batgrbproduct Analysis for Trigger=675784

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Feb 25 11:07:31 EST 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger675784/GCN5_download_cron
======================================================================

  Trigger: 00675784      Segment: 000

  BAT Trigger Time: 478014272   [s; MET]
      Trigger Stop: 478014336   [s; MET]
               UTC: 2016-02-24T13:44:16.111260    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 294.956450826085   Dec: -10.3222732546401  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    6.05
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    6.05

  Flight Position:   [ source = BAT ]
    RA: 294.956450826085   Dec: -10.3222732546401  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 294.934261882868   Dec: -10.3254213919588  [deg; J2000]  
        { 19h 39m 44.2s , -10d 19' 31.5" }
         +/- 3.21452529058528 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.58526111998001 [arcmin] (formal 1-sigma fit error)
    SNR: 5.73674758469873
 
  Angular difference between Flight and Ground position is 1.323333 arcmin
 
  Partial Coding Fraction: 0.8671875    [ including projection effects ]

  Duration
     T90: 0.0239999890327454 +/- 0.0113137314268704
        Measured from: -127.039999902248
                   to: -127.015999913216     [s; relative to TRIGTIME]
     T50: 0.0079999566078186 +/- 0.0113137314268704
        Measured from: -127.031999886036
                   to: -127.023999929428     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -127.523999989033     
                   to: -126.523999989033     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -127.040000021458     
                   to: -127.012000024319     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.003774   0.002986   0.000311   0.001802
           0.000968   0.001002   0.000739   0.000760 [error]
 Peak      0.001615   0.003876   0.006783   0.001121
           0.006117   0.005787   0.004853   0.004206 [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 8.93e-10 4.53e-10 1.50e-10 5.73e-11 1.54e-09 1.52e-09   erg/cm2
              Error 3.87e-10 2.65e-10 1.60e-10 1.10e-10 7.22e-10 7.54e-10   erg/cm2
Peak flux Power-law 2.51e-021.82e-061.10e-06 3.61e-022.86e-051.83e-05 3.87e-024.15e-042.23e-04 7.72e-023.54e-02 1.24e-012.13e-031.19e-03 1.77e-013.56e-02   ph/cm2/s
              Error 5.90e-02 4.30e-02 3.79e-02 3.94e-01 1.29e-01 4.05e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.07e-09 8.67e-10 2.06e-11 5.63e-16 1.96e-09 1.96e-09   erg/cm2
              Error 4.87e-10 4.86e-10 8.65e-11 1.33e-12 7.25e-10 7.25e-10   erg/cm2
Peak flux Cutoff-PL 2.74e-02 3.77e-02 3.83e-02 7.07e-02 1.26e-01 1.75e-01   ph/cm2/s
              Error 5.91e-02 4.31e-02 4.55e-02 -------- 1.29e-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    3.655    0.899    -      -           3.15e-03 2.96e-03   44.520 57
CPL   1.000    0.000      50.0    0.0      7.48e-03 0.00e+00   57.250 56
 
The chi2 of BB fit is 37.54 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   -2.946    0.000    -      -           1.55e-06 1.49e-06   55.110 57
CPL  -5.597    0.000    9999.4    0.0      7.15e-10 0.00e+00   55.080 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    0.028 -127.040 -127.012
T90     0.024 -127.040 -127.016
T50     0.008 -127.032 -127.024
Peak    1.000 -127.524 -126.524

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  294.9343 -10.3254 0.0336   15.1  -81.1       0.0102     5.7  TRIG_00675784       
------------------------------------------
 
Foreground time interval of the image:
-127.040 -127.012 (delta_t =   0.028 [sec])
Background time interval of the image:
-142.899 -127.040 (delta_t =  15.859 [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 -127.040 sec. to -127.012 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.65489     ( -0.703055   1.09421 )
Norm@50keV  : 3.14547E-03    ( -0.00313813   0.00278712 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.52 using 59 PHA bins.
# Reduced chi-squared =         0.7810 for     57 degrees of freedom 
# Null hypothesis probability =   8.856786e-01
 
Photon flux (15-150 keV)    in 0.028 sec: 1.44566 ( -0.625755  0.626064 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53949e-09 ( -6.83015e-10  7.6099e-10 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -127.040 sec. to -127.012 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 7.47887E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.25 using 59 PHA bins.
# Reduced chi-squared =          1.022 for     56 degrees of freedom 
# Null hypothesis probability =   4.285156e-01
 
Photon flux (15-150 keV)    in 0.028 sec: 1.84361 ( -0.66286  0.66174 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.95514e-09 ( -7.13034e-10  7.36417e-10 ) ergs/cm2
 
Band function
Time interval is from -127.040 sec. to -127.012 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.74844   ( 0.71543   9.74844 )
beta        : -3.68322    ( -1.09166   0.705642 )
Epeak [keV] : 66.5091      ( -66.5091 -66.5091 )
Norm@50keV   : 0.416672    ( -0.42144   0.383897 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.52 using 59 PHA bins.
# Reduced chi-squared =         0.8094 for     55 degrees of freedom 
# Null hypothesis probability =   8.429262e-01
 
Photon flux (15-150 keV)    in 0.028 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]    : 5.45704  (-1.32621  1.48246)
R^2/D10^2   : 11.2172  (-11.2176   29.4902)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.54 using 59 PHA bins.
# Reduced chi-squared =         0.6586 for     57 degrees of freedom 
# Null hypothesis probability =   9.783004e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.070e-09   6.363e-10
25- 50  8.621e-10   5.650e-10
50-150  5.263e-11   5.369e-11
15-150  1.985e-09   1.251e-09
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 13.5004       (-4.96502      7.53517)
Norm        : 35.6308       (-13.4561     13.4561)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.32 using 59 PHA bins.
# Reduced chi-squared =         0.7073 for     57 degrees of freedom 
# Null hypothesis probability =   9.538692e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.056e-09   1.209e-09
25- 50  6.505e-10   1.349e-09
50-150  9.265e-11   5.702e-10
15-150  1.799e-09   3.279e-09
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.46614        (-5.46141      -5.46141)
R1^2/D10^2  : 6.64250        (-6.64182      -6.64182)
kT2 [keV]   : 5.44454        (-5.45608      -5.45608)
R2^2/D10^2  : 4.57272    (-4.57324   -4.57324)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.54 using 59 PHA bins.
# Reduced chi-squared =         0.6826 for     55 degrees of freedom 
# Null hypothesis probability =   9.654119e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.070e-09   4.252e-02
25- 50  8.623e-10   3.840e-01
50-150  5.266e-11   9.934e+00
15-150  1.985e-09   9.412e+00

Peak spectrum fit

Power-law model
Time interval is from -127.524 sec. to -126.524 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.94613     ( 2.94613   2.94613 )
Norm@50keV  : 1.54742E-06    ( -1.54742e-06   1.43363e-06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.11 using 59 PHA bins.
# Reduced chi-squared =         0.9669 for     57 degrees of freedom 
# Null hypothesis probability =   5.462421e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.123699 2.13061E-03 1.19353E-03 ( -0.123699  0.134552 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.91954e-18 ( -1.19003e-08  1.21173e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from -127.524 sec. to -126.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -5.59689     ( 5.59689   5.59689 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 7.14672E-10    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.08 using 59 PHA bins.
# Reduced chi-squared =         0.9836 for     56 degrees of freedom 
# Null hypothesis probability =   5.095910e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.125768 2.72488E-08 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.1292e-23 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from -127.524 sec. to -126.524 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.921291   ( 0.921291   0.921291 )
beta        : 6.31340    ( -6.3134   -6.3134 )
Epeak [keV] : 35.6418      ( -35.6418 -35.6418 )
Norm@50keV   : 7.94789E-14    ( -7.94789e-14   1.332e+07 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.08 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     55 degrees of freedom 
# Null hypothesis probability =   4.715411e-01
 
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]    : 38.4806  (-38.2522  -38.2522)
R^2/D10^2   : 8.75442E-04  (-0.000896236   -0.000896236)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.41 using 59 PHA bins.
# Reduced chi-squared =         0.9722 for     57 degrees of freedom 
# Null hypothesis probability =   5.347523e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.719e-10   1.328e-10
25- 50  1.159e-09   9.075e-10
50-150  1.055e-08   8.515e-09
15-150  1.189e-08   7.895e-09
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.361       (-199.363      -199.363)
Norm        : 0.531497       (-0.531947     0.531607)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.55 using 59 PHA bins.
# Reduced chi-squared =         0.9746 for     57 degrees of freedom 
# Null hypothesis probability =   5.294512e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.324e-09   1.059e-09
25- 50  2.546e-09   2.068e-09
50-150  5.584e-09   4.563e-09
15-150  9.453e-09   7.290e-09
Double BB
# Reduced chi-squared =         0.9912 for     55 degrees of freedom 
# Reduced chi-squared =         0.9901 for     55 degrees of freedom 
# Reduced chi-squared =         0.9894 for     55 degrees of freedom 
# Reduced chi-squared =         0.9891 for     55 degrees of freedom 
# Reduced chi-squared =         0.9889 for     55 degrees of freedom 
# Null hypothesis probability =   4.838294e-01
# Null hypothesis probability =   4.851460e-01
# Null hypothesis probability =   4.896080e-01
# Null hypothesis probability =   4.929975e-01
# Null hypothesis probability =   4.954096e-01
# Null hypothesis probability =   4.967628e-01
# Null hypothesis probability =   4.974789e-01
# Null hypothesis probability =   4.978791e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.416e-09   1.055e-09
25- 50  1.896e-09   1.131e-09
50-150  1.018e-08   6.790e-09
15-150  1.349e-08   7.875e-09
Plot creation:
Thu Feb 25 11:16:30 EST 2016