GRB131105A: 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.

ADD SPECIAL NOTE BY HAND

======================================================================
                  BAT GRB EVENT DATA PROCESSING REPORT
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Thu Dec 17 13:45:22 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger576738
======================================================================

  Trigger: 00576738      Segment: 000

  BAT Trigger Time: 405309896   [s; MET]
      Trigger Stop: 405310104   [s; MET]
               UTC: 2013-11-05T02:04:44.765060    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 71.0114112270193   Dec: -62.9813396525796  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    10.83
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    10.83

  Analysis Position:   [ source = BAT ]
    RA: 71.0114112270193   Dec: -62.9813396525796  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 70.9732580011856   Dec: -63.0054671759475  [deg; J2000]  
        { 04h 43m 53.6s , -63d 00' 19.7" }
         +/- 1.58131326416527 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.52209546374017 [arcmin] (formal 1-sigma fit error)
    SNR: 15.8054576158567
 
  Angular difference between the analysis and refined position is 1.782209 arcmin
 
  Partial Coding Fraction: 0.07714844    [ including projection effects ]

  Duration
     T90: 112.208000063896 +/- 4.102307689173
        Measured from: 11.1919999718666
                   to: 123.400000035763     [s; relative to TRIGTIME]
     T50: 73.6960000395775 +/- 1.87445991275442
        Measured from: 41.8799999952316
                   to: 115.576000034809     [s; relative to TRIGTIME]

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100  118.544    6.792  125.336
T90   112.208   11.192  123.400
T50    73.696   41.880  115.576
Peak    1.000  116.636  117.636
 
 
====== 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: N/A)
 
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      N/A        N/A       N/A          -           -               -           N/A           N/A               N/A         N/A        N/A   
CPL     N/A        N/A        N/A          N/A         N/A           N/A           N/A           N/A               N/A         N/A        N/A   
 
 
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: N/A)
 
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      N/A         N/A       N/A          -           -               -           N/A           N/A               N/A         N/A        N/A   
CPL     N/A         N/A       N/A          N/A         N/A           N/A           N/A           N/A               N/A         N/A        N/A   
 
 
=== 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    N/A      N/A      N/A      N/A      N/A      N/A      erg/cm2

Special notes of this burst

Image

Pre-slew 15.0-350.0 keV image (Event data with DETECTION mask; bkg subtracted)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
   70.9731   -63.0055   0.0109    41.7525   -96.7177        11.3123445     17.650 TRIG_00576738                 
 
Foreground time interval of the image:
  6.792 125.336 (delta_t = 118.544 [sec])
Background time interval of the image:
-239.000   6.792 (delta_t = 245.792 [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

Multiple GTIs in the spectrum
tstart tstop
Photon index:       (       )

Cutoff power-law model

Multiple GTIs in the spectrum
tstart tstop
Photon index:       (       )

1-s peak spectrum fit

Power-law model

Time interval is from    0.000 sec. to  208.000 sec.
Photon index:       (       )

Cutoff power-law model

Time interval is from    0.000 sec. to  208.000 sec.
Photon index:       (       )

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = N/A sec.
Hardness ratio (energy fluence ratio) = N/A

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

S(15-50 keV)  = N/A
S(50-150 keV) = N/A

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 (with DETECTION mask)

IMX = 0, IMY = 0

Spacecraft aspect plot

Bright source in the event data image

Event data image of 15-350 keV band

Time interval of the image:
6.792000 125.336000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 93.9910  -5.2897    2.8  54.5 -179.8   1.6588   4.2 ------	UNKNOWN                       
 94.3927 -16.0578    2.0  50.3 -167.3   1.5389   5.6 ------	UNKNOWN                       
 81.2559 -51.0569    2.5  39.3 -116.7   1.3365   4.6 ------	UNKNOWN                       
 70.9731 -63.0055    0.7  41.8  -96.7  11.3123  17.3 ------	UNKNOWN                       

Webpage updated on:
Mon May 25 17:17:23 EDT 2015