GRB130606A: Summary Image Light curves Spectra Distribution Others

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: Sun Jan 12 02:04:13 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger557589
======================================================================

  Trigger: 00557589      Segment: 000

  BAT Trigger Time: 392245489.664   [s; MET]
      Trigger Stop: 392245490.688   [s; MET]
               UTC: 2013-06-06T21:04:39.020180    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 249.403240279661   Dec: 29.7909669508947  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.14
     Image Trigger?:     NO
     Rate S/N Ratio:     15.0996688705415  [ if not an image trigger ]
     Image S/N Ratio:    8.14

  Analysis Position:   [ source = BAT ]
    RA: 249.403240279661   Dec: 29.7909669508947  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 249.389817115288   Dec: 29.7972578154866  [deg; J2000]  
        { 16h 37m 33.6s , +29d 47' 50.1" }
         +/- 2.00537997111854 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.725935110610736 [arcmin] (formal 1-sigma fit error)
    SNR: 11.2566418125869
 
  Angular difference between the analysis and refined position is 0.794339 arcmin
 
  Partial Coding Fraction: 0.96875    [ including projection effects ]

  Duration
     T90: 276.65600001812 +/- 19.6308524182913
        Measured from: 0.496000051498413
                   to: 277.152000069618     [s; relative to TRIGTIME]
     T50: 60.5440000295639 +/- 12.5902946920985
        Measured from: 102.112000048161
                   to: 162.656000077724     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 160.356000006199     
                   to: 161.356000006199     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -1.34399998188019     
                   to: 296.912000000477     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.325837   1.733965   1.294984   0.356747
           0.100994   0.103716   0.091994   0.084394 [error]
 Peak      0.065408   0.116133   0.114870   0.044521
           0.006609   0.007966   0.007865   0.006114 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  298.256   -1.344  296.912
T90   276.656    0.496  277.152
T50    60.544  102.112  162.656
Peak    1.000  160.356  161.356
 
 
====== 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      -1.519    -0.121      0.120       -           -               -         9.77e-04     -6.81e-05          6.77e-05      52.240   57
CPL     -1.291    -0.291      0.488      150.299     -72.483      -150.299      1.28e-03     -3.61e-04          9.82e-04      51.480   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      -1.012     -0.124     0.126       -           -               -         2.18e-02     -1.54e-03          1.54e-03      63.130   57
CPL     -0.913     -0.158     0.482      625.590    -625.590      -625.590      2.41e-02     -3.61e-03          1.51e-02      62.990   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   3.79e-07  6.88e-07  9.61e-07  2.80e-06  2.76e-06  4.83e-06   erg/cm2
      90%_error_low -4.23e-08 -4.75e-08 -8.88e-08 -5.18e-07 -2.11e-07 -5.95e-07   erg/cm2
      90%_error_hi   4.35e-08  4.73e-08  8.89e-08  5.95e-07  2.14e-07  6.59e-07   erg/cm2
Peak flux       PL   5.62e-01  7.57e-01  7.51e-01  1.34e+00  2.51e+00  3.41e+00   ph/cm2/s
      90%_error_low -7.80e-02 -6.52e-02 -6.02e-02 -2.20e-01 -1.79e-01 -2.72e-01   ph/cm2/s
      90%_error_hi   8.17e-02  6.45e-02  5.97e-02  2.47e-01  1.79e-01  2.79e-01   ph/cm2/s
 
Fluence        CPL   3.66e-07  7.05e-07  9.70e-07  1.92e-06  2.70e-06  3.96e-06   erg/cm2
      90%_error_low -4.94e-08 -5.73e-08 -9.23e-08 -9.55e-07 -2.42e-07 -9.84e-07   erg/cm2
      90%_error_hi   4.98e-08  5.88e-08  9.37e-08  1.04e-06  2.42e-07  1.10e-06   erg/cm2
Peak flux      CPL   2.81e-01  2.19e-01  1.20e-01  1.16e-01  6.66e-01  7.57e-01   ph/cm2/s
      90%_error_low -1.23e-01 -8.77e-02 -3.02e-02 -9.12e-03 -2.53e-01 -2.40e-01   ph/cm2/s
      90%_error_hi   4.68e-02  6.93e-02  2.40e-02  9.98e-03  1.93e-01  1.46e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  249.3898    29.7973   0.0171    22.7361  -158.7690         0.5935933     11.257 TRIG_00557589                 
 
Foreground time interval of the image:
 -1.344  16.837 (delta_t =  18.181 [sec])
Background time interval of the image:
-190.763  -1.344 (delta_t = 189.419 [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

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   -1.344 sec. to  296.912 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.51869     ( -0.120788   0.120014 )
Norm@50keV  : 9.77123E-04    ( -6.81123e-05   6.77404e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          52.24 using 59 PHA bins.
# Reduced chi-squared =         0.9165 for     57 degrees of freedom 
# Null hypothesis probability =   6.538391e-01
 
Photon flux (15-150 keV)    in 298.3 sec: 0.122610 ( -0.008276  0.008283 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.75717e-06 ( -2.11492e-07  2.13698e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -1.344 sec. to  296.912 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.29077     ( -0.291277   0.488258 )
Epeak [keV] : 150.299      ( -72.4834 -150.3 )
Norm@50keV  : 1.28332E-03    ( -0.000361368   0.000981836 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.48 using 59 PHA bins.
# Reduced chi-squared =         0.9193 for     56 degrees of freedom 
# Null hypothesis probability =   6.463191e-01
 
Photon flux (15-150 keV)    in 298.3 sec: 0.121205 ( -0.008722  0.008705 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.69658e-06 ( -2.42077e-07  2.42379e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from  160.356 sec. to  161.356 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.01167     ( -0.124083   0.125553 )
Norm@50keV  : 2.17567E-02    ( -0.00153797   0.0015366 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.13 using 59 PHA bins.
# Reduced chi-squared =          1.108 for     57 degrees of freedom 
# Null hypothesis probability =   2.686305e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.50643 ( -0.17932  0.17949 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.34326e-07 ( -1.86857e-08  1.88019e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  160.356 sec. to  161.356 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.913282     ( -0.1582   0.482285 )
Epeak [keV] : 625.590      ( -625.59 -625.59 )
Norm@50keV  : 2.41234E-02    ( -0.00360537   0.0151456 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          62.99 using 59 PHA bins.
# Reduced chi-squared =          1.125 for     56 degrees of freedom 
# Null hypothesis probability =   2.427356e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.666125 ( -0.252904  0.192767 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.33163e-07 ( -1.95784e-08  1.92897e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 276.656 sec.
Hardness ratio (energy fluence ratio) = 1.39601492568

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

S(15-50 keV)  = 1.0668705e-06
S(50-150 keV) = 1.6903334e-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 = -3.906085022890637E-01, IMY = 1.517500515839977E-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:
-190.763400 -1.344000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.6423  35.4200    7.6  21.9 -140.0  -0.2941  -1.5   10.2	Her X-1                       
268.4821  -1.4196    6.5  21.4   89.9  -0.3981  -1.8    7.1	SW J1753.5-0127               
273.9632 -13.9037   12.6  33.7   76.9   0.3789   0.9    8.3	GX 17+2                       
288.8033  10.9552    0.8  18.5   16.3   2.6162  15.2    0.7	GRS 1915+105                  
299.5890  35.1256    3.4  28.8  -47.5   0.7408   3.4    4.6	Cyg X-1                       
308.0704  40.8973    3.7  37.3  -52.1   0.9860   3.2    3.8	Cyg X-3                       
326.3080  38.2501   30.0  50.3  -43.3   0.4238   0.4    7.7	Cyg X-2                       
214.8382  16.5822    3.1  54.1  177.1   2.8787   3.7 ------	UNKNOWN                       
232.9090  31.6368    2.7  36.9 -162.7   0.9717   4.2 ------	UNKNOWN                       
326.7058  39.1790    4.1  50.7  -44.5   3.0004   2.8 ------	UNKNOWN                       

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

Time interval of the image:
-1.344000 16.836600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3170  35.4843    4.6  22.1 -140.3  -0.1365  -2.5   10.9	Her X-1                       
268.2454  -1.3322    5.0  21.4   90.6   0.1555   2.3   10.3	SW J1753.5-0127               
273.8571 -14.1087  101.2  33.9   77.1   0.0124   0.1    9.7	GX 17+2                       
288.9093  10.7735    0.0  18.7   16.7  -0.0589  -1.2   12.2	GRS 1915+105                  
299.5286  35.0683   26.4  28.8  -47.4  -0.0271  -0.4    8.6	Cyg X-1                       
308.0057  41.1083    7.6  37.4  -52.4   0.1366   1.5   10.5	Cyg X-3                       
326.1372  38.3927    3.5  50.1  -43.5   0.7808   3.3    4.6	Cyg X-2                       
235.5920  -4.3384    2.1  43.0  140.4   0.8476   5.4 ------	UNKNOWN                       
249.3898  29.7973    1.0  22.7 -158.8   0.5935  11.3 ------	UNKNOWN                       
265.1741  40.7074    1.9  21.8 -113.3   0.3351   6.1 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
61.436590 962.386000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.4107  35.2935    6.6   6.9  -47.1   0.9617   1.7    3.7	Her X-1                       
268.3745  -1.4416   16.2  36.1   63.4   0.9418   0.7    0.8	SW J1753.5-0127               
288.7875  10.9231    1.0  41.2   25.7  11.1224  11.9    1.5	GRS 1915+105                  
299.5790  35.0841    2.9  42.2  -13.9   3.0302   4.0    7.1	Cyg X-1                       
308.0922  40.9609    2.5  48.2  -23.2   5.7029   4.7    1.0	Cyg X-3                       
220.2207  -7.0118    2.8  46.3  138.9  10.2571   4.2 ------	UNKNOWN                       
195.3402   9.8236    4.6  54.1  177.0   5.7673   2.5 ------	UNKNOWN                       
249.3903  29.8293    1.2   0.1 -115.5   4.9402   9.4 ------	UNKNOWN                       
190.8572  11.3177    3.7  57.2 -178.9  11.4269   3.2 ------	UNKNOWN                       
212.8719  33.7836    3.5  31.2 -156.2   2.3693   3.3 ------	UNKNOWN                       
220.6487  37.2982    3.1  25.0 -148.0   2.0125   3.8 ------	UNKNOWN                       
225.9346  43.1627    3.1  23.0 -131.2   2.1397   3.7 ------	UNKNOWN                       
185.3452  21.3341    4.1  57.7 -165.4   9.4656   2.8 ------	UNKNOWN                       
184.2286  20.2947    3.7  59.1 -166.1  14.5760   3.1 ------	UNKNOWN                       
182.1903  25.8401    3.7  58.7 -159.3  16.6563   3.1 ------	UNKNOWN                       
223.2586  67.8604    6.1  41.1  -97.8   7.2354   1.9 ------	UNKNOWN                       
186.1790  46.3146    4.0  51.0 -135.7  10.4110   2.9 ------	UNKNOWN