batgrbproduct Analysis for Trigger=348128

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Mon Aug 10 16:39:24 EDT 2009
             Host Name: gcn14
   Current Working Dir: /net/raid16/BAT_GRB_process_2009/348128
======================================================================

  Trigger: 00348128      Segment: 000

  BAT Trigger Time: 260236864   [s; MET]
      Trigger Stop: 260236928   [s; MET]
               UTC: 2009-04-01T00:00:59.378700    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 350.908652961353   Dec: 29.7666028590948  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.41
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.41

  Flight Position:   [ source = BAT ]
    RA: 350.908652961353   Dec: 29.7666028590948  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 350.920731352954   Dec: 29.7630869224082  [deg; J2000]  
        { 23h 23m 41.0s , +29d 45' 47.1" }
         +/- 0.676073089070937 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.210424125853902 [arcmin] (formal 1-sigma fit error)
    SNR: 53.208938536644
 
  Angular difference between Flight and Ground position is 0.663522 arcmin
 
  Partial Coding Fraction: 0.3828125    [ including projection effects ]

  Duration
     T90: 117.004000008106 +/- 14.042885742226
        Measured from: 13.6719999909401
                   to: 130.675999999046     [s; relative to TRIGTIME]
     T50: 25.2199999988079 +/- 0.712179771404839
        Measured from: 97.3720000088215
                   to: 122.592000007629     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 122.048000007868     
                   to: 123.048000007868     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -11.9480000138283     
                   to: 165.00799998641     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     4.914235   6.419821   4.985251   1.150727
           0.114302   0.120608   0.107088   0.087701 [error]
 Peak      0.290805   0.468003   0.402817   0.154919
           0.013659   0.016183   0.015599   0.011613 [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 1.72e-06 2.93e-06 3.79e-06 9.90e-06 1.12e-05 1.83e-05   erg/cm2
              Error 8.58e-08 8.29e-08 1.15e-07 6.96e-07 2.80e-07 7.51e-07   erg/cm2
Peak flux Power-law 3.15e+00 3.55e+00 2.87e+00 3.86e+00 1.10e+01 1.34e+01   ph/cm2/s
              Error 1.96e-01 1.36e-01 1.26e-01 3.49e-01 3.91e-01 5.07e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.68e-06 2.95e-06 3.83e-06 8.58e-06 1.11e-05 1.70e-05   erg/cm2
              Error 1.13e-07 8.73e-08 1.27e-07 1.79e-06 3.08e-07 1.82e-06   erg/cm2
Peak flux Cutoff-PL 3.14e+00 3.55e+00 2.87e+00 3.84e+00 1.10e+01 1.34e+01   ph/cm2/s
              Error 1.94e-01 1.36e-01 1.26e-01 3.44e-01 3.89e-01 5.04e-01   ph/cm2/s
 
Fluence        Band 1.65e-06 2.94e-06 3.78e-06 9.78e-06 1.11e-05 1.81e-05   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 3.14e+00 3.55e+00 2.87e+00 3.87e+00 1.10e+01 1.34e+01   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    1.628    0.047    -      -           6.76e-03 1.64e-04   45.670 57
CPL   1.518    0.157     243.0    0.0      7.59e-03 0.00e+00   44.580 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    1.307    0.060    -      -           9.19e-02 3.29e-03   66.240 57
CPL   1.304    0.100    9969.5    0.0      9.23e-02 8.30e-03   66.300 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: 32.768000 sec.
T50 in the 50-300 keV band: 19.840000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  176.956  -11.948  165.008
T90   117.004   13.672  130.676
T50    25.220   97.372  122.592
Peak    1.000  122.048  123.048

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  350.9207 +29.7631 0.0036   36.4 -124.8      18.0224    53.2  TRIG_00348128       
------------------------------------------
 
Foreground time interval of the image:
 -4.899 165.008 (delta_t = 169.907 [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  -11.948 sec. to  165.008 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.62817     ( -0.0473853   0.0474746 )
Norm@50keV  : 6.76419E-03    ( -0.000164183   0.000164167 )
------------------------------------------------------------
# Chi-Squared =          45.67 using 59 PHA bins.
# Reduced chi-squared =         0.8013 for     57 degrees of freedom 
# Null hypothesis probability =   8.592808e-01
 
Photon flux (15-150 keV)    in 177 sec: 0.876987 ( -0.0245321  0.0246358 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.11605e-05 ( -2.79566e-07  2.79796e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -11.948 sec. to  165.008 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.51795     ( -0.186232   0.127783 )
Epeak [keV] : 242.972      (   )
Norm@50keV  : 7.58533E-03    (     )
------------------------------------------------------------
# Chi-Squared =          44.58 using 59 PHA bins.
# Reduced chi-squared =         0.7961 for     56 degrees of freedom 
# Null hypothesis probability =   8.639087e-01
 
Photon flux (15-150 keV)    in 177 sec: 0.868423 ( -0.027847  0.027167 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.1083e-05 ( -3.10369e-07  3.06546e-07 ) ergs/cm2
 
Band function
Time interval is from  -11.948 sec. to  165.008 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.795730   ( 1.1298   1.1298 )
beta        : -1.64159    ( -0.0615868   0.0546747 )
Epeak [keV] : 39.3173      ( -39.2783 362.695 )
Norm@50keV   : 2.61336E-02    ( -0.026298   840332 )
------------------------------------------------------------
# Chi-Squared =          44.90 using 59 PHA bins.
# Reduced chi-squared =         0.8164 for     55 degrees of freedom 
# Null hypothesis probability =   8.325003e-01
 
Photon flux (15-150 keV)    in 177 sec: 0.867067 ( -0.033072  0.026383 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.10678e-05 ( -3.06033e-07  3.10033e-07 ) 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  122.048 sec. to  123.048 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30748     ( -0.0602623   0.060301 )
Norm@50keV  : 9.19479E-02    ( -0.00329634   0.00328988 )
------------------------------------------------------------
# Chi-Squared =          66.24 using 59 PHA bins.
# Reduced chi-squared =          1.162 for     57 degrees of freedom 
# Null hypothesis probability =   1.883318e-01
 
Photon flux (15-150 keV)    in 1 sec: 10.9849 ( -0.390968  0.391036 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.06969e-07 ( -3.70231e-08  3.71986e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  122.048 sec. to  123.048 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30392     ( -0.103542   0.0970281 )
Epeak [keV] : 9969.51      (   )
Norm@50keV  : 9.23357E-02    ( -0.00331289   0.0132854 )
------------------------------------------------------------
# Chi-Squared =          66.30 using 59 PHA bins.
# Reduced chi-squared =          1.184 for     56 degrees of freedom 
# Null hypothesis probability =   1.632316e-01
 
Photon flux (15-150 keV)    in 1 sec: 10.9818 ( -0.3874  0.3913 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.07049e-07 ( -3.6949e-08  3.7004e-08 ) ergs/cm2
 
Band function
Time interval is from  122.048 sec. to  123.048 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.10296   ( 1.10296   1.10296 )
beta        : -1.30746    ( -0.0603635   0.060196 )
Epeak [keV] : 40.8436      ( -40.8436 -40.8436 )
Norm@50keV   : 0.159088    ( -0.0703404   12.7851 )
------------------------------------------------------------
# Chi-Squared =          66.24 using 59 PHA bins.
# Reduced chi-squared =          1.204 for     55 degrees of freedom 
# Null hypothesis probability =   1.426086e-01
 
Photon flux (15-150 keV)    in 1 sec: 10.9828 ( -0.387  0.3888 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.06409e-07 ( -3.7036e-08  3.7195e-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:
Thu Jun  2 10:55:45 EDT 2011