batgrbproduct Analysis for Trigger=437016

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Sun Oct 24 20:18:53 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger437016/GCN5_download_cron
======================================================================

  Trigger: 00437016      Segment: 000

  BAT Trigger Time: 309613176.128   [s; MET]
      Trigger Stop: 309613176.384   [s; MET]
               UTC: 2010-10-24T11:39:29.826060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 66.4748790740036   Dec: -77.2476285132087  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.55
     Image Trigger?:     NO
     Rate S/N Ratio:     29.698484809835  [ if not an image trigger ]
     Image S/N Ratio:    11.55

  Flight Position:   [ source = BAT ]
    RA: 66.4748790740036   Dec: -77.2476285132087  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 66.4651041235144   Dec: -77.2610192953414  [deg; J2000]  
        { 04h 25m 51.6s , -77d 15' 39.7" }
         +/- 1.05458067172549 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.380343637664659 [arcmin] (formal 1-sigma fit error)
    SNR: 28.1933853021721
 
  Angular difference between Flight and Ground position is 0.813800 arcmin
 
  Partial Coding Fraction: 0.765625    [ including projection effects ]

  Duration
     T90: 18.7239999771118 +/- 0.488491546585049
        Measured from: 0.132000088691711
                   to: 18.8560000658035     [s; relative to TRIGTIME]
     T50: 13.6679999232292 +/- 4.85472966560196
        Measured from: 2.05200010538101
                   to: 15.7200000286102     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 9.39199995994568     
                   to: 10.3919999599457     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.252000033855438     
                   to: 20.1319999694824     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.831760   1.040737   0.653536   0.072101
           0.030757   0.032192   0.027694   0.022432 [error]
 Peak      0.162505   0.270611   0.200074   0.038629
           0.008779   0.010136   0.009212   0.006172 [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 2.93e-07 4.38e-07 4.90e-07 1.04e-06 1.54e-06 2.26e-06   erg/cm2
              Error 1.91e-08 1.74e-08 2.72e-08 1.22e-07 6.42e-08 1.44e-07   erg/cm2
Peak flux Power-law 1.80e+00 1.83e+00 1.32e+00 1.51e+00 5.54e+00 6.46e+00   ph/cm2/s
              Error 1.16e-01 7.91e-02 7.03e-02 1.54e-01 2.32e-01 2.80e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.60e-07 4.65e-07 5.02e-07 4.19e-07 1.45e-06 1.65e-06   erg/cm2
              Error 2.32e-08 2.11e-08 3.00e-08 1.53e-07 7.21e-08 1.69e-07   erg/cm2
Peak flux Cutoff-PL 1.53e+00 2.08e+00 1.44e+00 5.25e-01 5.43e+00 5.58e+00   ph/cm2/s
              Error 1.35e-01 1.05e-01 8.47e-02 2.67e-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 5.62e+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    1.838    0.071    -      -           8.19e-03 3.38e-04   66.910 57
CPL   1.147    0.310      60.0    9.3      1.84e-02 6.79e-03   49.930 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    1.476    0.064    -      -           4.46e-02 1.94e-03   90.760 57
CPL   0.373    0.309      71.6    8.6      1.69e-01 6.42e-02   43.470 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: 18.624000 sec.
T50 in the 50-300 keV band: 9.216000 sec.
 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   20.384   -0.252   20.132
T90    18.724    0.132   18.856
T50    13.668    2.052   15.720
Peak    1.000    9.392   10.392

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   66.4651 -77.2610 0.0068   31.0  178.8       1.1406    28.2  TRIG_00437016       
------------------------------------------
 
Foreground time interval of the image:
 -0.252   9.273 (delta_t =   9.525 [sec])
Background time interval of the image:
-239.128  -0.252 (delta_t = 238.876 [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   -0.252 sec. to   20.132 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.83754     ( -0.0710207   0.0718027 )
Norm@50keV  : 8.19015E-03    ( -0.000339153   0.000337655 )
------------------------------------------------------------
# Chi-Squared =          66.91 using 59 PHA bins.
# Reduced chi-squared =          1.174 for     57 degrees of freedom 
# Null hypothesis probability =   1.733086e-01
 
Photon flux (15-150 keV)    in 20.38 sec: 1.14543 ( -0.0469614  0.0470781 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.53507e-06 ( -6.40711e-08  6.42903e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.252 sec. to   20.132 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.14675     ( -0.321401   0.299346 )
Epeak [keV] : 59.9695      ( -6.80702 11.7598 )
Norm@50keV  : 1.84142E-02    ( -0.00534211   0.00824366 )
------------------------------------------------------------
# Chi-Squared =          49.93 using 59 PHA bins.
# Reduced chi-squared =         0.8917 for     56 degrees of freedom 
# Null hypothesis probability =   7.025057e-01
 
Photon flux (15-150 keV)    in 20.38 sec: 1.09639 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45499e-06 ( -7.19108e-08  7.22614e-08 ) ergs/cm2
 
Band function
Time interval is from   -0.252 sec. to   20.132 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.14677   ( -0.286444   0.338927 )
beta        : -10.00000    ( 1.02892e+11   1.02892e+11 )
Epeak [keV] : 59.9613      ( -6.81946 11.7545 )
Norm@50keV   : 1.84115E-02    ( -0.00534121   0.00824808 )
------------------------------------------------------------
# Chi-Squared =          49.93 using 59 PHA bins.
# Reduced chi-squared =         0.9079 for     55 degrees of freedom 
# Null hypothesis probability =   6.680439e-01
 
Photon flux (15-150 keV)    in 20.38 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    9.392 sec. to   10.392 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47577     ( -0.06407   0.0645668 )
Norm@50keV  : 4.46452E-02    ( -0.00194102   0.00193636 )
------------------------------------------------------------
# Chi-Squared =          90.76 using 59 PHA bins.
# Reduced chi-squared =          1.592 for     57 degrees of freedom 
# Null hypothesis probability =   2.968227e-03
 
Photon flux (15-150 keV)    in 1 sec: 5.53796 ( -0.232018  0.232048 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.25263e-07 ( -2.02807e-08  2.03459e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    9.392 sec. to   10.392 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.373426     ( -0.320479   0.298345 )
Epeak [keV] : 71.5687      ( -6.92619 10.1899 )
Norm@50keV  : 0.169160    ( -0.0502189   0.0782223 )
------------------------------------------------------------
# Chi-Squared =          43.47 using 59 PHA bins.
# Reduced chi-squared =         0.7762 for     56 degrees of freedom 
# Null hypothesis probability =   8.891398e-01
 
Photon flux (15-150 keV)    in 1 sec: 5.42692 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.00027e-07 ( -2.1527e-08  2.164e-08 ) ergs/cm2
 
Band function
Time interval is from    9.392 sec. to   10.392 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.373127   ( -0.208104   0.428615 )
beta        : -10.00000    ( 3.94151e+08   3.94151e+08 )
Epeak [keV] : 71.5479      ( -6.91779 10.1946 )
Norm@50keV   : 0.169233    ( -0.0502826   0.0782375 )
------------------------------------------------------------
# Chi-Squared =          43.47 using 59 PHA bins.
# Reduced chi-squared =         0.7903 for     55 degrees of freedom 
# Null hypothesis probability =   8.692209e-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:
Sun Oct 24 20:38:15 EDT 2010