Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Mon Jan 13 03:09:48 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger528195
======================================================================

  Trigger: 00528195      Segment: 000

  BAT Trigger Time: 364654416   [s; MET]
      Trigger Stop: 364654480   [s; MET]
               UTC: 2012-07-22T12:53:26.546400    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 230.491264214896   Dec: 13.2503098737037  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.9
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.9

  Analysis Position:   [ source = BAT ]
    RA: 230.491264214896   Dec: 13.2503098737037  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 230.491   Dec: 13.2503  [deg; J2000]
        { 15h 21m 57.8s , +13d 15' 01.1" }
        +/- 2.29963887776 [arcmin] (estimated 90% radius based on SNR)
    SNR: 9.25802961972
 
 
  Angular difference between the analysis and refined position is 0.015442 arcmin
 
  Partial Coding Fraction: 0.1582031    [ including projection effects ]

  Duration
     T90: 36.3200000524521 +/- 6.44498194241476
        Measured from: -4.12000000476837
                   to: 32.2000000476837     [s; relative to TRIGTIME]
     T50: 19.6320000290871 +/- 3.97602412695827
        Measured from: 5
                   to: 24.6320000290871     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 4.23600000143051     
                   to: 5.23600000143051     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -7.80000001192093     
                   to: 35.1439999938011     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.883401   0.690485   0.505828   0.173095
           0.087672   0.090549   0.080670   0.073061 [error]
 Peak      0.043858   0.040929   0.025264   0.031185
           0.013526   0.014024   0.012456   0.011112 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   42.944   -7.800   35.144
T90    36.320   -4.120   32.200
T50    19.632    5.000   24.632
Peak    1.000    4.236    5.236
 
 
====== 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      -2.009    -0.259      0.240       -           -               -         3.35e-03     -5.15e-04          4.94e-04      40.250   57
CPL     -2.294    -0.656      0.581      118.698      N/A           N/A         2.35e-03        N/A               N/A         39.300   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      -1.505     -0.714     0.760       -           -               -         7.98e-03     -2.90e-03          2.85e-03      54.320   57
CPL     -1.530     -5.521     1.428     9999.330      N/A           N/A         7.99e-03        N/A               N/A         54.330   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   2.97e-07  4.01e-07  3.99e-07  7.14e-07  1.33e-06  1.81e-06   erg/cm2
      90%_error_low -5.46e-08 -4.83e-08 -8.44e-08 -2.68e-07 -1.87e-07 -3.62e-07   erg/cm2
      90%_error_hi   5.70e-08  4.82e-08  8.46e-08  3.54e-07  1.90e-07  4.24e-07   erg/cm2
Peak flux       PL   3.30e-01  3.31e-01  2.33e-01  2.61e-01  9.98e-01  1.16e+00   ph/cm2/s
      90%_error_low -2.07e-01 -1.46e-01 -1.06e-01 -1.82e-01 -3.81e-01 -4.11e-01   ph/cm2/s
      90%_error_hi   2.48e-01  1.32e-01  9.99e-02  3.54e-01  3.82e-01  4.11e-01   ph/cm2/s
 
Fluence        CPL   2.85e-07  3.24e-07  3.51e-07  8.13e-07  1.24e-06  1.90e-06   erg/cm2
      90%_error_low -7.11e-08 -1.63e-07 -3.10e-07    N/A    -2.80e-07 -1.64e-06   erg/cm2
      90%_error_hi   6.47e-08  1.14e-07  9.36e-08    N/A     2.74e-07  3.09e-07   erg/cm2
Peak flux      CPL   3.48e-01  3.31e-01  2.29e-01  2.95e-01  1.02e+00  1.15e+00   ph/cm2/s
      90%_error_low -2.28e-01 -1.47e-01     N/A       N/A   -4.02e-01 -4.33e-01   ph/cm2/s
      90%_error_hi   1.86e-01  1.34e-01     N/A       N/A    3.63e-01  4.12e-01   ph/cm2/s
 
======================================================================
  • Special notes of this burst




    Image

    Pre-slew 15.0-50.0 keV image (Event data)

    #RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
230.491 13.250 0.000 47.016 155.203 1.652 9.258 TRIG_00528195
 
Image time interval: 0.000 to 64.000 [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

    Bokeh Plot

    Other quick-look light curves:




    Spectra

    Notes:

    Time averaged spectrum fit using the average DRM

    Power-law model
    Time interval is from   -7.800 sec. to   35.144 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.00898     ( -0.258909   0.239745 )
Norm@50keV  : 3.35418E-03    ( -0.000515407   0.000494111 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          40.25 using 59 PHA bins.
# Reduced chi-squared =         0.7061 for     57 degrees of freedom 
# Null hypothesis probability =   9.546918e-01
 
Photon flux (15-150 keV)    in 42.94 sec: 0.505254 ( -0.061876  0.062057 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.32908e-06 ( -1.87251e-07  1.90247e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -7.800 sec. to   35.144 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.66436     ( -0.284827   0.952464 )
Epeak [keV] : 228.947      (   )
Norm@50keV  : 1.60888E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.76 using 59 PHA bins.
# Reduced chi-squared =         0.6921 for     56 degrees of freedom 
# Null hypothesis probability =   9.616575e-01
 
Photon flux (15-150 keV)    in 42.94 sec: 0.481738 ( -0.186151  0.072078 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.23729e-06 ( -2.8007e-07  2.73875e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    4.236 sec. to    5.236 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.50522     ( -0.713808   0.75956 )
Norm@50keV  : 7.98326E-03    ( -0.0028958   0.00284587 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.32 using 59 PHA bins.
# Reduced chi-squared =         0.9530 for     57 degrees of freedom 
# Null hypothesis probability =   5.761936e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.998059 ( -0.380528  0.382001 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.56781e-08 ( -2.89024e-08  2.92616e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    4.236 sec. to    5.236 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.30958     ( -4.74088   2.20774 )
Epeak [keV] : 112.939      (   )
Norm@50keV  : 2.89579E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.30 using 59 PHA bins.
# Reduced chi-squared =         0.9696 for     56 degrees of freedom 
# Null hypothesis probability =   5.395573e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.02016 ( -0.402348  0.36275 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.3457e-08 ( -4.34556e-08  4.08357e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 36.32 sec.
Hardness ratio (energy fluence ratio) = 0.993825043053

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

    S(15-50 keV)  = 6.983934e-07
S(50-150 keV) = 6.30699e-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 = -0.974054834462, IMY = -0.450006032769

    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:
-12.099400 -7.800000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4543  35.3811    9.8  22.3  120.1   0.0254   1.2    2.3	Her X-1                       
299.5059  35.2947   16.6  38.9   50.8   0.0283   0.7    7.0	Cyg X-1                       
308.2205  40.9608    4.3  39.3   36.7   0.0913   2.7    5.0	Cyg X-3                       
326.1331  38.2187   14.8  50.8   25.3  -0.0598  -0.8    6.4	Cyg X-2                       
 20.3265  56.6760    2.2  58.7  -22.9   0.5727   5.3 ------	UNKNOWN                       
177.8232  40.8192    2.3  48.1 -129.8   0.4058   5.1 ------	UNKNOWN                       
158.5152  65.7558    2.3  40.6  -91.9   0.3656   5.1 ------	UNKNOWN                       
 73.1842  75.4728    2.6  47.0  -53.5   0.3455   4.4 ------	UNKNOWN

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

    Time interval of the image:
-7.800000 35.144000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3855  35.3453    8.3  22.3  120.3  -0.3121  -1.4    3.5	Her X-1                       
299.5474  35.1352   19.6  39.0   51.0   0.2560   0.6    4.5	Cyg X-1                       
308.3102  41.0797    6.9  39.3   36.5  -0.6124  -1.7   11.8	Cyg X-3                       
326.1927  38.3090   19.5  50.8   25.2   0.4715   0.6    1.2	Cyg X-2                       
230.4840  13.2394    2.0  47.0  155.2   3.3652   5.9 ------	UNKNOWN                       
253.7372  58.5891    2.1   1.7   -0.8   0.9972   5.6 ------	UNKNOWN                       
 53.5594  75.5836    1.9  46.4  -46.9   3.4453   6.2 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
137.100600 963.039500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9792 -15.6443    0.2  32.3  129.1  78.1490  63.9    0.2	Sco X-1                       
254.4623  35.3413  821.4  30.9   16.2  -0.0114  -0.0    0.2	Her X-1                       
222.1860 -31.5662    2.9  45.5  165.9   7.1824   4.0 ------	UNKNOWN                       
256.5198  61.4266    3.5  51.7   -8.6   5.2461   3.4 ------	UNKNOWN                       
220.6400  25.0616    3.0  15.0  -60.8   2.4585   3.8 ------	UNKNOWN                       
229.5313  72.1948    3.7  58.9  -24.4  12.8713   3.1 ------	UNKNOWN                       
184.6086  -1.9002    3.4  48.0 -129.0   9.7815   3.4 ------	UNKNOWN