batgrbproduct analysis for trigger=1216751

batgrbproduct Analysis for Trigger=1216751

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Thu Feb 22 19:17:14 EST 2024
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1216751/GCN5_download_cron
======================================================================

  Trigger: 01216751      Segment: 000

  BAT Trigger Time: 730249552   [s; MET]
      Trigger Stop: 730249616   [s; MET]
               UTC: 2024-02-21T23:05:19.043100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 84.6518450228076   Dec: 22.1740318995959  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    16.98
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    16.98

  Flight Position:   [ source = BAT ]
    RA: 84.6518450228076   Dec: 22.1740318995959  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 84.6230455200991   Dec: 22.1814361300251  [deg; J2000]  
        { 05h 38m 29.5s , +22d 10' 53.2" }
         +/- 1.55458749641562 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.793020881906254 [arcmin] (formal 1-sigma fit error)
    SNR: 16.195054817234
 
  Angular difference between Flight and Ground position is 1.660656 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 1.7039999961853 +/- 0.00800001621246338
        Measured from: 213.40800011158
                   to: 215.112000107765     [s; relative to TRIGTIME]
     T50: 0.0799999237060547 +/- 0.776000022888184
        Measured from: 215.008000135422
                   to: 215.088000059128     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 212.945999979973     
                   to: 213.945999979973     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 213.399999976158     
                   to: 215.116000056267     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    -0.004466   0.000649  -0.004078   0.000810
           0.002505   0.002578   0.002302   0.001883 [error]
 Peak      0.010062   0.013969   0.003823   0.005225
           0.004404   0.004413   0.003887   0.003345 [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 1.53e-07 1.87e-07 1.67e-07 2.56e-07 5.96e-07 7.63e-07   erg/cm2
              Error 2.07e-08 1.84e-08 3.10e-08 9.35e-08 6.97e-08 1.29e-07   erg/cm2
Peak flux Power-law 1.79e-01 1.22e-01 5.42e-02 3.34e-02 3.71e-01 3.88e-01   ph/cm2/s
              Error 2.48e-02 1.18e-02 9.71e-03 1.14e-02 3.57e-02 3.73e-02   ph/cm2/s
 
Fluence   Cutoff-PL 1.50e-07 1.92e-07 1.64e-07 1.69e-07 5.82e-07 6.76e-07   erg/cm2
              Error 2.25e-08 2.34e-08 3.40e-08 1.77e-07 8.13e-08 1.86e-07   erg/cm2
Peak flux Cutoff-PL 1.76e-01 1.25e-01 5.37e-02 2.40e-02 3.68e-01 3.78e-01   ph/cm2/s
              Error 2.40e-02 1.48e-02 1.03e-02 2.25e-02 3.75e-02 4.43e-02   ph/cm2/s
 
Fluence        Band 1.52e-07 1.89e-07 1.63e-07 2.42e-07 5.91e-07 7.48e-07   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 1.76e-01 1.24e-01 5.36e-02 2.44e-02 3.68e-01 3.79e-01   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    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
The chi2 of BB fit is 61.61 which shows a significant improvement in the fit over a PL.
Check the BB fit.
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.000    0.000    -      -           0.00e+00 0.00e+00    0.000  0
CPL   0.000    0.000       0.0    0.0      0.00e+00 0.00e+00    0.000  0
 
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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    1.716  213.400  215.116
T90     1.704  213.408  215.112
T50     0.080  215.008  215.088
Peak    1.000  212.946  213.946
  • Click here for the BAT GCN circular template
  • Estimated redshift from machine learning (Ukwatta et al. 2016) - may take a few minutes to calcaulte

    Image

    Pre-slew 15-350 keV image (Event data; bkg subtracted)

    #   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
       84.6230 +22.1814 0.0119   23.3   40.0       1.3120    16.2  TRIG_01216751       
    ------------------------------------------
     
    Foreground time interval of the image:
      5.000  17.344 (delta_t =  12.344 [sec])
     20.000  20.180 (delta_t =   0.180 [sec])
     21.000  36.220 (delta_t =  15.220 [sec])
     37.000  37.170 (delta_t =   0.170 [sec])
    Background time interval of the image:
    

    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
    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 64.000000
    

    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 64.000000
    

    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 64.000000
    

    SN=5 or 10 sec. binning (whichever binning is satisfied first)

    SN=5 or 10 sec. binning (T < 200 sec)

    Spectra

    Notes:

    Time averaged spectrum fit using the pre-slew DRM

    Power-law model
    Multiple GTIs in the spectrum
    tstart tstop
    213.400000 213.490000
    215.000000 215.116000
    Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    script folder: /local/data/BATtools/battools/bin/GRB_spec_fit_v2
    folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
    
    Cutoff power-law model
    Multiple GTIs in the spectrum
    tstart tstop
    213.400000 213.490000
    215.000000 215.116000
    Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
    folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
    
    Band function
    Multiple GTIs in the spectrum
    tstart tstop
    213.400000 213.490000
    215.000000 215.116000
    Usage: bat_spec_fit_band_sys.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
    folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
    
    Single BB
    Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)           
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    
    Thermal bremsstrahlung (OTTB)
    Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)           
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    
    Double BB
    Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)           
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    

    Peak spectrum fit

    Power-law model
    Time interval is from  212.946 sec. to  213.490 sec.
    Usage: bat_spec_fit_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    script folder: /local/data/BATtools/battools/bin/GRB_spec_fit_v2
    folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
    
    Cutoff power-law model
    Time interval is from  212.946 sec. to  213.490 sec.
    Usage: bat_spec_fit_cutoff_sys_xspec12.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
    folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
    
    Band function
    Time interval is from  212.946 sec. to  213.490 sec.
    Usage: bat_spec_fit_band_sys.sh (pha file) (response file) (script folder) (folder of taka's xspec lmodel)
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    script folder: /local/data/bat2/BATtools/battools/bin/GRB_spec_fit_v2
    folder of taka's xspec lmodel: /local/data/bat1/prebascript/xspec_taka_lmodel
    
    Single BB
    Usage: bat_spec_fit_bb_sys.sh (pha file) (response file)           
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    
    Thermal bremsstrahlung (OTTB)
    Usage: bat_spec_fit_brems_sys.sh (pha file) (response file)           
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    
    Double BB
    Usage: bat_spec_fit_2bb_sys.sh (pha file) (response file)           
           This script tries to add the systematic column to the PHA
           file before doing the fitting                            
    

    Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

    Power-law model
    
    
    Cutoff power-law model
    
    
    Band function
    
    
    
    

    S(25-50 keV) vs. S(50-100 keV) plot

    S(25-50 keV)  = 1.87e-07
    S(50-100 keV) = 1.67e-07
    

    T90 vs. Hardness ratio plot

    T90                                   = 1.7039999961853 sec.
    Hardness ratio (energy fluence ratio) = 0.893048
    

    Color vs. Color plot

    Count Ratio  (25-50 keV) / (15-25 keV) = -0.14532
    Count Ratio (50-100 keV) / (15-25 keV) = 0.913121
    

    Mask shadow pattern

    IMX = 3.290915554362888E-01, IMY = -2.764326540687411E-01
    

    TIME vs. PHA plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 64.000000
    

    TIME vs. DetID plot around the trigger time

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 64.000000
    

    100 us light curve (15-350 keV)

    Blue+Cyan dotted lines: Time interval of the scaled map
    From 0.000000 to 64.000000
    

    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:
    -13.799400 3.950000
    5.000000 17.343500
    18.000000 37.680000
    39.000000 73.400600
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.7467  22.0313    6.1  22.8   38.3  -0.3506  -1.9    6.4	Crab                          
     73.3126  54.7905    2.6  54.2   16.9   2.9969   4.4 ------	UNKNOWN                       
     84.6350  22.1730    0.6  23.3   40.1   3.6547  19.5 ------	UNKNOWN                       
     31.6005   7.6277    2.6  44.4  -61.2   3.1840   4.4 ------	UNKNOWN                       
    

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

    Time interval of the image:
    5.000000 17.343500
    20.000000 20.180000
    21.000000 36.220000
    37.000000 37.170000
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6225  22.1624    8.2  22.9   37.9  -0.1165  -1.4    8.9	Crab                          
     84.6231  22.1814    0.7  23.3   40.0   1.3126  16.2 ------	UNKNOWN                       
     94.4325 -11.6780    2.6  22.4  142.5   0.3443   4.5 ------	UNKNOWN                       
     51.8169   9.2779    2.3  25.2  -50.7   0.4337   4.9 ------	UNKNOWN                       
     60.9480 -30.2842    2.2  33.9 -138.4   0.5292   5.3 ------	UNKNOWN                       
    

    Post-slew image of 15-350 keV band

    Time interval of the image:
    137.200590 213.490000
    215.000000 303.092700
     
    # RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
    #  [deg]    [deg]    ['] [deg]  [deg]                   [']
     83.6440  22.1652    6.7   0.9  -88.3  -0.4299  -1.7    9.1	Crab                          
     84.7082  22.1749    0.4   0.0  107.1   6.3928  26.2 ------	UNKNOWN                       
     65.5653  13.1206    2.8  20.3 -110.5   1.1779   4.1 ------	UNKNOWN                       
     37.1052  30.6977    2.0  43.1  -65.4   5.9147   5.7 ------	UNKNOWN                       
    
    Plot creation:
    Thu Feb 22 19:18:19 EST 2024