Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Sat Oct  4 22:21:56 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger601259
======================================================================

  Trigger: 00601259      Segment: 000

  BAT Trigger Time: 424110701.568   [s; MET]
      Trigger Stop: 424110705.664   [s; MET]
               UTC: 2014-06-10T16:31:29.445940    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 286.259880826746   Dec: 3.90684619347918  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    14.55
     Image Trigger?:     NO
     Rate S/N Ratio:     14.9666295470958  [ if not an image trigger ]
     Image S/N Ratio:    14.55

  Analysis Position:   [ source = BAT ]
    RA: 286.259880826746   Dec: 3.90684619347918  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 286.261307212317   Dec: 3.898241674498  [deg; J2000]  
        { 19h 05m 02.7s , +03d 53' 53.7" }
         +/- 0.733213517878836 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.212550705074334 [arcmin] (formal 1-sigma fit error)
    SNR: 47.3855896998182
 
  Angular difference between the analysis and refined position is 0.523284 arcmin
 
  Partial Coding Fraction: 0.6796875    [ including projection effects ]

  Duration
     T90: 93.2519999742508 +/- 3.35232104501482
        Measured from: -1.6360000371933
                   to: 91.6159999370575     [s; relative to TRIGTIME]
     T50: 54.8679999709129 +/- 2.05959219221797
        Measured from: 13.4639999866486
                   to: 68.3319999575615     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.451999962329865     
                   to: 1.45199996232986     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -6.66800004243851     
                   to: 105.708000004292     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.693323   3.763624   2.593245   0.608501
           0.086665   0.086779   0.072631   0.059164 [error]
 Peak      0.041145   0.059264   0.052787   0.019348
           0.008348   0.008431   0.007104   0.005475 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  112.376   -6.668  105.708
T90    93.252   -1.636   91.616
T50    54.868   13.464   68.332
Peak    1.000    0.452    1.452
 
 
====== 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      -1.572    -0.055      0.055       -           -               -         5.61e-03     -1.63e-04          1.63e-04      41.980   57
CPL     -1.347    -0.212      0.224      152.917     -50.976      1210.033      7.18e-03     -1.45e-03          1.93e-03      38.700   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      -1.361     -0.239     0.241       -           -               -         1.14e-02     -1.56e-03          1.55e-03      54.350   57
CPL     -1.220     -1.008     1.092      288.229    -288.229      -288.229      1.33e-02     -6.48e-03          3.13e-02      54.290   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   8.61e-07  1.51e-06  2.04e-06  5.64e-06  5.92e-06  1.01e-05   erg/cm2
      90%_error_low -4.85e-08 -4.98e-08 -7.52e-08 -4.58e-07 -1.82e-07 -5.03e-07   erg/cm2
      90%_error_hi   4.96e-08  4.97e-08  7.51e-08  4.86e-07  1.82e-07  5.25e-07   erg/cm2
Peak flux       PL   4.09e-01  4.47e-01  3.48e-01  4.46e-01  1.37e+00  1.65e+00   ph/cm2/s
      90%_error_low -9.98e-02 -6.97e-02 -5.78e-02 -1.37e-01 -1.93e-01 -2.30e-01   ph/cm2/s
      90%_error_hi   1.07e-01  6.84e-02  5.69e-02  1.72e-01  1.94e-01  2.32e-01   ph/cm2/s
 
Fluence        CPL   8.20e-07  1.54e-06  2.07e-06  4.10e-06  5.82e-06  8.53e-06   erg/cm2
      90%_error_low -6.09e-08 -5.49e-08 -8.13e-08 -1.02e-06 -2.06e-07 -1.04e-06   erg/cm2
      90%_error_hi   6.20e-08  5.54e-08  8.19e-08  1.43e-06  2.05e-07  1.43e-06   erg/cm2
Peak flux      CPL   3.98e-01  4.53e-01  3.53e-01  3.77e-01  1.36e+00  1.58e+00   ph/cm2/s
      90%_error_low -1.22e-01 -7.44e-02 -6.18e-02 -3.77e-01 -2.01e-01 -3.38e-01   ph/cm2/s
      90%_error_hi   1.03e-01  8.15e-02  6.70e-02  1.50e-01  1.94e-01  2.96e-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
  286.2613     3.8982   0.0040    19.6060    98.8981         8.4291169     47.386 TRIG_00601259                 
 
Foreground time interval of the image:
 -6.668  80.133 (delta_t =  86.801 [sec])
Background time interval of the image:
-239.568  -6.668 (delta_t = 232.900 [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   -6.668 sec. to  105.708 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.57164     ( -0.0551292   0.0551148 )
Norm@50keV  : 5.61037E-03    ( -0.000163483   0.00016344 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.98 using 59 PHA bins.
# Reduced chi-squared =         0.7365 for     57 degrees of freedom 
# Null hypothesis probability =   9.318548e-01
 
Photon flux (15-150 keV)    in 112.4 sec: 0.714791 ( -0.022896  0.022968 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.91966e-06 ( -1.81582e-07  1.81978e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -6.668 sec. to  105.708 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.34655     ( -0.212427   0.223677 )
Epeak [keV] : 152.917      ( -50.9763 1210.03 )
Norm@50keV  : 7.17862E-03    ( -0.0014515   0.00193368 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          38.70 using 59 PHA bins.
# Reduced chi-squared =         0.6911 for     56 degrees of freedom 
# Null hypothesis probability =   9.621912e-01
 
Photon flux (15-150 keV)    in 112.4 sec: 0.703194 ( -0.025175  0.025257 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.81709e-06 ( -2.06145e-07  2.05262e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    0.452 sec. to    1.452 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.3607     ( -0.238919   0.24083 )
Norm@50keV  : 1.13530E-02    ( -0.00155638   0.00155407 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.35 using 59 PHA bins.
# Reduced chi-squared =         0.9535 for     57 degrees of freedom 
# Null hypothesis probability =   5.750773e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.37078 ( -0.19314  0.19381 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.10632e-07 ( -1.66553e-08  1.68092e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    0.452 sec. to    1.452 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.22049     ( -1.00763   1.09236 )
Epeak [keV] : 288.229      ( -288.461 -288.461 )
Norm@50keV  : 1.33195E-02    ( -0.00647599   0.0313104 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.29 using 59 PHA bins.
# Reduced chi-squared =         0.9694 for     56 degrees of freedom 
# Null hypothesis probability =   5.400198e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.36305 ( -0.20057  0.19368 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.09582e-07 ( -1.83725e-08  1.76013e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 93.252 sec.
Hardness ratio (energy fluence ratio) = 1.34573581797

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

    S(15-50 keV)  = 2.3760284e-06
S(50-150 keV) = 3.543664e-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 = -5.509643130575773E-02, IMY = -3.519150614601779E-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:
-239.568000 -6.668000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4422  35.3122    3.1  45.2  172.5   1.8697   3.8    2.0	Her X-1                       
268.5133  -1.4530    5.8  37.1  112.6   1.2532   2.0    8.7	SW J1753.5-0127               
288.7846  10.9476    0.5  13.4  113.9   4.8847  22.3    0.8	GRS 1915+105                  
299.5841  35.1925    0.3  18.2 -134.7   7.9308  33.6    0.6	Cyg X-1                       
308.0295  41.0247    2.4  24.7 -118.1   1.2852   4.7    5.7	Cyg X-3                       
326.0985  38.1495   20.3  30.4  -89.7   0.2156   0.6   10.9	Cyg X-2                       
278.7557  31.9587    3.0  25.1  179.9   0.8886   3.9 ------	UNKNOWN                       
239.6087  46.8764    2.9  58.3 -175.6   5.8618   4.0 ------	UNKNOWN                       
257.4068  66.4393    2.6  57.0 -149.9   7.7890   4.5 ------	UNKNOWN                       
313.6099  60.9798    2.5  44.8 -122.1   4.6116   4.6 ------	UNKNOWN

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

    Time interval of the image:
-6.668000 80.132600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5110  35.2098    5.6  45.1  172.4  -0.5985  -2.1    8.4	Her X-1                       
268.2628  -1.3859    5.3  37.2  112.9   0.8676   2.2    7.5	SW J1753.5-0127               
288.7805  10.8548  599.0  13.5  113.6  -0.0030  -0.0    5.5	GRS 1915+105                  
299.8493  35.2200    0.0  18.2 -134.0   0.0992   0.7   12.7	Cyg X-1                       
308.1072  40.9564   46.2  24.7 -117.9  -0.0421  -0.2    0.3	Cyg X-3                       
326.3219  38.2492   13.4  30.6  -89.6   0.1964   0.9    8.3	Cyg X-2                       
303.3699 -10.7029    2.8  27.8   44.5   0.7966   4.1 ------	UNKNOWN                       
286.2613   3.8982    0.2  19.6   98.9   8.4294  47.4 ------	UNKNOWN                       
312.3193  60.4282    2.2  44.1 -122.8   2.7964   5.3 ------	UNKNOWN                       
329.6114  52.2549    2.6  41.8 -104.7   2.6299   4.5 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
197.532640 962.512000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
355.2773  30.2835    3.0  29.4  140.0   2.2768   3.8 ------	UNKNOWN                       
 22.3500   6.6407    3.4  13.8   38.2   1.4636   3.4 ------	UNKNOWN                       
 49.6352 -11.0558    2.4  38.9  -15.7   2.7002   4.9 ------	UNKNOWN                       
 36.3600  29.6926    3.0  13.6 -114.2   1.7521   3.8 ------	UNKNOWN                       
 14.5686  78.4593    5.1  58.7 -159.2   9.8118   2.3 ------	UNKNOWN