GRB111016A: 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 19:54:10 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger505646
======================================================================

  Trigger: 00505646      Segment: 000

  BAT Trigger Time: 340483032   [s; MET]
      Trigger Stop: 340483136   [s; MET]
               UTC: 2011-10-16T18:37:04.526260    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 153.806002279747   Dec: 27.4756888348294  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.49
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    8.49

  Analysis Position:   [ source = BAT ]
    RA: 153.806002279747   Dec: 27.4756888348294  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 153.83095171451   Dec: 27.4721872524119  [deg; J2000]  
        { 10h 15m 19.4s , +27d 28' 19.9" }
         +/- 2.14356334333729 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.798548999640606 [arcmin] (formal 1-sigma fit error)
    SNR: 10.2344967380459
 
  Angular difference between the analysis and refined position is 1.344654 arcmin
 
  Partial Coding Fraction: 0.640625    [ including projection effects ]

  Duration
     T90: 548.995999932289 +/- 107.373835482129
        Measured from: 46.5080000162125
                   to: 595.503999948502     [s; relative to TRIGTIME]
     T50: 106.419999957085 +/- 18.8295125644743
        Measured from: 118.407999992371
                   to: 224.827999949455     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 115.227999985218     
                   to: 116.227999985218     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: 35.444000005722     
                   to: 618.579999983311     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     2.808913   2.627221   1.626453   0.595114
           0.130893   0.136005   0.122629   0.112626 [error]
 Peak      0.031467   0.031904   0.038284   0.008484
           0.006906   0.007401   0.006592   0.005733 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  583.136   35.444  618.580
T90   548.996   46.508  595.504
T50   106.420  118.408  224.828
Peak    1.000  115.228  116.228
 
 
====== 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      -1.909    -0.121      0.118       -           -               -         7.28e-04     -5.13e-05          5.05e-05      43.500   57
CPL     -1.915    -0.230      0.219     9999.360      N/A           N/A         7.25e-04        N/A               N/A         43.510   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      -1.497     -0.346     0.332       -           -               -         7.21e-03     -1.46e-03          1.44e-03      47.880   57
CPL     -1.028     -1.375     1.654      109.903    -109.903      -109.903      1.22e-02        N/A               N/A         47.490   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   7.97e-07  1.14e-06  1.22e-06  2.40e-06  3.90e-06  5.56e-06   erg/cm2
      90%_error_low -7.41e-08 -6.62e-08 -1.20e-07 -4.61e-07 -2.68e-07 -5.79e-07   erg/cm2
      90%_error_hi   7.60e-08  6.62e-08  1.21e-07  5.33e-07  2.71e-07  6.35e-07   erg/cm2
Peak flux       PL   2.96e-01  2.98e-01  2.11e-01  2.38e-01  8.99e-01  1.04e+00   ph/cm2/s
      90%_error_low -9.20e-02 -6.14e-02 -5.40e-02 -1.04e-01 -1.76e-01 -2.06e-01   ph/cm2/s
      90%_error_hi   1.01e-01  6.05e-02  5.28e-02  1.41e-01  1.76e-01  2.08e-01   ph/cm2/s
 
Fluence        CPL   8.01e-07  1.12e-06  1.20e-06  2.88e-06  3.91e-06  5.89e-06   erg/cm2
      90%_error_low -1.10e-07 -1.50e-07 -7.02e-07 -1.29e-06 -4.05e-07 -1.20e-06   erg/cm2
      90%_error_hi   2.03e-07  9.64e-08  6.23e-08  -2.00e-07  1.83e-07  3.37e-07   erg/cm2
Peak flux      CPL   2.68e-01  3.10e-01  2.23e-01  1.51e-01  8.83e-01  9.52e-01   ph/cm2/s
      90%_error_low     N/A   -6.86e-02 -6.07e-02 -1.51e-01 -1.83e-01 -2.28e-01   ph/cm2/s
      90%_error_hi      N/A    7.24e-02  6.53e-02  1.06e-01  1.81e-01  2.75e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  153.8310    27.4722   0.0188    32.1492    15.4431         1.3166812     10.234 TRIG_00505646                 
 
Foreground time interval of the image:
 35.444 112.301 (delta_t =  76.857 [sec])
Background time interval of the image:
-656.599 -640.504 (delta_t =  16.095 [sec])
-239.000  35.444 (delta_t = 274.444 [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   35.444 sec. to  618.580 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.9094     ( -0.121234   0.118481 )
Norm@50keV  : 7.27698E-04    ( -5.12663e-05   5.05068e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          43.50 using 59 PHA bins.
# Reduced chi-squared =         0.7632 for     57 degrees of freedom 
# Null hypothesis probability =   9.060429e-01
 
Photon flux (15-150 keV)    in 583.1 sec: 0.104858 ( -0.0062114  0.006222 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90214e-06 ( -2.67654e-07  2.71e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   35.444 sec. to  618.580 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.08636     ( -0.0587717   0.390663 )
Epeak [keV] : 37.8974      (   )
Norm@50keV  : 5.88234E-04    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.79 using 59 PHA bins.
# Reduced chi-squared =         0.7641 for     56 degrees of freedom 
# Null hypothesis probability =   9.028596e-01
 
Photon flux (15-150 keV)    in 583.1 sec: 0.101588 ( -0.0103022  0.007981 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.90564e-06 ( -4.04557e-07  1.83223e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from  115.228 sec. to  116.228 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.49703     ( -0.346407   0.332414 )
Norm@50keV  : 7.20667E-03    ( -0.00145783   0.00143573 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.88 using 59 PHA bins.
# Reduced chi-squared =         0.8400 for     57 degrees of freedom 
# Null hypothesis probability =   7.998111e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.898980 ( -0.175722  0.17607 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.84085e-08 ( -1.50234e-08  1.52481e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  115.228 sec. to  116.228 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.02775     ( -1.37476   1.65476 )
Epeak [keV] : 109.903      ( -109.971 -109.971 )
Norm@50keV  : 1.21687E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.49 using 59 PHA bins.
# Reduced chi-squared =         0.8481 for     56 degrees of freedom 
# Null hypothesis probability =   7.836524e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.882790 ( -0.183256  0.18145 ) ph/cm2/s
Energy fluence (15-150 keV)             : 6.69854e-08 ( -1.54139e-08  1.6191e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 548.996 sec.
Hardness ratio (energy fluence ratio) = 1.06483046469

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

S(15-50 keV)  = 1.9387481e-06
S(50-150 keV) = 1.9633664e-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 = 6.058044271535602E-01, IMY = -1.673570671035416E-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:
-656.599400 -640.504200
-239.000000 35.444000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.3198  35.4735    0.0  50.5 -175.8   1.2264   2.3   10.4	Her X-1                       
243.8467  36.6259    2.6  42.1 -173.3   1.5046   4.4 ------	UNKNOWN                       

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

Time interval of the image:
35.444000 112.300610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
254.5223  35.4268    9.0  50.7 -175.9   0.2977   1.3    6.0	Her X-1                       
153.8310  27.4723    1.1  32.1   15.4   1.3111  10.2 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
167.500600 874.300610
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
132.8399  41.8165    2.7  22.4  104.1   2.0435   4.3 ------	UNKNOWN                       
130.4109  -7.4335    4.2  41.6    5.1   1.8066   2.7 ------	UNKNOWN                       
153.8405  27.4768    1.1   0.0 -177.0   4.3894  10.7 ------	UNKNOWN                       
148.2741  -9.1793    2.6  37.0  -22.2   2.4780   4.4 ------	UNKNOWN                       
227.6000  50.6073    4.0  59.1 -166.1   8.7126   2.9 ------	UNKNOWN                       
224.1566  42.7970    5.9  57.8 -156.6   5.7469   1.9 ------	UNKNOWN                       
167.3835 -19.4329    3.0  48.7  -48.4   7.8741   3.9 ------	UNKNOWN                       
176.1892 -10.5019    4.5  43.7  -64.1   5.8239   2.6 ------	UNKNOWN