GRB051012

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 GROUND-DETECTED GRB DATA PROCESSING REPORT                 
    Process Script Ver: batgrbproduct v2.46
    Process Start Time: Mon Apr 27 01:11:12 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/ground_detect_bursts/scripts
======================================================================

  Trigger: 00159413      Segment: 000

  BAT Trigger Time: 150829555.2
               UTC: 2005-10-12T17:05:55.421   [includes UTCF correction]
       Where From?: Ground analysis (best_duration.txt)
  NOTE: BAT trigger time for ground-detected burst is the T100 start time.
 
  Analysis Position:   [ source = GCN ]
    RA: 270.535   Dec: -52.783  [deg; J2000]
 
  Refined Position:   [ source = BAT pre-slew image ]
    RA: 270.535   Dec: -52.783  [deg; J2000]
        { 18h 02m 08.4s , -52d -46' -58.8" }
        +/- 1.60890323979 [arcmin] (estimated 90% radius based on SNR)
    SNR: 15.4217069405
 
 
  Angular difference between the analysis and refined position is 0.000000 arcmin
 
  Partial Coding Fraction: 1    [ including projection effects ]

  Duration
     T90: 12.8000000417233 +/- 1.6
        Measured from: 0
                   to: 12.8     [s; relative to TRIGTIME]
     T50: 6.40000000596046 +/- 1.6
        Measured from: 3.2
                   to: 9.6     [s; relative to TRIGTIME]
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   12.800    0.000   12.800
T90    12.800    0.000   12.800
T50     6.400    3.200    9.600
Peak    1.000    5.100    6.100
 
 
====== 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      -2.112    -0.209      0.197       -           -               -         2.28e-03     -3.19e-04          3.12e-04      72.940   57
CPL     -1.313    -0.853      1.097       34.223     -34.039        15.343      6.79e-03     -4.13e-03          2.40e-02      70.390   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      -2.184     -0.939     0.671       -           -               -         2.85e-03     -1.50e-03          1.26e-03      55.360   57
CPL     -2.160     -1.761     0.331       70.519     313.828       -70.519      2.56e-03     -2.56e-03          6.15e-04      55.160   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   6.66e-08  8.44e-08  7.81e-08  1.27e-07  2.72e-07  3.56e-07   erg/cm2
      90%_error_low -9.43e-09 -8.89e-09 -1.46e-08 -4.12e-08 -3.36e-08 -5.99e-08   erg/cm2
      90%_error_hi   9.65e-09  8.85e-09  1.51e-08  5.31e-08  3.45e-08  6.89e-08   erg/cm2
Peak flux       PL   2.27e-01  1.53e-01  6.73e-02  4.08e-02  4.68e-01  4.88e-01   ph/cm2/s
      90%_error_low -9.41e-02 -5.08e-02 -6.73e-02 -4.08e-02 -1.31e-01 -1.40e-01   ph/cm2/s
      90%_error_hi   9.96e-02  4.47e-02  4.50e-02  7.62e-02  1.31e-01  1.42e-01   ph/cm2/s
 
Fluence        CPL   6.26e-08  9.22e-08  7.28e-08  3.35e-08  2.50e-07  2.61e-07   erg/cm2
      90%_error_low -1.08e-08 -1.21e-08 -1.90e-08 -2.54e-08 -3.72e-08 -4.64e-08   erg/cm2
      90%_error_hi   1.07e-08  1.26e-08  1.76e-08  1.01e-07  4.07e-08  1.08e-07   erg/cm2
Peak flux      CPL     N/A      N/A      N/A      N/A      N/A      N/A     ph/cm2/s
      90%_error_low -9.41e-02 -5.08e-02 -6.73e-02 -4.08e-02 -1.31e-01 -1.40e-01   ph/cm2/s
      90%_error_hi   9.96e-02  4.47e-02  4.50e-02  7.62e-02  1.31e-01  1.42e-01   ph/cm2/s
 
======================================================================

Special notes of this burst

Image

15.0-350.0 keV image (Event data)

#RAcent DECcent POSerr Theta  Phi  Peak_Cts  SNR Name
270.535 -52.783 0.000 15.857 -171.404 0.560 15.422 TRIG_00159413
 
Image time interval: 0.000 to 12.800 [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.

Best duration plot

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   12.800 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.11221     ( -0.208839   0.196965 )
Norm@50keV  : 2.28483E-03    ( -0.000318597   0.000312091 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          72.94 using 59 PHA bins.
# Reduced chi-squared =          1.280 for     57 degrees of freedom 
# Null hypothesis probability =   7.580739e-02
 
Photon flux (15-150 keV)    in 12.8 sec: 0.361676 ( -0.037332  0.037342 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.72108e-07 ( -3.36287e-08  3.44557e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.000 sec. to   12.800 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.31272     ( -0.853341   1.09706 )
Epeak [keV] : 34.2231      ( -34.0391 15.3432 )
Norm@50keV  : 6.79450E-03    ( -0.00413481   0.024006 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          70.39 using 59 PHA bins.
# Reduced chi-squared =          1.257 for     56 degrees of freedom 
# Null hypothesis probability =   9.342887e-02
 
Photon flux (15-150 keV)    in 12.8 sec: 0.350196 ( -0.039136  0.039196 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.50098e-07 ( -3.71713e-08  4.07393e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    5.100 sec. to    6.100 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -2.18448     ( -0.938287   0.67181 )
Norm@50keV  : 2.84789E-03    ( -0.00150007   0.00125788 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          55.36 using 59 PHA bins.
# Reduced chi-squared =         0.9712 for     57 degrees of freedom 
# Null hypothesis probability =   5.368771e-01
 
Photon flux (15-150 keV)    in 1 sec: 0.467704 ( -0.131157  0.131152 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.67098e-08 ( -1.03703e-08  1.11127e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    5.100 sec. to    6.100 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -3.36728     ( -9.76996e-15   2.09181 )
Epeak [keV] : 378.821      ( -86.0263 -470.373 )
Norm@50keV  : 7.98464E-04    ( -0.000438827   0.00273737 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          53.27 using 59 PHA bins.
# Reduced chi-squared =         0.9513 for     56 degrees of freedom 
# Null hypothesis probability =   5.787769e-01
 
Photon flux (15-150 keV)    in 1 sec:  (    ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.05041e-08 ( 0  0 ) ergs/cm2

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 = -0.280860150765,

Spacecraft aspect plot

Bright

Event

 Time interval of the image: 2.800000 5.600600

# RAcent #  [deg] 244.8114 -15.7230 256.0780 -37.7163 256.4499 -36.5707 263.1703 -24.7281 264.6524 -44.3008 268.2404  -1.3613 270.2077 -25.2347 270.2479 -25.8971 273.8955 -14.1964 275.8093 -30.2286 285.1340 -24.9692 288.8988  10.9259 262.8079 -33.9317  172.7 270.6129 -52.7997 256.9290  17.2450

 Webpage updated on: Wed Nov 25 17:17:25 EST 2015

IMY = 0.0424581330712 source in the event data image

data image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 4.7 32.2 -50.8 0.0730 2.5 10.9 Sco X-1 8.3 12.7 -93.1 -0.0324 -1.4 8.8 4U 1700-377 18.7 12.5 -87.8 0.0143 0.6 8.9 GX 349+2 6.1 14.4 -29.3 0.0412 1.9 8.9 GX 1+4 6.2 9.2 -139.6 -0.0379 -1.9 9.8 4U 1735-44 5.3 35.8 -1.4 0.0614 2.2 9.4 SW J1753.5-0127 8.8 11.8 -3.2 -0.0288 -1.3 10.2 GX 5-1 6.0 11.2 -3.4 -0.0411 -1.9 9.7 GRS 1758-258 4.0 22.8 9.7 -0.0651 -2.9 11.5 GX 17+2 4.5 7.4 30.9 0.0503 2.5 10.2 H1820-303 9.3 16.4 51.7 0.0278 1.3 6.1 HT1900.1-2455 3.7 50.4 26.8 0.2774 3.1 6.0 GRS 1915+105 8.1 -65.8 0.0014 0.1 10.7 GX 354-0 1.9 15.9 -171.6 0.1308 6.2 ------ UNKNOWN 2.7 56.1 -12.4 0.3736 4.3 ------ UNKNOWN

Analysis Summary

Notes:

Image

15.0-350.0 keV image (Event data)

Light Curves

Best duration plot

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

Power-law model

Cutoff power-law model

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

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