batgrbproduct analysis for trigger=285654

batgrbproduct Analysis for Trigger=285654

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): Mon Jan 20 08:24:06 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger285654
======================================================================

  Trigger: 00285654      Segment: 000

  BAT Trigger Time: 206706828.416   [s; MET]
      Trigger Stop: 206706830.464   [s; MET]
               UTC: 2007-07-21T10:33:46.314280    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 33.1314958399504   Dec: -2.18419461651638  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.36
     Image Trigger?:     NO
     Rate S/N Ratio:     12  [ if not an image trigger ]
     Image S/N Ratio:    8.36

  Flight Position:   [ source = BAT ]
    RA: 33.1314958399504   Dec: -2.18419461651638  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 33.1327948317786   Dec: -2.20076006275162  [deg; J2000]  
        { 02h 12m 31.9s , -02d 12' 02.7" }
         +/- 1.15178840729537 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.3884581262084 [arcmin] (formal 1-sigma fit error)
    SNR: 24.856678201223
 
  Angular difference between Flight and Ground position is 0.996973 arcmin
 
  Partial Coding Fraction: 0.2382812    [ including projection effects ]

  Duration
     T90: 336.863999992609 +/- 22.468004362484
        Measured from: -4.10400000214577
                   to: 332.759999990463     [s; relative to TRIGTIME]
     T50: 269.816000014544 +/- 33.769498957601
        Measured from: 2.62399998307228
                   to: 272.439999997616     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.11599999666214     
                   to: 0.88400000333786     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.71200001239777     
                   to: 359.919999986887     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.182884   1.675353   1.783700   0.551731
           0.098022   0.103312   0.092489   0.079478 [error]
 Peak      0.020902   0.064539   0.077808   0.035627
           0.009492   0.010631   0.010218   0.008613 [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 3.54e-07 7.65e-07 1.30e-06 5.06e-06 3.56e-06 7.48e-06   erg/cm2
              Error 4.17e-08 5.28e-08 8.93e-08 8.01e-07 2.26e-07 8.48e-07   erg/cm2
Peak flux Power-law 2.98e-01 4.46e-01 5.00e-01 1.06e+00 1.56e+00 2.31e+00   ph/cm2/s
              Error 1.06e-01 9.87e-02 7.80e-02 3.60e-01 2.58e-01 3.90e-01   ph/cm2/s
 
Fluence   Cutoff-PL 3.54e-07 7.66e-07 1.30e-06 5.01e-06 3.56e-06 7.43e-06   erg/cm2
              Error 4.24e-08 5.50e-08 7.04e-08 1.46e-06 2.28e-07 1.30e-06   erg/cm2
Peak flux Cutoff-PL 2.63e-01 4.54e-01 5.29e-01 7.17e-01 1.54e+00 1.96e+00   ph/cm2/s
              Error 1.29e-01 1.05e-01 1.03e-01 3.93e-01 2.62e-01 6.02e-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    1.237    0.106    -      -           9.68e-04 5.66e-05   58.340 57
CPL   1.233    0.251    9999.1    0.0      9.72e-04 2.72e-04   58.340 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    0.835    0.276    -      -           1.36e-02 2.29e-03   49.380 57
CPL   0.407    0.957     224.3    0.0      2.07e-02 3.11e-02   48.920 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: 353.024000 sec.
T50 in the 50-300 keV band: 281.664000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100  366.632   -6.712  359.920
T90   336.864   -4.104  332.760
T50   269.816    2.624  272.440
Peak    1.000   -0.116    0.884

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
   33.1328    -2.2008   0.0078    38.8781  -120.2421         2.9596954     24.857 TRIG_00285654                 
 
Foreground time interval of the image:
 -6.712  24.285 (delta_t =  30.997 [sec])
Background time interval of the image:
-239.416  -6.712 (delta_t = 232.704 [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)

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   -6.712 sec. to  359.920 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23734     ( -0.106818   0.105699 )
Norm@50keV  : 9.67930E-04    ( -5.65631e-05   5.65397e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.34 using 59 PHA bins.
# Reduced chi-squared =          1.024 for     57 degrees of freedom 
# Null hypothesis probability =   4.258726e-01
 
Photon flux (15-150 keV)    in 366.6 sec: 0.114249 ( -0.0070398  0.00706137 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.56321e-06 ( -2.25682e-07  2.2676e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -6.712 sec. to  359.920 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.23309     ( -0.35962   0.142391 )
Epeak [keV] : 9999.10      (   )
Norm@50keV  : 9.72367E-04    ( -5.67104e-05   0.000487918 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.34 using 59 PHA bins.
# Reduced chi-squared =          1.042 for     56 degrees of freedom 
# Null hypothesis probability =   3.893263e-01
 
Photon flux (15-150 keV)    in 366.6 sec: 0.114242 ( -0.007322  0.00702 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.56332e-06 ( -2.31035e-07  2.25752e-07 ) ergs/cm2

Band function

Time interval is from   -6.712 sec. to  359.920 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.97268   ( -4.97268   -4.97268 )
beta        : -1.25378    ( -0.110892   0.110661 )
Epeak [keV] : 21.9446      ( -21.9446 5.43844 )
Norm@50keV   : 167.941    ( -9.79171   273435 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.99 using 59 PHA bins.
# Reduced chi-squared =          1.054 for     55 degrees of freedom 
# Null hypothesis probability =   3.657756e-01
 
Photon flux (15-150 keV)    in 366.6 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]    : 19.5514  (  )
R^2/D10^2   : 5.49677E-03  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         124.66 using 59 PHA bins.
# Reduced chi-squared =         2.1870 for     57 degrees of freedom 
# Null hypothesis probability =   5.883472e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.498e-07   1.802e-08
25- 50  7.350e-07   6.984e-08
50-150  2.076e-06   2.104e-07
15-150  2.960e-06   1.969e-07

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 0.479193       (-0.0284512     0.028445)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          85.70 using 59 PHA bins.
# Reduced chi-squared =          1.504 for     57 degrees of freedom 
# Null hypothesis probability =   8.290617e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.376e-07   3.134e-08
25- 50  8.417e-07   6.031e-08
50-150  1.846e-06   3.551e-07
15-150  3.125e-06   4.703e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 6.57554        (-1.40265      1.93899)
R1^2/D10^2  : 0.123981        (-0.0715931      0.180214)
kT2 [keV]   : 29.3170        (-4.45122      8.12015)
R2^2/D10^2  : 1.27890E-03    (-0.000702013   0.000955702)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.98 using 59 PHA bins.
# Reduced chi-squared =          1.109 for     55 degrees of freedom 
# Null hypothesis probability =   2.697157e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  3.584e-07   1.219e-07
25- 50  7.468e-07   1.377e-07
50-150  2.439e-06   4.766e-07
15-150  3.544e-06   6.067e-07

Peak spectrum fit

Power-law model

Time interval is from   -0.116 sec. to    0.884 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.834882     ( -0.286649   0.264747 )
Norm@50keV  : 1.36194E-02    ( -0.00231336   0.00226004 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.38 using 59 PHA bins.
# Reduced chi-squared =         0.8663 for     57 degrees of freedom 
# Null hypothesis probability =   7.532957e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.56382 ( -0.257461  0.259374 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.56868e-07 ( -2.49621e-08  2.50408e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.116 sec. to    0.884 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.406733     ( -1.35732   0.556934 )
Epeak [keV] : 224.279      ( -224.325 -224.325 )
Norm@50keV  : 2.07332E-02    ( -0.0090244   0.0531659 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.92 using 59 PHA bins.
# Reduced chi-squared =         0.8736 for     56 degrees of freedom 
# Null hypothesis probability =   7.375100e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.54360 ( -0.26105  0.26372 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.54935e-07 ( -2.6482e-08  2.5793e-08 ) ergs/cm2

Band function

Time interval is from   -0.116 sec. to    0.884 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : -0.784907   ( 0.785053   0.785053 )
beta        : -0.834866    ( -0.26475   0.286564 )
Epeak [keV] : 14.2077      ( -14.205 -14.205 )
Norm@50keV   : 2.07301E-02    ( -0.0092803   0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.38 using 59 PHA bins.
# Reduced chi-squared =         0.8978 for     55 degrees of freedom 
# Null hypothesis probability =   6.882825e-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]    : 24.4177  (-4.75541  6.97393)
R^2/D10^2   : 4.25925E-02  (-0.022781   0.0416572)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.39 using 59 PHA bins.
# Reduced chi-squared =         0.9367 for     57 degrees of freedom 
# Null hypothesis probability =   6.112476e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  4.466e-09   1.485e-09
25- 50  2.503e-08   7.450e-09
50-150  1.110e-07   2.778e-08
15-150  1.405e-07   3.277e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 200.000       (      )
Norm        : 6.44898       (-1.08407     1.08398)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.73 using 59 PHA bins.
# Reduced chi-squared =          1.206 for     57 degrees of freedom 
# Null hypothesis probability =   1.371876e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.605e-08   9.070e-09
25- 50  3.087e-08   1.763e-08
50-150  6.771e-08   3.827e-08
15-150  1.146e-07   6.510e-08

Double BB

------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 15.1968        (-5.68694      6.74589)
R1^2/D10^2  : 0.137570        (-0.0953863      0.331452)
kT2 [keV]   : 199.634        (      )
R2^2/D10^2  : 2.72097E-04    (-0.000147768   0.0148752)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.88 using 59 PHA bins.
#Fit statistic : Chi-Squared =          46.63 using 59 PHA bins.
# Reduced chi-squared =         0.8524 for     55 degrees of freedom 
# Reduced chi-squared =         0.8478 for     55 degrees of freedom 
# Null hypothesis probability =   7.737352e-01
# Null hypothesis probability =   7.817145e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  7.164e-09   4.318e-09
25- 50  2.927e-08   1.686e-08
50-150  1.132e-07   5.825e-08
15-150  1.497e-07   7.525e-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: 1.21725     ( -0.104614   0.103338 )
Norm@50keV  : 6.34632E-03    ( -0.000377457   0.000377132 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.05 using 59 PHA bins.
# Reduced chi-squared =          1.071 for     57 degrees of freedom 
# Null hypothesis probability =   3.326548e-01
 
Photon flux (15-150 keV)    in 31 sec: 0.746786 ( -0.0467748  0.0468762 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.98641e-06 ( -1.26267e-07  1.26532e-07 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.00012     ( -0.425046   0.266459 )
Epeak [keV] : 255.639      ( -255.639 -255.639 )
Norm@50keV  : 7.99964E-03    ( -0.00192827   0.00438582 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.15 using 59 PHA bins.
# Reduced chi-squared =          1.074 for     56 degrees of freedom 
# Null hypothesis probability =   3.278150e-01
 
Photon flux (15-150 keV)    in 31 sec: 0.739759 ( -0.048414  0.048448 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.96559e-06 ( -1.33774e-07  1.32829e-07 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 4.90861   ( -5.3034   -4.90861 )
beta        : -1.27747    ( -0.13035   0.115635 )
Epeak [keV] : 26.4831      ( -6.60483 4.96073 )
Norm@50keV   : 317.997    ( -18.7935   13361.4 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.33 using 59 PHA bins.
# Reduced chi-squared =          1.061 for     55 degrees of freedom 
# Null hypothesis probability =   3.539692e-01
 
Photon flux (15-150 keV)    in 31 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)  = 7.65e-07
S(50-100 keV) = 1.30e-06

T90 vs. Hardness ratio plot

T90                                   = 336.863999992609 sec.
Hardness ratio (energy fluence ratio) = 1.69935

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.41633
Count Ratio (50-100 keV) / (15-25 keV) = 1.50792

Mask shadow pattern

IMX = -4.060807856896126E-01, IMY = 6.965387067634754E-01

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:
-239.416000 -6.712000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
344.4211 -19.5449    2.9  19.3  120.8   0.6570   4.0 ------	UNKNOWN                       
357.0281 -75.9437    2.5  47.5    9.1   1.4962   4.6 ------	UNKNOWN                       
352.9335 -23.6021    2.6  10.4  123.2   0.6148   4.3 ------	UNKNOWN                       
352.7199   5.8696    2.7  35.9  169.1   0.8903   4.4  560.5	UNKNOWN                       
  3.9048 -65.0427    2.6  36.5    6.5   0.8807   4.5 ------	UNKNOWN                       
 47.5585 -78.8454    2.6  53.8   -2.6   1.9685   4.4 ------	UNKNOWN                       
 73.4583 -78.7466    2.3  58.2   -5.4   4.2847   5.0 ------	UNKNOWN                       
  2.5264  28.7748    2.3  57.3 -173.6   3.7767   5.1 ------	UNKNOWN                       
 18.9627   2.2249    2.8  34.3 -144.1   0.7434   4.1 ------	UNKNOWN                       
 49.1642 -24.1705    2.8  41.2  -78.0   2.6400   4.1 ------	UNKNOWN

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

Time interval of the image:
-6.712000 24.284600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 20.9668 -21.2777    2.8  17.7 -103.3   0.2264   4.1 ------	UNKNOWN                       
 25.8489 -23.2063    2.2  21.1  -92.5   0.3180   5.3 ------	UNKNOWN                       
 33.1328  -2.2008    0.5  38.9 -120.2   2.9599  24.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
81.484670 542.608200
660.584000 722.646500
840.584000 902.630800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 33.1283  -2.1793    1.3   0.0  153.2   2.1768   9.1 ------	UNKNOWN                       
 72.5325 -41.0919    2.8  52.6  -16.4   2.6830   4.1 ------	UNKNOWN

Plot creation:
Sun May 31 09:41:08 EDT 2015