batgrbproduct Analysis for Trigger=638808

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Apr 24 08:12:35 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger638808/GCN5_download_cron
======================================================================

  Trigger: 00638808      Segment: 000

  BAT Trigger Time: 451463298.176   [s; MET]
      Trigger Stop: 451463298.432   [s; MET]
               UTC: 2015-04-23T06:28:04.692100    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 221.600452494162   Dec: 12.2883046095778  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.41
     Image Trigger?:     NO
     Rate S/N Ratio:     41.2431812546026  [ if not an image trigger ]
     Image S/N Ratio:    10.41

  Flight Position:   [ source = BAT ]
    RA: 221.600452494162   Dec: 12.2883046095778  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 221.60148202937   Dec: 12.264825377864  [deg; J2000]  
        { 14h 46m 24.4s , +12d 15' 53.4" }
         +/- 1.86594058528002 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.832985175376475 [arcmin] (formal 1-sigma fit error)
    SNR: 12.4773255683808
 
  Angular difference between Flight and Ground position is 1.410046 arcmin
 
  Partial Coding Fraction: 0.9296875    [ including projection effects ]

  Duration
     T90: 0.215999901294708 +/- 0.0282842442734789
        Measured from: 0.0120001435279846
                   to: 0.228000044822693     [s; relative to TRIGTIME]
     T50: 0.119999945163727 +/- 0.030463099373373
        Measured from: 0.0720001459121704
                   to: 0.192000091075897     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.374000012874603     
                   to: 0.625999987125397     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.00800001621246338     
                   to: 0.240000009536743     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.011809   0.028803   0.040808   0.015643
           0.003369   0.004124   0.004358   0.003601 [error]
 Peak      0.016772   0.033722   0.050975   0.011420
           0.006065   0.006585   0.006024   0.005206 [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 3.76e-09 1.05e-08 2.36e-08 1.42e-07 6.36e-08 1.80e-07   erg/cm2
              Error 1.05e-09 1.78e-09 3.75e-09 5.06e-08 1.02e-08 5.28e-08   erg/cm2
Peak flux Power-law 1.72e-01 2.51e-01 2.72e-01 5.51e-01 8.64e-01 1.25e+00   ph/cm2/s
              Error 5.90e-02 5.25e-02 4.62e-02 2.07e-01 1.42e-01 2.30e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.83e-09 1.11e-08 2.66e-08 4.61e-08 6.13e-08 8.66e-08   erg/cm2
              Error 1.33e-09 2.11e-09 4.91e-09 5.95e-08 1.08e-08 5.94e-08   erg/cm2
Peak flux Cutoff-PL 1.29e-01 2.58e-01 3.02e-01 2.46e-01 8.28e-01 9.35e-01   ph/cm2/s
              Error 7.47e-02 6.04e-02 6.09e-02 -------- 1.51e-01 3.24e-01   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   erg/cm2
              Error -------- -------- -------- -------- -------- --------   erg/cm2
Peak flux      Band 1.33e-01 2.57e-01 3.00e-01 2.72e-01 8.33e-01 9.64e-01   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    0.827    0.238    -      -           2.37e-02 3.43e-03   94.450 57
CPL  -0.250    1.219     123.5 1094.1      6.92e-02 1.10e-01   91.370 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.882    0.284    -      -           7.53e-03 1.24e-03   57.900 57
CPL  -0.099    1.440     125.8  -39.7      1.98e-02 5.00e-02   56.130 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: 0.192000 sec.
T50 in the 50-300 keV band: 0.128000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.232    0.008    0.240
T90     0.216    0.012    0.228
T50     0.120    0.072    0.192
Peak    1.000   -0.374    0.626

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  221.6015 +12.2648 0.0154   12.3   57.6       0.0985    12.5  TRIG_00638808       
------------------------------------------
 
Foreground time interval of the image:
  0.008   0.240 (delta_t =   0.232 [sec])
Background time interval of the image:
-239.176 -56.606 (delta_t = 182.570 [sec])
-55.176   0.008 (delta_t =  55.184 [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    0.008 sec. to    0.240 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.827218     ( -0.241602   0.234667 )
Norm@50keV  : 2.37432E-02    ( -0.00343126   0.0034197 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          94.45 using 59 PHA bins.
# Reduced chi-squared =          1.657 for     57 degrees of freedom 
# Null hypothesis probability =   1.335851e-03
 
Photon flux (15-150 keV)    in 0.232 sec: 2.72667 ( -0.390989  0.391226 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.3646e-08 ( -1.01683e-08  1.02677e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.008 sec. to    0.240 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.249853     ( -1.39068   1.04636 )
Epeak [keV] : 123.504      ( -38.9511 2149.32 )
Norm@50keV  : 6.91655E-02    ( -0.0440988   0.175395 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          91.37 using 59 PHA bins.
# Reduced chi-squared =          1.632 for     56 degrees of freedom 
# Null hypothesis probability =   1.986517e-03
 
Photon flux (15-150 keV)    in 0.232 sec: 2.64386 ( -0.40367  0.40148 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.12564e-08 ( -1.07824e-08  1.08012e-08 ) ergs/cm2
 
Band function
Time interval is from    0.008 sec. to    0.240 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.174006   ( -0.470351   1.19287 )
beta        : -10.0000    ( 10   3.55271e-15 )
Epeak [keV] : 129.098      ( -33.2733 383.451 )
Norm@50keV   : 6.39300E-02    ( -0.0389974   0.181698 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          91.38 using 59 PHA bins.
# Reduced chi-squared =          1.661 for     55 degrees of freedom 
# Null hypothesis probability =   1.494951e-03
 
Photon flux (15-150 keV)    in 0.232 sec: 2.64376 (    ) 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]    : 23.9313  (-3.86762  4.99699)
R^2/D10^2   : 8.18013E-02  (-0.0352671   0.0572554)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          92.97 using 59 PHA bins.
# Reduced chi-squared =          1.631 for     57 degrees of freedom 
# Null hypothesis probability =   1.847358e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.931e-09   5.748e-10
25- 50  1.071e-08   2.275e-09
50-150  4.571e-08   1.179e-08
15-150  5.835e-08   1.299e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 10.0413       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         116.40 using 59 PHA bins.
# Reduced chi-squared =         2.0422 for     57 degrees of freedom 
# Null hypothesis probability =   5.845409e-06
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.801e-09   3.316e-09
25- 50  1.116e-08   6.422e-09
50-150  2.447e-08   1.401e-08
15-150  4.143e-08   2.329e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.20619        (-5.20644      -5.20644)
R1^2/D10^2  : 2.60706        (-2.60668      -2.60668)
kT2 [keV]   : 26.7526        (-5.33332      170.873)
R2^2/D10^2  : 5.56110E-02    (-0.0556097   0.0434025)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          90.42 using 59 PHA bins.
# Reduced chi-squared =          1.644 for     55 degrees of freedom 
# Null hypothesis probability =   1.848237e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.270e-09   1.666e-09
25- 50  1.031e-08   4.540e-09
50-150  4.756e-08   2.086e-08
15-150  6.114e-08   2.693e-08

Peak spectrum fit

Power-law model
Time interval is from   -0.374 sec. to    0.626 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.882094     ( -0.291503   0.275726 )
Norm@50keV  : 7.53189E-03    ( -0.00124619   0.00123461 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.90 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     57 degrees of freedom 
# Null hypothesis probability =   4.418528e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.864411 ( -0.141898  0.142489 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.51221e-08 ( -1.47452e-08  1.49009e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.374 sec. to    0.626 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -9.94456E-02     ( -1.78874   1.0914 )
Epeak [keV] : 125.832      ( -46.4245 -125.83 )
Norm@50keV  : 1.98055E-02    ( -0.019806   0.0801214 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.13 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     56 degrees of freedom 
# Null hypothesis probability =   4.699503e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.827530 ( -0.152175  0.150746 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.1061e-08 ( -1.62219e-08  1.60792e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.374 sec. to    0.626 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 8.96332E-02   ( -0.930791   1.37302 )
beta        : -10.0000    ( 10   7.81597e-14 )
Epeak [keV] : 126.404      ( -34.9973 384.59 )
Norm@50keV   : 1.96541E-02    ( -0.0196367   0.0803612 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.13 using 59 PHA bins.
# Reduced chi-squared =          1.021 for     55 degrees of freedom 
# Null hypothesis probability =   4.322569e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.833459 (    ) 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]    : 23.1551  (-4.24511  5.917)
R^2/D10^2   : 2.74972E-02  (-0.0137353   0.0243296)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.61 using 59 PHA bins.
# Reduced chi-squared =          1.011 for     57 degrees of freedom 
# Null hypothesis probability =   4.523135e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.663e-09   9.180e-10
25- 50  1.450e-08   4.597e-09
50-150  5.807e-08   1.895e-08
15-150  7.523e-08   2.307e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 3.43222       (-0.58978     0.589747)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.50 using 59 PHA bins.
# Reduced chi-squared =          1.272 for     57 degrees of freedom 
# Null hypothesis probability =   8.086583e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.546e-09   4.895e-09
25- 50  1.644e-08   9.430e-09
50-150  3.605e-08   2.061e-08
15-150  6.104e-08   3.460e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.03048        (-5.03052      -5.03052)
R1^2/D10^2  : 1.00373        (-1.00371      -1.00371)
kT2 [keV]   : 25.6923        (-5.86976      -25.6923)
R2^2/D10^2  : 1.91495E-02    (-0.0191494   0.0212665)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.88 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     55 degrees of freedom 
# Null hypothesis probability =   4.413957e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.665e-09   2.587e-09
25- 50  1.410e-08   6.515e-09
50-150  6.072e-08   3.457e-08
15-150  7.949e-08   3.544e-08
Plot creation:
Fri Apr 24 08:15:56 EDT 2015