GRB060204B

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 18:39:28 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger180241
======================================================================

  Trigger: 00180241      Segment: 000

  BAT Trigger Time: 160756465.088   [s; MET]
      Trigger Stop: 160756467.136   [s; MET]
               UTC: 2006-02-04T14:34:24.092080    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 211.794850072626   Dec: 27.6832125602182  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.49
     Image Trigger?:     NO
     Rate S/N Ratio:     13.490737563232  [ if not an image trigger ]
     Image S/N Ratio:    8.49

  Analysis Position:   [ source = BAT ]
    RA: 211.794850072626   Dec: 27.6832125602182  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 211.803717079679   Dec: 27.6734212205552  [deg; J2000]  
        { 14h 07m 12.9s , +27d 40' 24.3" }
         +/- 0.803622430507524 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.30183253950445 [arcmin] (formal 1-sigma fit error)
    SNR: 41.5679214123898
 
  Angular difference between the analysis and refined position is 0.753065 arcmin
 
  Partial Coding Fraction: 0.7734375    [ including projection effects ]

  Duration
     T90: 139.463999986649 +/- 31.4574631730999
        Measured from: -19.4639999866486
                   to: 120     [s; relative to TRIGTIME]
     T50: 29.9160000085831 +/- 10.2365759812578
        Measured from: -7.33599999547005
                   to: 22.580000013113     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 5.04399999976158     
                   to: 6.04399999976158     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -24.2759999930859     
                   to: 170.715999990702     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.148895   1.780605   1.394848   0.413479
           0.067731   0.071677   0.064904   0.058912 [error]
 Peak      0.038500   0.064599   0.046082   0.015152
           0.005522   0.006412   0.005897   0.004978 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  194.992  -24.276  170.716
T90   139.464  -19.464  120.000
T50    29.916   -7.336   22.580
Peak    1.000    5.044    6.044
 
 
====== 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      -1.416    -0.082      0.082       -           -               -         1.64e-03     -7.64e-05          7.63e-05      71.150   57
CPL     -0.785    -0.358      0.391       98.492     -19.971        60.985      3.35e-03     -1.09e-03          1.81e-03      61.550   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      -1.451     -0.189     0.186       -           -               -         1.08e-02     -1.29e-03          1.28e-03      61.550   57
CPL     -0.224     -0.917     1.169       67.862     -14.683        63.929      4.83e-02     -4.83e-02          1.52e-01      56.040   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   3.78e-07  7.31e-07  1.10e-06  3.55e-06  3.08e-06  5.75e-06   erg/cm2
      90%_error_low -3.14e-08 -3.69e-08 -6.44e-08 -4.38e-07 -1.58e-07 -4.85e-07   erg/cm2
      90%_error_hi   3.23e-08  3.68e-08  6.43e-08  4.78e-07  1.58e-07  5.19e-07   erg/cm2
Peak flux       PL   4.23e-01  4.38e-01  3.21e-01  3.77e-01  1.33e+00  1.56e+00   ph/cm2/s
      90%_error_low -7.60e-02 -5.24e-02 -4.79e-02 -1.01e-01 -1.53e-01 -1.86e-01   ph/cm2/s
      90%_error_hi   7.94e-02  5.21e-02  4.76e-02  1.21e-01  1.53e-01  1.88e-01   ph/cm2/s
 
Fluence        CPL   3.35e-07  7.72e-07  1.14e-06  1.52e-06  2.93e-06  3.76e-06   erg/cm2
      90%_error_low -3.86e-08 -4.41e-08 -7.13e-08 -5.22e-07 -1.80e-07 -5.46e-07   erg/cm2
      90%_error_hi   3.95e-08  4.48e-08  7.21e-08  8.67e-07  1.80e-07  8.68e-07   erg/cm2
Peak flux      CPL   3.55e-01  4.98e-01  3.40e-01  1.08e-01  1.27e+00  1.30e+00   ph/cm2/s
      90%_error_low -9.11e-02 -6.97e-02 -5.73e-02 -6.75e-02 -1.59e-01 -1.74e-01   ph/cm2/s
      90%_error_hi   9.36e-02  7.32e-02  5.68e-02  1.56e-01  1.58e-01  2.02e-01   ph/cm2/s
 
======================================================================

Special notes of this burst

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  211.8037    27.6734   0.0046    30.9830   -27.4270         3.7055143     41.568 TRIG_00180241                 
 
Foreground time interval of the image:
-24.276  23.613 (delta_t =  47.889 [sec])
Background time interval of the image:
-299.088 -24.276 (delta_t = 274.812 [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  -24.276 sec. to  170.716 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.41628     ( -0.0821192   0.0820848 )
Norm@50keV  : 1.64182E-03    ( -7.63916e-05   7.63351e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.15 using 59 PHA bins.
# Reduced chi-squared =          1.248 for     57 degrees of freedom 
# Null hypothesis probability =   9.850769e-02
 
Photon flux (15-150 keV)    in 195 sec: 0.200698 ( -0.009613  0.009628 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.08379e-06 ( -1.57517e-07  1.58298e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from  -24.276 sec. to  170.716 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.785261     ( -0.358078   0.391159 )
Epeak [keV] : 98.4923      ( -19.9707 60.9847 )
Norm@50keV  : 3.34808E-03    ( -0.00109232   0.00181134 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.55 using 59 PHA bins.
# Reduced chi-squared =          1.099 for     56 degrees of freedom 
# Null hypothesis probability =   2.840517e-01
 
Photon flux (15-150 keV)    in 195 sec: 0.193890 ( -0.010318  0.010318 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.93186e-06 ( -1.80205e-07  1.801e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    5.044 sec. to    6.044 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.45085     ( -0.189135   0.185929 )
Norm@50keV  : 1.07697E-02    ( -0.00129208   0.00128259 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.55 using 59 PHA bins.
# Reduced chi-squared =          1.080 for     57 degrees of freedom 
# Null hypothesis probability =   3.164019e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.32753 ( -0.15264  0.15268 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.03058e-07 ( -1.36472e-08  1.383e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    5.044 sec. to    6.044 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.224184     ( -0.916999   1.16901 )
Epeak [keV] : 67.8616      ( -14.682 63.9305 )
Norm@50keV  : 4.83338E-02    ( -0.0483379   0.152495 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.04 using 59 PHA bins.
# Reduced chi-squared =          1.001 for     56 degrees of freedom 
# Null hypothesis probability =   4.733908e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.27404 ( -0.15859  0.15825 ) ph/cm2/s
Energy fluence (15-150 keV)             : 9.2933e-08 ( -1.50218e-08  1.57221e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 139.464 sec.
Hardness ratio (energy fluence ratio) = 1.47339720018

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

S(15-50 keV)  = 1.1065801e-06
S(50-150 keV) = 1.8252846e-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 = 5.329645474828859E-01, IMY = 2.765809152646098E-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:
-299.088000 -24.276000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
185.7949  10.2845    2.3  35.6   28.2   1.2510   4.9 ------	UNKNOWN                       
233.2798  24.8777    3.1  47.3  -44.5   2.5051   3.8 ------	UNKNOWN

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

Time interval of the image:
-24.276000 23.612600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
190.6266  40.4964    2.5   9.4  -23.1   0.3108   4.6 ------	UNKNOWN                       
211.8037  27.6734    0.3  31.0  -27.4   3.7054  41.6 ------	UNKNOWN                       
225.9102  41.8972    2.4  33.1  -62.1   0.5695   4.8 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
82.612590 303.002700
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4246  35.3439   12.8  36.9 -120.3   0.2530   0.9    1.6	Her X-1                       
186.1506  29.3408    2.3  22.5   93.0   0.9344   5.0 ------	UNKNOWN                       
238.1830  55.5194    2.6  33.7 -160.4   0.7367   4.4 ------	UNKNOWN

Analysis Summary

Notes:

Image

Pre-slew 15.0-350.0 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