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 22:58:06 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger106415
======================================================================
Trigger: 00106415 Segment: 000
BAT Trigger Time: 130509600.448 [s; MET]
Trigger Stop: 130509601.472 [s; MET]
UTC: 2005-02-19T12:40:01.049120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 166.429163614216 Dec: -40.6800821105552 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8
Image Trigger?: NO
Rate S/N Ratio: 14.6969384566991 [ if not an image trigger ]
Image S/N Ratio: 8
Analysis Position: [ source = BAT ]
RA: 166.429163614216 Dec: -40.6800821105552 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 166.412871629105 Dec: -40.6848015687723 [deg; J2000]
{ 11h 05m 39.1s , -40d 41' 05.3" }
+/- 0.918195918923422 [arcmin] (estimated 90% radius based on SNR)
+/- 0.325665706723692 [arcmin] (formal 1-sigma fit error)
SNR: 34.3611640813677
Angular difference between the analysis and refined position is 0.793529 arcmin
Partial Coding Fraction: 0.2324219 [ including projection effects ]
Duration
T90: 23.8120000064373 +/- 2.25817271194732
Measured from: -3.51999999582767
to: 20.2920000106096 [s; relative to TRIGTIME]
T50: 10.0320000052452 +/- 0.8513988517486
Measured from: 3.34000000357628
to: 13.3720000088215 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 9.68000000715256
to: 10.6800000071526 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.80799999833107
to: 30.4000000059605 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.057818 2.121125 2.175980 0.383267
0.059527 0.066701 0.060254 0.046377 [error]
Peak 0.071675 0.146945 0.162879 0.039946
0.011052 0.013605 0.013417 0.009178 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 36.208 -5.808 30.400
T90 23.812 -3.520 20.292
T50 10.032 3.340 13.372
Peak 1.000 9.680 10.680
====== 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 -1.302 -0.056 0.056 - - - 1.19e-02 -4.08e-04 4.08e-04 100.280 57
CPL -0.124 -0.282 0.301 91.094 -7.897 11.503 3.97e-02 -9.63e-03 1.36e-02 39.480 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 -1.115 -0.143 0.146 - - - 3.01e-02 -2.83e-03 2.83e-03 51.720 57
CPL -0.144 -0.623 0.724 111.107 -25.322 90.518 8.19e-02 -3.79e-02 8.37e-02 44.120 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 4.58e-07 9.50e-07 1.54e-06 5.62e-06 4.27e-06 8.57e-06 erg/cm2
90%_error_low -2.98e-08 -3.84e-08 -5.88e-08 -4.52e-07 -1.51e-07 -4.88e-07 erg/cm2
90%_error_hi 3.04e-08 3.83e-08 5.87e-08 4.76e-07 1.51e-07 5.07e-07 erg/cm2
Peak flux PL 8.59e-01 1.09e+00 1.00e+00 1.62e+00 3.50e+00 4.57e+00 ph/cm2/s
90%_error_low -1.47e-01 -1.23e-01 -1.01e-01 -3.04e-01 -3.40e-01 -4.41e-01 ph/cm2/s
90%_error_hi 1.55e-01 1.22e-01 1.00e-01 3.40e-01 3.40e-01 4.45e-01 ph/cm2/s
Fluence CPL 3.39e-07 1.02e-06 1.74e-06 1.82e-06 4.08e-06 4.91e-06 erg/cm2
90%_error_low -3.67e-08 -4.47e-08 -7.49e-08 -3.54e-07 -1.60e-07 -3.73e-07 erg/cm2
90%_error_hi 3.79e-08 4.49e-08 7.56e-08 4.56e-07 1.59e-07 4.62e-07 erg/cm2
Peak flux CPL 6.71e-01 1.16e+00 1.15e+00 7.77e-01 3.43e+00 3.75e+00 ph/cm2/s
90%_error_low -1.76e-01 -1.41e-01 -1.35e-01 -2.81e-01 -3.43e-01 -4.48e-01 ph/cm2/s
90%_error_hi 1.88e-01 1.43e-01 1.38e-01 4.52e-01 3.43e-01 5.33e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 166.4129 -40.6848 0.0056 43.1049 -133.4711 3.8362634 34.361 TRIG_00106415 Foreground time interval of the image: -5.808 11.253 (delta_t = 17.061 [sec]) Background time interval of the image: -299.448 -5.808 (delta_t = 293.640 [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 -5.808 sec. to 30.400 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.30155 ( -0.0560307 0.0562912 ) Norm@50keV : 1.19227E-02 ( -0.000408083 0.000407933 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 100.28 using 59 PHA bins. # Reduced chi-squared = 1.7593 for 57 degrees of freedom # Null hypothesis probability = 3.522957e-04 Photon flux (15-150 keV) in 36.21 sec: 1.42284 ( -0.05239 0.05249 ) ph/cm2/s Energy fluence (15-150 keV) : 4.2651e-06 ( -1.50874e-07 1.50993e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.808 sec. to 30.400 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.123833 ( -0.282429 0.300897 ) Epeak [keV] : 91.0944 ( -7.89741 11.5027 ) Norm@50keV : 3.96728E-02 ( -0.00963467 0.0135974 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 39.48 using 59 PHA bins. # Reduced chi-squared = 0.7050 for 56 degrees of freedom # Null hypothesis probability = 9.538556e-01 Photon flux (15-150 keV) in 36.21 sec: 1.34507 ( -0.05466 0.05485 ) ph/cm2/s Energy fluence (15-150 keV) : 4.08206e-06 ( -1.59512e-07 1.59429e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 9.680 sec. to 10.680 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.11549 ( -0.143272 0.145561 ) Norm@50keV : 3.01492E-02 ( -0.00283382 0.00282954 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.72 using 59 PHA bins. # Reduced chi-squared = 0.9073 for 57 degrees of freedom # Null hypothesis probability = 6.728603e-01 Photon flux (15-150 keV) in 1 sec: 3.50256 ( -0.33965 0.3403 ) ph/cm2/s Energy fluence (15-150 keV) : 3.13711e-07 ( -3.08585e-08 3.09086e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 9.680 sec. to 10.680 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.143732 ( -0.622642 0.724397 ) Epeak [keV] : 111.107 ( -25.3218 90.5179 ) Norm@50keV : 8.18730E-02 ( -0.0378749 0.083705 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 44.12 using 59 PHA bins. # Reduced chi-squared = 0.7878 for 56 degrees of freedom # Null hypothesis probability = 8.748094e-01 Photon flux (15-150 keV) in 1 sec: 3.43394 ( -0.34283 0.34347 ) ph/cm2/s Energy fluence (15-150 keV) : 3.08901e-07 ( -3.20603e-08 3.18993e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 23.812 sec. Hardness ratio (energy fluence ratio) = 1.70828436844
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.3552205e-06 S(50-150 keV) = 2.7268687e-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 = -6.439178082441278E-01, IMY = 6.792333782720322E-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: -299.448000 -5.808000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 185.7946 -4.2541 2.6 36.7 162.1 1.1722 4.4 ------ UNKNOWN 186.8836 -31.8570 2.7 47.4 -159.2 1.4012 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -5.808000 11.252600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 104.9845 23.3051 2.6 49.1 7.8 0.4084 4.5 ------ UNKNOWN 161.9496 -21.3413 2.2 24.3 -144.3 0.2311 5.2 ------ UNKNOWN 166.4129 -40.6848 0.3 43.1 -133.5 3.8362 34.4 ------ UNKNOWN 194.7139 -40.6168 2.8 57.5 -154.3 1.0782 4.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 79.252590 302.595700 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5212 -40.5574 0.4 23.3 6.7 4.0586 27.6 0.4 Vela X-1 169.9386 -60.5278 0.0 19.9 -78.6 -0.3531 -2.2 12.5 Cen X-3 186.6979 -62.7198 2.7 25.1 -95.5 0.8980 4.3 3.2 GX 301-2 166.7209 -0.1240 2.2 40.6 107.0 3.0660 5.4 ------ UNKNOWN 144.2678 -5.6795 2.8 40.3 71.0 2.4233 4.1 ------ UNKNOWN 189.7430 -1.5984 2.8 44.4 140.9 2.0215 4.2 ------ UNKNOWN 192.8704 -10.8457 2.4 37.9 151.9 1.3202 4.8 ------ UNKNOWN 168.2278 -27.9198 2.4 12.9 113.7 0.7278 4.9 ------ UNKNOWN 200.1669 -25.5084 2.5 31.8 178.5 0.7736 4.5 ------ UNKNOWN 223.8637 -12.8730 4.1 57.1 -175.4 2.1774 2.8 ------ UNKNOWN