batgrbproduct analysis for trigger=1215912

batgrbproduct Analysis for Trigger=1215912

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Sat Mar  9 13:56:06 EST 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1215912
======================================================================

  Trigger: 01215912      Segment: 000

  BAT Trigger Time: 729914433.6   [s; MET]
      Trigger Stop: 729914434.624   [s; MET]
               UTC: 2024-02-18T02:00:00.666060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 161.780800958629   Dec: 1.30403195307657  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.54
     Image Trigger?:     NO
     Rate S/N Ratio:     11.3578166916005  [ if not an image trigger ]
     Image S/N Ratio:    6.54

  Flight Position:   [ source = BAT ]
    RA: 161.780800958629   Dec: 1.30403195307657  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 161.805780547244   Dec: 1.28978262037998  [deg; J2000]  
        { 10h 47m 13.4s , +01d 17' 23.2" }
         +/- 1.18607054720025 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.403427351333368 [arcmin] (formal 1-sigma fit error)
    SNR: 23.8367041565111
 
  Angular difference between Flight and Ground position is 1.725147 arcmin
 
  Partial Coding Fraction: 0.3671875    [ including projection effects ]

  Duration
     T90: 258.031999945641 +/- 26.735401600844
        Measured from: -9.1360000371933
                   to: 248.895999908447     [s; relative to TRIGTIME]
     T50: 46.663999915123 +/- 20.1574869038965
        Measured from: 5.15199995040894
                   to: 51.8159998655319     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 21.6200000047684     
                   to: 22.6200000047684     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -19.2239999771118     
                   to: 315.299999952316     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.980683   3.712684   2.676311   0.753564
           0.133237   0.139926   0.120496   0.101388 [error]
 Peak      0.070137   0.134645   0.119807   0.026716
           0.012242   0.013704   0.012834   0.009127 [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 9.47e-07 1.62e-06 2.11e-06 5.55e-06 6.19e-06 1.02e-05   erg/cm2
              Error 7.40e-08 7.46e-08 1.22e-07 7.06e-07 2.91e-07 7.91e-07   erg/cm2
Peak flux Power-law 9.10e-01 9.69e-01 7.32e-01 8.99e-01 2.95e+00 3.51e+00   ph/cm2/s
              Error 1.73e-01 1.18e-01 9.99e-02 2.44e-01 3.38e-01 4.04e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.10e-07 1.65e-06 2.13e-06 4.05e-06 6.09e-06 8.73e-06   erg/cm2
              Error 9.12e-08 8.78e-08 1.31e-07 1.56e-06 3.30e-07 1.65e-06   erg/cm2
Peak flux Cutoff-PL 7.31e-01 1.06e+00 8.13e-01 3.48e-01 2.85e+00 2.95e+00   ph/cm2/s
              Error 2.11e-01 1.44e-01 1.24e-01 2.59e-01 3.48e-01 4.29e-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    1.619    0.080    -      -           1.98e-03 8.76e-05   60.420 57
CPL   1.408    0.295     142.1  -41.8      2.52e-03 8.83e-04   59.150 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.405    0.181    -      -           2.42e-02 2.75e-03   67.270 57
CPL   0.305    0.902      80.2   48.0      8.36e-02 1.06e-01   61.690 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: 237.120000 sec.
T50 in the 50-300 keV band: 25.792000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  334.524  -19.224  315.300
T90   258.032   -9.136  248.896
T50    46.664    5.152   51.816
Peak    1.000   21.620   22.620
  • 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
      161.8058     1.2898   0.0081    35.0877   131.0785         3.5812795     23.837 TRIG_01215912                 
     
    Foreground time interval of the image:
    -19.224  10.501 (delta_t =  29.725 [sec])
    Background time interval of the image:
    -239.600 -19.224 (delta_t = 220.376 [sec])
    

    Lightcurves

    Notes:

    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:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from  -19.224 sec. to  315.300 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.61914     ( -0.0798526   0.0803192 )
    Norm@50keV  : 1.98215E-03    ( -8.77709e-05   8.74555e-05 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   60.42     using 59 bins.
     Reduced chi-squared = 1.06
    # Null hypothesis probability of 3.53e-01 with 57 degrees of freedom
     
    Photon flux (15-150 keV)    in 334.5 sec: 0.256257 ( -0.011703  0.011731 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 6.18765e-06 ( -2.90444e-07  2.91623e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from  -19.224 sec. to  315.300 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.40789     ( -0.340438   0.248745 )
    Epeak [keV] : 142.140      ( -58.5391 -142.147 )
    Norm@50keV  : 2.52244E-03    ( -0.000599555   0.00116696 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   59.15     using 59 bins.
     Reduced chi-squared = 1.05625
    # Null hypothesis probability of 3.61e-01 with 56 degrees of freedom
     
    Photon flux (15-150 keV)    in 334.5 sec: 0.252950 ( -0.012668  0.012687 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 6.08492e-06 ( -3.30707e-07  3.2874e-07 ) ergs/cm2
     
    
    Band function
    Time interval is from  -19.224 sec. to  315.300 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]    : 14.2906  (  )
    R^2/D10^2   : 3.27681E-02  (   )
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                  169.84     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 3.76e-13 with 57 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  4.718e-07   3.847e-08
    25- 50  1.791e-06   1.050e-07
    50-150  2.433e-06   2.201e-07
    15-150  4.695e-06   2.275e-07
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 175.070       (-36.2109      -174.35)
    Norm        : 1.03755       (-0.050904     0.0561803)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   59.55     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 3.83e-01 with 57 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  8.780e-07   5.586e-08
    25- 50  1.662e-06   1.612e-07
    50-150  3.484e-06   1.054e-06
    15-150  6.024e-06   1.259e-06
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 7.94631        (-1.46013      1.46057)
    R1^2/D10^2  : 0.181991        (-0.0718483      0.166194)
    kT2 [keV]   : 28.7507        (-5.99155      11.7629)
    R2^2/D10^2  : 2.00634E-03    (-0.00134222   0.00279924)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   68.32     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 1.07e-01 with 55 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  7.807e-07   1.044e-07
    25- 50  1.736e-06   2.106e-07
    50-150  3.507e-06   8.886e-07
    15-150  6.023e-06   1.007e-06
    

    Peak spectrum fit

    Power-law model
    Time interval is from   21.620 sec. to   22.620 sec.
     
    Spectral model in power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 1.40468     ( -0.179708   0.182125 )
    Norm@50keV  : 2.42206E-02    ( -0.00275519   0.00274811 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   67.27     using 59 bins.
     Reduced chi-squared = 1.18018
    # Null hypothesis probability of 1.66e-01 with 57 degrees of freedom
     
    Photon flux (15-150 keV)    in 1 sec: 2.95282 ( -0.33728  0.33776 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.33841e-07 ( -2.90598e-08  2.92767e-08 ) ergs/cm2
     
    
    Cutoff power-law model
    Time interval is from   21.620 sec. to   22.620 sec.
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.304777     ( -0.990356   0.814139 )
    Epeak [keV] : 80.1835      ( -17.7422 78.3497 )
    Norm@50keV  : 8.36385E-02    ( -0.0495064   0.162849 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   61.69     using 59 bins.
     Reduced chi-squared = 1.10161
    # Null hypothesis probability of 2.80e-01 with 56 degrees of freedom
     
    Photon flux (15-150 keV)    in 1 sec: 2.84601 ( -0.34825  0.34772 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.21335e-07 ( -3.10432e-08  3.12456e-08 ) ergs/cm2
     
    
    Band function
    Time interval is from   21.620 sec. to   22.620 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]    : 16.2985  (-1.98171  2.27618)
    R^2/D10^2   : 0.269926  (-0.0981829   0.151455)
    (R is the radius in km and D10 is the distance to the source in units of 10 kpc)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   68.95     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 1.33e-01 with 57 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  1.476e-08   3.160e-09
    25- 50  6.310e-08   9.670e-09
    50-150  1.180e-07   2.442e-08
    15-150  1.958e-07   3.125e-08
    
    Thermal bremsstrahlung (OTTB)
     
     
    Spectral model: thermal bremsstrahlung
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT [keV]    : 200.000       (-53.1052      -200)
    Norm        : 12.2607       (-1.37188     1.37188)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   66.57     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 1.81e-01 with 57 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  3.054e-08   1.691e-08
    25- 50  5.874e-08   3.228e-08
    50-150  1.288e-07   7.085e-08
    15-150  2.181e-07   1.193e-07
    
    Double BB
     
     
    Spectral model: bbodyrad<1> + bbodyrad<2>
    ------------------------------------------------------------
    Parameters  : value         Lower 90%    Upper 90%
    kT1 [keV]   : 6.35998        (-3.59377      5.75413)
    R1^2/D10^2  : 2.63435        (-2.1422      88.9766)
    kT2 [keV]   : 20.5880        (-3.98556      15.4154)
    R2^2/D10^2  : 0.103207    (-0.0937875   0.0858512)
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   61.39     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 2.58e-01 with 55 degrees of freedom
     
    Energy  Fluence     90% Error
    [keV]   [erg/cm2]   [erg/cm2]
    15- 25  2.366e-08   1.330e-08
    25- 50  5.961e-08   2.988e-08
    50-150  1.354e-07   7.600e-08
    15-150  2.187e-07   9.844e-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: 1.42135     ( -0.0989762   0.0990283 )
    Norm@50keV  : 8.06266E-03    ( -0.000458105   0.000457775 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   53.31     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 6.14e-01 with 57 degrees of freedom
     
    Photon flux (15-150 keV)    in 29.72 sec: 0.986746 ( -0.0586469  0.0587678 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.30552e-06 ( -1.41655e-07  1.4214e-07 ) ergs/cm2
     
    
    Cutoff power-law model
    Spectral model in the cutoff power-law:
    ------------------------------------------------------------
    Parameters  : value       lower 90%   higher 90%
    Photon index: 0.978407     ( -0.43929   0.399968 )
    Epeak [keV] : 122.986      ( -36.8764 493.448 )
    Norm@50keV  : 1.31196E-02    ( -0.00457174   0.00785813 )
    ------------------------------------------------------------
    #Fit statistic  : Chi-Squared                   49.71     using 59 bins.
     Reduced chi-squared = 
    # Null hypothesis probability of 7.10e-01 with 56 degrees of freedom
     
    Photon flux (15-150 keV)    in 29.72 sec: 0.965231 ( -0.061608  0.061729 ) ph/cm2/s
    Energy fluence (15-150 keV)             : 2.24725e-06 ( -1.53578e-07  1.52764e-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)  = 1.62e-06
    S(50-100 keV) = 2.11e-06
    

    T90 vs. Hardness ratio plot

    T90                                   = 258.031999945641 sec.
    Hardness ratio (energy fluence ratio) = 1.30247
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = 1.24558
    Count Ratio (50-100 keV) / (15-25 keV) = 0.897885
    

    Mask shadow pattern

    IMX = -4.616012525820294E-01, IMY = -5.295442998562524E-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:
    -239.600000 -19.224000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.5729 -40.5623    2.0  27.8 -126.6   2.4990   5.7    2.1	Vela X-1                      
    162.3501  -4.2314    2.6  33.6  140.5   2.1437   4.5 ------	UNKNOWN                       
    120.5214  12.0312    2.3  26.9   43.2   2.0782   5.1 ------	UNKNOWN                       
     72.9554 -11.9610    2.1  55.2  -32.3   9.5929   5.4 ------	UNKNOWN                       
    

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

    Time interval of the image:
    -19.224000 10.500600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.6052 -40.4985    2.3  27.7 -126.7  -0.4436  -4.9    4.9	Vela X-1                      
    161.8058   1.2898    0.5  35.1  131.1   3.5811  23.8 ------	UNKNOWN                       
    185.1200 -40.2664    2.4  55.3 -166.7   1.2905   4.8 ------	UNKNOWN                       
     83.6861 -25.7293    3.0  44.8  -50.1   0.8645   3.8 ------	UNKNOWN                       
     87.5457 -34.8657    3.5  43.6  -64.0   1.0093   3.3 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    135.700600 962.531000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
    135.4644 -40.5653    2.2  48.2  -18.2  11.4727   5.1    3.0	Vela X-1                      
    114.1203  -7.3832    2.7  48.3   34.0  13.7710   4.3 ------	UNKNOWN                       
    134.8704   0.2953    2.4  26.9   43.2   7.3599   4.7 ------	UNKNOWN                       
    171.3141  11.7770    2.6  14.2  176.7   4.9383   4.4 ------	UNKNOWN                       
    134.8755 -27.5431    3.2  38.7   -5.1   6.0225   3.6 ------	UNKNOWN                       
    213.8744  30.3303    2.3  57.3 -170.9  23.8232   5.0 ------	UNKNOWN                       
    174.3628 -42.9453    2.7  45.6  -57.9  23.9098   4.3 ------	UNKNOWN                       
    
    Plot creation:
    Sat Mar  9 15:14:02 EST 2024