batgrbproduct analysis for trigger=339162

batgrbproduct Analysis for Trigger=339162

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 v2.42
    Process Start Time (local time): Sun Jan  4 22:49:55 EST 2009
             Host Name: gcn5
   Current Working Dir: /local/data/raid2/prebascript/trigger339162/GCN5_download_cron
======================================================================

  Trigger: 00339162      Segment: 000

  BAT Trigger Time: 252769064   [s; MET]
      Trigger Stop: 252769128   [s; MET]
               UTC: 2009-01-04T13:37:39.611000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 170.255584719586   Dec: -61.9181717872455  [deg; J2000]

     Catalogged Source?: YES
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    11.99
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    11.99

  Flight Position:   [ source = BAT ]
    RA: 170.255584719586   Dec: -61.9181717872455  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 170.243013909963   Dec: -61.9372928808152  [deg; J2000]  
        { 11h 20m 58.3s , -61d 56' 14.3" }
         +/- 2.72835984857902 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.41976127666482 [arcmin] (formal 1-sigma fit error)
    SNR: 7.25106398698254
 
  Angular difference between Flight and Ground position is 1.200916 arcmin
 
  Partial Coding Fraction: 1.015625    [ including projection effects ]

  Duration
     T90: 71.5760000348091 +/- 13.747177754148
        Measured from: 22.3320000767708
                   to: 93.9080001115799     [s; relative to TRIGTIME]
     T50: 26.8640000224113 +/- 13.4325111453045
        Measured from: 48.2640000879765
                   to: 75.1280001103878     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 72.9120000004768     
                   to: 73.9120000004768     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 19.2039999961853     
                   to: 98.3400000035763     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.681796   0.466075   0.077537   0.111750
           0.047250   0.048157   0.044587   0.044773 [error]
 Peak      0.021947   0.001559   0.014174   0.012279
           0.005308   0.005421   0.005111   0.005079 [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 1.86e-07 1.81e-07 1.23e-07 1.31e-07 5.43e-07 6.22e-07   erg/cm2
              Error 2.37e-08 2.38e-08 3.33e-08 6.55e-08 7.77e-08 1.16e-07   erg/cm2
Peak flux Power-law 1.36e-01 9.93e-02 4.81e-02 3.30e-02 2.99e-01 3.17e-01   ph/cm2/s
              Error 1.08e-01 4.97e-02 4.91e-02 7.79e-02 1.23e-01 1.46e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.85e-07 1.97e-07 7.71e-08 8.80e-09 4.66e-07 4.67e-07   erg/cm2
              Error 2.51e-08 2.97e-08 5.09e-08 4.62e-08 8.79e-08 1.26e-07   erg/cm2
Peak flux Cutoff-PL 1.36e-01 9.93e-02 4.80e-02 3.26e-02 2.99e-01 3.16e-01   ph/cm2/s
              Error 1.08e-01 4.98e-02 4.91e-02 7.73e-02 1.23e-01 1.45e-01   ph/cm2/s
 
Fluence        Band 1.89e-07 1.85e-07 1.02e-07 8.31e-08 5.16e-07 5.64e-07   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 1.29e-01 9.91e-02 5.07e-02 3.72e-02 2.97e-01 3.34e-01   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    2.557    0.251    -      -           6.76e-04 1.34e-04   69.900 57
CPL   1.256    1.214      17.4    0.0      5.33e-03 0.00e+00   67.320 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.041    1.359    -      -           1.95e-03 1.62e-03   54.800 57
CPL   3.424    0.000     379.4    0.0      4.11e-04 0.00e+00   52.760 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   79.136   19.204   98.340
T90    71.576   22.332   93.908
T50    26.864   48.264   75.128
Peak    1.000   72.912   73.912

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
  170.2430 -61.9373 0.0266    4.9 -103.8       0.8088     7.3  TRIG_00339162       
------------------------------------------
 
Foreground time interval of the image:
 19.204  98.340 (delta_t =  79.136 [sec])
Background time interval of the image:
-134.899  19.204 (delta_t = 154.103 [sec])

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)

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   19.204 sec. to   98.340 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.55687     ( -0.240343   0.260989 )
Norm@50keV  : 6.75690E-04    ( -0.000133121   0.00013553 )
------------------------------------------------------------
# Chi-Squared =          69.90 using 59 PHA bins.
# Reduced chi-squared =          1.226 for     57 degrees of freedom 
# Null hypothesis probability =   1.172049e-01
 
Photon flux (15-150 keV)    in 79.14 sec: 0.137500 ( -0.0147017  0.0147114 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.43324e-07 ( -7.56356e-08  7.98206e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   19.204 sec. to   98.340 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25605     ( -1.67039   0.757096 )
Epeak [keV] : 17.4346      (   )
Norm@50keV  : 5.32975E-03    (     )
------------------------------------------------------------
# Chi-Squared =          67.32 using 59 PHA bins.
# Reduced chi-squared =          1.202 for     56 degrees of freedom 
# Null hypothesis probability =   1.430217e-01
 
Photon flux (15-150 keV)    in 79.14 sec: 0.132334 ( -0.014734  0.0148 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.66489e-07 ( -7.1408e-08  1.04375e-07 ) ergs/cm2

Band function

Time interval is from   19.204 sec. to   98.340 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99772   ( -851.26   -842.236 )
beta        : -2.89641    ( -0.570556   0.335086 )
Epeak [keV] : 19.9013      ( -3.08152 2.62145 )
Norm@50keV   : 896.720    ( -521.757   1987.84 )
------------------------------------------------------------
# Chi-Squared =          64.12 using 59 PHA bins.
# Reduced chi-squared =          1.166 for     55 degrees of freedom 
# Null hypothesis probability =   1.870717e-01
 
Photon flux (15-150 keV)    in 79.14 sec: 0.137284 ( -0.014414  0.014662 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.15739e-07 ( -9.35815e-08  8.86487e-08 ) ergs/cm2

Peak spectrum fit

Power-law model

Time interval is from   72.912 sec. to   73.912 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.04081     ( -1.03463   1.68312 )
Norm@50keV  : 1.95249E-03    ( -0.00195147   0.00127889 )
------------------------------------------------------------
# Chi-Squared =          54.80 using 59 PHA bins.
# Reduced chi-squared =         0.9614 for     57 degrees of freedom 
# Null hypothesis probability =   5.581493e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.299058 ( -0.124401  0.122439 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.8046e-08 ( -1.8046e-08  1.30241e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   72.912 sec. to   73.912 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 3.42362     (     )
Epeak [keV] : 379.411      (   )
Norm@50keV  : 4.10635E-04    (     )
------------------------------------------------------------
# Chi-Squared =          52.76 using 59 PHA bins.
# Reduced chi-squared =         0.9421 for     56 degrees of freedom 
# Null hypothesis probability =   5.984271e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.298854 ( -0.124439  0.122419 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.80271e-08 ( -1.80271e-08  1.30311e-08 ) ergs/cm2

Band function

Time interval is from   72.912 sec. to   73.912 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.43830   ( 1.44477   1.44477 )
beta        : -2.01077    ( 2.02444   1.01449 )
Epeak [keV] : 14.0131      ( -12.4818 -12.4818 )
Norm@50keV   : 7.23804E-03    ( -0.00833428   17.9425 )
------------------------------------------------------------
# Chi-Squared =          54.80 using 59 PHA bins.
# Reduced chi-squared =         0.9964 for     55 degrees of freedom 
# Null hypothesis probability =   4.821899e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.296674 ( -0.120921  0.12106 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.86643e-08 ( -1.86643e-08  8.0873e-09 ) 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: 2.55687     ( -0.240343   0.260989 )
Norm@50keV  : 6.75690E-04    ( -0.000133121   0.00013553 )
------------------------------------------------------------
# Chi-Squared =          69.90 using 59 PHA bins.
# Reduced chi-squared =          1.226 for     57 degrees of freedom 
# Null hypothesis probability =   1.172049e-01
 
Photon flux (15-150 keV)    in 79.14 sec: 0.137500 ( -0.0147017  0.0147114 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.43324e-07 ( -7.56356e-08  7.98206e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.25605     ( -1.67039   0.757096 )
Epeak [keV] : 17.4346      (   )
Norm@50keV  : 5.32975E-03    (     )
------------------------------------------------------------
# Chi-Squared =          67.32 using 59 PHA bins.
# Reduced chi-squared =          1.202 for     56 degrees of freedom 
# Null hypothesis probability =   1.430217e-01
 
Photon flux (15-150 keV)    in 79.14 sec: 0.132334 ( -0.014734  0.0148 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.66489e-07 ( -7.1408e-08  1.04375e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.99772   ( -851.267   -842.236 )
beta        : -2.89641    ( -0.570556   0.335086 )
Epeak [keV] : 19.9013      ( -3.08152 2.62145 )
Norm@50keV   : 896.720    ( -521.757   1987.84 )
------------------------------------------------------------
# Chi-Squared =          64.12 using 59 PHA bins.
# Reduced chi-squared =          1.166 for     55 degrees of freedom 
# Null hypothesis probability =   1.870717e-01
 
Photon flux (15-150 keV)    in 79.14 sec: 0.137284 ( -0.014414  0.014662 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.15739e-07 ( -9.35815e-08  8.86487e-08 ) ergs/cm2

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

S(25-50 keV)  = 1.81168e-07
S(50-100 keV) = 1.23153e-07

T90 vs. Hardness ratio plot

T90                                   = 71.5760000348091 sec.
Hardness ratio (energy fluence ratio) = 0.679772

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.683599
Count Ratio (50-100 keV) / (15-25 keV) = 0.113725

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:
-134.899400 19.204000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6127 -40.5617    2.3  24.9   83.8   1.0842   5.1    3.9	Vela X-1                      
170.0969 -60.7156    3.0   4.5 -117.8   0.5187   3.8    8.5	Cen X-3                       
186.3090 -62.7640    3.9  12.4 -109.7   0.3988   3.0    9.6	GX 301-2                      
 87.7058 -43.2193    2.9  45.9   31.6   1.7168   4.0 ------	UNKNOWN                       
170.3246 -61.9048    1.7   5.0 -104.3   0.9123   6.7 ------	UNKNOWN

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

Time interval of the image:
19.204000 98.340000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6910 -40.4972    5.5  24.9   84.0  -0.3628  -2.1    8.2	Vela X-1                      
170.3851 -60.4612    5.1   4.6 -121.2   0.2515   2.2    9.9	Cen X-3                       
186.5751 -62.9140    5.6  12.5 -109.1  -0.2534  -2.0    8.9	GX 301-2                      
170.2428 -61.9373    1.6   4.9 -103.8   0.8090   7.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
481.200590 963.073900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']

Plot creation:
Wed Feb 17 00:49:01 EST 2010