Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sun Oct  5 00:25:33 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger590446
======================================================================

  Trigger: 00590446      Segment: 000

  BAT Trigger Time: 415724432.384   [s; MET]
      Trigger Stop: 415724433.408   [s; MET]
               UTC: 2014-03-05T15:00:20.662000    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 344.533063618552   Dec: 15.4414554624558  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.27
     Image Trigger?:     NO
     Rate S/N Ratio:     11.7046999107196  [ if not an image trigger ]
     Image S/N Ratio:    7.27

  Analysis Position:   [ source = BAT ]
    RA: 344.533063618552   Dec: 15.4414554624558  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 344.49879587565   Dec: 15.4522071964331  [deg; J2000]  
        { 22h 57m 59.7s , +15d 27' 07.9" }
         +/- 1.79860362375683 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.647633472702013 [arcmin] (formal 1-sigma fit error)
    SNR: 13.1499729623834
 
  Angular difference between the analysis and refined position is 2.084148 arcmin
 
  Partial Coding Fraction: 0.4804688    [ including projection effects ]

  Duration
     T90: 20.3039999604225 +/- 5.35415206616563
        Measured from: -0.240000009536743
                   to: 20.0639999508858     [s; relative to TRIGTIME]
     T50: 8.1839998960495 +/- 4.24473365619141
        Measured from: 1.27600002288818
                   to: 9.45999991893768     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.180000007152557     
                   to: 1.18000000715256     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.1240000128746     
                   to: 22.7639999985695     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.217907   0.357326   0.259388   0.038439
           0.034140   0.035274   0.030609   0.025751 [error]
 Peak      0.024781   0.059886   0.034118   0.007670
           0.007339   0.007773   0.007347   0.005469 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   23.888   -1.124   22.764
T90    20.304   -0.240   20.064
T50     8.184    1.276    9.460
Peak    1.000    0.180    1.180
 
 
====== 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      -1.446    -0.190      0.189       -           -               -         2.46e-03     -2.85e-04          2.84e-04      71.590   57
CPL     -0.301    -0.874      1.107       75.037     -16.270        76.567      9.13e-03     -5.70e-03          2.21e-02      66.330   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      -1.492     -0.276     0.269       -           -               -         7.94e-03     -1.52e-03          1.51e-03      68.640   57
CPL      1.155     -1.566     2.565       51.437     -10.499        18.796      2.39e-01     -2.39e-01          8.20e+00      58.390   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   7.14e-08  1.36e-07  1.99e-07  6.26e-07  5.64e-07  1.03e-06   erg/cm2
      90%_error_low -1.33e-08 -1.64e-08 -2.90e-08 -1.73e-07 -7.11e-08 -1.99e-07   erg/cm2
      90%_error_hi   1.40e-08  1.62e-08  2.89e-08  2.11e-07  7.18e-08  2.31e-07   erg/cm2
Peak flux       PL   3.24e-01  3.28e-01  2.33e-01  2.64e-01  9.89e-01  1.15e+00   ph/cm2/s
      90%_error_low -8.63e-02 -6.23e-02 -5.37e-02 -9.97e-02 -1.83e-01 -2.16e-01   ph/cm2/s
      90%_error_hi   9.18e-02  6.20e-02  5.39e-02  1.29e-01  1.83e-01  2.19e-01   ph/cm2/s
 
Fluence        CPL   5.82e-08  1.51e-07  2.13e-07  1.66e-07  5.23e-07  5.88e-07   erg/cm2
      90%_error_low -1.65e-08 -2.05e-08 -3.37e-08 -9.83e-08 -7.65e-08 -1.23e-07   erg/cm2
      90%_error_hi   1.70e-08  2.14e-08  3.42e-08  2.65e-07  7.82e-08  2.64e-07   erg/cm2
Peak flux      CPL   2.44e-01  4.39e-01  2.32e-01  2.18e-02  9.35e-01  9.37e-01   ph/cm2/s
      90%_error_low -9.35e-02 -9.14e-02 -9.47e-02 -2.18e-02 -1.79e-01 -1.80e-01   ph/cm2/s
      90%_error_hi   1.02e-01  9.92e-02  7.80e-02  6.87e-02  1.82e-01  1.86e-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
  344.4988    15.4522   0.0147    27.6869   -84.1181         1.0316665     13.150 TRIG_00590446                 
 
Foreground time interval of the image:
 -1.124  22.764 (delta_t =  23.888 [sec])
Background time interval of the image:
-71.083  -1.124 (delta_t =  69.959 [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   -1.124 sec. to   22.764 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.44586     ( -0.189966   0.18863 )
Norm@50keV  : 2.46282E-03    ( -0.000285215   0.000284238 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          71.59 using 59 PHA bins.
# Reduced chi-squared =          1.256 for     57 degrees of freedom 
# Null hypothesis probability =   9.242037e-02
 
Photon flux (15-150 keV)    in 23.89 sec: 0.303204 ( -0.035178  0.035242 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.63529e-07 ( -7.11088e-08  7.18107e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -1.124 sec. to   22.764 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.301199     ( -0.874223   1.10673 )
Epeak [keV] : 75.0365      ( -16.2701 76.5665 )
Norm@50keV  : 9.13478E-03    ( -0.00569967   0.0221184 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.33 using 59 PHA bins.
# Reduced chi-squared =          1.184 for     56 degrees of freedom 
# Null hypothesis probability =   1.625325e-01
 
Photon flux (15-150 keV)    in 23.89 sec: 0.289088 ( -0.037138  0.036933 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.22825e-07 ( -7.64748e-08  7.81769e-08 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    0.180 sec. to    1.180 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.4921     ( -0.275046   0.269605 )
Norm@50keV  : 7.94052E-03    ( -0.00152389   0.0015131 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.64 using 59 PHA bins.
# Reduced chi-squared =          1.204 for     57 degrees of freedom 
# Null hypothesis probability =   1.389875e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.989255 ( -0.182617  0.182805 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.54241e-08 ( -1.55016e-08  1.58085e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    0.180 sec. to    1.180 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.15513     ( -1.58703   2.54375 )
Epeak [keV] : 51.4368      ( -10.1856 19.1086 )
Norm@50keV  : 0.239296    ( -0.256764   8.1863 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.39 using 59 PHA bins.
# Reduced chi-squared =          1.043 for     56 degrees of freedom 
# Null hypothesis probability =   3.877866e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.935226 ( -0.178734  0.182104 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.14823e-08 ( -1.47432e-08  1.68048e-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 = 5.377245253927346E-02, IMY = 5.219584705870727E-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:
-71.083400 -1.124000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5993  35.2076    1.8  47.3  -13.1   0.8792   6.3    0.6	Cyg X-1                       
308.0818  40.9766    2.0  39.1   -8.5   0.5964   5.7    1.9	Cyg X-3                       
326.2078  38.2859    7.6  26.2  -19.8   0.1238   1.5    2.7	Cyg X-2                       
 57.7432  21.8669    3.3  51.7  154.2   1.4029   3.6 ------	UNKNOWN                       
333.1098  54.5968    3.5  23.5   20.9   0.2708   3.3 ------	UNKNOWN                       
292.5864  45.0099    2.2  48.7    1.8   0.8992   5.2 ------	UNKNOWN

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

    Time interval of the image:
-1.124000 22.764000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.6969  35.3148    8.7  47.2  -13.0  -0.1251  -1.3    8.6	Cyg X-1                       
308.1107  41.0703   13.4  39.0   -8.4  -0.0609  -0.9    7.1	Cyg X-3                       
326.3348  38.2543    6.2  26.1  -19.9  -0.0972  -1.9    8.7	Cyg X-2                       
344.4988  15.4522    0.9  27.7  -84.1   1.0317  13.2 ------	UNKNOWN                       
 11.3056  -2.5821    2.1  43.4 -134.4   0.6537   5.4 ------	UNKNOWN                       
323.8006   9.4264    2.1  44.1  -61.0   1.1995   5.4 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
708.016580 962.620200
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 83.6381  22.0255    0.3  30.8  -97.1  10.7544  34.6    0.7	Crab                          
133.4505 -16.7993    2.6  40.3  137.9   1.9672   4.4 ------	UNKNOWN