batgrbproduct analysis for trigger=145675

batgrbproduct Analysis for Trigger=145675

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): Wed Jan 22 21:43:35 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger145675
======================================================================

  Trigger: 00145675      Segment: 000

  BAT Trigger Time: 142921742.016   [s; MET]
      Trigger Stop: 142921742.528   [s; MET]
               UTC: 2005-07-13T04:29:02.396820    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 320.536539185524   Dec: 77.0721719432608  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.32
     Image Trigger?:     NO
     Rate S/N Ratio:     31.2729915422238  [ if not an image trigger ]
     Image S/N Ratio:    11.32

  Flight Position:   [ source = BAT ]
    RA: 320.536539185524   Dec: 77.0721719432608  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 320.56737432516   Dec: 77.0719723903794  [deg; J2000]  
        { 21h 22m 16.2s , +77d 04' 19.1" }
         +/- 1.06397059669473 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.345355816260137 [arcmin] (formal 1-sigma fit error)
    SNR: 27.8386060603808
 
  Angular difference between Flight and Ground position is 0.414089 arcmin
 
  Partial Coding Fraction: 0.3046875    [ including projection effects ]

  Duration
     T90: 124.67199999094 +/- 62.407646704848
        Measured from: -52.7439999878407
                   to: 71.9280000030994     [s; relative to TRIGTIME]
     T50: 10.5600000023842 +/- 1.39778108223621
        Measured from: 2.87200000882149
                   to: 13.4320000112057     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.06000000238419     
                   to: 2.06000000238419     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -69.3840000033379     
                   to: 121.33599999547     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.241787   2.883991   2.394183   0.690508
           0.092815   0.097730   0.086758   0.075941 [error]
 Peak      0.110138   0.210724   0.169536   0.074298
           0.011133   0.012580   0.011785   0.009701 [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 7.13e-07 1.29e-06 1.78e-06 5.15e-06 5.13e-06 8.93e-06   erg/cm2
              Error 5.15e-08 5.39e-08 8.83e-08 5.74e-07 2.12e-07 6.28e-07   erg/cm2
Peak flux Power-law 1.22e+00 1.44e+00 1.22e+00 1.77e+00 4.51e+00 5.65e+00   ph/cm2/s
              Error 1.60e-01 1.14e-01 9.76e-02 3.02e-01 3.14e-01 4.04e-01   ph/cm2/s
 
Fluence   Cutoff-PL 6.95e-07 1.30e-06 1.80e-06 4.29e-06 5.08e-06 8.08e-06   erg/cm2
              Error 6.25e-08 6.01e-08 9.47e-08 1.32e-06 2.36e-07 1.22e-06   erg/cm2
Peak flux Cutoff-PL 1.21e+00 1.45e+00 1.23e+00 1.65e+00 4.50e+00 5.53e+00   ph/cm2/s
              Error 1.82e-01 1.23e-01 1.09e-01 4.49e-01 3.22e-01 6.50e-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    1.529    0.072    -      -           2.85e-03 1.09e-04   54.870 57
CPL   1.405    0.221     252.6    0.0      3.27e-03 8.30e-04   54.250 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.234    0.120    -      -           3.82e-02 2.59e-03   66.730 57
CPL   1.176    0.321     753.3    0.0      4.08e-02 1.62e-02   66.680 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: 65.280000 sec.
T50 in the 50-300 keV band: 8.576000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  190.720  -69.384  121.336
T90   124.672  -52.744   71.928
T50    10.560    2.872   13.432
Peak    1.000    1.060    2.060

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
  320.5674    77.0720   0.0069    32.9653   114.3292         5.0628015     27.839 TRIG_00145675                 
 
Foreground time interval of the image:
-69.384   9.485 (delta_t =  78.869 [sec])
Background time interval of the image:
-244.315 -69.384 (delta_t = 174.931 [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 0.512000

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 0.512000

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 0.512000

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  -69.384 sec. to  121.336 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.52889     ( -0.0716782   0.071837 )
Norm@50keV  : 2.84867E-03    ( -0.000109224   0.000109067 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.87 using 59 PHA bins.
# Reduced chi-squared =         0.9626 for     57 degrees of freedom 
# Null hypothesis probability =   5.555126e-01
 
Photon flux (15-150 keV)    in 190.7 sec: 0.358461 ( -0.0145212  0.0145575 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.13006e-06 ( -2.11652e-07  2.12638e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -69.384 sec. to  121.336 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.40526     ( -0.282257   0.159753 )
Epeak [keV] : 252.618      ( -252.618 -252.618 )
Norm@50keV  : 3.26545E-03    ( -0.00050469   0.0011549 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.25 using 59 PHA bins.
# Reduced chi-squared =         0.9688 for     56 degrees of freedom 
# Null hypothesis probability =   5.412890e-01
 
Photon flux (15-150 keV)    in 190.7 sec: 0.355474 ( -0.015779  0.015251 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.08414e-06 ( -2.36735e-07  2.34561e-07 ) ergs/cm2

Band function

Time interval is from  -69.384 sec. to  121.336 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 2.51971   ( -2.51971   -2.51971 )
beta        : -1.54819    ( -0.0766438   0.0755033 )
Epeak [keV] : 23.7524      ( -23.7524 202.603 )
Norm@50keV   : 5.29864    ( -5.29864   262.366 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.12 using 59 PHA bins.
# Reduced chi-squared =         0.9841 for     55 degrees of freedom 
# Null hypothesis probability =   5.081024e-01
 
Photon flux (15-150 keV)    in 190.7 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]    : 15.9599  (  )
R^2/D10^2   : 3.13232E-02  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         212.03 using 59 PHA bins.
# Reduced chi-squared =         3.7198 for     57 degrees of freedom 
# Null hypothesis probability =   1.062673e-19
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.148e-07   2.327e-08
25- 50  1.322e-06   7.123e-08
50-150  2.351e-06   1.611e-07
15-150  3.987e-06   1.831e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 1.45813       (-0.0552669     0.0552665)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.61 using 59 PHA bins.
# Reduced chi-squared =         0.9931 for     57 degrees of freedom 
# Null hypothesis probability =   4.896960e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.925e-07   3.032e-08
25- 50  1.332e-06   5.912e-08
50-150  2.922e-06   1.240e-07
15-150  4.946e-06   2.269e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.34971        (-0.813471      0.928096)
R1^2/D10^2  : 0.517798        (-0.200573      0.356385)
kT2 [keV]   : 25.1358        (-2.5984      3.53271)
R2^2/D10^2  : 5.35696E-03    (-0.00201541   0.00263496)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.36 using 59 PHA bins.
# Reduced chi-squared =          1.007 for     55 degrees of freedom 
# Null hypothesis probability =   4.610058e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  6.831e-07   9.287e-08
25- 50  1.279e-06   1.176e-07
50-150  3.051e-06   3.099e-07
15-150  5.013e-06   4.424e-07

Peak spectrum fit

Power-law model

Time interval is from    1.060 sec. to    2.060 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23367     ( -0.120659   0.119777 )
Norm@50keV  : 3.82497E-02    ( -0.00258645   0.00258622 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.73 using 59 PHA bins.
# Reduced chi-squared =          1.171 for     57 degrees of freedom 
# Null hypothesis probability =   1.772949e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.51216 ( -0.314061  0.314471 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.8447e-07 ( -2.90345e-08  2.91856e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    1.060 sec. to    2.060 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.17555     ( -0.474653   0.167673 )
Epeak [keV] : 753.292      ( -753.498 -753.498 )
Norm@50keV  : 4.08104E-02    ( -0.00480844   0.0274934 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.68 using 59 PHA bins.
# Reduced chi-squared =          1.191 for     56 degrees of freedom 
# Null hypothesis probability =   1.554199e-01
 
Photon flux (15-150 keV)    in 1 sec: 4.50085 ( -0.32449  0.32039 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.83156e-07 ( -3.1562e-08  3.0252e-08 ) ergs/cm2

Band function

Time interval is from    1.060 sec. to    2.060 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.628166   ( 0.0273127   0.0273127 )
beta        : -1.36887    ( -0.23883   0.177738 )
Epeak [keV] : 46.9674      ( -46.9355 149.933 )
Norm@50keV   : 0.578732    ( -0.592365   375.422 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          64.22 using 59 PHA bins.
# Reduced chi-squared =          1.168 for     55 degrees of freedom 
# Null hypothesis probability =   1.848186e-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]    : 17.3568  (  )
R^2/D10^2   : 0.323823  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         116.86 using 59 PHA bins.
# Reduced chi-squared =         2.0503 for     57 degrees of freedom 
# Null hypothesis probability =   5.159606e-06
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.975e-08   2.670e-09
25- 50  8.884e-08   8.360e-09
50-150  1.923e-07   2.550e-08
15-150  3.009e-07   2.620e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 18.6613       (-1.28275     1.28263)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          86.02 using 59 PHA bins.
# Reduced chi-squared =          1.509 for     57 degrees of freedom 
# Null hypothesis probability =   7.789582e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.646e-08   3.565e-09
25- 50  8.937e-08   8.185e-09
50-150  1.960e-07   4.925e-08
15-150  3.318e-07   7.115e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 9.73692        (-1.62786      1.80241)
R1^2/D10^2  : 1.60104        (-0.631115      1.16182)
kT2 [keV]   : 49.4725        (-15.7862      63.9743)
R2^2/D10^2  : 9.74419E-03    (-0.00761684   0.0198181)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.95 using 59 PHA bins.
# Reduced chi-squared =          1.108 for     55 degrees of freedom 
# Null hypothesis probability =   2.705940e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.324e-08   7.455e-09
25- 50  9.220e-08   2.013e-08
50-150  2.643e-07   1.167e-07
15-150  3.897e-07   1.344e-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: 1.39270     ( -0.0914704   0.0912804 )
Norm@50keV  : 4.10135E-03    ( -0.000205339   0.000205245 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.68 using 59 PHA bins.
# Reduced chi-squared =         0.8892 for     57 degrees of freedom 
# Null hypothesis probability =   7.094889e-01
 
Photon flux (15-150 keV)    in 78.87 sec: 0.498646 ( -0.0262506  0.0263081 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.13031e-06 ( -1.71031e-07  1.71665e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23836     ( -0.358933   0.199428 )
Epeak [keV] : 264.205      ( -264.179 -264.179 )
Norm@50keV  : 4.85502E-03    ( -0.000918914   0.00224512 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.07 using 59 PHA bins.
# Reduced chi-squared =         0.8942 for     56 degrees of freedom 
# Null hypothesis probability =   6.975617e-01
 
Photon flux (15-150 keV)    in 78.87 sec: 0.494270 ( -0.027836  0.013934 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.0994e-06 ( -1.86157e-07  1.79035e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -1.24819   ( 0.924391   0.924391 )
beta        : -3.76761    ( 9.28848   19.2251 )
Epeak [keV] : 282.086      ( -124.519 -282.035 )
Norm@50keV   : 4.79687E-03    ( -0.00151446   0.00125261 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.08 using 59 PHA bins.
# Reduced chi-squared =         0.9105 for     55 degrees of freedom 
# Null hypothesis probability =   6.627158e-01
 
Photon flux (15-150 keV)    in 78.87 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)  = 1.29e-06
S(50-100 keV) = 1.78e-06

T90 vs. Hardness ratio plot

T90                                   = 124.67199999094 sec.
Hardness ratio (energy fluence ratio) = 1.37984

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.28647
Count Ratio (50-100 keV) / (15-25 keV) = 1.06798

Mask shadow pattern

IMX = -2.671879836225824E-01, IMY = -5.909513842115559E-01

TIME vs. PHA plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

TIME vs. DetID plot around the trigger time

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

100 us light curve (15-350 keV)

Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 0.512000

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:
-244.315400 -69.384000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6208  22.0128    0.6  43.0  -52.2   6.9691  20.0    0.7	Crab                          
 40.1639  60.5879    2.4  17.4   49.1   0.6344   4.9 ------	UNKNOWN

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

Time interval of the image:
-69.384000 9.484600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.8243  21.9672    3.8  43.1  -52.5   0.7361   3.0   11.0	Crab                          
320.5673  77.0720    0.4  33.0  114.3   5.0622  27.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
61.684600 303.035300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
308.1241  40.8971    4.0  36.6   79.7   1.1629   2.9    3.4	Cyg X-3                       
326.0056  38.2270    7.0  38.9   57.0   0.6495   1.6    9.7	Cyg X-2                       
  1.6679  35.7724    2.7  45.0   14.9   1.2688   4.3 ------	UNKNOWN                       
320.6142  77.0663    1.6   0.0   96.3   1.0312   7.4 ------	UNKNOWN                       
 36.5615  48.9031    2.5  39.6  -27.4   0.9536   4.6 ------	UNKNOWN                       
187.5988  44.2187    2.6  55.2 -155.9   2.3176   4.5 ------	UNKNOWN

Plot creation:
Sun May 31 16:36:26 EDT 2015