GRB060923B

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: Wed Jan 22 13:23:17 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger230702
======================================================================

  Trigger: 00230702      Segment: 000

  BAT Trigger Time: 180704287.68   [s; MET]
      Trigger Stop: 180704291.776   [s; MET]
               UTC: 2006-09-23T11:38:06.217800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 238.201486511859   Dec: -30.9072142492461  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.4
     Image Trigger?:     NO
     Rate S/N Ratio:     10.3923048454133  [ if not an image trigger ]
     Image S/N Ratio:    9.4

  Analysis Position:   [ source = BAT ]
    RA: 238.201486511859   Dec: -30.9072142492461  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 238.187882282817   Dec: -30.9054737709443  [deg; J2000]  
        { 15h 52m 45.1s , -30d 54' 19.7" }
         +/- 1.6711126016364 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.76876867175969 [arcmin] (formal 1-sigma fit error)
    SNR: 14.6062519696874
 
  Angular difference between the analysis and refined position is 0.708095 arcmin
 
  Partial Coding Fraction: 0.3632812    [ including projection effects ]

  Duration
     T90: 8.94800001382828 +/- 1.29634099081825
        Measured from: 0.331999987363815
                   to: 9.28000000119209     [s; relative to TRIGTIME]
     T50: 4.30400002002716 +/- 1.05255496990518
        Measured from: 2.43599998950958
                   to: 6.74000000953674     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.92800000309944     
                   to: 5.92800000309944     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0680000185966492     
                   to: 9.88799998164177     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.391487   0.368509   0.110670   0.029042
           0.036084   0.033707   0.029116   0.028135 [error]
 Peak      0.062140   0.059262   0.018138   0.005878
           0.011742   0.010860   0.009368   0.008608 [error]

     [ fluence units of on-axis counts / fully illuminated detector ] 

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    9.956   -0.068    9.888
T90     8.948    0.332    9.280
T50     4.304    2.436    6.740
Peak    1.000    4.928    5.928
 
 
====== Spectral Analysis Summary =====================================
 
Model      : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index   : photon index: E^{Ph_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 both the PL model and CPL model
Nomr_90err : 90% error of the normalization
chi2       : Chi-Squared
dof        : degree of freedo
 
=== Time-averaged spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -2.474    -0.247      0.228       -           -               -         4.96e-03     -8.37e-04          8.22e-04      58.540   57
CPL     -1.814    -0.188      1.302       10.459      N/A           N/A         1.26e-02        N/A               N/A         57.280   56
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
 
Model Ph_index Ph_90err_low Ph_90err_hi  Epeak  Epeak_90err_low  Epeak_90err_hi  Norm       Nomr_90err_low    Norm_90err_hi    chi2    dof
PL      -2.436     -0.462     0.401       -           -               -         7.51e-03     -2.45e-03          2.43e-03      59.260   57
CPL      0.017     -2.032    -0.017       26.890      N/A           N/A         3.18e-01        N/A               N/A         55.860   56
 
 
=== 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         PL   1.59e-07  1.62e-07  1.17e-07  1.35e-07  4.90e-07  5.72e-07   erg/cm2
      90%_error_low -2.30e-08 -1.90e-08 -2.62e-08 -5.05e-08 -6.17e-08 -8.96e-08   erg/cm2
      90%_error_hi   2.35e-08  1.88e-08  2.77e-08  6.83e-08  6.32e-08  1.01e-07   erg/cm2
Peak flux       PL   7.66e-01  4.46e-01  1.65e-01  8.06e-02  1.42e+00  1.46e+00   ph/cm2/s
      90%_error_low -2.13e-01 -1.05e-01 -6.56e-02 -4.69e-02 -3.18e-01 -3.26e-01   ph/cm2/s
      90%_error_hi   2.21e-01  1.04e-01  7.27e-02  7.71e-02  3.18e-01  3.26e-01   ph/cm2/s
 
Fluence        CPL    N/A      N/A      N/A      N/A      N/A      N/A      erg/cm2
      90%_error_low -2.30e-08 -1.90e-08 -2.62e-08 -5.05e-08 -6.17e-08 -8.96e-08   erg/cm2
      90%_error_hi   2.35e-08  1.88e-08  2.77e-08  6.83e-08  6.32e-08  1.01e-07   erg/cm2
Peak flux      CPL   7.03e-01  5.63e-01  6.71e-02  4.90e-04  1.33e+00  1.34e+00   ph/cm2/s
      90%_error_low -2.40e-01 -1.52e-01 -6.71e-02     N/A   -3.26e-01 -3.29e-01   ph/cm2/s
      90%_error_hi   2.44e-01  1.53e-01  1.39e-01     N/A    3.29e-01  3.27e-01   ph/cm2/s
 
======================================================================

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  238.1879   -30.9055   0.0131    46.0736  -156.8753         0.9609352     14.606 TRIG_00230702                 
 
Foreground time interval of the image:
 -0.068   9.888 (delta_t =   9.956 [sec])
Background time interval of the image:
-239.680  -0.068 (delta_t = 239.612 [sec])

Light Curves

Note: The mask-weighted lightcurves have units of either count/det or counts/sec/det, where a det is 0.4 x 0.4 = 0.16 sq cm.

Full-time range; 1 s binning

Bokeh Plot

Other quick-look light curves:

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve

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   -0.068 sec. to    9.888 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.47374     ( -0.246634   0.227504 )
Norm@50keV  : 4.95785E-03    ( -0.000836987   0.000822281 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.54 using 59 PHA bins.
# Reduced chi-squared =          1.027 for     57 degrees of freedom 
# Null hypothesis probability =   4.185311e-01
 
Photon flux (15-150 keV)    in 9.956 sec: 0.958639 ( -0.105124  0.105201 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.90303e-07 ( -6.17498e-08  6.32062e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.068 sec. to    9.888 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.81447     ( -0.187983   1.30195 )
Epeak [keV] : 10.4592      (   )
Norm@50keV  : 1.26316E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.28 using 59 PHA bins.
# Reduced chi-squared =          1.023 for     56 degrees of freedom 
# Null hypothesis probability =   4.275784e-01
 
Photon flux (15-150 keV)    in 9.956 sec: 0.934548 ( -0.111141  0.107842 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    4.928 sec. to    5.928 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.43605     ( -0.461428   0.401835 )
Norm@50keV  : 7.50593E-03    ( -0.00244453   0.00243357 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.26 using 59 PHA bins.
# Reduced chi-squared =          1.040 for     57 degrees of freedom 
# Null hypothesis probability =   3.930457e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.41884 ( -0.31798  0.31819 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.38499e-08 ( -1.8854e-08  1.97187e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    4.928 sec. to    5.928 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.0171221     ( -2.06789   -0.0528611 )
Epeak [keV] : 26.8898      (   )
Norm@50keV  : 0.317531    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.85 using 59 PHA bins.
# Reduced chi-squared =         0.9974 for     56 degrees of freedom 
# Null hypothesis probability =   4.803649e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.33308 ( -0.32638  0.32901 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 8.948 sec.
Hardness ratio (energy fluence ratio) = 0.720128997979

S(15-50 keV) vs. S(50-150 keV) plot

S(15-50 keV)  = 3.209453e-07
S(50-150 keV) = 1.6935626e-07

The dash-dotted line and the dashed line traces the fluences calculated from the Band function with Epeak = 15 and 150 keV, respectively. Both lines assume a canonical values of alpha = -1 and beta = -2.5.

Mask shadow pattern

 IMX = -9.547791601715945E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.680000 -0.068000

# RAcent #  [deg] 244.9831 -15.6404 254.4607  35.3451 256.0200 -37.8621 256.4340 -36.4427 263.0945 -24.7457 268.3932  -1.3044 270.2347 -24.9761 270.3100 -25.8908 274.0133 -14.0253 276.0567 -30.2018 284.9276 -25.0439 288.7050  10.9054 262.9665 -33.8717 231.3413  -8.1506 208.0506  32.7121

Pre-slew

 Time interval of the image: -0.068000 9.888000

# RAcent #  [deg] 245.0958 -15.6468 254.2785  35.4843 255.8604 -37.8064 256.4607 -36.4347 262.9227 -24.6741 268.2215  -1.3156 270.2606 -25.0717 270.3601 -25.7063 274.1039 -14.0453 275.8462 -30.2350 284.9069 -24.8840 288.9293  11.0634 262.9827 -33.6846 286.9731  56.5503 239.3845  61.6710 238.1879 -30.9055 222.6574  49.9861

Post-slew

 Time interval of the image: 101.220590 388.920600

# RAcent #  [deg] 170.2972 -60.6233 187.0181 -62.7662 244.9781 -15.6388 255.9948 -37.8419 256.4786 -36.4127 263.1171 -24.7487 264.6753 -44.3124 268.4950  -1.3423 270.2497 -25.1149 270.1383 -25.8432 273.9866 -13.8997 276.0304 -30.4718 262.9567 -33.8641 156.8627 -59.1634 195.5740 -16.9828 183.7363 -31.8199 218.1162  17.4035

IMY = 4.077347397311630E-01 source in the pre-burst/pre-slew/post-slew images

image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 0.2 29.6 -157.5 12.5364 52.8 0.2 Sco X-1 1.8 23.0 3.1 1.5210 6.5 0.2 Her X-1 1.9 50.3 -178.0 3.2547 6.2 1.9 4U 1700-377 6.4 48.8 -178.5 0.7840 1.8 1.2 GX 349+2 8.3 38.0 170.9 0.4604 1.4 4.7 GX 1+4 11.0 19.3 137.5 0.2497 1.0 9.0 SW J1753.5-0127 5.3 40.3 161.3 0.9306 2.2 6.7 GX 5-1 6.8 41.2 161.8 0.7556 1.7 8.9 GRS 1758-258 27.0 32.6 146.8 0.1486 0.4 0.8 GX 17+2 24.6 47.3 158.0 0.3302 0.5 12.0 H1820-303 59.5 47.7 145.2 0.1719 0.2 9.5 HT1900.1-2455 3.3 33.4 92.3 1.8166 3.4 6.0 GRS 1915+105 3.0 46.9 173.9 1.7874 3.8 2.5 GX 354-0 2.8 30.9 -127.0 1.1591 4.1 ------ UNKNOWN 3.2 47.1 -53.1 3.8613 3.7 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 4.4 29.6 -157.7 -0.1014 -2.6 6.7 Sco X-1 6.0 23.1 2.7 0.0735 1.9 12.2 Her X-1 6.5 50.2 -177.8 0.1463 1.8 6.4 4U 1700-377 30.2 48.8 -178.5 0.0295 0.4 1.4 GX 349+2 7.3 37.9 171.1 -0.0818 -1.6 6.4 GX 1+4 0.0 19.2 137.9 -0.0460 -1.2 12.0 SW J1753.5-0127 5.9 40.4 161.3 -0.1220 -2.0 1.4 GX 5-1 12.4 41.0 161.6 0.0598 0.9 3.8 GRS 1758-258 17.1 32.7 146.7 0.0342 0.7 5.7 GX 17+2 10.4 47.3 158.2 -0.1091 -1.1 8.9 H1820-303 3.7 47.5 145.1 -0.4239 -3.1 7.4 HT1900.1-2455 8.0 33.6 92.0 0.1178 1.5 10.5 GRS 1915+105 11.0 46.7 173.9 0.0775 1.1 9.0 GX 354-0 2.8 50.7 25.8 0.6880 4.1 ------ UNKNOWN 2.2 50.5 -5.9 0.4358 5.2 ------ UNKNOWN 0.8 46.1 -156.9 0.9613 14.6 ------ UNKNOWN 2.5 45.8 -24.9 0.3000 4.7 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 78.3 52.7 -162.9 0.1051 0.1 0.5 Cen X-3 113.3 45.4 -167.6 0.0485 0.1 9.9 GX 301-2 0.2 16.5 6.0 13.2803 55.9 0.1 Sco X-1 0.7 16.2 102.5 4.0199 15.9 0.4 4U 1700-377 3.0 16.2 97.2 0.9802 3.9 2.2 GX 349+2 2.2 22.8 62.9 1.8299 5.3 5.9 GX 1+4 6.4 24.7 112.6 -0.6215 -1.8 8.8 4U 1735-44 0.0 41.2 32.3 0.5796 1.0 10.1 SW J1753.5-0127 5.2 28.8 68.8 0.8618 2.2 2.8 GX 5-1 5.1 28.5 70.2 0.9049 2.2 10.7 GRS 1758-258 8.8 37.0 53.1 0.7369 1.3 8.3 GX 17+2 5.6 32.4 81.5 1.1201 2.1 8.3 H1820-303 1.9 21.1 87.0 1.8611 6.1 2.4 GX 354-0 4.8 59.5 -161.7 6.2567 2.4 ------ UNKNOWN 4.2 41.1 -98.0 5.1088 2.8 ------ UNKNOWN 2.8 46.0 -123.8 6.2952 4.1 ------ UNKNOWN 4.7 52.0 -42.3 4.3281 2.5 ------ UNKNOWN

Analysis Summary

Notes:

Image

Pre-slew 15.0-350.0 keV image (Event data)

Light Curves

Full-time range; 1 s binning

Other quick-look light curves:

64 ms binning (zoomed) 16 ms binning (zoomed) 8 ms binning (zoomed) 2 ms binning (zoomed) SN=5 or 10 s binning (full-time range) Raw light curve

Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

S(15-50 keV) vs. S(50-150 keV) plot

Mask shadow pattern

Spacecraft aspect plot

Bright

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve