batgrbproduct analysis for trigger=954840

batgrbproduct Analysis for Trigger=954840

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Feb  8 01:37:24 EST 2020
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger954840/GCN5_download_cron
======================================================================

  Trigger: 00954840      Segment: 000

  BAT Trigger Time: 602737362.496   [s; MET]
      Trigger Stop: 602737363.52   [s; MET]
               UTC: 2020-02-07T03:02:18.103520    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 163.62331031106   Dec: -49.5813151574992  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.53
     Image Trigger?:     NO
     Rate S/N Ratio:     18.5741756210067  [ if not an image trigger ]
     Image S/N Ratio:    6.53

  Flight Position:   [ source = BAT ]
    RA: 163.62331031106   Dec: -49.5813151574992  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 163.541107556817   Dec: -49.6017053267019  [deg; J2000]  
        { 10h 54m 09.9s , -49d 36' 06.1" }
         +/- 3.67780766437152 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.40733242602317 [arcmin] (formal 1-sigma fit error)
    SNR: 4.732973523044
 
  Angular difference between Flight and Ground position is 3.423268 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 1.0239999294281 +/- 
        Measured from: 0
                   to: 1.0239999294281     [s; relative to TRIGTIME]
     T50: 1.0239999294281 +/- 
        Measured from: 0
                   to: 1.0239999294281     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1.0239999294281 second)
        Measured from: 0     
                   to: 1.0239999294281     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1.0239999294281     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    -0.005801   0.009375   0.026558   0.029807
           0.007342   0.008026   0.007607   0.008754 [error]
 Peak     -0.005801   0.009375   0.026558   0.029807
           0.007342   0.008026   0.007607   0.008754 [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 4.29e-10 2.72e-09 1.51e-08 3.92e-07 5.02e-08 4.10e-07   erg/cm2
              Error 9.23e-10 3.27e-09 1.13e-08 5.68e-07 3.53e-08 5.74e-07   erg/cm2
Peak flux Power-law 1.29e-02 4.35e-02 1.21e-01 1.01e+00 3.32e-01 1.19e+00   ph/cm2/s
              Error 2.84e-02 5.40e-02 9.17e-02 1.32e+00 2.31e-01 1.10e+00   ph/cm2/s
 
Fluence   Cutoff-PL 3.75e-10 2.64e-09 1.55e-08 3.24e-07 5.06e-08 3.42e-07   erg/cm2
              Error 9.21e-10 2.30e-09 1.34e-08 1.55e-06 2.07e-08 5.17e-07   erg/cm2
Peak flux Cutoff-PL 1.13e-02 4.19e-02 1.23e-01 8.70e-01 3.32e-01 1.06e+00   ph/cm2/s
              Error 2.83e-02 5.39e-02 8.23e-02 1.57e+00 2.07e-01 1.94e+00   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   -0.475    1.476    -      -           2.00e-03 1.78e-03   43.270 57
CPL  -0.714    0.000     975.3    0.0      2.30e-03 0.00e+00   43.270 56
 
The chi2 of BB fit is  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   -0.475    1.476    -      -           2.00e-03 1.78e-03   43.270 57
CPL  -0.714    5.244     975.3    0.0      2.30e-03 5.64e-01   43.270 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    1.024    0.000    1.024
T90     1.024    0.000    1.024
T50     1.024    0.000    1.024
Peak    1.024    0.000    1.024

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  163.5411 -49.6017 0.0407   28.2 -155.5       0.0812     4.7  TRIG_00954840       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-60.496 -55.020 (delta_t =   5.476 [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
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.475061     ( -1.93756   1.01476 )
Norm@50keV  : 2.00417E-03    ( -0.0016775   0.00187482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.27 using 59 PHA bins.
# Reduced chi-squared =         0.7592 for     57 degrees of freedom 
# Null hypothesis probability =   9.103011e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.331963 ( -0.29809  0.163277 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.01992e-08 ( -5.01992e-08  2.03052e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.713560     (     )
Epeak [keV] : 975.285      (   )
Norm@50keV  : 2.29825E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.27 using 59 PHA bins.
# Reduced chi-squared =         0.7726 for     56 degrees of freedom 
# Null hypothesis probability =   8.933572e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.332129 ( -0.25111  0.16247 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.0559e-08 ( -2.04578e-08  2.08732e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.306605   ( -0.306605   -0.306605 )
beta        : 0.475045    ( -1.01473   1.93813 )
Epeak [keV] : 22.0057      ( -22.0057 -22.0057 )
Norm@50keV   : 3.35385E-03    ( -0.00335384   3106.18 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.27 using 59 PHA bins.
# Reduced chi-squared =         0.7868 for     55 degrees of freedom 
# Null hypothesis probability =   8.737968e-01
 
Photon flux (15-150 keV)    in 1.024 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]    : 96.1075  (-99.155  -99.155)
R^2/D10^2   : 5.05439E-04  (-0.000487639   0.00489382)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.30 using 59 PHA bins.
# Reduced chi-squared =         0.7596 for     57 degrees of freedom 
# Null hypothesis probability =   9.098633e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.015e-10   2.192e-10
25- 50  2.422e-09   1.881e-09
50-150  4.663e-08   4.135e-08
15-150  4.935e-08   4.472e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.343       (-125.358      -199.356)
Norm        : 1.08096       (-0.751529     0.756047)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.24 using 59 PHA bins.
# Reduced chi-squared =         0.9516 for     57 degrees of freedom 
# Null hypothesis probability =   5.792537e-01
 
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
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 4.04903E-05        (-4.09198e-05      -4.09198e-05)
kT2 [keV]   : 84.5953        (-84.4589      -84.4589)
R2^2/D10^2  : 4.99298E-04    (-0.000498071   0.200886)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.29 using 59 PHA bins.
#Fit statistic : Chi-Squared =          43.28 using 59 PHA bins.
# Reduced chi-squared =         0.7871 for     55 degrees of freedom 
# Reduced chi-squared =         0.7869 for     55 degrees of freedom 
# Null hypothesis probability =   8.733627e-01
# Null hypothesis probability =   8.736823e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.281e-10   4.782e-09
25- 50  2.605e-09   4.116e-08
50-150  4.777e-08   9.810e-07
15-150  5.071e-08   1.265e-06

Peak spectrum fit

Power-law model
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.475061     ( -1.93756   1.01476 )
Norm@50keV  : 2.00417E-03    ( -0.0016775   0.00187482 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.27 using 59 PHA bins.
# Reduced chi-squared =         0.7592 for     57 degrees of freedom 
# Null hypothesis probability =   9.103011e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.331963 ( -0.29809  0.163277 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.01992e-08 ( -5.01992e-08  2.03052e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.713560     ( -9.24623   1.24093 )
Epeak [keV] : 975.285      ( -980.467 -980.467 )
Norm@50keV  : 2.29825E-03    ( -0.00229627   1.1249 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.27 using 59 PHA bins.
# Reduced chi-squared =         0.7726 for     56 degrees of freedom 
# Null hypothesis probability =   8.933572e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.332129 ( -0.25111  0.16247 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.0559e-08 ( -2.04578e-08  2.08732e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.306605   ( -0.306605   -0.306605 )
beta        : 0.475045    ( -1.01473   1.93813 )
Epeak [keV] : 22.0057      ( -22.0057 -22.0057 )
Norm@50keV   : 3.35385E-03    ( -0.00335384   3106.18 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.27 using 59 PHA bins.
# Reduced chi-squared =         0.7868 for     55 degrees of freedom 
# Null hypothesis probability =   8.737968e-01
 
Photon flux (15-150 keV)    in 1.024 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]    : 96.1075  (-99.155  -99.155)
R^2/D10^2   : 5.05439E-04  (-0.000487639   0.00489382)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.30 using 59 PHA bins.
# Reduced chi-squared =         0.7596 for     57 degrees of freedom 
# Null hypothesis probability =   9.098633e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.015e-10   2.254e-10
25- 50  2.422e-09   1.732e-09
50-150  4.663e-08   3.706e-08
15-150  4.935e-08   4.350e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.343       (-125.358      -199.356)
Norm        : 1.08096       (-0.751529     0.756047)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.24 using 59 PHA bins.
# Reduced chi-squared =         0.9516 for     57 degrees of freedom 
# Null hypothesis probability =   5.792537e-01
 
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
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 4.04903E-05        (-4.09198e-05      -4.09198e-05)
kT2 [keV]   : 84.5953        (-84.4589      -84.4589)
R2^2/D10^2  : 4.99298E-04    (-0.000498071   0.200886)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.29 using 59 PHA bins.
#Fit statistic : Chi-Squared =          43.28 using 59 PHA bins.
# Reduced chi-squared =         0.7871 for     55 degrees of freedom 
# Reduced chi-squared =         0.7869 for     55 degrees of freedom 
# Null hypothesis probability =   8.733627e-01
# Null hypothesis probability =   8.736823e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.281e-10   4.920e-09
25- 50  2.605e-09   3.974e-08
50-150  4.777e-08   1.052e-06
15-150  5.071e-08   1.051e-06
Plot creation:
Sat Feb  8 01:40:16 EST 2020