batgrbproduct analysis for trigger=337073

batgrbproduct Analysis for Trigger=337073

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 20:06:18 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger337073
======================================================================

  Trigger: 00337073      Segment: 000

  BAT Trigger Time: 250633177.536   [s; MET]
      Trigger Stop: 250633179.584   [s; MET]
               UTC: 2008-12-10T20:19:34.212340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 70.4580954461975   Dec: -11.2656778579067  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.2
     Image Trigger?:     NO
     Rate S/N Ratio:     10.6770782520313  [ if not an image trigger ]
     Image S/N Ratio:    8.2

  Flight Position:   [ source = BAT ]
    RA: 70.4580954461975   Dec: -11.2656778579067  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 70.4863391035201   Dec: -11.2648243025026  [deg; J2000]  
        { 04h 41m 56.7s , -11d 15' 53.4" }
         +/- 0.982897022927068 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.384976049142439 [arcmin] (formal 1-sigma fit error)
    SNR: 31.1760585970009
 
  Angular difference between Flight and Ground position is 1.662759 arcmin
 
  Partial Coding Fraction: 0.9609375    [ including projection effects ]

  Duration
     T90: 145.908000022173 +/- 7.02823676443138
        Measured from: -8.77600002288818
                   to: 137.131999999285     [s; relative to TRIGTIME]
     T50: 17.4840000271797 +/- 2.95609741899295
        Measured from: 1.59199997782707
                   to: 19.0760000050068     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 17.9679999947548     
                   to: 18.9679999947548     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -12.8680000007153     
                   to: 142.979999989271     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.779624   1.073093   0.887040   0.218520
           0.063218   0.067346   0.063591   0.066884 [error]
 Peak      0.077121   0.109189   0.106044   0.032463
           0.006174   0.006871   0.006621   0.005911 [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 2.17e-07 4.30e-07 6.63e-07 2.24e-06 1.85e-06 3.55e-06   erg/cm2
              Error 2.77e-08 3.15e-08 6.36e-08 4.85e-07 1.53e-07 5.29e-07   erg/cm2
Peak flux Power-law 6.61e-01 7.82e-01 6.67e-01 9.68e-01 2.45e+00 3.08e+00   ph/cm2/s
              Error 8.29e-02 5.79e-02 5.39e-02 1.70e-01 1.62e-01 2.20e-01   ph/cm2/s
 
Fluence   Cutoff-PL 2.18e-07 4.31e-07 6.63e-07 2.21e-06 1.85e-06 3.52e-06   erg/cm2
              Error 2.79e-08 2.78e-08 6.30e-08 5.96e-07 1.52e-07 6.34e-07   erg/cm2
Peak flux Cutoff-PL 6.60e-01 7.82e-01 6.68e-01 9.61e-01 2.45e+00 3.07e+00   ph/cm2/s
              Error 6.22e-02 5.97e-02 5.75e-02 -------- 1.61e-01 3.24e-01   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    1.376    0.134    -      -           1.23e-03 8.67e-05   54.510 57
CPL   1.373    0.243    10000.0    0.0      1.23e-03 8.59e-05   54.530 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.229    0.120    -      -           2.08e-02 1.36e-03   53.190 57
CPL   1.225    0.292    9998.3    0.0      2.09e-02 7.39e-03   53.190 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: 30.912000 sec.
T50 in the 50-300 keV band: 18.112000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  155.848  -12.868  142.980
T90   145.908   -8.776  137.132
T50    17.484    1.592   19.076
Peak    1.000   17.968   18.968

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
   70.4863   -11.2648   0.0062    14.4854    28.6639         2.3870557     31.176 TRIG_00337073                 
 
Foreground time interval of the image:
-12.868  24.365 (delta_t =  37.233 [sec])
Background time interval of the image:
-94.435 -12.868 (delta_t =  81.567 [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 2.048000

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 2.048000

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 2.048000

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  -12.868 sec. to  142.980 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37641     ( -0.133815   0.134315 )
Norm@50keV  : 1.22567E-03    ( -8.6905e-05   8.64901e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.51 using 59 PHA bins.
# Reduced chi-squared =         0.9563 for     57 degrees of freedom 
# Null hypothesis probability =   5.690848e-01
 
Photon flux (15-150 keV)    in 155.8 sec: 0.148484 ( -0.0103106  0.0103275 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.8543e-06 ( -1.52074e-07  1.54014e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -12.868 sec. to  142.980 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37337     ( -0.331183   0.154438 )
Epeak [keV] : 1.00000E+04      (   )
Norm@50keV  : 1.23011E-03    ( -8.74908e-05   8.43032e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.53 using 59 PHA bins.
# Reduced chi-squared =         0.9737 for     56 degrees of freedom 
# Null hypothesis probability =   5.308344e-01
 
Photon flux (15-150 keV)    in 155.8 sec: 0.148443 ( -0.010316  0.010296 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.85266e-06 ( -1.5164e-07  1.51858e-07 ) ergs/cm2

Band function

Time interval is from  -12.868 sec. to  142.980 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.12529   ( 1.12529   1.12529 )
beta        : -1.37640    ( -0.13433   0.133822 )
Epeak [keV] : 33.9094      ( -33.9094 -33.9094 )
Norm@50keV   : 2.37620E-03    ( -0.000932872   0.175964 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.51 using 59 PHA bins.
# Reduced chi-squared =         0.9911 for     55 degrees of freedom 
# Null hypothesis probability =   4.933231e-01
 
Photon flux (15-150 keV)    in 155.8 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]    : 15.9645  (-1.59803  1.835)
R^2/D10^2   : 1.32956E-02  (-0.00405032   0.00572607)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         111.76 using 59 PHA bins.
# Reduced chi-squared =         1.9607 for     57 degrees of freedom 
# Null hypothesis probability =   2.013744e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.092e-07   1.519e-08
25- 50  4.587e-07   4.183e-08
50-150  8.164e-07   1.236e-07
15-150  1.384e-06   1.347e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.602072       (-0.0418754     0.0418757)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.24 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     57 degrees of freedom 
# Null hypothesis probability =   3.264399e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.349e-07   2.111e-08
25- 50  4.518e-07   5.835e-08
50-150  9.909e-07   3.449e-07
15-150  1.677e-06   3.759e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.38229        (-1.55182      1.89411)
R1^2/D10^2  : 0.203985        (-0.118562      0.316707)
kT2 [keV]   : 28.7316        (-6.06417      12.441)
R2^2/D10^2  : 1.62441E-03    (-0.00108825   0.00198444)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.99 using 59 PHA bins.
# Reduced chi-squared =          1.036 for     55 degrees of freedom 
# Null hypothesis probability =   4.007620e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.205e-07   7.439e-08
25- 50  4.159e-07   1.158e-07
50-150  1.229e-06   3.985e-07
15-150  1.865e-06   5.293e-07

Peak spectrum fit

Power-law model

Time interval is from   17.968 sec. to   18.968 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22881     ( -0.120588   0.1204 )
Norm@50keV  : 2.08260E-02    ( -0.00136442   0.00136214 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.19 using 59 PHA bins.
# Reduced chi-squared =         0.9331 for     57 degrees of freedom 
# Null hypothesis probability =   6.189046e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.45493 ( -0.161863  0.162016 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.0961e-07 ( -1.59295e-08  1.60617e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   17.968 sec. to   18.968 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.22467     ( -0.459984   0.123199 )
Epeak [keV] : 9998.34      (   )
Norm@50keV  : 2.09223E-02    ( -0.00137083   0.0134036 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.19 using 59 PHA bins.
# Reduced chi-squared =         0.9498 for     56 degrees of freedom 
# Null hypothesis probability =   5.820558e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.45406 ( -0.16137  0.16161 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.09727e-07 ( -1.7594e-08  1.5869e-08 ) ergs/cm2

Band function

Time interval is from   17.968 sec. to   18.968 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.927690   ( 0.92624   0.92624 )
beta        : -1.22978    ( 1.22981   0.121446 )
Epeak [keV] : 68.5074      ( -67.4609 -67.4609 )
Norm@50keV   : 3.75654E-02    ( -0.0144586   1.30735e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.18 using 59 PHA bins.
# Reduced chi-squared =         0.9669 for     55 degrees of freedom 
# Null hypothesis probability =   5.444699e-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]    : 18.4143  (-1.67514  1.88632)
R^2/D10^2   : 0.144387  (-0.0390891   0.0528416)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         105.71 using 59 PHA bins.
# Reduced chi-squared =         1.8545 for     57 degrees of freedom 
# Null hypothesis probability =   9.436841e-05
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.729e-09   1.328e-09
25- 50  4.576e-08   4.795e-09
50-150  1.133e-07   1.330e-08
15-150  1.687e-07   1.485e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 10.0083       (-0.661269     0.661235)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          73.19 using 59 PHA bins.
# Reduced chi-squared =          1.284 for     57 degrees of freedom 
# Null hypothesis probability =   7.297237e-02
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.492e-08   1.825e-09
25- 50  4.795e-08   5.575e-09
50-150  1.052e-07   3.278e-08
15-150  1.780e-07   3.780e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 5.98201        (-1.34148      1.78758)
R1^2/D10^2  : 3.59936        (-2.13646      6.05882)
kT2 [keV]   : 27.4800        (-4.25008      7.06647)
R2^2/D10^2  : 3.47448E-02    (-0.0181766   0.0260962)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.38 using 59 PHA bins.
# Reduced chi-squared =         0.9706 for     55 degrees of freedom 
# Null hypothesis probability =   5.365981e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.137e-08   7.568e-09
25- 50  4.257e-08   1.026e-08
50-150  1.426e-07   2.991e-08
15-150  2.065e-07   4.145e-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: 1.38211     ( -0.0907628   0.0908322 )
Norm@50keV  : 4.11622E-03    ( -0.000191961   0.000191339 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.51 using 59 PHA bins.
# Reduced chi-squared =          1.237 for     57 degrees of freedom 
# Null hypothesis probability =   1.077967e-01
 
Photon flux (15-150 keV)    in 37.23 sec: 0.499281 ( -0.0234154  0.0234759 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.48628e-06 ( -7.93695e-08  8.00043e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.38307     ( -0.163536   0.0877752 )
Epeak [keV] : 9999.30      ( -9999.36 -9999.36 )
Norm@50keV  : 4.12315E-03    ( -0.0001912   0.000867577 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.55 using 59 PHA bins.
# Reduced chi-squared =          1.260 for     56 degrees of freedom 
# Null hypothesis probability =   9.122320e-02
 
Photon flux (15-150 keV)    in 37.23 sec: 0.499203 ( -0.023481  0.023293 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.48611e-06 ( -7.89686e-08  7.69395e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.985318   ( 0.983771   0.983771 )
beta        : -1.39425    ( -0.118885   0.101643 )
Epeak [keV] : 69.8508      ( -70.4504 -70.4504 )
Norm@50keV   : 7.85677E-03    ( -0.00286427   469671 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.42 using 59 PHA bins.
# Reduced chi-squared =          1.280 for     55 degrees of freedom 
# Null hypothesis probability =   7.865955e-02
 
Photon flux (15-150 keV)    in 37.23 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)  = 4.30e-07
S(50-100 keV) = 6.63e-07

T90 vs. Hardness ratio plot

T90                                   = 145.908000022173 sec.
Hardness ratio (energy fluence ratio) = 1.54186

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.37642
Count Ratio (50-100 keV) / (15-25 keV) = 1.13778

Mask shadow pattern

IMX = 2.266851828296420E-01, IMY = -1.239211919727717E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 2.048000

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:
-94.435410 -12.868000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5197 -40.4898    5.2  49.4 -145.3   0.6094   2.2    3.9	Vela X-1                      
 74.6377   9.2833    2.4  29.7   70.3   0.8533   4.9 ------	UNKNOWN                       
 39.1517  -0.6456    2.5  46.8   15.4   1.1322   4.6 ------	UNKNOWN

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

Time interval of the image:
-12.868000 24.364600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6107 -40.3593   37.2  49.4 -145.5  -0.0656  -0.3   12.3	Vela X-1                      
 96.6791  11.9183    2.0  33.9  111.7   1.0030   5.8 ------	UNKNOWN                       
103.7800  -1.4947    2.5  26.9  138.7   0.4779   4.6 ------	UNKNOWN                       
 70.4863 -11.2648    0.4  14.5   28.7   2.3872  31.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
60.964600 962.532400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6405  22.0244    0.5  35.7   99.0  35.2790  21.7    0.7	Crab                          
 48.4703  -8.8567    2.3  21.8   -8.0   2.6294   4.9 ------	UNKNOWN

Plot creation:
Sun May 31 05:21:38 EDT 2015