batgrbproduct analysis for trigger=373684

batgrbproduct Analysis for Trigger=373684

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
3) This page will be updated for up to 8 downlinks after the trigger.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.45
    Process Start Time (local time): Sat Oct 24 18:15:10 EDT 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger373684/GCN5_download_cron
======================================================================

  Trigger: 00373684      Segment: 000

  BAT Trigger Time: 278078784   [s; MET]
      Trigger Stop: 278078848   [s; MET]
               UTC: 2009-10-24T12:06:18.800960    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 82.9876417073749   Dec: 20.6388373278359  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    19.94
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    19.94

  Flight Position:   [ source = BAT ]
    RA: 82.9876417073749   Dec: 20.6388373278359  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 82.9783570083345   Dec: 20.6242841688984  [deg; J2000]  
        { 05h 31m 54.8s , +20d 37' 27.4" }
         +/- 1.09095092249985 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.356700442262629 [arcmin] (formal 1-sigma fit error)
    SNR: 26.8603044938248
 
  Angular difference between Flight and Ground position is 1.016991 arcmin
 
  Partial Coding Fraction: 0.703125    [ including projection effects ]

  Duration
     T90: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]
     T50: 64 +/- 
        Measured from: 0
                   to: 64     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 64 second)
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 64     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.076396   0.964682   0.503952   0.105377
           0.047634   0.048885   0.043029   0.038594 [error]
 Peak      1.076396   0.964682   0.503952   0.105377
           0.047634   0.048885   0.043029   0.038594 [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 3.17e-07 4.18e-07 4.04e-07 6.98e-07 1.37e-06 1.84e-06   erg/cm2
              Error 2.95e-08 2.44e-08 4.31e-08 1.53e-07 9.47e-08 1.94e-07   erg/cm2
Peak flux Power-law 1.60e-01 1.18e-01 5.74e-02 3.97e-02 3.54e-01 3.75e-01   ph/cm2/s
              Error 1.07e-02 6.06e-03 5.59e-03 7.14e-03 1.76e-02 1.96e-02   ph/cm2/s
 
Fluence   Cutoff-PL 3.14e-07 4.17e-07 4.05e-07 6.98e-07 1.37e-06 1.83e-06   erg/cm2
              Error 2.96e-08 2.45e-08 4.36e-08 1.54e-07 9.54e-08 1.95e-07   erg/cm2
Peak flux Cutoff-PL 1.60e-01 1.18e-01 5.73e-02 3.94e-02 3.54e-01 3.75e-01   ph/cm2/s
              Error 1.07e-02 6.06e-03 5.59e-03 7.09e-03 1.76e-02 1.95e-02   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    2.047    0.125    -      -           2.31e-03 1.72e-04   57.880 57
CPL   1.998    0.000       2.3    0.0      2.42e-03 0.00e+00   58.130 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.036    0.101    -      -           2.32e-03 1.69e-04   59.240 57
CPL   2.099    0.211      60.4    0.0      2.12e-03 0.00e+00   59.010 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   64.000    0.000   64.000
T90    64.000    0.000   64.000
T50    64.000    0.000   64.000
Peak   64.000    0.000   64.000

Click here for the BAT GCN circular template

Image

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

#   RAcent  DECcent POSerr  Theta    Phi     Peak Cts     SNR  Name
   82.9784 +20.6243 0.0072   21.0  117.5       2.6913    26.9  TRIG_00373684       
------------------------------------------
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [sec])
Background time interval of the image:

Lightcurves

Notes:

1) All plots contain as much data as has been downloaded to date.
2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
5) Time of each bin is in the middle of the bin.

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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

8 ms binning

From T100_start-3 s to T100_start+3 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

2 ms binning

From T100_start-1 s to T100_start+1 s

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

SN=5 or 10 sec. binning (whichever binning is satisfied first)

SN=5 or 10 sec. binning (T < 200 sec)

Flight mask-tagged light curves

Caution: Mask-weight map is always using the same on-axis map

Quad-rate summed light curves (from T0-300 to T0+1000)

Spectra

Notes:

1) The fitting includes the systematic errors.
2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.

Time averaged spectrum fit using the pre-slew DRM

Power-law model

Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.04734     ( -0.12365   0.127225 )
Norm@50keV  : 2.31263E-03    ( -0.000173804   0.000170923 )
------------------------------------------------------------
# Chi-Squared =          57.88 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     57 degrees of freedom 
# Null hypothesis probability =   4.425262e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.354665 ( -0.0212138  0.0212608 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.369e-06 ( -9.40269e-08  9.52896e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99842     (     )
Epeak [keV] : 2.26361      (   )
Norm@50keV  : 2.42037E-03    (     )
------------------------------------------------------------
# Chi-Squared =          58.13 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     56 degrees of freedom 
# Null hypothesis probability =   3.968744e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.352875 ( -0.021291  0.021339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36655e-06 ( -9.4784e-08  9.60704e-08 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.52188   ( 1.52102   1.52102 )
beta        : -2.05079    ( 2.05229   0.128064 )
Epeak [keV] : 17.0924      ( -17.8875 82.6889 )
Norm@50keV   : 6.55580E-03    ( -0.00648055   8.82611 )
------------------------------------------------------------
# Chi-Squared =          57.86 using 59 PHA bins.
# Reduced chi-squared =          1.052 for     55 degrees of freedom 
# Null hypothesis probability =   3.700963e-01
 
Photon flux (15-150 keV)    in 64 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Peak spectrum fit

Power-law model

Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.03583     ( -0.09904   0.10254 )
Norm@50keV  : 2.32033E-03    ( -0.00016977   0.000167445 )
------------------------------------------------------------
# Chi-Squared =          59.24 using 59 PHA bins.
# Reduced chi-squared =          1.039 for     57 degrees of freedom 
# Null hypothesis probability =   3.936862e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.353910 ( -0.0176244  0.0176285 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37244e-06 ( -9.23034e-08  9.36909e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.09867     ( -0.322906   0.0989541 )
Epeak [keV] : 60.4284      (   )
Norm@50keV  : 2.11781E-03    (     )
------------------------------------------------------------
# Chi-Squared =          59.01 using 59 PHA bins.
# Reduced chi-squared =          1.054 for     56 degrees of freedom 
# Null hypothesis probability =   3.660632e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.353795 ( -0.017619  0.017623 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37225e-06 ( -9.23008e-08  9.36832e-08 ) ergs/cm2

Band function

Time interval is from    0.000 sec. to   64.000 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.40001   ( 1.40001   1.40001 )
beta        : -2.05212    ( -0.182043   0.112742 )
Epeak [keV] : 19.7159      ( -19.7159 -19.7159 )
Norm@50keV   : 7.72015E-03    ( -0.00772015   152.961 )
------------------------------------------------------------
# Chi-Squared =          59.12 using 59 PHA bins.
# Reduced chi-squared =          1.075 for     55 degrees of freedom 
# Null hypothesis probability =   3.275643e-01
 
Photon flux (15-150 keV)    in 64 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)

Power-law model

 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.04734     ( -0.12365   0.127225 )
Norm@50keV  : 2.31263E-03    ( -0.000173804   0.000170923 )
------------------------------------------------------------
# Chi-Squared =          57.88 using 59 PHA bins.
# Reduced chi-squared =          1.015 for     57 degrees of freedom 
# Null hypothesis probability =   4.425262e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.354665 ( -0.0212138  0.0212608 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.369e-06 ( -9.40269e-08  9.52896e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.99842     (     )
Epeak [keV] : 2.26361      (   )
Norm@50keV  : 2.42037E-03    (     )
------------------------------------------------------------
# Chi-Squared =          58.13 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     56 degrees of freedom 
# Null hypothesis probability =   3.968744e-01
 
Photon flux (15-150 keV)    in 64 sec: 0.352875 ( -0.021291  0.021339 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.36655e-06 ( -9.4784e-08  9.60704e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.52188   ( 1.52102   1.52102 )
beta        : -2.05079    ( 2.05229   0.128064 )
Epeak [keV] : 17.0924      ( -17.8875 82.6889 )
Norm@50keV   : 6.55580E-03    ( -0.00648055   8.82611 )
------------------------------------------------------------
# Chi-Squared =          57.86 using 59 PHA bins.
# Reduced chi-squared =          1.052 for     55 degrees of freedom 
# Null hypothesis probability =   3.700963e-01
 
Photon flux (15-150 keV)    in 64 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 4.17695e-07
S(50-100 keV) = 4.0421e-07

T90 vs. Hardness ratio plot

T90                                   = 64 sec.
Hardness ratio (energy fluence ratio) = 0.967716

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.896215
Count Ratio (50-100 keV) / (15-25 keV) = 0.468185

Mask shadow pattern

IMX = 0, IMY = 0

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

Time interval of the image:

Pre-slew background subtracted image of 15-350 keV band

Time interval of the image:
0.000000 64.000000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.8211  22.0793    4.7  21.4  121.9  -0.2418  -2.4   11.2	Crab                          
 71.3094  36.5246    2.1  39.4  126.0   1.2376   5.4 ------	UNKNOWN                       
 82.9783  20.6243    0.4  21.0  117.5   2.6913  27.1 ------	UNKNOWN                       
105.6856  53.5095    2.7  48.1  167.0   0.9796   4.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
120.700590 303.089400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.5486  21.8817    4.2   1.3 -156.9   0.4778   2.8    9.3	Crab                          
 50.3650 -13.6687    2.7  47.0   46.7   3.3083   4.2 ------	UNKNOWN                       
 44.0499  62.2593    2.4  49.4  158.3   2.4876   4.7 ------	UNKNOWN                       
 69.6274  29.7760    3.0  15.1  130.7   0.6430   3.9 ------	UNKNOWN                       
 82.9320  20.6077    0.2   0.1   69.2   7.8766  46.6 ------	UNKNOWN                       
 86.6667  10.3255    3.2  10.9  -18.5   0.5865   3.6 ------	UNKNOWN                       
120.9571  76.0184    2.5  58.7 -169.0   4.6659   4.7 ------	UNKNOWN                       
117.0085  12.9691    2.1  33.4  -81.3   1.7446   5.5 ------	UNKNOWN

Plot creation:
Mon Feb 15 16:28:14 EST 2010