batgrbproduct analysis for trigger=424161

batgrbproduct Analysis for Trigger=424161

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): Wed Jun  9 08:40:07 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger424161/GCN5_download_cron
======================================================================

  Trigger: 00424161      Segment: 000

  BAT Trigger Time: 297688848   [s; MET]
      Trigger Stop: 297690536   [s; MET]
               UTC: 2010-06-08T11:20:42.126860    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 296.429520249823   Dec: 27.3659120736822  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    8.03
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.03

  Flight Position:   [ source = BAT ]
    RA: 296.429520249823   Dec: 27.3659120736822  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 296.458007686608   Dec: 27.4832754225102  [deg; J2000]  
        { 19h 45m 49.9s , +27d 28' 59.8" }
         +/- 7.3551308344038 [arcmin] (estimated 90% radius based on SNR)
         +/- 4.53179570400232 [arcmin] (formal 1-sigma fit error)
    SNR: 1.75845836822205
 
  Angular difference between Flight and Ground position is 7.203383 arcmin
 
  Partial Coding Fraction: 0.96875    [ including projection effects ]

  Duration
     T90: 1688 +/- 
        Measured from: 0
                   to: 1688     [s; relative to TRIGTIME]
     T50: 1688 +/- 
        Measured from: 0
                   to: 1688     [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

  Fluence
     Peak Flux  (peak 1688 second)
        Measured from: 0     
                   to: 1688     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 0     
                   to: 1688     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.156929   0.136538   0.036649   0.032754
           0.090442   0.091960   0.079873   0.067380 [error]
 Peak      0.156929   0.136538   0.036649   0.032754
           0.090442   0.091960   0.079873   0.067380 [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 5.51e-08 4.89e-08 2.99e-08 2.76e-08 1.46e-07 1.61e-07   erg/cm2
              Error 4.58e-08 4.56e-08 5.12e-08 1.55e-07 1.38e-07 2.54e-07   erg/cm2
Peak flux Power-law 6.86e-03 3.35e-03 1.00e-03 3.81e-04 1.14e-02 1.16e-02   ph/cm2/s
              Error 4.48e-03 3.06e-03 1.67e-03 1.81e-03 9.42e-03 9.76e-03   ph/cm2/s
 
Fluence   Cutoff-PL 5.52e-08 4.96e-08 2.84e-08 1.78e-08 1.42e-07 1.53e-07   erg/cm2
              Error 4.61e-08 5.83e-08 5.12e-08 1.54e-07 1.53e-07 2.53e-07   erg/cm2
Peak flux Cutoff-PL 6.85e-03 3.35e-03 1.00e-03 3.78e-04 1.14e-02 1.16e-02   ph/cm2/s
              Error 4.48e-03 3.06e-03 1.67e-03 1.80e-03 9.41e-03 9.75e-03   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    2.715    3.056    -      -           5.03e-05 6.18e-05   63.610 57
CPL   1.975    0.000       1.1    0.0      1.56e-04 0.00e+00   63.610 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.744    3.050    -      -           4.97e-05 6.16e-05   63.910 57
CPL   1.921    0.000       3.0    0.0      1.82e-04 0.00e+00   63.930 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 1688.000    0.000 1688.000
T90  1688.000    0.000 1688.000
T50  1688.000    0.000 1688.000
Peak 1688.000    0.000 1688.000

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
  296.4580 +27.4833 0.1091    8.3   65.5       0.3977     1.8  TRIG_00424161       
------------------------------------------
 
Foreground time interval of the image:
285.000 303.136 (delta_t =  18.136 [sec])
706.000 723.025 (delta_t =  17.025 [sec])
728.000 963.063 (delta_t = 235.063 [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

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

Multiple GTIs in the spectrum
tstart tstop
285.000000 303.136300
706.000000 723.025200
728.000000 963.063200
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.71543     ( -1.39856   4.71365 )
Norm@50keV  : 5.02808E-05    ( -5.03109e-05   7.32033e-05 )
------------------------------------------------------------
# Chi-Squared =          63.61 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     57 degrees of freedom 
# Null hypothesis probability =   2.550843e-01
 
Photon flux (15-150 keV)    in 270.2 sec: 1.13432E-02 ( -0.0113432  0.00744274 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45556e-07 ( -1.15381e-07  1.61577e-07 ) ergs/cm2

Cutoff power-law model

Multiple GTIs in the spectrum
tstart tstop
285.000000 303.136300
706.000000 723.025200
728.000000 963.063200
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97516     (     )
Epeak [keV] : 1.12375      (   )
Norm@50keV  : 1.55947E-04    (     )
------------------------------------------------------------
# Chi-Squared =          63.61 using 59 PHA bins.
# Reduced chi-squared =          1.136 for     56 degrees of freedom 
# Null hypothesis probability =   2.261579e-01
 
Photon flux (15-150 keV)    in 270.2 sec: 1.13389E-02 ( -0.0113389  0.0074405 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.42412e-07 ( -1.42412e-07  1.64313e-07 ) ergs/cm2

Band function

Multiple GTIs in the spectrum
tstart tstop
285.000000 303.136300
706.000000 723.025200
728.000000 963.063200
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -10.00000   ( 2.09434e+06   2.09434e+06 )
beta        : -2.71177    ( -4.71106   1.39447 )
Epeak [keV] : 1.91962      ( -1.91962 -1.91962 )
Norm@50keV   : 6.85400E-03    ( -0.00685412   0.00993198 )
------------------------------------------------------------
# Chi-Squared =          63.61 using 59 PHA bins.
# Reduced chi-squared =          1.157 for     55 degrees of freedom 
# Null hypothesis probability =   1.992041e-01
 
Photon flux (15-150 keV)    in 270.2 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]    : 6.61308  (-6.61389  6.66557)
R^2/D10^2   : 2.84291E-02  (-0.0284152   52.8381)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          63.93 using 59 PHA bins.
# Reduced chi-squared =          1.122 for     57 degrees of freedom 
# Null hypothesis probability =   2.462100e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.068e-08   3.345e-08
25- 50  6.200e-08   4.850e-08
50-150  8.327e-09   8.890e-09
15-150  1.210e-07   8.648e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 23.8056       (-23.8056      -23.8056)
Norm        : 0.114513       (-0.114513     8.40637)
------------------------------------------------------------
# Chi-Squared =          63.63 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     57 degrees of freedom 
# Null hypothesis probability =   2.544567e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.484e-08   3.911e-08
25- 50  5.444e-08   4.027e-08
50-150  2.152e-08   2.655e-08
15-150  1.308e-07   9.914e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.30560        (-1.77122      9.76238)
R1^2/D10^2  : 436.220        (      )
kT2 [keV]   : 7.94262        (-5.08581      -7.95559)
R2^2/D10^2  : 1.15064E-02    (-0.0112585   1.3593)
------------------------------------------------------------
# Chi-Squared =          63.11 using 59 PHA bins.
# Chi-Squared =          62.95 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     55 degrees of freedom 
# Reduced chi-squared =          1.145 for     55 degrees of freedom 
# Null hypothesis probability =   2.114507e-01
# Null hypothesis probability =   2.156112e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.008e-08   2.435e-08
25- 50  5.964e-08   4.745e-08
50-150  1.719e-08   1.428e-08
15-150  1.269e-07   8.365e-08

Peak spectrum fit

Power-law model

Time interval is from  728.000 sec. to  963.063 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.74382     ( -1.37318   4.72773 )
Norm@50keV  : 4.97092E-05    ( -4.9742e-05   7.3533e-05 )
------------------------------------------------------------
# Chi-Squared =          63.91 using 59 PHA bins.
# Reduced chi-squared =          1.121 for     57 degrees of freedom 
# Null hypothesis probability =   2.467517e-01
 
Photon flux (15-150 keV)    in 270.2 sec: 1.14310E-02 ( -0.011431  0.00740278 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45427e-07 ( -1.15278e-07  1.60959e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  728.000 sec. to  963.063 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.92060     (     )
Epeak [keV] : 3.03640      (   )
Norm@50keV  : 1.81726E-04    (     )
------------------------------------------------------------
# Chi-Squared =          63.93 using 59 PHA bins.
# Reduced chi-squared =          1.142 for     56 degrees of freedom 
# Null hypothesis probability =   2.180888e-01
 
Photon flux (15-150 keV)    in 270.2 sec: 1.14266E-02 ( -0.0114266  0.0074006 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45403e-07 ( -1.15288e-07  1.60917e-07 ) ergs/cm2

Band function

Time interval is from  728.000 sec. to  963.063 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.50570   ( 11.9784   11.9784 )
beta        : -2.73957    ( -4.72914   1.36861 )
Epeak [keV] : 12.9480      ( -12.948 -12.948 )
Norm@50keV   : 6.77981E-03    ( -0.00677982   0.00997382 )
------------------------------------------------------------
# Chi-Squared =          63.91 using 59 PHA bins.
# Reduced chi-squared =          1.162 for     55 degrees of freedom 
# Null hypothesis probability =   1.920165e-01
 
Photon flux (15-150 keV)    in 270.2 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]    : 6.50133  (-6.50178  6.39442)
R^2/D10^2   : 3.08692E-02  (-0.0308607   87.3341)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          64.32 using 59 PHA bins.
# Reduced chi-squared =          1.128 for     57 degrees of freedom 
# Null hypothesis probability =   2.357530e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.211e-08   3.305e-08
25- 50  6.158e-08   4.556e-08
50-150  7.750e-09   8.457e-09
15-150  1.214e-07   8.749e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 23.1559       (-23.1559      -23.1559)
Norm        : 0.119007       (-0.119007     9.55532)
------------------------------------------------------------
# Chi-Squared =          63.96 using 59 PHA bins.
# Reduced chi-squared =          1.122 for     57 degrees of freedom 
# Null hypothesis probability =   2.455187e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.590e-08   3.730e-08
25- 50  5.446e-08   4.157e-08
50-150  2.064e-08   2.610e-08
15-150  1.310e-07   9.928e-08

Double BB

R1^2/D10^2  : 2.17398E+05        (      )
kT2 [keV]   : 7.75373        (-5.0693      -7.96341)
R2^2/D10^2  : 1.31721E-02    (   )
------------------------------------------------------------
# Chi-Squared =          63.39 using 59 PHA bins.
# Chi-Squared =          63.22 using 59 PHA bins.
# Chi-Squared =          63.06 using 59 PHA bins.
# Reduced chi-squared =          1.153 for     55 degrees of freedom 
# Reduced chi-squared =          1.149 for     55 degrees of freedom 
# Reduced chi-squared =          1.147 for     55 degrees of freedom 
# Null hypothesis probability =   2.045959e-01
# Null hypothesis probability =   2.088724e-01
# Null hypothesis probability =   2.127327e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.053e-08   2.544e-08
25- 50  5.963e-08   4.393e-08
50-150  1.734e-08   1.632e-08
15-150  1.275e-07   8.910e-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: 2.71543     ( -1.39856   4.71365 )
Norm@50keV  : 5.02808E-05    ( -5.03109e-05   7.32033e-05 )
------------------------------------------------------------
# Chi-Squared =          63.61 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     57 degrees of freedom 
# Null hypothesis probability =   2.550843e-01
 
Photon flux (15-150 keV)    in 270.2 sec: 1.13432E-02 ( -0.0113432  0.00744274 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.45556e-07 ( -1.15381e-07  1.61577e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.97516     (     )
Epeak [keV] : 1.12375      (   )
Norm@50keV  : 1.55947E-04    (     )
------------------------------------------------------------
# Chi-Squared =          63.61 using 59 PHA bins.
# Reduced chi-squared =          1.136 for     56 degrees of freedom 
# Null hypothesis probability =   2.261579e-01
 
Photon flux (15-150 keV)    in 270.2 sec: 1.13389E-02 ( -0.0113389  0.0074405 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.42412e-07 ( -1.42412e-07  1.64313e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -10.00000   ( 2.09434e+06   2.09434e+06 )
beta        : -2.71177    ( -4.71106   1.39447 )
Epeak [keV] : 1.91962      ( -1.91962 -1.91962 )
Norm@50keV   : 6.85400E-03    ( -0.00685412   0.00993198 )
------------------------------------------------------------
# Chi-Squared =          63.61 using 59 PHA bins.
# Reduced chi-squared =          1.157 for     55 degrees of freedom 
# Null hypothesis probability =   1.992041e-01
 
Photon flux (15-150 keV)    in 270.2 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)  = 4.89016e-08
S(50-100 keV) = 2.98585e-08

T90 vs. Hardness ratio plot

T90                                   = 1688 sec.
Hardness ratio (energy fluence ratio) = 0.610583

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.870062
Count Ratio (50-100 keV) / (15-25 keV) = 0.233539

Mask shadow pattern

IMX = 6.004290401108933E-02, IMY = -1.320042172539902E-01

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:

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

Time interval of the image:
285.000000 303.136300
706.000000 723.025200
728.000000 963.063200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5233  35.4616    8.6  34.8  161.0   0.4303   1.3    7.8	Her X-1                       
288.8473  10.9736    1.5  25.9   78.4   2.2609   7.7    3.3	GRS 1915+105                  
299.5975  35.1991    0.3   1.7  -15.7  10.1391  45.6    0.4	Cyg X-1                       
308.0710  40.9286    1.6   9.7  -67.3   1.5878   7.1    2.3	Cyg X-3                       
325.9344  38.3437    3.1  22.7  -46.8   0.7896   3.7   11.2	Cyg X-2                       
248.3596  46.8017    2.1  38.0 -179.0   1.6860   5.6 ------	UNKNOWN                       
215.8647  50.3945    2.3  58.4 -169.3   6.9765   5.0 ------	UNKNOWN                       
348.6026  44.4724    4.0  39.3  -60.5   1.4492   2.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
1758.300590 1770.300600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4408  35.4890   63.7  38.4  108.3   0.0230   0.2    8.8	Her X-1                       
299.5862  35.2553    1.8  38.8   48.1   0.6125   6.2    3.2	Cyg X-1                       
308.0761  41.0041    9.3  34.8   35.0   0.0765   1.2    3.5	Cyg X-3                       
326.1248  38.2034    6.1  41.9   15.1  -0.1293  -1.9    7.4	Cyg X-2                       
 11.7217  35.8805    2.3  57.6  -28.3   1.1007   5.0 ------	UNKNOWN

Plot creation:
Wed Jun  9 08:55:30 EDT 2010