GRB060707: 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: Wed Jan 22 15:18:36 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger217704
======================================================================

  Trigger: 00217704      Segment: 000

  BAT Trigger Time: 174000620.8   [s; MET]
      Trigger Stop: 174000624.896   [s; MET]
               UTC: 2006-07-07T21:30:19.497320    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 357.079370004711   Dec: -17.9229403218212  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.58
     Image Trigger?:     NO
     Rate S/N Ratio:     11.4455231422596  [ if not an image trigger ]
     Image S/N Ratio:    8.58

  Analysis Position:   [ source = BAT ]
    RA: 357.079370004711   Dec: -17.9229403218212  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 357.073600420415   Dec: -17.9078990506836  [deg; J2000]  
        { 23h 48m 17.7s , -17d 54' 28.4" }
         +/- 1.44999154811882 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.548273793444466 [arcmin] (formal 1-sigma fit error)
    SNR: 17.8894207627549
 
  Angular difference between the analysis and refined position is 0.960709 arcmin
 
  Partial Coding Fraction: 0.4335938    [ including projection effects ]

  Duration
     T90: 66.6440000236034 +/- 6.37671418727915
        Measured from: -46.380000025034
                   to: 20.2639999985695     [s; relative to TRIGTIME]
     T50: 34.6480000019073 +/- 14.6414148361581
        Measured from: -24.9000000059605
                   to: 9.74799999594688     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 3.05199998617172     
                   to: 4.05199998617172     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -48.9560000002384     
                   to: 25.4439999759197     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.657173   1.097406   0.733202   0.138317
           0.066824   0.069174   0.060193   0.050796 [error]
 Peak      0.037270   0.048231   0.026118   0.012595
           0.008119   0.008631   0.007484   0.006149 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   74.400  -48.956   25.444
T90    66.644  -46.380   20.264
T50    34.648  -24.900    9.748
Peak    1.000    3.052    4.052
 
 
====== 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: CPL)
 
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      -1.672    -0.127      0.125       -           -               -         2.46e-03     -1.95e-04          1.95e-04      72.330   57
CPL     -0.424    -0.587      0.674       61.949      -8.236        15.016      1.06e-02     -5.22e-03          1.25e-02      57.320   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      -1.677     -0.373     0.358       -           -               -         8.18e-03     -1.81e-03          1.76e-03      62.460   57
CPL     -1.655      N/A       N/A         642.153      N/A           N/A         8.41e-03        N/A               N/A         62.470   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   2.74e-07  4.54e-07  5.70e-07  1.42e-06  1.70e-06  2.72e-06   erg/cm2
      90%_error_low -3.33e-08 -3.59e-08 -5.78e-08 -2.76e-07 -1.41e-07 -3.32e-07   erg/cm2
      90%_error_hi   3.44e-08  3.59e-08  5.77e-08  3.15e-07  1.41e-07  3.61e-07   erg/cm2
Peak flux       PL   3.99e-01  3.62e-01  2.26e-01  2.16e-01  1.08e+00  1.20e+00   ph/cm2/s
      90%_error_low -1.30e-01 -7.79e-02 -6.34e-02 -1.01e-01 -2.26e-01 -2.47e-01   ph/cm2/s
      90%_error_hi   1.40e-01  7.68e-02  6.21e-02  1.41e-01  2.27e-01  2.48e-01   ph/cm2/s
 
Fluence        CPL   2.24e-07  5.13e-07  6.07e-07  3.50e-07  1.58e-06  1.69e-06   erg/cm2
      90%_error_low -3.95e-08 -4.60e-08 -6.85e-08 -1.56e-07 -1.49e-07 -2.12e-07   erg/cm2
      90%_error_hi   4.07e-08  4.72e-08  6.85e-08  2.77e-07  1.51e-07  2.99e-07   erg/cm2
Peak flux      CPL   4.02e-01  3.60e-01  2.26e-01  2.24e-01  1.08e+00  1.22e+00   ph/cm2/s
      90%_error_low     N/A   -3.85e-02 -6.54e-02     N/A   -2.31e-01 -2.78e-01   ph/cm2/s
      90%_error_hi      N/A    9.37e-02  6.78e-02     N/A    2.28e-01  2.35e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  357.0736   -17.9079   0.0107    44.9616  -165.3545         2.5995885     17.889 TRIG_00217704                 
 
Foreground time interval of the image:
-48.956  25.444 (delta_t =  74.400 [sec])
Background time interval of the image:
-239.800 -48.956 (delta_t = 190.844 [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  -48.956 sec. to   25.444 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67201     ( -0.126973   0.125111 )
Norm@50keV  : 2.45783E-03    ( -0.000195506   0.000194676 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.33 using 59 PHA bins.
# Reduced chi-squared =          1.269 for     57 degrees of freedom 
# Null hypothesis probability =   8.296464e-02
 
Photon flux (15-150 keV)    in 74.4 sec: 0.323312 ( -0.025596  0.025652 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69739e-06 ( -1.40591e-07  1.41486e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -48.956 sec. to   25.444 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.424012     ( -0.587303   0.673985 )
Epeak [keV] : 61.9489      ( -8.23547 15.0161 )
Norm@50keV  : 1.06466E-02    ( -0.00522032   0.0125386 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          57.32 using 59 PHA bins.
# Reduced chi-squared =          1.024 for     56 degrees of freedom 
# Null hypothesis probability =   4.260018e-01
 
Photon flux (15-150 keV)    in 74.4 sec: 0.307221 ( -0.026502  0.026592 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.57693e-06 ( -1.48717e-07  1.51106e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    3.052 sec. to    4.052 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67716     ( -0.372798   0.357896 )
Norm@50keV  : 8.18457E-03    ( -0.00180886   0.0017647 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.46 using 59 PHA bins.
# Reduced chi-squared =          1.096 for     57 degrees of freedom 
# Null hypothesis probability =   2.885874e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.07852 ( -0.226399  0.22696 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.59347e-08 ( -1.7333e-08  1.7552e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    3.052 sec. to    4.052 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.65518     (       )
Epeak [keV] : 642.153      (   )
Norm@50keV  : 8.41252E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.47 using 59 PHA bins.
# Reduced chi-squared =          1.116 for     56 degrees of freedom 
# Null hypothesis probability =   2.572572e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.08014 ( -0.230708  0.22778 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.61185e-08 ( -1.84086e-08  1.75492e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 66.644 sec.
Hardness ratio (energy fluence ratio) = 1.18255129708

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

S(15-50 keV)  = 7.370122e-07
S(50-150 keV) = 8.399378e-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 = -9.662121362301983E-01, IMY = 2.524985327476902E-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:
-239.800000 -48.956000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.8385 -62.7268    7.8  58.8  -15.3  -1.2544  -1.5    5.6	GX 301-2                      
255.9957 -37.8192    2.2  46.3   44.0   3.2784   5.3    1.6	4U 1700-377                   
256.4960 -36.5438    6.0  46.8   45.6  -1.2710  -1.9    7.8	GX 349+2                      
264.7796 -44.3755    5.4  37.0   42.2   0.5443   2.1    4.7	4U 1735-44                    
275.8500 -30.4773    6.8  39.5   68.6   0.8708   1.7    7.7	H1820-303                     
285.1124 -24.8757   12.6  38.9   84.3  -0.4739  -0.9    4.9	HT1900.1-2455                 
296.0959 -17.5720    2.5  40.4  103.9   2.3850   4.6 ------	UNKNOWN                       
331.5966  -6.5799    3.2  47.3  156.5   1.4140   3.6 ------	UNKNOWN                       

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

Time interval of the image:
-48.956000 25.444000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.7665 -62.7247    3.5  58.8  -15.4   1.8204   3.3    4.1	GX 301-2                      
256.0671 -37.7830    4.3  46.2   44.1   1.0157   2.7    5.3	4U 1700-377                   
256.5913 -36.4514    4.4  46.8   45.8   1.0647   2.6    7.7	GX 349+2                      
264.5662 -44.5155   28.6  37.1   41.9   0.0717   0.4    8.5	4U 1735-44                    
276.0261 -30.4873    4.8  39.4   68.7  -0.7590  -2.4    8.9	H1820-303                     
284.9967 -24.7686    9.6  39.0   84.2   0.4001   1.2    9.4	HT1900.1-2455                 
357.0736 -17.9079    0.6  45.0 -165.4   2.5990  17.9 ------	UNKNOWN                       
165.0948 -68.6738    2.2  57.0  -27.8   2.5489   5.3 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
104.500620 962.260900
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
  8.2863 -36.4493    3.1  21.0   -8.6   1.3105   3.7 ------	UNKNOWN                       
353.3383  40.9895    3.8  59.0 -166.1   8.5184   3.0 ------	UNKNOWN                       
 23.2472   0.0436    3.9  31.3 -105.0   1.5494   2.9 ------	UNKNOWN