batgrbproduct Analysis for Trigger=444230

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Wed Feb  2 00:38:08 EST 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger444230/GCN5_download_cron
======================================================================

  Trigger: 00444230      Segment: 000

  BAT Trigger Time: 318245715.52   [s; MET]
      Trigger Stop: 318245716.544   [s; MET]
               UTC: 2011-02-01T09:35:08.899340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 137.065563354374   Dec: 88.6075583363001  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.8
     Image Trigger?:     NO
     Rate S/N Ratio:     36.2491379207837  [ if not an image trigger ]
     Image S/N Ratio:    9.8

  Flight Position:   [ source = BAT ]
    RA: 137.065563354374   Dec: 88.6075583363001  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 137.458580207521   Dec: 88.610201256129  [deg; J2000]  
        { 09h 09m 50.1s , +88d 36' 36.7" }
         +/- 1.28365324764345 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.646477334683736 [arcmin] (formal 1-sigma fit error)
    SNR: 21.2908529356849
 
  Angular difference between Flight and Ground position is 0.594037 arcmin
 
  Partial Coding Fraction: 0.9765625    [ including projection effects ]

  Duration
     T90: 11.6759999394417 +/- 2.28123211973421
        Measured from: -1.71199983358383
                   to: 9.96400010585785     [s; relative to TRIGTIME]
     T50: 6.17199993133545 +/- 0.749186220368623
        Measured from: 0.828000128269196
                   to: 7.00000005960464     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.283999979496002     
                   to: 0.716000020503998     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.84399998188019     
                   to: 13.2919999957085     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.197488   0.344472   0.346323   0.121005
           0.018517   0.019694   0.018435   0.016113 [error]
 Peak      0.015633   0.046892   0.058132   0.027302
           0.004898   0.005415   0.005398   0.004839 [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 5.60e-08 1.33e-07 2.51e-07 1.15e-06 6.82e-07 1.59e-06   erg/cm2
              Error 6.73e-09 9.36e-09 1.74e-08 1.86e-07 4.51e-08 1.95e-07   erg/cm2
Peak flux Power-law 1.74e-01 2.86e-01 3.56e-01 8.80e-01 1.06e+00 1.70e+00   ph/cm2/s
              Error 4.40e-02 4.43e-02 4.01e-02 2.19e-01 1.20e-01 2.29e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.28e-08 1.35e-07 2.58e-07 8.19e-07 6.72e-07 1.26e-06   erg/cm2
              Error 8.45e-09 1.03e-08 2.01e-08 4.06e-07 4.84e-08 3.81e-07   erg/cm2
Peak flux Cutoff-PL 1.32e-01 2.94e-01 3.96e-01 3.95e-01 1.03e+00 1.22e+00   ph/cm2/s
              Error 5.51e-02 5.01e-02 5.44e-02 3.32e-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 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    1.082    0.108    -      -           4.02e-03 2.38e-04   70.110 57
CPL   0.834    0.384     264.1    0.0      5.20e-03 2.13e-03   69.030 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    0.684    0.196    -      -           9.20e-03 1.09e-03   53.820 57
CPL  -0.263    0.000     143.2  408.7      2.30e-02 2.73e-02   50.400 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: 9.728000 sec.
T50 in the 50-300 keV band: 4.288000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   16.136   -2.844   13.292
T90    11.676   -1.712    9.964
T50     6.172    0.828    7.000
Peak    1.000   -0.284    0.716

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  137.4586 +88.6102 0.0090   10.4  -95.9       1.1311    21.3  TRIG_00444230       
------------------------------------------
 
Foreground time interval of the image:
 -2.844  13.292 (delta_t =  16.136 [sec])
Background time interval of the image:
-13.119  -2.844 (delta_t =  10.275 [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   -2.844 sec. to   13.292 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08241     ( -0.108199   0.106993 )
Norm@50keV  : 4.01584E-03    ( -0.000237989   0.000237835 )
------------------------------------------------------------
# Chi-Squared =          70.11 using 59 PHA bins.
# Reduced chi-squared =          1.230 for     57 degrees of freedom 
# Null hypothesis probability =   1.138782e-01
 
Photon flux (15-150 keV)    in 16.14 sec: 0.465045 ( -0.0282389  0.0282916 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.81513e-07 ( -4.50214e-08  4.5258e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -2.844 sec. to   13.292 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.834192     ( -0.444048   0.324731 )
Epeak [keV] : 264.141      ( -264.137 -264.137 )
Norm@50keV  : 5.20209E-03    ( -0.00134739   0.00291332 )
------------------------------------------------------------
# Chi-Squared =          69.03 using 59 PHA bins.
# Reduced chi-squared =          1.233 for     56 degrees of freedom 
# Null hypothesis probability =   1.133564e-01
 
Photon flux (15-150 keV)    in 16.14 sec: 0.459290 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.71602e-07 ( -4.85523e-08  4.82328e-08 ) ergs/cm2
 
Band function
Time interval is from   -2.844 sec. to   13.292 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.834201   ( 0.889896   0.889896 )
beta        : -9.88512    ( 32.6958   42.6958 )
Epeak [keV] : 264.118      ( -130.604 -264.118 )
Norm@50keV   : 5.20169E-03    ( -0.00245845   0.00344522 )
------------------------------------------------------------
# Chi-Squared =          69.03 using 59 PHA bins.
# Reduced chi-squared =          1.255 for     55 degrees of freedom 
# Null hypothesis probability =   9.666499e-02
 
Photon flux (15-150 keV)    in 16.14 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   -0.284 sec. to    0.716 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.683870     ( -0.201809   0.190692 )
Norm@50keV  : 9.20040E-03    ( -0.00109655   0.00108067 )
------------------------------------------------------------
# Chi-Squared =          53.82 using 59 PHA bins.
# Reduced chi-squared =         0.9442 for     57 degrees of freedom 
# Null hypothesis probability =   5.952219e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.06489 ( -0.120095  0.120413 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.13129e-07 ( -1.33243e-08  1.33996e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.284 sec. to    0.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.262655     (     )
Epeak [keV] : 143.202      ( -47.2789 770.035 )
Norm@50keV  : 2.30336E-02    ( -0.0130374   0.0416055 )
------------------------------------------------------------
# Chi-Squared =          50.40 using 59 PHA bins.
# Reduced chi-squared =         0.9000 for     56 degrees of freedom 
# Null hypothesis probability =   6.859428e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.02870 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.08199e-07 ( -1.48653e-08  1.4573e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.284 sec. to    0.716 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99999   ( -249370   -249370 )
beta        : -1.11993    ( -0.193195   0.204167 )
Epeak [keV] : 53.6040      ( -53.6302 11.5015 )
Norm@50keV   : 7.78153    ( -5.09899   646659 )
------------------------------------------------------------
# Chi-Squared =          51.29 using 59 PHA bins.
# Reduced chi-squared =         0.9325 for     55 degrees of freedom 
# Null hypothesis probability =   6.172012e-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]    :   (  )
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:
Wed Feb  2 01:04:58 EST 2011