batgrbproduct analysis for trigger=411248

batgrbproduct Analysis for Trigger=411248

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 20:08:35 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger411248
======================================================================

  Trigger: 00411248      Segment: 000

  BAT Trigger Time: 287036328.576   [s; MET]
      Trigger Stop: 287036340.736   [s; MET]
               UTC: 2010-02-05T04:18:43.074340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 141.405845835995   Dec: 31.7394932106859  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.08
     Image Trigger?:     NO
     Rate S/N Ratio:     13.3790881602597  [ if not an image trigger ]
     Image S/N Ratio:    8.08

  Flight Position:   [ source = BAT ]
    RA: 141.405845835995   Dec: 31.7394932106859  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 141.385012523357   Dec: 31.7434115266088  [deg; J2000]  
        { 09h 25m 32.4s , +31d 44' 36.3" }
         +/- 1.97617766191355 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.609011442474881 [arcmin] (formal 1-sigma fit error)
    SNR: 11.4950225814903
 
  Angular difference between Flight and Ground position is 1.088724 arcmin
 
  Partial Coding Fraction: 0.8046875    [ including projection effects ]

  Duration
     T90: 25.8439999222755 +/- 4.35770214017194
        Measured from: -4.38799995183945
                   to: 21.4559999704361     [s; relative to TRIGTIME]
     T50: 10.4919999837875 +/- 4.05919793977672
        Measured from: 3.15600001811981
                   to: 13.6480000019073     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 8.11599999666214     
                   to: 9.11599999666214     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.17999994754791     
                   to: 23.6840000152588     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.200030   0.227077   0.156249   0.074595
           0.027398   0.028735   0.026113   0.024068 [error]
 Peak      0.008527   0.021282   0.012337   0.015400
           0.005142   0.005379   0.004713   0.004392 [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 5.33e-08 9.34e-08 1.25e-07 3.44e-07 3.64e-07 6.16e-07   erg/cm2
              Error 1.13e-08 1.27e-08 2.55e-08 1.47e-07 6.02e-08 1.70e-07   erg/cm2
Peak flux Power-law 1.06e-01 1.19e-01 9.52e-02 1.27e-01 3.66e-01 4.47e-01   ph/cm2/s
              Error 6.22e-02 4.33e-02 3.88e-02 1.16e-01 1.21e-01 1.55e-01   ph/cm2/s
 
Fluence   Cutoff-PL 5.22e-08 9.58e-08 1.26e-07 2.40e-07 3.56e-07 5.13e-07   erg/cm2
              Error 9.54e-09 1.60e-08 2.64e-08 2.15e-07 6.87e-08 2.41e-07   erg/cm2
Peak flux Cutoff-PL 1.06e-01 1.19e-01 9.49e-02 1.25e-01 3.67e-01 4.45e-01   ph/cm2/s
              Error 6.35e-02 4.69e-02 3.99e-02 9.64e-02 1.21e-01 1.66e-01   ph/cm2/s
 
Fluence        Band 5.15e-08 9.65e-08 1.24e-07 2.84e-07 3.56e-07 5.59e-07   erg/cm2
              Error -------- -------- -------- -------- -------- --------   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    1.578    0.247    -      -           1.30e-03 1.95e-04   50.650 57
CPL   1.379    0.778     142.4    0.0      1.67e-03 3.34e-03   50.520 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.317    0.618    -      -           3.06e-03 1.01e-03   59.000 57
CPL   1.326    1.326    9999.4    0.0      3.06e-03 2.81e-02   59.000 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: 17.152000 sec.
T50 in the 50-300 keV band: 9.088000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   29.864   -6.180   23.684
T90    25.844   -4.388   21.456
T50    10.492    3.156   13.648
Peak    1.000    8.116    9.116

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
  141.3850    31.7434   0.0166    18.2570   125.8385         0.6352899     11.495 TRIG_00411248                 
 
Foreground time interval of the image:
 -6.180  23.684 (delta_t =  29.864 [sec])
Background time interval of the image:
-239.576  -6.180 (delta_t = 233.396 [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   -6.180 sec. to   23.684 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.57800     ( -0.242973   0.250436 )
Norm@50keV  : 1.30009E-03    ( -0.000196586   0.000192431 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.65 using 59 PHA bins.
# Reduced chi-squared =         0.8886 for     57 degrees of freedom 
# Null hypothesis probability =   7.106665e-01
 
Photon flux (15-150 keV)    in 29.86 sec: 0.165949 ( -0.0224239  0.0224297 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.64065e-07 ( -5.94689e-08  6.09965e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -6.180 sec. to   23.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37946     ( -1.1158   0.440091 )
Epeak [keV] : 142.423      ( -143.301 -143.301 )
Norm@50keV  : 1.66932E-03    ( -0.00166599   0.00501323 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.52 using 59 PHA bins.
# Reduced chi-squared =         0.9022 for     56 degrees of freedom 
# Null hypothesis probability =   6.815298e-01
 
Photon flux (15-150 keV)    in 29.86 sec: 0.164521 ( -0.023465  0.02328 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.5623e-07 ( -7.00772e-08  6.73791e-08 ) ergs/cm2

Band function

Time interval is from   -6.180 sec. to   23.684 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97368   ( -4.97368   -4.97368 )
beta        : -1.62317    ( -0.283283   0.260216 )
Epeak [keV] : 20.9670      ( -20.967 6.74652 )
Norm@50keV   : 426.482    ( -57.4214   867804 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.25 using 59 PHA bins.
# Reduced chi-squared =         0.9137 for     55 degrees of freedom 
# Null hypothesis probability =   6.562983e-01
 
Photon flux (15-150 keV)    in 29.86 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.5568e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 12.8726  (-2.09239  2.58949)
R^2/D10^2   : 3.15644E-02  (-0.0150811   0.0278858)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.36 using 59 PHA bins.
# Reduced chi-squared =          1.094 for     57 degrees of freedom 
# Null hypothesis probability =   2.915259e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.313e-08   9.057e-09
25- 50  1.129e-07   2.474e-08
50-150  1.176e-07   3.867e-08
15-150  2.636e-07   5.324e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 177.141       (      )
Norm        : 0.678370       (-0.0940562     0.113707)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.55 using 59 PHA bins.
# Reduced chi-squared =         0.8869 for     57 degrees of freedom 
# Null hypothesis probability =   7.140369e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.070e-08   2.861e-08
25- 50  9.675e-08   5.220e-08
50-150  2.074e-07   1.165e-07
15-150  3.549e-07   1.917e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.44004        (-2.58496      -5.45039)
R1^2/D10^2  : 0.407286        (-0.35122      1.16476)
kT2 [keV]   : 20.4246        (-6.27614      -20.4855)
R2^2/D10^2  : 5.02423E-03    (-0.00494672   0.00669317)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.62 using 59 PHA bins.
# Reduced chi-squared =         0.9386 for     55 degrees of freedom 
# Null hypothesis probability =   6.043967e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.293e-08   2.904e-08
25- 50  9.317e-08   4.948e-08
50-150  1.893e-07   1.078e-07
15-150  3.354e-07   1.788e-07

Peak spectrum fit

Power-law model

Time interval is from    8.116 sec. to    9.116 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.31696     ( -0.633413   0.60323 )
Norm@50keV  : 3.06110E-03    ( -0.00102008   0.00100506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.00 using 59 PHA bins.
# Reduced chi-squared =          1.035 for     57 degrees of freedom 
# Null hypothesis probability =   4.023156e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.366362 ( -0.120768  0.121101 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.01257e-08 ( -1.10915e-08  1.15264e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    8.116 sec. to    9.116 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.32558     ( -2.05398   0.598241 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 3.06005E-03    ( -0.00307148   0.0530297 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.00 using 59 PHA bins.
# Reduced chi-squared =          1.054 for     56 degrees of freedom 
# Null hypothesis probability =   3.663716e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.366527 ( -0.121111  0.120738 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.99378e-08 ( -1.18898e-08  1.15766e-08 ) ergs/cm2

Band function

Time interval is from    8.116 sec. to    9.116 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97254   ( -4.97254   -4.97254 )
beta        : -1.54392    ( -1.13703   0.770554 )
Epeak [keV] : 29.5691      ( -29.5691 54.3466 )
Norm@50keV   : 103.678    ( -33.4559   2.1391e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.64 using 59 PHA bins.
# Reduced chi-squared =          1.066 for     55 degrees of freedom 
# Null hypothesis probability =   3.435790e-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]    : 15.0185  (-6.2879  14.3288)
R^2/D10^2   : 4.11218E-02  (-0.0404406   0.229487)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.38 using 59 PHA bins.
# Reduced chi-squared =          1.094 for     57 degrees of freedom 
# Null hypothesis probability =   2.909068e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.941e-09   1.262e-09
25- 50  7.723e-09   4.895e-09
50-150  1.186e-08   7.855e-09
15-150  2.153e-08   1.367e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (-199.363      -199.363)
Norm        : 1.50315       (-0.493521     0.493521)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.52 using 59 PHA bins.
# Reduced chi-squared =          1.044 for     57 degrees of freedom 
# Null hypothesis probability =   3.839980e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.743e-09   2.390e-09
25- 50  7.200e-09   4.606e-09
50-150  1.579e-08   9.885e-09
15-150  2.673e-08   1.670e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.23227        (-4.56036      7.38787)
R1^2/D10^2  : 0.260635        (-0.229867      3.81658)
kT2 [keV]   : 60.8049        (-62.2046      -62.2047)
R2^2/D10^2  : 5.14495E-04    (-0.000472216   0.0267064)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.20 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     55 degrees of freedom 
# Null hypothesis probability =   3.582839e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.438e-09   2.101e-09
25- 50  7.329e-09   4.564e-09
50-150  2.112e-08   1.243e-08
15-150  3.188e-08   1.632e-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: 1.57800     ( -0.242973   0.250436 )
Norm@50keV  : 1.30009E-03    ( -0.000196586   0.000192431 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.65 using 59 PHA bins.
# Reduced chi-squared =         0.8886 for     57 degrees of freedom 
# Null hypothesis probability =   7.106665e-01
 
Photon flux (15-150 keV)    in 29.86 sec: 0.165949 ( -0.0224239  0.0224297 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.64065e-07 ( -5.94689e-08  6.09965e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37946     ( -1.1158   0.440091 )
Epeak [keV] : 142.423      ( -143.301 -143.301 )
Norm@50keV  : 1.66932E-03    ( -0.00166599   0.00501323 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.52 using 59 PHA bins.
# Reduced chi-squared =         0.9022 for     56 degrees of freedom 
# Null hypothesis probability =   6.815298e-01
 
Photon flux (15-150 keV)    in 29.86 sec: 0.164521 ( -0.023465  0.02328 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.5623e-07 ( -7.00772e-08  6.73791e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97368   ( -4.97368   -4.97368 )
beta        : -1.62317    ( -0.283283   0.260216 )
Epeak [keV] : 20.9670      ( -20.967 6.74652 )
Norm@50keV   : 426.482    ( -57.4214   867804 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.25 using 59 PHA bins.
# Reduced chi-squared =         0.9137 for     55 degrees of freedom 
# Null hypothesis probability =   6.562983e-01
 
Photon flux (15-150 keV)    in 29.86 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.5568e-07 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 9.34e-08
S(50-100 keV) = 1.25e-07

T90 vs. Hardness ratio plot

T90                                   = 25.8439999222755 sec.
Hardness ratio (energy fluence ratio) = 1.33833

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.13521
Count Ratio (50-100 keV) / (15-25 keV) = 0.781128

Mask shadow pattern

IMX = -1.931497594487454E-01, IMY = -2.674294408718210E-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:
-239.576000 -6.180000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4647 -40.5509    9.2  58.7  -10.4   1.2541   1.3    2.9	Vela X-1

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

Time interval of the image:
-6.180000 23.684000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6346 -40.5840    7.4  58.6  -10.6   0.5045   1.6    5.1	Vela X-1                      
141.3850  31.7434    1.0  18.3  125.8   0.6353  11.5 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
154.124600 962.452300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6281  22.0124    0.4  51.9  175.0  30.8528  27.0    0.3	Crab                          
 87.3452  26.7752    2.7  47.0  179.2   3.3576   4.3 ------	UNKNOWN                       
200.7851  52.1856    3.5  47.0  -53.2   7.2305   3.3 ------	UNKNOWN

Plot creation:
Sun May 31 02:18:05 EDT 2015