batgrbproduct analysis for trigger=422437

batgrbproduct Analysis for Trigger=422437

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): Tue May 18 21:52:04 EDT 2010
             Host Name: gcn5
   Current Working Dir: /local/data/raid16/prebascript_archive/trigger422437/GCN5_download_cron
======================================================================

  Trigger: 00422437      Segment: 000

  BAT Trigger Time: 295856306.56   [s; MET]
      Trigger Stop: 295856307.584   [s; MET]
               UTC: 2010-05-18T06:18:20.751780    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 311.161938515683   Dec: 40.1699494620105  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.6
     Image Trigger?:     NO
     Rate S/N Ratio:     28.7228132326901  [ if not an image trigger ]
     Image S/N Ratio:    6.6

  Flight Position:   [ source = BAT ]
    RA: 311.161938515683   Dec: 40.1699494620105  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 311.138270564354   Dec: 40.2016949128708  [deg; J2000]  
        { 20h 44m 33.2s , +40d 12' 06.1" }
         +/- 4.70139092988125 [arcmin] (estimated 90% radius based on SNR)
         +/- 3.33517452910639 [arcmin] (formal 1-sigma fit error)
    SNR: 3.33269063597737
 
  Angular difference between Flight and Ground position is 2.192018 arcmin
 
  Partial Coding Fraction: 1.015625    [ 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     0.000223   0.000491   0.021625   0.037780
           0.008019   0.009308   0.008173   0.010206 [error]
 Peak      0.000223   0.000491   0.021625   0.037780
           0.008019   0.009308   0.008173   0.010206 [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 4.27e-10 2.52e-09 1.30e-08 2.95e-07 4.18e-08 3.10e-07   erg/cm2
              Error 1.10e-09 3.30e-09 1.03e-08 5.22e-07 2.24e-08 5.27e-07   erg/cm2
Peak flux Power-law 1.33e-02 4.12e-02 1.05e-01 7.61e-01 2.85e-01 9.20e-01   ph/cm2/s
              Error 3.48e-02 5.55e-02 8.45e-02 1.13e+00 2.29e-01 1.10e+00   ph/cm2/s
 
Fluence   Cutoff-PL 1.36e-10 1.30e-10 1.86e-09 1.51e-08 7.83e-08 4.22e-08   erg/cm2
              Error 3.16e-09 9.69e-09 3.11e-07 2.32e-08 2.10e-07 0.00e+00   erg/cm2
Peak flux Cutoff-PL 4.10e-03 2.86e-02 1.19e-01 2.86e-01 2.76e-01 5.08e-01   ph/cm2/s
              Error 3.22e-02 5.32e-02 8.05e-02 1.42e+00 1.57e-01 0.00e+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   -0.363    0.448    -      -           1.80e-03 1.85e-03   42.630 57
CPL  -3.376    0.000     155.0    0.0      8.75e-03 0.00e+00   42.260 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL   -0.347    0.454    -      -           1.83e-03 1.87e-03   43.000 57
CPL  -3.310    0.000     155.8    0.0      8.62e-03 0.00e+00   42.650 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
  311.1383 +40.2017 0.0576    7.2  158.7       0.0599     3.3  TRIG_00422437       
------------------------------------------
 
Foreground time interval of the image:
  0.000   1.024 (delta_t =   1.024 [sec])
Background time interval of the image:
-60.560 -10.560 (delta_t =  50.000 [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

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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 1.024000

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 1.024000

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    0.000 sec. to    1.024 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.362515     ( 0.362515   1.25757 )
Norm@50keV  : 1.80403E-03    ( -0.00180403   0.00190423 )
------------------------------------------------------------
# Chi-Squared =          42.63 using 59 PHA bins.
# Reduced chi-squared =         0.7478 for     57 degrees of freedom 
# Null hypothesis probability =   9.215889e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.282938 ( -0.282938  0.173602 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.17916e-08 ( -2.23579e-08  2.23755e-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: -3.37596     (     )
Epeak [keV] : 154.972      ( -134.728 -134.728 )
Norm@50keV  : 8.74885E-03    (     )
------------------------------------------------------------
# Chi-Squared =          42.26 using 59 PHA bins.
# Reduced chi-squared =         0.7546 for     56 degrees of freedom 
# Null hypothesis probability =   9.129003e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.274956 ( -0.144787  0.169039 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.22089e-08 ( -2.30923e-08  2.33413e-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       : -0.332684   ( 0.332706   0.332706 )
beta        : 0.362548    ( -1.25886   -0.362513 )
Epeak [keV] : 11.9972      ( -11.9972 -11.9972 )
Norm@50keV   : 3.57035E-03    ( 3368.94   -0.00357032 )
------------------------------------------------------------
# Chi-Squared =          42.63 using 59 PHA bins.
# Reduced chi-squared =         0.7750 for     55 degrees of freedom 
# Null hypothesis probability =   8.882506e-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]    : 65.3507  (  )
R^2/D10^2   : 9.05012E-04  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          42.47 using 59 PHA bins.
# Reduced chi-squared =         0.7450 for     57 degrees of freedom 
# Null hypothesis probability =   9.242011e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.600e-09   9.313e-10
25- 50  1.172e-10   8.397e-11
50-150  3.673e-14   1.614e-14
15-150  1.717e-09   9.667e-10

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 0.952718       (-0.915465     0.783036)
------------------------------------------------------------
# Chi-Squared =          48.43 using 59 PHA bins.
# Reduced chi-squared =         0.8497 for     57 degrees of freedom 
# Null hypothesis probability =   7.832220e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.481e-09   5.975e-10
25- 50  1.341e-10   5.806e-11
50-150  3.274e-13   1.992e-13
15-150  1.615e-09   7.286e-10

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.71937        (-1.63204      -1.63204)
R1^2/D10^2  : 408.695        (      )
kT2 [keV]   : 66.9219        (-61.1028      -68.1887)
R2^2/D10^2  : 7.97721E-04    (-0.00057254   0.00687694)
------------------------------------------------------------
# Chi-Squared =          41.92 using 59 PHA bins.
# Chi-Squared =          41.84 using 59 PHA bins.
# Reduced chi-squared =         0.7621 for     55 degrees of freedom 
# Reduced chi-squared =         0.7607 for     55 degrees of freedom 
# Null hypothesis probability =   9.028400e-01
# Null hypothesis probability =   9.043161e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.210e-09   3.870e-10
25- 50  2.717e-09   2.037e-09
50-150  3.791e-08   2.688e-08
15-150  4.184e-08   2.751e-08

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: -0.347003     ( 0.347003   1.25597 )
Norm@50keV  : 1.82989E-03    ( -0.00182989   0.00190713 )
------------------------------------------------------------
# Chi-Squared =          43.00 using 59 PHA bins.
# Reduced chi-squared =         0.7545 for     57 degrees of freedom 
# Null hypothesis probability =   9.151028e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.284922 ( -0.284922  0.173944 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.19431e-08 ( -2.23407e-08  2.23597e-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: -3.30978     (     )
Epeak [keV] : 155.753      ( -134.351 -134.351 )
Norm@50keV  : 8.61866E-03    (     )
------------------------------------------------------------
# Chi-Squared =          42.65 using 59 PHA bins.
# Reduced chi-squared =         0.7616 for     56 degrees of freedom 
# Null hypothesis probability =   9.056031e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.275988 ( -0.144573  0.169595 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.24186e-08 ( -2.31776e-08  2.32497e-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       : 0.161874   ( -0.163449   -0.163449 )
beta        : 0.346653    ( -1.25556   -0.346986 )
Epeak [keV] : 25.1850      ( -25.1861 -25.1861 )
Norm@50keV   : 2.79067E-03    ( -0.00279031   78056.7 )
------------------------------------------------------------
# Chi-Squared =          43.00 using 59 PHA bins.
# Reduced chi-squared =         0.7819 for     55 degrees of freedom 
# Null hypothesis probability =   8.799187e-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]    : 71.5948  (  )
R^2/D10^2   : 7.34143E-04  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
# Chi-Squared =          42.82 using 59 PHA bins.
# Reduced chi-squared =         0.7513 for     57 degrees of freedom 
# Null hypothesis probability =   9.182460e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.691e-09   8.991e-10
25- 50  1.231e-10   3.532e-11
50-150  3.798e-14   9.339e-15
15-150  1.814e-09   8.397e-10

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 0.950630       (-0.930619     0.779736)
------------------------------------------------------------
# Chi-Squared =          48.75 using 59 PHA bins.
# Reduced chi-squared =         0.8553 for     57 degrees of freedom 
# Null hypothesis probability =   7.733058e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.566e-09   4.354e-10
25- 50  1.419e-10   7.885e-11
50-150  3.465e-13   4.439e-13
15-150  1.708e-09   8.540e-10

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 1.74802        (-1.71314      -1.71314)
R1^2/D10^2  : 375.075        (      )
kT2 [keV]   : 67.1579        (-61.3271      -68.359)
R2^2/D10^2  : 7.95408E-04    (-0.000572813   0.00687867)
------------------------------------------------------------
# Chi-Squared =          42.17 using 59 PHA bins.
# Chi-Squared =          42.13 using 59 PHA bins.
# Reduced chi-squared =         0.7667 for     55 degrees of freedom 
# Reduced chi-squared =         0.7660 for     55 degrees of freedom 
# Null hypothesis probability =   8.978132e-01
# Null hypothesis probability =   8.985542e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.263e-09   3.474e-10
25- 50  2.467e-09   1.850e-09
50-150  3.714e-08   2.418e-08
15-150  4.087e-08   2.514e-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: -0.362515     ( 0.362515   1.25757 )
Norm@50keV  : 1.80403E-03    ( -0.00180403   0.00190423 )
------------------------------------------------------------
# Chi-Squared =          42.63 using 59 PHA bins.
# Reduced chi-squared =         0.7478 for     57 degrees of freedom 
# Null hypothesis probability =   9.215889e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.282938 ( -0.282938  0.173602 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.17916e-08 ( -2.23579e-08  2.23755e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -3.37596     (     )
Epeak [keV] : 154.972      ( -134.728 -134.728 )
Norm@50keV  : 8.74885E-03    (     )
------------------------------------------------------------
# Chi-Squared =          42.26 using 59 PHA bins.
# Reduced chi-squared =         0.7546 for     56 degrees of freedom 
# Null hypothesis probability =   9.129003e-01
 
Photon flux (15-150 keV)    in 1.024 sec: 0.274956 ( -0.144787  0.169039 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.22089e-08 ( -2.30923e-08  2.33413e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.332684   ( 0.332706   0.332706 )
beta        : 0.362548    ( -1.25886   -0.362513 )
Epeak [keV] : 11.9972      ( -11.9972 -11.9972 )
Norm@50keV   : 3.57035E-03    ( 3368.94   -0.00357032 )
------------------------------------------------------------
# Chi-Squared =          42.63 using 59 PHA bins.
# Reduced chi-squared =         0.7750 for     55 degrees of freedom 
# Null hypothesis probability =   8.882506e-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)  = 2.52262e-09
S(50-100 keV) = 1.29733e-08

T90 vs. Hardness ratio plot

T90                                   = 1.02399998903275 sec.
Hardness ratio (energy fluence ratio) = 5.14279

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 2.20179
Count Ratio (50-100 keV) / (15-25 keV) = 96.9731

Mask shadow pattern

IMX = -1.176206406431809E-01, IMY = -4.577623060555249E-02

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 1.024000

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:
-60.560000 -10.560000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
288.8881  10.8521    5.6  35.4   74.5   1.2760   2.1    7.7	GRS 1915+105                  
299.5577  35.2340    2.0  14.6  116.6   1.7831   5.8    2.5	Cyg X-1                       
307.9257  40.9001    5.7   9.5  151.6   0.5713   2.0    8.9	Cyg X-3                       
325.9369  38.4257    0.0   7.7  -98.7   0.3415   1.4   12.7	Cyg X-2                       
237.6588  71.0896    3.8  53.9  177.2   3.8521   3.1 ------	UNKNOWN                       
236.9172  71.1103    4.6  54.1  177.2   3.3533   2.6 ------	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]                   [']
288.7380  10.7712    0.0  35.6   74.6   0.0326   0.7   11.0	GRS 1915+105                  
299.4207  35.2356    5.0  14.7  116.6   0.0475   2.3    8.6	Cyg X-1                       
307.9023  41.0413    7.6   9.6  152.3   0.0282   1.5   10.8	Cyg X-3                       
326.0622  38.4305   30.4   7.7  -98.5   0.0070   0.4    8.3	Cyg X-2                       
311.3602  29.8170    2.3   7.3   66.7   0.0935   5.0 ------	UNKNOWN                       
320.4138  10.4890    2.8  24.7   13.3   0.0846   4.2 ------	UNKNOWN                       
 55.8473  81.4082    2.6  56.7 -149.4   0.5206   4.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:

Plot creation:
Tue May 18 22:02:57 EDT 2010