GRB061027

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: Wed Jan 22 12:23:46 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger235645
======================================================================

  Trigger: 00235645      Segment: 000

  BAT Trigger Time: 183636904   [s; MET]
      Trigger Stop: 183636968   [s; MET]
               UTC: 2006-10-27T10:15:02.467300    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 270.812052997813   Dec: -82.2277921845646  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    7.05
     Image Trigger?:     YES
     Rate S/N Ratio:     0  [ if not an image trigger ]
     Image S/N Ratio:    7.05

  Analysis Position:   [ source = BAT ]
    RA: 270.812052997813   Dec: -82.2277921845646  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 270.876072063455   Dec: -82.2402372749646  [deg; J2000]  
        { 18h 03m 30.3s , -82d 14' 24.9" }
         +/- 3.75758102512687 [arcmin] (estimated 90% radius based on SNR)
         +/- 3.15438887243402 [arcmin] (formal 1-sigma fit error)
    SNR: 4.59008503509723
 
  Angular difference between the analysis and refined position is 0.909382 arcmin
 
  Partial Coding Fraction: 0.6875    [ including projection effects ]

  Duration
     T90: N/A +/- N/A
        Measured from: N/A
                   to: N/A    [s; relative to TRIGTIME]
     T50: N/A +/- N/A
        Measured from: N/A
                   to: N/A    [s; relative to TRIGTIME]

    WARNING: battblocks failed.  Used TDRSS fore/background intervals

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100     N/A      N/A      N/A 
T90      N/A      N/A      N/A 
T50      N/A      N/A      N/A 
Peak     N/A      N/A      N/A 
 
 
====== 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      -1.883    -0.490      0.445       -           -               -         4.91e-04     -1.63e-04          1.59e-04      68.260   57
CPL      0.137    -2.045     -0.137       41.017      N/A           N/A         8.04e-03        N/A               N/A         65.410   56
 
 
=== 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   5.76e-08  8.37e-08  9.07e-08  1.84e-07  2.89e-07  4.16e-07   erg/cm2
      90%_error_low -2.13e-08 -2.37e-08 -3.75e-08 -1.14e-07 -9.21e-08 -1.68e-07   erg/cm2
      90%_error_hi   2.28e-08  2.37e-08  4.00e-08  1.98e-07  9.67e-08  2.32e-07   erg/cm2
Peak flux       PL     N/A      N/A      N/A      N/A      N/A      N/A     ph/cm2/s

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
  270.8761   -82.2402   0.0418    35.1733  -156.5944         0.4270291      4.590 TRIG_00235645                 
 
Foreground time interval of the image:
  0.000  64.000 (delta_t =  64.000 [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

Bokeh Plot

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    0.000 sec. to   64.000 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.88318     ( -0.487721   0.447071 )
Norm@50keV  : 4.90585E-04    ( -0.000163138   0.000159576 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          68.26 using 59 PHA bins.
# Reduced chi-squared =          1.198 for     57 degrees of freedom 
# Null hypothesis probability =   1.459750e-01
 
Photon flux (15-150 keV)    in 64 sec: 6.99154E-02 ( -0.019829  0.0198682 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.88543e-07 ( -9.2121e-08  9.67494e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to   64.000 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: 0.136743     ( -2.06573   -0.156986 )
Epeak [keV] : 41.0167      (   )
Norm@50keV  : 8.03600E-03    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          65.40 using 59 PHA bins.
# Reduced chi-squared =          1.168 for     56 degrees of freedom 
# Null hypothesis probability =   1.827714e-01
 
Photon flux (15-150 keV)    in 64 sec: 6.69766E-02 ( -0.0196665  0.0198033 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.40458e-07 ( -1.11903e-07  1.06303e-07 ) ergs/cm2

1-s peak spectrum fit

1-s peak spectrum unavailable, likely because there are no event data in the 1-s peak range.

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 = -6.467363073076796E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image:

Pre-slew

 Time interval of the image: 0.000000 64.000000

# RAcent #  [deg] 255.9710 -37.8211 256.4749 -36.3916 263.1358 -24.7329 264.4988 -44.5610 268.3600  -1.3855 270.3037 -24.9380 270.2530 -25.7221 274.0216 -14.0482 276.0183 -30.3905 285.1734 -25.0519 262.9899 -33.8346 83.1030 -73.4723 270.8740 -82.2401

Post-slew

 Time interval of the image: 131.300590 963.097200

# RAcent #  [deg] 135.4614 -40.5757 170.3430 -60.6189 186.7154 -62.6846 255.9229 -37.8339 256.6354 -36.4625 264.8617 -44.5510 270.2559 -25.0677 270.4469 -25.7347 275.7805 -30.3620 285.0039 -24.9281 263.1752 -33.8555 119.7339 -41.3429 121.8926 -39.8578 129.3318 -39.0830 270.5406 -53.9756 137.2527 -36.5415 159.8189 -37.8923

IMY = 2.799426606878527E-01 source in the pre-burst/pre-slew/post-slew images

image of 15-350 keV band background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 1.9 33.9 -72.4 0.9063 6.0 1.6 4U 1700-377 4.8 34.4 -69.8 0.3593 2.4 2.7 GX 349+2 2.8 37.8 -48.5 0.5508 4.1 7.0 GX 1+4 0.0 25.1 -78.6 0.1310 1.4 12.4 4U 1735-44 5.5 54.6 -24.6 0.5913 2.1 4.1 SW J1753.5-0127 199.9 33.5 -40.1 0.0059 0.1 8.5 GX 5-1 3.6 32.9 -41.1 0.3233 3.2 3.0 GRS 1758-258 4.5 40.8 -25.5 0.3110 2.6 1.2 GX 17+2 3.3 26.1 -39.0 0.3083 3.5 5.0 H1820-303 8.8 26.3 -16.9 0.1118 1.3 10.9 HT1900.1-2455 53.8 31.6 -60.2 0.0244 0.2 0.0 GX 354-0 2.5 55.5 -175.5 1.4336 4.6 ------ UNKNOWN 2.5 35.2 -156.6 0.4273 4.6 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 14.0 55.2 -168.4 1.2358 0.8 3.3 Vela X-1 8.4 31.7 -142.1 0.6992 1.4 0.8 Cen X-3 3.0 27.5 -128.1 1.8089 3.9 5.4 GX 301-2 2.1 44.7 -45.7 5.9861 5.6 3.1 4U 1700-377 7.8 46.0 -44.9 1.7557 1.5 9.9 GX 349+2 5.0 37.7 -35.9 1.3767 2.3 7.9 4U 1735-44 105.1 57.1 -29.6 0.2660 0.1 1.7 GX 5-1 8.6 56.5 -29.4 2.9330 1.3 7.8 GRS 1758-258 9.3 51.9 -23.5 1.2177 1.2 7.5 H1820-303 8.3 57.5 -13.7 2.5547 1.4 1.8 HT1900.1-2455 11.4 48.4 -37.5 1.1284 1.0 9.4 GX 354-0 2.9 55.6 177.2 9.3284 4.0 ------ UNKNOWN 4.4 56.9 179.3 8.4536 2.6 ------ UNKNOWN 5.1 57.2 -173.8 5.2296 2.3 ------ UNKNOWN 3.4 28.2 -29.3 1.2957 3.4 ------ UNKNOWN 3.3 59.0 -166.2 11.8306 3.5 ------ UNKNOWN 5.5 55.2 -145.2 6.6548 2.1 ------ UNKNOWN

Analysis Summary

Notes:

Image

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

Light Curves

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:

Time averaged spectrum fit using the average DRM

Power-law model

Cutoff power-law model

1-s peak spectrum fit

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

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

Mask shadow pattern

Spacecraft aspect plot

Bright

Pre-burst Time interval of the image:

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

Pre-burst
Time interval of the image: