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 15:00:45 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger219646
======================================================================
Trigger: 00219646 Segment: 000
BAT Trigger Time: 174820060.224 [s; MET]
Trigger Stop: 174820062.272 [s; MET]
UTC: 2006-07-17T09:07:38.901820 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 170.861533651496 Dec: 28.948397280501 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.68
Image Trigger?: NO
Rate S/N Ratio: 9.69535971483266 [ if not an image trigger ]
Image S/N Ratio: 6.68
Analysis Position: [ source = BAT ]
RA: 170.861533651496 Dec: 28.948397280501 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 170.854594433506 Dec: 28.9691754053938 [deg; J2000]
{ 11h 23m 25.1s , +28d 58' 09.0" }
+/- 2.65714800276093 [arcmin] (estimated 90% radius based on SNR)
+/- 1.11297727886839 [arcmin] (formal 1-sigma fit error)
SNR: 7.53026348553565
Angular difference between the analysis and refined position is 1.298823 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 3 +/- 1.4142135623731
Measured from: -0.224000006914139
to: 2.77599999308586 [s; relative to TRIGTIME]
T50: 1 +/- 1
Measured from: 0.775999993085861
to: 1.77599999308586 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.775999993085861
to: 1.77599999308586 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.224000006914139
to: 2.77599999308586 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.034285 0.050494 0.025383 0.007566
0.008027 0.008312 0.007362 0.006511 [error]
Peak 0.021089 0.029426 0.012590 0.002860
0.004676 0.004915 0.004325 0.003790 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 3.000 -0.224 2.776
T90 3.000 -0.224 2.776
T50 1.000 0.776 1.776
Peak 1.000 0.776 1.776
====== 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 -1.663 -0.362 0.340 - - - 2.36e-03 -5.47e-04 5.31e-04 71.200 57
CPL -0.406 -1.706 2.767 53.938 -12.306 -53.938 1.22e-02 -1.22e-02 4.81e-01 69.650 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 -1.862 -0.368 0.330 - - - 3.65e-03 -9.55e-04 9.31e-04 68.990 57
CPL 0.865 -1.855 2.881 43.638 -8.489 13.639 1.34e-01 -1.34e-01 5.21e+00 61.890 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 1.05e-08 1.75e-08 2.21e-08 5.58e-08 6.58e-08 1.06e-07 erg/cm2
90%_error_low -2.99e-09 -3.50e-09 -6.70e-09 -2.78e-08 -1.58e-08 -3.57e-08 erg/cm2
90%_error_hi 3.14e-09 3.49e-09 6.84e-09 4.19e-08 1.64e-08 4.74e-08 erg/cm2
Peak flux PL 2.13e-01 1.73e-01 9.52e-02 7.69e-02 5.16e-01 5.58e-01 ph/cm2/s
90%_error_low -5.73e-02 -3.64e-02 -3.08e-02 -3.83e-02 -1.08e-01 -1.20e-01 ph/cm2/s
90%_error_hi 5.99e-02 3.64e-02 3.20e-02 5.53e-02 1.08e-01 1.22e-01 ph/cm2/s
Fluence CPL 9.39e-09 2.04e-08 2.11e-08 9.14e-09 5.75e-08 6.00e-08 erg/cm2
90%_error_low -3.61e-09 -5.14e-09 -9.44e-09 -8.59e-09 -1.63e-08 -1.88e-08 erg/cm2
90%_error_hi 3.57e-09 5.63e-09 8.12e-09 5.76e-08 1.96e-08 6.21e-08 erg/cm2
Peak flux CPL 1.63e-01 2.32e-01 9.17e-02 5.97e-03 4.92e-01 4.93e-01 ph/cm2/s
90%_error_low -7.25e-02 -5.29e-02 -3.95e-02 -5.97e-03 -1.06e-01 -1.07e-01 ph/cm2/s
90%_error_hi 7.23e-02 5.53e-02 4.08e-02 2.55e-02 1.07e-01 1.08e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 170.8546 28.9692 0.0255 12.9818 -130.5169 0.1131700 7.530 TRIG_00219646 Foreground time interval of the image: -0.224 2.776 (delta_t = 3.000 [sec]) Background time interval of the image: -239.224 -0.224 (delta_t = 239.000 [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 -0.224 sec. to 2.776 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.66342 ( -0.362037 0.340055 ) Norm@50keV : 2.35983E-03 ( -0.00054713 0.000531052 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 71.20 using 59 PHA bins. # Reduced chi-squared = 1.249 for 57 degrees of freedom # Null hypothesis probability = 9.775051e-02 Photon flux (15-150 keV) in 3 sec: 0.309525 ( -0.061731 0.061735 ) ph/cm2/s Energy fluence (15-150 keV) : 6.5766e-08 ( -1.57751e-08 1.6379e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.224 sec. to 2.776 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.405952 ( -1.71164 2.76068 ) Epeak [keV] : 53.9380 ( -12.2097 -53.8418 ) Norm@50keV : 1.22463E-02 ( -0.0124021 0.480965 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 69.65 using 59 PHA bins. # Reduced chi-squared = 1.244 for 56 degrees of freedom # Null hypothesis probability = 1.038354e-01 Photon flux (15-150 keV) in 3 sec: 0.295733 ( -0.06447 0.064633 ) ph/cm2/s Energy fluence (15-150 keV) : 5.75229e-08 ( -1.63405e-08 1.96227e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.776 sec. to 1.776 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.86176 ( -0.366829 0.331047 ) Norm@50keV : 3.65040E-03 ( -0.000954378 0.000931508 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 68.99 using 59 PHA bins. # Reduced chi-squared = 1.210 for 57 degrees of freedom # Null hypothesis probability = 1.326098e-01 Photon flux (15-150 keV) in 1 sec: 0.515591 ( -0.10803 0.108072 ) ph/cm2/s Energy fluence (15-150 keV) : 3.3556e-08 ( -8.49087e-09 8.89911e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.776 sec. to 1.776 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.864794 ( -1.87241 2.86391 ) Epeak [keV] : 43.6381 ( -8.58715 13.541 ) Norm@50keV : 0.133775 ( -0.139367 5.20781 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.89 using 59 PHA bins. # Reduced chi-squared = 1.105 for 56 degrees of freedom # Null hypothesis probability = 2.741126e-01 Photon flux (15-150 keV) in 1 sec: 0.492215 ( -0.106318 0.10685 ) ph/cm2/s Energy fluence (15-150 keV) : 2.89248e-08 ( -6.88995e-09 8.02908e-09 ) 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 = -1.497713022709813E-01, IMY = 1.752550698408311E-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: -239.224000 -0.224000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 198.2285 -11.8471 2.9 49.3 148.0 2.6543 4.0 ------ UNKNOWN 188.1816 3.5067 2.7 32.3 158.7 0.9280 4.3 ------ UNKNOWN 166.1888 38.1875 2.0 14.5 -88.0 0.9531 5.9 ------ UNKNOWN 121.8879 56.3594 2.9 46.0 -56.6 3.3401 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.224000 2.776000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.8546 28.9692 1.5 13.0 -130.5 0.1132 7.5 ------ UNKNOWN 99.9677 73.9814 2.9 54.4 -33.4 0.3014 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 113.076590 125.676600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0217 -15.6685 1.0 19.1 101.4 0.4420 11.8 3.0 Sco X-1 254.4791 35.4268 7.4 48.9 10.4 0.1428 1.5 5.2 Her X-1 256.1329 -37.8305 4.9 40.4 126.3 0.2177 2.4 7.0 4U 1700-377 256.5278 -36.5477 22.6 39.8 124.5 0.0483 0.5 8.7 GX 349+2 263.0074 -24.7644 35.5 38.2 103.8 0.0384 0.3 1.1 GX 1+4 268.3683 -1.3748 4.8 40.7 65.9 -0.3075 -2.4 4.7 SW J1753.5-0127 233.7346 -45.2038 2.3 39.0 154.9 0.2773 4.9 ------ UNKNOWN 219.7494 -25.5851 2.5 20.6 -177.2 0.1370 4.6 ------ UNKNOWN 235.9023 51.3323 1.9 58.3 -12.7 1.1707 6.2 ------ UNKNOWN 178.9688 -22.8464 2.4 49.8 -133.0 0.7344 4.7 ------ UNKNOWN