GRB060805A

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 14:33:54 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger222683
======================================================================

  Trigger: 00222683      Segment: 000

  BAT Trigger Time: 176446070.528   [s; MET]
      Trigger Stop: 176446074.624   [s; MET]
               UTC: 2006-08-05T04:47:49.167340    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 220.918978393931   Dec: 12.5923851602665  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.64
     Image Trigger?:     NO
     Rate S/N Ratio:     10.7238052947636  [ if not an image trigger ]
     Image S/N Ratio:    7.64

  Analysis Position:   [ source = BAT ]
    RA: 220.918978393931   Dec: 12.5923851602665  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 220.919   Dec: 12.5924  [deg; J2000]
        { 14h 43m 40.6s , +12d 35' 32.6" }
        +/- 2.65704343405 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.53167214015
 
 
  Angular difference between the analysis and refined position is 0.001547 arcmin
 
  Partial Coding Fraction: 0.9609375    [ including projection effects ]

  Duration
     T90: 4.92799997329712 +/- 1.3535848370652
        Measured from: -0.967999994754791
                   to: 3.95999997854233     [s; relative to TRIGTIME]
     T50: 1.85599997639656 +/- 1.57673080027528
        Measured from: 1.22400000691414
                   to: 3.0799999833107     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.715999990701675     
                   to: 1.71599999070168     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.22400000691414     
                   to: 4.52000001072884     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.058040   0.073028   0.019956  -0.001675
           0.011148   0.011449   0.009955   0.008474 [error]
 Peak      0.013319   0.021062   0.007894  -0.000102
           0.004809   0.004973   0.004196   0.003521 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    5.744   -1.224    4.520
T90     4.928   -0.968    3.960
T50     1.856    1.224    3.080
Peak    1.000    0.716    1.716
 
 
====== 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      -2.106    -0.403      0.356       -           -               -         1.37e-03     -4.00e-04          3.94e-04      62.310   57
CPL      0.494    -2.252      7.380       31.941      -7.448        12.564      7.07e-02     -7.07e-02          8.47e+03      58.200   56
 
 
=== 1-s peak 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      -1.684     -0.575     0.543       -           -               -         2.35e-03     -9.20e-04          9.03e-04      53.050   57
CPL      0.481     -1.358    -0.481       43.330     -15.306        17.308      4.72e-02     -4.72e-02          1.76e+05      50.330   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   1.78e-08  2.27e-08  2.11e-08  3.44e-08  7.31e-08  9.58e-08   erg/cm2
      90%_error_low -4.38e-09 -4.97e-09 -7.79e-09 -1.93e-08 -1.87e-08 -3.12e-08   erg/cm2
      90%_error_hi   4.47e-09  4.88e-09  8.57e-09  3.16e-08  2.00e-08  4.13e-08   erg/cm2
Peak flux       PL   1.15e-01  1.04e-01  6.49e-02  6.16e-02  3.10e-01  3.46e-01   ph/cm2/s
      90%_error_low -5.32e-02 -3.64e-02 -3.23e-02 -6.16e-02 -1.08e-01 -1.22e-01   ph/cm2/s
      90%_error_hi   5.81e-02  3.63e-02  3.19e-02  7.32e-02  1.08e-01  1.26e-01   ph/cm2/s
 
Fluence        CPL   1.70e-08  2.93e-08  8.88e-09  1.99e-10  5.53e-08  5.55e-08   erg/cm2
      90%_error_low -5.02e-09 -7.47e-09 -7.92e-09    N/A    -1.46e-08 -1.48e-08   erg/cm2
      90%_error_hi   4.97e-09  7.60e-09  1.54e-08    N/A     2.22e-08  2.64e-08   erg/cm2
Peak flux      CPL   8.95e-02  1.72e-01  1.24e-02  1.72e-06  2.74e-01  2.74e-01   ph/cm2/s
      90%_error_low -5.31e-02 -6.57e-02 -1.24e-02 -1.72e-06 -9.37e-02 -9.38e-02   ph/cm2/s
      90%_error_hi   6.74e-02  6.03e-02  6.87e-02  2.18e-02  1.03e-01  1.03e-01   ph/cm2/s
 
======================================================================

Special notes of this burst

Image

Pre-slew 15.0-50.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
220.919 12.592 0.000 8.780 104.685 0.103 7.532 TRIG_00222683
 
Image time interval: 0.000 to 4.096 [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   -1.224 sec. to    4.520 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.10552     ( -0.403144   0.35626 )
Norm@50keV  : 1.36950E-03    ( -0.000399684   0.000393865 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.31 using 59 PHA bins.
# Reduced chi-squared =          1.093 for     57 degrees of freedom 
# Null hypothesis probability =   2.929173e-01
 
Photon flux (15-150 keV)    in 5.744 sec: 0.216062 ( -0.044058  0.044115 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.31349e-08 ( -1.87167e-08  1.99704e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.224 sec. to    4.520 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.47728     ( -2.28629   7.34479 )
Epeak [keV] : 31.2362      ( -7.40002 12.6119 )
Norm@50keV  : 0.337298    ( -0.317405   8471.08 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.11 using 59 PHA bins.
# Reduced chi-squared =          1.038 for     56 degrees of freedom 
# Null hypothesis probability =   3.973423e-01
 
Photon flux (15-150 keV)    in 5.744 sec: 0.202887 ( -0.043358  0.0443 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.53075e-08 ( -1.46235e-08  2.22483e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.716 sec. to    1.716 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.68405     ( -0.577555   0.540071 )
Norm@50keV  : 2.34740E-03    ( -0.000920863   0.000901579 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.05 using 59 PHA bins.
# Reduced chi-squared =         0.9307 for     57 degrees of freedom 
# Null hypothesis probability =   6.240239e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.310040 ( -0.107982  0.108026 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.17826e-08 ( -8.58728e-09  9.1531e-09 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.716 sec. to    1.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 6.81498     ( -7.71027   -6.83307 )
Epeak [keV] : 33.4660      ( -5.42546 27.1885 )
Norm@50keV  : 937.875    ( -1007.16   174704 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          48.69 using 59 PHA bins.
# Reduced chi-squared =         0.8695 for     56 degrees of freedom 
# Null hypothesis probability =   7.450862e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.273793 ( -0.093675  0.102715 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.34524e-08 ( -4.7632e-09  9.25461e-09 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 4.928 sec.
Hardness ratio (energy fluence ratio) = 0.92939435545

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

S(15-50 keV)  = 4.045475e-08
S(50-150 keV) = 3.268093e-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 = -0.0391541225918, IMY = -0.149408628234

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:
-239.528000 -1.224000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5031  35.3755   15.7  41.1   40.9   0.2586   0.7    3.0	Her X-1                       
241.8999  -4.4646    2.5  35.7  110.1   1.7231   4.6 ------	UNKNOWN                       
201.1323 -33.2564    3.7  51.5  178.5   1.3145   3.2 ------	UNKNOWN

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

Time interval of the image:
-1.224000 4.520000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4753  35.5100    5.6  41.1   40.7   0.1005   2.1   10.1	Her X-1                       
226.2703  16.6107    1.8  12.7   75.5   0.1340   6.3 ------	UNKNOWN                       
220.9346  12.5770    1.7   8.8  104.7   0.1418   6.8 ------	UNKNOWN                       
201.3654 -23.6877    2.6  42.2 -178.3   0.1387   4.4 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
77.372600 934.972600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9729 -15.6500    0.4  37.0  123.4  32.2905  28.2    0.7	Sco X-1                       
254.3612  35.2527   46.7  37.7   31.6   0.1956   0.2    7.2	Her X-1                       
207.3283 -40.0910    3.0  54.2  177.0   6.7998   3.8 ------	UNKNOWN

Analysis Summary

Notes:

Image

Pre-slew 15.0-50.0 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