Analysis Summary

Notes:

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Jan 22 21:00:12 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger150139
======================================================================

  Trigger: 00150139      Segment: 000

  BAT Trigger Time: 145608309.44   [s; MET]
      Trigger Stop: 145608309.952   [s; MET]
               UTC: 2005-08-13T06:45:09.768120    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 242.009891218405   Dec: 11.2520458868854  [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:     7.74596669241483  [ if not an image trigger ]
     Image S/N Ratio:    7.27

  Analysis Position:   [ source = BAT ]
    RA: 242.009891218405   Dec: 11.2520458868854  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 242.01   Dec: 11.252  [deg; J2000]
        { 16h 08m 02.4s , +11d 15' 07.2" }
        +/- 2.78639273751 [arcmin] (estimated 90% radius based on SNR)
    SNR: 7.03720886696
 
 
  Angular difference between the analysis and refined position is 0.006968 arcmin
 
  Partial Coding Fraction: 0.4804688    [ including projection effects ]

  Duration
     T90: 0.384000033140182 +/- 0.111946409943277
        Measured from: -0.00400000810623169
                   to: 0.380000025033951     [s; relative to TRIGTIME]
     T50: 0.188000023365021 +/- 0.132966175955436
        Measured from: 0.0879999995231628
                   to: 0.276000022888184     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.303999990224838     
                   to: 0.696000009775162     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0239999890327454     
                   to: 0.412000000476837     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.011601   0.026580   0.021005   0.000719
           0.004787   0.004860   0.004559   0.004171 [error]
 Peak      0.015804   0.024329   0.020997  -0.001068
           0.006896   0.007109   0.006657   0.006008 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    0.436   -0.024    0.412
T90     0.384   -0.004    0.380
T50     0.188    0.088    0.276
Peak    1.000   -0.304    0.696
 
 
====== 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      -1.213    -0.343      0.356       -           -               -         9.49e-03     -2.15e-03          2.15e-03      54.080   57
CPL      1.418    -1.908      3.144       64.615     -15.118        44.312      1.93e-01     -1.93e-01          7.11e+00      47.790   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      -1.235     -0.520     0.540       -           -               -         4.20e-03     -1.39e-03          1.39e-03      58.550   57
CPL      1.285     -2.561     6.551       63.580     -15.842      2152.890      7.89e-02     -7.89e-02          1.19e+02      55.800   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   4.04e-09  8.86e-09  1.53e-08  6.11e-08  4.19e-08  8.93e-08   erg/cm2
      90%_error_low -1.48e-09 -2.24e-09 -3.97e-09 -2.73e-08 -1.02e-08 -3.11e-08   erg/cm2
      90%_error_hi   1.67e-09  2.21e-09  3.97e-09  3.95e-08  1.03e-08  4.14e-08   erg/cm2
Peak flux       PL   1.34e-01  1.58e-01  1.34e-01  1.94e-01  4.96e-01  6.21e-01   ph/cm2/s
      90%_error_low -6.90e-02 -5.88e-02 -5.11e-02 -1.14e-01 -1.66e-01 -2.06e-01   ph/cm2/s
      90%_error_hi   8.20e-02  5.78e-02  5.09e-02  1.86e-01  1.67e-01  2.21e-01   ph/cm2/s
 
Fluence        CPL   2.54e-09  1.11e-08  1.69e-08  5.44e-09  3.51e-08  3.60e-08   erg/cm2
      90%_error_low -1.53e-09 -3.02e-09 -5.94e-09    N/A    -1.01e-08 -1.09e-08   erg/cm2
      90%_error_hi   1.91e-09  3.24e-09  5.31e-09    N/A     1.12e-08  2.07e-08   erg/cm2
Peak flux      CPL   8.29e-02  1.95e-01  1.51e-01  2.43e-02  4.51e-01  4.53e-01   ph/cm2/s
      90%_error_low -8.29e-02 -7.80e-02 -7.39e-02 -2.43e-02 -1.67e-01 -1.69e-01   ph/cm2/s
      90%_error_hi   9.61e-02  8.41e-02  6.77e-02  1.86e-01  1.73e-01  2.12e-01   ph/cm2/s
 
======================================================================
  • Special notes of this burst




    Image

    Pre-slew 25.0-100.0 keV image (Event data)

    #RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
242.010 11.252 0.000 26.983 110.380 0.051 7.037 TRIG_00150139
 
Image time interval: 0.000 to 0.512 [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   -0.024 sec. to    0.412 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.21318     ( -0.344386   0.355286 )
Norm@50keV  : 9.49449E-03    ( -0.00214829   0.00214826 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.08 using 59 PHA bins.
# Reduced chi-squared =         0.9488 for     57 degrees of freedom 
# Null hypothesis probability =   5.853443e-01
 
Photon flux (15-150 keV)    in 0.436 sec: 1.11643 ( -0.258137  0.25962 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.18578e-08 ( -1.01507e-08  1.03081e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.024 sec. to    0.412 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.41758     ( -1.91223   3.13986 )
Epeak [keV] : 64.6151      ( -15.0676 44.3617 )
Norm@50keV  : 0.193100    ( -0.194387   7.10679 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.79 using 59 PHA bins.
# Reduced chi-squared =         0.8534 for     56 degrees of freedom 
# Null hypothesis probability =   7.743358e-01
 
Photon flux (15-150 keV)    in 0.436 sec: 1.02242 ( -0.256426  0.26507 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.51218e-08 ( -1.00816e-08  1.12066e-08 ) ergs/cm2

    1-s peak spectrum fit

    Power-law model
    Time interval is from   -0.304 sec. to    0.696 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.23506     ( -0.520556   0.539578 )
Norm@50keV  : 4.20344E-03    ( -0.00139032   0.001389 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          58.55 using 59 PHA bins.
# Reduced chi-squared =          1.027 for     57 degrees of freedom 
# Null hypothesis probability =   4.182644e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.495939 ( -0.16584  0.166874 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.22474e-08 ( -1.50893e-08  1.55888e-08 ) ergs/cm2
    Cutoff power-law model
    Time interval is from   -0.304 sec. to    0.696 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 1.28476     ( -2.69782   6.4148 )
Epeak [keV] : 63.5802      ( -14.7726 2153.96 )
Norm@50keV  : 7.89118E-02    ( -0.0961995   119.44 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.80 using 59 PHA bins.
# Reduced chi-squared =         0.9965 for     56 degrees of freedom 
# Null hypothesis probability =   4.823086e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.450882 ( -0.166537  0.172906 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.47088e-08 ( -1.38557e-08  1.72358e-08 ) ergs/cm2

    Time-resolved spectra




    Distribution

    T90 vs. Hardness ratio plot 

    T90                                   = 0.384 sec.
Hardness ratio (energy fluence ratio) = 1.72631496937

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

    S(15-50 keV)  = 1.2896061e-08
S(50-150 keV) = 2.896231e-08

    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 = -0.177306549307, IMY = -0.477271609489

    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:
-299.440000 -0.024000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6357  35.3113    6.1  30.9   54.0   0.5186   1.9    8.9	Her X-1                       
193.7842 -25.8736    3.6  59.0 -166.1   3.6435   3.2 ------	UNKNOWN

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

    Time interval of the image:
-0.024000 0.412000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4352  35.1870    3.2  30.7   54.2   0.0340   3.5    9.4	Her X-1                       
241.9926  11.2491    1.7  27.0  110.4   0.0617   7.0 ------	UNKNOWN

    Post-slew image of 15-350 keV band 

    Time interval of the image:
57.860600 302.623500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9876 -15.6395    0.2  27.1  157.5  14.5617  63.3    0.5	Sco X-1                       
254.4229  35.3361    3.9  26.6    7.0   0.6577   3.0    1.7	Her X-1                       
255.8291 -37.9457    5.6  50.9  149.8   2.0013   2.1    9.6	4U 1700-377                   
256.2326 -36.5529    7.9  49.7  148.9  -1.3456  -1.5   12.5	GX 349+2                      
262.8749 -24.7042  437.2  41.3  134.5   0.0168   0.0    7.7	GX 1+4                        
268.3923  -1.4291    2.0  29.2   98.1   1.9094   5.8    2.0	SW J1753.5-0127               
263.0030 -33.8867   10.8  49.4  140.8   1.0971   1.1    3.2	GX 354-0                      
240.3320  14.7985    2.8   3.9  -40.5   0.7885   4.1 ------	UNKNOWN                       
243.7354  26.4257    2.9  15.2  -10.2   0.7488   4.0 ------	UNKNOWN