batgrbproduct Analysis for Trigger=435903

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sat Oct  9 20:40:28 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger435903/SDC
======================================================================

  Trigger: 00435903      Segment: 000

  BAT Trigger Time: 308249001.472   [s; MET]
      Trigger Stop: 308249002.496   [s; MET]
               UTC: 2010-10-08T16:43:15.219700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 328.890606987462   Dec: 37.0622663135631  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.7
     Image Trigger?:     NO
     Rate S/N Ratio:     21.1660104885167  [ if not an image trigger ]
     Image S/N Ratio:    10.7

  Flight Position:   [ source = BAT ]
    RA: 328.890606987462   Dec: 37.0622663135631  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 328.882423555896   Dec: 37.0601244966465  [deg; J2000]  
        { 21h 55m 31.8s , +37d 03' 36.4" }
         +/- 2.14952401391138 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.897621340441718 [arcmin] (formal 1-sigma fit error)
    SNR: 10.1939773393227
 
  Angular difference between Flight and Ground position is 0.412355 arcmin
 
  Partial Coding Fraction: 0.5859375    [ including projection effects ]

  Duration
     T90: 104.271999955177 +/- 34.6032657524036
        Measured from: -2.40399998426437
                   to: 101.867999970913     [s; relative to TRIGTIME]
     T50: 40.4759999513626 +/- 22.2792064652318
        Measured from: 0.412000000476837
                   to: 40.8879999518394     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.424000024795532     
                   to: 0.575999975204468     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4     
                   to: 106.620000004768     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.542212   0.588150   0.512838   0.163090
           0.077654   0.077697   0.070182   0.063992 [error]
 Peak      0.043318   0.064443   0.060271   0.036731
           0.007997   0.008753   0.007994   0.007038 [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 1.68e-07 2.92e-07 3.87e-07 1.04e-06 1.13e-06 1.89e-06   erg/cm2
              Error 3.76e-08 3.94e-08 7.02e-08 4.11e-07 1.66e-07 4.65e-07   erg/cm2
Peak flux Power-law 4.19e-01 5.05e-01 4.40e-01 6.57e-01 1.59e+00 2.02e+00   ph/cm2/s
              Error 1.11e-01 7.99e-02 6.54e-02 2.17e-01 2.15e-01 2.75e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.68e-07 2.92e-07 3.87e-07 1.04e-06 1.13e-06 1.75e-06   erg/cm2
              Error 3.76e-08 3.94e-08 7.03e-08 4.08e-07 1.66e-07 6.75e-07   erg/cm2
Peak flux Cutoff-PL 4.18e-01 5.05e-01 4.40e-01 6.52e-01 1.59e+00 2.02e+00   ph/cm2/s
              Error 1.11e-01 7.99e-02 6.55e-02 2.74e-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    1.594    0.240    -      -           1.09e-03 1.48e-04   51.110 57
CPL   2.288    0.000     105.9    0.0      4.64e-04 0.00e+00   51.080 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    1.198    0.240    -      -           1.36e-02 1.76e-03   64.070 57
CPL   2.031    0.000      11.7    0.0      3.61e-03 0.00e+00   62.840 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: 8.064000 sec.
T50 in the 50-300 keV band: 4.544000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  110.620   -4.000  106.620
T90   104.272   -2.404  101.868
T50    40.476    0.412   40.888
Peak    1.000   -0.424    0.576

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  328.8824 +37.0601 0.0189   39.7 -162.7       1.8473    10.2  TRIG_00435903       
------------------------------------------
 
Foreground time interval of the image:
 -4.000 106.620 (delta_t = 110.620 [sec])
Background time interval of the image:
-210.971  -4.000 (delta_t = 206.971 [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   -4.000 sec. to  106.620 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59403     ( -0.236961   0.243501 )
Norm@50keV  : 1.09041E-03    ( -0.000149289   0.000147311 )
------------------------------------------------------------
# Chi-Squared =          51.11 using 59 PHA bins.
# Reduced chi-squared =         0.8966 for     57 degrees of freedom 
# Null hypothesis probability =   6.947343e-01
 
Photon flux (15-150 keV)    in 110.6 sec: 0.139865 ( -0.0186317  0.0186908 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12867e-06 ( -1.65336e-07  1.67309e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -4.000 sec. to  106.620 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.28780     (     )
Epeak [keV] : 105.858      (   )
Norm@50keV  : 4.63661E-04    (     )
------------------------------------------------------------
# Chi-Squared =          51.08 using 59 PHA bins.
# Reduced chi-squared =         0.9121 for     56 degrees of freedom 
# Null hypothesis probability =   6.612949e-01
 
Photon flux (15-150 keV)    in 110.6 sec: 0.139812 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12884e-06 ( -1.6539e-07  1.6736e-07 ) ergs/cm2
 
Band function
Time interval is from   -4.000 sec. to  106.620 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.29705   ( 1.30071   1.30071 )
beta        : -1.58868    ( 1.59126   0.234386 )
Epeak [keV] : 40.2830      ( -37.8657 -37.8657 )
Norm@50keV   : 2.01487E-03    ( -0.00203294   0.112904 )
------------------------------------------------------------
# Chi-Squared =          51.11 using 59 PHA bins.
# Reduced chi-squared =         0.9293 for     55 degrees of freedom 
# Null hypothesis probability =   6.239698e-01
 
Photon flux (15-150 keV)    in 110.6 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   -0.424 sec. to    0.576 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.19811     ( -0.243436   0.237271 )
Norm@50keV  : 1.35828E-02    ( -0.00175796   0.00175546 )
------------------------------------------------------------
# Chi-Squared =          64.07 using 59 PHA bins.
# Reduced chi-squared =          1.124 for     57 degrees of freedom 
# Null hypothesis probability =   2.424261e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.59390 ( -0.214971  0.21584 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37877e-07 ( -1.9588e-08  1.96945e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.424 sec. to    0.576 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.03120     (     )
Epeak [keV] : 11.7197      (   )
Norm@50keV  : 3.61427E-03    (     )
------------------------------------------------------------
# Chi-Squared =          62.84 using 59 PHA bins.
# Reduced chi-squared =          1.122 for     56 degrees of freedom 
# Null hypothesis probability =   2.470401e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.59335 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37899e-07 ( -1.9598e-08  1.9705e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.424 sec. to    0.576 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.957565   ( 0.957565   0.957565 )
beta        : -1.19808    ( 1.19808   0.243778 )
Epeak [keV] : 48.8791      ( -48.8787 -48.8787 )
Norm@50keV   : 2.47174E-02    ( -0.012016   7405.04 )
------------------------------------------------------------
# Chi-Squared =          64.07 using 59 PHA bins.
# Reduced chi-squared =          1.165 for     55 degrees of freedom 
# Null hypothesis probability =   1.882982e-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:
Sat Oct  9 23:07:32 EDT 2010