GRB060102: 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 19:15:24 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger175603
======================================================================

  Trigger: 00175603      Segment: 000

  BAT Trigger Time: 157929448.896   [s; MET]
      Trigger Stop: 157929450.944   [s; MET]
               UTC: 2006-01-02T21:17:27.963420    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 328.85223917685   Dec: -1.84590276569756  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.21
     Image Trigger?:     NO
     Rate S/N Ratio:     13.3041346956501  [ if not an image trigger ]
     Image S/N Ratio:    8.21

  Analysis Position:   [ source = BAT ]
    RA: 328.85223917685   Dec: -1.84590276569756  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 328.841195237682   Dec: -1.83606774698592  [deg; J2000]  
        { 21h 55m 21.9s , -01d 50' 09.8" }
         +/- 2.67092463108443 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.7362933849769 [arcmin] (formal 1-sigma fit error)
    SNR: 7.47483759455809
 
  Angular difference between the analysis and refined position is 0.887047 arcmin
 
  Partial Coding Fraction: 0.890625    [ including projection effects ]

  Duration
     T90: 19 +/- 5.09901951359278
        Measured from: -0.895999997854233
                   to: 18.1040000021458     [s; relative to TRIGTIME]
     T50: 14 +/- 9.5524865872714
        Measured from: 0.104000002145767
                   to: 14.1040000021458     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.104000002145767     
                   to: 1.10400000214577     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.895999997854233     
                   to: 22.1040000021458     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.093446   0.102287   0.121356   0.020275
           0.023414   0.023944   0.020542   0.016950 [error]
 Peak      0.012625   0.011580   0.021615   0.009730
           0.005013   0.005339   0.004579   0.003861 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   23.000   -0.896   22.104
T90    19.000   -0.896   18.104
T50    14.000    0.104   14.104
Peak    1.000    0.104    1.104
 
 
====== 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      -1.244    -0.377      0.387       -           -               -         1.01e-03     -1.95e-04          1.95e-04      55.510   57
CPL     -1.258    -2.769      0.579     9999.360      N/A           N/A         1.01e-03        N/A               N/A         55.530   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      -0.627     -0.554     0.695       -           -               -         3.32e-03     -1.21e-03          1.07e-03      44.610   57
CPL     -0.630     -0.547     1.023     9999.360    -9999.360      -9999.360      3.36e-03     -1.23e-03          1.06e-02      44.620   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   2.34e-08  5.04e-08  8.51e-08  3.30e-07  2.34e-07  4.89e-07   erg/cm2
      90%_error_low -8.68e-09 -1.16e-08 -2.08e-08 -1.53e-07 -5.04e-08 -1.69e-07   erg/cm2
      90%_error_hi   9.71e-09  1.11e-08  2.00e-08  2.30e-07  5.10e-08  2.35e-07   erg/cm2
Peak flux       PL   5.97e-02  1.01e-01  1.31e-01  3.44e-01  3.87e-01  6.36e-01   ph/cm2/s
      90%_error_low -3.90e-02 -4.87e-02 -3.52e-02 -1.78e-01 -1.15e-01 -1.92e-01   ph/cm2/s
      90%_error_hi   5.55e-02  4.77e-02  3.52e-02  3.16e-01  1.17e-01  2.58e-01   ph/cm2/s
 
Fluence        CPL   2.35e-08  5.04e-08  8.24e-08  3.38e-07  2.33e-07  4.67e-07   erg/cm2
      90%_error_low    N/A    -1.18e-08    N/A    -2.38e-07 -5.08e-08 -2.10e-07   erg/cm2
      90%_error_hi     N/A     1.13e-08    N/A     8.50e-08  5.20e-08  2.36e-07   erg/cm2
Peak flux      CPL   5.95e-02  1.01e-01  1.32e-01  3.40e-01  3.87e-01  6.68e-01   ph/cm2/s
      90%_error_low     N/A       N/A       N/A       N/A   -1.15e-01 -3.15e-01   ph/cm2/s
      90%_error_hi      N/A       N/A       N/A       N/A    1.17e-01  2.73e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  328.8412    -1.8361   0.0256    18.7200  -131.2042         0.3377734      7.475 TRIG_00175603                 
 
Foreground time interval of the image:
 -0.896  22.104 (delta_t =  23.000 [sec])
Background time interval of the image:
-299.896  -0.896 (delta_t = 299.000 [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   -0.896 sec. to   22.104 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.24394     ( -0.376932   0.387174 )
Norm@50keV  : 1.01434E-03    ( -0.000194738   0.000194725 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.51 using 59 PHA bins.
# Reduced chi-squared =         0.9739 for     57 degrees of freedom 
# Null hypothesis probability =   5.311241e-01
 
Photon flux (15-150 keV)    in 23 sec: 0.119853 ( -0.0239637  0.024037 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33887e-07 ( -5.04454e-08  5.10034e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.896 sec. to   22.104 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.79054     ( -1.23623   2.11208 )
Epeak [keV] : 237.791      (   )
Norm@50keV  : 1.76748E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.49 using 59 PHA bins.
# Reduced chi-squared =         0.9730 for     56 degrees of freedom 
# Null hypothesis probability =   5.322887e-01
 
Photon flux (15-150 keV)    in 23 sec: 0.119883 ( -0.024016  0.023987 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33448e-07 ( -5.08153e-08  5.20403e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    0.104 sec. to    1.104 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.62703     ( -0.554258   0.695139 )
Norm@50keV  : 3.32321E-03    ( -0.00121276   0.00106957 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.61 using 59 PHA bins.
# Reduced chi-squared =         0.7826 for     57 degrees of freedom 
# Null hypothesis probability =   8.836512e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.386778 ( -0.115037  0.117417 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.19585e-08 ( -1.16559e-08  1.1694e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.104 sec. to    1.104 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.629935     ( -0.547615   1.02222 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 3.36287E-03    ( -0.00122972   0.0106336 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          44.62 using 59 PHA bins.
# Reduced chi-squared =         0.7968 for     56 degrees of freedom 
# Null hypothesis probability =   8.630138e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.386741 ( -0.115143  0.117292 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.19276e-08 ( 0  0 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 19.0 sec.
Hardness ratio (energy fluence ratio) = 1.68892368549

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

S(15-50 keV)  = 7.386011e-08
S(50-150 keV) = 1.6002681e-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 = -2.232284873169235E-01, IMY = 2.549541479013678E-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:
-299.896000 -0.896000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
288.7957  10.9740    1.1  39.1  -44.0   3.7490  10.7    1.7	GRS 1915+105                  
299.5835  35.2031    0.2  31.7    0.2  13.3176  56.1    0.3	Cyg X-1                       
308.1185  40.9485    1.4  29.9   17.2   1.8069   8.3    0.4	Cyg X-3                       
326.1898  38.3277    4.5  21.6   44.0   0.5383   2.5    0.9	Cyg X-2                       
  1.7150  18.5198    2.2  31.5  131.3   1.6682   5.4 ------	UNKNOWN                       
345.4014  19.3923    2.9  16.1  127.8   0.8153   4.0 ------	UNKNOWN                       
288.2746  39.9964    2.4  41.8    1.2   1.5316   4.8 ------	UNKNOWN                       
359.3392 -13.0381    2.7  42.6 -177.9   1.3754   4.2 ------	UNKNOWN                       
333.7745  -0.9167    2.4  18.5 -147.0   0.9223   4.8 ------	UNKNOWN                       
344.6352 -18.6544    2.6  38.9 -155.2   1.3991   4.4 ------	UNKNOWN                       
  4.2901 -31.1482    3.0  59.0 -166.2   6.8941   3.8 ------	UNKNOWN                       

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

Time interval of the image:
-0.896000 22.104000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
288.8473  10.7383   17.1  39.1  -44.4   0.0503   0.7   12.8	GRS 1915+105                  
299.4214  35.1297    6.0  31.8    0.0   0.0963   1.9    9.3	Cyg X-1                       
308.2726  40.9512   18.1  29.8   17.3  -0.0336  -0.6    7.4	Cyg X-3                       
325.9448  38.3394    5.6  21.6   43.5  -0.0979  -2.0   10.7	Cyg X-2                       
355.3316 -20.9543    2.5  46.0 -166.3   0.3642   4.6 ------	UNKNOWN                       
328.8412  -1.8360    1.5  18.7 -131.2   0.3379   7.5 ------	UNKNOWN                       
325.5025 -21.9398    2.3  38.9 -126.0   0.3949   5.1 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image: