GRB060510B: 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 16:31:28 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger209352
======================================================================

  Trigger: 00209352      Segment: 000

  BAT Trigger Time: 168942136   [s; MET]
      Trigger Stop: 168942200   [s; MET]
               UTC: 2006-05-10T08:22:14.815740    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 239.141458616034   Dec: 78.5593987782931  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.54
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.54

  Analysis Position:   [ source = BAT ]
    RA: 239.141458616034   Dec: 78.5593987782931  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 239.290239064342   Dec: 78.5624064417199  [deg; J2000]  
        { 15h 57m 09.7s , +78d 33' 44.7" }
         +/- 1.89063030219652 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.869039888702695 [arcmin] (formal 1-sigma fit error)
    SNR: 12.2452053862035
 
  Angular difference between the analysis and refined position is 1.779597 arcmin
 
  Partial Coding Fraction: 0.96875    [ including projection effects ]

  Duration
     T90: 262.936000019312 +/- 9.03104688621087
        Measured from: 43.9679999947548
                   to: 306.904000014067     [s; relative to TRIGTIME]
     T50: 129.732000023127 +/- 11.1911107800654
        Measured from: 121.263999998569
                   to: 250.996000021696     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 136.384000003338     
                   to: 137.384000003338     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 25.5959999859333     
                   to: 326.043999999762     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.519392   2.686179   1.744223   0.300014
           0.078386   0.081615   0.071862   0.063926 [error]
 Peak      0.026826   0.020290   0.020811   0.010113
           0.004836   0.004941   0.004446   0.003704 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  300.448   25.596  326.044
T90   262.936   43.968  306.904
T50   129.732  121.264  250.996
Peak    1.000  136.384  137.384
 
 
====== 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      -1.765    -0.075      0.074       -           -               -         1.44e-03     -5.74e-05          5.71e-05      44.420   57
CPL     -1.589    -0.230      0.300      113.805     -43.810      -113.805      1.76e-03     -3.69e-04          7.19e-04      43.310   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      -1.398     -0.357     0.356       -           -               -         4.67e-03     -9.38e-04          9.25e-04      56.480   57
CPL     -1.397     -0.357     0.935     9999.310    -9999.310      -9999.310      4.68e-03     -9.42e-04          8.99e-03      56.480   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   7.07e-07  1.11e-06  1.30e-06  2.96e-06  3.98e-06  6.08e-06   erg/cm2
      90%_error_low -4.67e-08 -4.27e-08 -7.19e-08 -3.43e-07 -1.64e-07 -3.98e-07   erg/cm2
      90%_error_hi   4.78e-08  4.26e-08  7.19e-08  3.73e-07  1.65e-07  4.22e-07   erg/cm2
Peak flux       PL   1.74e-01  1.86e-01  1.41e-01  1.75e-01  5.68e-01  6.77e-01   ph/cm2/s
      90%_error_low -5.72e-02 -3.93e-02 -3.63e-02 -7.77e-02 -1.11e-01 -1.36e-01   ph/cm2/s
      90%_error_hi   6.19e-02  3.83e-02  3.54e-02  1.10e-01  1.11e-01  1.40e-01   ph/cm2/s
 
Fluence        CPL   6.85e-07  1.12e-06  1.31e-06  2.24e-06  3.91e-06  5.35e-06   erg/cm2
      90%_error_low -5.79e-08 -4.95e-08 -7.39e-08 -7.80e-07 -1.97e-07 -8.11e-07   erg/cm2
      90%_error_hi   5.88e-08  5.01e-08  7.44e-08  8.26e-07  1.97e-07  8.85e-07   erg/cm2
Peak flux      CPL   1.74e-01  1.86e-01  1.41e-01  1.74e-01  5.72e-01  6.80e-01   ph/cm2/s
      90%_error_low     N/A       N/A       N/A       N/A       N/A   -1.71e-01   ph/cm2/s
      90%_error_hi      N/A       N/A       N/A       N/A       N/A    1.25e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  239.2902    78.5624   0.0157    11.9745  -112.2494         0.7717945     12.245 TRIG_00209352                 
 
Foreground time interval of the image:
 25.596  73.101 (delta_t =  47.505 [sec])
Background time interval of the image:
-199.299  25.596 (delta_t = 224.895 [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   25.596 sec. to  326.044 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.76511     ( -0.0746321   0.0739237 )
Norm@50keV  : 1.43726E-03    ( -5.74111e-05   5.71452e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.42 using 59 PHA bins.
# Reduced chi-squared =         0.7794 for     57 degrees of freedom 
# Null hypothesis probability =   8.876127e-01
 
Photon flux (15-150 keV)    in 300.4 sec: 0.195446 ( -0.007697  0.007717 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.98135e-06 ( -1.64195e-07  1.65036e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   25.596 sec. to  326.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.58937     ( -0.230291   0.300067 )
Epeak [keV] : 113.805      ( -43.8101 -113.805 )
Norm@50keV  : 1.76422E-03    ( -0.000369258   0.000718933 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.31 using 59 PHA bins.
# Reduced chi-squared =         0.7733 for     56 degrees of freedom 
# Null hypothesis probability =   8.925280e-01
 
Photon flux (15-150 keV)    in 300.4 sec: 0.192902 ( -0.008652  0.008673 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.91256e-06 ( -1.96866e-07  1.9676e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from  136.384 sec. to  137.384 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.39765     ( -0.356926   0.356376 )
Norm@50keV  : 4.66886E-03    ( -0.000938389   0.000924567 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.48 using 59 PHA bins.
# Reduced chi-squared =         0.9908 for     57 degrees of freedom 
# Null hypothesis probability =   4.946538e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.568287 ( -0.110665  0.110849 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.51409e-08 ( -1.0152e-08  1.03664e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  136.384 sec. to  137.384 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.39724     ( -0.356796   0.934854 )
Epeak [keV] : 9999.31      ( -9999.36 -9999.36 )
Norm@50keV  : 4.68333E-03    ( -0.000942112   0.00898848 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.48 using 59 PHA bins.
# Reduced chi-squared =          1.009 for     56 degrees of freedom 
# Null hypothesis probability =   4.568041e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.571762 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.54831e-08 ( -1.20782e-08  6.15973e-09 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 262.936 sec.
Hardness ratio (energy fluence ratio) = 1.17684754045

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

S(15-50 keV)  = 1.8136977e-06
S(50-150 keV) = 2.1676418e-06

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 = -8.030628526871948E-02, IMY = 1.963009154542183E-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:
-199.299410 25.596000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.2808  35.3784    3.7  32.2   48.6   0.7494   3.2    8.9	Her X-1                       
299.5858  35.2031    0.5  45.7   -7.7   6.4363  21.6    0.2	Cyg X-1                       
308.0795  40.9187    2.1  44.1  -19.9   1.4588   5.5    2.5	Cyg X-3                       
326.1214  38.1813    9.0  53.6  -34.0   1.0010   1.3    8.8	Cyg X-2                       
216.8129  29.2435    2.4  40.1  102.9   2.7577   4.8 ------	UNKNOWN                       
252.3754  28.4802    2.4  38.8   53.2   1.8418   4.9 ------	UNKNOWN                       
178.5828  72.7529    2.4  21.4 -156.7   0.6991   4.9 ------	UNKNOWN                       
315.8284  33.6289    3.0  53.5  -22.2   1.7292   3.9 ------	UNKNOWN                       
115.8825  60.5039    3.0  46.6 -144.3   1.3764   3.8 ------	UNKNOWN                       

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

Time interval of the image:
25.596000 73.100620
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4735  35.1967    5.0  32.4   48.4   0.2374   2.3    8.8	Her X-1                       
299.5810  35.2140   10.4  45.7   -7.7  -0.1412  -1.1    0.9	Cyg X-1                       
308.0401  40.9526   55.7  44.1  -19.9   0.0239   0.2    3.2	Cyg X-3                       
326.0545  38.1742    6.1  53.6  -33.9  -0.5539  -1.9   10.4	Cyg X-2                       
239.2903  78.5625    0.9  12.0 -112.2   0.7719  12.2 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
107.900600 423.014200
541.000000 603.110000
721.000000 783.054100
901.000000 963.060000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5940  35.1957    0.6  49.8   10.0  14.4017  20.3    0.4	Cyg X-1                       
308.0333  40.9324    2.0  45.9   -0.6   3.1298   5.6    3.7	Cyg X-3                       
326.0900  38.3743    4.6  51.9  -17.5   1.5895   2.5    5.0	Cyg X-2                       
239.1455  78.5647    0.5   0.0 -104.0   6.0762  22.3 ------	UNKNOWN                       
310.7113  31.5886    3.0  55.5   -0.3   4.2824   3.9 ------	UNKNOWN                       
130.7035  35.2123    2.8  59.1 -166.1   8.3834   4.0 ------	UNKNOWN                       
340.6187  52.7177    2.5  40.9  -36.5   1.9322   4.6 ------	UNKNOWN