batgrbproduct analysis for trigger=350311

batgrbproduct Analysis for Trigger=350311

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 17:16:52 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger350311
======================================================================

  Trigger: 00350311      Segment: 000

  BAT Trigger Time: 262275134.016   [s; MET]
      Trigger Stop: 262275135.04   [s; MET]
               UTC: 2009-04-24T14:12:09.330200    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 189.537885215137   Dec: 16.8295481175842  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    23.3
     Image Trigger?:     NO
     Rate S/N Ratio:     255.998046867549  [ if not an image trigger ]
     Image S/N Ratio:    23.3

  Flight Position:   [ source = BAT ]
    RA: 189.537885215137   Dec: 16.8295481175842  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 189.530585094208   Dec: 16.8293462274994  [deg; J2000]  
        { 12h 38m 07.3s , +16d 49' 45.6" }
         +/- 0.837448408297704 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.320800297444586 [arcmin] (formal 1-sigma fit error)
    SNR: 39.1902733062376
 
  Angular difference between Flight and Ground position is 0.419423 arcmin
 
  Partial Coding Fraction: 0.1289062    [ including projection effects ]

  Duration
     T90: 49.4600000083447 +/- 2.26859604796511
        Measured from: -0.120000004768372
                   to: 49.3400000035763     [s; relative to TRIGTIME]
     T50: 3.36800000071526 +/- 0.048166349704769
        Measured from: 0.680000007152557
                   to: 4.04800000786781     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0960000157356262     
                   to: 0.903999984264374     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.708000004291534     
                   to: 102.520000010729     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     8.174245  12.340217   9.926880   2.593959
           0.131021   0.152710   0.143717   0.103984 [error]
 Peak      1.757820   2.871438   2.812179   0.878621
           0.048934   0.062862   0.064888   0.041449 [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 3.08e-06 5.55e-06 7.68e-06 2.21e-05 2.21e-05 3.84e-05   erg/cm2
              Error 1.18e-07 1.24e-07 1.61e-07 1.07e-06 4.07e-07 1.14e-06   erg/cm2
Peak flux Power-law 2.04e+01 2.30e+01 1.86e+01 2.51e+01 7.11e+01 8.70e+01   ph/cm2/s
              Error 1.06e+00 7.26e-01 5.41e-01 1.55e+00 1.98e+00 2.27e+00   ph/cm2/s
 
Fluence   Cutoff-PL 2.84e-06 5.61e-06 7.91e-06 1.59e-05 2.18e-05 3.23e-05   erg/cm2
              Error 1.59e-07 1.30e-07 1.94e-07 2.42e-06 4.36e-07 2.44e-06   erg/cm2
Peak flux Cutoff-PL 1.86e+01 2.33e+01 1.94e+01 1.88e+01 6.99e+01 8.01e+01   ph/cm2/s
              Error 1.39e+00 7.69e-01 6.88e-01 3.10e+00 2.08e+00 3.85e+00   ph/cm2/s
 
Fluence        Band -------- -------- -------- -------- -------- --------   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    1.532    0.034    -      -           2.27e-02 4.15e-04   56.880 57
CPL   1.241    0.140     152.8   56.4      3.03e-02 4.11e-03   43.590 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.306    0.046    -      -           5.96e-01 1.54e-02   57.270 57
CPL   0.984    0.188     183.4  102.1      8.26e-01 1.55e-01   48.110 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: 8.192000 sec.
T50 in the 50-300 keV band: 3.008000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  103.228   -0.708  102.520
T90    49.460   -0.120   49.340
T50     3.368    0.680    4.048
Peak    1.000   -0.096    0.904

Click here for the BAT GCN circular template

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  189.5306    16.8293   0.0049    38.7524    56.2910        30.7113191     39.190 TRIG_00350311                 
 
Foreground time interval of the image:
 -0.708  15.685 (delta_t =  16.393 [sec])
Background time interval of the image:
-239.016  -0.708 (delta_t = 238.308 [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   -0.708 sec. to  102.520 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.53208     ( -0.0340119   0.0340019 )
Norm@50keV  : 2.26984E-02    ( -0.000414694   0.000414604 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.88 using 59 PHA bins.
# Reduced chi-squared =         0.9980 for     57 degrees of freedom 
# Null hypothesis probability =   4.793899e-01
 
Photon flux (15-150 keV)    in 103.2 sec: 2.85881 ( -0.0614563  0.0616751 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.21104e-05 ( -4.07335e-07  4.07426e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.708 sec. to  102.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.24148     ( -0.142035   0.137863 )
Epeak [keV] : 152.784      ( -31.3436 81.4075 )
Norm@50keV  : 3.02723E-02    ( -0.00377687   0.0044438 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.59 using 59 PHA bins.
# Reduced chi-squared =         0.7785 for     56 degrees of freedom 
# Null hypothesis probability =   8.864212e-01
 
Photon flux (15-150 keV)    in 103.2 sec: 2.78851 ( -0.06837  0.06881 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.17976e-05 ( -4.36536e-07  4.35607e-07 ) ergs/cm2

Band function

Time interval is from   -0.708 sec. to  102.520 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.24148   ( -0.139535   0.0677946 )
beta        : -10.0000    ( 10   3.37508e-14 )
Epeak [keV] : 152.760      ( -31.3276 81.3846 )
Norm@50keV   : 3.02685E-02    ( -0.00377684   0.00444491 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.59 using 59 PHA bins.
# Reduced chi-squared =         0.7926 for     55 degrees of freedom 
# Null hypothesis probability =   8.661808e-01
 
Photon flux (15-150 keV)    in 103.2 sec: 2.79326 (    ) 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]    : 17.8432  (  )
R^2/D10^2   : 0.169359  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         634.56 using 59 PHA bins.
# Reduced chi-squared =         11.133 for     57 degrees of freedom 
# Null hypothesis probability =   1.890464e-98
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.117e-06   4.283e-08
25- 50  5.133e-06   1.440e-07
50-150  1.183e-05   3.406e-07
15-150  1.809e-05   3.818e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 11.7160       (-0.212769     0.21276)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.23 using 59 PHA bins.
# Reduced chi-squared =          1.004 for     57 degrees of freedom 
# Null hypothesis probability =   4.663640e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.012e-06   6.760e-08
25- 50  5.794e-06   1.347e-07
50-150  1.271e-05   2.683e-07
15-150  2.151e-05   4.438e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 7.87845        (-0.53954      0.56664)
R1^2/D10^2  : 1.86550        (-0.392307      0.527263)
kT2 [keV]   : 28.7072        (-1.72844      2.06229)
R2^2/D10^2  : 2.55527E-02    (-0.00576446   0.00669876)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.89 using 59 PHA bins.
# Reduced chi-squared =         0.7980 for     55 degrees of freedom 
# Null hypothesis probability =   8.589387e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.485e-06   1.672e-07
25- 50  5.754e-06   2.085e-07
50-150  1.341e-05   5.315e-07
15-150  2.165e-05   6.502e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.096 sec. to    0.904 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.30585     ( -0.0455528   0.0455435 )
Norm@50keV  : 0.595633    ( -0.0154208   0.0154186 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.27 using 59 PHA bins.
# Reduced chi-squared =          1.005 for     57 degrees of freedom 
# Null hypothesis probability =   4.650168e-01
 
Photon flux (15-150 keV)    in 1 sec: 71.1377 ( -1.97786  1.98096 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.87762e-06 ( -1.60963e-07  1.60998e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.096 sec. to    0.904 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.984222     ( -0.191399   0.183783 )
Epeak [keV] : 183.398      ( -47.1196 156.988 )
Norm@50keV  : 0.825770    ( -0.137422   0.171855 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.11 using 59 PHA bins.
# Reduced chi-squared =         0.8591 for     56 degrees of freedom 
# Null hypothesis probability =   7.642037e-01
 
Photon flux (15-150 keV)    in 1 sec: 69.9169 ( -2.0769  2.0825 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.81107e-06 ( 0  0 ) ergs/cm2

Band function

Time interval is from   -0.096 sec. to    0.904 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.821523   ( -0.321772   1.26828 )
beta        : -1.48538    ( 1.48545   0.13435 )
Epeak [keV] : 124.150      ( -79.5375 180.531 )
Norm@50keV   : 1.01785    ( -0.316809   1.84016 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.63 using 59 PHA bins.
# Reduced chi-squared =         0.8660 for     55 degrees of freedom 
# Null hypothesis probability =   7.493769e-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]    : 19.1044  (  )
R^2/D10^2   : 3.72151  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         316.95 using 59 PHA bins.
# Reduced chi-squared =         5.5606 for     57 degrees of freedom 
# Null hypothesis probability =   9.934467e-38
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.665e-07   1.405e-08
25- 50  1.287e-06   4.850e-08
50-150  3.455e-06   1.430e-07
15-150  5.007e-06   1.590e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 300.461       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         148.70 using 59 PHA bins.
# Reduced chi-squared =         2.6088 for     57 degrees of freedom 
# Null hypothesis probability =   4.045556e-10
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.482e-07   2.245e-08
25- 50  1.439e-06   4.350e-08
50-150  3.157e-06   9.200e-08
15-150  5.344e-06   1.470e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.37710        (-0.941536      1.03654)
R1^2/D10^2  : 33.5408        (-9.90123      15.5713)
kT2 [keV]   : 31.1713        (-2.9248      4.02113)
R2^2/D10^2  : 0.582715    (-0.201337   0.247906)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.60 using 59 PHA bins.
# Reduced chi-squared =         0.9928 for     55 degrees of freedom 
# Null hypothesis probability =   4.897498e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  5.260e-07   5.690e-08
25- 50  1.374e-06   8.700e-08
50-150  3.913e-06   2.775e-07
15-150  5.813e-06   3.450e-07

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: 1.45531     ( -0.0315983   0.0315711 )
Norm@50keV  : 0.131513    ( -0.00232836   0.00232742 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.35 using 59 PHA bins.
# Reduced chi-squared =          1.076 for     57 degrees of freedom 
# Null hypothesis probability =   3.229502e-01
 
Photon flux (15-150 keV)    in 16.39 sec: 16.2286 ( -0.333262  0.334251 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.06065e-05 ( -3.63956e-07  3.64015e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.08178     ( -0.134851   0.131137 )
Epeak [keV] : 146.686      ( -23.4585 45.8798 )
Norm@50keV  : 0.189471    ( -0.0222688   0.0259068 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          36.66 using 59 PHA bins.
# Reduced chi-squared =         0.6547 for     56 degrees of freedom 
# Null hypothesis probability =   9.787441e-01
 
Photon flux (15-150 keV)    in 16.39 sec: 15.7710 ( -0.3615  0.3634 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.03141e-05 ( 0  0 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.175448   ( -1.1523   1.38496 )
beta        : -1.56196    ( 1.55823   0.053817 )
Epeak [keV] : 56.2583      ( -15.1722 121.545 )
Norm@50keV   : 0.686075    ( -0.683776   6.91358 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          35.47 using 59 PHA bins.
# Reduced chi-squared =         0.6450 for     55 degrees of freedom 
# Null hypothesis probability =   9.811174e-01
 
Photon flux (15-150 keV)    in 16.39 sec: 15.4834 ( -8.4834  -0.436 ) 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)  = 5.55e-06
S(50-100 keV) = 7.68e-06

T90 vs. Hardness ratio plot

T90                                   = 49.4600000083447 sec.
Hardness ratio (energy fluence ratio) = 1.38378

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.50965
Count Ratio (50-100 keV) / (15-25 keV) = 1.21441

Mask shadow pattern

IMX = 4.454533651138777E-01, IMY = -6.677019518283577E-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:
-239.016000 -0.708000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
161.7822 -24.5859    2.4  44.6  133.9   3.2723   4.8 ------	UNKNOWN

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

Time interval of the image:
-0.708000 15.684620
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
189.5306  16.8293    0.3  38.8   56.3  30.7061  39.2 ------	UNKNOWN                       
130.0437 -24.6704    2.9  46.6  174.5   1.1704   4.0 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
73.284590 963.024000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
246.1553  47.0381    3.7  55.2   -7.6   5.6086   3.2 ------	UNKNOWN                       
216.7503  57.0968    3.0  45.1  -30.9   3.2453   3.8 ------	UNKNOWN                       
159.5772  32.9793    3.2  31.4 -104.9   2.3008   3.6 ------	UNKNOWN                       
172.4443  58.5510    5.1  43.6  -64.3   6.1413   2.2 ------	UNKNOWN

Plot creation:
Sun May 31 04:17:18 EDT 2015