GRB111210A: 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 17:20:26 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger509419
======================================================================

  Trigger: 00509419      Segment: 000

  BAT Trigger Time: 345220630.848   [s; MET]
      Trigger Stop: 345220631.104   [s; MET]
               UTC: 2011-12-10T14:37:03.186460    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 191.488500995888   Dec: -7.16720076662529  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.85
     Image Trigger?:     NO
     Rate S/N Ratio:     30.9030742807249  [ if not an image trigger ]
     Image S/N Ratio:    10.85

  Analysis Position:   [ source = BAT ]
    RA: 191.488500995888   Dec: -7.16720076662529  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 191.494254955472   Dec: -7.17515560726301  [deg; J2000]  
        { 12h 45m 58.6s , -07d 10' 30.6" }
         +/- 1.70284786841092 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.671616952806751 [arcmin] (formal 1-sigma fit error)
    SNR: 14.2189381673482
 
  Angular difference between the analysis and refined position is 0.587484 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 2.51599991321564 +/- 0.132060610640776
        Measured from: -2.22399997711182
                   to: 0.291999936103821     [s; relative to TRIGTIME]
     T50: 2.1159999370575 +/- 0.0865332737249088
        Measured from: -1.99599999189377
                   to: 0.119999945163727     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -2.3299999833107     
                   to: -1.3299999833107     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -2.32800000905991     
                   to: 0.360000014305115     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.067685   0.093814   0.079659   0.022694
           0.009296   0.010056   0.008893   0.007543 [error]
 Peak      0.030802   0.051582   0.044249   0.011773
           0.005885   0.006429   0.005642   0.004648 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    2.688   -2.328    0.360
T90     2.516   -2.224    0.292
T50     2.116   -1.996    0.120
Peak    1.000   -2.330   -1.330
 
 
====== 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      -1.297    -0.194      0.194       -           -               -         6.17e-03     -6.92e-04          6.89e-04      61.140   57
CPL     -1.033    -0.433      0.833      186.076    -186.076      -186.076      8.37e-03     -3.55e-03          1.30e-02      60.750   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      -1.236     -0.227     0.229       -           -               -         8.70e-03     -1.17e-03          1.17e-03      68.520   57
CPL     -0.480     -0.853     1.289      103.409     -36.832      -103.409      2.05e-02     -1.25e-02          6.51e-02      66.870   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   1.75e-08  3.65e-08  5.94e-08  2.17e-07  1.64e-07  3.31e-07   erg/cm2
      90%_error_low -3.34e-09 -4.34e-09 -8.51e-09 -6.07e-08 -2.09e-08 -6.79e-08   erg/cm2
      90%_error_hi   3.50e-09  4.29e-09  8.44e-09  7.54e-08  2.12e-08  8.05e-08   erg/cm2
Peak flux       PL   2.78e-01  3.27e-01  2.78e-01  4.00e-01  1.03e+00  1.28e+00   ph/cm2/s
      90%_error_low -6.52e-02 -4.96e-02 -4.49e-02 -1.19e-01 -1.39e-01 -1.82e-01   ph/cm2/s
      90%_error_hi   6.98e-02  4.88e-02  4.43e-02  1.48e-01  1.39e-01  1.87e-01   ph/cm2/s
 
Fluence        CPL   1.68e-08  3.75e-08  6.05e-08  1.44e-07  1.61e-07  2.58e-07   erg/cm2
      90%_error_low -3.95e-09 -5.07e-09 -9.06e-09 -9.30e-08 -2.33e-08 -9.56e-08   erg/cm2
      90%_error_hi   3.65e-09  5.37e-09  9.32e-09  1.58e-07  2.31e-08  9.24e-08   erg/cm2
Peak flux      CPL   2.40e-01  3.49e-01  2.96e-01  1.84e-01  9.95e-01  1.07e+00   ph/cm2/s
      90%_error_low -8.09e-02 -5.84e-02 -5.17e-02 -1.16e-01 -1.47e-01 -1.95e-01   ph/cm2/s
      90%_error_hi   8.13e-02  6.16e-02  5.34e-02  2.65e-01  1.46e-01  3.10e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  191.4943    -7.1752   0.0136    10.1190   -48.1709         0.2632532     14.219 TRIG_00509419                 
 
Foreground time interval of the image:
 -2.328   0.360 (delta_t =   2.688 [sec])
Background time interval of the image:
-239.848  -2.328 (delta_t = 237.520 [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   -2.328 sec. to    0.360 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.29672     ( -0.193882   0.194316 )
Norm@50keV  : 6.17146E-03    ( -0.0006915   0.000689334 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.14 using 59 PHA bins.
# Reduced chi-squared =          1.073 for     57 degrees of freedom 
# Null hypothesis probability =   3.297087e-01
 
Photon flux (15-150 keV)    in 2.688 sec: 0.735836 ( -0.082071  0.082131 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.64078e-07 ( -2.09251e-08  2.11898e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -2.328 sec. to    0.360 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.03317     ( -0.432527   0.83299 )
Epeak [keV] : 186.076      ( -186.076 -186.076 )
Norm@50keV  : 8.37288E-03    ( -0.00354554   0.012993 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.75 using 59 PHA bins.
# Reduced chi-squared =          1.085 for     56 degrees of freedom 
# Null hypothesis probability =   3.086161e-01
 
Photon flux (15-150 keV)    in 2.688 sec: 0.727900 ( -0.085148  0.084865 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.60568e-07 ( -2.33065e-08  2.31191e-08 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   -2.330 sec. to   -1.330 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.23598     ( -0.227381   0.229384 )
Norm@50keV  : 8.69517E-03    ( -0.00116985   0.00116695 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.52 using 59 PHA bins.
# Reduced chi-squared =          1.202 for     57 degrees of freedom 
# Null hypothesis probability =   1.410398e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.02611 ( -0.139127  0.13931 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.73554e-08 ( -1.32141e-08  1.33818e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -2.330 sec. to   -1.330 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.480452     ( -0.853192   1.28895 )
Epeak [keV] : 103.409      ( -36.8302 -103.408 )
Norm@50keV  : 2.05064E-02    ( -0.0124899   0.0650615 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          66.87 using 59 PHA bins.
# Reduced chi-squared =          1.194 for     56 degrees of freedom 
# Null hypothesis probability =   1.515804e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.995346 ( -0.14691  0.145704 ) ph/cm2/s
Energy fluence (15-150 keV)             : 8.25277e-08 ( -1.49287e-08  1.49264e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 2.516 sec.
Hardness ratio (energy fluence ratio) = 1.62824533841

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

S(15-50 keV)  = 5.396643e-08
S(50-150 keV) = 1.1011363e-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 = 1.190234813146320E-01, IMY = 1.329845045493814E-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:
-239.848000 -2.328000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
180.3176  -6.8980    2.5  11.3   14.3   0.8486   4.7 ------	UNKNOWN                       
192.8264   6.6337    2.4   7.2 -153.3   0.8076   4.8 ------	UNKNOWN                       
210.2682 -44.2971    3.8  50.7  -44.7   3.1236   3.1 ------	UNKNOWN                       

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

Time interval of the image:
-2.328000 0.360000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
209.3342  52.2980    2.0  53.6  173.2   0.4292   5.8 ------	UNKNOWN                       
191.4942  -7.1752    0.8  10.1  -48.2   0.2633  14.2 ------	UNKNOWN                       
233.9461  35.0845    2.1  54.5 -156.4   0.3323   5.6 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
44.652590 962.210500
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
170.3003 -60.6236   16.1  55.8   -9.4   1.3699   0.7    0.5	Cen X-3                       
186.6688 -62.7692  297.2  55.7  -19.1   0.0792   0.0    0.3	GX 301-2                      
166.9109 -24.7469    2.2  29.3   28.6   3.4793   5.3 ------	UNKNOWN                       
208.4637  12.9108    2.5  26.2 -161.7   2.5006   4.7 ------	UNKNOWN                       
231.4221  38.8740    3.5  59.1 -166.1  13.4366   3.3 ------	UNKNOWN                       
221.9707 -13.3847    5.4  30.6  -97.6   1.7340   2.1 ------	UNKNOWN                       
214.3201 -58.0153    3.3  53.8  -36.5  11.0310   3.5 ------	UNKNOWN                       
220.5732 -51.8065    4.3  50.6  -44.7   8.6689   2.7 ------	UNKNOWN                       
235.1439  -2.1297    3.1  43.8 -116.2   8.9034   3.8 ------	UNKNOWN