batgrbproduct Analysis for Trigger=442978

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Thu Jan 20 11:15:51 EST 2011
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger442978/GCN5_download_cron
======================================================================

  Trigger: 00442978      Segment: 000

  BAT Trigger Time: 317168464.96   [s; MET]
      Trigger Stop: 317168465.472   [s; MET]
               UTC: 2011-01-19T22:20:58.379640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 348.557715071903   Dec: 5.98467449193536  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.81
     Image Trigger?:     NO
     Rate S/N Ratio:     17.7200451466693  [ if not an image trigger ]
     Image S/N Ratio:    8.81

  Flight Position:   [ source = BAT ]
    RA: 348.557715071903   Dec: 5.98467449193536  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 348.588390353107   Dec: 5.9816313931839  [deg; J2000]  
        { 23h 14m 21.2s , +05d 58' 53.9" }
         +/- 1.45617918244204 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.792750476574009 [arcmin] (formal 1-sigma fit error)
    SNR: 17.780925165862
 
  Angular difference between Flight and Ground position is 1.839574 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 214.411999940872 +/- 12.8412573951228
        Measured from: -9.22399985790253
                   to: 205.18800008297     [s; relative to TRIGTIME]
     T50: 110.95199996233 +/- 44.3057033056932
        Measured from: 17.5560001134872
                   to: 128.508000075817     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 33.160000026226     
                   to: 34.160000026226     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -86.4399999976158     
                   to: 215.516000032425     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     3.035476   4.305743   3.259926   0.857118
           0.088537   0.092398   0.083921   0.076121 [error]
 Peak      0.055132   0.091291   0.110615   0.045475
           0.005731   0.006461   0.006626   0.005241 [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 8.89e-07 1.69e-06 2.48e-06 7.82e-06 7.03e-06 1.29e-05   erg/cm2
              Error 4.89e-08 5.27e-08 8.62e-08 6.32e-07 2.08e-07 6.78e-07   erg/cm2
Peak flux Power-law 4.24e-01 6.27e-01 6.92e-01 1.44e+00 2.18e+00 3.18e+00   ph/cm2/s
              Error 6.17e-02 5.45e-02 4.98e-02 2.33e-01 1.48e-01 2.54e-01   ph/cm2/s
 
Fluence   Cutoff-PL 8.55e-07 1.71e-06 2.51e-06 6.09e-06 6.93e-06 1.12e-05   erg/cm2
              Error 6.30e-08 5.72e-08 9.34e-08 1.58e-06 2.38e-07 1.47e-06   erg/cm2
Peak flux Cutoff-PL 4.24e-01 6.27e-01 6.93e-01 1.43e+00 2.18e+00 3.17e+00   ph/cm2/s
              Error 6.17e-02 5.46e-02 4.98e-02 2.53e-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    1.444    0.053    -      -           2.43e-03 6.61e-05   46.410 57
CPL   1.246    0.209     202.9  -64.4      3.00e-03 6.40e-04   44.460 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    0.858    0.122    -      -           1.90e-02 1.29e-03   64.090 57
CPL   0.851    0.152    10000.0    0.0      1.91e-02 1.30e-03   64.080 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: 203.712000 sec.
T50 in the 50-300 keV band: 56.448000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  301.956  -86.440  215.516
T90   214.412   -9.224  205.188
T50   110.952   17.556  128.508
Peak    1.000   33.160   34.160

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  348.5884  +5.9816 0.0109   10.0 -119.8       1.9853    17.8  TRIG_00442978       
------------------------------------------
 
Foreground time interval of the image:
-86.440  10.741 (delta_t =  97.181 [sec])
Background time interval of the image:
-239.960 -86.440 (delta_t = 153.520 [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  -86.440 sec. to  215.516 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.44405     ( -0.0532848   0.0533015 )
Norm@50keV  : 2.42892E-03    ( -6.61165e-05   6.60999e-05 )
------------------------------------------------------------
# Chi-Squared =          46.41 using 59 PHA bins.
# Reduced chi-squared =         0.8143 for     57 degrees of freedom 
# Null hypothesis probability =   8.406074e-01
 
Photon flux (15-150 keV)    in 302 sec: 0.298891 ( -0.00875413  0.00877636 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.02715e-06 ( -2.08016e-07  2.08603e-07 ) ergs/cm2
 
Cutoff power-law model
Time interval is from  -86.440 sec. to  215.516 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24584     ( -0.196091   0.222132 )
Epeak [keV] : 202.867      ( -77.025 -205.886 )
Norm@50keV  : 3.00496E-03    ( -0.000585931   0.000693863 )
------------------------------------------------------------
# Chi-Squared =          44.46 using 59 PHA bins.
# Reduced chi-squared =         0.7939 for     56 degrees of freedom 
# Null hypothesis probability =   8.668807e-01
 
Photon flux (15-150 keV)    in 302 sec: 0.294988 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.92906e-06 ( -2.39275e-07  2.36979e-07 ) ergs/cm2
 
Band function
Time interval is from  -86.440 sec. to  215.516 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.21950   ( -1.33584   -0.453116 )
beta        : -1.49114    ( -0.0825362   0.0666243 )
Epeak [keV] : 32.4554      ( -11.4858 88.7601 )
Norm@50keV   : 0.190104    ( -0.190104   64.1443 )
------------------------------------------------------------
# Chi-Squared =          41.21 using 59 PHA bins.
# Reduced chi-squared =         0.7494 for     55 degrees of freedom 
# Null hypothesis probability =   9.159966e-01
 
Photon flux (15-150 keV)    in 302 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   33.160 sec. to   34.160 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.857766     ( -0.122923   0.120674 )
Norm@50keV  : 1.90060E-02    ( -0.00129338   0.00128861 )
------------------------------------------------------------
# Chi-Squared =          64.09 using 59 PHA bins.
# Reduced chi-squared =          1.124 for     57 degrees of freedom 
# Null hypothesis probability =   2.418818e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.18154 ( -0.147521  0.14769 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.16888e-07 ( -1.61149e-08  1.62104e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   33.160 sec. to   34.160 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.850895     ( -0.16782   0.135484 )
Epeak [keV] : 10000.00      (   )
Norm@50keV  : 1.91364E-02    ( -0.00129918   0.00129477 )
------------------------------------------------------------
# Chi-Squared =          64.08 using 59 PHA bins.
# Reduced chi-squared =          1.144 for     56 degrees of freedom 
# Null hypothesis probability =   2.140833e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.18095 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.16505e-07 ( -1.5681e-08  1.5579e-08 ) ergs/cm2
 
Band function
Time interval is from   33.160 sec. to   34.160 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99999   ( -171148   -171148 )
beta        : -0.867992    ( -0.121083   0.123267 )
Epeak [keV] : 22.2025      ( -22.2025 7.78455 )
Norm@50keV   : 2225.14    ( -1830.58   2.01485e+06 )
------------------------------------------------------------
# Chi-Squared =          63.79 using 59 PHA bins.
# Reduced chi-squared =          1.160 for     55 degrees of freedom 
# Null hypothesis probability =   1.948806e-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 Jan 20 11:32:17 EST 2011