e-08
25- 50  7.830e-07   8.038e-08
50-150  1.528e-06   5.290e-07
15-150  2.735e-06   6.073e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.03216        (-1.31279      1.32234)
R1^2/D10^2  : 0.215023        (-0.0790508      0.153003)
kT2 [keV]   : 27.0741        (-6.21804      12.3771)
R2^2/D10^2  : 2.56009E-03    (-0.00184908   0.00446585)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.96     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.30e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.821e-07   7.086e-08
25- 50  8.477e-07   1.547e-07
50-150  1.490e-06   6.590e-07
15-150  2.719e-06   7.641e-07

Peak spectrum fit

Power-law model

Time interval is from    1.412 sec. to    2.412 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.36761     ( -0.3089   0.317272 )
Norm@50keV  : 7.93802E-03    ( -0.00161299   0.00160433 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.37     using 59 bins.
 Reduced chi-squared = 1.02404
# Null hypothesis probability of 4.25e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.959863 ( -0.192459  0.192737 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.72343e-08 ( -1.7193e-08  1.74832e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.412 sec. to    2.412 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.06728     ( -3.51049   1.83113 )
Epeak [keV] : 67.4664      ( -13.0517 42.714 )
Norm@50keV  : 0.109110    ( -0.112822   3.3634 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.37     using 59 bins.
 Reduced chi-squared = 0.935179
# Null hypothesis probability of 6.13e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.877890 ( -0.21178  0.20664 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53411e-08 ( -1.85209e-08  1.42085e-08 ) ergs/cm2

Band function

Time interval is from    1.412 sec. to    2.412 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]    : 16.8721  (-2.91318  3.64989)
R^2/D10^2   : 8.25357E-02  (-0.0406506   0.0744918)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   52.18     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.56e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.795e-09   1.983e-09
25- 50  2.109e-08   7.150e-09
50-150  4.276e-08   1.554e-08
15-150  6.864e-08   2.112e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-90.0059      -199.363)
Norm        : 3.98215       (-0.788477     0.788477)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   57.80     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  9.916e-09   5.925e-09
25- 50  1.908e-08   1.091e-08
50-150  4.183e-08   2.414e-08
15-150  7.083e-08   4.168e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.43449        (-2.45416      16.5464)
R1^2/D10^2  : 62.6408        (-56.8446      -56.8446)
kT2 [keV]   : 17.7641        (-3.24317      4.36722)
R2^2/D10^2  : 6.70437E-02    (-0.0664769   0.0391251)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   50.22     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.58e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.081e-09   2.697e-09
25- 50  1.966e-08   8.326e-09
50-150  4.446e-08   2.035e-08
15-150  7.120e-08   2.608e-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: 1.64670     ( -0.128308   0.130674 )
Norm@50keV  : 2.29093E-03    ( -0.000187505   0.000185978 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.54     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.86e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 72.21 sec: 0.298813 ( -0.0225732  0.0225858 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53906e-06 ( -1.33849e-07  1.35414e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.478376     ( -0.746969   0.627635 )
Epeak [keV] : 59.1105      ( -8.8298 19.3652 )
Norm@50keV  : 9.80506E-03    ( -0.00525344   0.0149653 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   51.08     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 6.61e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 72.21 sec: 0.284343 ( -0.023777  0.02376 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38402e-06 ( -1.48211e-07  1.54074e-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)  = 7.51e-07
S(50-100 keV) = 9.63e-07

T90 vs. Hardness ratio plot

T90                                   = 111.947999954224 sec.
Hardness ratio (energy fluence ratio) = 1.28229

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.4158
Count Ratio (50-100 keV) / (15-25 keV) = 0.839634

Mask shadow pattern

IMX = -1.762085707032564E-01, IMY = 5.466435392643043E-02

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:
-239.224000 -34.136000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
174.7132   7.8649    2.5  29.3  127.2   2.2598   4.7 ------	UNKNOWN                       
221.0907  68.7092    2.4  41.2  -23.3   2.6019   4.8 ------	UNKNOWN                       
119.9545  56.0931    2.7  39.4  -91.8   5.7377   4.2 ------	UNKNOWN                       
119.5392  64.7229    2.9  41.3  -78.8   5.4382   4.1 ------	UNKNOWN

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

Time interval of the image:
-34.136000 38.076590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
189.0577  -0.2863    2.4  40.5  105.7   3.0409   4.8 ------	UNKNOWN                       
179.8089  19.2726    2.1  19.0  109.7   0.9370   5.5 ------	UNKNOWN                       
203.6270  47.4348    2.1  25.2    8.0   0.8387   5.7 ------	UNKNOWN                       
194.6365  44.9114    2.3  18.6   10.2   0.7361   5.0 ------	UNKNOWN                       
161.0388  32.1064    0.6  10.5 -162.8   2.5765  17.9 ------	UNKNOWN                       
138.4734  40.4544    2.8  26.4 -119.9   0.8414   4.1 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
79.676600 962.886000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
204.0854  17.1520    2.4  41.6   64.5  16.4995   4.9 ------	UNKNOWN                       
188.5688  13.0582    2.4  31.6   84.7  11.0419   4.8 ------	UNKNOWN                       
132.3088   1.1142    3.4  41.1 -169.1   7.0926   3.4 ------	UNKNOWN                       
150.8505  81.5009    2.5  49.5  -38.0  21.2138   4.6 ------	UNKNOWN

Plot creation:
Fri Jun 16 09:08:43 EDT 2023