batgrbproduct Analysis for Trigger=377487

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Wed Dec 23 00:33:45 EST 2009
             Host Name: heteswift
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/377487
======================================================================

  Trigger: 00377487      Segment: 000

  BAT Trigger Time: 281296750.08   [s; MET]
      Trigger Stop: 281296751.104   [s; MET]
               UTC: 2009-11-30T17:59:04.773120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 203.098397836289   Dec: 34.0753830112892  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.78
     Image Trigger?:     NO
     Rate S/N Ratio:     14.2828568570857  [ if not an image trigger ]
     Image S/N Ratio:    7.78

  Flight Position:   [ source = BAT ]
    RA: 203.098397836289   Dec: 34.0753830112892  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 203.147291778021   Dec: 34.08692778743  [deg; J2000]  
        { 13h 32m 35.4s , +34d 05' 12.9" }
         +/- 1.31683350674608 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.559225521563301 [arcmin] (formal 1-sigma fit error)
    SNR: 20.5286313723636
 
  Angular difference between Flight and Ground position is 2.526577 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 130.911999940872 +/- 24.0315634280469
        Measured from: -21.7799999713898
                   to: 109.131999969482     [s; relative to TRIGTIME]
     T50: 31.8879998922348 +/- 6.30764996930951
        Measured from: 1.49200004339218
                   to: 33.379999935627     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.0640000104904175     
                   to: 1.06400001049042     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -28.6559999585152     
                   to: 127.388000011444     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.082411   1.110622   0.576647   0.153630
           0.067421   0.069829   0.061550   0.054287 [error]
 Peak      0.036886   0.048177   0.036122   0.015742
           0.006441   0.006848   0.006061   0.005043 [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 3.60e-07 4.58e-07 4.27e-07 6.98e-07 1.48e-06 1.94e-06   erg/cm2
              Error 3.73e-08 3.41e-08 5.72e-08 1.83e-07 1.31e-07 2.48e-07   erg/cm2
Peak flux Power-law 2.91e-01 3.46e-01 2.98e-01 4.37e-01 1.09e+00 1.37e+00   ph/cm2/s
              Error 8.30e-02 5.85e-02 4.88e-02 1.60e-01 1.58e-01 2.02e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.44e-07 4.89e-07 4.08e-07 2.55e-07 1.39e-06 1.50e-06   erg/cm2
              Error 4.07e-08 4.51e-08 6.71e-08 2.77e-07 1.51e-07 3.23e-07   erg/cm2
Peak flux Cutoff-PL 2.92e-01 3.47e-01 2.97e-01 4.31e-01 1.09e+00 1.36e+00   ph/cm2/s
              Error 8.63e-02 5.70e-02 4.88e-02 1.59e-01 1.57e-01 1.61e-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 2.85e-01 3.45e-01 2.99e-01 4.41e-01 1.09e+00 1.38e+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    2.103    0.144    -      -           1.02e-03 9.89e-05   59.120 57
CPL   1.533    0.558      33.0    0.0      2.21e-03 0.00e+00   55.850 56
 
The chi2 of BB fit is  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    1.217    0.264    -      -           9.26e-03 1.29e-03   68.450 57
CPL   2.930    0.261     267.0    0.0      1.02e-03 0.00e+00   66.790 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: 23.360000 sec.
T50 in the 50-300 keV band: 7.424000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  156.044  -28.656  127.388
T90   130.912  -21.780  109.132
T50    31.888    1.492   33.380
Peak    1.000    0.064    1.064

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  203.1473 +34.0869 0.0094   28.7    7.4       1.6696    20.5  TRIG_00377487       
------------------------------------------
 
Foreground time interval of the image:
-28.656  18.221 (delta_t =  46.877 [sec])
Background time interval of the image:
-339.379 -28.656 (delta_t = 310.723 [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  -28.656 sec. to  127.388 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.10342     ( -0.141098   0.146949 )
Norm@50keV  : 1.02104E-03    ( -9.9673e-05   9.81447e-05 )
------------------------------------------------------------
# Chi-Squared =          59.12 using 59 PHA bins.
# Reduced chi-squared =          1.037 for     57 degrees of freedom 
# Null hypothesis probability =   3.978576e-01
 
Photon flux (15-150 keV)    in 156 sec: 0.160907 ( -0.011858  0.0118619 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.48038e-06 ( -1.2955e-07  1.3172e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -28.656 sec. to  127.388 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.53349     ( -0.633392   0.482364 )
Epeak [keV] : 32.9700      (   )
Norm@50keV  : 2.21138E-03    (     )
------------------------------------------------------------
# Chi-Squared =          55.85 using 59 PHA bins.
# Reduced chi-squared =         0.9973 for     56 degrees of freedom 
# Null hypothesis probability =   4.804608e-01
 
Photon flux (15-150 keV)    in 156 sec: 0.157116 ( -0.012326  0.012341 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.39172e-06 ( -1.47715e-07  1.53769e-07 ) ergs/cm2
 
Band function
Time interval is from  -28.656 sec. to  127.388 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.53350   ( -0.331096   0.615949 )
beta        : -10.00000    ( 7.87167e+11   7.87167e+11 )
Epeak [keV] : 32.9628      ( -30.9692 12.5666 )
Norm@50keV   : 2.21099E-03    ( -0.00107705   0.00302115 )
------------------------------------------------------------
# Chi-Squared =          55.85 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     55 degrees of freedom 
# Null hypothesis probability =   4.426392e-01
 
Photon flux (15-150 keV)    in 156 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]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     

Peak spectrum fit

Power-law model
Time interval is from    0.064 sec. to    1.064 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.21691     ( -0.269142   0.258625 )
Norm@50keV  : 9.25641E-03    ( -0.00128899   0.0012889 )
------------------------------------------------------------
# Chi-Squared =          68.45 using 59 PHA bins.
# Reduced chi-squared =          1.201 for     57 degrees of freedom 
# Null hypothesis probability =   1.424085e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.08917 ( -0.157759  0.158176 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.34673e-08 ( -1.44878e-08  1.46006e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.064 sec. to    1.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.93048     ( -0.276124   0.24502 )
Epeak [keV] : 267.042      ( -9999.77 -9999.77 )
Norm@50keV  : 1.01755E-03    (     )
------------------------------------------------------------
# Chi-Squared =          66.79 using 59 PHA bins.
# Reduced chi-squared =          1.193 for     56 degrees of freedom 
# Null hypothesis probability =   1.532825e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.09020 ( -0.157554  0.15664 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.33007e-08 ( -1.36194e-08  1.47133e-08 ) ergs/cm2
 
Band function
Time interval is from    0.064 sec. to    1.064 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97210   ( -70.4504   -70.4504 )
beta        : -1.24608    ( -0.281479   0.280809 )
Epeak [keV] : 21.6711      ( -21.6711 8.59727 )
Norm@50keV   : 1725.26    ( -1725.89   285719 )
------------------------------------------------------------
# Chi-Squared =          68.06 using 59 PHA bins.
# Reduced chi-squared =          1.237 for     55 degrees of freedom 
# Null hypothesis probability =   1.111065e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.08896 ( -0.153299  0.15193 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.29577e-08 ( -6.7294e-09  1.43383e-08 ) ergs/cm2
 
Single BB
 
 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    :   (  )
R^2/D10^2   :   (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Thermal bremsstrahlung (OTTB)
 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    :        (      )
Norm        :        (     )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Double BB
 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   :         (      )
R1^2/D10^2  :         (      )
kT2 [keV]   :         (      )
R2^2/D10^2  :     (   )
------------------------------------------------------------
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25     
25- 50     
50-150     
15-150     
Plot creation:
Fri May 27 10:45:51 EDT 2011