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: Mon Jan 13 18:51:39 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger506902
======================================================================
Trigger: 00506902 Segment: 000
BAT Trigger Time: 342009321.024 [s; MET]
Trigger Stop: 342009322.048 [s; MET]
UTC: 2011-11-03T10:35:13.489780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 327.121853512217 Dec: -10.5472597757318 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.23
Image Trigger?: NO
Rate S/N Ratio: 37.5765884561119 [ if not an image trigger ]
Image S/N Ratio: 12.23
Analysis Position: [ source = BAT ]
RA: 327.121853512217 Dec: -10.5472597757318 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 327.111159425537 Dec: -10.5323174969455 [deg; J2000]
{ 21h 48m 26.7s , -10d 31' 56.3" }
+/- 1.14170619401164 [arcmin] (estimated 90% radius based on SNR)
+/- 0.330791758220111 [arcmin] (formal 1-sigma fit error)
SNR: 25.1708493109033
Angular difference between the analysis and refined position is 1.096226 arcmin
Partial Coding Fraction: 0.3164062 [ including projection effects ]
Duration
T90: 11.6159999370575 +/- 0.449319487061713
Measured from: -0.015999972820282
to: 11.5999999642372 [s; relative to TRIGTIME]
T50: 7.04399996995926 +/- 2.1141391096008
Measured from: 1.11599999666214
to: 8.1599999666214 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 6.04000002145767
to: 7.04000002145767 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.416000008583069
to: 12.1399999856949 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.475862 0.772121 0.657359 0.205564
0.038958 0.041178 0.037433 0.031494 [error]
Peak 0.070147 0.157680 0.132102 0.040089
0.012154 0.014073 0.012459 0.010025 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 12.556 -0.416 12.140
T90 11.616 -0.016 11.600
T50 7.044 1.116 8.160
Peak 1.000 6.040 7.040
====== 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 -1.292 -0.101 0.102 - - - 1.13e-02 -6.59e-04 6.59e-04 65.160 57
CPL -0.928 -0.347 0.436 155.913 -57.779 -155.913 1.69e-02 -5.78e-03 1.01e-02 62.680 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 -1.184 -0.159 0.162 - - - 2.70e-02 -2.65e-03 2.65e-03 51.800 57
CPL -0.364 -0.690 0.826 106.161 -29.770 240.874 6.70e-02 -3.53e-02 9.50e-02 47.580 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 1.49e-07 3.10e-07 5.07e-07 1.87e-06 1.40e-06 2.83e-06 erg/cm2
90%_error_low -1.61e-08 -2.06e-08 -3.58e-08 -2.76e-07 -8.97e-08 -3.01e-07 erg/cm2
90%_error_hi 1.66e-08 2.04e-08 3.57e-08 3.08e-07 9.01e-08 3.28e-07 erg/cm2
Peak flux PL 8.22e-01 9.98e-01 8.79e-01 1.33e+00 3.16e+00 4.03e+00 ph/cm2/s
90%_error_low -1.47e-01 -1.16e-01 -9.74e-02 -2.79e-01 -3.20e-01 -4.13e-01 ph/cm2/s
90%_error_hi 1.55e-01 1.14e-01 9.66e-02 3.22e-01 3.21e-01 4.18e-01 ph/cm2/s
Fluence CPL 1.38e-07 3.21e-07 5.23e-07 1.12e-06 1.37e-06 2.10e-06 erg/cm2
90%_error_low -1.95e-08 -2.37e-08 -4.02e-08 -4.49e-07 -9.79e-08 -4.53e-07 erg/cm2
90%_error_hi 1.98e-08 2.42e-08 4.09e-08 7.31e-07 9.74e-08 7.45e-07 erg/cm2
Peak flux CPL 6.93e-01 1.07e+00 9.57e-01 6.12e-01 3.08e+00 3.33e+00 ph/cm2/s
90%_error_low -1.77e-01 -1.35e-01 -1.18e-01 -2.81e-01 -3.30e-01 -4.40e-01 ph/cm2/s
90%_error_hi 1.86e-01 1.39e-01 1.21e-01 5.55e-01 3.29e-01 5.99e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 327.1112 -10.5323 0.0076 31.5589 101.4708 2.2703735 25.171 TRIG_00506902 Foreground time interval of the image: -0.416 12.140 (delta_t = 12.556 [sec]) Background time interval of the image: -109.523 -0.416 (delta_t = 109.107 [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
- 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 -0.416 sec. to 12.140 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.29207 ( -0.101387 0.102096 ) Norm@50keV : 1.12661E-02 ( -0.000658653 0.000658625 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 65.16 using 59 PHA bins. # Reduced chi-squared = 1.143 for 57 degrees of freedom # Null hypothesis probability = 2.141087e-01 Photon flux (15-150 keV) in 12.56 sec: 1.34214 ( -0.08158 0.08171 ) ph/cm2/s Energy fluence (15-150 keV) : 1.40117e-06 ( -8.96946e-08 9.01131e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.416 sec. to 12.140 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.927809 ( -0.347129 0.435702 ) Epeak [keV] : 155.913 ( -57.7794 -155.913 ) Norm@50keV : 1.68791E-02 ( -0.00577492 0.0100619 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 62.68 using 59 PHA bins. # Reduced chi-squared = 1.119 for 56 degrees of freedom # Null hypothesis probability = 2.512991e-01 Photon flux (15-150 keV) in 12.56 sec: 1.32082 ( -0.08491 0.08487 ) ph/cm2/s Energy fluence (15-150 keV) : 1.36811e-06 ( -9.78885e-08 9.73686e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 6.040 sec. to 7.040 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.18388 ( -0.159007 0.161979 ) Norm@50keV : 2.70122E-02 ( -0.00265387 0.00265341 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.80 using 59 PHA bins. # Reduced chi-squared = 0.9087 for 57 degrees of freedom # Null hypothesis probability = 6.700499e-01 Photon flux (15-150 keV) in 1 sec: 3.16369 ( -0.3203 0.32088 ) ph/cm2/s Energy fluence (15-150 keV) : 2.7534e-07 ( -2.93372e-08 2.94846e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.040 sec. to 7.040 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.363833 ( -0.689633 0.825911 ) Epeak [keV] : 106.161 ( -29.7707 240.873 ) Norm@50keV : 6.70443E-02 ( -0.0352791 0.0949648 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.58 using 59 PHA bins. # Reduced chi-squared = 0.8496 for 56 degrees of freedom # Null hypothesis probability = 7.809998e-01 Photon flux (15-150 keV) in 1 sec: 3.08297 ( -0.32966 0.3292 ) ph/cm2/s Energy fluence (15-150 keV) : 2.62997e-07 ( -3.20087e-08 3.17979e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 11.616 sec. Hardness ratio (energy fluence ratio) = 1.63350287879
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.592213e-07 S(50-150 keV) = 9.419655e-07
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 = -1.221479280713655E-01, IMY = -6.019483966175959E-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: -109.523410 -0.416000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 256.0286 -37.8428 1.9 44.4 -126.5 2.5039 6.0 2.0 4U 1700-377 256.3973 -36.5433 7.6 43.5 -125.1 0.6125 1.5 7.4 GX 349+2 262.9086 -24.6077 18.6 33.6 -111.0 0.1405 0.6 9.9 GX 1+4 264.7843 -44.4043 4.7 42.8 -139.8 -0.6042 -2.4 3.3 4U 1735-44 268.5075 -1.2949 0.0 27.9 -64.4 0.3435 2.1 12.6 SW J1753.5-0127 270.2894 -25.0738 33.8 27.7 -117.1 -0.0610 -0.3 0.4 GX 5-1 270.4312 -25.6803 5.6 27.8 -118.4 0.3691 2.1 7.9 GRS 1758-258 273.9960 -13.9379 4.2 20.8 -93.7 0.4104 2.7 5.9 GX 17+2 276.0780 -30.2291 0.0 26.5 -132.9 0.1004 0.7 11.5 H1820-303 284.8929 -25.0719 5.2 17.5 -139.9 0.2700 2.2 12.0 HT1900.1-2455 288.7462 10.9220 1.5 22.2 -8.2 1.0099 7.4 3.4 GRS 1915+105 299.5151 35.1983 2.8 45.8 13.4 1.0906 4.1 3.7 Cyg X-1 308.0992 40.9510 5.9 52.8 20.7 1.3985 2.0 0.5 Cyg X-3 262.9563 -33.8506 5.2 37.5 -125.4 0.4934 2.2 1.9 GX 354-0 286.9479 -28.2535 2.5 19.4 -149.9 0.5787 4.5 ------ UNKNOWN 253.4890 -33.5908 2.1 44.5 -119.8 3.2272 5.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.416000 12.140000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 255.8143 -37.6688 0.0 44.5 -126.2 0.3337 2.3 13.3 4U 1700-377 256.6068 -36.4142 14.9 43.3 -125.0 0.1030 0.8 8.3 GX 349+2 263.0049 -24.7692 23.1 33.6 -111.3 0.0376 0.5 1.4 GX 1+4 264.6769 -44.4377 15.6 42.9 -139.8 0.0550 0.7 2.9 4U 1735-44 268.4718 -1.5342 4.9 27.8 -64.9 0.1292 2.4 7.9 SW J1753.5-0127 270.1615 -25.0744 8.5 27.8 -117.0 -0.0764 -1.4 6.7 GX 5-1 270.1480 -25.8732 0.0 28.1 -118.4 -0.0545 -1.0 11.4 GRS 1758-258 274.0592 -14.1738 5.6 20.8 -94.3 0.1039 2.1 8.8 GX 17+2 276.0190 -30.3589 6.7 26.6 -133.0 -0.0874 -1.7 4.9 H1820-303 284.8569 -24.7839 0.0 17.3 -139.2 -0.1095 -2.6 12.7 HT1900.1-2455 288.6923 10.8330 3.7 22.1 -8.4 -0.1357 -3.1 9.2 GRS 1915+105 299.4972 35.0492 0.0 45.6 13.4 -0.0930 -1.0 10.2 Cyg X-1 308.1814 40.9201 8.0 52.7 20.7 0.3979 1.4 3.8 Cyg X-3 262.9933 -33.9681 12.5 37.6 -125.6 -0.0700 -0.9 8.0 GX 354-0 332.5723 2.9673 2.3 39.7 80.6 1.0615 5.1 ------ UNKNOWN 327.1112 -10.5323 0.5 31.6 101.5 2.2704 25.2 ------ UNKNOWN 288.1263 40.0707 2.9 50.9 1.5 0.4696 3.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 337.876600 879.576600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.2951 35.3044 10.2 37.9 -45.0 -0.6954 -1.1 8.3 Her X-1 268.3731 -1.4536 26.6 34.3 -113.9 0.3046 0.4 0.3 SW J1753.5-0127 273.9533 -14.0508 3.2 40.7 -133.9 2.9441 3.6 3.2 GX 17+2 275.9283 -30.4129 12.2 54.7 -145.8 2.3949 0.9 2.8 H1820-303 285.0370 -24.9231 72.8 47.1 -153.7 0.1415 0.2 0.2 HT1900.1-2455 288.8046 10.9294 0.6 11.7 -136.2 7.6067 20.7 1.0 GRS 1915+105 299.5884 35.2026 1.7 14.6 30.6 2.5035 6.8 0.1 Cyg X-1 308.1119 40.9540 1.0 22.8 41.4 5.0351 11.8 0.1 Cyg X-3 325.9807 38.4679 46.1 31.9 64.7 -0.1716 -0.3 12.6 Cyg X-2 314.6646 -31.1004 2.7 55.8 173.6 8.1221 4.3 ------ UNKNOWN 274.4171 67.8611 2.4 48.3 4.3 3.7214 4.9 ------ UNKNOWN 277.4009 6.9777 2.7 21.9 -113.7 1.6301 4.3 ------ UNKNOWN 242.6634 48.1214 3.2 49.2 -29.6 2.9220 3.6 ------ UNKNOWN 287.7780 -37.1953 4.7 58.8 -159.2 7.6699 2.5 ------ UNKNOWN