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 14:29:02 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger223217
======================================================================
Trigger: 00223217 Segment: 000
BAT Trigger Time: 176654496.768 [s; MET]
Trigger Stop: 176654500.864 [s; MET]
UTC: 2006-08-07T14:41:35.402420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 252.527449283141 Dec: 31.5902332978161 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.05
Image Trigger?: NO
Rate S/N Ratio: 20.3715487874634 [ if not an image trigger ]
Image S/N Ratio: 11.05
Analysis Position: [ source = BAT ]
RA: 252.527449283141 Dec: 31.5902332978161 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 252.530714438917 Dec: 31.593016324021 [deg; J2000]
{ 16h 50m 07.4s , +31d 35' 34.9" }
+/- 1.86628400334677 [arcmin] (estimated 90% radius based on SNR)
+/- 0.662150663465845 [arcmin] (formal 1-sigma fit error)
SNR: 12.4740457352614
Angular difference between the analysis and refined position is 0.236073 arcmin
Partial Coding Fraction: 0.671875 [ including projection effects ]
Duration
T90: 54.0480000078678 +/- 11.6891501764668
Measured from: -32.8160000145435
to: 21.2319999933243 [s; relative to TRIGTIME]
T50: 17.4040000140667 +/- 6.69454853448861
Measured from: -10.7280000150204
to: 6.67599999904633 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.140000015497208
to: 0.859999984502792 [s; relative to TRIGTIME]
Total Fluence
Measured from: -40.772000014782
to: 25.7599999904633 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.340569 0.574275 0.365382 0.118061
0.050226 0.052071 0.046409 0.044820 [error]
Peak 0.021701 0.033885 0.035776 0.007759
0.006424 0.006796 0.006288 0.005707 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 66.532 -40.772 25.760
T90 54.048 -32.816 21.232
T50 17.404 -10.728 6.676
Peak 1.000 -0.140 0.860
====== 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 -1.537 -0.200 0.198 - - - 1.38e-03 -1.59e-04 1.57e-04 58.540 57
CPL -1.402 -0.330 0.885 208.661 -208.661 -208.661 1.62e-03 -7.35e-04 3.08e-03 58.460 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 -1.161 -0.332 0.342 - - - 7.06e-03 -1.33e-03 1.33e-03 36.110 57
CPL -0.534 -0.924 2.155 129.114 -129.114 -129.114 1.37e-02 -7.80e-03 1.07e-01 35.610 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 1.21e-07 2.17e-07 3.00e-07 8.59e-07 8.64e-07 1.50e-06 erg/cm2
90%_error_low -2.18e-08 -2.46e-08 -4.61e-08 -2.51e-07 -1.09e-07 -2.93e-07 erg/cm2
90%_error_hi 2.28e-08 2.44e-08 4.59e-08 3.16e-07 1.11e-07 3.47e-07 erg/cm2
Peak flux PL 2.10e-01 2.59e-01 2.31e-01 3.58e-01 8.24e-01 1.06e+00 ph/cm2/s
90%_error_low -7.33e-02 -5.94e-02 -5.04e-02 -1.42e-01 -1.60e-01 -2.10e-01 ph/cm2/s
90%_error_hi 8.30e-02 5.78e-02 4.95e-02 1.93e-01 1.61e-01 2.18e-01 ph/cm2/s
Fluence CPL 1.19e-07 2.21e-07 3.01e-07 6.86e-07 8.53e-07 1.33e-06 erg/cm2
90%_error_low -2.53e-08 -2.71e-08 -4.70e-08 -4.82e-07 -1.30e-07 -5.13e-07 erg/cm2
90%_error_hi 2.29e-08 3.22e-08 4.80e-08 2.31e-07 1.19e-07 2.66e-07 erg/cm2
Peak flux CPL 1.80e-01 2.68e-01 2.47e-01 1.97e-01 8.00e-01 8.92e-01 ph/cm2/s
90%_error_low -1.80e-01 -6.49e-02 -6.07e-02 -1.97e-01 -1.75e-01 -2.47e-01 ph/cm2/s
90%_error_hi 1.04e-01 6.78e-02 6.43e-02 2.11e-01 1.71e-01 2.77e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 252.5307 31.5930 0.0154 29.8132 160.1590 1.3961792 12.474 TRIG_00223217 Foreground time interval of the image: -40.772 25.760 (delta_t = 66.532 [sec]) Background time interval of the image: -239.768 -40.772 (delta_t = 198.996 [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 -40.772 sec. to 25.760 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.53657 ( -0.200001 0.197573 ) Norm@50keV : 1.37622E-03 ( -0.000158872 0.000157221 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 58.54 using 59 PHA bins. # Reduced chi-squared = 1.027 for 57 degrees of freedom # Null hypothesis probability = 4.187175e-01 Photon flux (15-150 keV) in 66.53 sec: 0.173557 ( -0.019191 0.019223 ) ph/cm2/s Energy fluence (15-150 keV) : 8.63746e-07 ( -1.08866e-07 1.1052e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -40.772 sec. to 25.760 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.40247 ( -0.325233 0.88962 ) Epeak [keV] : 208.661 ( -219.92 -219.92 ) Norm@50keV : 1.62071E-03 ( -0.000721013 0.00309857 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 58.46 using 59 PHA bins. # Reduced chi-squared = 1.044 for 56 degrees of freedom # Null hypothesis probability = 3.850530e-01 Photon flux (15-150 keV) in 66.53 sec: 0.172521 ( -0.020261 0.019959 ) ph/cm2/s Energy fluence (15-150 keV) : 8.52602e-07 ( -1.29886e-07 1.19222e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.140 sec. to 0.860 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.16059 ( -0.331962 0.341981 ) Norm@50keV : 7.05673E-03 ( -0.00133362 0.00133155 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 36.11 using 59 PHA bins. # Reduced chi-squared = 0.6334 for 57 degrees of freedom # Null hypothesis probability = 9.861228e-01 Photon flux (15-150 keV) in 1 sec: 0.824021 ( -0.160142 0.160831 ) ph/cm2/s Energy fluence (15-150 keV) : 7.24219e-08 ( -1.50169e-08 1.52096e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.140 sec. to 0.860 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.533757 ( -0.924486 2.15453 ) Epeak [keV] : 129.114 ( -128.985 -128.985 ) Norm@50keV : 1.37040E-02 ( -0.00781253 0.106636 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 35.61 using 59 PHA bins. # Reduced chi-squared = 0.6359 for 56 degrees of freedom # Null hypothesis probability = 9.847092e-01 Photon flux (15-150 keV) in 1 sec: 0.799702 ( -0.174835 0.17085 ) ph/cm2/s Energy fluence (15-150 keV) : 6.97349e-08 ( -1.68673e-08 1.64994e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 54.048 sec. Hardness ratio (energy fluence ratio) = 1.37885925333
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 3.384141e-07 S(50-150 keV) = 5.25353e-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 = -5.389973028856305E-01, IMY = -1.944870707172092E-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: -239.768000 -40.772000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3678 35.3088 4.6 25.8 160.1 0.5107 2.5 4.8 Her X-1 299.5944 35.2071 0.4 29.1 74.5 7.7860 28.0 0.4 Cyg X-1 308.0500 40.9792 2.9 28.2 56.1 0.9674 3.9 3.2 Cyg X-3 326.0224 38.4147 6.2 39.3 40.5 0.7142 1.9 9.0 Cyg X-2 308.0634 37.6373 0.5 30.8 60.4 7.2458 24.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -40.772000 25.760000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4563 35.5381 0.0 25.6 160.1 -0.1765 -1.6 11.7 Her X-1 299.4910 35.0682 4.8 29.2 74.7 -0.3471 -2.4 9.4 Cyg X-1 308.1142 40.9913 4.1 28.2 56.0 -0.3693 -2.8 2.3 Cyg X-3 325.9695 38.2541 5.2 39.4 40.7 -0.4427 -2.2 10.3 Cyg X-2 279.2647 25.7750 2.2 32.7 113.0 0.9339 5.4 ------ UNKNOWN 318.8759 49.3957 2.0 28.1 32.0 0.6394 5.8 ------ UNKNOWN 338.1975 49.0665 2.9 38.4 18.5 0.5614 4.0 ------ UNKNOWN 252.5307 31.5930 0.9 29.8 160.2 1.3963 12.5 ------ UNKNOWN 7.5275 75.4393 2.0 35.9 -30.3 0.6872 5.8 ------ UNKNOWN 14.6417 78.2925 2.1 36.0 -35.9 0.6305 5.4 ------ UNKNOWN 204.1519 58.2708 2.2 34.4 -115.4 0.7547 5.2 ------ UNKNOWN 203.4386 27.6232 2.4 55.9 -147.3 2.5808 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 90.532600 556.594700 557.232000 962.252000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9862 -15.6451 0.5 47.8 162.3 36.4466 24.5 0.5 Sco X-1 254.2710 35.3272 94.1 4.0 -6.4 -0.0601 -0.1 9.2 Her X-1 268.2242 -1.4748 7.4 36.3 125.3 1.9469 1.6 8.7 SW J1753.5-0127 288.8172 10.9567 2.7 39.3 86.0 9.2598 4.3 1.3 GRS 1915+105 299.5938 35.2035 0.4 39.1 44.1 32.0165 29.6 0.2 Cyg X-1 308.0541 40.9533 2.9 45.0 34.3 5.5950 4.0 2.5 Cyg X-3 308.0814 37.6435 0.6 45.5 38.9 28.3522 17.7 ------ UNKNOWN 268.6084 25.7615 2.6 15.3 81.0 2.1580 4.4 ------ UNKNOWN 265.2415 52.4874 3.1 22.8 -7.3 1.7203 3.7 ------ UNKNOWN