GRB101011A: 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: Fri Jan 17 15:43:22 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger436094
======================================================================

  Trigger: 00436094      Segment: 000

  BAT Trigger Time: 308509121.6   [s; MET]
      Trigger Stop: 308509122.624   [s; MET]
               UTC: 2010-10-11T16:58:35.338240    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 48.2984265172764   Dec: -65.9859644209653  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    6.65
     Image Trigger?:     NO
     Rate S/N Ratio:     24.7991935352745  [ if not an image trigger ]
     Image S/N Ratio:    6.65

  Analysis Position:   [ source = BAT ]
    RA: 48.2984265172764   Dec: -65.9859644209653  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 48.2852828611556   Dec: -65.989963225321  [deg; J2000]  
        { 03h 13m 08.5s , -65d 59' 23.9" }
         +/- 1.24735422319305 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.494052326765422 [arcmin] (formal 1-sigma fit error)
    SNR: 22.1814581302907
 
  Angular difference between the analysis and refined position is 0.400687 arcmin
 
  Partial Coding Fraction: 0.875    [ including projection effects ]

  Duration
     T90: 70.891999900341 +/- 18.643600613615
        Measured from: 0.38400000333786
                   to: 71.2759999036789     [s; relative to TRIGTIME]
     T50: 28.9079999923706 +/- 5.09016622077145
        Measured from: 4.32799994945526
                   to: 33.2359999418259     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.224000036716461     
                   to: 0.775999963283539     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.379999995231628     
                   to: 87.0719999670982     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.491277   0.710872   0.634676   0.290676
           0.050406   0.052072   0.047134   0.043235 [error]
 Peak      0.036096   0.066473   0.049111   0.015231
           0.006244   0.006647   0.006324   0.005628 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   87.452   -0.380   87.072
T90    70.892    0.384   71.276
T50    28.908    4.328   33.236
Peak    1.000   -0.224    0.776
 
 
====== 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      -1.234    -0.142      0.144       -           -               -         1.57e-03     -1.17e-04          1.17e-04      51.870   57
CPL     -1.232    -0.142      0.151     9999.360    -9999.360      -9999.360      1.57e-03     -1.17e-04          2.62e-04      51.920   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      -1.270     -0.192     0.194       -           -               -         1.13e-02     -1.32e-03          1.32e-03      56.710   57
CPL     -0.502     -0.818     1.063       95.331     -31.835       -95.331      2.82e-02     -1.72e-02          7.13e-02      54.200   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   1.36e-07  2.95e-07  5.02e-07  1.96e-06  1.38e-06  2.89e-06   erg/cm2
      90%_error_low -2.03e-08 -2.59e-08 -4.64e-08 -3.90e-07 -1.15e-07 -4.20e-07   erg/cm2
      90%_error_hi   2.12e-08  2.55e-08  4.59e-08  4.57e-07  1.16e-07  4.78e-07   erg/cm2
Peak flux       PL   3.73e-01  4.30e-01  3.57e-01  4.98e-01  1.34e+00  1.66e+00   ph/cm2/s
      90%_error_low -7.40e-02 -5.53e-02 -5.03e-02 -1.30e-01 -1.57e-01 -2.03e-01   ph/cm2/s
      90%_error_hi   7.81e-02  5.47e-02  4.99e-02  1.56e-01  1.57e-01  2.07e-01   ph/cm2/s
 
Fluence        CPL   1.40e-07  2.92e-07  4.95e-07  1.98e-06  1.39e-06  2.74e-06   erg/cm2
      90%_error_low -2.41e-08 -2.25e-08 -3.95e-08 -7.01e-07 -1.26e-07 -4.61e-07   erg/cm2
      90%_error_hi   1.74e-08  2.89e-08  5.30e-08  1.65e-07  1.06e-07  5.89e-07   erg/cm2
Peak flux      CPL   3.30e-01  4.66e-01  3.76e-01  2.12e-01  1.30e+00  1.38e+00   ph/cm2/s
      90%_error_low -8.65e-02 -6.82e-02 -5.68e-02 -1.30e-01 -1.64e-01 -2.13e-01   ph/cm2/s
      90%_error_hi   9.01e-02  7.25e-02  5.80e-02  3.25e-01  1.63e-01  3.34e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
   48.2853   -65.9900   0.0087    25.1184     2.6194         1.1231964     22.181 TRIG_00436094                 
 
Foreground time interval of the image:
 -0.380  18.701 (delta_t =  19.081 [sec])
Background time interval of the image:
-239.600  -0.380 (delta_t = 239.220 [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   -0.380 sec. to   87.072 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.23418     ( -0.142007   0.143858 )
Norm@50keV  : 1.56571E-03    ( -0.000116875   0.000116875 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.87 using 59 PHA bins.
# Reduced chi-squared =         0.9100 for     57 degrees of freedom 
# Null hypothesis probability =   6.673021e-01
 
Photon flux (15-150 keV)    in 87.45 sec: 0.184717 ( -0.014347  0.014402 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.37626e-06 ( -1.15103e-07  1.15913e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.380 sec. to   87.072 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.2317     ( -0.141564   0.150446 )
Epeak [keV] : 9999.36      ( -9999.36 -9999.36 )
Norm@50keV  : 1.57268E-03    ( -0.000117271   0.000261829 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          51.92 using 59 PHA bins.
# Reduced chi-squared =         0.9271 for     56 degrees of freedom 
# Null hypothesis probability =   6.300525e-01
 
Photon flux (15-150 keV)    in 87.45 sec: 0.184678 ( -0.014363  0.014389 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.38599e-06 ( -1.25583e-07  1.05571e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from   -0.224 sec. to    0.776 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.26971     ( -0.192364   0.193715 )
Norm@50keV  : 1.12958E-02    ( -0.00132048   0.00131826 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          56.71 using 59 PHA bins.
# Reduced chi-squared =         0.9949 for     57 degrees of freedom 
# Null hypothesis probability =   4.860121e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.34040 ( -0.15706  0.15719 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.12484e-07 ( -1.47805e-08  1.49543e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from   -0.224 sec. to    0.776 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.502472     ( -0.81784   1.06251 )
Epeak [keV] : 95.3305      ( -31.8112 -95.3071 )
Norm@50keV  : 2.81523E-02    ( -0.0171974   0.0712627 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          54.20 using 59 PHA bins.
# Reduced chi-squared =         0.9678 for     56 degrees of freedom 
# Null hypothesis probability =   5.434173e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.30242 ( -0.16398  0.1631 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.04894e-07 ( -1.75124e-08  1.72606e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 70.892 sec.
Hardness ratio (energy fluence ratio) = 1.70039602289

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

S(15-50 keV)  = 4.313186e-07
S(50-150 keV) = 9.449185e-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 = 4.683360674006261E-01, IMY = -2.142568939790490E-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:
-239.600000 -0.380000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5201 -40.5156    1.1  37.5 -112.4   4.4896  10.6    2.4	Vela X-1                      
 53.2018 -16.2062    3.0  40.4  102.2   2.8362   3.8 ------	UNKNOWN                       
 80.0402 -19.9951    2.3  28.5  143.8   1.1517   4.9 ------	UNKNOWN                       
 45.2319 -51.7653    2.5  24.2   37.3   0.9950   4.7 ------	UNKNOWN                       
328.3336 -68.0764    2.8  53.8   -5.6   2.2186   4.1 ------	UNKNOWN                       
183.7391 -73.3421    3.7  47.1  -53.1   3.0145   3.2 ------	UNKNOWN                       

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

Time interval of the image:
-0.380000 18.700580
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.5232 -40.5720    7.3  37.5 -112.3  -0.1578  -1.6    1.1	Vela X-1                      
 93.8144  -7.0829    2.5  42.4  165.6   0.3825   4.7 ------	UNKNOWN                       
 48.2853 -65.9900    0.5  25.1    2.6   1.1232  22.2 ------	UNKNOWN                       
115.7693  -4.8611    2.0  51.7 -167.0   0.6883   5.8 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
64.900620 962.483400
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
311.9089 -56.6581    3.3  42.4   -3.6   2.7820   3.5 ------	UNKNOWN                       
 19.3936 -73.3889    2.9  12.3  -17.1   1.9552   4.0 ------	UNKNOWN                       
293.6082 -51.8718    2.8  52.1  -12.4   5.2328   4.1 ------	UNKNOWN                       
133.8233 -45.1504    2.6  47.9 -129.0  10.2366   4.5 ------	UNKNOWN