batgrbproduct analysis for trigger=1006907

batgrbproduct Analysis for Trigger=1006907

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.48
    Process Start Time (local time): Tue Nov 17 19:18:18 EST 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger1006907/GCN5_download_cron
======================================================================

  Trigger: 01006907      Segment: 000

  BAT Trigger Time: 627260803.904   [s; MET]
      Trigger Stop: 627260804.928   [s; MET]
               UTC: 2020-11-16T23:06:17.909620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 85.7535530911431   Dec: 25.2606185417606  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    9.72
     Image Trigger?:     NO
     Rate S/N Ratio:     17.5499287747842  [ if not an image trigger ]
     Image S/N Ratio:    9.72

  Flight Position:   [ source = BAT ]
    RA: 85.7535530911431   Dec: 25.2606185417606  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 85.7266680607827   Dec: 25.4047875390505  [deg; J2000]  
        { 05h 42m 54.4s , +25d 24' 17.2" }
         +/- 2.31735581906266 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.22456134471587 [arcmin] (formal 1-sigma fit error)
    SNR: 9.15588237287667
 
  Angular difference between Flight and Ground position is 8.772151 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 416 +/- 64
        Measured from: -127.90399992466
                   to: 288.09600007534     [s; relative to TRIGTIME]
     T50: 208 +/- 16
        Measured from: 16.0960000753403
                   to: 224.09600007534     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 231.595999956131     
                   to: 232.595999956131     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -207.904000043869     
                   to: 288.095999956131     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total   102.159715  77.570844  10.327958   0.133116
           0.210300   0.198880   0.140087   0.127239 [error]
 Peak      0.229832   0.148693   0.013213  -0.004814
           0.009766   0.008736   0.006206   0.005622 [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 5.12e-05 2.63e-05 8.35e-06 3.40e-06 8.77e-05 8.92e-05   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux Power-law 2.39e+00 9.70e-01 2.32e-01 6.73e-02 3.63e+00 3.66e+00   ph/cm2/s
              Error 2.07e-01 7.85e-02 3.82e-02 1.93e-02 2.59e-01 2.60e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.14e-05 3.15e-05 7.41e-06 2.26e-07 7.05e-05 7.05e-05   erg/cm2
              Error 1.69e-06 5.94e-07 2.21e-07 3.98e-08 1.98e-06 1.99e-06   erg/cm2
Peak flux Cutoff-PL 2.20e+00 1.15e+00 1.14e-01 1.17e-03 3.47e+00 3.47e+00   ph/cm2/s
              Error 2.30e-01 1.02e-01 4.75e-02 2.61e-03 2.64e-01 2.64e-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    3.654    0.000    -      -           1.03e-02 0.00e+00  883.620 57
CPL   0.439    0.240      20.3    1.7      6.17e-01 1.88e-01   30.470 56
 
The chi2 of BB fit is 209.31 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    3.065    0.159    -      -           1.26e-02 1.61e-03   90.100 57
CPL   0.380    1.108      18.6    5.9      8.45e-01 3.03e+00   61.600 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: 123.328000 sec.
T50 in the 50-300 keV band: 76.416000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  496.000 -207.904  288.096
T90   416.000 -127.904  288.096
T50   208.000   16.096  224.096
Peak    1.000  231.596  232.596

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   85.7267 +25.4048 0.0211    0.2  166.4      12.2134     9.2  TRIG_01006907       
------------------------------------------
 
Foreground time interval of the image:
-207.904 -159.404 (delta_t =  48.500 [sec])
-157.904 -28.064 (delta_t = 129.840 [sec])
-26.904 288.096 (delta_t = 315.000 [sec])
Background time interval of the image:
-239.904 -207.904 (delta_t =  32.000 [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
-207.904000 -159.404000
-157.904000 -28.064000
-26.904000 288.096000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.65405     (     )
Norm@50keV  : 1.02501E-02    (     )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  883.62     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.37e-148 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 493.3 sec: 4.70549 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.77073e-05 ( 0  0 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-207.904000 -159.404000
-157.904000 -28.064000
-26.904000 288.096000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.439130     ( -0.244123   0.235916 )
Epeak [keV] : 20.2732      ( -1.74446 1.56795 )
Norm@50keV  : 0.617078    ( -0.156699   0.218658 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   30.47     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 9.98e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 493.3 sec: 3.42638 ( -0.12612  0.12815 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.05315e-05 ( -1.97419e-06  1.99491e-06 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-207.904000 -159.404000
-157.904000 -28.064000
-26.904000 288.096000
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.435677   ( -0.238052   0.260767 )
beta        : -8.26680    ( 8.9912   8.13324 )
Epeak [keV] : 20.2865      ( -1.74288 1.6419 )
Norm@50keV   : 0.620214    ( -0.155064   0.241591 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 493.3 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]    : 7.46033  (  )
R^2/D10^2   : 4.43391  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                  209.31     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.92e-19 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.079e-05   6.561e-07
25- 50  3.212e-05   6.018e-07
50-150  6.665e-06   1.875e-07
15-150  5.958e-05   1.258e-06
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 18.5774       (-0.334382      0.344095)
Norm        : 51.9769       (-2.20834     2.29228)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   78.14     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.30e-02 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.725e-05   1.115e-06
25- 50  3.076e-05   5.821e-07
50-150  8.116e-06   2.393e-07
15-150  7.613e-05   1.505e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.02768        (-0.440252      0.441127)
R1^2/D10^2  : 18.1485        (-4.73216      7.76224)
kT2 [keV]   : 9.24576        (-0.46332      0.629637)
R2^2/D10^2  : 0.919027    (-0.368078   0.442696)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   26.45     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.00e+00 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.990e-05   2.272e-06
25- 50  3.168e-05   1.702e-06
50-150  7.630e-06   7.054e-07
15-150  6.921e-05   4.144e-06

Peak spectrum fit

Power-law model
Time interval is from  231.596 sec. to  232.596 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.06512     ( -0.15479   0.162402 )
Norm@50keV  : 1.25838E-02    ( -0.00159274   0.00162438 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   90.10     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.40e-03 with 57 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.62991 ( -0.259293  0.259504 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.55898e-07 ( -1.194e-08  1.20649e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  231.596 sec. to  232.596 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.380254     ( -1.21718   0.997927 )
Epeak [keV] : 18.5864      ( -7.22882 4.48528 )
Norm@50keV  : 0.845101    ( -0.84734   5.21765 )
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   61.60     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.83e-01 with 56 degrees of freedom
 
Photon flux (15-150 keV)    in 1 sec: 3.46612 ( -0.26347  0.26367 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39171e-07 ( -1.0843e-08  1.1147e-08 ) ergs/cm2
 
Band function
Time interval is from  231.596 sec. to  232.596 sec.
XSPEC12>exit
 XSPEC: quit
 
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.380069   ( -0.928993   0.453264 )
beta        : -10.0000    ( 10   10 )
Epeak [keV] : 18.5864      ( -7.21874 3.83189 )
Norm@50keV   : 0.845096    ( -0.845084   5.22304 )
------------------------------------------------------------
 
Photon flux (15-150 keV)    in 1 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]    : 5.89298  (-0.390632  0.417729)
R^2/D10^2   : 14.1873  (-3.93335   5.49465)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   69.14     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 1.30e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.376e-08   6.525e-09
25- 50  6.113e-08   6.065e-09
50-150  5.197e-09   1.596e-09
15-150  1.301e-07   1.090e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 18.8036       (-2.20465      2.57283)
Norm        : 47.5011       (-7.87992     9.67341)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   64.22     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 2.39e-01 with 57 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.979e-08   6.260e-09
25- 50  5.820e-08   5.435e-09
50-150  1.568e-08   4.385e-09
15-150  1.437e-07   1.205e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 4.39659        (-1.09916      0.926023)
R1^2/D10^2  : 36.6600        (-18.0422      64.4398)
kT2 [keV]   : 8.86646        (-5.05352      3.56899)
R2^2/D10^2  : 1.10335    (-0.994456   3.53974)
------------------------------------------------------------
#Fit statistic  : Chi-Squared                   59.78     using 59 bins.
 Reduced chi-squared = 
# Null hypothesis probability of 3.06e-01 with 55 degrees of freedom
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.851e-08   3.566e-08
25- 50  5.906e-08   2.985e-08
50-150  1.318e-08   7.285e-09
15-150  1.408e-07   7.095e-08
Plot creation:
Tue Nov 17 19:20:35 EST 2020