batgrbproduct Analysis for Trigger=575887

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Oct 26 15:26:59 EDT 2013
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger575887/GCN5_download_cron
======================================================================

  Trigger: 00575887      Segment: 000

  BAT Trigger Time: 404441776   [s; MET]
      Trigger Stop: 404441840   [s; MET]
               UTC: 2013-10-26T00:56:04.804840    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 244.936151936891   Dec: -15.6963837179423  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    20.55
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    20.55

  Flight Position:   [ source = BAT ]
    RA: 244.936151936891   Dec: -15.6963837179423  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 244.975922658009   Dec: -15.6404093912196  [deg; J2000]  
        { 16h 19m 54.2s , -15d 38' 25.5" }
         +/- 0.58370425658642 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.120387313139811 [arcmin] (formal 1-sigma fit error)
    SNR: 65.6339556833223
 
  Angular difference between Flight and Ground position is 4.069163 arcmin
 
  Partial Coding Fraction: 0.796875    [ including projection effects ]

  Duration
     T90: 376.327999949455 +/- 9.47179223427763
        Measured from: -91.2879998683929
                   to: 285.040000081062     [s; relative to TRIGTIME]
     T50: 217.263999938965 +/- 6.94425256287691
        Measured from: -16.6119998693466
                   to: 200.652000069618     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -68.2319999933243     
                   to: -67.2319999933243     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -120.079999983311     
                   to: 307.660000026226     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    23.802741   2.056382   0.068759  -0.229794
           0.153578   0.131321   0.113433   0.106292 [error]
 Peak      0.078561   0.017684   0.006875   0.001363
           0.007114   0.005860   0.005131   0.004780 [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 8.64e-06 8.99e-07 3.85e-08 1.71e-09 9.58e-06 9.58e-06   erg/cm2
              Error 6.62e-07 7.52e-08 8.87e-09 6.85e-10 6.51e-07 6.51e-07   erg/cm2
Peak flux Power-law 8.33e-01 1.45e-01 1.21e-02 1.08e-03 9.91e-01 9.91e-01   ph/cm2/s
              Error 1.53e-01 6.24e-02 1.26e-02 2.32e-03 1.75e-01 1.75e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.04e-06 7.04e-07 5.40e-10 9.83e-17 8.74e-06 8.74e-06   erg/cm2
              Error 7.99e-07 8.77e-08 1.20e-09 1.83e-14 8.04e-07 8.04e-07   erg/cm2
Peak flux Cutoff-PL 8.35e-01 1.42e-01 1.14e-02 9.91e-04 9.88e-01 9.88e-01   ph/cm2/s
              Error 1.52e-01 6.26e-02 1.45e-02 1.80e-03 1.74e-01 1.76e-01   ph/cm2/s
 
Fluence        Band 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 6.41e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    6.547    0.227    -      -           1.09e-04 2.05e-05   86.870 57
CPL   1.000    0.000      50.0    0.0      1.75e-03 0.00e+00  871.880 56
 
The chi2 of BB fit is 60.27 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    4.590    0.846    -      -           9.44e-04 7.80e-04   46.320 57
CPL   1.000    0.000      50.0    0.0      1.26e-02 0.00e+00   95.330 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  427.740 -120.080  307.660
T90   376.328  -91.288  285.040
T50   217.264  -16.612  200.652
Peak    1.000  -68.232  -67.232

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  244.9759 -15.6404 0.0029   26.7  -37.1      22.2646    65.6  TRIG_00575887       
------------------------------------------
 
Foreground time interval of the image:
-18.799 165.030 (delta_t = 183.829 [sec])
166.000 220.820 (delta_t =  54.820 [sec])
222.000 307.660 (delta_t =  85.660 [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
-120.080000 -114.150000
-113.000000 -112.993700
-112.000000 -107.320000
-106.000000 -99.220000
-98.000000 -95.320000
-94.000000 -92.680000
-92.000000 165.030000
166.000000 220.820000
222.000000 307.660000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.54651     ( -0.22839   0.226268 )
Norm@50keV  : 1.08869E-04    ( -1.88678e-05   2.208e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          86.87 using 59 PHA bins.
# Reduced chi-squared =          1.524 for     57 degrees of freedom 
# Null hypothesis probability =   6.582682e-03
 
Photon flux (15-150 keV)    in 418.9 sec: 0.779890 ( -0.0573509  0.0581007 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.57685e-06 ( -6.46828e-07  6.54439e-07 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-120.080000 -114.150000
-113.000000 -112.993700
-112.000000 -107.320000
-106.000000 -99.220000
-98.000000 -95.320000
-94.000000 -92.680000
-92.000000 165.030000
166.000000 220.820000
222.000000 307.660000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.75097E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         871.88 using 59 PHA bins.
# Reduced chi-squared =         15.569 for     56 degrees of freedom 
# Null hypothesis probability =  8.485894e-147
 
Photon flux (15-150 keV)    in 418.9 sec: 0.706309 ( -0.072553  0.07075 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.74228e-06 ( -8.14635e-07  7.93816e-07 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-120.080000 -114.150000
-113.000000 -112.993700
-112.000000 -107.320000
-106.000000 -99.220000
-98.000000 -95.320000
-94.000000 -92.680000
-92.000000 165.030000
166.000000 220.820000
222.000000 307.660000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.749643   ( -2.20078   3.92396 )
beta        : -9.36831    ( 9.37153   1.64678 )
Epeak [keV] : 8.39323      ( -2.12941 2.16721 )
Norm@50keV   : 67.9560    ( -69.3371   59292.7 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.40 using 59 PHA bins.
# Reduced chi-squared =          1.080 for     55 degrees of freedom 
# Null hypothesis probability =   3.183430e-01
 
Photon flux (15-150 keV)    in 418.9 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]    : 2.60910  (-0.102937  0.111327)
R^2/D10^2   : 253.830  (-78.3157   110.612)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.27 using 59 PHA bins.
# Reduced chi-squared =          1.057 for     57 degrees of freedom 
# Null hypothesis probability =   3.584686e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.911e-06   7.771e-07
25- 50  6.890e-07   7.708e-08
50-150  3.278e-10   1.348e-10
15-150  8.600e-06   8.336e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 4.34161       (-0.240615      0.26888)
Norm        : 292.955       (-77.7302     103.833)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.86 using 59 PHA bins.
# Reduced chi-squared =          1.085 for     57 degrees of freedom 
# Null hypothesis probability =   3.067554e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.330e-06   8.273e-07
25- 50  7.512e-07   7.771e-08
50-150  1.815e-09   7.084e-10
15-150  9.083e-06   7.917e-07
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 11.3449        (      )
R1^2/D10^2  : 2.73604E-03        (-0.00247079      0.0993518)
kT2 [keV]   : 2.56199        (-0.109312      0.123788)
R2^2/D10^2  : 292.046    (-97.6862   40.7689)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.11 using 59 PHA bins.
#Fit statistic : Chi-Squared =          58.11 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     55 degrees of freedom 
# Reduced chi-squared =          1.056 for     55 degrees of freedom 
# Null hypothesis probability =   2.958404e-01
# Null hypothesis probability =   3.616114e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.995e-06   2.176e-05
25- 50  7.043e-07   5.670e-06
50-150  7.047e-10   2.723e-08
15-150  8.700e-06   2.040e-05

Peak spectrum fit

Power-law model
Time interval is from  -68.232 sec. to  -67.232 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 4.59050     ( -0.771902   0.921018 )
Norm@50keV  : 9.43936E-04    ( -0.000579962   0.000980162 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.32 using 59 PHA bins.
# Reduced chi-squared =         0.8127 for     57 degrees of freedom 
# Null hypothesis probability =   8.429843e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.990930 ( -0.175146  0.175268 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.29284e-08 ( -6.64358e-09  7.0356e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -68.232 sec. to  -67.232 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     (     )
Epeak [keV] : 50.0000      (   )
Norm@50keV  : 1.25584E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          95.33 using 59 PHA bins.
# Reduced chi-squared =          1.702 for     56 degrees of freedom 
# Null hypothesis probability =   8.214603e-04
 
Photon flux (15-150 keV)    in 1 sec: 0.987953 ( -0.173266  0.175507 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.25953e-08 ( -6.3766e-09  7.1128e-09 ) ergs/cm2
 
Band function
Time interval is from  -68.232 sec. to  -67.232 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.25408   ( 9.25408   9.25408 )
beta        : -4.59073    ( -0.921159   0.772406 )
Epeak [keV] : 247.172      ( -247.172 -247.172 )
Norm@50keV   : 0.128266    ( -0.0788208   0.133215 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.32 using 59 PHA bins.
# Reduced chi-squared =         0.8422 for     55 degrees of freedom 
# Null hypothesis probability =   7.912788e-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]    : 3.05554  (-0.601272  0.768118)
R^2/D10^2   : 120.021  (-120.566   409.245)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.76 using 59 PHA bins.
# Reduced chi-squared =         0.8905 for     57 degrees of freedom 
# Null hypothesis probability =   7.068867e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.512e-08   1.395e-08
25- 50  3.902e-09   2.326e-09
50-150  7.285e-12   7.805e-12
15-150  2.903e-08   1.630e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 6.56965       (-1.89672      3.00008)
Norm        : 92.7217       (-57.1536     186.433)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.38 using 59 PHA bins.
# Reduced chi-squared =         0.8488 for     57 degrees of freedom 
# Null hypothesis probability =   7.848924e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.482e-08   1.075e-08
25- 50  5.492e-09   3.093e-09
50-150  9.568e-11   9.516e-11
15-150  3.040e-08   1.405e-08
Double BB
R1^2/D10^2  : 3831.05        (      )
kT2 [keV]   : 5.04045        (-4.12198      29.3796)
R2^2/D10^2  : 4.56303    (-4.28295   62.8256)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.03 using 59 PHA bins.
#Fit statistic : Chi-Squared =          46.15 using 59 PHA bins.
#Fit statistic : Chi-Squared =          46.14 using 59 PHA bins.
# Reduced chi-squared =         0.8550 for     55 degrees of freedom 
# Reduced chi-squared =         0.8391 for     55 degrees of freedom 
# Reduced chi-squared =         0.8388 for     55 degrees of freedom 
# Null hypothesis probability =   7.691791e-01
# Null hypothesis probability =   7.965895e-01
# Null hypothesis probability =   7.969757e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.473e-08   1.367e-08
25- 50  7.099e-09   3.894e-09
50-150  4.286e-09   3.206e-09
15-150  3.611e-08   1.815e-08
Plot creation:
Sat Oct 26 15:46:14 EDT 2013