batgrbproduct Analysis for Trigger=451165

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Tue Apr 12 11:00:36 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger451165/GCN5_download_cron
======================================================================

  Trigger: 00451165      Segment: 000

  BAT Trigger Time: 324243258.688   [s; MET]
      Trigger Stop: 324243259.712   [s; MET]
               UTC: 2011-04-11T19:34:11.842080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 291.436981024355   Dec: 67.7320243410843  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.94
     Image Trigger?:     NO
     Rate S/N Ratio:     12  [ if not an image trigger ]
     Image S/N Ratio:    6.94

  Flight Position:   [ source = BAT ]
    RA: 291.436981024355   Dec: 67.7320243410843  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 291.448605078474   Dec: 67.7043253369584  [deg; J2000]  
        { 19h 25m 47.7s , +67d 42' 15.6" }
         +/- 0.729879615671775 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.250545250454187 [arcmin] (formal 1-sigma fit error)
    SNR: 47.6950994844762
 
  Angular difference between Flight and Ground position is 1.682848 arcmin
 
  Partial Coding Fraction: 0.71875    [ including projection effects ]

  Duration
     T90: 79.3999999761581 +/- 5.30609654362747
        Measured from: -7.59999990463257
                   to: 71.8000000715256     [s; relative to TRIGTIME]
     T50: 51.5439999103546 +/- 2.48366266590847
        Measured from: 4.79600012302399
                   to: 56.3400000333786     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.73199999332428     
                   to: 5.73199999332428     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -16.9120000004768     
                   to: 86.3079999685287     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.406532   2.666500   1.242868   0.176512
           0.063757   0.065775   0.057408   0.049117 [error]
 Peak      0.053586   0.068109   0.040769  -0.000149
           0.006773   0.007184   0.006337   0.005123 [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 8.00e-07 1.06e-06 1.03e-06 1.79e-06 3.48e-06 4.69e-06   erg/cm2
              Error 4.69e-08 3.71e-08 5.75e-08 2.10e-07 1.31e-07 2.59e-07   erg/cm2
Peak flux Power-law 5.11e-01 4.48e-01 2.70e-01 2.45e-01 1.33e+00 1.47e+00   ph/cm2/s
              Error 9.44e-02 5.64e-02 5.02e-02 8.72e-02 1.68e-01 1.90e-01   ph/cm2/s
 
Fluence   Cutoff-PL 7.37e-07 1.11e-06 1.02e-06 7.97e-07 3.30e-06 3.67e-06   erg/cm2
              Error 5.75e-08 4.59e-08 6.28e-08 3.45e-07 1.62e-07 3.89e-07   erg/cm2
Peak flux Cutoff-PL 4.58e-01 5.00e-01 2.75e-01 8.27e-02 1.29e+00 1.32e+00   ph/cm2/s
              Error 1.08e-01 7.58e-02 5.86e-02 1.94e-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 4.64e-01 1.34e+00 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 1.05e-01 1.98e-01 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    2.040    0.070    -      -           3.65e-03 1.45e-04   57.190 57
CPL   1.499    0.314      42.0    8.1      7.08e-03 2.79e-03   47.330 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    1.733    0.216    -      -           9.92e-03 1.43e-03   61.050 57
CPL   0.784    1.005      56.7   64.8      3.35e-02 7.21e-02   57.570 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: 75.200000 sec.
T50 in the 50-300 keV band: 49.536000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  103.220  -16.912   86.308
T90    79.400   -7.600   71.800
T50    51.544    4.796   56.340
Peak    1.000    4.732    5.732

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  291.4486 +67.7043 0.0040   20.6  -88.3       6.1790    47.7  TRIG_00451165       
------------------------------------------
 
Foreground time interval of the image:
-16.912  70.913 (delta_t =  87.825 [sec])
Background time interval of the image:
-239.688 -16.912 (delta_t = 222.776 [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  -16.912 sec. to   86.308 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.03973     ( -0.0699683   0.0709324 )
Norm@50keV  : 3.64985E-03    ( -0.000145349   0.000144433 )
------------------------------------------------------------
# Chi-Squared =          57.19 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     57 degrees of freedom 
# Null hypothesis probability =   4.678411e-01
 
Photon flux (15-150 keV)    in 103.2 sec: 0.557724 ( -0.0207511  0.0208211 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.48204e-06 ( -1.30353e-07  1.30908e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -16.912 sec. to   86.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.49917     ( -0.326155   0.301938 )
Epeak [keV] : 41.9730      ( -9.09342 7.04123 )
Norm@50keV  : 7.07850E-03    ( -0.00215054   0.00343598 )
------------------------------------------------------------
# Chi-Squared =          47.33 using 59 PHA bins.
# Reduced chi-squared =         0.8452 for     56 degrees of freedom 
# Null hypothesis probability =   7.887036e-01
 
Photon flux (15-150 keV)    in 103.2 sec: 0.536010 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.29812e-06 ( -1.61787e-07  1.63087e-07 ) ergs/cm2
 
Band function
Time interval is from  -16.912 sec. to   86.308 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.14597   ( -0.574571   1.22817 )
beta        : -2.32556    ( 2.32597   0.197148 )
Epeak [keV] : 38.1472      ( -8.38579 8.76305 )
Norm@50keV   : 1.18314E-02    ( -0.00672412   0.0773166 )
------------------------------------------------------------
# Chi-Squared =          46.04 using 59 PHA bins.
# Reduced chi-squared =         0.8371 for     55 degrees of freedom 
# Null hypothesis probability =   7.998118e-01
 
Photon flux (15-150 keV)    in 103.2 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    4.732 sec. to    5.732 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.73257     ( -0.210579   0.220537 )
Norm@50keV  : 9.92226E-03    ( -0.00144115   0.00141379 )
------------------------------------------------------------
# Chi-Squared =          61.05 using 59 PHA bins.
# Reduced chi-squared =          1.071 for     57 degrees of freedom 
# Null hypothesis probability =   3.324980e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.33314 ( -0.167509  0.167539 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.1654e-08 ( -1.36733e-08  1.39657e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    4.732 sec. to    5.732 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.783931     ( -1.13201   0.87742 )
Epeak [keV] : 56.7156      ( -13.772 115.871 )
Norm@50keV  : 3.34733E-02    ( -0.0334726   0.110749 )
------------------------------------------------------------
# Chi-Squared =          57.57 using 59 PHA bins.
# Reduced chi-squared =          1.028 for     56 degrees of freedom 
# Null hypothesis probability =   4.167957e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.29386 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.44541e-08 ( -1.45796e-08  1.53429e-08 ) ergs/cm2
 
Band function
Time interval is from    4.732 sec. to    5.732 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.783851   ( -0.513349   1.54954 )
beta        : -10.00000    ( 4.06012e+11   4.06012e+11 )
Epeak [keV] : 56.7040      ( -13.7696 115.878 )
Norm@50keV   : 3.34760E-02    ( -0.033476   0.110868 )
------------------------------------------------------------
# Chi-Squared =          57.57 using 59 PHA bins.
# Reduced chi-squared =          1.047 for     55 degrees of freedom 
# Null hypothesis probability =   3.802167e-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:
Tue Apr 12 11:22:08 EDT 2011