batgrbproduct analysis for trigger=231362

batgrbproduct Analysis for Trigger=231362

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 13:09:13 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger231362
======================================================================

  Trigger: 00231362      Segment: 000

  BAT Trigger Time: 181058856.768   [s; MET]
      Trigger Stop: 181058857.024   [s; MET]
               UTC: 2006-09-27T14:07:35.297340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 329.55252602015   Dec: 5.35273339381842  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.06
     Image Trigger?:     NO
     Rate S/N Ratio:     32.1403173599764  [ if not an image trigger ]
     Image S/N Ratio:    12.06

  Flight Position:   [ source = BAT ]
    RA: 329.55252602015   Dec: 5.35273339381842  [deg; J2000]

  Ground Position:   [ source = BAT pre-slew burst ]
    RA: 329.550783526144   Dec: 5.36836317898992  [deg; J2000]  
        { 21h 58m 12.2s , +05d 22' 06.1" }
         +/- 0.819646589645426 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.188250911544374 [arcmin] (formal 1-sigma fit error)
    SNR: 40.4118655725539
 
  Angular difference between Flight and Ground position is 0.943546 arcmin
 
  Partial Coding Fraction: 0.8203125    [ including projection effects ]

  Duration
     T90: 22.4160000085831 +/- 1.19091395444634
        Measured from: -0.0800000131130219
                   to: 22.33599999547     [s; relative to TRIGTIME]
     T50: 15.7599999904633 +/- 5.19767638389395
        Measured from: 1.07600000500679
                   to: 16.83599999547     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.215999990701675     
                   to: 1.21599999070168     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.992000013589859     
                   to: 23.7520000040531     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.565441   0.832084   0.526809   0.077255
           0.026364   0.027983   0.024841   0.020986 [error]
 Peak      0.064426   0.131529   0.124873   0.035873
           0.005995   0.007091   0.006874   0.005084 [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 1.83e-07 3.14e-07 4.12e-07 1.09e-06 1.21e-06 2.00e-06   erg/cm2
              Error 1.32e-08 1.39e-08 2.43e-08 1.37e-07 5.80e-08 1.57e-07   erg/cm2
Peak flux Power-law 6.15e-01 8.28e-01 8.20e-01 1.46e+00 2.74e+00 3.73e+00   ph/cm2/s
              Error 6.96e-02 5.82e-02 5.26e-02 1.96e-01 1.63e-01 2.41e-01   ph/cm2/s
 
Fluence   Cutoff-PL 1.61e-07 3.40e-07 4.19e-07 3.61e-07 1.12e-06 1.28e-06   erg/cm2
              Error 1.57e-08 1.78e-08 2.72e-08 1.58e-07 6.77e-08 1.70e-07   erg/cm2
Peak flux Cutoff-PL 5.21e-01 8.73e-01 8.91e-01 7.34e-01 2.68e+00 3.02e+00   ph/cm2/s
              Error 8.40e-02 6.72e-02 6.62e-02 2.70e-01 1.66e-01 3.08e-01   ph/cm2/s
 
Fluence        Band 1.48e-07 3.54e-07 3.95e-07 7.52e-07 1.14e-06 1.65e-06   erg/cm2
              Error 1.80e-08 2.01e-08 2.66e-08 1.69e-07 6.28e-08 1.85e-07   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    1.610    0.076    -      -           5.22e-03 2.33e-04   74.230 57
CPL   0.808    0.362      70.7   14.5      1.36e-02 6.12e-03   57.000 56
 
 
=== 1-s peak spectral analysis ===
 
Model Ph_index Ph_90err Epeak  Epeak_90err Norm     Nomr_90err chi2   dof
PL    1.013    0.096    -      -           2.38e-02 1.39e-03   69.190 57
CPL   0.286    0.428     130.2   60.6      5.18e-02 2.41e-02   59.150 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: 22.976000 sec.
T50 in the 50-300 keV band: 5.760000 sec.

 
=== Table of the duration information ==
 
        Value   tstart    tstop
T100   24.744   -0.992   23.752
T90    22.416   -0.080   22.336
T50    15.760    1.076   16.836
Peak    1.000    0.216    1.216

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
  329.5508     5.3684   0.0048    16.5992   -97.6503         1.4821745     40.412 TRIG_00231362                 
 
Foreground time interval of the image:
 -0.992   9.533 (delta_t =  10.525 [sec])
Background time interval of the image:
-239.768  -0.992 (delta_t = 238.776 [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   -0.992 sec. to   23.752 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.61032     ( -0.0759302   0.0764688 )
Norm@50keV  : 5.22115E-03    ( -0.000233266   0.000232534 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          74.23 using 59 PHA bins.
# Reduced chi-squared =          1.302 for     57 degrees of freedom 
# Null hypothesis probability =   6.231334e-02
 
Photon flux (15-150 keV)    in 24.74 sec: 0.673104 ( -0.0294893  0.0295239 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.20654e-06 ( -5.77996e-08  5.81091e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.992 sec. to   23.752 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.808265     ( -0.377517   0.346803 )
Epeak [keV] : 70.6724      ( -9.57181 19.3855 )
Norm@50keV  : 1.36284E-02    ( -0.00455542   0.00768343 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.00 using 59 PHA bins.
# Reduced chi-squared =          1.018 for     56 degrees of freedom 
# Null hypothesis probability =   4.377227e-01
 
Photon flux (15-150 keV)    in 24.74 sec: 0.644591 ( -0.031641  0.031673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12065e-06 ( -6.74264e-08  6.80177e-08 ) ergs/cm2

Band function

Time interval is from   -0.992 sec. to   23.752 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.325714   ( -0.875779   2.33952 )
beta        : -1.95514    ( -0.233936   0.171861 )
Epeak [keV] : 45.2258      ( -10.173 13.6808 )
Norm@50keV   : 7.31808E-02    ( -0.0838679   2.8377 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.09 using 59 PHA bins.
# Reduced chi-squared =         0.9289 for     55 degrees of freedom 
# Null hypothesis probability =   6.248494e-01
 
Photon flux (15-150 keV)    in 24.74 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.13893e-06 ( -1.13875e-06  -6.26738e-08 ) ergs/cm2

Single BB

 
Spectral model blackbody:
------------------------------------------------------------
Parameters  : value    Lower 90%  Upper 90%
kT [keV]    : 13.3189  (  )
R^2/D10^2   : 0.113415  (   )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =         124.82 using 59 PHA bins.
# Reduced chi-squared =         2.1899 for     57 degrees of freedom 
# Null hypothesis probability =   5.620352e-07
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.055e-07   8.461e-09
25- 50  3.729e-07   1.806e-08
50-150  4.240e-07   3.983e-08
15-150  9.024e-07   4.503e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 157.424       (-31.1703      -157.284)
Norm        : 2.75165       (-0.135357     0.149345)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.85 using 59 PHA bins.
# Reduced chi-squared =          1.085 for     57 degrees of freedom 
# Null hypothesis probability =   3.071007e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.741e-07   1.199e-08
25- 50  3.249e-07   3.130e-08
50-150  6.541e-07   2.031e-07
15-150  1.153e-06   2.363e-07

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 8.54850        (-1.18529      1.19538)
R1^2/D10^2  : 0.381921        (-0.117727      0.201319)
kT2 [keV]   : 27.4005        (-5.48166      10.5935)
R2^2/D10^2  : 5.55153E-03    (-0.00377656   0.00780569)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.50 using 59 PHA bins.
# Reduced chi-squared =         0.9364 for     55 degrees of freedom 
# Null hypothesis probability =   6.089840e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.476e-07   2.202e-08
25- 50  3.566e-07   4.701e-08
50-150  6.348e-07   2.498e-07
15-150  1.139e-06   2.968e-07

Peak spectrum fit

Power-law model

Time interval is from    0.216 sec. to    1.216 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.01308     ( -0.0967712   0.0954837 )
Norm@50keV  : 2.37716E-02    ( -0.00139246   0.00139166 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          69.19 using 59 PHA bins.
# Reduced chi-squared =          1.214 for     57 degrees of freedom 
# Null hypothesis probability =   1.290708e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.73872 ( -0.16253  0.162758 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.55841e-07 ( -1.6453e-08  1.64838e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.216 sec. to    1.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.285971     ( -0.448947   0.406067 )
Epeak [keV] : 130.199      ( -30.0691 91.1615 )
Norm@50keV  : 5.18132E-02    ( -0.017871   0.0304036 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.15 using 59 PHA bins.
# Reduced chi-squared =          1.056 for     56 degrees of freedom 
# Null hypothesis probability =   3.611598e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.67944 ( -0.1663  0.16624 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.46613e-07 ( -1.7728e-08  1.7625e-08 ) ergs/cm2

Band function

Time interval is from    0.216 sec. to    1.216 sec.
 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 0.707813   ( -1.18717   -0.720685 )
beta        : -1.31063    ( 1.31077   0.198396 )
Epeak [keV] : 65.6526      ( -27.8925 89.9063 )
Norm@50keV   : 0.213150    ( -0.227816   110.487 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.98 using 59 PHA bins.
# Reduced chi-squared =          1.036 for     55 degrees of freedom 
# Null hypothesis probability =   4.011463e-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]    : 20.5883  (-1.49753  1.66314)
R^2/D10^2   : 0.123499  (-0.0271912   0.033937)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          88.45 using 59 PHA bins.
# Reduced chi-squared =          1.552 for     57 degrees of freedom 
# Null hypothesis probability =   4.790042e-03
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  9.973e-09   1.093e-09
25- 50  5.062e-08   4.050e-09
50-150  1.596e-07   1.625e-08
15-150  2.202e-07   1.665e-08

Thermal bremsstrahlung (OTTB)

 
 
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT [keV]    : 199.363       (      )
Norm        : 10.9377       (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =         144.77 using 59 PHA bins.
# Reduced chi-squared =         2.5398 for     57 degrees of freedom 
# Null hypothesis probability =   1.405288e-09
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  2.724e-08   1.940e-09
25- 50  5.239e-08   3.640e-09
50-150  1.149e-07   2.756e-08
15-150  1.945e-07   2.940e-08

Double BB

 
 
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters  : value         Lower 90%    Upper 90%
kT1 [keV]   : 10.3326        (-2.46764      2.92922)
R1^2/D10^2  : 0.574514        (-0.253457      0.573604)
kT2 [keV]   : 34.5647        (-7.53952      20.7404)
R2^2/D10^2  : 1.84764E-02    (-0.0140846   0.0252759)
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.18 using 59 PHA bins.
# Reduced chi-squared =          1.022 for     55 degrees of freedom 
# Null hypothesis probability =   4.302737e-01
 
Energy  Fluence     90% Error
[keV]   [erg/cm2]   [erg/cm2]
15- 25  1.577e-08   4.581e-09
25- 50  5.336e-08   1.435e-08
50-150  1.805e-07   7.728e-08
15-150  2.496e-07   9.175e-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: 1.54532     ( -0.0738596   0.0742413 )
Norm@50keV  : 8.83073E-03    ( -0.000380673   0.000379844 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.74 using 59 PHA bins.
# Reduced chi-squared =          1.399 for     57 degrees of freedom 
# Null hypothesis probability =   2.506615e-02
 
Photon flux (15-150 keV)    in 10.52 sec: 1.11641 ( -0.0480831  0.0481377 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.75155e-07 ( -4.08993e-08  4.1089e-08 ) ergs/cm2

Cutoff power-law model

Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.871486     ( -0.339546   0.315473 )
Epeak [keV] : 82.3501      ( -13.142 30.1661 )
Norm@50keV  : 1.94119E-02    ( -0.00587058   0.00925383 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.36 using 59 PHA bins.
# Reduced chi-squared =          1.167 for     56 degrees of freedom 
# Null hypothesis probability =   1.835194e-01
 
Photon flux (15-150 keV)    in 10.52 sec: 1.07749 ( -0.05102  0.05106 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.27222e-07 ( -4.64626e-08  4.66152e-08 ) ergs/cm2

Band function

 
Spectral model in the Band function:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
alpha       : 1.10660   ( -1.01264   2.89407 )
beta        : -1.79040    ( -0.170607   0.138481 )
Epeak [keV] : 39.6174      ( -10.2233 16.9597 )
Norm@50keV   : 0.408789    ( -0.400792   13.3945 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.04 using 59 PHA bins.
# Reduced chi-squared =          1.110 for     55 degrees of freedom 
# Null hypothesis probability =   2.680609e-01
 
Photon flux (15-150 keV)    in 10.52 sec: 1.06693 ( 5.93307  -0.05183 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.38077e-07 ( -8.38003e-07  -4.33771e-08 ) ergs/cm2

S(25-50 keV) vs. S(50-100 keV) plot

S(25-50 keV)  = 3.14e-07
S(50-100 keV) = 4.12e-07

T90 vs. Hardness ratio plot

T90                                   = 22.4160000085831 sec.
Hardness ratio (energy fluence ratio) = 1.3121

Color vs. Color plot

Count Ratio  (25-50 keV) / (15-25 keV) = 1.47157
Count Ratio (50-100 keV) / (15-25 keV) = 0.931678

Mask shadow pattern

IMX = -3.968452576536684E-02, IMY = 2.954447692596853E-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:
-239.768000 -0.992000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1422  38.3288    6.3  38.9  -38.5   0.4746   1.8    1.4	Cyg X-2                       
  8.3618 -42.0634    2.6  50.2  145.4   3.7509   4.5 ------	UNKNOWN

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

Time interval of the image:
-0.992000 9.532590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
325.9896  38.2823    7.5  38.9  -38.7  -0.0839  -1.5    8.9	Cyg X-2                       
329.5508   5.3684    0.3  16.6  -97.7   1.4822  40.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
48.932600 396.232640
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
288.7587  11.0074    5.3  40.8  -84.1   2.2782   2.2    4.4	GRS 1915+105                  
299.5841  35.2092    0.4  40.7  -43.5  12.8954  31.2    0.5	Cyg X-1                       
308.1027  40.8073   14.7  40.3  -30.1  -0.2804  -0.8    8.7	Cyg X-3                       
326.0982  38.3252    5.0  33.1   -9.7   0.5575   2.3    3.5	Cyg X-2                       
 10.6331  38.9513    2.6  50.0   37.1   4.5022   4.4 ------	UNKNOWN                       
  1.6608 -25.1968    2.7  43.7  131.1   3.3321   4.4 ------	UNKNOWN                       
308.0902  37.6436    1.1  37.8  -33.0   3.1514  10.3 ------	UNKNOWN                       
288.4237  -8.3772    2.6  43.3 -113.0   4.1064   4.4 ------	UNKNOWN

Plot creation:
Sun May 31 11:53:30 EDT 2015