batgrbproduct analysis for trigger=1107209

batgrbproduct Analysis for Trigger=1107209

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Thu May 19 22:16:20 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1107209/GCN5_download_cron
======================================================================

  Trigger: 01107209      Segment: 000

  BAT Trigger Time: 674683840   [s; MET]
      Trigger Stop: 674683904   [s; MET]
               UTC: 2022-05-19T20:10:10.832320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 245.074478384337   Dec: -15.4503592629384  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.8
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    12.8

  Flight Position:   [ source = BAT ]
    RA: 245.074478384337   Dec: -15.4503592629384  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 245.043905833092   Dec: -15.5056937348065  [deg; J2000]  
        { 16h 20m 10.5s , -15d 30' 20.5" }
         +/- 1.53459613539879 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.706058434300626 [arcmin] (formal 1-sigma fit error)
    SNR: 16.4972867262381
 
  Angular difference between Flight and Ground position is 3.761391 arcmin
 
  Partial Coding Fraction: 0.7265625    [ including projection effects ]

  Duration
     T90: 287.131999969482 +/- 23.1910403291063
        Measured from: -97.5399998426437
                   to: 189.592000126839     [s; relative to TRIGTIME]
     T50: 164.22000002861 +/- 20.785657640866
        Measured from: -18.135999917984
                   to: 146.084000110626     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -18.0360000133514     
                   to: -17.0360000133514     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -116.983999967575     
                   to: 221.740000009537     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    11.888924   1.031851   0.058788   0.023252
           0.159101   0.140150   0.119801   0.109643 [error]
 Peak      0.049268   0.032367  -0.001092   0.008866
           0.009110   0.008115   0.006954   0.006411 [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 3.83e-06 5.13e-07 3.03e-08 1.90e-09 4.38e-06 4.38e-06   erg/cm2
              Error 3.32e-07 6.76e-08 1.02e-08 1.10e-09 3.29e-07 3.29e-07   erg/cm2
Peak flux Power-law 5.16e-01 1.69e-01 3.11e-02 6.67e-03 7.21e-01 7.23e-01   ph/cm2/s
              Error 1.48e-01 8.43e-02 3.79e-02 1.56e-02 1.99e-01 2.01e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.72e-06 3.75e-07 4.30e-10 1.93e-16 4.10e-06 4.10e-06   erg/cm2
              Error 3.77e-07 8.01e-08 1.59e-09 2.00e-13 3.82e-07 3.82e-07   erg/cm2
Peak flux Cutoff-PL 5.18e-01 1.64e-01 2.86e-02 5.93e-03 7.17e-01 7.20e-01   ph/cm2/s
              Error 1.48e-01 -------- -------- -------- -------- 2.02e-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    6.079    0.306    -      -           9.69e-05 2.65e-05   68.640 57
CPL   1.000    0.000      50.0    0.0      1.64e-03 0.00e+00  517.130 56
 
The chi2 of BB fit is 54.42 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    3.445    1.035    -      -           1.86e-03 1.59e-03   70.000 57
CPL   1.858    0.000       2.5    0.0      2.58e-02 0.00e+00   71.070 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  338.724 -116.984  221.740
T90   287.132  -97.540  189.592
T50   164.220  -18.136  146.084
Peak    1.000  -18.036  -17.036

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  245.0439 -15.5057 0.0117   17.4   99.1       3.2721    16.5  TRIG_01107209       
------------------------------------------
 
Foreground time interval of the image:
-17.699  55.901 (delta_t =  73.600 [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

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)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Time interval is from -116.984 sec. to  221.740 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.07915     ( -0.304726   0.308187 )
Norm@50keV  : 9.69473E-05    ( -2.36513e-05   2.94006e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.64 using 59 PHA bins.
# Reduced chi-squared =          1.204 for     57 degrees of freedom 
# Null hypothesis probability =   1.389433e-01
 
Photon flux (15-150 keV)    in 338.7 sec: 0.432021 ( -0.0353586  0.0356764 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.37783e-06 ( -3.27975e-07  3.3019e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -116.984 sec. to  221.740 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.64367E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         517.13 using 59 PHA bins.
# Reduced chi-squared =         9.2344 for     56 degrees of freedom 
# Null hypothesis probability =   7.200417e-76
 
Photon flux (15-150 keV)    in 338.7 sec: 0.405954 ( -0.042139  0.041042 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.096e-06 ( -3.87236e-07  3.77312e-07 ) ergs/cm2
 
Band function
Time interval is from -116.984 sec. to  221.740 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -8.46404   ( 5.9685   8.46404 )
beta        : -6.10824    ( -0.287528   0.327524 )
Epeak [keV] : 371.996      ( -371.996 -371.996 )
Norm@50keV   : 1.28260E-02    ( -0.00302653   0.00419695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.66 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     55 degrees of freedom 
# Null hypothesis probability =   1.019143e-01
 
Photon flux (15-150 keV)    in 338.7 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]    : 2.68877  (-0.148722  0.163159)
R^2/D10^2   : 118.733  (-44.7889   71.0646)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.42 using 59 PHA bins.
# Reduced chi-squared =         0.9547 for     57 degrees of freedom 
# Null hypothesis probability =   5.725608e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.684e-06   5.011e-07
25- 50  3.602e-07   5.876e-08
50-150  2.263e-10   1.227e-10
15-150  4.044e-06   5.394e-07
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 4.67053       (-0.373348      0.428646)
Norm        : 124.158       (-40.0607     59.0832)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.791e-06   4.747e-07
25- 50  4.090e-07   6.483e-08
50-150  1.486e-09   8.176e-10
15-150  4.202e-06   5.651e-07
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 0.870230        (-0.150671      0.16227)
R1^2/D10^2  : 1.77386E+06        (-1.6176e+06      -1.61768e+06)
kT2 [keV]   : 2.74945        (-0.184931      18.8182)
R2^2/D10^2  : 97.7732    (-97.4905   77.3203)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.683e-06   6.063e-07
25- 50  3.619e-07   5.866e-08
50-150  5.125e-08   1.229e-10
15-150  4.096e-06   4.854e-07

Peak spectrum fit

Power-law model
Time interval is from  -18.036 sec. to  -17.036 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.44528     ( -0.829643   1.2413 )
Norm@50keV  : 1.86264E-03    ( -0.00133914   0.0018443 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.00 using 59 PHA bins.
# Reduced chi-squared =          1.228 for     57 degrees of freedom 
# Null hypothesis probability =   1.157058e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.720766 ( -0.198962  0.199297 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.83545e-08 ( -1.00599e-08  1.18255e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -18.036 sec. to  -17.036 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.85753     (     )
Epeak [keV] : 2.49138      (   )
Norm@50keV  : 2.58262E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.07 using 59 PHA bins.
# Reduced chi-squared =          1.269 for     56 degrees of freedom 
# Null hypothesis probability =   8.455187e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.716605 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.79371e-08 ( -9.7385e-09  1.22527e-08 ) ergs/cm2
 
Band function
Time interval is from  -18.036 sec. to  -17.036 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -2.07192   ( 2.07194   2.07194 )
beta        : -3.44491    ( -1.24216   0.828768 )
Epeak [keV] : 0.367637      ( -0.367637 -0.367637 )
Norm@50keV   : 1.02378    ( 13.1599   -1.02385 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.00 using 59 PHA bins.
# Reduced chi-squared =          1.273 for     55 degrees of freedom 
# Null hypothesis probability =   8.385560e-02
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Single BB
 XSPEC: quit
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 3.81839  (-1.25243  2.15515)
R^2/D10^2   : 22.3135  (-22.5313   208.888)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.613e-08   9.505e-09
25- 50  5.090e-09   3.259e-09
50-150  4.642e-11   5.100e-11
15-150  2.127e-08   1.272e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 12.7644       (-6.78709      15.18)
Norm        : 15.5992       (-9.7708     60.7444)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.533e-08   8.720e-09
25- 50  8.888e-09   5.534e-09
50-150  1.118e-09   1.034e-09
15-150  2.533e-08   1.540e-08
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.45314        (-1.29939      1.5697)
R1^2/D10^2  : 230.228        (-247.227      257040)
kT2 [keV]   : 9.60592        (-4.24435      12.6181)
R2^2/D10^2  : 0.208604    (-0.215326   1.3113)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.486e-08   7.715e-09
25- 50  9.809e-09   6.215e-09
50-150  4.205e-09   3.044e-09
15-150  2.887e-08   1.461e-08
Plot creation:
Thu May 19 22:20:06 EDT 2022