batgrbproduct Analysis for Trigger=437408

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Oct 30 21:10:22 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger437408/GCN5_download_cron
======================================================================

  Trigger: 00437408      Segment: 000

  BAT Trigger Time: 310146996.224   [s; MET]
      Trigger Stop: 310146997.248   [s; MET]
               UTC: 2010-10-30T15:56:29.902620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 166.389847725746   Dec: -16.3867038690091  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.77
     Image Trigger?:     NO
     Rate S/N Ratio:     14.4913767461894  [ if not an image trigger ]
     Image S/N Ratio:    7.77

  Flight Position:   [ source = BAT ]
    RA: 166.389847725746   Dec: -16.3867038690091  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 166.389652046567   Dec: -16.3892229790771  [deg; J2000]  
        { 11h 05m 33.5s , -16d 23' 21.2" }
         +/- 1.05720998317195 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.504222697598916 [arcmin] (formal 1-sigma fit error)
    SNR: 28.0932704890344
 
  Angular difference between Flight and Ground position is 0.151566 arcmin
 
  Partial Coding Fraction: 0.9609375    [ including projection effects ]

  Duration
     T90: 101.667999923229 +/- 7.30447018128384
        Measured from: -66.9799998402596
                   to: 34.6880000829697     [s; relative to TRIGTIME]
     T50: 66.227999985218 +/- 1.88679620897342
        Measured from: -56.3759998679161
                   to: 9.85200011730194     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.156000018119812     
                   to: 1.15600001811981     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -73.5119999647141     
                   to: 47.5400000214577     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.761661   1.958150   1.252787   0.267758
           0.062743   0.064824   0.057376   0.050141 [error]
 Peak      0.042990   0.049002   0.039707  -0.003413
           0.005784   0.006167   0.005569   0.004664 [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 4.89e-07 7.88e-07 9.61e-07 2.30e-06 2.89e-06 4.54e-06   erg/cm2
              Error 3.64e-08 3.34e-08 5.81e-08 3.08e-07 1.32e-07 3.48e-07   erg/cm2
Peak flux Power-law 3.96e-01 3.58e-01 2.24e-01 2.13e-01 1.07e+00 1.19e+00   ph/cm2/s
              Error 7.21e-02 4.52e-02 4.39e-02 8.00e-02 1.35e-01 1.60e-01   ph/cm2/s
 
Fluence   Cutoff-PL 4.89e-07 7.89e-07 9.61e-07 2.28e-06 2.89e-06 4.52e-06   erg/cm2
              Error 3.64e-08 3.34e-08 5.82e-08 3.06e-07 1.33e-07 3.46e-07   erg/cm2
Peak flux Cutoff-PL 3.71e-01 3.87e-01 2.29e-01 9.98e-02 1.05e+00 1.09e+00   ph/cm2/s
              Error 8.06e-02 5.89e-02 4.86e-02 1.76e-01 0.00e+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 3.69e-01 3.86e-01 1.08e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 7.33e-02 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    1.715    0.083    -      -           2.58e-03 1.12e-04   45.060 57
CPL   1.700    0.283     997.0    0.0      2.62e-03 0.00e+00   45.110 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    1.679    0.222    -      -           8.09e-03 1.21e-03   34.800 57
CPL   1.074    0.835      68.2  -22.6      1.76e-02 2.89e-02   33.060 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: 100.288000 sec.
T50 in the 50-300 keV band: 67.264000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  121.052  -73.512   47.540
T90   101.668  -66.980   34.688
T50    66.228  -56.376    9.852
Peak    1.000    0.156    1.156

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  166.3897 -16.3892 0.0068   12.9  -56.7       1.9106    28.1  TRIG_00437408       
------------------------------------------
 
Foreground time interval of the image:
-32.023  10.877 (delta_t =  42.900 [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
Time interval is from  -73.512 sec. to   47.540 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.71452     ( -0.0822451   0.0830852 )
Norm@50keV  : 2.58438E-03    ( -0.000112442   0.000111496 )
------------------------------------------------------------
# Chi-Squared =          45.06 using 59 PHA bins.
# Reduced chi-squared =         0.7905 for     57 degrees of freedom 
# Null hypothesis probability =   8.736480e-01
 
Photon flux (15-150 keV)    in 121.1 sec: 0.344995 ( -0.0147552  0.0148141 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.89453e-06 ( -1.32083e-07  1.329e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -73.512 sec. to   47.540 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.70035     ( -0.260719   0.304561 )
Epeak [keV] : 997.018      (   )
Norm@50keV  : 2.62207E-03    (     )
------------------------------------------------------------
# Chi-Squared =          45.11 using 59 PHA bins.
# Reduced chi-squared =         0.8055 for     56 degrees of freedom 
# Null hypothesis probability =   8.509655e-01
 
Photon flux (15-150 keV)    in 121.1 sec: 0.344817 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.89446e-06 ( -1.32096e-07  1.32931e-07 ) ergs/cm2
 
Band function
Time interval is from  -73.512 sec. to   47.540 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.37744   ( 1.37748   1.37748 )
beta        : -1.71445    ( -0.0834771   0.0821857 )
Epeak [keV] : 25.6785      ( -25.657 -25.657 )
Norm@50keV   : 5.57307E-03    ( -0.00557384   0.653666 )
------------------------------------------------------------
# Chi-Squared =          45.06 using 59 PHA bins.
# Reduced chi-squared =         0.8193 for     55 degrees of freedom 
# Null hypothesis probability =   8.281788e-01
 
Photon flux (15-150 keV)    in 121.1 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]    :   (  )
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    0.156 sec. to    1.156 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.67948     ( -0.215994   0.228239 )
Norm@50keV  : 8.09229E-03    ( -0.0012291   0.00119574 )
------------------------------------------------------------
# Chi-Squared =          34.80 using 59 PHA bins.
# Reduced chi-squared =         0.6105 for     57 degrees of freedom 
# Null hypothesis probability =   9.910894e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.06716 ( -0.13479  0.134799 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.50525e-08 ( -1.18914e-08  1.22061e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.156 sec. to    1.156 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07412     ( -0.934744   0.73554 )
Epeak [keV] : 68.2128      ( -22.9565 -68.2077 )
Norm@50keV  : 1.76277E-02    ( -0.01763   0.0400836 )
------------------------------------------------------------
# Chi-Squared =          33.06 using 59 PHA bins.
# Reduced chi-squared =         0.5903 for     56 degrees of freedom 
# Null hypothesis probability =   9.937687e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.04975 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.11092e-08 ( -1.25742e-08  1.31566e-08 ) ergs/cm2
 
Band function
Time interval is from    0.156 sec. to    1.156 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.84729   ( 1.35635   1.30112 )
beta        : 10.00000    ( -1.97895e+15   -1.97895e+15 )
Epeak [keV] : 1.72309      ( -1.72309 -1.72309 )
Norm@50keV   : 4.64112E-19    ( -7.06858e-20   7.06858e-20 )
------------------------------------------------------------
# Chi-Squared =          88.02 using 59 PHA bins.
# Reduced chi-squared =          1.600 for     55 degrees of freedom 
# Null hypothesis probability =   3.108956e-03
 
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]    :   (  )
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:
Sat Oct 30 21:29:02 EDT 2010