batgrbproduct analysis for trigger=424040

batgrbproduct Analysis for Trigger=424040

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 v2.46
    Process Start Time (local time): Mon Jun  7 13:01:29 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger424040/GCN5_download_cron
======================================================================

  Trigger: 00424040      Segment: 000

  BAT Trigger Time: 297554321.984   [s; MET]
      Trigger Stop: 297554323.008   [s; MET]
               UTC: 2010-06-06T21:58:36.115640    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 178.251592004387   Dec: 22.332343507047  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.52
     Image Trigger?:     NO
     Rate S/N Ratio:     19.3390796058137  [ if not an image trigger ]
     Image S/N Ratio:    6.52

  Flight Position:   [ source = BAT ]
    RA: 178.251592004387   Dec: 22.332343507047  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 178.250882041684   Dec: 22.4541996173604  [deg; J2000]  
        { 11h 53m 00.2s , +22d 27' 15.1" }
         +/- 4.00671881409551 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.25806766687295 [arcmin] (formal 1-sigma fit error)
    SNR: 4.18785300621236
 
  Angular difference between Flight and Ground position is 7.311473 arcmin
 
  Partial Coding Fraction: 0.890625    [ 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: 2.98023223876953e-08     
                   to: 1.02400001883507     [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     0.000033   0.008927   0.024392   0.045237
           0.007672   0.009028   0.008936   0.010924 [error]
 Peak      0.000033   0.008927   0.024392   0.045237
           0.007672   0.009028   0.008936   0.010924 [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 5.89e-11 8.46e-10 1.12e-08 1.27e-06 5.48e-08 1.29e-06   erg/cm2
              Error 4.90e-10 2.50e-09 1.10e-08 4.86e-07 3.44e-08 4.92e-07   erg/cm2
Peak flux Power-law 1.74e-03 1.30e-02 8.58e-02 2.97e+00 3.05e-01 3.07e+00   ph/cm2/s
              Error 1.48e-02 4.20e-02 8.85e-02 1.15e+00 2.25e-01 1.21e+00   ph/cm2/s
 
Fluence   Cutoff-PL 4.10e-11 6.70e-10 1.01e-08 1.44e-06 5.31e-08 1.45e-06   erg/cm2
              Error 4.52e-10 2.49e-09 1.09e-08 5.53e-07 3.44e-08 5.59e-07   erg/cm2
Peak flux Cutoff-PL 1.20e-03 1.02e-02 7.73e-02 3.32e+00 2.90e-01 3.41e+00   ph/cm2/s
              Error 1.36e-02 4.01e-02 8.79e-02 1.30e+00 2.23e-01 1.35e+00   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   -1.593    1.008    -      -           1.03e-03 1.84e-03   46.080 57
CPL  -3.881    0.000    5182.0 -148.3      8.73e-05 0.00e+00   44.760 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -1.596    1.004    -      -           1.03e-03 1.83e-03   46.320 57
CPL  -2.614    1.585    10000.0    0.0      3.47e-04 1.59e-03   45.520 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

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
  178.2509 +22.4542 0.0459   24.8  174.9       0.0773     4.2  TRIG_00424040       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-60.984 -17.200 (delta_t =  43.784 [sec])
-15.984  -9.984 (delta_t =   6.000 [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

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)

The mask-weighted light curves based on cleaned DPHs

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    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.59255     ( -0.55971   1.45655 )
Norm@50keV  : 1.02942E-03    ( -0.00100749   0.00266263 )
------------------------------------------------------------
# Chi-Squared =          46.08 using 59 PHA bins.
# Reduced chi-squared =         0.8085 for     57 degrees of freedom 
# Null hypothesis probability =   8.491164e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.303930 ( -0.184423  0.265499 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.48017e-08 ( -3.25301e-08  3.62673e-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: -3.88142     (     )
Epeak [keV] : 5182.03      ( -704.746 -1001.43 )
Norm@50keV  : 8.72832E-05    (     )
------------------------------------------------------------
# Chi-Squared =          44.76 using 59 PHA bins.
# Reduced chi-squared =         0.7992 for     56 degrees of freedom 
# Null hypothesis probability =   8.596819e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.289325 ( -0.173486  0.272285 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.31097e-08 ( -3.12233e-08  3.75554e-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       : 1.75479   ( -1.75351   -1.75351 )
beta        : 1.72538    ( -1.55808   0.426721 )
Epeak [keV] : 15.4472      ( -15.4519 -15.4519 )
Norm@50keV   : 2.73927E-03    ( 26.3199   -0.00274237 )
------------------------------------------------------------
# Chi-Squared =          45.98 using 59 PHA bins.
# Reduced chi-squared =         0.8360 for     55 degrees of freedom 
# Null hypothesis probability =   8.016151e-01
 
Photon flux (15-150 keV)    in 1.024 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 199.363  (-200  -200)
R^2/D10^2   : 2.54292E-04  (-8.69352e-05   0.00156865)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          47.41 using 59 PHA bins.
# Reduced chi-squared =         0.8318 for     57 degrees of freedom 
# Null hypothesis probability =   8.134173e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.333e-10   6.011e-11
25- 50  2.832e-09   7.096e-10
50-150  6.895e-08   9.201e-09
15-150  7.211e-08   2.227e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 1.26317       (      )
Norm        : 5.83857E+04       (     )
------------------------------------------------------------
# Chi-Squared =          70.00 using 59 PHA bins.
# Reduced chi-squared =          1.228 for     57 degrees of freedom 
# Null hypothesis probability =   1.157128e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.577e-10   7.726e-11
25- 50  3.652e-12   3.153e-14
50-150  1.044e-17   5.740e-21
15-150  6.614e-10   1.960e-11

Double BB

R1^2/D10^2  : 2.90781E+04        (      )
kT2 [keV]   : 199.363        (-200      -200)
R2^2/D10^2  : 2.53493E-04    (-8.6876e-05   0.000905835)
------------------------------------------------------------
# Chi-Squared =          47.70 using 59 PHA bins.
# Chi-Squared =          47.18 using 59 PHA bins.
# Chi-Squared =          47.00 using 59 PHA bins.
# Reduced chi-squared =         0.8673 for     55 degrees of freedom 
# Reduced chi-squared =         0.8578 for     55 degrees of freedom 
# Reduced chi-squared =         0.8545 for     55 degrees of freedom 
# Null hypothesis probability =   7.470064e-01
# Null hypothesis probability =   7.642828e-01
# Null hypothesis probability =   7.700900e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

Peak spectrum fit

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: -1.59625     ( -0.554317   1.45425 )
Norm@50keV  : 1.02732E-03    ( -0.00100577   0.00266307 )
------------------------------------------------------------
# Chi-Squared =          46.32 using 59 PHA bins.
# Reduced chi-squared =         0.8127 for     57 degrees of freedom 
# Null hypothesis probability =   8.429564e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.304788 ( -0.18428  0.265624 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.49587e-08 ( -3.25022e-08  3.62885e-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: -2.61396     ( -2.04672   1.12253 )
Epeak [keV] : 10000.00      (   )
Norm@50keV  : 3.47371E-04    ( -0.000347403   0.00283714 )
------------------------------------------------------------
# Chi-Squared =          45.52 using 59 PHA bins.
# Reduced chi-squared =         0.8128 for     56 degrees of freedom 
# Null hypothesis probability =   8.403825e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.290110 ( -0.173321  0.272426 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.32537e-08 ( -3.11896e-08  3.75825e-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       : 2.63329   ( -1.82908   -1.82908 )
beta        : -2.42006    ( -1.55157   0.424896 )
Epeak [keV] : 9972.23      ( -1148.4 -1148.4 )
Norm@50keV   : 3.44722E-04    ( -0.000345113   0.00492293 )
------------------------------------------------------------
# Chi-Squared =          45.49 using 59 PHA bins.
# Reduced chi-squared =         0.8272 for     55 degrees of freedom 
# Null hypothesis probability =   8.159352e-01
 
Photon flux (15-150 keV)    in 1.024 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 199.314  (  )
R^2/D10^2   : 2.53824E-04  (-8.68662e-05   0.00155453)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          47.67 using 59 PHA bins.
# Reduced chi-squared =         0.8363 for     57 degrees of freedom 
# Null hypothesis probability =   8.060597e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.461e-10   4.177e-10
25- 50  2.919e-09   3.159e-09
50-150  6.898e-08   4.998e-08
15-150  7.224e-08   5.402e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 1.26541       (      )
Norm        : 5.73480E+04       (     )
------------------------------------------------------------
# Chi-Squared =          70.44 using 59 PHA bins.
# Reduced chi-squared =          1.236 for     57 degrees of freedom 
# Null hypothesis probability =   1.087549e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.618e-10   6.072e-11
25- 50  3.707e-12   2.209e-14
50-150  1.082e-17   7.962e-21
15-150  6.655e-10   2.976e-11

Double BB

R1^2/D10^2  : 9248.15        (      )
kT2 [keV]   : 199.363        (-200      -200)
R2^2/D10^2  : 2.54486E-04    (-8.68614e-05   0.00127764)
------------------------------------------------------------
# Chi-Squared =          47.95 using 59 PHA bins.
# Chi-Squared =          47.44 using 59 PHA bins.
# Chi-Squared =          47.27 using 59 PHA bins.
# Reduced chi-squared =         0.8719 for     55 degrees of freedom 
# Reduced chi-squared =         0.8626 for     55 degrees of freedom 
# Reduced chi-squared =         0.8595 for     55 degrees of freedom 
# Null hypothesis probability =   7.384090e-01
# Null hypothesis probability =   7.556322e-01
# Null hypothesis probability =   7.611993e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  0.000e+00   0.000e+00
25- 50  0.000e+00   0.000e+00
50-150  0.000e+00   0.000e+00
15-150  0.000e+00   0.000e+00

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: -1.59255     ( -0.55971   1.45655 )
Norm@50keV  : 1.02942E-03    ( -0.00100749   0.00266263 )
------------------------------------------------------------
# Chi-Squared =          46.08 using 59 PHA bins.
# Reduced chi-squared =         0.8085 for     57 degrees of freedom 
# Null hypothesis probability =   8.491164e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.303930 ( -0.184423  0.265499 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.48017e-08 ( -3.25301e-08  3.62673e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -3.88142     (     )
Epeak [keV] : 5182.03      ( -704.638 -1001.43 )
Norm@50keV  : 8.72832E-05    (     )
------------------------------------------------------------
# Chi-Squared =          44.76 using 59 PHA bins.
# Reduced chi-squared =         0.7992 for     56 degrees of freedom 
# Null hypothesis probability =   8.596819e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.289325 ( -0.173486  0.272285 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.31097e-08 ( -3.12233e-08  3.75554e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.75479   ( -1.75351   -1.75351 )
beta        : 1.72538    ( -1.55808   0.426721 )
Epeak [keV] : 15.4472      ( -15.4519 -15.4519 )
Norm@50keV   : 2.73927E-03    ( 26.3199   -0.00274237 )
------------------------------------------------------------
# Chi-Squared =          45.98 using 59 PHA bins.
# Reduced chi-squared =         0.8360 for     55 degrees of freedom 
# Null hypothesis probability =   8.016151e-01
 
Photon flux (15-150 keV)    in 1.024 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)  = 8.46323e-10
S(50-100 keV) = 1.11898e-08

T90 vs. Hardness ratio plot

T90                                   = 1.02399998903275 sec.
Hardness ratio (energy fluence ratio) = 13.2217

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 270.515
Count Ratio (50-100 keV) / (15-25 keV) = 739.152

Mask shadow pattern

IMX = -4.609975749493671E-01, IMY = -4.095322275569429E-02

TIME vs. PHA plot around the trigger time

TIME vs. DetID plot around the trigger time

100 us light curve (15-350 keV)

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:
-60.984000 -17.199800
-15.984000 -9.984000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
224.8299  33.2898    4.0  28.5   68.6   1.0024   2.9 ------	UNKNOWN                       
242.0123  68.9299    3.0  34.9   -4.6   0.9599   3.8 ------	UNKNOWN                       
169.8982  53.0750    3.0  15.8  -85.9   0.8752   3.8 ------	UNKNOWN

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

Time interval of the image:
0.000000 1.024000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
222.7338  58.7308    2.1  23.6    9.3   0.1037   5.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
65.716590 122.136000
240.016000 244.796000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
208.1620  17.4312    3.4  28.5   68.7   0.3139   3.4 ------	UNKNOWN                       
151.1496 -12.7866    2.3  44.0 -166.1   0.5094   5.0 ------	UNKNOWN

Plot creation:
Mon Jun  7 13:18:06 EDT 2010