batgrbproduct analysis for trigger=773898

batgrbproduct Analysis for Trigger=773898

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Sep 25 04:33:19 EDT 2017
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger773898/GCN5_download_cron
======================================================================

  Trigger: 00773898      Segment: 000

  BAT Trigger Time: 527942560   [s; MET]
      Trigger Stop: 527942648   [s; MET]
               UTC: 2017-09-24T10:42:20.264340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 255.073464197006   Dec: -41.9341897045602  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.93
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.93

  Flight Position:   [ source = BAT ]
    RA: 255.073464197006   Dec: -41.9341897045602  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 255.074170193597   Dec: -41.9236043949075  [deg; J2000]  
        { 17h 00m 17.8s , -41d 55' 25.0" }
         +/- 3.09444815543089 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.51005582258895 [arcmin] (formal 1-sigma fit error)
    SNR: 6.05738561088675
 
  Angular difference between Flight and Ground position is 0.635900 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 88 +/- 
        Measured from: 0
                   to: 88     [s; relative to TRIGTIME]
     T50: 88 +/- 
        Measured from: 0
                   to: 88     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 88 second)
        Measured from: 0     
                   to: 88     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 88     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.383282   0.407782   0.064831   0.045436
           0.072345   0.065643   0.055559   0.052121 [error]
 Peak      0.383282   0.407782   0.064831   0.045436
           0.072345   0.065643   0.055559   0.052121 [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 1.06e-07 1.32e-07 1.19e-07 1.87e-07 4.22e-07 5.45e-07   erg/cm2
              Error 2.79e-08 2.88e-08 4.46e-08 1.34e-07 1.08e-07 1.93e-07   erg/cm2
Peak flux Power-law 3.96e-02 2.72e-02 1.23e-02 7.70e-03 8.28e-02 8.68e-02   ph/cm2/s
              Error 1.06e-02 5.83e-03 4.45e-03 5.13e-03 1.73e-02 1.84e-02   ph/cm2/s
 
Fluence   Cutoff-PL 9.61e-08 1.88e-07 3.15e-08 8.49e-11 3.16e-07 3.16e-07   erg/cm2
              Error 3.29e-08 4.35e-08 4.24e-08 2.78e-09 7.25e-08 7.25e-08   erg/cm2
Peak flux Cutoff-PL 3.41e-02 3.95e-02 3.84e-03 5.63e-06 7.74e-02 7.74e-02   ph/cm2/s
              Error 1.23e-02 8.86e-03 4.78e-03 1.72e-04 1.63e-02 1.63e-02   ph/cm2/s
 
Fluence        Band 9.54e-08 1.86e-07 3.99e-08 3.90e-09 3.26e-07 3.27e-07   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    2.149    0.372    -      -           5.14e-04 1.44e-04   58.750 57
CPL  -2.774    4.017      31.3    4.7      9.66e-01 1.99e+03   47.910 56
 
The chi2 of BB fit is 48.59 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    2.149    0.372    -      -           5.14e-04 1.44e-04   58.750 57
CPL  -2.774    4.017      31.3    4.7      9.66e-01 1.99e+03   47.910 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   88.000    0.000   88.000
T90    88.000    0.000   88.000
T50    88.000    0.000   88.000
Peak   88.000    0.000   88.000

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  255.0742 -41.9236 0.0316    8.0   25.1       0.8873     6.1  TRIG_00773898       
------------------------------------------
 
Foreground time interval of the image:
  0.000  88.000 (delta_t =  88.000 [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    0.000 sec. to   88.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.14894     ( -0.355262   0.38828 )
Norm@50keV  : 5.13552E-04    ( -0.000144429   0.000144351 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.75 using 59 PHA bins.
# Reduced chi-squared =          1.031 for     57 degrees of freedom 
# Null hypothesis probability =   4.109733e-01
 
Photon flux (15-150 keV)    in 88 sec: 8.28033E-02 ( -0.0173345  0.0173354 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.22236e-07 ( -1.04366e-07  1.108e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   88.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.77436     ( -5.34559   2.68839 )
Epeak [keV] : 31.2715      ( -4.36339 5.10528 )
Norm@50keV  : 0.965832    ( -1.12886   3975.44 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.91 using 59 PHA bins.
# Reduced chi-squared =         0.8555 for     56 degrees of freedom 
# Null hypothesis probability =   7.706016e-01
 
Photon flux (15-150 keV)    in 88 sec: 7.74290E-02 ( -0.0162537  0.016436 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.15803e-07 ( -6.85106e-08  7.65046e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   88.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.54455   ( -4.055   -4.22234 )
beta        : -5.23134    ( 4.50039   1.88601 )
Epeak [keV] : 30.9960      ( -6.13612 4.91475 )
Norm@50keV   : 3.25466    ( -3.24952   12.6811 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.71 using 59 PHA bins.
# Reduced chi-squared =         0.8675 for     55 degrees of freedom 
# Null hypothesis probability =   7.465779e-01
 
Photon flux (15-150 keV)    in 88 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.26412e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.01756  (-1.25533  1.52541)
R^2/D10^2   : 9.99572E-02  (-0.0512829   0.0996021)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.59 using 59 PHA bins.
# Reduced chi-squared =         0.8524 for     57 degrees of freedom 
# Null hypothesis probability =   7.785273e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.024e-07   3.841e-08
25- 50  1.799e-07   6.441e-08
50-150  4.759e-08   2.801e-08
15-150  3.299e-07   1.147e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 40.8307       (-14.7161      31.6785)
Norm        : 0.544666       (-0.168147     0.246405)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.68 using 59 PHA bins.
# Reduced chi-squared =         0.9592 for     57 degrees of freedom 
# Null hypothesis probability =   5.627453e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.108e-07   3.070e-08
25- 50  1.471e-07   5.360e-08
50-150  1.164e-07   7.894e-08
15-150  3.743e-07   1.182e-07
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 2.57984E-06        (-2.57989e-06      -2.57989e-06)
kT2 [keV]   : 7.82977        (-1.27022      1.56761)
R2^2/D10^2  : 0.107823    (-0.0563456   0.111829)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.59 using 59 PHA bins.
#Fit statistic : Chi-Squared =          48.13 using 59 PHA bins.
# Reduced chi-squared =         0.8834 for     55 degrees of freedom 
# Reduced chi-squared =         0.8752 for     55 degrees of freedom 
# Null hypothesis probability =   7.166085e-01
# Null hypothesis probability =   7.323082e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.024e-07   1.181e+00
25- 50  1.800e-07   1.012e+01
50-150  4.766e-08   2.658e+02
15-150  3.301e-07   2.707e+02

Peak spectrum fit

Power-law model
Time interval is from    0.000 sec. to   88.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.14894     ( -0.355262   0.38828 )
Norm@50keV  : 5.13552E-04    ( -0.000144429   0.000144351 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.75 using 59 PHA bins.
# Reduced chi-squared =          1.031 for     57 degrees of freedom 
# Null hypothesis probability =   4.109733e-01
 
Photon flux (15-150 keV)    in 88 sec: 8.28033E-02 ( -0.0173345  0.0173354 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.22236e-07 ( -1.04366e-07  1.108e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to   88.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.77436     ( -5.34559   2.68839 )
Epeak [keV] : 31.2715      ( -4.36339 5.10528 )
Norm@50keV  : 0.965832    ( -1.12886   3975.44 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.91 using 59 PHA bins.
# Reduced chi-squared =         0.8555 for     56 degrees of freedom 
# Null hypothesis probability =   7.706016e-01
 
Photon flux (15-150 keV)    in 88 sec: 7.74290E-02 ( -0.0162537  0.016436 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.15803e-07 ( -6.85106e-08  7.65046e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to   88.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.54455   ( -4.055   -4.22234 )
beta        : -5.23134    ( 4.50039   1.88601 )
Epeak [keV] : 30.9960      ( -6.13612 4.91475 )
Norm@50keV   : 3.25466    ( -3.24952   12.6854 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.71 using 59 PHA bins.
# Reduced chi-squared =         0.8675 for     55 degrees of freedom 
# Null hypothesis probability =   7.465779e-01
 
Photon flux (15-150 keV)    in 88 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.26412e-07 ( 0  0 ) ergs/cm2
 
Single BB
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 8.01756  (-1.25533  1.52541)
R^2/D10^2   : 9.99572E-02  (-0.0512829   0.0996021)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.59 using 59 PHA bins.
# Reduced chi-squared =         0.8524 for     57 degrees of freedom 
# Null hypothesis probability =   7.785273e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.024e-07   3.777e-08
25- 50  1.799e-07   6.050e-08
50-150  4.759e-08   2.774e-08
15-150  3.299e-07   1.198e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 40.8307       (-14.7161      31.6785)
Norm        : 0.544666       (-0.168147     0.246405)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.68 using 59 PHA bins.
# Reduced chi-squared =         0.9592 for     57 degrees of freedom 
# Null hypothesis probability =   5.627453e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.108e-07   3.074e-08
25- 50  1.471e-07   5.394e-08
50-150  1.164e-07   7.573e-08
15-150  3.743e-07   1.435e-07
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 2.57984E-06        (-2.57989e-06      -2.57989e-06)
kT2 [keV]   : 7.82977        (-1.27022      1.56761)
R2^2/D10^2  : 0.107823    (-0.0563456   0.111829)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.59 using 59 PHA bins.
#Fit statistic : Chi-Squared =          48.13 using 59 PHA bins.
# Reduced chi-squared =         0.8834 for     55 degrees of freedom 
# Reduced chi-squared =         0.8752 for     55 degrees of freedom 
# Null hypothesis probability =   7.166085e-01
# Null hypothesis probability =   7.323082e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.024e-07   1.286e+00
25- 50  1.800e-07   1.039e+01
50-150  4.766e-08   2.552e+02
15-150  3.301e-07   2.495e+02
Plot creation:
Mon Sep 25 04:48:44 EDT 2017