batgrbproduct analysis for trigger=412220

batgrbproduct Analysis for Trigger=412220

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time (local time): Fri Jan 17 19:47:58 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger412220
======================================================================

  Trigger: 00412220      Segment: 000

  BAT Trigger Time: 287794719.744   [s; MET]
      Trigger Stop: 287794723.84   [s; MET]
               UTC: 2010-02-13T22:58:34.216240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 124.337626580859   Dec: 43.4552068987612  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.85
     Image Trigger?:     NO
     Rate S/N Ratio:     11.1803398874989  [ if not an image trigger ]
     Image S/N Ratio:    10.85

  Flight Position:   [ source = BAT ]
    RA: 124.337626580859   Dec: 43.4552068987612  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 124.309721978964   Dec: 43.4602614977526  [deg; J2000]  
        { 08h 17m 14.3s , +43d 27' 36.9" }
         +/- 1.15305250953836 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.514827216667112 [arcmin] (formal 1-sigma fit error)
    SNR: 24.8177579076713
 
  Angular difference between Flight and Ground position is 1.252596 arcmin
 
  Partial Coding Fraction: 0.5625    [ including projection effects ]

  Duration
     T90: 91.8560000061989 +/- 20.3447612447196
        Measured from: -1.85600000619888
                   to: 90     [s; relative to TRIGTIME]
     T50: 24.9760000109673 +/- 5.74319770554251
        Measured from: 5.08799999952316
                   to: 30.0640000104904     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.99599999189377     
                   to: 3.99599999189377     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.08000004291534     
                   to: 111.087999999523     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.020942   0.940349   0.364125   0.094816
           0.062490   0.064305   0.056479   0.049208 [error]
 Peak      0.031356   0.038190   0.021217  -0.002535
           0.006770   0.007155   0.006269   0.005055 [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 3.46e-07 3.94e-07 3.22e-07 4.40e-07 1.22e-06 1.50e-06   erg/cm2
              Error 3.67e-08 3.25e-08 5.08e-08 1.33e-07 1.16e-07 1.97e-07   erg/cm2
Peak flux Power-law 3.43e-01 2.70e-01 1.42e-01 1.09e-01 8.05e-01 8.64e-01   ph/cm2/s
              Error 1.00e-01 5.84e-02 4.80e-02 6.84e-02 1.74e-01 1.90e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.35e-07 4.25e-07 2.87e-07 1.15e-07 1.13e-06 1.16e-06   erg/cm2
              Error 3.93e-08 4.51e-08 7.19e-08 2.18e-07 1.45e-07 2.26e-07   erg/cm2
Peak flux Cutoff-PL 2.88e-01 3.39e-01 1.34e-01 1.27e-02 7.73e-01 7.74e-01   ph/cm2/s
              Error 1.16e-01 8.57e-02 6.36e-02 4.02e-02 1.73e-01 1.75e-01   ph/cm2/s
 
Fluence        Band 3.32e-07 4.24e-07 2.76e-07 2.78e-07 1.15e-06 1.32e-06   erg/cm2
              Error 4.11e-08 3.99e-08 -------- -------- -------- --------   erg/cm2
Peak flux      Band -------- -------- -------- -------- -------- --------   ph/cm2/s
              Error -------- -------- -------- -------- -------- --------   ph/cm2/s

 
=== Time-averaged spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    2.292    0.162    -      -           1.09e-03 1.25e-04   53.810 57
CPL   1.591    0.668      21.4   15.4      2.99e-03 4.85e-03   51.030 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.921    0.367    -      -           5.56e-03 1.47e-03   66.550 57
CPL  -0.126    2.211      42.2   18.8      8.79e-02 1.65e+00   62.590 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: 22.272000 sec.
T50 in the 50-300 keV band: 10.752000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  117.168   -6.080  111.088
T90    91.856   -1.856   90.000
T50    24.976    5.088   30.064
Peak    1.000    2.996    3.996

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  124.3097    43.4603   0.0078    35.0530    15.7677         2.1686615     24.818 TRIG_00412220                 
 
Foreground time interval of the image:
 -6.080  34.957 (delta_t =  41.037 [sec])
Background time interval of the image:
-239.744  -6.080 (delta_t = 233.664 [sec])

Lightcurves

Notes:

1) The mask-weighted light curves are using the flight position.
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)

Quad-rate summed light curves (from T0-300s to T0+1000s)

Spectral Evolution

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using 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.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from   -6.080 sec. to  111.088 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.29200     ( -0.157774   0.166059 )
Norm@50keV  : 1.09388E-03    ( -0.000125789   0.000124143 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.81 using 59 PHA bins.
# Reduced chi-squared =         0.9441 for     57 degrees of freedom 
# Null hypothesis probability =   5.953886e-01
 
Photon flux (15-150 keV)    in 117.2 sec: 0.190318 ( -0.0149825  0.0149856 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.22333e-06 ( -1.15244e-07  1.17594e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -6.080 sec. to  111.088 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.59072     ( -0.925261   0.411155 )
Epeak [keV] : 21.3746      ( -20.298 10.5932 )
Norm@50keV  : 2.99426E-03    ( -0.000965382   0.00874256 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.03 using 59 PHA bins.
# Reduced chi-squared =         0.9113 for     56 degrees of freedom 
# Null hypothesis probability =   6.629817e-01
 
Photon flux (15-150 keV)    in 117.2 sec: 0.185289 ( -0.015746  0.015783 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12541e-06 ( -1.38955e-07  1.51344e-07 ) ergs/cm2

Band function

Time interval is from   -6.080 sec. to  111.088 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.59466   ( 1.91625   1.91625 )
beta        : -10.00000    ( 10   20 )
Epeak [keV] : 21.3248      ( -4.98936 8.76164 )
Norm@50keV   : 2.97354E-03    ( -0.000232618   0.000232618 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.03 using 59 PHA bins.
# Reduced chi-squared =         0.9278 for     55 degrees of freedom 
# Null hypothesis probability =   6.269901e-01
 
Photon flux (15-150 keV)    in 117.2 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.1508e-06 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 7.70560  (-0.683495  0.759481)
R^2/D10^2   : 0.238576  (-0.0765658   0.112325)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.45 using 59 PHA bins.
# Reduced chi-squared =          1.254 for     57 degrees of freedom 
# Null hypothesis probability =   9.425982e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.915e-07   3.592e-08
25- 50  4.776e-07   4.846e-08
50-150  1.107e-07   3.245e-08
15-150  8.798e-07   8.731e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 39.9617       (-7.60799      10.2594)
Norm        : 1.22536       (-0.187984     0.229791)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.18 using 59 PHA bins.
# Reduced chi-squared =         0.8978 for     57 degrees of freedom 
# Null hypothesis probability =   6.921996e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.297e-07   3.475e-08
25- 50  4.335e-07   3.832e-08
50-150  3.351e-07   8.433e-08
15-150  1.098e-06   1.202e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.77555        (-1.01254      1.02387)
R1^2/D10^2  : 0.635321        (-0.283766      0.634285)
kT2 [keV]   : 19.9725        (-6.52107      16.7927)
R2^2/D10^2  : 2.91607E-03    (-0.00255336   0.00923382)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.32 using 59 PHA bins.
# Reduced chi-squared =         0.8422 for     55 degrees of freedom 
# Null hypothesis probability =   7.912867e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.381e-07   8.315e-08
25- 50  4.167e-07   9.980e-08
50-150  4.092e-07   2.231e-07
15-150  1.164e-06   3.200e-07

Peak spectrum fit

Power-law model

Time interval is from    2.996 sec. to    3.996 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.92100     ( -0.348038   0.385722 )
Norm@50keV  : 5.55685E-03    ( -0.00148764   0.0014447 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.55 using 59 PHA bins.
# Reduced chi-squared =          1.168 for     57 degrees of freedom 
# Null hypothesis probability =   1.811924e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.804672 ( -0.174031  0.174039 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.10997e-08 ( -1.2966e-08  1.35078e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    2.996 sec. to    3.996 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.126007     ( -2.63377   1.78761 )
Epeak [keV] : 42.2461      ( -12.0958 25.5282 )
Norm@50keV  : 8.78873E-02    ( -0.0883438   3.20999 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.59 using 59 PHA bins.
# Reduced chi-squared =          1.118 for     56 degrees of freedom 
# Null hypothesis probability =   2.540304e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.772519 ( -0.172505  0.17417 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.4405e-08 ( -1.15331e-08  1.36829e-08 ) ergs/cm2

Band function

Time interval is from    2.996 sec. to    3.996 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.194994   ( -2.57717   -0.808328 )
beta        : -9.99869    ( 9.99066   19.9906 )
Epeak [keV] : 41.9209      ( -10.3954 25.7766 )
Norm@50keV   : 9.69124E-02    ( -0.0962031   3.20621 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.59 using 59 PHA bins.
# Reduced chi-squared =          1.138 for     55 degrees of freedom 
# Null hypothesis probability =   2.248876e-01
 
Photon flux (15-150 keV)    in 1 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]    : 10.5430  (-2.12869  2.59211)
R^2/D10^2   : 0.334731  (-0.190254   0.44265)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.59 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     57 degrees of freedom 
# Null hypothesis probability =   2.555888e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.699e-09   3.040e-09
25- 50  2.059e-08   6.820e-09
50-150  1.250e-08   6.518e-09
15-150  4.079e-08   1.550e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 68.8128       (-30.003      81.8549)
Norm        : 4.08741       (-1.1361     1.55053)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.23 using 59 PHA bins.
# Reduced chi-squared =          1.127 for     57 degrees of freedom 
# Null hypothesis probability =   2.382303e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.047e-08   3.490e-09
25- 50  1.658e-08   6.041e-09
50-150  2.102e-08   1.542e-08
15-150  4.806e-08   2.176e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.44305        (-5.40478      -5.40478)
R1^2/D10^2  : 1.52925        (-1.52941      -1.52941)
kT2 [keV]   : 13.1910        (-13.152      -13.152)
R2^2/D10^2  : 0.112674    (-0.113215   0.506914)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.36 using 59 PHA bins.
# Reduced chi-squared =          1.134 for     55 degrees of freedom 
# Null hypothesis probability =   2.310353e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.319e-09   5.420e-09
25- 50  1.868e-08   1.052e-08
50-150  1.638e-08   9.760e-09
15-150  4.438e-08   2.440e-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: 2.03827     ( -0.120578   0.124307 )
Norm@50keV  : 2.91790E-03    ( -0.000236385   0.00023348 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.56 using 59 PHA bins.
# Reduced chi-squared =          1.133 for     57 degrees of freedom 
# Null hypothesis probability =   2.293669e-01
 
Photon flux (15-150 keV)    in 41.04 sec: 0.445568 ( -0.0295467  0.0295659 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.10689e-06 ( -8.34602e-08  8.44427e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.18045     ( -0.636019   0.54387 )
Epeak [keV] : 39.3073      ( -9.11129 8.54395 )
Norm@50keV  : 9.16057E-03    ( -0.00466948   0.0123831 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.71 using 59 PHA bins.
# Reduced chi-squared =          1.013 for     56 degrees of freedom 
# Null hypothesis probability =   4.484646e-01
 
Photon flux (15-150 keV)    in 41.04 sec: 0.429943 ( -0.030971  0.030999 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.01644e-06 ( -9.52949e-08  9.905e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.77793   ( -5.45016   -4.77793 )
beta        : -2.28272    ( -0.183468   0.166379 )
Epeak [keV] : 24.9545      ( -2.35443 2.26731 )
Norm@50keV   : 345.285    ( -22.3762   787.893 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.24 using 59 PHA bins.
# Reduced chi-squared =         0.9498 for     55 degrees of freedom 
# Null hypothesis probability =   5.808668e-01
 
Photon flux (15-150 keV)    in 41.04 sec: 0.431093 ( 6.56891  -0.030746 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05708e-06 ( -1.0568e-06  -8.68571e-08 ) ergs/cm2

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

S(25-50 keV)  = 3.94e-07
S(50-100 keV) = 3.22e-07

T90 vs. Hardness ratio plot

T90                                   = 91.8560000061989 sec.
Hardness ratio (energy fluence ratio) = 0.817259

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 0.92106
Count Ratio (50-100 keV) / (15-25 keV) = 0.356656

Mask shadow pattern

IMX = 6.751868112415501E-01, IMY = -1.906477255123337E-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:
-239.744000 -6.080000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 96.8805  46.6460    2.3  51.8    0.8   2.1528   5.1 ------	UNKNOWN                       
115.0850  20.6240    2.8  28.3  -29.4   0.6575   4.1 ------	UNKNOWN                       
167.5869 -36.4271    2.5  54.0 -163.8   2.2161   4.6 ------	UNKNOWN                       
146.7529 -41.4824    4.2  54.1 -142.9   2.7792   2.8 ------	UNKNOWN                       
 94.3353   8.0823    2.5  48.4  -50.1   3.4364   4.7 ------	UNKNOWN                       
111.0388 -12.8386    2.3  40.9  -86.9   3.7537   5.2 ------	UNKNOWN

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

Time interval of the image:
-6.080000 34.956600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
124.3097  43.4603    0.5  35.1   15.8   2.1682  24.8 ------	UNKNOWN                       
116.1941 -18.3066    3.0  40.9  -98.2   1.0041   3.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
136.356600 202.156900
203.256000 235.956600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6210  22.0157    0.7  39.9 -158.8   2.2726  16.2    0.7	Crab                          
224.6682  71.4540    2.6  52.3  -26.3   1.3391   4.5 ------	UNKNOWN                       
237.8988  66.5985    2.5  58.9  -24.4   3.2387   4.6 ------	UNKNOWN                       
 62.9431  28.3339    2.8  50.8 -135.5   2.0676   4.2 ------	UNKNOWN

Plot creation:
Sun May 31 02:10:01 EDT 2015