batgrbproduct Analysis for Trigger=446677

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Feb 24 18:08:39 EST 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger446677/GCN5_download_cron
======================================================================

  Trigger: 00446677      Segment: 000

  BAT Trigger Time: 320189154.752   [s; MET]
      Trigger Stop: 320189156.8   [s; MET]
               UTC: 2011-02-23T21:25:48.058640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 150.275688090159   Dec: -68.3291791093942  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.1
     Image Trigger?:     NO
     Rate S/N Ratio:     15.5884572681199  [ if not an image trigger ]
     Image S/N Ratio:    7.1

  Flight Position:   [ source = BAT ]
    RA: 150.275688090159   Dec: -68.3291791093942  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 150.308501700927   Dec: -68.3109089773887  [deg; J2000]  
        { 10h 01m 14.0s , -68d 18' 39.3" }
         +/- 1.74675024188164 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.866763850191704 [arcmin] (formal 1-sigma fit error)
    SNR: 13.7111651763171
 
  Angular difference between Flight and Ground position is 1.315550 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 62.1159999370575 +/- 8.72168355712865
        Measured from: -44.8439998626709
                   to: 17.2720000743866     [s; relative to TRIGTIME]
     T50: 29.5399999022484 +/- 8.46548995174556
        Measured from: -28.8319998383522
                   to: 0.708000063896179     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.992000043392181     
                   to: 1.99200004339218     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -45.7919999957085     
                   to: 19.8800000548363     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.383397   0.379688   0.253221   0.082043
           0.038948   0.039646   0.035093   0.031050 [error]
 Peak      0.019649   0.015313   0.034850   0.005079
           0.005144   0.005388   0.004854   0.004080 [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 9.66e-08 1.61e-07 2.04e-07 5.14e-07 6.04e-07 9.75e-07   erg/cm2
              Error 1.69e-08 1.73e-08 3.48e-08 1.87e-07 8.01e-08 2.17e-07   erg/cm2
Peak flux Power-law 1.39e-01 1.80e-01 1.71e-01 2.88e-01 5.86e-01 7.77e-01   ph/cm2/s
              Error 5.90e-02 4.49e-02 3.83e-02 1.50e-01 1.19e-01 1.70e-01   ph/cm2/s
 
Fluence   Cutoff-PL 9.66e-08 1.61e-07 2.04e-07 5.10e-07 6.04e-07 9.71e-07   erg/cm2
              Error 1.69e-08 1.74e-08 3.49e-08 1.85e-07 8.01e-08 2.16e-07   erg/cm2
Peak flux Cutoff-PL 1.38e-01 1.80e-01 1.71e-01 2.86e-01 5.85e-01 7.75e-01   ph/cm2/s
              Error 5.89e-02 4.49e-02 3.84e-02 1.69e-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 1.38e-01 7.70e-01 0.00e+00 0.00e+00 0.00e+00 0.00e+00   ph/cm2/s
              Error 1.69e-01 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    1.661    0.211    -      -           1.03e-03 1.26e-04   57.090 57
CPL   1.677    0.213    9999.4    0.0      1.03e-03 0.00e+00   57.110 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    1.073    0.387    -      -           5.06e-03 9.98e-04   67.980 57
CPL   1.063    0.833    9999.4    0.0      5.09e-03 5.83e-03   67.980 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: 1.856000 sec.
T50 in the 50-300 keV band: 1.024000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   65.672  -45.792   19.880
T90    62.116  -44.844   17.272
T50    29.540  -28.832    0.708
Peak    1.000    0.992    1.992

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  150.3085 -68.3109 0.0140    8.6  173.3       1.0325    13.7  TRIG_00446677       
------------------------------------------
 
Foreground time interval of the image:
-45.792 -12.462 (delta_t =  33.330 [sec])
-11.752 -11.402 (delta_t =   0.350 [sec])
-10.752  12.128 (delta_t =  22.880 [sec])
 13.248  19.880 (delta_t =   6.632 [sec])
Background time interval of the image:
-239.752 -56.628 (delta_t = 183.124 [sec])
-55.752 -45.792 (delta_t =   9.960 [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
Multiple GTIs in the spectrum
tstart tstop
-45.792000 -12.462000
-11.751900 -11.402000
-10.752000 12.128000
13.248000 19.880000
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.66101     ( -0.20788   0.213634 )
Norm@50keV  : 1.02934E-03    ( -0.000127316   0.00012413 )
------------------------------------------------------------
# Chi-Squared =          57.09 using 59 PHA bins.
# Reduced chi-squared =          1.002 for     57 degrees of freedom 
# Null hypothesis probability =   4.718294e-01
 
Photon flux (15-150 keV)    in 63.19 sec: 0.134898 ( -0.0145176  0.0145263 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.04278e-07 ( -7.93003e-08  8.09287e-08 ) ergs/cm2
 
Cutoff power-law model
Multiple GTIs in the spectrum
tstart tstop
-45.792000 -12.462000
-11.751900 -11.402000
-10.752000 12.128000
13.248000 19.880000
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.67715     ( -0.226248   0.199245 )
Epeak [keV] : 9999.35      (   )
Norm@50keV  : 1.02557E-03    (     )
------------------------------------------------------------
# Chi-Squared =          57.11 using 59 PHA bins.
# Reduced chi-squared =          1.020 for     56 degrees of freedom 
# Null hypothesis probability =   4.334712e-01
 
Photon flux (15-150 keV)    in 63.19 sec: 0.134844 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.04182e-07 ( -7.93091e-08  8.09363e-08 ) ergs/cm2
 
Band function
Multiple GTIs in the spectrum
tstart tstop
-45.792000 -12.462000
-11.751900 -11.402000
-10.752000 12.128000
13.248000 19.880000
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.26986   ( 1.26986   1.26986 )
beta        : -1.66199    ( 1.66199   0.208616 )
Epeak [keV] : 30.7664      ( -30.7664 -30.7664 )
Norm@50keV   : 2.35165E-03    ( -0.00235165   5.40135 )
------------------------------------------------------------
# Chi-Squared =          57.08 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     55 degrees of freedom 
# Null hypothesis probability =   3.975686e-01
 
Photon flux (15-150 keV)    in 63.19 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    0.992 sec. to    1.992 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.07319     ( -0.39303   0.380062 )
Norm@50keV  : 5.06029E-03    ( -0.000999746   0.000995544 )
------------------------------------------------------------
# Chi-Squared =          67.98 using 59 PHA bins.
# Reduced chi-squared =          1.193 for     57 degrees of freedom 
# Null hypothesis probability =   1.514616e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.585524 ( -0.118681  0.119111 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.33714e-08 ( -1.17073e-08  1.18251e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.992 sec. to    1.992 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.06350     ( -1.28044   0.386265 )
Epeak [keV] : 9999.36      ( -9993.79 -9993.79 )
Norm@50keV  : 5.08653E-03    ( -0.000995731   0.0106592 )
------------------------------------------------------------
# Chi-Squared =          67.98 using 59 PHA bins.
# Reduced chi-squared =          1.214 for     56 degrees of freedom 
# Null hypothesis probability =   1.308403e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.585284 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.33856e-08 ( -1.1703e-08  1.18343e-08 ) ergs/cm2
 
Band function
Time interval is from    0.992 sec. to    1.992 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.912286   ( 0.91226   0.91226 )
beta        : -1.07321    ( 1.07318   0.393019 )
Epeak [keV] : 41.3738      ( -41.3769 -41.3769 )
Norm@50keV   : 8.33381E-03    ( -0.00833369   7365.89 )
------------------------------------------------------------
# Chi-Squared =          67.98 using 59 PHA bins.
# Reduced chi-squared =          1.236 for     55 degrees of freedom 
# Null hypothesis probability =   1.123783e-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:
Thu Feb 24 18:21:33 EST 2011