GRB120514A: 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: Mon Jan 13 04:33:50 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger522197
======================================================================

  Trigger: 00522197      Segment: 000

  BAT Trigger Time: 358650778.112   [s; MET]
      Trigger Stop: 358650779.136   [s; MET]
               UTC: 2012-05-14T01:12:49.907220    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 282.990951117893   Dec: -4.25198537883337  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    12.68
     Image Trigger?:     NO
     Rate S/N Ratio:     20.4939015319192  [ if not an image trigger ]
     Image S/N Ratio:    12.68

  Analysis Position:   [ source = BAT ]
    RA: 282.990951117893   Dec: -4.25198537883337  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 283.000943264193   Dec: -4.25764758427625  [deg; J2000]  
        { 18h 52m 00.2s , -04d 15' 27.5" }
         +/- 1.11909635596373 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.528974345327054 [arcmin] (formal 1-sigma fit error)
    SNR: 25.900472802228
 
  Angular difference between the analysis and refined position is 0.687659 arcmin
 
  Partial Coding Fraction: 0.6171875    [ including projection effects ]

  Duration
     T90: 164.343999922276 +/- 5.84277336502904
        Measured from: -6.46399998664856
                   to: 157.879999935627     [s; relative to TRIGTIME]
     T50: 60.2559999227524 +/- 6.01174983947242
        Measured from: -0.303999960422516
                   to: 59.9519999623299     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.220000028610229     
                   to: 1.22000002861023     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -8.75199997425079     
                   to: 165.551999986172     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.327145   1.672550   1.280816   0.238409
           0.092936   0.085119   0.071023   0.058886 [error]
 Peak      0.041254   0.088243   0.083985   0.034039
           0.009808   0.009424   0.008146   0.006091 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  174.304   -8.752  165.552
T90   164.344   -6.464  157.880
T50    60.256   -0.304   59.952
Peak    1.000    0.220    1.220
 
 
====== 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      -1.569    -0.103      0.103       -           -               -         1.71e-03     -9.63e-05          9.60e-05      42.830   57
CPL     -1.426    -0.232      0.410      209.817    -209.817      -209.817      2.00e-03     -3.79e-04          1.12e-03      42.430   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      -1.179     -0.188     0.195       -           -               -         1.66e-02     -1.85e-03          1.84e-03      67.590   57
CPL     -0.933     -0.411     0.835      254.531    -254.531      -254.531      2.13e-02     -7.91e-03          2.60e-02      67.260   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   4.06e-07  7.15e-07  9.64e-07  2.67e-06  2.80e-06  4.76e-06   erg/cm2
      90%_error_low -4.14e-08 -4.37e-08 -6.98e-08 -4.05e-07 -1.67e-07 -4.56e-07   erg/cm2
      90%_error_hi   4.29e-08  4.34e-08  6.95e-08  4.53e-07  1.68e-07  4.93e-07   erg/cm2
Peak flux       PL   5.04e-01  6.14e-01  5.42e-01  8.24e-01  1.95e+00  2.48e+00   ph/cm2/s
      90%_error_low -1.13e-01 -8.82e-02 -6.24e-02 -1.87e-01 -2.31e-01 -2.70e-01   ph/cm2/s
      90%_error_hi   1.22e-01  8.69e-02  6.19e-02  2.20e-01  2.33e-01  2.72e-01   ph/cm2/s
 
Fluence        CPL   3.94e-07  7.24e-07  9.75e-07  2.17e-06  2.77e-06  4.26e-06   erg/cm2
      90%_error_low -5.11e-08 -4.85e-08 -7.46e-08 -8.99e-07 -1.85e-07 -9.12e-07   erg/cm2
      90%_error_hi   4.32e-08  4.96e-08  7.59e-08  1.02e-06  1.84e-07  6.54e-07   erg/cm2
Peak flux      CPL   4.70e-01  6.20e-01  5.59e-01  6.55e-01  1.92e+00  2.30e+00   ph/cm2/s
      90%_error_low -1.44e-01 -9.17e-02 -7.51e-02 -3.10e-01 -2.41e-01 -4.17e-01   ph/cm2/s
      90%_error_hi   1.47e-01  9.27e-02  8.10e-02  2.17e-01  2.42e-01  4.19e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  283.0009    -4.2576   0.0074    35.8019   178.0274         2.1497282     25.900 TRIG_00522197                 
 
Foreground time interval of the image:
 -8.752  17.789 (delta_t =  26.541 [sec])
Background time interval of the image:
-239.112  -8.752 (delta_t = 230.360 [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   -8.752 sec. to  165.552 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.56899     ( -0.103266   0.102926 )
Norm@50keV  : 1.71013E-03    ( -9.62951e-05   9.60499e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.83 using 59 PHA bins.
# Reduced chi-squared =         0.7515 for     57 degrees of freedom 
# Null hypothesis probability =   9.180779e-01
 
Photon flux (15-150 keV)    in 174.3 sec: 0.217709 ( -0.012954  0.013018 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.7991e-06 ( -1.67456e-07  1.68171e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -8.752 sec. to  165.552 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.42638     ( -0.232256   0.409512 )
Epeak [keV] : 209.817      ( -209.758 -209.758 )
Norm@50keV  : 2.00486E-03    ( -0.000378964   0.00111746 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.43 using 59 PHA bins.
# Reduced chi-squared =         0.7576 for     56 degrees of freedom 
# Null hypothesis probability =   9.097567e-01
 
Photon flux (15-150 keV)    in 174.3 sec: 0.215769 ( -0.01391  0.013915 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.77031e-06 ( -1.84671e-07  1.83876e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    0.220 sec. to    1.220 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.17889     ( -0.188327   0.194741 )
Norm@50keV  : 1.66312E-02    ( -0.00185211   0.00184041 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.59 using 59 PHA bins.
# Reduced chi-squared =          1.186 for     57 degrees of freedom 
# Null hypothesis probability =   1.592105e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.94657 ( -0.23138  0.23306 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.69774e-07 ( -1.89502e-08  1.89817e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.220 sec. to    1.220 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.932816     ( -0.411365   0.834577 )
Epeak [keV] : 254.531      ( -254.531 -254.531 )
Norm@50keV  : 2.13101E-02    ( -0.0079118   0.0259825 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          67.26 using 59 PHA bins.
# Reduced chi-squared =          1.201 for     56 degrees of freedom 
# Null hypothesis probability =   1.441080e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.92397 ( -0.24063  0.24197 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.68306e-07 ( -1.96577e-08  1.94959e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 164.344 sec.
Hardness ratio (energy fluence ratio) = 1.34818661628

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

S(15-50 keV)  = 1.1214828e-06
S(50-150 keV) = 1.6776171e-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 = -7.208451500834410E-01, IMY = -2.482760794484370E-02

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:
-239.112000 -8.752000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.6599 -62.7748    0.9  53.4    1.7  11.0447  12.3    0.3	GX 301-2                      
244.9752 -15.6435    0.3  27.8  100.5  18.7592  43.6    0.3	Sco X-1                       
255.9871 -37.8480    1.1   7.9   43.9   2.7467  10.8    0.2	4U 1700-377                   
256.4585 -36.4681    4.1   7.5   54.1   0.6896   2.8    2.9	GX 349+2                      
262.8383 -24.7094    8.3  11.9  134.7   0.3451   1.4    9.6	GX 1+4                        
264.4923 -44.4514    6.1   8.2  -25.9   0.4406   1.9   10.7	4U 1735-44                    
268.3704  -1.4587   22.5  35.0  152.2   0.2290   0.5    0.4	SW J1753.5-0127               
270.2600 -24.9910    2.9  12.0  167.7   0.9451   3.9    5.5	GX 5-1                        
270.2286 -25.7325    4.4  11.3  168.7   0.6397   2.6    4.0	GRS 1758-258                  
273.9861 -14.1953    8.4  23.4  168.2   0.3510   1.4    9.6	GX 17+2                       
275.9359 -30.2456    4.8  10.5 -155.1   0.6117   2.4    7.3	H1820-303                     
285.0482 -24.9167    3.5  20.1 -151.6   0.8230   3.3    0.7	HT1900.1-2455                 
288.7744  10.9877    4.2  52.1  176.8   2.1608   2.7    2.9	GRS 1915+105                  
262.9128 -33.8688    5.2   3.4  103.7  -0.4880  -2.2    4.3	GX 354-0                      
248.4980 -47.3751    0.8  16.9   11.5   3.7855  14.9 ------	UNKNOWN                       
303.8122 -14.8485    3.6  40.1 -144.7   1.1972   3.2 ------	UNKNOWN                       
313.3851 -14.2450    4.2  47.8 -137.1   2.1924   2.8 ------	UNKNOWN                       
315.0062 -50.7487    4.2  37.7  -84.0   2.1232   2.8 ------	UNKNOWN                       
323.1573 -64.3985    4.3  43.8  -64.1   3.5256   2.7 ------	UNKNOWN                       
317.0733 -19.0599    3.2  48.0 -129.1   4.2553   3.6 ------	UNKNOWN                       
317.9627 -29.1741    4.5  43.9 -116.1   3.3808   2.6 ------	UNKNOWN                       

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

Time interval of the image:
-8.752000 17.788600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
186.6304 -62.8068    3.8  53.4    1.7  -0.6305  -3.1    2.3	GX 301-2                      
244.9806 -15.6738    4.6  27.7  100.5   0.2644   2.5    2.0	Sco X-1                       
256.1851 -37.8858    9.9   7.8   43.5   0.0699   1.2    9.7	4U 1700-377                   
256.2104 -36.4129    6.4   7.7   54.4   0.1122   1.8   10.9	GX 349+2                      
263.1990 -24.7558    8.0  11.8  136.2   0.0880   1.4   10.4	GX 1+4                        
264.5432 -44.3961   12.3   8.1  -26.1  -0.0565  -0.9    9.1	4U 1735-44                    
268.3182  -1.5895    3.4  34.8  152.2  -0.3473  -3.4    8.7	SW J1753.5-0127               
270.2096 -24.9037   13.8  12.1  167.3  -0.0523  -0.8   11.3	GX 5-1                        
270.2444 -25.5405    0.0  11.5  168.4   0.0567   0.9   12.6	GRS 1758-258                  
273.9349 -13.9677   19.9  23.6  167.9  -0.0384  -0.6    5.8	GX 17+2                       
276.0344 -30.5102    7.9  10.4 -153.7   0.0867   1.4   10.3	H1820-303                     
285.0315 -24.9223   13.0  20.1 -151.6  -0.0512  -0.9    0.3	HT1900.1-2455                 
288.6746  10.9168    6.2  52.0  176.7  -0.3736  -1.9    7.5	GRS 1915+105                  
262.9135 -33.9729    7.4   3.3  102.5  -0.0954  -1.6    9.1	GX 354-0                      
263.4266  13.8357    2.2  50.2  144.7   1.7190   5.2 ------	UNKNOWN                       
283.0009  -4.2576    0.4  35.8  178.0   2.1499  25.9 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
88.988600 962.946300
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
244.9902 -15.6422    0.6  39.1   90.9  62.2163  20.0    0.6	Sco X-1                       
254.6130  35.3101    4.6  47.7  168.9  -4.0187  -2.5    7.9	Her X-1                       
255.9469 -37.7882    5.2  41.6   53.3   4.8908   2.2    3.8	4U 1700-377                   
256.5101 -36.3936    3.8  40.3   54.3   6.4059   3.0    4.0	GX 349+2                      
263.0065 -24.8193    4.1  28.1   61.7   2.6042   2.8    4.4	GX 1+4                        
264.8835 -44.3575    5.4  43.1   39.6   4.0519   2.1    8.2	4U 1735-44                    
268.4231  -1.4525    3.1  14.8  121.1   2.2514   3.8    3.3	SW J1753.5-0127               
270.2144 -25.1285    4.1  24.2   49.8   2.0967   2.8    4.8	GX 5-1                        
270.3377 -25.6821    3.2  24.6   48.9   2.8811   3.9    4.1	GRS 1758-258                  
274.0456 -14.1461    3.5  13.3   61.8   1.9032   3.3    7.0	GX 17+2                       
276.0309 -30.3741    3.8  26.9   34.0   2.1585   3.0    5.5	H1820-303                     
284.9224 -25.0415    8.5  20.9   15.7   0.8217   1.4    9.5	HT1900.1-2455                 
288.8135  10.9318    0.6  16.3 -138.7  11.7450  19.6    1.2	GRS 1915+105                  
299.5758  35.2054    0.8  42.4 -139.2  18.2812  14.6    0.7	Cyg X-1                       
263.1061 -33.6903 2171.5  34.8   50.4  -0.0059  -0.0   10.4	GX 354-0                      
286.7575  53.5928    3.9  57.9 -156.8  12.7890   3.0 ------	UNKNOWN                       
300.7652  48.7532    5.8  55.2 -145.3  10.3581   2.0 ------	UNKNOWN                       
310.8451  36.0527    3.8  48.0 -128.9   8.9128   3.0 ------	UNKNOWN