Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Fri Jan 17 15:04:04 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger440606
======================================================================

  Trigger: 00440606      Segment: 000

  BAT Trigger Time: 314418696.236   [s; MET]
      Trigger Stop: 314418696.3   [s; MET]
               UTC: 2010-12-19T02:31:29.757600    [includes UTCF correction] 
       Where From?: (*SHORT BURST*) TDRSS scaled map message

  BAT 
    RA: 74.6157044200633   Dec: -2.53400569829485  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.15
     Image Trigger?:     NO
     Rate S/N Ratio:     102.946588093049  [ if not an image trigger ]
     Image S/N Ratio:    11.15

  Analysis Position:   [ source = BAT ]
    RA: 74.6157044200633   Dec: -2.53400569829485  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 74.5870136995784   Dec: -2.52671561369426  [deg; J2000]  
        { 04h 58m 20.9s , -02d 31' 36.2" }
         +/- 0.971724998639332 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.295437047988091 [arcmin] (formal 1-sigma fit error)
    SNR: 31.6893665324003
 
  Angular difference between the analysis and refined position is 1.774518 arcmin
 
  Partial Coding Fraction: 0.9453125    [ including projection effects ]

  Duration
     T90: 0.827999949455261 +/- 0.180399565294848
        Measured from: 0.00400000810623169
                   to: 0.831999957561493     [s; relative to TRIGTIME]
     T50: 0.411999940872192 +/- 0.030463099373373
        Measured from: 0.0799999833106995
                   to: 0.491999924182892     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.015999972820282     
                   to: 0.984000027179718     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.015999972820282     
                   to: 1.10799998044968     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.080413   0.162147   0.208164   0.096495
           0.007451   0.009014   0.009532   0.008416 [error]
 Peak      0.078230   0.154904   0.203117   0.097458
           0.007191   0.008746   0.009356   0.008288 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    1.124   -0.016    1.108
T90     0.828    0.004    0.832
T50     0.412    0.080    0.492
Peak    1.000   -0.016    0.984
 
 
====== 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: 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      -0.625    -0.098      0.101       -           -               -         3.06e-02     -1.71e-03          1.69e-03      65.440   57
CPL     -0.621    -0.095      0.106     9999.340    -9999.340      -9999.340      3.08e-02     -1.60e-03          7.30e-03      65.510   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      -0.603     -0.100     0.102       -           -               -         3.32e-02     -1.88e-03          1.86e-03      67.640   57
CPL     -0.512     -0.192     0.190      997.217    -997.217      -997.217      3.62e-02     -4.51e-03          4.42e-03      68.650   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   1.95e-08  6.15e-08  1.59e-07  1.19e-06  4.34e-07  1.43e-06   erg/cm2
      90%_error_low -2.35e-09 -4.45e-09 -8.71e-09 -1.55e-07 -2.48e-08 -1.58e-07   erg/cm2
      90%_error_hi   2.47e-09  4.40e-09  8.67e-09  1.72e-07  2.49e-08  1.75e-07   erg/cm2
Peak flux       PL   1.20e-04  5.81e-03  2.61e-02  3.98e+00  2.80e-01  3.18e+00   ph/cm2/s
      90%_error_low     N/A   -2.95e-04     N/A       N/A   2.10e-03     N/A     ph/cm2/s
      90%_error_hi      N/A    1.38e-03     N/A       N/A    7.32e-02     N/A     ph/cm2/s
 
Fluence        CPL   1.96e-08  6.14e-08  1.57e-07  1.18e-06  4.36e-07  1.30e-06   erg/cm2
      90%_error_low    N/A    -3.07e-09    N/A    -3.26e-07    N/A    -1.89e-07   erg/cm2
      90%_error_hi     N/A     5.46e-09    N/A     1.77e-07    N/A     2.02e-07   erg/cm2
Peak flux      CPL   5.81e-01  1.01e+00  1.33e+00  3.51e+00  3.87e+00  6.98e+00   ph/cm2/s
      90%_error_low     N/A       N/A       N/A       N/A   -2.04e-01     N/A     ph/cm2/s
      90%_error_hi      N/A       N/A       N/A       N/A    2.04e-01     N/A     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
   74.5870    -2.5267   0.0061    14.3278    32.8673         0.5954407     31.689 TRIG_00440606                 
 
Foreground time interval of the image:
 -0.016   1.108 (delta_t =   1.124 [sec])
Background time interval of the image:
-97.735  -0.016 (delta_t =  97.719 [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:




    Spectra

    Notes:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from   -0.016 sec. to    1.108 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.625101     ( -0.0982707   0.100831 )
Norm@50keV  : 3.05638E-02    ( -0.00170826   0.00169297 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.44 using 59 PHA bins.
# Reduced chi-squared =          1.148 for     57 degrees of freedom 
# Null hypothesis probability =   2.070765e-01
 
Photon flux (15-150 keV)    in 1.124 sec: 9.06882E-02 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.34136e-07 ( -2.48223e-08  2.49207e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.016 sec. to    1.108 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.620753     ( -0.0957439   0.105183 )
Epeak [keV] : 9999.34      ( -9999.36 -9999.36 )
Norm@50keV  : 3.08103E-02    ( -0.00162199   0.00728106 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.51 using 59 PHA bins.
# Reduced chi-squared =          1.170 for     56 degrees of freedom 
# Null hypothesis probability =   1.801315e-01
 
Photon flux (15-150 keV)    in 1.124 sec: 3.55699 ( -0.18622  0.18628 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.36211e-07 ( 0  0 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   -0.016 sec. to    0.984 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.603045     ( -0.0995965   0.102267 )
Norm@50keV  : 3.31863E-02    ( -0.00187942   0.00186145 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.64 using 59 PHA bins.
# Reduced chi-squared =          1.187 for     57 degrees of freedom 
# Null hypothesis probability =   1.581903e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.280324 0.295781 0.256582 0.221264 0.191341 0.166296 0.145553 0.128519 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.23809e-07 ( -2.44716e-08  2.45542e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.016 sec. to    0.984 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.594483     ( -0.191862   0.189822 )
Epeak [keV] : 9998.65      ( -9998.67 -9998.67 )
Norm@50keV  : 3.34608E-02    ( -0.00175575   0.00717119 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.72 using 59 PHA bins.
# Reduced chi-squared =          1.209 for     56 degrees of freedom 
# Null hypothesis probability =   1.355845e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.87200 ( -0.20407  0.20419 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.26265e-07 ( -2.70931e-08  2.19331e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = N/A

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

    S(15-50 keV)  = N/A
S(50-150 keV) = N/A

    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 = 2.145298307916920E-01, IMY = -1.386118796284431E-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:
-97.735400 -0.016000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6292  22.0135    0.8  36.1   70.7   4.3625  14.7    0.2	Crab                          
135.4922 -40.5295    2.3  52.5 -159.3   1.6319   4.9    2.2	Vela X-1                      
 49.5539 -16.8971    2.6  32.5  -29.5   0.5537   4.4 ------	UNKNOWN

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

    Time interval of the image:
-0.016000 1.108000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.5213  21.9142    5.4  36.0   70.5  -0.0922  -2.2    8.7	Crab                          
135.7136 -40.6047    6.2  52.7 -159.2  -0.1006  -1.9    9.0	Vela X-1                      
 75.6639  24.2504    2.3  39.0   59.1   0.2661   5.0 ------	UNKNOWN                       
 74.5870  -2.5267    0.4  14.3   32.9   0.5955  31.7 ------	UNKNOWN                       
 41.8667  -0.0328    2.8  43.2   -4.6   0.1204   4.1 ------	UNKNOWN                       
 25.7403   1.0082    2.0  58.8  -10.0   0.5727   5.6 ------	UNKNOWN                       
118.0326 -47.6781    2.0  44.3 -143.4   0.1945   5.8 ------	UNKNOWN                       
 57.9937 -37.8916    2.4  32.7  -71.5   0.1344   4.7 ------	UNKNOWN                       
114.3862 -51.7391    2.2  45.2 -136.9   0.2088   5.2 ------	UNKNOWN                       
 51.4257 -40.3851    2.4  38.2  -69.6   0.2011   4.9 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
44.264630 941.564590
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6332  22.0176    0.3  26.1   85.6  37.4536  41.1    0.2	Crab                          
122.6020   6.9819    2.5  48.8  144.7  13.0251   4.7 ------	UNKNOWN                       
 79.6160  20.3299    3.0  23.4   78.2   2.9948   3.8 ------	UNKNOWN                       
 30.8312 -22.8492    4.8  47.0  -53.1   8.4787   2.4 ------	UNKNOWN                       
 23.5306 -16.0534    4.1  52.0  -42.2  10.6704   2.8 ------	UNKNOWN