batgrbproduct analysis for trigger=594081

batgrbproduct Analysis for Trigger=594081

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): Sat Oct  4 23:54:38 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger594081
======================================================================

  Trigger: 00594081      Segment: 000

  BAT Trigger Time: 417937800   [s; MET]
      Trigger Stop: 417938120   [s; MET]
               UTC: 2014-03-31T05:49:48.173160    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 134.844638913522   Dec: 2.7069009242252  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     NO    [ by BAT flight software ]
     Image S/N Ratio:    7.74
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.74

  Flight Position:   [ source = BAT ]
    RA: 134.844638913522   Dec: 2.7069009242252  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 134.845   Dec: 2.7069  [deg; J2000]
        { 08h 59m 22.8s , +02d 42' 24.8" }
        +/- 2.66726357538 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.49047876878
 
 
  Angular difference between Flight and Ground position is 0.021641 arcmin
 
  Partial Coding Fraction: 0.984375    [ including projection effects ]

  Duration
     T90: 209.655999958515 +/- 32.7518243973476
        Measured from: 91.1679999828339
                   to: 300.823999941349     [s; relative to TRIGTIME]
     T50: 75.3319999575615 +/- 61.6366541549359
        Measured from: 158.772000014782
                   to: 234.103999972343     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 188.523999989033     
                   to: 189.523999989033     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 72.0720000267029     
                   to: 321.167999982834     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.556618   0.574071   0.305876   0.037949
           0.076096   0.077855   0.067586   0.058168 [error]
 Peak      0.011352   0.012668   0.002277   0.012761
           0.005020   0.004850   0.004347   0.003897 [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 1.53e-07 2.12e-07 2.18e-07 4.09e-07 7.13e-07 9.92e-07   erg/cm2
              Error 3.13e-08 3.33e-08 6.11e-08 2.25e-07 1.41e-07 2.96e-07   erg/cm2
Peak flux Power-law 6.80e-02 7.36e-02 5.66e-02 7.12e-02 2.25e-01 2.69e-01   ph/cm2/s
              Error 5.98e-02 5.55e-02 4.58e-02 1.40e-01 1.67e-01 1.41e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.50e-07 2.27e-07 2.04e-07 1.37e-07 6.60e-07 7.17e-07   erg/cm2
              Error 3.29e-08 4.71e-08 8.30e-08 3.17e-07 1.74e-07 3.86e-07   erg/cm2
Peak flux Cutoff-PL 6.85e-02 1.20e-01 5.38e-03 6.98e-02 2.25e-01 2.68e-01   ph/cm2/s
              Error 6.14e-02 -------- -------- 1.39e-01 1.08e-01 2.09e-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    1.961    0.292    -      -           3.11e-04 6.37e-05   65.010 57
CPL   1.418    1.347      40.6    0.0      6.75e-04 0.00e+00   64.420 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.378    1.141    -      -           1.86e-03 9.25e-04   61.570 57
CPL   2.239    1.148      83.9    0.0      5.61e-04 0.00e+00   61.020 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: 0.000000 sec.
T50 in the 50-300 keV band: 0.000000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  249.096   72.072  321.168
T90   209.656   91.168  300.824
T50    75.332  158.772  234.104
Peak    1.000  188.524  189.524

Click here for the BAT GCN circular template

Special notes of this burst

Image

Pre-slew 15.0-50.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
134.845 2.707 0.000 9.049 48.365 1.052 7.490 TRIG_00594081
 
Image time interval: 0.000 to 320.000 [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)

The mask-weighted light curves based on cleaned DPHs

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   72.072 sec. to  321.168 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.96144     ( -0.280467   0.303713 )
Norm@50keV  : 3.10997E-04    ( -6.46295e-05   6.27232e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.01 using 59 PHA bins.
# Reduced chi-squared =          1.140 for     57 degrees of freedom 
# Null hypothesis probability =   2.178893e-01
 
Photon flux (15-150 keV)    in 249.1 sec: 4.58417E-02 ( -0.0070033  0.00700424 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.13196e-07 ( -1.3779e-07  1.44049e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   72.072 sec. to  321.168 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41786     ( -1.79486   0.898686 )
Epeak [keV] : 40.5986      (   )
Norm@50keV  : 6.74503E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.42 using 59 PHA bins.
# Reduced chi-squared =          1.150 for     56 degrees of freedom 
# Null hypothesis probability =   2.057665e-01
 
Photon flux (15-150 keV)    in 249.1 sec: 4.49658E-02 ( -0.0072295  0.0072498 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.59951e-07 ( -1.66616e-07  1.80886e-07 ) ergs/cm2

Band function

Time interval is from   72.072 sec. to  321.168 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.40767   ( -12.5456   -4.40767 )
beta        : -2.33471    ( -0.59593   0.427005 )
Epeak [keV] : 25.3178      ( -5.33979 4.62494 )
Norm@50keV   : 17.9470    ( -2.7049   1149.24 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.09 using 59 PHA bins.
# Reduced chi-squared =          1.129 for     55 degrees of freedom 
# Null hypothesis probability =   2.381836e-01
 
Photon flux (15-150 keV)    in 249.1 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]    : 8.45996  (-1.38087  1.74551)
R^2/D10^2   : 4.09364E-02  (-0.0211574   0.0410317)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.98 using 59 PHA bins.
# Reduced chi-squared =          1.228 for     57 degrees of freedom 
# Null hypothesis probability =   1.159868e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.371e-07   4.080e-08
25- 50  2.639e-07   6.545e-08
50-150  8.301e-08   3.979e-08
15-150  4.840e-07   1.191e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 63.2589       (-24.5403      55.2772)
Norm        : 0.235705       (-0.0534057     0.0727263)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.39 using 59 PHA bins.
# Reduced chi-squared =          1.130 for     57 degrees of freedom 
# Null hypothesis probability =   2.338503e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.488e-07   3.196e-08
25- 50  2.300e-07   4.556e-08
50-150  2.733e-07   1.323e-07
15-150  6.520e-07   1.719e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.42941        (-1.74296      1.8997)
R1^2/D10^2  : 9.59538E-02        (-0.0523349      0.161065)
kT2 [keV]   : 25.5258        (-13.9702      -28.2777)
R2^2/D10^2  : 3.54617E-04    (-0.000267662   0.00320841)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.70 using 59 PHA bins.
# Reduced chi-squared =          1.122 for     55 degrees of freedom 
# Null hypothesis probability =   2.491030e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.539e-07   9.014e-08
25- 50  2.230e-07   1.198e-07
50-150  2.930e-07   1.973e-07
15-150  6.700e-07   3.585e-07

Peak spectrum fit

Power-law model

Time interval is from  188.524 sec. to  189.524 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.37838     ( -1.29892   0.982387 )
Norm@50keV  : 1.85625E-03    ( -0.000953493   0.000897327 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.57 using 59 PHA bins.
# Reduced chi-squared =          1.080 for     57 degrees of freedom 
# Null hypothesis probability =   3.158105e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.224971 ( -0.224971  0.108288 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.80176e-08 ( -9.68601e-09  1.057e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from  188.524 sec. to  189.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 2.23893     ( -1.33504   0.960065 )
Epeak [keV] : 83.9051      ( -9999.36 -9999.36 )
Norm@50keV  : 5.61405E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.02 using 59 PHA bins.
# Reduced chi-squared =          1.090 for     56 degrees of freedom 
# Null hypothesis probability =   3.004013e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.225044 ( -0.107399  0.108038 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.55863e-16 ( 0  0 ) ergs/cm2

Band function

Time interval is from  188.524 sec. to  189.524 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.89946   ( -4.89946   -4.89946 )
beta        : -2.48538    ( 2.48538   1.96499 )
Epeak [keV] : 31.8967      ( -31.8967 13.0848 )
Norm@50keV   : 48.9464    ( -22.1982   1.82858e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.48 using 59 PHA bins.
# Reduced chi-squared =          1.100 for     55 degrees of freedom 
# Null hypothesis probability =   2.844773e-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]    : 8.60854  (-2.82404  6.06692)
R^2/D10^2   : 0.192639  (-0.192711   0.686245)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.99 using 59 PHA bins.
# Reduced chi-squared =          1.088 for     57 degrees of freedom 
# Null hypothesis probability =   3.028554e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.711e-09   1.733e-09
25- 50  5.368e-09   3.543e-09
50-150  1.784e-09   1.463e-09
15-150  9.864e-09   6.675e-09

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.362       (-199.363      -199.363)
Norm        : 0.914504       (-0.439     0.439361)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.90 using 59 PHA bins.
# Reduced chi-squared =          1.086 for     57 degrees of freedom 
# Null hypothesis probability =   3.054898e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.277e-09   1.522e-09
25- 50  4.380e-09   2.985e-09
50-150  9.607e-09   6.460e-09
15-150  1.627e-08   1.080e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 200.000        (-200      -200)
R1^2/D10^2  : 5.17196E-05        (-3.83234e-05      3.94855e-05)
kT2 [keV]   : 7.70898        (-2.68584      3.88252)
R2^2/D10^2  : 0.252795    (-0.177904   1.14609)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.99 using 59 PHA bins.
#Fit statistic : Chi-Squared =          57.37 using 59 PHA bins.
# Reduced chi-squared =          1.127 for     55 degrees of freedom 
# Reduced chi-squared =          1.043 for     55 degrees of freedom 
# Null hypothesis probability =   2.410536e-01
# Null hypothesis probability =   3.872359e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.712e-09   7.815e-01
25- 50  5.367e-09   7.735e+00
50-150  1.782e-09   1.732e+02
15-150  9.862e-09   1.786e+02

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: 1.96144     ( -0.280467   0.303713 )
Norm@50keV  : 3.10997E-04    ( -6.46295e-05   6.27232e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.01 using 59 PHA bins.
# Reduced chi-squared =          1.140 for     57 degrees of freedom 
# Null hypothesis probability =   2.178893e-01
 
Photon flux (15-150 keV)    in 249.1 sec: 4.58417E-02 ( -0.0070033  0.00700424 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.13196e-07 ( -1.3779e-07  1.44049e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41786     ( -1.79486   0.898686 )
Epeak [keV] : 40.5986      (   )
Norm@50keV  : 6.74503E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.42 using 59 PHA bins.
# Reduced chi-squared =          1.150 for     56 degrees of freedom 
# Null hypothesis probability =   2.057665e-01
 
Photon flux (15-150 keV)    in 249.1 sec: 4.49658E-02 ( -0.0072295  0.0072498 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.59951e-07 ( -1.66616e-07  1.80886e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.40767   ( -13.0215   -4.40767 )
beta        : -2.33471    ( -0.59593   0.427005 )
Epeak [keV] : 25.3178      ( -5.33979 4.62494 )
Norm@50keV   : 17.9470    ( -2.7049   1149.24 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.09 using 59 PHA bins.
# Reduced chi-squared =          1.129 for     55 degrees of freedom 
# Null hypothesis probability =   2.381836e-01
 
Photon flux (15-150 keV)    in 249.1 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)  = 2.12e-07
S(50-100 keV) = 2.18e-07

T90 vs. Hardness ratio plot

T90                                   = 209.655999958515 sec.
Hardness ratio (energy fluence ratio) = 1.0283

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.03136
Count Ratio (50-100 keV) / (15-25 keV) = 0.549526

Mask shadow pattern

IMX = 0.105812201967, IMY = -0.119034623563

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:
-10.899410 72.072000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.6812 -40.5209    7.6  37.0  178.2   0.1896   1.5    7.2	Vela X-1                      
 86.9262  18.0486    3.0  46.9  -53.6   1.6012   3.9 ------	UNKNOWN

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

Time interval of the image:
72.072000 321.168000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.7068 -40.6832   69.5  37.1  178.3   0.0667   0.2   11.2	Vela X-1                      
144.9291  -5.8283    2.2  16.1  103.8   1.5385   5.2 ------	UNKNOWN                       
134.8907   2.7534    2.0   9.1   48.4   1.6352   5.7 ------	UNKNOWN                       
102.0040  29.0213    2.2  42.0  -29.3   2.4399   5.2 ------	UNKNOWN                       
106.1504 -29.8722    2.4  33.6 -135.8   1.8173   4.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
372.900600 963.053700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4608 -40.5547    4.7  43.3  172.6   1.4395   2.4    3.1	Vela X-1                      
131.2307 -32.2488    2.9  35.1  178.6   1.7469   4.0 ------	UNKNOWN                       
118.6346   5.5043    2.1  16.4  -86.4   1.7534   5.3 ------	UNKNOWN                       
107.7163 -10.1459    2.7  29.9 -122.6   1.7677   4.3 ------	UNKNOWN                       
 94.5323  12.4708    2.2  41.1  -80.8   8.0827   5.3 ------	UNKNOWN

Plot creation:
Thu Oct  8 20:09:10 EDT 2015