batgrbproduct Analysis for Trigger=276045

Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.41
    Process Start Time (local time): Thu Dec 13 17:48:38 EST 2007
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger276045/GCN5_download_cron
======================================================================

  Trigger: 00276045      Segment: 000

  BAT Trigger Time: 198588062.688   [s; MET]
      Trigger Stop: 198588063.072   [s; MET]
               UTC: 2007-04-18T11:21:00.789900    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) Expanded to TRIGTIME - 32 ms to TRIGTIME + 320 ms

  BAT 
    RA: 228.503949739379   Dec: 51.2262702772327  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.61
     Image Trigger?:     NO
     Rate S/N Ratio:     10.3923048454133  [ if not an image trigger ]
     Image S/N Ratio:    6.61

  Flight Position:   [ source = BAT ]
    RA: 228.503949739379   Dec: 51.2262702772327  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 228.755077695506   Dec: 51.0180437075928  [deg; J2000]  
        { 15h 15m 01.2s , +51d 01' 05.0" }
         +/- 25.6738570680574 [arcmin] (estimated 90% radius based on SNR)
         +/- 33.6997670287709 [arcmin] (formal 1-sigma fit error)
    SNR: 0.294821830595774
    RA  =  15h 15m  1.2s  (228.755078 deg.)
    Dec =  51d  1'  5" (51.018044 deg.)
 
  Angular difference between Flight and Ground position is 15.669456 arcmin
 
  Partial Coding Fraction: 0.75    [ including projection effects ]

  Duration
     T90: 0.38400000333786 +/- 
        Measured from: 0
                   to: 0.38400000333786     [s; relative to TRIGTIME]
     T50: 0.38400000333786 +/- 
        Measured from: 0
                   to: 0.38400000333786     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 0.38400000333786 second)
        Measured from: 0     
                   to: 0.38400000333786     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 0.38400000333786     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total    -0.002081  -0.000981  -0.000083   0.004668
           0.003296   0.003336   0.002950   0.002808 [error]
 Peak     -0.002081  -0.000981  -0.000083   0.004668
           0.003296   0.003336   0.002950   0.002808 [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 3.63e-12 4.11e-11 4.33e-10 3.39e-08 1.90e-09 0.00e+00   erg/cm2
              Error 4.96e-10 6.32e-10 1.41e-09 6.96e-08 4.30e-09 0.00e+00   erg/cm2
Peak flux Power-law 3.12e-04 1.76e-03 8.91e-03 2.15e-01 2.90e-02 0.00e+00   ph/cm2/s
              Error 4.38e-02 2.89e-02 3.08e-02 4.35e-01 9.11e-02 0.00e+00   ph/cm2/s
 
Fluence   Cutoff-PL 1.83e-12 2.53e-11 3.90e-10 7.16e-08 1.87e-09 0.00e+00   erg/cm2
              Error 6.23e-10 1.26e-07 4.41e-09 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux Cutoff-PL 3.65e-04 1.38e-03 8.43e-03 2.42e-01 2.87e-02 0.00e+00   ph/cm2/s
              Error 2.88e-02 3.11e-02 4.82e-01 9.08e-02 0.00e+00 0.00e+00   ph/cm2/s
 
Fluence        Band 2.19e-12 9.83e-12 8.69e-11 1.56e-07 1.05e-09 0.00e+00   erg/cm2
              Error 1.75e-09 2.57e-07 4.43e-09 0.00e+00 0.00e+00 0.00e+00   erg/cm2
Peak flux      Band 4.52e-05 5.08e-04 2.72e-03 8.76e-01 1.37e-02 0.00e+00   ph/cm2/s
              Error 1.44e+00 8.75e-02 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    1.500    6.500    -      -           0.00e+00 8.42e-04   53.763 57
CPL   1.000    6.500      50.0 5000.0      0.00e+00 5.00e+23   53.763 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.500    6.500    -      -           0.00e+00 8.42e-04   53.763 57
CPL   1.000    6.500      50.0 5000.0      0.00e+00 5.00e+23   53.763 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    0.384    0.000    0.384
T90     0.384    0.000    0.384
T50     0.384    0.000    0.384
Peak    0.384    0.000    0.384

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
  228.7551 +51.0180 0.6678   34.2  -14.5       0.0018     0.3  TRIG_00276045       
------------------------------------------
 
Foreground time interval of the image:
 -0.032   0.352 (delta_t =   0.384 [sec])
Background time interval of the image:
-118.720  -6.720 (delta_t = 112.000 [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   -0.032 sec. to    0.352 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50000     ( -4.50000   8.50000 )
Norm@50keV  : 0.00000    ( 0.00000   1.684061E-03) )
------------------------------------------------------------
 Chi-Squared =      53.76252     using    59 PHA bins.
 Reduced chi-squared =     0.9432020     for     57 degrees of freedom
 Null hypothesis probability = 0.597
 
Photon flux (15-150 keV)    in 0.3840 sec: 2.903437E-02 ( -0.0290344  0.153175 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90359e-09 ( -1.90359e-09  6.70502e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.032 sec. to    0.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     ( -4.00000   9.00000 )
Epeak [keV] : 50.0000      ( -49.9900 9950.00 )
Norm@50keV  : 0.00000    ( 0.00000   1.000000E+24) )
------------------------------------------------------------
 Chi-Squared =      53.76252     using    59 PHA bins.
 Reduced chi-squared =     0.9600449     for     56 degrees of freedom
 Null hypothesis probability = 0.560
 
Photon flux (15-150 keV)    in 0.3840 sec: 2.866750E-02 ( -0.0286675  0.15288 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.87112e-09 ( -1.87112e-09  6.94756e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.032 sec. to    0.352 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.983950   ( -9.01605   5.98395 )
beta        : -2.50000    ( -7.50000   12.5000 )
Epeak [keV] : 80.0000      ( -79.9000 9920.00 )
Norm@50keV   : 0.00000    ( -1.644992E-02   8.689456E-02) )
------------------------------------------------------------
 Chi-Squared =      53.76252     using    59 PHA bins.
 Reduced chi-squared =     0.9775003     for     55 degrees of freedom
 Null hypothesis probability = 0.522
 
Photon flux (15-150 keV)    in 0.3840 sec: 1.367009E-02 ( -0.0136701  0.161259 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05494e-09 ( -1.05494e-09  7.80465e-09 ) ergs/cm2
 

Peak spectrum fit using the pre-slew DRM

Power-law model
Time interval is from   -0.032 sec. to    0.352 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.50000     ( -4.50000   8.50000 )
Norm@50keV  : 0.00000    ( 0.00000   1.684061E-03) )
------------------------------------------------------------
 Chi-Squared =      53.76252     using    59 PHA bins.
 Reduced chi-squared =     0.9432020     for     57 degrees of freedom
 Null hypothesis probability = 0.597
 
Photon flux (15-150 keV)    in 0.3840 sec: 2.903437E-02 ( -0.0290344  0.153175 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.90359e-09 ( -1.90359e-09  6.70502e-09 ) ergs/cm2
 
Cutoff power-law model
Time interval is from   -0.032 sec. to    0.352 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00000     ( -4.00000   9.00000 )
Epeak [keV] : 50.0000      ( -49.9900 9950.00 )
Norm@50keV  : 0.00000    ( 0.00000   1.000000E+24) )
------------------------------------------------------------
 Chi-Squared =      53.76252     using    59 PHA bins.
 Reduced chi-squared =     0.9600449     for     56 degrees of freedom
 Null hypothesis probability = 0.560
 
Photon flux (15-150 keV)    in 0.3840 sec: 2.866750E-02 ( -0.0286675  0.15288 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.87112e-09 ( -1.87112e-09  6.94756e-09 ) ergs/cm2
 
Band function
Time interval is from   -0.032 sec. to    0.352 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.983950   ( -9.01605   5.98395 )
beta        : -2.50000    ( -7.50000   12.5000 )
Epeak [keV] : 80.0000      ( -79.9000 9920.00 )
Norm@50keV   : 0.00000    ( -1.644992E-02   8.689456E-02) )
------------------------------------------------------------
 Chi-Squared =      53.76252     using    59 PHA bins.
 Reduced chi-squared =     0.9775003     for     55 degrees of freedom
 Null hypothesis probability = 0.522
 
Photon flux (15-150 keV)    in 0.3840 sec: 1.367009E-02 ( -0.0136701  0.161259 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05494e-09 ( -1.05494e-09  7.80465e-09 ) ergs/cm2
 
Plot creation:
Thu Dec 13 17:56:44 EST 2007