GRB051210

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 19:28:28 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger171931
======================================================================

  Trigger: 00171931      Segment: 000

  BAT Trigger Time: 155886381.056   [s; MET]
      Trigger Stop: 155886382.08   [s; MET]
               UTC: 2005-12-10T05:46:21.168500    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 330.196613815793   Dec: -57.6339823400996  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.97
     Image Trigger?:     NO
     Rate S/N Ratio:     15.7797338380595  [ if not an image trigger ]
     Image S/N Ratio:    8.97

  Analysis Position:   [ source = BAT ]
    RA: 330.196613815793   Dec: -57.6339823400996  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 330.188381954684   Dec: -57.6241946318991  [deg; J2000]  
        { 22h 00m 45.2s , -57d 37' 27.1" }
         +/- 1.98445274791184 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.999622029534953 [arcmin] (formal 1-sigma fit error)
    SNR: 11.4266070050524
 
  Angular difference between the analysis and refined position is 0.644054 arcmin
 
  Partial Coding Fraction: 0.8984375    [ including projection effects ]

  Duration
     T90: 1.30000001192093 +/- 0.295194849441729
        Measured from: -0.203999996185303
                   to: 1.09600001573563     [s; relative to TRIGTIME]
     T50: 0.560000002384186 +/- 0.28677516664519
        Measured from: 0.240000009536743
                   to: 0.800000011920929     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.11599999666214     
                   to: 1.11599999666214     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.263999998569489     
                   to: 1.19600000977516     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.024784   0.039606   0.042895   0.015921
           0.005842   0.006308   0.005789   0.004936 [error]
 Peak      0.019171   0.030040   0.038293   0.011802
           0.004835   0.005329   0.004884   0.004177 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    1.460   -0.264    1.196
T90     1.300   -0.204    1.096
T50     0.560    0.240    0.800
Peak    1.000    0.116    1.116
 
 
====== 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      -1.051    -0.266      0.276       -           -               -         5.54e-03     -8.44e-04          8.40e-04      62.320   57
CPL     -0.745    -0.542      1.224      243.930    -243.930      -243.930      7.50e-03     -3.46e-03          1.57e-02      62.050   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      -0.924     -0.268     0.284       -           -               -         6.69e-03     -1.06e-03          1.04e-03      50.090   57
CPL     -0.575     -0.585     1.331      250.849    -250.849      -250.849      9.32e-03     -3.54e-03          2.04e-02      49.770   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   6.79e-09  1.65e-08  3.18e-08  1.51e-07  8.60e-08  2.06e-07   erg/cm2
      90%_error_low -2.00e-09 -3.07e-09 -5.44e-09 -5.15e-08 -1.40e-08 -5.52e-08   erg/cm2
      90%_error_hi   2.21e-09  2.99e-09  5.35e-09  6.82e-08  1.41e-08  6.97e-08   erg/cm2
Peak flux       PL   1.59e-01  2.26e-01  2.38e-01  4.63e-01  7.68e-01  1.09e+00   ph/cm2/s
      90%_error_low -5.02e-02 -4.66e-02 -3.80e-02 -1.45e-01 -1.21e-01 -1.77e-01   ph/cm2/s
      90%_error_hi   5.69e-02  4.56e-02  3.76e-02  1.85e-01  1.22e-01  1.87e-01   ph/cm2/s
 
Fluence        CPL   6.25e-09  1.67e-08  3.29e-08  1.04e-07  8.50e-08  1.60e-07   erg/cm2
      90%_error_low -2.61e-09 -3.23e-09 -6.26e-09 -6.92e-08 -1.46e-08 -7.03e-08   erg/cm2
      90%_error_hi   2.62e-09  3.30e-09  6.73e-09  6.22e-08  1.45e-08  8.44e-08   erg/cm2
Peak flux      CPL   1.42e-01  2.27e-01  2.49e-01  3.39e-01  7.56e-01  9.58e-01   ph/cm2/s
      90%_error_low -6.72e-02 -4.93e-02 -4.58e-02 -1.95e-01 -1.28e-01 -2.50e-01   ph/cm2/s
      90%_error_hi   6.93e-02  4.87e-02  5.05e-02  1.71e-01  1.26e-01  2.92e-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
  330.1884   -57.6242   0.0169    27.2103  -162.8858         0.1251672     11.427 TRIG_00171931                 
 
Foreground time interval of the image:
 -0.264   1.196 (delta_t =   1.460 [sec])
Background time interval of the image:
-299.056  -0.264 (delta_t = 298.792 [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   -0.264 sec. to    1.196 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.05057     ( -0.266097   0.275885 )
Norm@50keV  : 5.54247E-03    ( -0.000843977   0.000840262 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.32 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     57 degrees of freedom 
# Null hypothesis probability =   2.926559e-01
 
Photon flux (15-150 keV)    in 1.46 sec: 0.640162 ( -0.099827  0.100347 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.59949e-08 ( -1.40363e-08  1.41394e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.264 sec. to    1.196 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.745243     ( -0.542066   1.22439 )
Epeak [keV] : 243.930      ( -243.88 -243.88 )
Norm@50keV  : 7.50237E-03    ( -0.00346295   0.0157108 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.05 using 59 PHA bins.
# Reduced chi-squared =          1.108 for     56 degrees of freedom 
# Null hypothesis probability =   2.692739e-01
 
Photon flux (15-150 keV)    in 1.46 sec: 0.631286 ( -0.104663  0.103998 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.50105e-08 ( -1.45846e-08  1.45169e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.116 sec. to    1.116 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.924194     ( -0.26824   0.283785 )
Norm@50keV  : 6.68892E-03    ( -0.00105681   0.00104246 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.09 using 59 PHA bins.
# Reduced chi-squared =         0.8787 for     57 degrees of freedom 
# Null hypothesis probability =   7.298975e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.767991 ( -0.121163  0.121999 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.43807e-08 ( -1.19584e-08  1.20245e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.116 sec. to    1.116 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.574966     ( -0.585752   1.33019 )
Epeak [keV] : 250.849      ( -250.441 -250.441 )
Norm@50keV  : 9.32436E-03    ( -0.00354924   0.0203493 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          49.77 using 59 PHA bins.
# Reduced chi-squared =         0.8888 for     56 degrees of freedom 
# Null hypothesis probability =   7.082483e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.755856 ( -0.127607  0.12643 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.35377e-08 ( -1.24111e-08  1.23182e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 1.3 sec.
Hardness ratio (energy fluence ratio) = 1.93112378957

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

S(15-50 keV)  = 2.3254068e-08
S(50-150 keV) = 6.274165e-08

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 = -4.913912948410936E-01, IMY = 1.513051605122284E-01

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:
-299.056000 -0.264000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
284.8855 -24.8098  104.1  38.3  -72.6  -0.0584  -0.1   10.5	HT1900.1-2455                 
288.8152  10.9670    3.2  55.9  -28.7   3.3522   3.7    1.6	GRS 1915+105                  
323.0864 -28.1570    2.9   4.8  -43.0   0.6781   4.0 ------	UNKNOWN                       
280.0281 -30.2061    2.9  41.0  -82.6   3.3152   3.9 ------	UNKNOWN

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

Time interval of the image:
-0.264000 1.196000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
285.0013 -24.8730    9.2  38.2  -72.7  -0.0365  -1.3    3.4	HT1900.1-2455                 
288.7620  10.7945 2700.0  55.8  -28.9   0.0001   0.0    9.3	GRS 1915+105                  
330.1885 -57.6241    1.0  27.2 -162.9   0.1252  11.4 ------	UNKNOWN                       
322.9227 -58.2166    2.4  28.0 -154.6   0.0547   4.9 ------	UNKNOWN                       
 49.2967 -83.8558    2.4  58.8 -167.4   0.3341   4.8 ------	UNKNOWN                       
294.6609  18.8703    2.0  58.8  -17.6   0.3939   5.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
68.044590 303.049400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.4757 -62.8221   10.8  56.4 -162.3   0.6876   1.1    5.9	GX 301-2                      
264.7779 -44.4865   13.0  41.3 -102.1   0.6697   0.9    2.7	4U 1735-44                    
  2.8272 -23.9156    3.2  41.0   47.5   1.4241   3.6 ------	UNKNOWN                       
312.5843  -5.9179    2.5  53.5  -23.2   2.0304   4.6 ------	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 source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

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

Post-slew image of 15-350 keV band

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