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 23:13:56 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger103647
======================================================================
Trigger: 00103647 Segment: 000
BAT Trigger Time: 128259002.24 [s; MET]
Trigger Stop: 128259002.752 [s; MET]
UTC: 2005-01-24T11:30:02.876080 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 192.87863931207 Dec: 13.0264315169755 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 17
Image Trigger?: NO
Rate S/N Ratio: 42.2729227756965 [ if not an image trigger ]
Image S/N Ratio: 17
Analysis Position: [ source = BAT ]
RA: 192.87863931207 Dec: 13.0264315169755 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 192.875882681784 Dec: 13.0408194360131 [deg; J2000]
{ 12h 51m 30.2s , +13d 02' 26.9" }
+/- 0.905662046806876 [arcmin] (estimated 90% radius based on SNR)
+/- 0.308762029304607 [arcmin] (formal 1-sigma fit error)
SNR: 35.0425161666131
Angular difference between the analysis and refined position is 0.878185 arcmin
Partial Coding Fraction: 0.3007812 [ including projection effects ]
Duration
T90: 3.9360000193119 +/- 2.01171369047144
Measured from: -1.13199999928474
to: 2.80400002002716 [s; relative to TRIGTIME]
T50: 1.88400000333786 +/- 0.384187448567675
Measured from: 0.204000011086464
to: 2.08800001442432 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.096000000834465
to: 0.903999999165535 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.89599999785423
to: 3.06800000369549 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.388205 0.626275 0.573996 0.138226
0.028062 0.030724 0.027313 0.019497 [error]
Peak 0.121458 0.263133 0.230848 0.053804
0.012221 0.014354 0.013864 0.008869 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 6.964 -3.896 3.068
T90 3.936 -1.132 2.804
T50 1.884 0.204 2.088
Peak 1.000 -0.096 0.904
====== 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: CPL)
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 -1.410 -0.085 0.085 - - - 1.81e-02 -9.23e-04 9.23e-04 55.630 57
CPL -0.694 -0.370 0.403 100.174 -18.189 47.820 3.90e-02 -1.25e-02 2.03e-02 43.840 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: CPL)
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 -1.313 -0.096 0.096 - - - 4.88e-02 -3.02e-03 3.02e-03 78.420 57
CPL -0.281 -0.437 0.485 91.054 -13.899 28.152 1.50e-01 -5.54e-02 9.97e-02 60.060 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 1.48e-07 2.87e-07 4.32e-07 1.41e-06 1.22e-06 2.28e-06 erg/cm2
90%_error_low -1.37e-08 -1.66e-08 -2.59e-08 -1.74e-07 -6.52e-08 -1.93e-07 erg/cm2
90%_error_hi 1.41e-08 1.66e-08 2.58e-08 1.89e-07 6.54e-08 2.04e-07 erg/cm2
Peak flux PL 1.68e+00 1.89e+00 1.52e+00 2.04e+00 5.83e+00 7.12e+00 ph/cm2/s
90%_error_low -1.81e-01 -1.33e-01 -1.07e-01 -2.72e-01 -3.74e-01 -4.49e-01 ph/cm2/s
90%_error_hi 1.87e-01 1.32e-01 1.07e-01 2.94e-01 3.75e-01 4.50e-01 ph/cm2/s
Fluence CPL 1.26e-07 3.04e-07 4.65e-07 6.23e-07 1.18e-06 1.52e-06 erg/cm2
90%_error_low -1.69e-08 -1.93e-08 -3.12e-08 -1.92e-07 -6.89e-08 -1.99e-07 erg/cm2
90%_error_hi 1.74e-08 1.96e-08 3.16e-08 2.99e-07 6.87e-08 2.97e-07 erg/cm2
Peak flux CPL 1.34e+00 2.05e+00 1.72e+00 8.86e-01 5.68e+00 5.99e+00 ph/cm2/s
90%_error_low -2.16e-01 -1.57e-01 -1.37e-01 -2.51e-01 -3.79e-01 -4.57e-01 ph/cm2/s
90%_error_hi 2.25e-01 1.59e-01 1.40e-01 3.46e-01 3.80e-01 4.92e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 192.8759 13.0408 0.0055 43.6231 16.8663 1.8252572 35.043 TRIG_00103647 Foreground time interval of the image: -3.896 3.068 (delta_t = 6.964 [sec]) Background time interval of the image: -247.139 -3.896 (delta_t = 243.243 [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 -3.896 sec. to 3.068 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.41049 ( -0.0847294 0.0849033 ) Norm@50keV : 1.80959E-02 ( -0.000922653 0.000922652 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.63 using 59 PHA bins. # Reduced chi-squared = 0.9760 for 57 degrees of freedom # Null hypothesis probability = 5.264888e-01 Photon flux (15-150 keV) in 6.964 sec: 2.20909 ( -0.12045 0.12073 ) ph/cm2/s Energy fluence (15-150 keV) : 1.21526e-06 ( -6.52309e-08 6.53852e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.896 sec. to 3.068 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.693617 ( -0.369504 0.403418 ) Epeak [keV] : 100.174 ( -18.1893 47.8201 ) Norm@50keV : 3.90350E-02 ( -0.012499 0.0203288 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.84 using 59 PHA bins. # Reduced chi-squared = 0.7829 for 56 degrees of freedom # Null hypothesis probability = 8.810508e-01 Photon flux (15-150 keV) in 6.964 sec: 2.14080 ( -0.12502 0.12539 ) ph/cm2/s Energy fluence (15-150 keV) : 1.18007e-06 ( -6.89307e-08 6.87462e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.096 sec. to 0.904 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.31272 ( -0.096371 0.0964218 ) Norm@50keV : 4.87874E-02 ( -0.00301808 0.003018 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 78.42 using 59 PHA bins. # Reduced chi-squared = 1.376 for 57 degrees of freedom # Null hypothesis probability = 3.149402e-02 Photon flux (15-150 keV) in 1 sec: 5.83441 ( -0.37403 0.37452 ) ph/cm2/s Energy fluence (15-150 keV) : 4.80684e-07 ( -3.18559e-08 3.19531e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.096 sec. to 0.904 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.281032 ( -0.437056 0.48531 ) Epeak [keV] : 91.0542 ( -13.8988 28.1522 ) Norm@50keV : 0.149767 ( -0.0554464 0.0997169 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 60.06 using 59 PHA bins. # Reduced chi-squared = 1.073 for 56 degrees of freedom # Null hypothesis probability = 3.307577e-01 Photon flux (15-150 keV) in 1 sec: 5.67960 ( -0.37903 0.37963 ) ph/cm2/s Energy fluence (15-150 keV) : 4.65532e-07 ( -3.35059e-08 3.34444e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 3.936 sec. Hardness ratio (energy fluence ratio) = 1.52812900433
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.303443e-07 S(50-150 keV) = 7.497351e-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 = 9.120613952192284E-01, IMY = -2.765190724908820E-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: -247.139400 -3.896000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4970 35.1569 9.8 35.6 -84.6 0.5275 1.2 11.3 Her X-1 168.7449 65.5074 3.0 23.3 126.4 0.6618 3.9 ------ UNKNOWN 279.6693 64.7972 3.0 34.5 -144.4 0.7772 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -3.896000 3.068000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.2839 35.3620 7.6 35.4 -84.6 0.0840 1.5 8.6 Her X-1 104.7018 66.3484 2.3 47.2 139.4 0.5187 5.0 ------ UNKNOWN 192.8759 13.0408 0.3 43.6 16.9 1.8252 35.0 ------ UNKNOWN 23.7566 68.7176 2.5 56.9 174.1 0.7145 4.6 ------ UNKNOWN 259.0330 49.4821 2.1 29.5 -109.7 0.2063 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: -299.240000 302.840000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4458 35.1916 18.9 35.6 -84.6 0.6207 0.6 9.1 Her X-1 151.5641 49.0652 2.5 36.0 97.7 3.3146 4.7 ------ UNKNOWN