Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Tue Jul  5 22:05:56 EDT 2016
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger690598
======================================================================

  Trigger: 00690598      Segment: 000

  BAT Trigger Time: 487374050.816   [s; MET]
      Trigger Stop: 487374051.84   [s; MET]
               UTC: 2016-06-11T21:40:34.413540    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 164.437689236213   Dec: -70.3948489703434  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.82
     Image Trigger?:     NO
     Rate S/N Ratio:     11.3137084989848  [ if not an image trigger ]
     Image S/N Ratio:    7.82

  Analysis Position:   [ source = BAT ]
    RA: 164.437689236213   Dec: -70.3948489703434  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 164.413991444967   Dec: -70.3978415238082  [deg; J2000]  
        { 10h 57m 39.4s , -70d 23' 52.2" }
         +/- 1.18171277190401 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.506341480195562 [arcmin] (formal 1-sigma fit error)
    SNR: 23.9623777056655
 
  Angular difference between the analysis and refined position is 0.509724 arcmin
 
  Partial Coding Fraction: 0.453125    [ including projection effects ]

  Duration
     T90: 35.12399995327 +/- 6.00160015347611
        Measured from: -25.2680000066757
                   to: 9.85599994659424     [s; relative to TRIGTIME]
     T50: 10.7759999632835 +/- 2.07533320391873
        Measured from: -6.31199997663498
                   to: 4.46399998664856     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 2.6360000371933     
                   to: 3.6360000371933     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -31.3840000033379     
                   to: 13.5120000243187     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.789735   1.046970   0.752096   0.174853
           0.061236   0.062954   0.054750   0.048832 [error]
 Peak      0.072619   0.074341   0.062001   0.014431
           0.009726   0.010406   0.008712   0.007600 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   44.896  -31.384   13.512
T90    35.124  -25.268    9.856
T50    10.776   -6.312    4.464
Peak    1.000    2.636    3.636
 
 
====== 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      -1.676    -0.123      0.121       -           -               -         4.26e-03     -3.00e-04          2.98e-04      54.780   57
CPL     -1.532    -0.253      0.464      160.014      N/A           N/A         5.05e-03        N/A               N/A         54.450   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      -1.710     -0.248     0.239       -           -               -         1.48e-02     -2.15e-03          2.11e-03      77.590   57
CPL     -1.704     -0.462     0.236     9998.880    -9998.870      -9998.880      1.49e-02     -2.18e-03          2.24e-02      77.590   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   2.88e-07  4.76e-07  5.96e-07  1.48e-06  1.78e-06  2.84e-06   erg/cm2
      90%_error_low -3.27e-08 -3.34e-08 -5.53e-08 -2.74e-07 -1.31e-07 -3.22e-07   erg/cm2
      90%_error_hi   3.38e-08  3.33e-08  5.52e-08  3.14e-07  1.32e-07  3.52e-07   erg/cm2
Peak flux       PL   7.48e-01  6.65e-01  4.06e-01  3.76e-01  1.98e+00  2.20e+00   ph/cm2/s
      90%_error_low -1.63e-01 -9.33e-02 -7.58e-02 -1.25e-01 -2.73e-01 -2.94e-01   ph/cm2/s
      90%_error_hi   1.73e-01  9.24e-02  7.44e-02  1.56e-01  2.74e-01  2.95e-01   ph/cm2/s
 
Fluence        CPL   2.82e-07  4.83e-07  6.01e-07  1.18e-06  1.76e-06  2.54e-06   erg/cm2
      90%_error_low -3.81e-08 -3.84e-08 -5.75e-08 -5.64e-07 -1.44e-07 -5.81e-07   erg/cm2
      90%_error_hi   3.45e-08  4.01e-08  5.86e-08  3.80e-07  1.43e-07  4.26e-07   erg/cm2
Peak flux      CPL   7.64e-01  6.61e-01  4.02e-01  3.76e-01  1.99e+00  2.25e+00   ph/cm2/s
      90%_error_low     N/A   -9.23e-02 -2.53e-01     N/A       N/A   -5.20e-01   ph/cm2/s
      90%_error_hi      N/A    9.99e-02  -1.08e-01     N/A       N/A    3.09e-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
  164.4140   -70.3978   0.0080    41.8913  -151.7595         2.9573785     23.962 TRIG_00690598                 
 
Foreground time interval of the image:
-31.384  13.512 (delta_t =  44.896 [sec])
Background time interval of the image:
-239.816 -31.384 (delta_t = 208.432 [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  -31.384 sec. to   13.512 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.67611     ( -0.122542   0.121268 )
Norm@50keV  : 4.26102E-03    ( -0.000300071   0.000298398 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.78 using 59 PHA bins.
# Reduced chi-squared =         0.9611 for     57 degrees of freedom 
# Null hypothesis probability =   5.588192e-01
 
Photon flux (15-150 keV)    in 44.9 sec: 0.561293 ( -0.03941  0.039495 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.7752e-06 ( -1.31029e-07  1.31871e-07 ) ergs/cm2
    Cutoff power-law model
    Time interval is from  -31.384 sec. to   13.512 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.53162     ( -0.253305   0.463946 )
Epeak [keV] : 160.014      (   )
Norm@50keV  : 5.05197E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.45 using 59 PHA bins.
# Reduced chi-squared =         0.9723 for     56 degrees of freedom 
# Null hypothesis probability =   5.337658e-01
 
Photon flux (15-150 keV)    in 44.9 sec: 0.557234 ( -0.041138  0.041169 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.75581e-06 ( -1.43578e-07  1.42545e-07 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from    2.636 sec. to    3.636 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.71022     ( -0.247582   0.239026 )
Norm@50keV  : 1.48442E-02    ( -0.00214954   0.00211034 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.59 using 59 PHA bins.
# Reduced chi-squared =          1.361 for     57 degrees of freedom 
# Null hypothesis probability =   3.621833e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.97865 ( -0.2728  0.27376 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37354e-07 ( -2.05736e-08  2.07417e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from    2.636 sec. to    3.636 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.70423     ( -0.459754   0.238231 )
Epeak [keV] : 9998.88      ( -9999.34 -9999.35 )
Norm@50keV  : 1.48873E-02    ( -0.00216514   0.0224145 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          77.59 using 59 PHA bins.
# Reduced chi-squared =          1.386 for     56 degrees of freedom 
# Null hypothesis probability =   2.964243e-02
 
Photon flux (15-150 keV)    in 1 sec: 1.98946 (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37683e-07 ( -2.13294e-08  1.60616e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 35.124 sec.
Hardness ratio (energy fluence ratio) = 1.25172779363

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

    S(15-50 keV)  = 7.640415e-07
S(50-150 keV) = 1.0111672e-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 = -7.902066006743750E-01, IMY = 4.244252734433310E-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:
-239.816000 -31.384000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.3042 -60.6412    2.2  34.1 -141.4   1.2418   5.2    1.1	Cen X-3                       
186.7334 -62.7786    1.4  30.5 -154.9   1.9076   8.2    2.2	GX 301-2                      
256.1243 -37.7531   15.1  41.8  120.0  -0.6136  -0.8    8.5	4U 1700-377                   
 73.9754 -85.2564    2.8  58.8 -166.2   5.7818   4.1 ------	UNKNOWN                       
165.1521   1.1408    3.2  50.8  -44.4   3.5835   3.6 ------	UNKNOWN

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

    Time interval of the image:
-31.384000 13.512000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.4081 -60.7869   22.9  34.1 -141.7  -0.0527  -0.5   10.2	Cen X-3                       
186.8952 -62.6860    5.9  30.3 -155.0  -0.1787  -2.0    8.3	GX 301-2                      
256.0147 -37.6301    6.0  41.7  119.8   0.6214   1.9   12.9	4U 1700-377                   
201.5895  21.6715    2.7  56.0    6.9   2.0122   4.3 ------	UNKNOWN                       
164.4140 -70.3979    0.5  41.9 -151.8   2.9571  24.0 ------	UNKNOWN                       
149.1060 -49.6403    2.3  42.5 -118.8   1.2355   5.0 ------	UNKNOWN                       
150.7087 -43.3416    2.9  41.7 -109.3   1.1886   3.9 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
239.484600 910.784600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9794 -15.6425    0.4  30.6   59.4  32.7934  31.3    0.1	Sco X-1                       
255.9656 -37.8107    1.9  21.4    5.9   3.6961   6.1    2.2	4U 1700-377                   
256.4512 -36.3809    1.6  20.3    8.9   4.2961   7.2    2.6	GX 349+2                      
262.9967 -24.7382    9.2  11.9   46.0   0.6799   1.3    0.8	GX 1+4                        
264.9173 -44.4285    2.6  21.5  -20.1   2.3689   4.4    7.6	4U 1735-44                    
268.3557  -1.6289    5.5  24.5  118.7  -1.6473  -2.1   10.6	SW J1753.5-0127               
270.3320 -25.0733    1.6   5.2   45.1   4.0634   7.3    2.6	GX 5-1                        
270.2662 -25.7346    3.5   5.3   38.0   1.8815   3.3    2.0	GRS 1758-258                  
274.0379 -14.0043    2.4  11.1  127.2   2.6425   4.7    2.7	GX 17+2                       
275.8681 -30.3097    4.3   5.4  -40.1   1.4422   2.7    4.5	H1820-303                     
285.0627 -25.1312    0.0   8.1 -129.1   0.8649   1.5   12.7	HT1900.1-2455                 
288.7583  11.0288    2.8  38.0  158.1   4.3663   4.1    5.5	GRS 1915+105                  
263.0491 -33.6937    3.0  14.3    7.1   1.9771   3.8    9.0	GX 354-0                      
297.3696  25.1361    3.2  54.1  161.6   9.8796   3.6 ------	UNKNOWN                       
273.1463 -14.4311    3.8  10.9  122.3   1.6170   3.0 ------	UNKNOWN                       
266.4322 -29.0285    1.7   9.5   20.2   3.9743   6.9 ------	UNKNOWN                       
242.3310 -49.5658    4.7  35.9   -4.4   1.8243   2.5 ------	UNKNOWN                       
322.2877  11.1607    4.0  57.7 -165.4   8.9296   2.9 ------	UNKNOWN                       
329.4930  -4.3472    5.7  55.2 -145.1   9.7619   2.1 ------	UNKNOWN