GRB130609A

Analysis Summary

Notes:

1) No attempt has been made to eliminate the non-significant decimal places.
2) This batgrbproduct analysis is done using the HEASARC data.
3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Wed Sep 10 21:22:01 EDT 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger557782
======================================================================

  Trigger: 00557782      Segment: 000

  BAT Trigger Time: 392439919.296   [s; MET]
      Trigger Stop: 392439919.808   [s; MET]
               UTC: 2013-06-09T03:05:08.643500    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 152.675973444186   Dec: 24.1013777128368  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.68
     Image Trigger?:     NO
     Rate S/N Ratio:     16.431676725155  [ if not an image trigger ]
     Image S/N Ratio:    9.68

  Analysis Position:   [ source = BAT ]
    RA: 152.675973444186   Dec: 24.1013777128368  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 152.681399168073   Dec: 24.1264911388588  [deg; J2000]  
        { 10h 10m 43.5s , +24d 07' 35.4" }
         +/- 1.11928922489939 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.343029922818602 [arcmin] (formal 1-sigma fit error)
    SNR: 25.8940973121231
 
  Angular difference between the analysis and refined position is 1.535823 arcmin
 
  Partial Coding Fraction: 0.875    [ including projection effects ]

  Duration
     T90: 7.05599993467331 +/- 0.797686635421695
        Measured from: -0.568000018596649
                   to: 6.48799991607666     [s; relative to TRIGTIME]
     T50: 2.93199998140335 +/- 0.380525912837393
        Measured from: 0.691999971866608
                   to: 3.62399995326996     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.523999989032745     
                   to: 1.52399998903275     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.18000000715256     
                   to: 7.283999979496     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.367284   0.405406   0.249264   0.021392
           0.020003   0.020915   0.018038   0.014982 [error]
 Peak      0.079285   0.087818   0.045957  -0.006915
           0.007348   0.007854   0.006469   0.005139 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    8.464   -1.180    7.284
T90     7.056   -0.568    6.488
T50     2.932    0.692    3.624
Peak    1.000    0.524    1.524
 
 
====== 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      -1.879    -0.114      0.112       -           -               -         7.37e-03     -5.19e-04          5.13e-04      60.580   57
CPL     -1.283    -0.442      0.490       53.874     -10.063        29.634      1.56e-02     -6.52e-03          1.30e-02      55.040   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      -1.994     -0.192     0.181       -           -               -         1.22e-02     -1.60e-03          1.57e-03      53.500   57
CPL     -1.261     -0.719     0.857       41.681      N/A           N/A         3.28e-02        N/A               N/A         50.440   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   1.14e-07  1.66e-07  1.81e-07  3.68e-07  5.74e-07  8.29e-07   erg/cm2
      90%_error_low -1.04e-08 -9.94e-09 -1.74e-08 -6.75e-08 -3.99e-08 -8.56e-08   erg/cm2
      90%_error_hi   1.06e-08  9.95e-09  1.75e-08  7.71e-08  4.04e-08  9.29e-08   erg/cm2
Peak flux       PL   8.11e-01  6.10e-01  3.06e-01  2.20e-01  1.83e+00  1.95e+00   ph/cm2/s
      90%_error_low -1.13e-01 -6.17e-02 -5.19e-02 -6.34e-02 -1.84e-01 -1.99e-01   ph/cm2/s
      90%_error_hi   1.15e-01  6.17e-02  5.28e-02  7.74e-02  1.84e-01  1.99e-01   ph/cm2/s
 
Fluence        CPL   1.06e-07  1.77e-07  1.80e-07  1.47e-07  5.42e-07  6.10e-07   erg/cm2
      90%_error_low -1.21e-08 -1.27e-08 -1.93e-08 -6.74e-08 -4.48e-08 -8.25e-08   erg/cm2
      90%_error_hi   1.22e-08  1.29e-08  1.91e-08  1.36e-07  4.58e-08  1.41e-07   erg/cm2
Peak flux      CPL   7.60e-01  6.66e-01  3.02e-01  8.45e-02  1.79e+00  1.81e+00   ph/cm2/s
      90%_error_low -1.26e-01 -8.19e-02 -6.07e-02 -5.39e-02 -1.87e-01 -1.98e-01   ph/cm2/s
      90%_error_hi   1.27e-01  8.48e-02  5.88e-02  1.33e-01  1.88e-01  2.13e-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
  152.6814    24.1265   0.0074    18.7366  -127.2700         1.0455414     25.894 TRIG_00557782                 
 
Foreground time interval of the image:
 -1.180   7.284 (delta_t =   8.464 [sec])
Background time interval of the image:
-239.296  -1.180 (delta_t = 238.116 [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:

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve

Spectra

Notes:

1) The fitting includes the systematic errors.
2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.

Time averaged spectrum fit using the average DRM

Power-law model

Time interval is from   -1.180 sec. to    7.284 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.87941     ( -0.114467   0.111605 )
Norm@50keV  : 7.37463E-03    ( -0.000519291   0.000513291 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.58 using 59 PHA bins.
# Reduced chi-squared =          1.063 for     57 degrees of freedom 
# Null hypothesis probability =   3.481321e-01
 
Photon flux (15-150 keV)    in 8.464 sec: 1.04927 ( -0.063692  0.06375 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.73913e-07 ( -3.9944e-08  4.03664e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -1.180 sec. to    7.284 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.28257     ( -0.441884   0.489666 )
Epeak [keV] : 53.8745      ( -10.063 29.6337 )
Norm@50keV  : 1.56074E-02    ( -0.00651622   0.0130119 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.04 using 59 PHA bins.
# Reduced chi-squared =         0.9829 for     56 degrees of freedom 
# Null hypothesis probability =   5.110730e-01
 
Photon flux (15-150 keV)    in 8.464 sec: 1.01826 ( -0.067302  0.06738 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.42432e-07 ( -4.47919e-08  4.57956e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.524 sec. to    1.524 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.99386     ( -0.191786   0.181163 )
Norm@50keV  : 1.22324E-02    ( -0.00160153   0.00156775 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.50 using 59 PHA bins.
# Reduced chi-squared =         0.9385 for     57 degrees of freedom 
# Null hypothesis probability =   6.073301e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.82983 ( -0.18417  0.18417 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.1279e-07 ( -1.38163e-08  1.41008e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.524 sec. to    1.524 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.26068     ( -0.718852   0.857444 )
Epeak [keV] : 41.6814      (   )
Norm@50keV  : 3.27704E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          50.44 using 59 PHA bins.
# Reduced chi-squared =         0.9006 for     56 degrees of freedom 
# Null hypothesis probability =   6.846154e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.79013 ( -0.18719  0.18759 ) ph/cm2/s
Energy fluence (15-150 keV)             : 0 ( 0  0 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 7.056 sec.
Hardness ratio (energy fluence ratio) = 1.08722603897

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

S(15-50 keV)  = 2.801979e-07
S(50-150 keV) = 2.937071e-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 = -2.054055758425427E-01, IMY = 2.699267135133130E-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:
-239.296000 -1.180000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
220.8947  37.3725    2.2  40.9   33.0   2.1571   5.2 ------	UNKNOWN                       
148.8225  45.9951    2.1  26.5  -70.8   1.5081   5.4 ------	UNKNOWN

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

Time interval of the image:
-1.180000 7.284000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
233.6402  55.7313    1.9  51.0    8.3   0.6228   6.1 ------	UNKNOWN                       
152.6814  24.1265    0.4  18.7 -127.3   1.0455  25.9 ------	UNKNOWN                       
169.8186  69.3625    2.2  41.7  -32.6   0.3213   5.2 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
51.004590 842.834000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
174.2898   5.5101    1.9  27.9  112.3   3.4863   6.0 ------	UNKNOWN                       
136.6022 -24.7855    2.6  51.3 -177.3   4.6651   4.4 ------	UNKNOWN                       
135.9740 -10.6679    2.4  38.4 -169.0   2.5647   4.9 ------	UNKNOWN                       
101.7665  61.6166    5.1  50.7  -44.6   5.1251   2.3 ------	UNKNOWN

Analysis Summary

Notes:

Image

Pre-slew 15.0-350.0 keV image (Event data)

Light Curves

Full-time range; 1 s binning

Other quick-look light curves:

64 ms binning (zoomed) 16 ms binning (zoomed) 8 ms binning (zoomed) 2 ms binning (zoomed) SN=5 or 10 s binning (full-time range) Raw light curve

Spectra

Notes:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Power-law model

Cutoff power-law model

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

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

Mask shadow pattern

Spacecraft aspect plot

Bright source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

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

Post-slew image of 15-350 keV band

64 ms binning (zoomed)
16 ms binning (zoomed)
8 ms binning (zoomed)
2 ms binning (zoomed)
SN=5 or 10 s binning (full-time range)
Raw light curve