GRB060919

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 13:36:45 EST 2014
             Host Name: batevent1
   Current Working Dir: /local/data/batevent/batevent_reproc/trigger230115
======================================================================

  Trigger: 00230115      Segment: 000

  BAT Trigger Time: 180344920.128   [s; MET]
      Trigger Stop: 180344921.152   [s; MET]
               UTC: 2006-09-19T07:48:38.674380    [includes UTCF correction] 
       Where From?: TDRSS position message

  BAT 
    RA: 276.91131212325   Dec: -51.0275372613452  [deg; J2000]

     Catalogged Source?: NO
     Point Source?:      YES
     GRB Indicated?:     YES    [ by BAT flight software ]
     Image S/N Ratio:    9.13
     Image Trigger?:     NO
     Rate S/N Ratio:     25.1594912508182  [ if not an image trigger ]
     Image S/N Ratio:    9.13

  Analysis Position:   [ source = BAT ]
    RA: 276.91131212325   Dec: -51.0275372613452  [deg; J2000]

  Refined Position:   [ source = BAT pre-slew burst ]
    RA: 276.902644615372   Dec: -50.9951488444862  [deg; J2000]  
        { 18h 27m 36.6s , -50d 59' 42.5" }
         +/- 1.73338956681534 [arcmin] (estimated 90% radius based on SNR)
         +/- 0.846436941337657 [arcmin] (formal 1-sigma fit error)
    SNR: 13.8623903950303
 
  Angular difference between the analysis and refined position is 1.970658 arcmin
 
  Partial Coding Fraction: 0.2929688    [ including projection effects ]

  Duration
     T90: 9.00000002980232 +/- 1.66506215465452
        Measured from: -0.708000004291534
                   to: 8.29200002551079     [s; relative to TRIGTIME]
     T50: 3.21999999880791 +/- 2.73818916804973
        Measured from: 0.0400000214576721
                   to: 3.26000002026558     [s; relative to TRIGTIME]



  Fluence
     Peak Flux  (peak 1 second)
        Measured from: -0.503999978303909     
                   to: 0.496000021696091     [s; relative to TRIGTIME]
     Total Fluence        
        Measured from: -0.919999986886978     
                   to: 9.02799999713898     [s; relative to TRIGTIME]
     
             Band 1     Band 2     Band 3     Band 4
              15-25      25-50     50-100    100-350     keV
 Total     0.331897   0.349259   0.219154   0.052721
           0.036669   0.033711   0.027664   0.022097 [error]
 Peak      0.054355   0.102812   0.099560   0.019207
           0.012291   0.012125   0.010940   0.007396 [error]

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

======================================================================
 
 
====== Table of the duration information =============================
 
        Value   tstart    tstop
T100    9.948   -0.920    9.028
T90     9.000   -0.708    8.292
T50     3.220    0.040    3.260
Peak    1.000   -0.504    0.496
 
 
====== 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      -1.826    -0.188      0.183       -           -               -         5.91e-03     -6.88e-04          6.79e-04      79.100   57
CPL     -0.841    -0.841      1.048       53.341     -10.890        48.802      2.02e-02     -2.02e-02          5.29e-02      75.000   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      -1.262     -0.196     0.199       -           -               -         1.94e-02     -2.36e-03          2.35e-03      46.620   57
CPL     -0.208     -0.891     1.128       95.238     -24.172       188.448      5.87e-02     -3.51e-02          1.22e-01      42.440   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   1.02e-07  1.54e-07  1.73e-07  3.72e-07  5.41e-07  8.01e-07   erg/cm2
      90%_error_low -1.65e-08 -1.64e-08 -2.66e-08 -1.05e-07 -6.31e-08 -1.33e-07   erg/cm2
      90%_error_hi   1.71e-08  1.64e-08  2.68e-08  1.29e-07  6.38e-08  1.51e-07   erg/cm2
Peak flux       PL   6.37e-01  7.39e-01  6.16e-01  8.66e-01  2.30e+00  2.86e+00   ph/cm2/s
      90%_error_low -1.42e-01 -1.08e-01 -8.22e-02 -2.15e-01 -2.95e-01 -3.49e-01   ph/cm2/s
      90%_error_hi   1.53e-01  1.07e-01  8.14e-02  2.54e-01  2.96e-01  3.50e-01   ph/cm2/s
 
Fluence        CPL   8.98e-08  1.71e-07  1.74e-07  9.88e-08  4.99e-07  5.33e-07   erg/cm2
      90%_error_low -2.00e-08 -2.17e-08 -3.15e-08 -6.39e-08 -6.92e-08 -9.53e-08   erg/cm2
      90%_error_hi   2.01e-08  2.26e-08  3.05e-08  1.95e-07  7.23e-08  2.01e-07   erg/cm2
Peak flux      CPL   4.90e-01  7.84e-01  6.93e-01  3.78e-01  2.21e+00  2.35e+00   ph/cm2/s
      90%_error_low -1.74e-01 -1.23e-01 -1.05e-01 -1.86e-01 -3.06e-01 -3.72e-01   ph/cm2/s
      90%_error_hi   1.91e-01  1.25e-01  1.09e-01  3.80e-01  3.07e-01  4.65e-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
  276.9026   -50.9951   0.0139    32.8743   112.5663         0.9236257     13.862 TRIG_00230115                 
 
Foreground time interval of the image:
 -0.920   9.028 (delta_t =   9.948 [sec])
Background time interval of the image:
-239.128  -0.920 (delta_t = 238.208 [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   -0.920 sec. to    9.028 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.82596     ( -0.187965   0.182925 )
Norm@50keV  : 5.90904E-03    ( -0.000687527   0.000678858 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          79.10 using 59 PHA bins.
# Reduced chi-squared =          1.388 for     57 degrees of freedom 
# Null hypothesis probability =   2.802135e-02
 
Photon flux (15-150 keV)    in 9.948 sec: 0.822637 ( -0.08917  0.089382 ) ph/cm2/s
Energy fluence (15-150 keV)             : 5.40836e-07 ( -6.31243e-08  6.38025e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.920 sec. to    9.028 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.84097     ( -0.841277   1.04804 )
Epeak [keV] : 53.3411      ( -10.8902 48.8024 )
Norm@50keV  : 2.01540E-02    ( -0.0201545   0.0529312 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          75.00 using 59 PHA bins.
# Reduced chi-squared =          1.339 for     56 degrees of freedom 
# Null hypothesis probability =   4.583622e-02
 
Photon flux (15-150 keV)    in 9.948 sec: 0.787372 ( -0.094597  0.094355 ) ph/cm2/s
Energy fluence (15-150 keV)             : 4.98616e-07 ( -6.91625e-08  7.2305e-08 ) ergs/cm2

1-s peak spectrum fit

Power-law model

Time interval is from   -0.504 sec. to    0.496 sec.
 
Spectral model in power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -1.26196     ( -0.196088   0.199393 )
Norm@50keV  : 1.94446E-02    ( -0.002356   0.00235403 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          46.62 using 59 PHA bins.
# Reduced chi-squared =         0.8178 for     57 degrees of freedom 
# Null hypothesis probability =   8.352867e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.30435 ( -0.29472  0.29626 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.94017e-07 ( -2.46144e-08  2.46987e-08 ) ergs/cm2

Cutoff power-law model

Time interval is from   -0.504 sec. to    0.496 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters  : value       lower 90%   higher 90%
Photon index: -0.208306     ( -0.891022   1.12828 )
Epeak [keV] : 95.2380      ( -24.1723 188.448 )
Norm@50keV  : 5.86716E-02    ( -0.0351319   0.121828 )
------------------------------------------------------------
#Fit statistic : Chi-Squared =          42.44 using 59 PHA bins.
# Reduced chi-squared =         0.7579 for     56 degrees of freedom 
# Null hypothesis probability =   9.095274e-01
 
Photon flux (15-150 keV)    in 1 sec: 2.20896 ( -0.30563  0.30741 ) ph/cm2/s
Energy fluence (15-150 keV)             : 1.86097e-07 ( -2.63767e-08  2.61492e-08 ) 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 = -2.480164407110524E-01,

Spacecraft aspect plot

Bright

Pre-burst

 Time interval of the image: -239.128000 -0.920000

# RAcent #  [deg] 170.3099 -60.6192 187.0259 -62.7554 244.9854 -15.6448 256.0048 -37.9199 256.3832 -36.4666 263.0364 -24.8037 264.7820 -44.5496 270.2896 -25.0748 270.4398 -25.6089 274.0979 -13.9172 275.7247 -30.2706 263.0788 -33.7997 255.2433 -41.6467 217.8669 -27.5919 230.7861  17.7967

Pre-slew

 Time interval of the image: -0.920000 9.028000

# RAcent #  [deg] 170.4283 -60.4473 186.5852 -62.6318 245.1204 -15.6547 255.9375 -37.9868 256.2470 -36.2790 263.1044 -24.7149 264.9299 -44.2996 270.1121 -25.0327 270.1647 -25.8774 273.9946 -13.9101 275.9292 -30.2802 262.8054 -33.7030 276.9027 -50.9952

Post-slew

 Time interval of the image: 71.172600 962.940000

# RAcent #  [deg] 186.9003 -62.6219 244.9826 -15.6327 256.1417 -38.0025 256.3927 -36.4136 262.9556 -24.7851 264.8623 -44.5397 268.3502  -1.5056 270.2707 -25.1049 270.2702 -25.7155 274.0035 -13.9889 275.9462 -30.3701 284.9121 -25.0301 263.0033 -33.8527 300.4530 -22.3823 286.8895 -10.6780 255.1552 -41.6185 250.1844 -53.7774 247.8439 -48.8228

IMY = -5.968109589008466E-01 source in the pre-burst/pre-slew/post-slew images

image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 36.4 44.0 -155.2 0.1203 0.3 0.3 Cen X-3 14.1 36.6 -160.5 0.2512 0.8 10.2 GX 301-2 0.2 25.2 13.6 12.3633 58.4 0.4 Sco X-1 3.9 17.9 81.0 0.6613 3.0 4.6 4U 1700-377 5.3 18.5 76.6 0.4875 2.2 3.6 GX 349+2 2.1 28.8 56.1 1.6586 5.4 3.8 GX 1+4 3.9 24.3 100.4 0.8501 3.0 6.2 4U 1735-44 7.2 34.1 63.7 0.6919 1.6 0.4 GX 5-1 0.0 33.9 64.6 0.0871 0.2 10.9 GRS 1758-258 25.8 43.7 53.0 0.3639 0.4 8.9 GX 17+2 12.4 35.8 75.7 0.5144 0.9 11.9 H1820-303 1.7 24.5 74.0 1.8723 6.7 4.9 GX 354-0 1.7 17.1 93.2 1.4171 6.6 ------ UNKNOWN 3.9 16.8 -67.8 0.6329 3.0 ------ UNKNOWN 2.6 56.4 -16.7 3.9752 4.5 ------ UNKNOWN background subtracted image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 11.8 44.0 -155.0 -0.0508 -1.0 11.1 Cen X-3 6.7 36.8 -160.2 0.0703 1.7 8.5 GX 301-2 7.6 25.2 13.9 -0.0530 -1.5 8.2 Sco X-1 8.1 17.9 81.1 -0.0551 -1.4 8.9 4U 1700-377 0.0 18.5 75.9 -0.0293 -0.8 12.6 GX 349+2 6.0 28.9 56.1 -0.0982 -1.9 5.5 GX 1+4 6.9 24.4 99.7 0.0847 1.7 12.1 4U 1735-44 4.2 33.9 63.4 0.2017 2.7 9.8 GX 5-1 0.0 33.5 64.8 0.1075 1.5 11.0 GRS 1758-258 3.7 43.6 52.9 -0.4567 -3.1 7.6 GX 17+2 8.6 35.9 75.8 -0.1262 -1.3 5.2 H1820-303 8.8 24.4 73.5 0.0602 1.3 12.1 GX 354-0 0.8 32.9 112.6 0.9238 13.9 ------ UNKNOWN image of 15-350 keV band DECcent POSerr Theta Phi PeakCts SNR AngSep Name [deg] ['] [deg] [deg] ['] 20.4 46.3 -133.4 -0.9654 -0.6 11.1 GX 301-2 0.3 43.6 -40.3 40.2191 38.4 0.5 Sco X-1 0.0 19.6 -49.2 0.4808 0.9 12.0 4U 1700-377 2.3 20.7 -45.8 2.6399 5.0 2.1 GX 349+2 2.0 28.3 -20.2 3.0484 5.9 3.8 GX 1+4 3.8 10.3 -48.7 1.5248 3.0 7.4 4U 1735-44 6.6 50.0 -4.0 1.9611 1.7 3.4 SW J1753.5-0127 1.4 26.4 -6.4 4.4454 8.1 1.7 GX 5-1 2.4 25.8 -6.6 2.5492 4.7 2.4 GRS 1758-258 4.2 37.1 2.5 1.7436 2.8 2.9 GX 17+2 1.8 20.6 4.9 3.2193 6.5 1.1 H1820-303 4.7 26.7 23.5 1.2804 2.5 9.4 HT1900.1-2455 1.3 19.9 -28.6 4.1285 8.8 1.3 GX 354-0 3.1 34.0 48.6 2.9721 3.7 ------ UNKNOWN 2.3 41.2 22.2 4.0132 4.9 ------ UNKNOWN 1.0 17.6 -59.1 5.9830 11.5 ------ UNKNOWN 1.8 16.4 -102.9 3.2508 6.4 ------ UNKNOWN 1.7 18.7 -87.5 3.7117 6.7 ------ 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

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