batgrbproduct analysis for trigger=1230423

batgrbproduct Analysis for Trigger=1230423

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): Sat Oct 19 15:16:03 EDT 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1230423
======================================================================

  Trigger: 01230423      Segment: 000

  BAT Trigger Time: 738168225.408   [s; MET]
      Trigger Stop: 738168229.504   [s; MET]
               UTC: 2024-05-23T14:43:11.908720    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 33.5671478971774   Dec: -22.0204592880628  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.5
     Image Trigger?:     NO
     Rate S/N Ratio:     8.54400374531753  [ if not an image trigger ]
     Image S/N Ratio:    8.5

  Flight Position:   [ source = BAT ]
    RA: 33.5671478971774   Dec: -22.0204592880628  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 33.5367072741935   Dec: -22.0515412262457  [deg; J2000]  
        { 02h 14m 08.8s , -22d 03' 05.5" }
         +/- 1.62362450435195 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.772795992880624 [arcmin] (formal 1-sigma fit error)
    SNR: 15.2203510610822
 
  Angular difference between Flight and Ground position is 2.518771 arcmin
 
  Partial Coding Fraction: 0.4726562    [ including projection effects ]

  Duration
     T90: 41.9319999217987 +/- 8.65178382544062
        Measured from: -3.92799997329712
                   to: 38.0039999485016     [s; relative to TRIGTIME]
     T50: 23.1159999370575 +/- 5.50600587724988
        Measured from: 3.35600006580353
                   to: 26.472000002861     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.184000015258789     
                   to: 1.18400001525879     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.36800003051758     
                   to: 46.2999999523163     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.754100   0.740629   0.432950   0.000600
           0.067872   0.070286   0.059797   0.050944 [error]
 Peak      0.034018   0.045506   0.026948   0.004316
           0.009673   0.010416   0.008529   0.006949 [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 2.64e-07 3.43e-07 3.27e-07 5.53e-07 1.12e-06 1.49e-06   erg/cm2
              Error 3.95e-08 3.52e-08 5.77e-08 1.93e-07 1.33e-07 2.56e-07   erg/cm2
Peak flux Power-law 4.09e-01 3.35e-01 1.86e-01 1.52e-01 9.98e-01 1.08e+00   ph/cm2/s
              Error 1.65e-01 8.65e-02 7.11e-02 1.16e-01 2.59e-01 2.76e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.49e-07 3.63e-07 3.29e-07 2.64e-07 1.08e-06 1.21e-06   erg/cm2
              Error 4.60e-08 4.59e-08 6.22e-08 3.28e-07 1.43e-07 3.79e-07   erg/cm2
Peak flux Cutoff-PL 3.90e-01 2.74e-01 1.33e-01 1.05e-01 8.40e-01 9.04e-01   ph/cm2/s
              Error 1.88e-01 1.38e-01 1.08e-01 8.58e-02 4.14e-01 4.52e-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    2.072    0.198    -      -           2.29e-03 2.94e-04   63.840 57
CPL   1.580    0.700      38.6   -9.2      4.26e-03 5.49e-03   62.650 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.847    0.494    -      -           7.11e-03 2.09e-03   37.410 57
CPL   2.759    1.054     247.7    0.0      2.57e-03 0.00e+00   36.840 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: 13.568000 sec.
T50 in the 50-300 keV band: 8.448000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   52.668   -6.368   46.300
T90    41.932   -3.928   38.004
T50    23.116    3.356   26.472
Peak    1.000    0.184    1.184

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
   33.5367   -22.0515   0.0126    42.6071    -5.2734         1.8097747     15.220 TRIG_01230423                 
 
Foreground time interval of the image:
 -6.368  36.693 (delta_t =  43.061 [sec])
Background time interval of the image:
-239.408  -6.368 (delta_t = 233.040 [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   -6.368 sec. to   46.300 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.07199     ( -0.19118   0.203974 )
Norm@50keV  : 2.29059E-03    ( -0.000297467   0.000289584 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.84     using 59 bins.
 Reduced chi-squared = 1.12
# Null hypothesis probability of 2.49e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 52.67 sec: 0.355495 ( -0.036831  0.036872 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.11829e-06 ( -1.31775e-07  1.33592e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -6.368 sec. to   46.300 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.58030     ( -0.896187   0.504552 )
Epeak [keV] : 38.5577      ( -20.1288 -38.5571 )
Norm@50keV  : 4.25578E-03    ( -0.00227765   0.00869283 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.65     using 59 bins.
 Reduced chi-squared = 1.11875
# Null hypothesis probability of 2.52e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 52.67 sec: 0.348216 ( -0.038673  0.038554 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08077e-06 ( -1.40804e-07  1.44925e-07 ) ergs/cm2

Band function

Time interval is from   -6.368 sec. to   46.300 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]    : 11.0538  (-1.28699  1.41872)
R^2/D10^2   : 0.110919  (-0.041065   0.0668454)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   83.36     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.30e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.493e-07   2.736e-08
25- 50  4.248e-07   5.615e-08
50-150  2.943e-07   8.069e-08
15-150  8.684e-07   1.085e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 65.1266       (-16.9309      26.331)
Norm        : 1.78255       (-0.285861     0.333941)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   63.01     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.72e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.388e-07   3.368e-08
25- 50  3.724e-07   4.495e-08
50-150  4.527e-07   1.321e-07
15-150  1.064e-06   1.604e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 3.11813        (-0.882492      1.26373)
R1^2/D10^2  : 14.3637        (-11.8609      99.8276)
kT2 [keV]   : 14.0992        (-2.03592      2.73775)
R2^2/D10^2  : 3.81135E-02    (-0.019862   0.0335037)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   58.41     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.51e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.633e-07   1.105e-07
25- 50  3.453e-07   8.551e-08
50-150  4.145e-07   1.225e-07
15-150  1.023e-06   2.436e-07

Peak spectrum fit

Power-law model

Time interval is from    0.184 sec. to    1.184 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84743     ( -0.462978   0.525137 )
Norm@50keV  : 7.10883E-03    ( -0.00217072   0.00200764 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   37.41     using 59 bins.
 Reduced chi-squared = 0.656316
# Null hypothesis probability of 9.79e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.998237 ( -0.259189  0.259333 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.53762e-08 ( -1.90091e-08  1.91906e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.184 sec. to    1.184 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.75864     ( -1.85107   0.257004 )
Epeak [keV] : 247.690      (   )
Norm@50keV  : 2.56696E-03    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   36.84     using 59 bins.
 Reduced chi-squared = 0.657857
# Null hypothesis probability of 9.78e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 0.840004 ( -0.419309  0.407806 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.68683e-08 ( -2.8179e-08  2.10662e-08 ) ergs/cm2

Band function

Time interval is from    0.184 sec. to    1.184 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]    : 9.82183  (-3.79495  11.7056)
R^2/D10^2   : 0.468959  (-0.448651   2.55498)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   47.37     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 8.15e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.155e-09   5.673e-09
25- 50  2.219e-08   1.226e-08
50-150  1.099e-08   7.785e-09
15-150  4.233e-08   2.531e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 119.804       (-73.6728      -119.163)
Norm        : 4.16015       (-1.24877     2.10633)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   38.51     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.71e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.084e-08   6.515e-09
25- 50  1.938e-08   1.126e-08
50-150  3.456e-08   2.327e-08
15-150  6.478e-08   4.090e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.26875        (-2.42934      3.05835)
R1^2/D10^2  : 4.29778        (-3.62048      79.4134)
kT2 [keV]   : 28.4881        (-11.4809      57.4788)
R2^2/D10^2  : 8.29335E-03    (-0.00787328   0.0275786)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   36.37     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.75e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.391e-08   7.675e-09
25- 50  1.607e-08   8.975e-09
50-150  3.878e-08   2.461e-08
15-150  6.876e-08   3.525e-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: 2.01862     ( -0.178679   0.18933 )
Norm@50keV  : 2.62246E-03    ( -0.000322048   0.000315348 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   62.33     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.93e-01 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 43.06 sec: 0.396775 ( -0.0404707  0.0405149 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04247e-06 ( -1.19606e-07  1.21159e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.918060     ( -0.995425   0.826442 )
Epeak [keV] : 44.4521      ( -12.7913 13.0224 )
Norm@50keV  : 1.04037E-02    ( -0.00662936   0.0252237 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   56.92     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 4.41e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 43.06 sec: 0.379904 ( -0.04239  0.042365 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.73905e-07 ( -1.23048e-07  1.28676e-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)  = 3.43e-07
S(50-100 keV) = 3.27e-07

T90 vs. Hardness ratio plot

T90                                   = 41.9319999217987 sec.
Hardness ratio (energy fluence ratio) = 0.953353

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.982136
Count Ratio (50-100 keV) / (15-25 keV) = 0.574128

Mask shadow pattern

IMX = 9.158820703909174E-01, IMY = 8.453446961476060E-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:
-239.408000 -6.368000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.0528  38.3766    4.2  46.2  156.5  -2.8386  -2.7    6.5	Cyg X-2                       
 23.3337  46.5308    2.3  33.8 -138.1   1.9228   5.1 ------	UNKNOWN                       
 52.8454   1.5870    2.1  43.3  -50.3   3.8556   5.4 ------	UNKNOWN

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

Time interval of the image:
-6.368000 36.692600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.0549  38.2558    7.9  46.2  156.3   0.3085   1.5    6.8	Cyg X-2                       
326.9220  28.3310    2.3  43.0  142.9   1.0183   5.1 ------	UNKNOWN                       
  4.6341  15.6406    2.1   6.2  129.5   0.3860   5.5 ------	UNKNOWN                       
 33.5367 -22.0515    0.8  42.6   -5.3   1.8105  15.2 ------	UNKNOWN                       
355.5328  48.9598    3.6  36.9 -170.4   0.2911   3.2 ------	UNKNOWN                       
 28.2578  19.3063    2.4  17.3  -82.6   0.4002   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
130.492640 962.728000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 99.1114 -34.3732    2.8  58.1   -5.9  14.8658   4.2 ------	UNKNOWN

Plot creation:
Sat Oct 19 18:25:48 EDT 2024