batgrbproduct analysis for trigger=350854

batgrbproduct Analysis for Trigger=350854

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): Sun Jan 19 17:04:57 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger350854
======================================================================

  Trigger: 00350854      Segment: 000

  BAT Trigger Time: 262675808.064   [s; MET]
      Trigger Stop: 262675809.088   [s; MET]
               UTC: 2009-04-29T05:30:03.365540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 210.703996637861   Dec: 32.1634408652192  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.91
     Image Trigger?:     NO
     Rate S/N Ratio:     24.6981780704569  [ if not an image trigger ]
     Image S/N Ratio:    12.91

  Flight Position:   [ source = BAT ]
    RA: 210.703996637861   Dec: 32.1634408652192  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 210.673873097901   Dec: 32.1710159410349  [deg; J2000]  
        { 14h 02m 41.7s , +32d 10' 15.7" }
         +/- 1.22639967138261 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.40503102613087 [arcmin] (formal 1-sigma fit error)
    SNR: 22.7248591822103
 
  Angular difference between Flight and Ground position is 1.596053 arcmin
 
  Partial Coding Fraction: 0.84375    [ including projection effects ]

  Duration
     T90: 5.58000001311302 +/- 0.994370163931796
        Measured from: -3.65600001811981
                   to: 1.92399999499321     [s; relative to TRIGTIME]
     T50: 2.45600000023842 +/- 0.272968854266336
        Measured from: -1.89599999785423
                   to: 0.560000002384186     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.280000001192093     
                   to: 0.719999998807907     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -4.46000000834465     
                   to: 2.47999998927116     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.215565   0.293168   0.135516   0.000577
           0.015594   0.016573   0.014284   0.012179 [error]
 Peak      0.052691   0.085703   0.046581   0.010818
           0.006276   0.006861   0.005823   0.004904 [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 7.50e-08 1.09e-07 1.17e-07 2.35e-07 3.73e-07 5.36e-07   erg/cm2
              Error 7.76e-09 7.73e-09 1.34e-08 5.35e-08 3.14e-08 6.77e-08   erg/cm2
Peak flux Power-law 6.10e-01 5.47e-01 3.38e-01 3.17e-01 1.63e+00 1.81e+00   ph/cm2/s
              Error 8.96e-02 5.39e-02 4.74e-02 8.56e-02 1.60e-01 1.81e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.59e-08 1.26e-07 1.09e-07 3.66e-08 3.29e-07 3.38e-07   erg/cm2
              Error 9.07e-09 1.14e-08 1.74e-08 -------- 3.49e-08 4.80e-08   erg/cm2
Peak flux Cutoff-PL 5.46e-01 6.18e-01 3.41e-01 9.39e-02 1.58e+00 1.60e+00   ph/cm2/s
              Error 1.02e-01 5.90e-02 5.66e-02 9.56e-02 1.64e-01 1.85e-01   ph/cm2/s
 
Fluence        Band 6.39e-08 1.28e-07 1.05e-07 9.91e-08 3.39e-07 3.97e-07   erg/cm2
              Error 9.32e-09 1.19e-08 1.67e-08 7.09e-08 -------- 6.50e-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    1.892    0.128    -      -           5.85e-03 4.94e-04   60.810 57
CPL   0.543    0.741      45.3    6.9      3.45e-02 4.31e-02   47.280 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.696    0.165    -      -           1.23e-02 1.34e-03   60.930 57
CPL   0.653    0.874      56.1   26.4      4.76e-02 7.53e-02   55.540 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: 2.752000 sec.
T50 in the 50-300 keV band: 1.728000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100    6.940   -4.460    2.480
T90     5.580   -3.656    1.924
T50     2.456   -1.896    0.560
Peak    1.000   -0.280    0.720

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
  210.6739    32.1710   0.0084    24.5118    14.4888         0.6748067     22.725 TRIG_00350854                 
 
Foreground time interval of the image:
 -4.460   2.480 (delta_t =   6.940 [sec])
Background time interval of the image:
-239.064  -4.460 (delta_t = 234.604 [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

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)

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   -4.460 sec. to    2.480 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.89172     ( -0.125964   0.129911 )
Norm@50keV  : 5.84995E-03    ( -0.000496972   0.000491087 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.81 using 59 PHA bins.
# Reduced chi-squared =          1.067 for     57 degrees of freedom 
# Null hypothesis probability =   3.405497e-01
 
Photon flux (15-150 keV)    in 6.94 sec: 0.836594 ( -0.0599438  0.0599682 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.73229e-07 ( -3.11716e-08  3.15773e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -4.460 sec. to    2.480 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.542607     ( -0.805904   0.675867 )
Epeak [keV] : 45.2509      ( -5.44932 8.40346 )
Norm@50keV  : 3.44535E-02    ( -0.0201635   0.0659944 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.28 using 59 PHA bins.
# Reduced chi-squared =         0.8443 for     56 degrees of freedom 
# Null hypothesis probability =   7.902438e-01
 
Photon flux (15-150 keV)    in 6.94 sec: 0.793427 ( -0.062833  0.063115 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.2906e-07 ( -3.37874e-08  3.60686e-08 ) ergs/cm2

Band function

Time interval is from   -4.460 sec. to    2.480 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.39141E-02   ( -0.993882   1.86629 )
beta        : -2.69349    ( 2.69224   0.507909 )
Epeak [keV] : 41.3908      ( -8.09001 9.78711 )
Norm@50keV   : 6.75294E-02    ( -0.0705385   1.23925 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.11 using 59 PHA bins.
# Reduced chi-squared =         0.8384 for     55 degrees of freedom 
# Null hypothesis probability =   7.977323e-01
 
Photon flux (15-150 keV)    in 6.94 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.39381e-07 ( 0  0 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 10.6593  (-0.785402  0.856588)
R^2/D10^2   : 0.316380  (-0.080715   0.107139)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.69 using 59 PHA bins.
# Reduced chi-squared =          1.082 for     57 degrees of freedom 
# Null hypothesis probability =   3.119939e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.176e-08   6.406e-09
25- 50  1.405e-07   1.107e-08
50-150  8.795e-08   1.530e-08
15-150  2.802e-07   2.311e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 76.5727       (-15.5562      22.5017)
Norm        : 4.01369       (-0.423165     0.482631)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.74 using 59 PHA bins.
# Reduced chi-squared =         0.8902 for     57 degrees of freedom 
# Null hypothesis probability =   7.075507e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.206e-08   7.107e-09
25- 50  1.173e-07   8.120e-09
50-150  1.608e-07   3.050e-08
15-150  3.502e-07   3.706e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.70854        (-3.47488      1.95656)
R1^2/D10^2  : 0.745015        (-0.316183      2.57529)
kT2 [keV]   : 20.0252        (-8.53511      55.7009)
R2^2/D10^2  : 1.50182E-02    (-0.0112367   0.0786034)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.69 using 59 PHA bins.
# Reduced chi-squared =         0.8670 for     55 degrees of freedom 
# Null hypothesis probability =   7.474856e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.202e-08   2.028e-08
25- 50  1.286e-07   4.963e-08
50-150  1.399e-07   6.796e-08
15-150  3.305e-07   1.198e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.280 sec. to    0.720 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.69573     ( -0.162968   0.16787 )
Norm@50keV  : 1.22793E-02    ( -0.00134963   0.00133194 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.93 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     57 degrees of freedom 
# Null hypothesis probability =   3.364546e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.62840 ( -0.159638  0.159673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.1373e-07 ( -1.30506e-08  1.32395e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.280 sec. to    0.720 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.653388     ( -0.96332   0.784824 )
Epeak [keV] : 56.0630      ( -10.8404 41.9069 )
Norm@50keV  : 4.75687E-02    ( -0.0301273   0.120453 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.54 using 59 PHA bins.
# Reduced chi-squared =         0.9919 for     56 degrees of freedom 
# Null hypothesis probability =   4.920764e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.57656 ( -0.16392  0.16427 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03051e-07 ( -1.4459e-08  1.5256e-08 ) ergs/cm2

Band function

Time interval is from   -0.280 sec. to    0.720 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.80862   ( -1.78136   -0.705553 )
beta        : -2.09643    ( 2.12742   0.360572 )
Epeak [keV] : 34.4648      ( -11.4385 21.358 )
Norm@50keV   : 2.52644    ( -2.56076   238.26 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.12 using 59 PHA bins.
# Reduced chi-squared =         0.9657 for     55 degrees of freedom 
# Null hypothesis probability =   5.469581e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.07693e-07 ( -1.07686e-07  -1.38063e-08 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 11.6304  (-1.22393  1.3899)
R^2/D10^2   : 0.462588  (-0.157923   0.233451)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.76 using 59 PHA bins.
# Reduced chi-squared =          1.171 for     57 degrees of freedom 
# Null hypothesis probability =   1.766871e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.319e-08   2.115e-09
25- 50  3.999e-08   4.580e-09
50-150  3.184e-08   7.765e-09
15-150  8.502e-08   1.057e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 117.062       (-37.088      71.0109)
Norm        : 7.04010       (-0.825584     0.997564)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.15 using 59 PHA bins.
# Reduced chi-squared =          1.003 for     57 degrees of freedom 
# Null hypothesis probability =   4.694645e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.835e-08   2.325e-09
25- 50  3.269e-08   4.740e-09
50-150  5.763e-08   2.345e-08
15-150  1.087e-07   2.991e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.12400        (-2.53663      2.61902)
R1^2/D10^2  : 1.23595        (-0.67265      2.20879)
kT2 [keV]   : 25.4814        (-9.97362      -25.5085)
R2^2/D10^2  : 1.51224E-02    (-0.0146033   0.0632028)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.79 using 59 PHA bins.
# Reduced chi-squared =         0.9780 for     55 degrees of freedom 
# Null hypothesis probability =   5.208819e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.660e-08   6.149e-09
25- 50  3.648e-08   1.426e-08
50-150  5.383e-08   2.987e-08
15-150  1.069e-07   4.363e-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: 1.89172     ( -0.125964   0.129911 )
Norm@50keV  : 5.84995E-03    ( -0.000496972   0.000491087 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.81 using 59 PHA bins.
# Reduced chi-squared =          1.067 for     57 degrees of freedom 
# Null hypothesis probability =   3.405497e-01
 
Photon flux (15-150 keV)    in 6.94 sec: 0.836594 ( -0.0599438  0.0599682 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.73229e-07 ( -3.11716e-08  3.15773e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.542607     ( -0.805904   0.675867 )
Epeak [keV] : 45.2509      ( -5.44932 8.40346 )
Norm@50keV  : 3.44535E-02    ( -0.0201635   0.0659944 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.28 using 59 PHA bins.
# Reduced chi-squared =         0.8443 for     56 degrees of freedom 
# Null hypothesis probability =   7.902438e-01
 
Photon flux (15-150 keV)    in 6.94 sec: 0.793427 ( -0.062833  0.063115 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.2906e-07 ( -3.37874e-08  3.60686e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -9.39141E-02   ( -0.993882   1.86629 )
beta        : -2.69349    ( 2.69224   0.507909 )
Epeak [keV] : 41.3908      ( -8.09001 9.78711 )
Norm@50keV   : 6.75294E-02    ( -0.0705385   1.23925 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.11 using 59 PHA bins.
# Reduced chi-squared =         0.8384 for     55 degrees of freedom 
# Null hypothesis probability =   7.977323e-01
 
Photon flux (15-150 keV)    in 6.94 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.39381e-07 ( 0  0 ) ergs/cm2

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

S(25-50 keV)  = 1.09e-07
S(50-100 keV) = 1.17e-07

T90 vs. Hardness ratio plot

T90                                   = 5.58000001311302 sec.
Hardness ratio (energy fluence ratio) = 1.07339

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.36
Count Ratio (50-100 keV) / (15-25 keV) = 0.628655

Mask shadow pattern

IMX = 4.414730130639879E-01, IMY = -1.140805154572180E-01

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:
-239.064000 -4.460000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
147.5139 -21.4153    2.8  56.2 -164.5   2.6926   4.1 ------	UNKNOWN                       
166.4651  64.7459    2.4  50.3  -45.5   4.9763   4.9 ------	UNKNOWN

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

Time interval of the image:
-4.460000 2.480000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
210.6739  32.1710    0.5  24.5   14.5   0.6749  22.7 ------	UNKNOWN                       
215.6232  65.3358    2.2  51.5  -19.4   0.3537   5.3 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
76.836600 962.976000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4963  35.3272   21.2  36.2   -9.2  -0.2855  -0.5    2.1	Her X-1                       
185.6349   0.7337    2.6  39.3  140.1   4.4364   4.5 ------	UNKNOWN                       
271.2300  19.5060    2.6  55.2    5.6   9.6951   4.5 ------	UNKNOWN                       
216.6829  49.2793    3.2  17.7  -69.0   1.5342   3.6 ------	UNKNOWN

Plot creation:
Sun May 31 04:11:40 EDT 2015