GRB071011: Summary Image Light curves Spectra Distribution Others

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: Mon Jan 20 06:31:39 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger293924
======================================================================

  Trigger: 00293924      Segment: 000

  BAT Trigger Time: 213799216.128   [s; MET]
      Trigger Stop: 213799217.152   [s; MET]
               UTC: 2007-10-11T12:40:13.844040    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 8.40009894747049   Dec: 61.0725216897883  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.99
     Image Trigger?:     NO
     Rate S/N Ratio:     16.0934769394311  [ if not an image trigger ]
     Image S/N Ratio:    7.99

  Analysis Position:   [ source = BAT ]
    RA: 8.40009894747049   Dec: 61.0725216897883  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 8.39221826562756   Dec: 61.1333940733554  [deg; J2000]  
        { 00h 33m 34.1s , +61d 08' 00.2" }
         +/- 1.28916649345966 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.54343984342533 [arcmin] (formal 1-sigma fit error)
    SNR: 21.1608973752607
 
  Angular difference between the analysis and refined position is 3.659483 arcmin
 
  Partial Coding Fraction: 0.3710938    [ including projection effects ]

  Duration
     T90: 65.8799999952316 +/- 15.4834462517568
        Measured from: -4.22799998521805
                   to: 61.6520000100136     [s; relative to TRIGTIME]
     T50: 42.2759999930859 +/- 2.87055395726043
        Measured from: 4.52000001072884
                   to: 46.7960000038147     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 45.9760000109673     
                   to: 46.9760000109673     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -9.47200000286102     
                   to: 77.6520000100136     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.950219   1.159803   1.077543   0.355721
           0.076134   0.079967   0.071102   0.062446 [error]
 Peak      0.059304   0.059166   0.080057   0.016568
           0.008994   0.009944   0.009300   0.007743 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   87.124   -9.472   77.652
T90    65.880   -4.228   61.652
T50    42.276    4.520   46.796
Peak    1.000   45.976   46.976
 
 
====== 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: N/A)
 
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      -1.444    -0.125      0.125       -           -               -         2.83e-03     -1.91e-04          1.90e-04      90.340   57
CPL     -1.441    -0.126      0.156     9999.300    -9999.300      -9999.300      2.84e-03     -1.91e-04          8.96e-04      90.360   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      -1.288     -0.250     0.250       -           -               -         1.49e-02     -2.02e-03          2.02e-03      45.270   57
CPL     -1.248     -1.501     0.750      995.520      N/A           N/A         1.56e-02        N/A               N/A         45.320   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   2.98e-07  5.67e-07  8.34e-07  2.63e-06  2.36e-06  4.33e-06   erg/cm2
      90%_error_low -3.73e-08 -4.23e-08 -7.21e-08 -4.77e-07 -1.74e-07 -5.28e-07   erg/cm2
      90%_error_hi   3.88e-08  4.19e-08  7.16e-08  5.46e-07  1.75e-07  5.84e-07   erg/cm2
Peak flux       PL   5.00e-01  5.71e-01  4.67e-01  6.40e-01  1.77e+00  2.18e+00   ph/cm2/s
      90%_error_low -1.26e-01 -9.08e-02 -7.75e-02 -2.02e-01 -2.47e-01 -3.07e-01   ph/cm2/s
      90%_error_hi   1.37e-01  8.87e-02  7.57e-02  2.53e-01  2.48e-01  3.12e-01   ph/cm2/s
 
Fluence        CPL   3.03e-07  5.63e-07  8.27e-07  2.80e-06  2.37e-06  4.19e-06   erg/cm2
      90%_error_low    N/A    -5.52e-08 -9.34e-08 -1.04e-06 -2.53e-07 -7.80e-07   erg/cm2
      90%_error_hi     N/A     6.40e-08  1.06e-07  6.14e-08  2.32e-07  6.98e-07   erg/cm2
Peak flux      CPL   5.00e-01  5.68e-01  4.66e-01  6.37e-01  1.78e+00  2.21e+00   ph/cm2/s
      90%_error_low     N/A       N/A       N/A       N/A       N/A   -5.05e-01   ph/cm2/s
      90%_error_hi      N/A       N/A       N/A       N/A       N/A    2.87e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
    8.3922    61.1334   0.0091    36.5268   145.7169         3.9627253     21.161 TRIG_00293924                 
 
Foreground time interval of the image:
 -9.472  77.652 (delta_t =  87.124 [sec])
Background time interval of the image:
-239.128  -9.472 (delta_t = 229.656 [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

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   -9.472 sec. to   77.652 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.44391     ( -0.12546   0.125419 )
Norm@50keV  : 2.82624E-03    ( -0.000190713   0.000190295 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          90.34 using 59 PHA bins.
# Reduced chi-squared =          1.585 for     57 degrees of freedom 
# Null hypothesis probability =   3.238053e-03
 
Photon flux (15-150 keV)    in 87.12 sec: 0.347780 ( -0.024468  0.024581 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.35911e-06 ( -1.73821e-07  1.74844e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -9.472 sec. to   77.652 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.4414     ( -0.125872   0.156447 )
Epeak [keV] : 9999.30      ( -9999.35 -9999.35 )
Norm@50keV  : 2.83556E-03    ( -0.00019122   0.000896178 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          90.36 using 59 PHA bins.
# Reduced chi-squared =          1.614 for     56 degrees of freedom 
# Null hypothesis probability =   2.466700e-03
 
Photon flux (15-150 keV)    in 87.12 sec: 0.347741 ( -0.024514  0.024545 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.37093e-06 ( -2.5282e-07  2.32335e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   45.976 sec. to   46.976 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.28836     ( -0.249578   0.249623 )
Norm@50keV  : 1.48747E-02    ( -0.00202468   0.00202034 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.27 using 59 PHA bins.
# Reduced chi-squared =         0.7941 for     57 degrees of freedom 
# Null hypothesis probability =   8.689326e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.77085 ( -0.24733  0.24836 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.47431e-07 ( -2.24281e-08  2.26007e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   45.976 sec. to   46.976 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.11695     ( -0.632318   1.6192 )
Epeak [keV] : 43.3997      (   )
Norm@50keV  : 4.67231E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          45.14 using 59 PHA bins.
# Reduced chi-squared =         0.8061 for     56 degrees of freedom 
# Null hypothesis probability =   8.501488e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.77770 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.47802e-07 ( -2.41816e-08  1.70598e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = N/A

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

S(15-50 keV)  = N/A
S(50-150 keV) = N/A

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 = -6.120018621672628E-01, IMY = -4.172149212453142E-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:
-239.128000 -9.472000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6307  22.0118    0.3  37.1   22.2   9.3070  33.4    0.2	Crab                          
 25.3066  48.3131    2.9  36.2  118.5   1.4957   4.0 ------	UNKNOWN                       
344.4094  53.5971    3.0  51.1  149.9   3.6281   3.9 ------	UNKNOWN                       
 88.9460   8.4175    2.3  50.7   14.7   2.7341   4.9 ------	UNKNOWN                       
335.5182  66.9809    2.4  44.1  166.4   1.5453   4.7 ------	UNKNOWN                       
137.4544  33.3987    3.9  42.2  -57.5   1.8325   2.9 ------	UNKNOWN                       
136.2027  25.3954    4.0  48.2  -49.9   2.8591   2.9 ------	UNKNOWN                       
155.5993  47.6601    2.9  40.9  -87.4   3.6849   4.0 ------	UNKNOWN                       

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

Time interval of the image:
-9.472000 77.652000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.5124  21.9621  245.2  37.2   22.4  -0.0074  -0.0    7.4	Crab                          
 72.7798  20.4974    2.1  39.8   38.1   1.2485   5.5 ------	UNKNOWN                       
  8.3922  61.1334    0.5  36.5  145.7   3.9626  21.1 ------	UNKNOWN                       
245.7847  71.5138    2.6  48.6 -153.3   1.0132   4.3 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
415.172600 962.932000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5747  35.4031   14.3  48.3 -162.8  -0.5094  -0.8    6.8	Her X-1                       
274.8369  34.6717    3.8  56.9  179.3   5.4308   3.1 ------	UNKNOWN                       
219.0219  58.6863    2.5  15.7 -153.1   1.2339   4.6 ------	UNKNOWN                       
152.1214  24.8590    2.5  47.6  -31.4   2.7254   4.6 ------	UNKNOWN                       
249.5722  26.8507    4.0  53.9 -152.9   2.9602   2.9 ------	UNKNOWN                       
243.9114  23.1040    4.2  55.2 -145.3   5.8461   2.8 ------	UNKNOWN