batgrbproduct Analysis for Trigger=307309

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Sun Mar 23 06:43:48 EDT 2008
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger307309/GCN5_download_cron
======================================================================

  Trigger: 00307309      Segment: 000

  BAT Trigger Time: 227891306.048   [s; MET]
      Trigger Stop: 227891307.072   [s; MET]
               UTC: 2008-03-22T15:08:23.386180    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 52.0419672502793   Dec: -21.7046023276043  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    5.87
     Image Trigger?:     NO
     Rate S/N Ratio:     28.5131548587665  [ if not an image trigger ]
     Image S/N Ratio:    5.87

  Flight Position:   [ source = BAT ]
    RA: 52.0419672502793   Dec: -21.7046023276043  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 52.0407512649642   Dec: -21.7646934282855  [deg; J2000]  
        { 03h 28m 09.8s , -21d 45' 52.9" }
         +/- 4.43848753048208 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.60212167678669 [arcmin] (formal 1-sigma fit error)
    SNR: 3.61823645967496
    RA  =   3h 28m  9.8s  (52.040751 deg.)
    Dec =  -21d 45' 53" (-21.764693 deg.)
 
  Angular difference between Flight and Ground position is 3.606103 arcmin
 
  Partial Coding Fraction: 0.59375    [ including projection effects ]

  Duration
     T90: 1.02399998903275 +/- 
        Measured from: 0
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     T50: 1.02399998903275 +/- 
        Measured from: 0
                   to: 1.02399998903275     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1.02399998903275 second)
        Measured from: 0     
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1.02399998903275     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.004372   0.005494   0.033199   0.026380
           0.007556   0.008586   0.008923   0.010778 [error]
 Peak      0.004372   0.005494   0.033199   0.026380
           0.007556   0.008586   0.008923   0.010778 [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 1.03e-09 4.59e-09 1.74e-08 2.39e-07 5.09e-08 2.57e-07   erg/cm2
              Error 1.56e-09 4.49e-09 1.26e-08 2.15e-07 2.20e-08 2.57e-07   erg/cm2
Peak flux Power-law 3.15e-02 7.50e-02 1.42e-01 6.52e-01 3.84e-01 8.99e-01   ph/cm2/s
              Error 4.84e-02 7.50e-02 1.04e-01 6.81e-01 1.89e-01 6.34e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.00e-10 3.70e-09 2.25e-08 5.47e-08 5.28e-08 9.35e-08   erg/cm2
              Error 1.18e-09 2.97e-09 1.05e-08 2.28e-07 1.71e-08 2.32e-07   erg/cm2
Peak flux Cutoff-PL 8.93e-03 5.84e-02 1.83e-01 2.18e-01 3.80e-01 4.68e-01   ph/cm2/s
              Error 2.06e-02 5.73e-02 8.81e-02 5.68e-01 1.62e-01 5.55e-01   ph/cm2/s
 
Fluence        Band 1.70e-10 3.21e-09 2.40e-08 4.10e-08 5.25e-08 7.04e-08   erg/cm2
              Error 6.56e-10 7.84e-09 4.44e-08 1.67e-08 4.94e-08 0.00e+00   erg/cm2
Peak flux      Band 5.25e-03 4.94e-02 1.89e-01 1.94e-01 3.73e-01 4.37e-01   ph/cm2/s
              Error 5.04e-03 6.13e-02 6.68e-02 3.21e-01 1.53e-01 3.71e-01   ph/cm2/s
 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.080    1.801    -      -           2.92e-03 2.45e-03   59.010 57
CPL   0.063    1.045    9995.9    0.0      2.96e-03 0.00e+00   58.996 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.080    1.801    -      -           2.92e-03 2.45e-03   59.010 57
CPL   0.063    1.045    9995.9    0.0      2.96e-03 0.00e+00   58.996 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    1.024    0.000    1.024
T90     1.024    0.000    1.024
T50     1.024    0.000    1.024
Peak    1.024    0.000    1.024

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   52.0408 -21.7647 0.0534   38.7   -7.6       0.0647     3.6  TRIG_00307309       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-60.048 -52.231 (delta_t =   7.817 [sec])
-51.048 -10.048 (delta_t =  41.000 [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    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 7.964298E-02     ( -2.76301   0.838376 )
Norm@50keV  : 2.924575E-03    ( -2.924575E-03   1.968069E-03) )
------------------------------------------------------------
 Chi-Squared =      59.01019     using    59 PHA bins.
 Reduced chi-squared =      1.035267     for     57 degrees of freedom
 Null hypothesis probability = 0.402
 
Photon flux (15-150 keV)    in 1.024 sec: 0.384330 ( -0.183284  0.194783 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.08938e-08 ( -2.19501e-08  2.19551e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.304731E-02     ( -1.24252   0.846762 )
Epeak [keV] : 9995.93      (   )
Norm@50keV  : 2.955322E-03    (     )
------------------------------------------------------------
 Chi-Squared =      58.99626     using    59 PHA bins.
 Reduced chi-squared =      1.053505     for     56 degrees of freedom
 Null hypothesis probability = 0.367
 
Photon flux (15-150 keV)    in 1.024 sec: 0.380259 ( -0.159512  0.164769 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.2803e-08 ( -2.25126e-08  1.16323e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.735838   ( -9.26416   5.73584 )
beta        : -7.887343E-02    ( -0.839158   3.30259 )
Epeak [keV] : 18.8031      ( -18.7031 9981.20 )
Norm@50keV   : 4.067118E-03    ( -4.067118E-03   21398.3 )
------------------------------------------------------------
 Chi-Squared =      59.01019     using    59 PHA bins.
 Reduced chi-squared =      1.072913     for     55 degrees of freedom
 Null hypothesis probability = 0.331
 
Photon flux (15-150 keV)    in 1.024 sec: 0.372868 ( -0.153464  0.152172 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.24657e-08 ( -2.15438e-08  1.1903e-08 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 7.964298E-02     ( -2.76301   0.838376 )
Norm@50keV  : 2.924575E-03    ( -2.924575E-03   1.968069E-03) )
------------------------------------------------------------
 Chi-Squared =      59.01019     using    59 PHA bins.
 Reduced chi-squared =      1.035267     for     57 degrees of freedom
 Null hypothesis probability = 0.402
 
Photon flux (15-150 keV)    in 1.024 sec: 0.384330 ( -0.183284  0.194783 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.08938e-08 ( -2.19501e-08  2.19551e-08 ) ergs/cm2
 
Cutoff power-law model
Time interval is from    0.000 sec. to    1.024 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.304731E-02     ( -1.24252   0.846762 )
Epeak [keV] : 9995.93      (   )
Norm@50keV  : 2.955322E-03    (     )
------------------------------------------------------------
 Chi-Squared =      58.99626     using    59 PHA bins.
 Reduced chi-squared =      1.053505     for     56 degrees of freedom
 Null hypothesis probability = 0.367
 
Photon flux (15-150 keV)    in 1.024 sec: 0.380259 ( -0.159512  0.164769 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.2803e-08 ( -2.25126e-08  1.16323e-08 ) ergs/cm2
 
Band function
Time interval is from    0.000 sec. to    1.024 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.735838   ( -9.26416   5.73584 )
beta        : -7.887343E-02    ( -0.839158   2.69096 )
Epeak [keV] : 18.8031      ( -18.7031 9981.20 )
Norm@50keV   : 4.067118E-03    ( -4.067118E-03   21398.3 )
------------------------------------------------------------
 Chi-Squared =      59.01019     using    59 PHA bins.
 Reduced chi-squared =      1.072913     for     55 degrees of freedom
 Null hypothesis probability = 0.331
 
Photon flux (15-150 keV)    in 1.024 sec: 0.372868 ( -0.153464  0.152172 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.24657e-08 ( -2.15438e-08  1.1903e-08 ) ergs/cm2
 
Plot creation:
Sun Mar 23 06:53:54 EDT 2008