GRB130206A: 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 05:36:56 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger547918
======================================================================

  Trigger: 00547918      Segment: 000

  BAT Trigger Time: 381872198.784   [s; MET]
      Trigger Stop: 381872200.832   [s; MET]
               UTC: 2013-02-06T19:36:28.596780    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 140.374791824771   Dec: -58.1604827693569  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.15
     Image Trigger?:     NO
     Rate S/N Ratio:     14.3527000944073  [ if not an image trigger ]
     Image S/N Ratio:    8.15

  Analysis Position:   [ source = BAT ]
    RA: 140.374791824771   Dec: -58.1604827693569  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 140.377028982237   Dec: -58.1994806823637  [deg; J2000]  
        { 09h 21m 30.5s , -58d 11' 58.1" }
         +/- 1.54546431335891 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.516519850310467 [arcmin] (formal 1-sigma fit error)
    SNR: 16.3318025698332
 
  Angular difference between the analysis and refined position is 2.340945 arcmin
 
  Partial Coding Fraction: 0.5234375    [ including projection effects ]

  Duration
     T90: 121 +/- 32.3882694814033
        Measured from: -4.783999979496
                   to: 116.216000020504     [s; relative to TRIGTIME]
     T50: 45 +/- 7.21110255092798
        Measured from: 7.216000020504
                   to: 52.216000020504     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 1.216000020504     
                   to: 2.216000020504     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.783999979496     
                   to: 147.216000020504     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.015228   1.074623   0.948257   0.146027
           0.094701   0.095118   0.083836   0.075957 [error]
 Peak      0.034062   0.042924   0.024420   0.012197
           0.007978   0.008372   0.007583   0.006586 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  156.000   -8.784  147.216
T90   121.000   -4.784  116.216
T50    45.000    7.216   52.216
Peak    1.000    1.216    2.216
 
 
====== 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      -1.589    -0.167      0.165       -           -               -         1.35e-03     -1.27e-04          1.26e-04      59.270   57
CPL     -1.588    -0.166      0.551     9999.160    -9999.160      -9999.160      1.35e-03     -4.51e-04          1.18e-03      59.270   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      -1.655     -0.403     0.390       -           -               -         6.70e-03     -1.73e-03          1.69e-03      55.980   57
CPL     -1.044     -1.338     2.508       64.984     -51.486       -64.984      1.53e-02     -1.53e-02          7.24e-01      55.400   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   2.92e-07  5.08e-07  6.76e-07  1.84e-06  1.97e-06  3.32e-06   erg/cm2
      90%_error_low -4.39e-08 -4.71e-08 -8.55e-08 -4.53e-07 -2.00e-07 -5.30e-07   erg/cm2
      90%_error_hi   4.56e-08  4.68e-08  8.52e-08  5.48e-07  2.03e-07  6.06e-07   erg/cm2
Peak flux       PL   3.20e-01  2.94e-01  1.87e-01  1.82e-01  8.77e-01  9.83e-01   ph/cm2/s
      90%_error_low -1.09e-01 -6.90e-02 -6.00e-02 -9.27e-02 -2.03e-01 -2.31e-01   ph/cm2/s
      90%_error_hi   1.16e-01  6.87e-02  6.10e-02  1.40e-01  2.03e-01  2.34e-01   ph/cm2/s
 
Fluence        CPL   2.93e-07  5.06e-07  6.75e-07  1.93e-06  1.98e-06  3.20e-06   erg/cm2
      90%_error_low -4.79e-08 -4.57e-08 -8.88e-08 -1.14e-06 -2.31e-07 -9.59e-07   erg/cm2
      90%_error_hi   3.59e-08  5.34e-08  9.35e-08  2.12e-07  1.57e-07  6.95e-07   erg/cm2
Peak flux      CPL   3.06e-01  3.19e-01  1.85e-01  7.56e-02  8.59e-01  8.85e-01   ph/cm2/s
      90%_error_low -1.16e-01 -8.53e-02 -9.91e-02 -7.56e-02 -2.06e-01 -2.26e-01   ph/cm2/s
      90%_error_hi   1.21e-01  9.09e-02  6.80e-02  1.49e-01  2.07e-01  2.79e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  140.3770   -58.1995   0.0118    30.6001    36.7810         3.8008661     16.332 TRIG_00547918                 
 
Foreground time interval of the image:
 -8.784 147.216 (delta_t = 156.000 [sec])
Background time interval of the image:
-239.784  -8.784 (delta_t = 231.000 [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   -8.784 sec. to  147.216 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.58852     ( -0.166595   0.164687 )
Norm@50keV  : 1.34933E-03    ( -0.000127225   0.000126037 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.27 using 59 PHA bins.
# Reduced chi-squared =          1.040 for     57 degrees of freedom 
# Null hypothesis probability =   3.928505e-01
 
Photon flux (15-150 keV)    in 156 sec: 0.172790 ( -0.015748  0.015779 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97167e-06 ( -2.00359e-07  2.02758e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -8.784 sec. to  147.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.58806     ( -0.166275   0.550984 )
Epeak [keV] : 9999.16      ( -9999.35 -9999.35 )
Norm@50keV  : 1.34935E-03    ( -0.00045398   0.0011732 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.27 using 59 PHA bins.
# Reduced chi-squared =          1.058 for     56 degrees of freedom 
# Null hypothesis probability =   3.571907e-01
 
Photon flux (15-150 keV)    in 156 sec: 0.173183 ( -0.016186  0.016043 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.97803e-06 ( -2.31389e-07  1.56705e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    1.216 sec. to    2.216 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.6554     ( -0.403484   0.390416 )
Norm@50keV  : 6.70068E-03    ( -0.00172869   0.00168683 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.98 using 59 PHA bins.
# Reduced chi-squared =         0.9821 for     57 degrees of freedom 
# Null hypothesis probability =   5.133478e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.876540 ( -0.203302  0.20346 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.22945e-08 ( -1.65857e-08  1.72463e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    1.216 sec. to    2.216 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.04371     ( -1.33644   2.50943 )
Epeak [keV] : 64.9839      ( -51.4829 -64.9806 )
Norm@50keV  : 1.52938E-02    ( -0.0152831   0.723641 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.40 using 59 PHA bins.
# Reduced chi-squared =         0.9893 for     56 degrees of freedom 
# Null hypothesis probability =   4.974262e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.858841 ( -0.206023  0.206909 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.75546e-08 ( -1.62251e-08  1.99737e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 121.0 sec.
Hardness ratio (energy fluence ratio) = 1.33005617646

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

S(15-50 keV)  = 8.005444e-07
S(50-150 keV) = 1.1711096e-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 = 4.736715253089596E-01, IMY = -3.541063402407680E-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:
-239.784000 -8.784000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.3020 -60.5941    1.9  16.4   51.9   1.2528   6.0    1.8	Cen X-3                       
186.5448 -62.7814    2.5   8.5   54.9   0.8013   4.6    3.1	GX 301-2                      
244.9453 -15.6425    1.1  55.2 -164.6   7.3948  10.9    2.0	Sco X-1                       
255.9605 -37.8568    2.3  39.5 -139.2   1.6267   5.0    1.4	4U 1700-377                   
256.4265 -36.4576    3.5  40.8 -139.8   1.0891   3.3    2.1	GX 349+2                      
264.5199 -44.3536  119.4  37.9 -124.7   0.0309   0.1   11.2	4U 1735-44                    
262.9347 -33.9669    8.4  45.7 -135.1  -0.6903  -1.4    8.4	GX 354-0                      
121.1635 -43.7172    2.0  49.3   38.6   5.3844   5.9 ------	UNKNOWN                       
118.1265 -59.9082    3.0  38.1   21.2   1.1040   3.9 ------	UNKNOWN                       
  4.0902 -64.5759    4.2  50.8  -44.5   2.5921   2.8 ------	UNKNOWN                       
  8.8072 -63.6135    2.9  52.1  -42.2   3.7976   3.9 ------	UNKNOWN                       

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

Time interval of the image:
-8.784000 147.216000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.2759 -60.7232    7.5  16.4   51.5   0.2572   1.5    6.1	Cen X-3                       
186.5646 -62.9519    4.4   8.4   53.8  -0.4187  -2.6   11.2	GX 301-2                      
244.8971 -15.7739    0.0  55.1 -164.6  -0.6370  -1.2    9.3	Sco X-1                       
255.9606 -37.8399    5.8  39.5 -139.2  -0.5062  -2.0    1.3	4U 1700-377                   
256.6465 -36.5459   46.7  40.9 -139.5  -0.0695  -0.2   12.6	GX 349+2                      
264.6347 -44.5570    4.9  37.8 -124.4   0.6953   2.3    7.9	4U 1735-44                    
263.0879 -33.7005    0.0  46.0 -135.2  -0.8633  -1.9    9.4	GX 354-0                      
140.3770 -58.1995    0.7  30.6   36.8   3.8012  16.3 ------	UNKNOWN                       
231.5410 -11.3717    1.9  55.5  178.7   4.4420   6.1 ------	UNKNOWN                       
 31.8628 -58.5220    1.9  57.7  -28.9   5.8498   5.9 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
741.516600 962.280800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3276  35.2399    3.3  29.5   37.1   0.8099   3.5    8.9	Her X-1                       
268.2597  -1.4059    4.7  48.7  -19.5   0.9121   2.5    7.1	SW J1753.5-0127               
288.7713  10.9437    0.9  31.7  -46.2   3.1371  12.8    1.6	GRS 1915+105                  
299.5922  35.1936    0.6   9.8  -94.6   3.5052  20.0    0.5	Cyg X-1                       
308.0982  40.9481    1.9  12.6 -139.1   1.0120   5.9    0.6	Cyg X-3                       
326.0399  38.2839    3.8  26.6 -143.4   0.5934   3.1    6.6	Cyg X-2                       
  8.5090  82.5186    2.5  46.2  139.1   3.3067   4.6 ------	UNKNOWN                       
290.4565  37.7391    3.0   4.9  -42.7   0.6083   3.8 ------	UNKNOWN                       
  3.1001  42.6941    3.1  51.1 -167.2   1.7961   3.7 ------	UNKNOWN                       
332.2138  16.0059    2.6  43.8 -116.3   3.4440   4.4 ------	UNKNOWN