batgrbproduct Analysis for Trigger=515277

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Feb 18 16:21:29 EST 2012
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger515277/batgroup_hand_proc
======================================================================

  Trigger: 00515277      Segment: 000

  BAT Trigger Time: 351218970.048   [s; MET]
      Trigger Stop: 351218978.24   [s; MET]
               UTC: 2012-02-18T00:49:22.145800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 319.757959799859   Dec: -25.4504975119872  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.67
     Image Trigger?:     NO
     Rate S/N Ratio:     27.0370116691915  [ if not an image trigger ]
     Image S/N Ratio:    9.67

  Flight Position:   [ source = BAT ]
    RA: 319.757959799859   Dec: -25.4504975119872  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA:    Dec:   [deg; J2000]  
        { 00h 00m 00.0s , +00d 00' 00.0" }
         +/- inf [arcmin] (estimated 90% radius based on SNR)
         +/- 0 [arcmin] (formal 1-sigma fit error)
    SNR: 
 
  Angular difference between Flight and Ground position is 2785.767749 arcmin
 
  Partial Coding Fraction: 0.04638672    [ including projection effects ]

  Duration
     T90: 27.607999920845 +/- 0.909927472709966
        Measured from: -20.2519998550415
                   to: 7.35600006580353     [s; relative to TRIGTIME]
     T50: 14.9639999866486 +/- 2.4543186317695
        Measured from: -11.5919998884201
                   to: 3.37200009822845     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.32800000905991     
                   to: 3.32800000905991     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -20.8560000061989     
                   to: 9.29199999570847     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.203343   2.993718   2.245542   0.595375
           0.167810   0.172343   0.149826   0.114503 [error]
 Peak      0.237355   0.409923   0.327761   0.116099
           0.038786   0.043004   0.041615   0.029551 [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 9.35e-07 1.47e-06 1.74e-06 4.02e-06 5.32e-06 8.17e-06   erg/cm2
              Error 9.86e-08 9.66e-08 1.48e-07 7.11e-07 3.58e-07 8.33e-07   erg/cm2
Peak flux Power-law 3.36e+00 3.06e+00 1.93e+00 1.86e+00 9.13e+00 1.02e+01   ph/cm2/s
              Error 6.57e-01 3.99e-01 2.83e-01 5.15e-01 1.17e+00 1.25e+00   ph/cm2/s
 
Fluence   Cutoff-PL 8.58e-07 1.55e-06 1.81e-06 2.02e-06 6.23e-06 0.00e+00   erg/cm2
              Error 1.19e-07 1.21e-07 1.64e-07 1.28e-06 1.31e-06 0.00e+00   erg/cm2
Peak flux Cutoff-PL 2.90e+00 3.31e+00 2.17e+00 9.03e+00 9.42e+00 0.00e+00   ph/cm2/s
              Error 7.81e-01 4.89e-01 3.80e-01 1.17e+00 1.34e+00 0.00e+00   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 0.00e+00 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    1.754    0.109    -      -           1.91e-02 1.25e-03   42.270 57
CPL   1.240    0.485      73.7   85.6      3.49e-02 2.10e-02   38.560 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.667    0.184    -      -           6.95e-02 8.64e-03   82.040 57
CPL   0.910    0.837      78.6  470.4      1.62e-01 1.87e-01   79.170 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: 33.920000 sec.
T50 in the 50-300 keV band: 21.824000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   30.148  -20.856    9.292
T90    27.608  -20.252    7.356
T50    14.964  -11.592    3.372
Peak    1.000    2.328    3.328

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
 
Foreground time interval of the image:
-20.856   9.292 (delta_t =  30.148 [sec])
Background time interval of the image:
-239.048 -197.738 (delta_t =  41.310 [sec])
-197.048 -20.856 (delta_t = 176.192 [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  -20.856 sec. to    9.292 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.75419     ( -0.108364   0.109883 )
Norm@50keV  : 1.91204E-02    ( -0.00125336   0.00124797 )
------------------------------------------------------------
# Chi-Squared =          42.27 using 59 PHA bins.
# Reduced chi-squared =         0.7417 for     57 degrees of freedom 
# Null hypothesis probability =   9.272844e-01
 
Photon flux (15-150 keV)    in 30.15 sec: 2.58940 ( -0.17265  0.173107 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.31813e-06 ( -3.57305e-07  3.58411e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -20.856 sec. to    9.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23968     ( -0.51292   0.45726 )
Epeak [keV] : 73.6695      ( -16.0738 155.107 )
Norm@50keV  : 3.48722E-02    ( -0.0141771   0.027899 )
------------------------------------------------------------
# Chi-Squared =          38.56 using 59 PHA bins.
# Reduced chi-squared =         0.6886 for     56 degrees of freedom 
# Null hypothesis probability =   9.635773e-01
 
Photon flux (15-150 keV)    in 30.15 sec: 2.52739 ( -0.18087  0.18131 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.23409e-06 ( -9.45715e-07  1.6761e-06 ) ergs/cm2
 
Band function
Time interval is from  -20.856 sec. to    9.292 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.984301   ( -0.607183   4.72972 )
beta        : -2.09571    ( 2.09946   0.313092 )
Epeak [keV] : 59.8401      ( -32.3291 37.0229 )
Norm@50keV   : 4.92737E-02    ( -0.0274227   243.154 )
------------------------------------------------------------
# Chi-Squared =          37.40 using 59 PHA bins.
# Reduced chi-squared =         0.6800 for     55 degrees of freedom 
# Null hypothesis probability =   9.667367e-01
 
Photon flux (15-150 keV)    in 30.15 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]    : 13.4341  (-0.958423  1.03596)
R^2/D10^2   : 0.415188  (-0.100941   0.132087)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          85.92 using 59 PHA bins.
# Reduced chi-squared =          1.507 for     57 degrees of freedom 
# Null hypothesis probability =   7.939239e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.787e-07   5.291e-08
25- 50  1.707e-06   1.358e-07
50-150  1.984e-06   2.649e-07
15-150  4.170e-06   3.090e-07
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 119.697       (-5.81558      59.0102)
Norm        : 10.9934       (-0.92651     1.03488)
------------------------------------------------------------
# Chi-Squared =          38.52 using 59 PHA bins.
# Reduced chi-squared =         0.6758 for     57 degrees of freedom 
# Null hypothesis probability =   9.712298e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  8.634e-07   8.246e-08
25- 50  1.544e-06   1.048e-07
50-150  2.752e-06   3.669e-07
15-150  5.159e-06   4.161e-07
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.10739        (-2.1655      2.73834)
R1^2/D10^2  : 2.69757        (-1.64172      6.75199)
kT2 [keV]   : 22.8447        (-5.46674      19.7053)
R2^2/D10^2  : 4.18930E-02    (-0.0363998   0.08885)
------------------------------------------------------------
# Chi-Squared =          43.09 using 59 PHA bins.
# Reduced chi-squared =         0.7835 for     55 degrees of freedom 
# Null hypothesis probability =   8.779270e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.902e-07   2.299e-07
25- 50  1.593e-06   3.891e-07
50-150  2.691e-06   9.312e-07
15-150  5.075e-06   1.403e-06

Peak spectrum fit

Power-law model
Time interval is from    2.328 sec. to    3.328 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66668     ( -0.180954   0.187614 )
Norm@50keV  : 6.95149E-02    ( -0.00866132   0.00862806 )
------------------------------------------------------------
# Chi-Squared =          82.04 using 59 PHA bins.
# Reduced chi-squared =          1.439 for     57 degrees of freedom 
# Null hypothesis probability =   1.659386e-02
 
Photon flux (15-150 keV)    in 1 sec: 9.12750 ( -1.16782  1.17023 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.45473e-07 ( -8.29136e-08  8.30065e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    2.328 sec. to    3.328 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.909750     ( -0.913721   0.760707 )
Epeak [keV] : 78.6404      ( -20.1473 920.645 )
Norm@50keV  : 0.162001    ( -0.0916047   0.28154 )
------------------------------------------------------------
# Chi-Squared =          79.17 using 59 PHA bins.
# Reduced chi-squared =          1.414 for     56 degrees of freedom 
# Null hypothesis probability =   2.245610e-02
 
Photon flux (15-150 keV)    in 1 sec: 9.02775 ( -1.16849  1.17385 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2
 
Band function
Time interval is from    2.328 sec. to    3.328 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -6.48788E-02   ( -1.39441   4.00036 )
beta        : -2.08435    ( 2.10138   0.436833 )
Epeak [keV] : 53.5631      ( -18.9196 71.243 )
Norm@50keV   : 0.512380    ( -0.509945   385.396 )
------------------------------------------------------------
# Chi-Squared =          78.48 using 59 PHA bins.
# Reduced chi-squared =          1.427 for     55 degrees of freedom 
# Null hypothesis probability =   2.049473e-02
 
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]    : 14.6448  (-1.93192  2.2263)
R^2/D10^2   : 1.18587  (-0.480356   0.781999)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          92.38 using 59 PHA bins.
# Reduced chi-squared =          1.621 for     57 degrees of freedom 
# Null hypothesis probability =   2.098838e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.344e-08   1.099e-08
25- 50  2.077e-07   3.355e-08
50-150  2.998e-07   6.390e-08
15-150  5.609e-07   8.970e-08
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 157.146       (-0.489745      -101.254)
Norm        : 38.2435       (-5.21309     5.94982)
------------------------------------------------------------
# Chi-Squared =          79.74 using 59 PHA bins.
# Reduced chi-squared =          1.399 for     57 degrees of freedom 
# Null hypothesis probability =   2.506192e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.782e-08   1.798e-08
25- 50  1.825e-07   2.595e-08
50-150  3.671e-07   6.055e-08
15-150  6.475e-07   8.615e-08
Double BB
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.53248        (-3.51849      3.48905)
R1^2/D10^2  : 3.86260        (      )
kT2 [keV]   : 30.9645        (-10.5798      81.1101)
R2^2/D10^2  : 4.66586E-02    (-0.0454038   0.22206)
------------------------------------------------------------
# Chi-Squared =          79.55 using 59 PHA bins.
# Chi-Squared =          78.77 using 59 PHA bins.
# Reduced chi-squared =          1.446 for     55 degrees of freedom 
# Reduced chi-squared =          1.432 for     55 degrees of freedom 
# Null hypothesis probability =   1.685045e-02
# Null hypothesis probability =   1.944050e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.758e-08   4.681e-08
25- 50  1.940e-07   1.042e-07
50-150  3.369e-07   1.968e-07
15-150  6.085e-07   3.327e-07
Plot creation:
Sat Feb 18 16:51:25 EST 2012