batgrbproduct Analysis for Trigger=348025

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Jun  2 11:56:18 EDT 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger348025/SDC
======================================================================

  Trigger: 00348025      Segment: 000

  BAT Trigger Time: 260145663.968   [s; MET]
      Trigger Stop: 260145664.032   [s; MET]
               UTC: 2009-03-30T22:40:59.349560    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 40.5532353454765   Dec: -27.9955276839966  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    5.83
     Image Trigger?:     NO
     Rate S/N Ratio:     6.32455532033676  [ if not an image trigger ]
     Image S/N Ratio:    5.83

  Flight Position:   [ source = BAT ]
    RA: 40.5532353454765   Dec: -27.9955276839966  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 40.5695884316673   Dec: -28.0190473462917  [deg; J2000]  
        { 02h 42m 16.7s , -28d 01' 08.6" }
         +/- 4.13276591434846 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.35968126582634 [arcmin] (formal 1-sigma fit error)
    SNR: 4.00658508599451
 
  Angular difference between Flight and Ground position is 1.655857 arcmin
 
  Partial Coding Fraction: 0.828125    [ including projection effects ]

  Duration
     T90: 0.0640000104904175 +/- 
        Measured from: 0
                   to: 0.0640000104904175     [s; relative to TRIGTIME]
     T50: 0.0640000104904175 +/- 
        Measured from: 0
                   to: 0.0640000104904175     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 0.0640000104904175 second)
        Measured from: 0     
                   to: 0.0640000104904175     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.0640000104904175     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.006739   0.005589  -0.000765   0.000152
           0.001563   0.001526   0.001265   0.001062 [error]
 Peak      0.006739   0.005589  -0.000765   0.000152
           0.001563   0.001526   0.001265   0.001062 [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 2.28e-09 1.73e-09 8.79e-10 6.41e-10 5.18e-09 5.51e-09   erg/cm2
              Error 6.95e-10 6.86e-10 6.76e-10 1.00e-09 1.91e-09 2.38e-09   erg/cm2
Peak flux Power-law 1.18e+00 5.06e-01 1.28e-01 4.01e-02 1.84e+00 1.86e+00   ph/cm2/s
              Error 3.67e-01 1.93e-01 9.57e-02 5.86e-02 5.35e-01 5.44e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.17e-09 2.43e-09 1.59e-10 6.55e-14 4.76e-09 4.76e-09   erg/cm2
              Error 8.03e-10 1.08e-09 4.39e-10 3.65e-11 1.50e-09 1.50e-09   erg/cm2
Peak flux Cutoff-PL 1.08e+00 7.35e-01 2.75e-02 6.05e-06 1.84e+00 1.84e+00   ph/cm2/s
              Error 4.24e-01 3.05e-01 6.86e-02 3.01e-03 5.19e-01 5.19e-01   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    2.971    0.688    -      -           6.84e-03 4.00e-03   47.090 57
CPL  -2.067    0.831      24.5    0.0      2.04e+01 0.00e+00   41.760 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    2.971    0.688    -      -           6.84e-03 4.00e-03   47.090 57
CPL  -2.067    0.831      24.5    0.0      2.04e+01 0.00e+00   41.760 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    0.064    0.000    0.064
T90     0.064    0.000    0.064
T50     0.064    0.000    0.064
Peak    0.064    0.000    0.064

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   40.5696 -28.0190 0.0480   24.5 -139.3       0.0111     4.0  TRIG_00348025       
------------------------------------------
 
Foreground time interval of the image:
  0.000   0.064 (delta_t =   0.064 [sec])
Background time interval of the image:
-60.968  -7.968 (delta_t =  53.000 [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    0.000 sec. to    0.064 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.97149     ( -0.58775   0.787913 )
Norm@50keV  : 6.84207E-03    ( -0.00374175   0.00424961 )
------------------------------------------------------------
# Chi-Squared =          47.09 using 59 PHA bins.
# Reduced chi-squared =         0.8261 for     57 degrees of freedom 
# Null hypothesis probability =   8.224434e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 1.84230 ( -0.530576  0.53876 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.18298e-09 ( -1.79729e-09  2.01905e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.06746     ( 2.11332   3.77556 )
Epeak [keV] : 24.5346      (   )
Norm@50keV  : 20.3858    (     )
------------------------------------------------------------
# Chi-Squared =          41.76 using 59 PHA bins.
# Reduced chi-squared =         0.7456 for     56 degrees of freedom 
# Null hypothesis probability =   9.216451e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 1.83762 ( -0.51808  0.52064 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.7594e-09 ( -1.43155e-09  1.56323e-09 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    0.064 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.50912   ( -7.36071   -5.72579 )
beta        : -9.37167    ( 10   19.9917 )
Epeak [keV] : 25.4426      ( -5.56108 4.9991 )
Norm@50keV   : 208.583    ( -208.024   1418.95 )
------------------------------------------------------------
# Chi-Squared =          41.65 using 59 PHA bins.
# Reduced chi-squared =         0.7573 for     55 degrees of freedom 
# Null hypothesis probability =   9.079175e-01
 
Photon flux (15-150 keV)    in 0.064 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    0.000 sec. to    0.064 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.97149     ( -0.58775   0.787913 )
Norm@50keV  : 6.84207E-03    ( -0.00374175   0.00424961 )
------------------------------------------------------------
# Chi-Squared =          47.09 using 59 PHA bins.
# Reduced chi-squared =         0.8261 for     57 degrees of freedom 
# Null hypothesis probability =   8.224434e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 1.84230 ( -0.530576  0.53876 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.18298e-09 ( -1.79729e-09  2.01905e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    0.064 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.06746     ( 2.11332   3.77556 )
Epeak [keV] : 24.5346      (   )
Norm@50keV  : 20.3858    (     )
------------------------------------------------------------
# Chi-Squared =          41.76 using 59 PHA bins.
# Reduced chi-squared =         0.7456 for     56 degrees of freedom 
# Null hypothesis probability =   9.216451e-01
 
Photon flux (15-150 keV)    in 0.064 sec: 1.83762 ( -0.51808  0.52064 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.7594e-09 ( -1.43155e-09  1.56323e-09 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    0.064 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 3.57683   ( -9.58401   -7.92483 )
beta        : -9.37167    ( 10   19.991 )
Epeak [keV] : 25.5760      ( -7.34084 4.92866 )
Norm@50keV   : 226.313    ( -181.349   1008.19 )
------------------------------------------------------------
# Chi-Squared =          41.66 using 59 PHA bins.
# Reduced chi-squared =         0.7574 for     55 degrees of freedom 
# Null hypothesis probability =   9.078222e-01
 
Photon flux (15-150 keV)    in 0.064 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:
Thu Jun  2 13:22:12 EDT 2011