batgrbproduct analysis for trigger=1125350

batgrbproduct Analysis for Trigger=1125350

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Tue Sep 27 07:24:26 EDT 2022
             Host Name: batproc1
   Current Working Dir: /local/data/bat1/prebascript/trigger1125350/GCN5_download_cron
======================================================================

  Trigger: 01125350      Segment: 000

  BAT Trigger Time: 685872664   [s; MET]
      Trigger Stop: 685872728   [s; MET]
               UTC: 2022-09-26T08:10:34.072960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 244.925075128708   Dec: -15.8371320617403  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    13.83
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    13.83

  Flight Position:   [ source = BAT ]
    RA: 244.925075128708   Dec: -15.8371320617403  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 244.981441339023   Dec: -15.81140277812  [deg; J2000]  
        { 16h 19m 55.5s , -15d 48' 41.1" }
         +/- nan [arcmin] (estimated 90% radius based on SNR)
         +/- 4.38678887484741 [arcmin] (formal 1-sigma fit error)
    SNR: -2.8217700523529
 
  Angular difference between Flight and Ground position is 3.601448 arcmin
 
  Partial Coding Fraction: 0.7265625    [ including projection effects ]

  Duration
     T90: 527.619999885559 +/- 62.4594673523249
        Measured from: 81.200000166893
                   to: 608.820000052452     [s; relative to TRIGTIME]
     T50: 254.947999954224 +/- 27.479059725424
        Measured from: 245.048000097275
                   to: 499.996000051498     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 410.728000044823     
                   to: 411.728000044823     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -183.251999974251     
                   to: 633.56400001049     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    34.230733   2.403790  -0.193209   0.117144
           0.266495   0.231850   0.191202   0.161505 [error]
 Peak      0.064191   0.023272   0.015647   0.002464
           0.008431   0.007087   0.006396   0.005378 [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 1.20e-05 1.17e-06 4.60e-08 1.88e-09 1.32e-05 1.32e-05   erg/cm2
              Error 9.52e-07 1.17e-07 1.23e-08 8.65e-10 9.38e-07 9.38e-07   erg/cm2
Peak flux Power-law 6.53e-01 2.10e-01 3.75e-02 7.81e-03 9.05e-01 9.08e-01   ph/cm2/s
              Error 1.65e-01 8.80e-02 3.73e-02 1.62e-02 1.94e-01 1.95e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.12e-05 8.54e-07 2.89e-10 5.22e-18 1.21e-05 1.21e-05   erg/cm2
              Error 1.15e-06 1.34e-07 8.59e-10 2.95e-15 1.16e-06 1.16e-06   erg/cm2
Peak flux Cutoff-PL 6.67e-01 1.95e-01 3.10e-02 5.58e-03 8.98e-01 8.99e-01   ph/cm2/s
              Error -------- 8.94e-02 4.25e-02 1.63e-02 1.96e-01 1.96e-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    6.665    0.255    -      -           6.85e-05 1.51e-05   71.210 57
CPL   1.000    0.000      50.0    0.0      1.21e-03 0.00e+00  740.050 56
 
The chi2 of BB fit is 42.72 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    3.481    0.949    -      -           2.27e-03 2.10e-03   70.220 57
CPL   1.844    0.000       3.9    0.0      2.09e-02 0.00e+00   74.120 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  816.816 -183.252  633.564
T90   527.620   81.200  608.820
T50   254.948  245.048  499.996
Peak    1.000  410.728  411.728

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  244.9814 -15.8114 0.0680   23.7  -55.4      -1.7084    -2.8  TRIG_01125350       
------------------------------------------
 
Foreground time interval of the image:
-183.252  71.201 (delta_t = 254.453 [sec])
Background time interval of the image:
-239.000 -183.252 (delta_t =  55.748 [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)

Spectra

Notes:

Time averaged spectrum fit using the pre-slew DRM

Power-law model
Multiple GTIs in the spectrum
tstart tstop
-183.252000 353.210000
355.000000 407.150000
408.000000 633.564000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.66505     ( -0.255746   0.254197 )
Norm@50keV  : 6.85132E-05    ( -1.36791e-05   1.64564e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.21 using 59 PHA bins.
# Reduced chi-squared =          1.249 for     57 degrees of freedom 
# Null hypothesis probability =   9.759980e-02
 
Photon flux (15-150 keV)    in 814.2 sec: 0.554225 ( -0.0425625  0.0430327 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.31673e-05 ( -9.33708e-07  9.43316e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-183.252000 353.210000
355.000000 407.150000
408.000000 633.564000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.20533E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         740.05 using 59 PHA bins.
# Reduced chi-squared =         13.215 for     56 degrees of freedom 
# Null hypothesis probability =  4.337682e-120
 
Photon flux (15-150 keV)    in 814.2 sec: 0.504193 ( -0.054011  0.052506 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20669e-05 ( -1.17456e-06  1.14159e-06 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-183.252000 353.210000
355.000000 407.150000
408.000000 633.564000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.64634   (     )
beta        : -7.38061    (     )
Epeak [keV] : 19.6641      (   )
Norm@50keV   : 1.24414E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         652.31 using 59 PHA bins.
# Reduced chi-squared =         11.860 for     55 degrees of freedom 
# Null hypothesis probability =  4.742548e-103
 
Photon flux (15-150 keV)    in 814.2 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]    : 2.52413  (-0.108648  0.118113)
R^2/D10^2   : 234.454  (-77.9432   113.99)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.72 using 59 PHA bins.
# Reduced chi-squared =         0.7494 for     57 degrees of freedom 
# Null hypothesis probability =   9.200330e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.123e-05   1.201e-06
25- 50  8.577e-07   1.242e-07
50-150  2.976e-10   1.463e-10
15-150  1.208e-05   1.303e-06
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 4.16471       (-0.25073      0.282132)
Norm        : 250.943       (-72.3049     99.3638)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.169e-05   1.128e-06
25- 50  9.476e-07   1.264e-07
50-150  1.790e-09   8.366e-10
15-150  1.264e-05   1.352e-06
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.54767        (-0.108638      0.118122)
R1^2/D10^2  : 214.823        (-77.9504      113.981)
kT2 [keV]   : 0.644174        (-1.11182      25.3948)
R2^2/D10^2  : 3.26686E+08    (-3.51101e+08   6.46138e+12)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Peak spectrum fit

Power-law model
Time interval is from  410.728 sec. to  411.728 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.48083     ( -0.775089   1.12387 )
Norm@50keV  : 2.27334E-03    ( -0.00226961   0.00193237 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.22 using 59 PHA bins.
# Reduced chi-squared =          1.232 for     57 degrees of freedom 
# Null hypothesis probability =   1.122135e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.905194 ( -0.1941  0.193726 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.53418e-08 ( -1.00529e-08  1.14636e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  410.728 sec. to  411.728 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.84425     (     )
Epeak [keV] : 3.92777      (   )
Norm@50keV  : 2.08875E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.12 using 59 PHA bins.
# Reduced chi-squared =          1.324 for     56 degrees of freedom 
# Null hypothesis probability =   5.288717e-02
 
Photon flux (15-150 keV)    in 1 sec: 0.898059 ( -0.189705  0.202831 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.4412e-08 ( -9.2064e-09  1.24617e-08 ) ergs/cm2
 
Band function
Time interval is from  410.728 sec. to  411.728 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -6.23912   ( 6.23912   6.23912 )
beta        : -3.48336    ( -1.12094   0.776545 )
Epeak [keV] : 24.2096      ( -24.2096 -24.2096 )
Norm@50keV   : 0.308317    ( -0.30838   0.262711 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.22 using 59 PHA bins.
# Reduced chi-squared =          1.277 for     55 degrees of freedom 
# Null hypothesis probability =   8.111594e-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]    : 3.27289  (-0.77466  1.11812)
R^2/D10^2   : 66.2870  (-66.3192   303.492)
(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  2.086e-08   1.183e-08
25- 50  4.081e-09   2.460e-09
50-150  1.292e-11   1.436e-11
15-150  2.496e-08   1.404e-08
Thermal bremsstrahlung (OTTB)
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 9.39840       (-4.35185      20.6167)
Norm        : 33.2091       (-25.5536     129.268)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.995e-08   1.110e-08
25- 50  7.890e-09   4.801e-09
50-150  4.550e-10   4.375e-10
15-150  2.830e-08   1.639e-08
Double BB
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.48378        (-0.734672      0.850506)
R1^2/D10^2  : 320.104        (-272.027      4444.55)
kT2 [keV]   : 13.4682        (-4.07296      6.32596)
R2^2/D10^2  : 7.28023E-02    (-0.0574021   0.157201)
------------------------------------------------------------
 Reduced chi-squared = 
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.954e-08   1.092e-08
25- 50  1.120e-08   6.585e-09
50-150  1.170e-08   8.135e-09
15-150  4.245e-08   2.269e-08
Plot creation:
Tue Sep 27 07:28:41 EDT 2022