batgrbproduct Analysis for Trigger=441676

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Jan  7 13:10:17 EST 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger441676/GCN5_download_cron
======================================================================

  Trigger: 00441676      Segment: 000

  BAT Trigger Time: 316041983.552   [s; MET]
      Trigger Stop: 316041984.576   [s; MET]
               UTC: 2011-01-06T21:26:17.013580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 134.195686538916   Dec: 46.9977905824713  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.63
     Image Trigger?:     NO
     Rate S/N Ratio:     12.8062484748657  [ if not an image trigger ]
     Image S/N Ratio:    7.63

  Flight Position:   [ source = BAT ]
    RA: 134.195686538916   Dec: 46.9977905824713  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 134.164298616741   Dec: 47.0095708322205  [deg; J2000]  
        { 08h 56m 39.4s , +47d 00' 34.5" }
         +/- 1.22982362065374 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.514999656123268 [arcmin] (formal 1-sigma fit error)
    SNR: 22.634529945485
 
  Angular difference between Flight and Ground position is 1.465953 arcmin
 
  Partial Coding Fraction: 0.375    [ including projection effects ]

  Duration
     T90: 43.4560000300407 +/- 16.6266176856008
        Measured from: -22.4319998621941
                   to: 21.0240001678467     [s; relative to TRIGTIME]
     T50: 14.8640000224113 +/- 1.33184983163053
        Measured from: 0.240000128746033
                   to: 15.1040001511574     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.88400000333786     
                   to: 5.88400000333786     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -30.4480000138283     
                   to: 23.5040000081062     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.176777   1.320441   0.790124   0.233915
           0.073641   0.075636   0.066287   0.056996 [error]
 Peak      0.055378   0.095669   0.072141   0.008276
           0.010690   0.011450   0.010140   0.008568 [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 3.83e-07 5.80e-07 6.58e-07 1.42e-06 2.05e-06 3.04e-06   erg/cm2
              Error 4.03e-08 3.85e-08 6.67e-08 2.98e-07 1.55e-07 3.59e-07   erg/cm2
Peak flux Power-law 6.99e-01 6.85e-01 4.70e-01 5.06e-01 2.06e+00 2.36e+00   ph/cm2/s
              Error 1.57e-01 9.80e-02 8.16e-02 1.75e-01 2.84e-01 3.24e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.77e-07 5.91e-07 6.60e-07 1.09e-06 2.02e-06 2.71e-06   erg/cm2
              Error 4.48e-08 4.79e-08 6.85e-08 6.01e-07 1.75e-07 5.09e-07   erg/cm2
Peak flux Cutoff-PL 5.76e-01 7.49e-01 5.12e-01 2.00e-01 1.98e+00 2.04e+00   ph/cm2/s
              Error 1.96e-01 1.22e-01 9.79e-02 3.66e-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    1.818    0.123    -      -           4.12e-03 3.05e-04   36.600 57
CPL   1.668    0.477     100.4    0.0      4.98e-03 0.00e+00   36.290 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    1.544    0.227    -      -           1.63e-02 2.28e-03   43.050 57
CPL   0.514    1.164      72.9  302.6      5.32e-02 1.06e-01   40.110 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: 20.864000 sec.
T50 in the 50-300 keV band: 13.696000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   53.952  -30.448   23.504
T90    43.456  -22.432   21.024
T50    14.864    0.240   15.104
Peak    1.000    4.884    5.884

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  134.1643 +47.0096 0.0086   34.0   41.1       3.6724    22.6  TRIG_00441676       
------------------------------------------
 
Foreground time interval of the image:
-30.448  23.504 (delta_t =  53.952 [sec])
Background time interval of the image:
-239.552 -30.448 (delta_t = 209.104 [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  -30.448 sec. to   23.504 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.81821     ( -0.121812   0.124217 )
Norm@50keV  : 4.12456E-03    ( -0.000306713   0.000303242 )
------------------------------------------------------------
# Chi-Squared =          36.60 using 59 PHA bins.
# Reduced chi-squared =         0.6422 for     57 degrees of freedom 
# Null hypothesis probability =   9.837195e-01
 
Photon flux (15-150 keV)    in 53.95 sec: 0.572418 ( -0.0385681  0.0386129 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.04736e-06 ( -1.53859e-07  1.55225e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -30.448 sec. to   23.504 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66774     ( -0.494067   0.459694 )
Epeak [keV] : 100.389      (   )
Norm@50keV  : 4.98126E-03    (     )
------------------------------------------------------------
# Chi-Squared =          36.29 using 59 PHA bins.
# Reduced chi-squared =         0.6481 for     56 degrees of freedom 
# Null hypothesis probability =   9.810364e-01
 
Photon flux (15-150 keV)    in 53.95 sec: 0.568175 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.01824e-06 ( -1.792e-07  1.70536e-07 ) ergs/cm2
 
Band function
Time interval is from  -30.448 sec. to   23.504 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.47601   ( -1.45337   -1.45337 )
beta        : -1.90143    ( -0.189332   0.167709 )
Epeak [keV] : 25.8700      ( -25.9236 62.3684 )
Norm@50keV   : 1.24233    ( -1.14689   378.456 )
------------------------------------------------------------
# Chi-Squared =          34.73 using 59 PHA bins.
# Reduced chi-squared =         0.6315 for     55 degrees of freedom 
# Null hypothesis probability =   9.851143e-01
 
Photon flux (15-150 keV)    in 53.95 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    4.884 sec. to    5.884 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.54450     ( -0.224178   0.229957 )
Norm@50keV  : 1.62683E-02    ( -0.00228754   0.00226946 )
------------------------------------------------------------
# Chi-Squared =          43.05 using 59 PHA bins.
# Reduced chi-squared =         0.7553 for     57 degrees of freedom 
# Null hypothesis probability =   9.142034e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.05621 ( -0.283718  0.284233 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53272e-07 ( -2.31064e-08  2.33626e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    4.884 sec. to    5.884 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.514461     ( -1.30817   1.02032 )
Epeak [keV] : 72.9315      ( -18.1701 587.053 )
Norm@50keV  : 5.32296E-02    ( -0.0363765   0.175111 )
------------------------------------------------------------
# Chi-Squared =          40.11 using 59 PHA bins.
# Reduced chi-squared =         0.7163 for     56 degrees of freedom 
# Null hypothesis probability =   9.460629e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.97502 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.44631e-07 ( -2.4434e-08  2.5024e-08 ) ergs/cm2
 
Band function
Time interval is from    4.884 sec. to    5.884 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.518009   ( -0.71836   2.21655 )
beta        : -3.04791    ( 2.98926   10.8135 )
Epeak [keV] : 72.6626      ( -22.0727 349.851 )
Norm@50keV   : 5.30604E-02    ( -0.0362745   1.061 )
------------------------------------------------------------
# Chi-Squared =          40.10 using 59 PHA bins.
# Reduced chi-squared =         0.7292 for     55 degrees of freedom 
# Null hypothesis probability =   9.342633e-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:
Fri Jan  7 13:38:33 EST 2011