batgrbproduct Analysis for Trigger=645340

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Mon Jun 22 11:10:36 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/prebascript/trigger645340/GCN5_download_cron
======================================================================

  Trigger: 00645340      Segment: 000

  BAT Trigger Time: 456578952   [s; MET]
      Trigger Stop: 456579016   [s; MET]
               UTC: 2015-06-21T11:28:58.251820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 245.071470122346   Dec: -15.6907688838552  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    17.7
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    17.7

  Flight Position:   [ source = BAT ]
    RA: 245.071470122346   Dec: -15.6907688838552  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 244.987901198274   Dec: -15.637665157875  [deg; J2000]  
        { 16h 19m 57.1s , -15d 38' 15.6" }
         +/- 0.60240583324084 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.177237781993263 [arcmin] (formal 1-sigma fit error)
    SNR: 62.742587478449
 
  Angular difference between Flight and Ground position is 5.784528 arcmin
 
  Partial Coding Fraction: 0.5546875    [ including projection effects ]

  Duration
     T90: 794.155999958515 +/- 15.4459067993292
        Measured from: -147.431999862194
                   to: 646.724000096321     [s; relative to TRIGTIME]
     T50: 466.77999997139 +/- 11.6670647739215
        Measured from: -42.0119999051094
                   to: 424.76800006628     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 18.8600000143051     
                   to: 19.8600000143051     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -179.836000025272     
                   to: 784.175999999046     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    74.760229   6.329105   0.157038   0.041834
           0.232832   0.187392   0.154563   0.131768 [error]
 Peak      0.130269   0.018731   0.013222   0.008482
           0.010007   0.007564   0.006281   0.005156 [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 2.89e-05 2.58e-06 9.10e-08 3.31e-09 3.15e-05 3.15e-05   erg/cm2
              Error 1.94e-06 1.35e-07 1.42e-08 9.17e-10 1.92e-06 1.92e-06   erg/cm2
Peak flux Power-law 1.51e+00 1.85e-01 9.72e-03 5.37e-04 1.71e+00 1.71e+00   ph/cm2/s
              Error 2.40e-01 7.53e-02 9.78e-03 1.09e-03 2.61e-01 2.61e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.56e-05 2.34e-06 4.73e-09 1.89e-14 2.79e-05 2.79e-05   erg/cm2
              Error 2.40e-06 1.50e-07 4.71e-09 3.30e-13 2.40e-06 2.40e-06   erg/cm2
Peak flux Cutoff-PL 1.51e+00 1.80e-01 9.06e-03 4.83e-04 1.70e+00 1.71e+00   ph/cm2/s
              Error 2.40e-01 8.59e-02 1.15e-02 1.09e-03 2.61e-01 2.61e-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    6.827    0.167    -      -           1.20e-04 1.52e-05   92.790 57
CPL   1.000    0.000      50.0    0.0      1.48e-03 0.00e+00 1494.790 56
 
The chi2 of BB fit is 57.91 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    5.248    0.793    -      -           8.72e-04 7.06e-04   39.690 57
CPL   1.000    0.000      50.0    0.0      1.70e-02 0.00e+00  113.380 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  964.012 -179.836  784.176
T90   794.156 -147.432  646.724
T50   466.780  -42.012  424.768
Peak    1.000   18.860   19.860

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  244.9879 -15.6377 0.0031   26.6   42.8      18.6649    62.7  TRIG_00645340       
------------------------------------------
 
Foreground time interval of the image:
-82.599  73.801 (delta_t = 156.400 [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
Multiple GTIs in the spectrum
tstart tstop
-179.836000 118.790000
120.000000 126.130000
128.000000 263.620000
270.000000 270.810000
272.000000 274.310000
275.000000 275.177800
276.000000 277.300000
278.000000 279.135300
280.000000 784.176000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.82709     ( -0.168469   0.166256 )
Norm@50keV  : 1.19657E-04    ( -1.43616e-05   1.59619e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          92.79 using 59 PHA bins.
# Reduced chi-squared =          1.628 for     57 degrees of freedom 
# Null hypothesis probability =   1.923665e-03
 
Photon flux (15-150 keV)    in 950.3 sec: 1.14385 ( -0.0744175  0.0756603 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.15309e-05 ( -1.90745e-06  1.93652e-06 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-179.836000 118.790000
120.000000 126.130000
128.000000 263.620000
270.000000 270.810000
272.000000 274.310000
275.000000 275.177800
276.000000 277.300000
278.000000 279.135300
280.000000 784.176000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.47779E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =        1494.79 using 59 PHA bins.
# Reduced chi-squared =        26.6926 for     56 degrees of freedom 
# Null hypothesis probability =  9.466683e-276
 
Photon flux (15-150 keV)    in 950.3 sec: 0.997176 ( -0.094883  0.093724 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.79279e-05 ( -2.41842e-06  2.38715e-06 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-179.836000 118.790000
120.000000 126.130000
128.000000 263.620000
270.000000 270.810000
272.000000 274.310000
275.000000 275.177800
276.000000 277.300000
278.000000 279.135300
280.000000 784.176000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.286773   ( -2.50269   1.97131 )
beta        : -8.46398    ( 8.45725   0.724683 )
Epeak [keV] : 7.46128      ( -1.99099 2.92851 )
Norm@50keV   : 39.9125    ( -39.8437   48858.2 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.90 using 59 PHA bins.
# Reduced chi-squared =         0.9255 for     55 degrees of freedom 
# Null hypothesis probability =   6.319492e-01
 
Photon flux (15-150 keV)    in 950.3 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]    : 2.67647  (-0.0817205  0.0870487)
R^2/D10^2   : 279.052  (-71.3698   94.1879)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.91 using 59 PHA bins.
# Reduced chi-squared =          1.016 for     57 degrees of freedom 
# Null hypothesis probability =   4.413853e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.354e-05   2.143e-06
25- 50  2.262e-06   1.544e-07
50-150  1.363e-09   3.939e-10
15-150  2.580e-05   2.005e-06
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 4.35779       (-0.18058      0.196537)
Norm        : 396.210       (-85.7804     107.538)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.95 using 59 PHA bins.
# Reduced chi-squared =         0.9289 for     57 degrees of freedom 
# Null hypothesis probability =   6.277246e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.594e-05   2.219e-06
25- 50  2.361e-06   1.520e-07
50-150  5.830e-09   1.556e-09
15-150  2.831e-05   2.048e-06
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.01066        (-3.55464      8.50355)
R1^2/D10^2  : 0.411568        (-0.383949      10.2074)
kT2 [keV]   : 2.48466        (-1.01028      0.182028)
R2^2/D10^2  : 487.887    (-205.796   12053)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.49 using 59 PHA bins.
# Reduced chi-squared =         0.9362 for     55 degrees of freedom 
# Null hypothesis probability =   6.094486e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.528e-05   5.778e-06
25- 50  2.373e-06   8.069e-07
50-150  2.639e-08   1.602e-08
15-150  2.768e-05   7.222e-06

Peak spectrum fit

Power-law model
Time interval is from   18.860 sec. to   19.860 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 5.24846     ( -0.744267   0.841621 )
Norm@50keV  : 8.71713E-04    ( -0.000509938   0.000902448 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.69 using 59 PHA bins.
# Reduced chi-squared =         0.6964 for     57 degrees of freedom 
# Null hypothesis probability =   9.606016e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.70811 ( -0.261327  0.261337 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.36545e-08 ( -8.84154e-09  9.02011e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   18.860 sec. to   19.860 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.70025E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         113.38 using 59 PHA bins.
# Reduced chi-squared =         2.0246 for     56 degrees of freedom 
# Null hypothesis probability =   9.056443e-06
 
Photon flux (15-150 keV)    in 1 sec: 1.70499 ( -0.26024  0.26093 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.35278e-08 ( -8.7509e-09  9.0191e-09 ) ergs/cm2
 
Band function
Time interval is from   18.860 sec. to   19.860 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.67898   ( 9.67898   9.67898 )
beta        : -5.29258    ( -0.805755   0.783141 )
Epeak [keV] : 2.38420      ( -2.3842 -2.3842 )
Norm@50keV   : 0.113239    ( -0.0656326   0.126527 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          39.70 using 59 PHA bins.
# Reduced chi-squared =         0.7219 for     55 degrees of freedom 
# Null hypothesis probability =   9.401276e-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]    : 2.67000  (-0.392269  0.476715)
R^2/D10^2   : 521.389  (-521.418   1167.67)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.28 using 59 PHA bins.
# Reduced chi-squared =         0.7418 for     57 degrees of freedom 
# Null hypothesis probability =   9.271912e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.552e-08   2.473e-08
25- 50  4.334e-09   2.620e-09
50-150  2.554e-12   2.957e-12
15-150  4.986e-08   2.205e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 5.13842       (-1.12772      1.60332)
Norm        : 353.608       (-208.813     576.992)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.99 using 59 PHA bins.
# Reduced chi-squared =         0.7192 for     57 degrees of freedom 
# Null hypothesis probability =   9.456702e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.488e-08   1.715e-08
25- 50  6.029e-09   3.166e-09
50-150  3.581e-11   3.472e-11
15-150  5.094e-08   2.392e-08
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 2.60063        (-0.425769      0.481236)
R1^2/D10^2  : 618.865        (-428.857      2241.88)
kT2 [keV]   : 36.1308        (-29.8366      -35.0816)
R2^2/D10^2  : 1.84048E-03    (-0.00200128   0.092611)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          37.11 using 59 PHA bins.
# Reduced chi-squared =         0.6748 for     55 degrees of freedom 
# Null hypothesis probability =   9.693006e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.534e-08   2.479e-08
25- 50  6.070e-09   2.932e-09
50-150  1.843e-08   1.380e-08
15-150  6.984e-08   3.144e-08
Plot creation:
Mon Jun 22 11:15:35 EDT 2015