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 15:37:02 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger213823
======================================================================
Trigger: 00213823 Segment: 000
BAT Trigger Time: 171349934.592 [s; MET]
Trigger Stop: 171349935.616 [s; MET]
UTC: 2006-06-07T05:12:13.351500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 329.711869958478 Dec: -22.5057942155925 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.77
Image Trigger?: NO
Rate S/N Ratio: 32.6190128606002 [ if not an image trigger ]
Image S/N Ratio: 14.77
Analysis Position: [ source = BAT ]
RA: 329.711869958478 Dec: -22.5057942155925 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 329.707777024863 Dec: -22.4962840417586 [deg; J2000]
{ 21h 58m 49.9s , -22d 29' 46.6" }
+/- 0.835024732101444 [arcmin] (estimated 90% radius based on SNR)
+/- 0.255878345470247 [arcmin] (formal 1-sigma fit error)
SNR: 39.3528751236418
Angular difference between the analysis and refined position is 0.614061 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 103.032000005245 +/- 28.06195686723
Measured from: -7.21200001239777
to: 95.8199999928474 [s; relative to TRIGTIME]
T50: 25.2439999878407 +/- 2.38332286908109
Measured from: 1.60400000214577
to: 26.8479999899864 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.967999994754791
to: 0.0320000052452087 [s; relative to TRIGTIME]
Total Fluence
Measured from: -23.6280000209808
to: 102.252000004053 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.065426 1.533541 1.190820 0.278994
0.050391 0.052550 0.046582 0.039896 [error]
Peak 0.035444 0.064478 0.060752 0.020808
0.004990 0.005590 0.005118 0.004126 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 125.880 -23.628 102.252
T90 103.032 -7.212 95.820
T50 25.244 1.604 26.848
Peak 1.000 -0.968 0.032
====== 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 -1.444 -0.073 0.073 - - - 2.13e-03 -8.50e-05 8.49e-05 43.580 57
CPL -1.147 -0.283 0.303 149.843 -50.709 1148.327 2.96e-03 -7.77e-04 1.15e-03 40.370 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 -1.078 -0.156 0.159 - - - 1.21e-02 -1.07e-03 1.07e-03 31.870 57
CPL -0.958 -0.264 0.565 485.583 -485.583 -485.583 1.38e-02 -2.65e-03 1.05e-02 31.890 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 3.25e-07 6.17e-07 9.08e-07 2.86e-06 2.57e-06 4.71e-06 erg/cm2
90%_error_low -2.39e-08 -2.70e-08 -4.64e-08 -3.14e-07 -1.12e-07 -3.46e-07 erg/cm2
90%_error_hi 2.45e-08 2.69e-08 4.63e-08 3.40e-07 1.13e-07 3.67e-07 erg/cm2
Peak flux PL 3.34e-01 4.32e-01 4.09e-01 6.86e-01 1.40e+00 1.86e+00 ph/cm2/s
90%_error_low -5.82e-02 -4.71e-02 -4.08e-02 -1.38e-01 -1.27e-01 -1.78e-01 ph/cm2/s
90%_error_hi 6.16e-02 4.63e-02 4.04e-02 1.59e-01 1.27e-01 1.82e-01 ph/cm2/s
Fluence CPL 3.05e-07 6.32e-07 9.25e-07 1.86e-06 2.51e-06 3.72e-06 erg/cm2
90%_error_low -2.95e-08 -3.06e-08 -5.01e-08 -5.93e-07 -1.27e-07 -6.02e-07 erg/cm2
90%_error_hi 3.01e-08 3.10e-08 5.07e-08 9.38e-07 1.26e-07 9.35e-07 erg/cm2
Peak flux CPL 3.39e-01 4.34e-01 4.12e-01 6.85e-01 1.40e+00 1.84e+00 ph/cm2/s
90%_error_low -8.48e-02 -4.83e-02 -4.24e-02 -3.40e-01 -1.31e-01 -3.54e-01 ph/cm2/s
90%_error_hi 4.44e-02 5.03e-02 4.96e-02 9.01e-02 1.29e-01 1.94e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 329.7078 -22.4963 0.0049 17.9464 -9.3044 2.3592734 39.353 TRIG_00213823 Foreground time interval of the image: -23.628 15.109 (delta_t = 38.737 [sec]) Background time interval of the image: -239.592 -23.628 (delta_t = 215.964 [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 -23.628 sec. to 102.252 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.44382 ( -0.0733218 0.0732599 ) Norm@50keV : 2.12799E-03 ( -8.49749e-05 8.49152e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.58 using 59 PHA bins. # Reduced chi-squared = 0.7646 for 57 degrees of freedom # Null hypothesis probability = 9.045238e-01 Photon flux (15-150 keV) in 125.9 sec: 0.261852 ( -0.010871 0.010891 ) ph/cm2/s Energy fluence (15-150 keV) : 2.567e-06 ( -1.12316e-07 1.1282e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -23.628 sec. to 102.252 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.14735 ( -0.282896 0.30272 ) Epeak [keV] : 149.843 ( -50.7091 1148.32 ) Norm@50keV : 2.95869E-03 ( -0.000776691 0.00114575 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 40.37 using 59 PHA bins. # Reduced chi-squared = 0.7209 for 56 degrees of freedom # Null hypothesis probability = 9.426960e-01 Photon flux (15-150 keV) in 125.9 sec: 0.257113 ( -0.011729 0.011738 ) ph/cm2/s Energy fluence (15-150 keV) : 2.5069e-06 ( -1.26628e-07 1.26255e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.968 sec. to 0.032 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.07759 ( -0.155819 0.158922 ) Norm@50keV : 1.21353E-02 ( -0.00107184 0.00107005 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 31.87 using 59 PHA bins. # Reduced chi-squared = 0.5591 for 57 degrees of freedom # Null hypothesis probability = 9.971518e-01 Photon flux (15-150 keV) in 1 sec: 1.40471 ( -0.12701 0.12727 ) ph/cm2/s Energy fluence (15-150 keV) : 1.27812e-07 ( -1.24481e-08 1.25405e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.968 sec. to 0.032 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.07236 ( -0.230559 0.59825 ) Epeak [keV] : 9995.70 ( -9994.78 -9994.78 ) Norm@50keV : 1.22030E-02 ( -0.00107225 0.0121089 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 31.87 using 59 PHA bins. # Reduced chi-squared = 0.5690 for 56 degrees of freedom # Null hypothesis probability = 9.961140e-01 Photon flux (15-150 keV) in 1 sec: 1.40205 ( -0.13121 0.12886 ) ph/cm2/s Energy fluence (15-150 keV) : 1.27359e-07 ( -1.30764e-08 1.28804e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 103.032 sec. Hardness ratio (energy fluence ratio) = 1.47041555626
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 9.417812e-07 S(50-150 keV) = 1.6252369e-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 = 3.196239141052718E-01, IMY = 5.236545093759146E-02
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: -239.592000 -23.628000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.7982 10.9099 3.3 37.3 130.7 1.2280 3.5 2.1 GRS 1915+105 299.5626 35.2038 1.0 46.5 168.0 4.0633 11.5 1.4 Cyg X-1 308.0766 40.9971 4.9 48.8 179.6 0.7166 2.3 3.1 Cyg X-3 325.9712 38.4338 10.1 44.6 -162.1 -0.3118 -1.1 11.6 Cyg X-2
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -23.628000 15.108600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.8520 10.9959 11.2 37.3 130.9 0.1362 1.0 4.4 GRS 1915+105 299.6126 35.2006 14.8 46.4 168.1 -0.1073 -0.8 1.1 Cyg X-1 308.0713 40.9830 4.2 48.8 179.6 -0.4010 -2.7 2.5 Cyg X-3 326.0079 38.3509 8.7 44.6 -162.0 0.1465 1.3 7.9 Cyg X-2 296.5371 9.8991 2.3 30.1 135.6 0.4307 4.9 ------ UNKNOWN 309.1658 -36.6919 2.2 32.9 33.2 0.5000 5.3 ------ UNKNOWN 329.7078 -22.4963 0.3 17.9 -9.3 2.3592 39.4 ------ UNKNOWN 341.7371 13.5561 2.8 27.6 -121.7 0.3081 4.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 54.508600 962.478700 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 359.4347 11.5653 3.6 44.8 -119.9 6.1565 3.2 ------ UNKNOWN