GRB151112A: 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: Sun Dec 13 15:59:54 EST 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger663179
======================================================================

  Trigger: 00663179      Segment: 000

  BAT Trigger Time: 469028703.488   [s; MET]
      Trigger Stop: 469028704   [s; MET]
               UTC: 2015-11-12T13:44:48.083580    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 2.04524472274834   Dec: -61.6924472596328  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    8.08
     Image Trigger?:     NO
     Rate S/N Ratio:     12.4899959967968  [ if not an image trigger ]
     Image S/N Ratio:    8.08

  Analysis Position:   [ source = BAT ]
    RA: 2.04524472274834   Dec: -61.6924472596328  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 2.05413113118576   Dec: -61.6686535388247  [deg; J2000]  
        { 00h 08m 13.0s , -61d 40' 07.2" }
         +/- 1.93693293752389 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.938569047715317 [arcmin] (formal 1-sigma fit error)
    SNR: 11.8291812983459
 
  Angular difference between the analysis and refined position is 1.449857 arcmin
 
  Partial Coding Fraction: 0.5234375    [ including projection effects ]

  Duration
     T90: 58.8640000224113 +/- 22.7254134084195
        Measured from: 0.336000025272369
                   to: 59.2000000476837     [s; relative to TRIGTIME]
     T50: 12.2240000367165 +/- 7.48352002972795
        Measured from: 3.82400000095367
                   to: 16.0480000376701     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.0119999647140503     
                   to: 0.98800003528595     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.0639999508857727     
                   to: 69.0240000486374     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.548395   0.566450   0.371345   0.146588
           0.060951   0.062630   0.054617   0.048462 [error]
 Peak      0.060782   0.079615   0.058336   0.008903
           0.008365   0.008938   0.007771   0.006103 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   69.088   -0.064   69.024
T90    58.864    0.336   59.200
T50    12.224    3.824   16.048
Peak    1.000   -0.012    0.988
 
 
====== 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)

#   RAcent    DECcent   POSerr    Theta     Phi              Peak Cts       SNR   Name
    2.0541   -61.6687   0.0162    35.9590   -38.2473         1.6418399     11.829 TRIG_00663179                 
 
Foreground time interval of the image:
 -0.064  69.024 (delta_t =  69.088 [sec])
Background time interval of the image:
-239.488  -0.064 (delta_t = 239.424 [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   -0.012 sec. to    0.988 sec.
Photon index:       (       )

Cutoff power-law model

Time interval is from   -0.012 sec. to    0.988 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

IMX = 5.697283094631234E-01, IMY = 4.490948199953240E-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:
-239.488000 -0.064000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 38.2522  -6.9890    2.1  40.6   71.3   3.8558   5.5 ------	UNKNOWN                       
 73.4591  -7.0346    2.6  39.9  126.7   2.3328   4.4 ------	UNKNOWN                       
 11.3604 -25.2023    2.8  41.3   22.4   1.3281   4.0 ------	UNKNOWN                       
106.0974 -27.7744    2.7  42.4 -175.3   1.1980   4.3 ------	UNKNOWN                       
342.6739 -31.0523    3.1  58.2   -3.7   4.3229   3.7 ------	UNKNOWN                       
 14.9085 -53.4893    2.7  28.7  -23.6   0.8289   4.3 ------	UNKNOWN                       
132.5091 -54.3277    2.7  48.0 -129.1   3.4966   4.2 ------	UNKNOWN                       

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

Time interval of the image:
-0.064000 69.024000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
 15.4746 -11.1946    2.3  48.4   40.4   1.9938   5.0 ------	UNKNOWN                       
 85.6790 -16.0006    2.5  37.2  150.5   0.7519   4.7 ------	UNKNOWN                       
  2.0541 -61.6687    1.0  36.0  -38.2   1.6416  11.8 ------	UNKNOWN                       
 20.2433 -69.4912    2.1  31.3  -55.9   0.6827   5.4 ------	UNKNOWN                       
108.5020 -81.1551    2.1  40.8  -90.2   2.0789   5.6 ------	UNKNOWN                       

Post-slew image of 15-350 keV band

Time interval of the image:
414.812600 427.412600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
188.2363  46.9224    2.8  33.1 -108.8   0.4412   4.1 ------	UNKNOWN                       
217.8339  51.7559    2.6  48.0 -129.0   1.2724   4.5 ------	UNKNOWN