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 22:41:05 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger111622
======================================================================
Trigger: 00111622 Segment: 000
BAT Trigger Time: 132917477.888 [s; MET]
Trigger Stop: 132917478.912 [s; MET]
UTC: 2005-03-19T09:31:18.449780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 154.15754637319 Dec: 43.5655654162315 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10
Image Trigger?: NO
Rate S/N Ratio: 11.5758369027902 [ if not an image trigger ]
Image S/N Ratio: 10
Analysis Position: [ source = BAT ]
RA: 154.15754637319 Dec: 43.5655654162315 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 154.171746620419 Dec: 43.579716241103 [deg; J2000]
{ 10h 16m 41.2s , +43d 34' 47.0" }
+/- 2.51205982073582 [arcmin] (estimated 90% radius based on SNR)
+/- 1.12454508838936 [arcmin] (formal 1-sigma fit error)
SNR: 8.15918882486912
Angular difference between the analysis and refined position is 1.049727 arcmin
Partial Coding Fraction: 0.4414062 [ including projection effects ]
Duration
T90: 151.584000006318 +/- 10.6441875246452
Measured from: -133.127999991179
to: 18.4560000151396 [s; relative to TRIGTIME]
T50: 124.548000007868 +/- 3.72483341955902
Measured from: -120.140000000596
to: 4.40800000727177 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.648000001907349
to: 1.64800000190735 [s; relative to TRIGTIME]
Total Fluence
Measured from: -134.091999992728
to: 27.7719999998808 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.907512 0.927147 0.492187 0.104715
0.074399 0.077045 0.066716 0.058091 [error]
Peak 0.050253 0.077711 0.026922 0.004965
0.007579 0.007794 0.006525 0.005279 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 161.864 -134.092 27.772
T90 151.584 -133.128 18.456
T50 124.548 -120.140 4.408
Peak 1.000 0.648 1.648
====== 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 -1.934 -0.178 0.171 - - - 8.95e-04 -1.03e-04 1.01e-04 43.320 57
CPL -1.624 -0.557 0.736 51.401 -49.197 -51.401 1.35e-03 -7.06e-04 2.21e-03 42.630 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 -2.014 -0.251 0.233 - - - 9.64e-03 -1.65e-03 1.61e-03 43.190 57
CPL -0.108 -1.472 2.720 40.012 -8.668 12.354 1.26e-01 -1.26e-01 5.62e+00 37.680 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 2.79e-07 3.93e-07 4.12e-07 7.93e-07 1.33e-06 1.88e-06 erg/cm2
90%_error_low -3.70e-08 -3.64e-08 -6.42e-08 -2.22e-07 -1.47e-07 -2.97e-07 erg/cm2
90%_error_hi 3.78e-08 3.64e-08 6.52e-08 2.74e-07 1.50e-07 3.37e-07 erg/cm2
Peak flux PL 6.51e-01 4.85e-01 2.40e-01 1.69e-01 1.46e+00 1.55e+00 ph/cm2/s
90%_error_low -1.22e-01 -6.67e-02 -5.23e-02 -6.08e-02 -2.01e-01 -2.13e-01 ph/cm2/s
90%_error_hi 1.27e-01 6.67e-02 5.31e-02 7.78e-02 2.01e-01 2.14e-01 ph/cm2/s
Fluence CPL 2.71e-07 4.09e-07 4.08e-07 4.48e-07 1.29e-06 1.54e-06 erg/cm2
90%_error_low -4.07e-08 -4.57e-08 -7.11e-08 -3.01e-07 -1.70e-07 -3.57e-07 erg/cm2
90%_error_hi 4.08e-08 4.93e-08 6.86e-08 4.14e-07 1.73e-07 6.01e-07 erg/cm2
Peak flux CPL 5.48e-01 5.92e-01 2.21e-01 2.14e-02 1.38e+00 1.38e+00 ph/cm2/s
90%_error_low -1.57e-01 -1.06e-01 -8.88e-02 -2.14e-02 -2.14e-01 -2.16e-01 ph/cm2/s
90%_error_hi 1.51e-01 1.19e-01 7.15e-02 7.95e-02 2.11e-01 2.16e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 154.1717 43.5797 0.0236 37.0839 158.0771 0.9717634 8.159 TRIG_00111622 Foreground time interval of the image: -66.187 10.413 (delta_t = 76.600 [sec]) Background time interval of the image:
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 -134.092 sec. to 27.772 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.93441 ( -0.178265 0.170734 ) Norm@50keV : 8.95013E-04 ( -0.000103162 0.000101053 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.32 using 59 PHA bins. # Reduced chi-squared = 0.7599 for 57 degrees of freedom # Null hypothesis probability = 9.094769e-01 Photon flux (15-150 keV) in 161.9 sec: 0.130370 ( -0.012091 0.012094 ) ph/cm2/s Energy fluence (15-150 keV) : 1.33317e-06 ( -1.47222e-07 1.49982e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -134.092 sec. to 27.772 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.62412 ( -0.557181 0.736159 ) Epeak [keV] : 51.4015 ( -49.1966 -51.4015 ) Norm@50keV : 1.34851E-03 ( -0.000706357 0.00220515 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 42.63 using 59 PHA bins. # Reduced chi-squared = 0.7613 for 56 degrees of freedom # Null hypothesis probability = 9.059604e-01 Photon flux (15-150 keV) in 161.9 sec: 0.128812 ( -0.012498 0.012491 ) ph/cm2/s Energy fluence (15-150 keV) : 1.28955e-06 ( -1.69781e-07 1.72956e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.648 sec. to 1.648 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.01377 ( -0.250796 0.233161 ) Norm@50keV : 9.63875E-03 ( -0.00165251 0.00161208 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.19 using 59 PHA bins. # Reduced chi-squared = 0.7577 for 57 degrees of freedom # Null hypothesis probability = 9.117897e-01 Photon flux (15-150 keV) in 1 sec: 1.45515 ( -0.20084 0.20093 ) ph/cm2/s Energy fluence (15-150 keV) : 8.89734e-08 ( -1.41978e-08 1.44812e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.648 sec. to 1.648 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.107529 ( -1.47762 2.71366 ) Epeak [keV] : 40.0123 ( -8.65117 12.371 ) Norm@50keV : 0.126433 ( -0.128531 5.61906 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 37.68 using 59 PHA bins. # Reduced chi-squared = 0.6728 for 56 degrees of freedom # Null hypothesis probability = 9.714293e-01 Photon flux (15-150 keV) in 1 sec: 1.38065 ( -0.21372 0.21055 ) ph/cm2/s Energy fluence (15-150 keV) : 7.71756e-08 ( -1.49169e-08 1.66e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 151.584 sec. Hardness ratio (energy fluence ratio) = 1.0465496423
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 6.719449e-07 S(50-150 keV) = 6.612005e-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 = -7.011950019389600E-01, IMY = -2.822039830821212E-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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -66.187400 10.412590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4622 35.2013 7.3 36.2 -30.8 0.1558 1.6 8.5 Her X-1 136.5976 34.8508 2.6 53.2 158.3 1.6849 4.4 ------ UNKNOWN 154.1718 43.5797 1.4 37.1 158.1 0.9719 8.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 73.212590 302.190600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 129.7299 4.2509 2.2 44.9 159.9 1.6121 5.2 ------ UNKNOWN 147.5580 60.8374 2.3 17.7 -66.4 0.7077 5.0 ------ UNKNOWN 260.7839 68.6823 2.5 55.5 -30.8 3.4357 4.7 ------ UNKNOWN 90.6534 23.6796 3.3 55.0 -145.2 3.1230 3.5 ------ UNKNOWN 89.6736 70.2115 2.9 41.0 -83.6 2.5209 4.0 ------ UNKNOWN