batgrbproduct analysis for trigger=421072

batgrbproduct Analysis for Trigger=421072

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): Wed May  5 01:52:13 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger421072/GCN5_download_cron
======================================================================

  Trigger: 00421072      Segment: 000

  BAT Trigger Time: 294650920   [s; MET]
      Trigger Stop: 294650984   [s; MET]
               UTC: 2010-05-04T07:28:34.234040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 98.2463673293655   Dec: 9.16544017558485  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.4
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.4

  Flight Position:   [ source = BAT ]
    RA: 98.2463673293655   Dec: 9.16544017558485  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 98.2337818257669   Dec: 9.21066533321714  [deg; J2000]  
        { 06h 32m 56.1s , +09d 12' 38.4" }
         +/- 3.80879166987331 [arcmin] (estimated 90% radius based on SNR)
         +/- 2.17324470513808 [arcmin] (formal 1-sigma fit error)
    SNR: 4.50217480621853
 
  Angular difference between Flight and Ground position is 2.814039 arcmin
 
  Partial Coding Fraction: 1.015625    [ 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     0.244670   0.139848  -0.015560  -0.013073
           0.041391   0.042634   0.037601   0.033957 [error]
 Peak      0.244670   0.139848  -0.015560  -0.013073
           0.041391   0.042634   0.037601   0.033957 [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 5.78e-08 5.20e-08 3.22e-08 3.04e-08 1.55e-07 1.72e-07   erg/cm2
              Error 1.69e-08 1.99e-08 2.43e-08 4.79e-08 6.15e-08 8.79e-08   erg/cm2
Peak flux Power-law 3.03e-02 1.53e-02 4.74e-03 1.88e-03 5.13e-02 5.22e-02   ph/cm2/s
              Error 8.49e-03 5.47e-03 4.32e-03 2.68e-03 1.42e-02 1.48e-02   ph/cm2/s
 
Fluence   Cutoff-PL 6.52e-08 5.40e-08 2.75e-09 1.04e-12 1.22e-07 1.22e-07   erg/cm2
              Error 1.83e-08 2.31e-08 1.02e-08 2.38e-13 3.61e-08 3.61e-08   erg/cm2
Peak flux Cutoff-PL 3.37e-02 1.66e-02 4.49e-04 8.06e-08 5.07e-02 5.07e-02   ph/cm2/s
              Error 8.99e-03 5.47e-03 1.53e-03 5.54e-05 1.27e-02 1.27e-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    2.691    0.670    -      -           2.28e-04 1.83e-04   49.700 57
CPL  -4.910    0.000      22.8    3.9      1.34e+02 8.66e+01   44.980 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.687    0.643    -      -           2.32e-04 1.84e-04   50.790 57
CPL  -4.907    0.000      22.6    3.7      1.43e+02 9.17e+01   45.710 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
   98.2338  +9.2107 0.0430    2.3  146.0       0.3546     4.5  TRIG_00421072       
------------------------------------------
 
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)

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   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.69065     ( -0.586549   0.752511 )
Norm@50keV  : 2.28129E-04    ( -0.000228129   0.000137098 )
------------------------------------------------------------
# Chi-Squared =          49.70 using 59 PHA bins.
# Reduced chi-squared =         0.8720 for     57 degrees of freedom 
# Null hypothesis probability =   7.427164e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.06006E-02 ( -0.0143935  0.0145665 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54818e-07 ( -5.63731e-08  6.65402e-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: -4.91030     (     )
Epeak [keV] : 22.7877      ( -3.59239 4.13489 )
Norm@50keV  : 133.814    ( -133.814   39.3767 )
------------------------------------------------------------
# Chi-Squared =          44.98 using 59 PHA bins.
# Reduced chi-squared =         0.8033 for     56 degrees of freedom 
# Null hypothesis probability =   8.540754e-01
 
Photon flux (15-150 keV)    in 64 sec: 4.98444E-02 ( -0.0129426  0.0130298 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22034e-07 ( -3.50157e-08  3.72166e-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       : 4.38542   ( 1.31834   1.31834 )
beta        : -9.37167    ( 4.59225   14.1326 )
Epeak [keV] : 22.8144      ( -12.0863 96.9146 )
Norm@50keV   : 51.1677    ( -51.1778   18.6924 )
------------------------------------------------------------
# Chi-Squared =          45.07 using 59 PHA bins.
# Reduced chi-squared =         0.8195 for     55 degrees of freedom 
# Null hypothesis probability =   8.278900e-01
 
Photon flux (15-150 keV)    in 64 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]    : 5.56417  (-1.18838  1.48913)
R^2/D10^2   : 0.276200  (-0.276212   0.519318)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          45.83 using 59 PHA bins.
# Reduced chi-squared =         0.8040 for     57 degrees of freedom 
# Null hypothesis probability =   8.554060e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.472e-08   3.773e-08
25- 50  5.452e-08   3.475e-08
50-150  3.627e-09   3.306e-09
15-150  1.229e-07   7.482e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 19.8630       (-8.37781      18.4886)
Norm        : 0.622518       (-0.296022     0.607045)
------------------------------------------------------------
# Chi-Squared =          48.08 using 59 PHA bins.
# Reduced chi-squared =         0.8435 for     57 degrees of freedom 
# Null hypothesis probability =   7.939041e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.143e-08   3.043e-08
25- 50  5.351e-08   3.193e-08
50-150  1.584e-08   1.435e-08
15-150  1.308e-07   7.811e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.42427        (-1.18835      1.48916)
R1^2/D10^2  : 0.302567        (-0.276218      0.519289)
kT2 [keV]   : 199.363        (      )
R2^2/D10^2  : 3.46211E-06    (-3.4967e-06   -3.4967e-06)
------------------------------------------------------------
# Chi-Squared =          45.83 using 59 PHA bins.
# Chi-Squared =          44.62 using 59 PHA bins.
# Reduced chi-squared =         0.8333 for     55 degrees of freedom 
# Reduced chi-squared =         0.8113 for     55 degrees of freedom 
# Null hypothesis probability =   8.061056e-01
# Null hypothesis probability =   8.400960e-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   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.68683     ( -0.563105   0.72238 )
Norm@50keV  : 2.32086E-04    ( -0.000232086   0.000136195 )
------------------------------------------------------------
# Chi-Squared =          50.79 using 59 PHA bins.
# Reduced chi-squared =         0.8910 for     57 degrees of freedom 
# Null hypothesis probability =   7.059375e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.13486E-02 ( -0.0140926  0.0142931 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57293e-07 ( -5.59674e-08  6.61344e-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: -4.90682     (     )
Epeak [keV] : 22.6077      ( -3.4528 3.92293 )
Norm@50keV  : 143.213    ( -143.213   40.2606 )
------------------------------------------------------------
# Chi-Squared =          45.71 using 59 PHA bins.
# Reduced chi-squared =         0.8163 for     56 degrees of freedom 
# Null hypothesis probability =   8.351505e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.06995E-02 ( -0.0126467  0.0127421 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23668e-07 ( -3.44576e-08  3.64992e-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       : 4.25392   ( 1.43045   1.43045 )
beta        : -9.37167    ( 3.88676   13.0365 )
Epeak [keV] : 22.8262      ( -11.6899 11.1263 )
Norm@50keV   : 40.9922    ( -37.9314   33.5267 )
------------------------------------------------------------
# Chi-Squared =          45.84 using 59 PHA bins.
# Reduced chi-squared =         0.8335 for     55 degrees of freedom 
# Null hypothesis probability =   8.057832e-01
 
Photon flux (15-150 keV)    in 64 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]    : 5.52930  (-1.14778  1.41608)
R^2/D10^2   : 0.288632  (-0.288632   0.509325)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          46.61 using 59 PHA bins.
# Reduced chi-squared =         0.8178 for     57 degrees of freedom 
# Null hypothesis probability =   8.353519e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.609e-08   3.704e-08
25- 50  5.488e-08   3.491e-08
50-150  3.551e-09   3.296e-09
15-150  1.245e-07   7.389e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 19.8384       (-8.19513      17.3549)
Norm        : 0.632396       (-0.289609     0.580227)
------------------------------------------------------------
# Chi-Squared =          49.03 using 59 PHA bins.
# Reduced chi-squared =         0.8601 for     57 degrees of freedom 
# Null hypothesis probability =   7.647318e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.234e-08   3.191e-08
25- 50  5.425e-08   3.288e-08
50-150  1.603e-08   1.452e-08
15-150  1.326e-07   7.306e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.38846        (-1.11635      1.37869)
R1^2/D10^2  : 0.315424        (-0.234229      0.56338)
kT2 [keV]   : 198.199        (-199.956      -199.956)
R2^2/D10^2  : 3.67390E-06    (-3.61876e-06   0.606656)
------------------------------------------------------------
# Chi-Squared =          45.39 using 59 PHA bins.
# Reduced chi-squared =         0.8253 for     55 degrees of freedom 
# Null hypothesis probability =   8.188170e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.592e-08   3.728e-08
25- 50  5.385e-08   3.200e-08
50-150  6.474e-08   3.121e-09
15-150  1.845e-07   7.453e-08

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: 2.69065     ( -0.586549   0.752511 )
Norm@50keV  : 2.28129E-04    ( -0.000228129   0.000137098 )
------------------------------------------------------------
# Chi-Squared =          49.70 using 59 PHA bins.
# Reduced chi-squared =         0.8720 for     57 degrees of freedom 
# Null hypothesis probability =   7.427164e-01
 
Photon flux (15-150 keV)    in 64 sec: 5.06006E-02 ( -0.0143935  0.0145665 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54818e-07 ( -5.63731e-08  6.65402e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -4.91030     (     )
Epeak [keV] : 22.7877      ( -3.59239 4.13489 )
Norm@50keV  : 133.814    ( -133.814   39.3767 )
------------------------------------------------------------
# Chi-Squared =          44.98 using 59 PHA bins.
# Reduced chi-squared =         0.8033 for     56 degrees of freedom 
# Null hypothesis probability =   8.540754e-01
 
Photon flux (15-150 keV)    in 64 sec: 4.98444E-02 ( -0.0129426  0.0130298 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22034e-07 ( -3.50157e-08  3.72198e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.38542   ( 1.31834   1.31834 )
beta        : -9.37167    ( 4.59225   14.1326 )
Epeak [keV] : 22.8144      ( -12.0863 96.9146 )
Norm@50keV   : 51.1677    ( -51.1778   18.6924 )
------------------------------------------------------------
# Chi-Squared =          45.07 using 59 PHA bins.
# Reduced chi-squared =         0.8195 for     55 degrees of freedom 
# Null hypothesis probability =   8.278900e-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)  = 5.19849e-08
S(50-100 keV) = 3.22074e-08

T90 vs. Hardness ratio plot

T90                                   = 64 sec.
Hardness ratio (energy fluence ratio) = 0.619553

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.571578
Count Ratio (50-100 keV) / (15-25 keV) = -0.0635959

Mask shadow pattern

IMX = -3.364079326421376E-02, IMY = -2.267032450984514E-02

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]                   [']
 83.6180  22.0146    0.4  17.1  -71.3   2.6580  27.7    0.8	Crab                          
114.3509 -31.7632    2.3  46.1  139.1   1.6916   5.1 ------	UNKNOWN                       
 88.1019 -35.0556    2.7  47.4  169.5   0.8878   4.2 ------	UNKNOWN                       
 98.2337   9.2106    2.6   2.3  146.0   0.3549   4.5 ------	UNKNOWN                       
 73.4697 -25.9917    2.3  44.3 -169.2   0.7523   5.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
98.600610 963.088100
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6339  22.0183    0.2  19.0  -58.8  35.0295  62.5    0.2	Crab                          
139.4520  14.1354    2.8  40.6   66.0   9.9024   4.2 ------	UNKNOWN                       
 58.5280  32.7771    3.4  43.5  -64.2   9.4837   3.4 ------	UNKNOWN                       
 60.3522  48.8486    2.7  50.7  -44.4  13.4680   4.3 ------	UNKNOWN                       
 56.1797   3.9422    2.7  42.1 -107.2  10.6501   4.3 ------	UNKNOWN

Plot creation:
Wed May  5 02:17:31 EDT 2010