batgrbproduct Analysis for Trigger=315630

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Tue Jul  1 23:25:25 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger315630/GCN5_download_cron
======================================================================

  Trigger: 00315630      Segment: 000

  BAT Trigger Time: 236609408.064   [s; MET]
      Trigger Stop: 236609408.32   [s; MET]
               UTC: 2008-07-01T12:50:05.156340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 35.5704321007523   Dec: 39.8289431960506  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.54
     Image Trigger?:     NO
     Rate S/N Ratio:     6.16441400296898  [ if not an image trigger ]
     Image S/N Ratio:    6.54

  Flight Position:   [ source = BAT ]
    RA: 35.5704321007523   Dec: 39.8289431960506  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 35.5547027401129   Dec: 39.8176177195545  [deg; J2000]  
        { 02h 22m 13.1s , +39d 49' 03.4" }
         +/- 3.02474272766504 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.75875413348537 [arcmin] (formal 1-sigma fit error)
    SNR: 6.25778455148836
 
  Angular difference between Flight and Ground position is 0.993549 arcmin
 
  Partial Coding Fraction: 0.6796875    [ including projection effects ]

  Duration
     T90: 0.0679999887943268 +/- 0.0252982160037338
        Measured from: 0.104000002145767
                   to: 0.171999990940094     [s; relative to TRIGTIME]
     T50: 0.0399999916553497 +/- 0.0226273996334777
        Measured from: 0.127999991178513
                   to: 0.167999982833862     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.358000010251999     
                   to: 0.641999989748001     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0.104000002145767     
                   to: 0.175999999046326     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.004755   0.009259   0.003631   0.002911
           0.001791   0.001968   0.001708   0.001602 [error]
 Peak      0.004979   0.009540   0.003383   0.002917
           0.001829   0.002032   0.001758   0.001622 [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 1.47e-09 7.68e-10 2.48e-10 1.03e-10 2.54e-09 2.62e-09   erg/cm2
              Error 7.72e-10 3.59e-10 1.43e-10 8.55e-11 1.21e-09 1.23e-09   erg/cm2
Peak flux Power-law 7.14e-01 2.06e-01 3.23e-02 5.78e-03 9.56e-01 9.58e-01   ph/cm2/s
              Error 3.59e-01 9.28e-02 1.81e-02 5.38e-03 4.54e-01 4.55e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.31e-09 4.06e-09 2.05e-09 6.61e-11 7.51e-09 7.43e-09   erg/cm2
              Error 5.64e-10 1.18e-09 8.10e-10 5.49e-11 2.13e-09 2.14e-09   erg/cm2
Peak flux Cutoff-PL 7.14e-01 2.06e-01 3.23e-02 5.77e-03 9.57e-01 9.58e-01   ph/cm2/s
              Error 3.59e-01 9.29e-02 1.82e-02 5.37e-03 4.54e-01 4.54e-01   ph/cm2/s
 
Fluence        Band 9.30e-10 4.26e-09 2.30e-09 5.88e-11 7.60e-09 7.71e-09   erg/cm2
              Error 6.97e-10 1.22e-09 1.13e-09 5.72e-11 2.18e-09 2.19e-09   erg/cm2
Peak flux      Band 3.95e-01 1.01e+00 3.01e-01 3.93e-03 1.72e+00 1.72e+00   ph/cm2/s
              Error 2.49e-01 2.90e-01 2.23e-01 3.90e-03 5.27e-01 5.57e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.629    0.532    -      -           2.07e-03 1.07e-03   78.284 57
CPL  -2.499    0.000      41.1    4.7      4.94e+00 5.59e+00   57.314 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    3.675    0.525    -      -           2.05e-03 1.04e-03   78.372 57
CPL  -2.494    0.000      40.6    4.9      4.98e+00 5.79e+00   58.359 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    0.072    0.104    0.176
T90     0.068    0.104    0.172
T50     0.040    0.128    0.168
Peak    1.000   -0.358    0.642

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   35.5547 +39.8176 0.0307   36.0  -15.1       0.0209     6.3  TRIG_00315630       
------------------------------------------
 
Foreground time interval of the image:
  0.104   0.176 (delta_t =   0.072 [sec])
Background time interval of the image:
-239.064 -65.964 (delta_t = 173.100 [sec])
-65.064   0.104 (delta_t =  65.168 [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    0.104 sec. to    0.176 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.62868     ( -0.449656   0.613598 )
Norm@50keV  : 2.070544E-03    ( -1.094675E-03   1.045403E-03) )
------------------------------------------------------------
 Chi-Squared =      78.28392     using    59 PHA bins.
 Reduced chi-squared =      1.373402     for     57 degrees of freedom
 Null hypothesis probability = 3.222E-02
 
Photon flux (15-150 keV)    in 7.2000E-02 sec: 0.930660 ( -0.462746  0.46392 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.54393e-09 ( -1.21242e-09  1.21052e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.104 sec. to    0.176 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.49946     (     )
Epeak [keV] : 41.0620      ( -5.68449 3.80251 )
Norm@50keV  : 4.93525    ( -3.56075   7.62179 )
------------------------------------------------------------
 Chi-Squared =      57.31365     using    59 PHA bins.
 Reduced chi-squared =      1.023458     for     56 degrees of freedom
 Null hypothesis probability = 0.426
 
Photon flux (15-150 keV)    in 7.2000E-02 sec: 1.84028 ( -0.54175  0.5424 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.51046e-09 ( -2.1561e-09  2.1127e-09 ) ergs/cm2
 
Band function
Time interval is from    0.104 sec. to    0.176 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.581149   ( -1.70823   2.24848 )
beta        : -9.36776    ( -6.771088E-05   19.9997 )
Epeak [keV] : 22.7255      ( -7.87914 5.78340 )
Norm@50keV   : 0.183373    ( -12.4025   36.1071 )
------------------------------------------------------------
 Chi-Squared =      66.29649     using    59 PHA bins.
 Reduced chi-squared =      1.205391     for     55 degrees of freedom
 Null hypothesis probability = 0.141
 
Photon flux (15-150 keV)    in 7.2000E-02 sec: 1.78743 ( -0.52957  0.53188 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.59838e-09 ( -2.20495e-09  2.16396e-09 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.104 sec. to    0.180 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.67520     ( -0.435495   0.614357 )
Norm@50keV  : 2.046282E-03    ( -1.068504E-03   1.011291E-03) )
------------------------------------------------------------
 Chi-Squared =      78.37216     using    59 PHA bins.
 Reduced chi-squared =      1.374950     for     57 degrees of freedom
 Null hypothesis probability = 3.174E-02
 
Photon flux (15-150 keV)    in 7.6000E-02 sec: 0.956081 ( -0.453971  0.454589 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.73506e-09 ( -1.24759e-09  1.24634e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.104 sec. to    0.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.49389     (     )
Epeak [keV] : 40.6373      ( -5.89715 3.84509 )
Norm@50keV  : 4.97523    ( -3.56796   8.01547 )
------------------------------------------------------------
 Chi-Squared =      58.35868     using    59 PHA bins.
 Reduced chi-squared =      1.042119     for     56 degrees of freedom
 Null hypothesis probability = 0.389
 
Photon flux (15-150 keV)    in 7.6000E-02 sec: 0.956648 ( -0.453909  0.454532 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.65138e-09 ( -2.17795e-09  2.17945e-09 ) ergs/cm2
 
Band function
Time interval is from    0.104 sec. to    0.180 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.584336   ( -0.595088   3.24473 )
beta        : -8.90801    ( -6.275177E-04   19.9974 )
Epeak [keV] : 21.9976      ( -8.27044 5.80909 )
Norm@50keV   : 0.189191    ( -11.3396   37.4618 )
------------------------------------------------------------
 Chi-Squared =      67.04644     using    59 PHA bins.
 Reduced chi-squared =      1.219026     for     55 degrees of freedom
 Null hypothesis probability = 0.128
 
Photon flux (15-150 keV)    in 7.6000E-02 sec: 1.72292 ( -0.50694  0.54697 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.72358e-09 ( -2.22008e-09  2.2176e-09 ) ergs/cm2
 
Plot creation:
Wed Jul  2 00:08:06 EDT 2008