GRB051109A

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: Sat May  9 19:48:33 EDT 2015
             Host Name: bat1
   Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger163136
======================================================================

  Trigger: 00163136      Segment: 000

  BAT Trigger Time: 153191540.352   [s; MET]
      Trigger Stop: 153191542.4   [s; MET]
               UTC: 2005-11-09T01:12:20.522800    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 330.295827113925   Dec: 40.8374744574041  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    11.47
     Image Trigger?:     NO
     Rate S/N Ratio:     20.0748598998847  [ if not an image trigger ]
     Image S/N Ratio:    11.47

  Analysis Position:   [ source = BAT ]
    RA: 330.295827113925   Dec: 40.8374744574041  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 330.320872746052   Dec: 40.8533809096347  [deg; J2000]  
        { 22h 01m 17.0s , +40d 51' 12.2" }
         +/- 2.08358661304973 [arcmin] (estimated 90% radius based on SNR)
         +/- 1.13874793405293 [arcmin] (formal 1-sigma fit error)
    SNR: 10.65794062544
 
  Angular difference between the analysis and refined position is 1.484297 arcmin
 
  Partial Coding Fraction: 0.08691406    [ including projection effects ]

  Duration
     T90: 37.1999999582767 +/- 6.0690849287056
        Measured from: -2.53599998354912
                   to: 34.6639999747276     [s; relative to TRIGTIME]
     T50: 22.255999982357 +/- 15.7304596505343
        Measured from: 0.23199999332428
                   to: 22.4879999756813     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: 0.684000015258789     
                   to: 1.68400001525879     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -3.71999999880791     
                   to: 40.5839999914169     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.592517   1.166720   0.987845   0.255585
           0.121490   0.127841   0.114944   0.102488 [error]
 Peak      0.079306   0.188749   0.152734   0.063425
           0.020935   0.025367   0.023284   0.017848 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100   44.304   -3.720   40.584
T90    37.200   -2.536   34.664
T50    22.256    0.232   22.488
Peak    1.000    0.684    1.684
 
 
====== 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      -1.503    -0.201      0.201       -           -               -         5.17e-03     -6.23e-04          6.22e-04      63.140   57
CPL     -0.760    -0.814      1.045       88.129     -23.420       -88.129      1.18e-02     -6.88e-03          2.49e-02      60.900   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      -1.448     -0.247     0.251       -           -               -         3.15e-02     -5.04e-03          5.04e-03      61.610   57
CPL     -0.583     -0.971     1.444       86.124      N/A           N/A         8.43e-02        N/A               N/A         59.890   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   2.93e-07  5.38e-07  7.59e-07  2.25e-06  2.17e-06  3.84e-06   erg/cm2
      90%_error_low -6.10e-08 -7.19e-08 -1.11e-07 -6.28e-07 -2.75e-07 -7.21e-07   erg/cm2
      90%_error_hi   6.50e-08  7.11e-08  1.09e-07  7.68e-07  2.76e-07  8.26e-07   erg/cm2
Peak flux       PL   1.23e+00  1.28e+00  9.38e-01  1.11e+00  3.88e+00  4.56e+00   ph/cm2/s
      90%_error_low -3.37e-01 -2.37e-01 -1.69e-01 -3.49e-01 -6.63e-01 -7.29e-01   ph/cm2/s
      90%_error_hi   3.63e-01  2.33e-01  1.67e-01  4.24e-01  6.66e-01  7.29e-01   ph/cm2/s
 
Fluence        CPL   2.53e-07  5.75e-07  8.10e-07  9.31e-07  2.09e-06  2.57e-06   erg/cm2
      90%_error_low -7.38e-08 -8.49e-08 -1.28e-07 -5.59e-07 -2.95e-07 -6.28e-07   erg/cm2
      90%_error_hi   7.82e-08  8.84e-08  1.32e-07  1.54e-06  2.93e-07  1.57e-06   erg/cm2
Peak flux      CPL   1.05e+00  1.40e+00  1.04e+00  5.21e-01  3.82e+00  4.01e+00   ph/cm2/s
      90%_error_low -3.92e-01 -2.86e-01 -2.15e-01 -3.32e-01 -6.66e-01 -7.58e-01   ph/cm2/s
      90%_error_hi   4.26e-01  3.04e-01  2.23e-01  7.39e-01  6.70e-01  9.81e-01   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
  330.3209    40.8534   0.0181    53.5886     7.3828         2.3774850     10.658 TRIG_00163136                 
 
Foreground time interval of the image:
 -3.720  24.749 (delta_t =  28.469 [sec])
Background time interval of the image:
-299.352  -3.720 (delta_t = 295.632 [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

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   -3.720 sec. to   40.584 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.50317     ( -0.201093   0.20101 )
Norm@50keV  : 5.16639E-03    ( -0.000622869   0.000622164 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          63.14 using 59 PHA bins.
# Reduced chi-squared =          1.108 for     57 degrees of freedom 
# Null hypothesis probability =   2.683504e-01
 
Photon flux (15-150 keV)    in 44.3 sec: 0.645536 ( -0.082717  0.083178 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.17032e-06 ( -2.74644e-07  2.75778e-07 ) ergs/cm2

Cutoff power-law model

Time interval is from   -3.720 sec. to   40.584 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.759767     ( -0.813631   1.04507 )
Epeak [keV] : 88.1289      ( -23.4198 -88.1289 )
Norm@50keV  : 1.18089E-02    ( -0.00688286   0.0248996 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          60.90 using 59 PHA bins.
# Reduced chi-squared =          1.087 for     56 degrees of freedom 
# Null hypothesis probability =   3.040677e-01
 
Photon flux (15-150 keV)    in 44.3 sec: 0.625515 ( -0.085702  0.086152 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.09375e-06 ( -2.95481e-07  2.92711e-07 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from    0.684 sec. to    1.684 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.44795     ( -0.246813   0.250857 )
Norm@50keV  : 3.14825E-02    ( -0.00503617   0.00503613 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          61.61 using 59 PHA bins.
# Reduced chi-squared =          1.081 for     57 degrees of freedom 
# Null hypothesis probability =   3.145481e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.87788 ( -0.6627  0.66573 ) ph/cm2/s
Energy fluence (15-150 keV)             : 3.01419e-07 ( -4.99873e-08  5.00686e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from    0.684 sec. to    1.684 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.58318     ( -0.971604   1.44412 )
Epeak [keV] : 86.1238      (   )
Norm@50keV  : 8.42936E-02    (     )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          59.89 using 59 PHA bins.
# Reduced chi-squared =          1.069 for     56 degrees of freedom 
# Null hypothesis probability =   3.364847e-01
 
Photon flux (15-150 keV)    in 1 sec: 3.82288 ( -0.66566  0.66962 ) ph/cm2/s
Energy fluence (15-150 keV)             : 2.94327e-07 ( -5.2653e-08  5.18195e-08 ) ergs/cm2

Time-resolved spectra

Distribution

T90 vs. Hardness ratio plot

T90                                   = 37.2 sec.
Hardness ratio (energy fluence ratio) = 1.41113904554

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

S(15-50 keV)  = 8.306873e-07
S(50-150 keV) = 1.3396608e-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 = 1.344559975624186E+00, IMY = -1.742180725927704E-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:
-299.352000 -3.720000
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.1699  38.3225   27.4  54.5    2.5  -0.2895  -0.4    0.1	Cyg X-2                       
 57.1551 -15.6675    2.6  51.6  150.7   4.1016   4.5 ------	UNKNOWN

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

Time interval of the image:
-3.720000 24.748600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
326.2365  38.3928    5.6  54.5    2.6   0.4526   2.1    5.2	Cyg X-2                       
330.3189  40.8508    1.1  53.6    7.4   2.4313  10.9 ------	UNKNOWN

Post-slew image of 15-350 keV band

Time interval of the image:
107.748590 211.548600
 
# RAcent  DECcent POSerr Theta    Phi  PeakCts   SNR AngSep     Name
#  [deg]    [deg]    ['] [deg]  [deg]                   [']
299.5792  35.2063    0.3  24.7  -90.3   5.0313  34.4    0.6	Cyg X-1                       
308.0899  40.9776    1.4  16.8  -79.4   0.9213   8.4    1.8	Cyg X-3                       
326.1195  38.4665    3.5   4.0 -122.1   0.3267   3.3    9.0	Cyg X-2                       
 27.8437  46.9138    2.5  40.9   64.4   1.6617   4.6 ------	UNKNOWN                       
313.4848  75.0351    3.5  35.0   -4.6   0.4375   3.3 ------	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

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 source in the pre-burst/pre-slew/post-slew images

Pre-burst image of 15-350 keV band

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

Post-slew image of 15-350 keV band

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