GRB101030A: 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 15:16:03 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger437408
======================================================================

  Trigger: 00437408      Segment: 000

  BAT Trigger Time: 310146996.224   [s; MET]
      Trigger Stop: 310146997.248   [s; MET]
               UTC: 2010-10-30T15:56:29.902620    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 166.389847725746   Dec: -16.3867038690091  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.77
     Image Trigger?:     NO
     Rate S/N Ratio:     14.4913767461894  [ if not an image trigger ]
     Image S/N Ratio:    7.77

  Analysis Position:   [ source = BAT ]
    RA: 166.389847725746   Dec: -16.3867038690091  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 166.386661024606   Dec: -16.3831497705305  [deg; J2000]  
        { 11h 05m 32.8s , -16d 22' 59.3" }
         +/- 1.0044324866503 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.449160845088333 [arcmin] (formal 1-sigma fit error)
    SNR: 30.2255665672304
 
  Angular difference between the analysis and refined position is 0.281288 arcmin
 
  Partial Coding Fraction: 0.9609375    [ including projection effects ]

  Duration
     T90: 98.6719999909401 +/- 7.12244594937172
        Measured from: -66.8799999952316
                   to: 31.7919999957085     [s; relative to TRIGTIME]
     T50: 66.3839999437332 +/- 1.81542278213936
        Measured from: -56.1559999585152
                   to: 10.227999985218     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.224000036716461     
                   to: 1.22400003671646     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -73.5119999647141     
                   to: 50.7000000476837     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     1.801036   1.972926   1.275004   0.271792
           0.063448   0.065630   0.058011   0.050716 [error]
 Peak      0.044568   0.047626   0.040005  -0.001944
           0.005772   0.006136   0.005557   0.004645 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  124.212  -73.512   50.700
T90    98.672  -66.880   31.792
T50    66.384  -56.156   10.228
Peak    1.000    0.224    1.224
 
 
====== 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      -1.747    -0.083      0.082       -           -               -         2.61e-03     -1.13e-04          1.13e-04      47.880   57
CPL     -1.748    -0.081      0.084     9999.360    -9999.350      -9999.360      2.61e-03     -4.42e-04          9.94e-04      47.890   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      -1.708     -0.243     0.231       -           -               -         8.14e-03     -1.25e-03          1.21e-03      41.380   57
CPL     -1.454     -0.763     0.906       98.365     -73.283       -98.365      1.12e-02     -6.79e-03          2.29e-02      41.070   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   5.21e-07  8.24e-07  9.82e-07  2.28e-06  2.99e-06  4.60e-06   erg/cm2
      90%_error_low -3.80e-08 -3.47e-08 -5.93e-08 -2.89e-07 -1.35e-07 -3.34e-07   erg/cm2
      90%_error_hi   3.90e-08  3.47e-08  5.93e-08  3.17e-07  1.36e-07  3.56e-07   erg/cm2
Peak flux       PL   4.09e-01  3.64e-01  2.23e-01  2.07e-01  1.08e+00  1.20e+00   ph/cm2/s
      90%_error_low -7.78e-02 -4.67e-02 -4.47e-02 -7.14e-02 -1.39e-01 -1.60e-01   ph/cm2/s
      90%_error_hi   8.09e-02  4.66e-02  4.48e-02  9.12e-02  1.39e-01  1.62e-01   ph/cm2/s
 
Fluence        CPL   5.21e-07  8.23e-07  9.81e-07  2.27e-06  2.99e-06  4.68e-06   erg/cm2
      90%_error_low -3.80e-08 -3.47e-08 -6.43e-08    N/A    -1.72e-07 -9.31e-07   erg/cm2
      90%_error_hi   3.90e-08  3.84e-08  6.65e-08    N/A     1.38e-07  1.86e-08   erg/cm2
Peak flux      CPL   3.97e-01  3.75e-01  2.26e-01  1.47e-01  1.07e+00  1.14e+00   ph/cm2/s
      90%_error_low -8.91e-02 -5.50e-02 -4.64e-02 -1.47e-01 -1.42e-01 -1.81e-01   ph/cm2/s
      90%_error_hi   8.88e-02  5.91e-02  4.78e-02  8.21e-02  1.42e-01  1.69e-01   ph/cm2/s
 
======================================================================

Image

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

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
  166.3867   -16.3831   0.0064    12.9326   -56.6631         2.1254784     30.226 TRIG_00437408                 
 
Foreground time interval of the image:
-31.923  13.277 (delta_t =  45.200 [sec])
Background time interval of the image:

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  -73.512 sec. to   50.700 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.74719     ( -0.0826476   0.0817512 )
Norm@50keV  : 2.60539E-03    ( -0.000113203   0.000112589 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.88 using 59 PHA bins.
# Reduced chi-squared =         0.8401 for     57 degrees of freedom 
# Null hypothesis probability =   7.997619e-01
 
Photon flux (15-150 keV)    in 124.2 sec: 0.351945 ( -0.015088  0.015152 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.98684e-06 ( -1.34823e-07  1.35585e-07 ) ergs/cm2
 

Cutoff power-law model

Time interval is from  -73.512 sec. to   50.700 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.74758     ( -0.081952   0.0832323 )
Epeak [keV] : 9999.36      ( -9999.35 -9999.36 )
Norm@50keV  : 2.60762E-03    ( -0.000442963   0.000993379 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          47.89 using 59 PHA bins.
# Reduced chi-squared =         0.8551 for     56 degrees of freedom 
# Null hypothesis probability =   7.713439e-01
 
Photon flux (15-150 keV)    in 124.2 sec: 0.352581 ( -0.017846  0.015218 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.99379e-06 ( -1.71827e-07  1.37775e-07 ) ergs/cm2
 

1-s peak spectrum fit

Power-law model

Time interval is from    0.224 sec. to    1.224 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.70775     ( -0.243477   0.230647 )
Norm@50keV  : 8.14468E-03    ( -0.00124798   0.00121308 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.38 using 59 PHA bins.
# Reduced chi-squared =         0.7259 for     57 degrees of freedom 
# Null hypothesis probability =   9.405718e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.08470 ( -0.138582  0.13858 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.53755e-08 ( -1.19637e-08  1.2266e-08 ) ergs/cm2
 

Cutoff power-law model

Time interval is from    0.224 sec. to    1.224 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.45387     ( -0.762595   0.905974 )
Epeak [keV] : 98.3655      ( -73.366 -98.4484 )
Norm@50keV  : 1.12142E-02    ( -0.00678702   0.0229021 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          41.07 using 59 PHA bins.
# Reduced chi-squared =         0.7334 for     56 degrees of freedom 
# Null hypothesis probability =   9.325756e-01
 
Photon flux (15-150 keV)    in 1 sec: 1.07476 ( -0.141762  0.14175 ) ph/cm2/s
Energy fluence (15-150 keV)             : 7.36377e-08 ( -1.29724e-08  1.32924e-08 ) ergs/cm2
 

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 98.672 sec.
Hardness ratio (energy fluence ratio) = 1.19157129733

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

S(15-50 keV)  = 1.3454317e-06
S(50-150 keV) = 1.6413816e-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 = 1.261951849153893E-01, IMY = 1.918444380881048E-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:
 

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

Time interval of the image:
-31.923410 13.276600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.3933 -40.6660  100.0  40.4    6.6  -0.0134  -0.1    9.1	Vela X-1                      
170.0855 -60.6187   12.3  55.3  -27.7   0.3262   0.9    6.8	Cen X-3                       
136.4918  26.4980    2.3  38.9  126.8   0.9119   4.9 ------	UNKNOWN                       
153.3501  45.5629    2.7  51.8  154.5   1.6464   4.3 ------	UNKNOWN                       
175.4026  36.3811    2.3  45.2  178.4   0.6881   5.0 ------	UNKNOWN                       
165.3525   2.6914    2.4  11.0 -162.5   0.3209   4.8 ------	UNKNOWN                       
166.3866 -16.3831    0.4  12.9  -56.7   2.1258  30.2 ------	UNKNOWN                       
199.4416  39.6660    2.3  59.2 -164.9   2.4683   5.0 ------	UNKNOWN                       
194.5537 -31.7692    3.0  42.4  -68.7   1.2461   3.9 ------	UNKNOWN                       
204.3476   9.9488    2.4  48.3 -129.8   1.5592   4.8 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
53.876590 962.796800
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
135.4955 -40.4740    4.0  36.0   38.1   2.7283   2.9    5.1	Vela X-1                      
170.2732 -60.6380    1.6  44.3   -6.3   6.9769   7.0    1.5	Cen X-3                       
186.5337 -62.6566    5.3  48.4  -15.8   2.4287   2.2    7.6	GX 301-2                      
130.3103 -31.6040    2.3  36.1   54.8   5.3402   5.1 ------	UNKNOWN                       
167.4604 -51.3683    3.4  35.0   -4.8   2.5055   3.4 ------	UNKNOWN                       
182.2545  37.9626    3.4  56.4 -168.6   8.4750   3.4 ------	UNKNOWN