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: Mon Jan 13 18:44:38 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger506903
======================================================================
Trigger: 00506903 Segment: 000
BAT Trigger Time: 342010751.488 [s; MET]
Trigger Stop: 342010752.512 [s; MET]
UTC: 2011-11-03T10:59:03.953720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 265.703554097257 Dec: 1.58984331586706 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.72
Image Trigger?: NO
Rate S/N Ratio: 47.3392015141785 [ if not an image trigger ]
Image S/N Ratio: 16.72
Analysis Position: [ source = BAT ]
RA: 265.703554097257 Dec: 1.58984331586706 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 265.690925621519 Dec: 1.60511682143793 [deg; J2000]
{ 17h 42m 45.8s , +01d 36' 18.4" }
+/- 0.49099454723273 [arcmin] (estimated 90% radius based on SNR)
+/- 0.174806748210728 [arcmin] (formal 1-sigma fit error)
SNR: 84.030592192161
Angular difference between the analysis and refined position is 1.188900 arcmin
Partial Coding Fraction: 0.90625 [ including projection effects ]
Duration
T90: 144.775999963284 +/- 33.9018423536708
Measured from: 0.0960000157356262
to: 144.871999979019 [s; relative to TRIGTIME]
T50: 31.6159999370575 +/- 0.906342099393471
Measured from: 5.70000004768372
to: 37.3159999847412 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 5.47600001096725
to: 6.47600001096725 [s; relative to TRIGTIME]
Total Fluence
Measured from: -6.54799997806549
to: 250.780000030994 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.329865 4.660685 3.702335 0.983548
0.102482 0.093691 0.079090 0.064263 [error]
Peak 0.190407 0.339086 0.304593 0.088306
0.008861 0.010233 0.009927 0.007115 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 257.328 -6.548 250.780
T90 144.776 0.096 144.872
T50 31.616 5.700 37.316
Peak 1.000 5.476 6.476
====== 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 -1.415 -0.048 0.048 - - - 3.19e-03 -7.85e-05 7.85e-05 51.470 57
CPL -1.411 -0.049 0.152 9997.350 -9997.350 -9997.350 3.20e-03 -7.88e-05 5.18e-04 51.490 56
=== 1-s peak 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 -1.168 -0.061 0.062 - - - 6.14e-02 -2.13e-03 2.13e-03 50.970 57
CPL -0.838 -0.245 0.259 193.743 -61.730 358.291 8.74e-02 -1.97e-02 2.71e-02 45.590 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 9.68e-07 1.87e-06 2.81e-06 9.12e-06 7.91e-06 1.48e-05 erg/cm2
90%_error_low -5.09e-08 -5.67e-08 -8.21e-08 -6.21e-07 -2.03e-07 -6.55e-07 erg/cm2
90%_error_hi 5.21e-08 5.65e-08 8.19e-08 6.53e-07 2.03e-07 6.82e-07 erg/cm2
Peak flux PL 5.21e-04 6.19e-03 9.55e-02 8.63e+00 4.32e-01 8.69e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A N/A ph/cm2/s
Fluence CPL 9.73e-07 1.87e-06 2.81e-06 9.37e-06 7.93e-06 1.49e-05 erg/cm2
90%_error_low N/A -5.80e-08 -9.60e-08 -2.06e-06 -2.57e-07 -2.51e-06 erg/cm2
90%_error_hi N/A 5.70e-08 1.17e-07 -2.84e-07 1.64e-07 3.28e-07 erg/cm2
Peak flux CPL 1.70e+00 2.31e+00 2.08e+00 2.18e+00 7.07e+00 8.27e+00 ph/cm2/s
90%_error_low -1.57e-01 -1.02e-01 -9.61e-02 -4.77e-01 -2.69e-01 -5.55e-01 ph/cm2/s
90%_error_hi 1.60e-01 1.03e-01 9.70e-02 6.41e-01 2.69e-01 6.87e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 265.6909 1.6051 0.0023 13.6157 -84.0718 7.2529527 84.031 TRIG_00506903 Foreground time interval of the image: -6.548 12.413 (delta_t = 18.961 [sec]) Background time interval of the image: -239.488 -6.548 (delta_t = 232.940 [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 -6.548 sec. to 250.780 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.41459 ( -0.048216 0.0483438 ) Norm@50keV : 3.19188E-03 ( -7.85227e-05 7.8499e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.47 using 59 PHA bins. # Reduced chi-squared = 0.9029 for 57 degrees of freedom # Null hypothesis probability = 6.818615e-01 Photon flux (15-150 keV) in 257.3 sec: 0.390025 ( -0.010855 0.010914 ) ph/cm2/s Energy fluence (15-150 keV) : 7.91334e-06 ( -2.0271e-07 2.02993e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -6.548 sec. to 250.780 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.41121 ( -0.0485912 0.151597 ) Epeak [keV] : 9997.35 ( -9997.86 -9997.86 ) Norm@50keV : 3.20325E-03 ( -7.85088e-05 0.000518118 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.49 using 59 PHA bins. # Reduced chi-squared = 0.9194 for 56 degrees of freedom # Null hypothesis probability = 6.461376e-01 Photon flux (15-150 keV) in 257.3 sec: 0.390824 ( -0.014436 0.012041 ) ph/cm2/s Energy fluence (15-150 keV) : 7.92664e-06 ( -2.57447e-07 1.63569e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 5.476 sec. to 6.476 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.16762 ( -0.061414 0.0616049 ) Norm@50keV : 6.14101E-02 ( -0.00213163 0.00213156 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 50.97 using 59 PHA bins. # Reduced chi-squared = 0.8942 for 57 degrees of freedom # Null hypothesis probability = 6.995474e-01 Photon flux (15-150 keV) in 1 sec: 0.431637 ( ) ph/cm2/s Energy fluence (15-150 keV) : 6.28941e-07 ( -2.42827e-08 2.4355e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 5.476 sec. to 6.476 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.838237 ( -0.244585 0.258923 ) Epeak [keV] : 193.743 ( -61.7349 358.286 ) Norm@50keV : 8.73607E-02 ( -0.0196567 0.0270685 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 45.59 using 59 PHA bins. # Reduced chi-squared = 0.8141 for 56 degrees of freedom # Null hypothesis probability = 8.383933e-01 Photon flux (15-150 keV) in 1 sec: 7.06805 ( -0.2686 0.26866 ) ph/cm2/s Energy fluence (15-150 keV) : 6.16311e-07 ( -2.6436e-08 2.62731e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 144.776 sec. Hardness ratio (energy fluence ratio) = 1.50051408135
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.8422491e-06 S(50-150 keV) = 5.071099e-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 = 2.501653598879804E-02, IMY = 2.409202475006707E-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: -239.488000 -6.548000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9904 -15.6501 0.5 39.0 -106.2 16.0478 24.8 0.9 Sco X-1 254.5346 35.5325 726.1 39.1 -18.1 0.0041 0.0 12.0 Her X-1 256.0209 -37.8542 2.4 46.8 -140.4 2.7899 4.9 1.7 4U 1700-377 256.3290 -36.3815 5.6 45.4 -139.5 -1.0551 -2.1 5.7 GX 349+2 262.9185 -24.7362 6.3 32.5 -137.4 0.4552 1.8 5.0 GX 1+4 264.7464 -44.4692 467.8 49.9 -152.1 0.0123 0.0 1.2 4U 1735-44 268.4152 -1.3715 7.0 11.9 -100.7 0.3412 1.7 5.6 SW J1753.5-0127 270.2144 -25.0238 4.1 30.0 -149.2 0.6116 2.8 5.0 GX 5-1 270.3534 -25.7461 3.7 30.7 -149.9 0.6915 3.1 2.8 GRS 1758-258 274.0655 -14.0773 1.9 18.5 -149.8 1.2273 6.1 4.3 GX 17+2 275.8303 -30.5320 0.0 34.4 -160.5 0.1437 0.6 11.0 H1820-303 285.1399 -24.7740 3.7 29.1 -176.8 0.7269 3.1 10.5 HT1900.1-2455 288.7638 10.9747 1.7 12.0 66.6 1.1931 6.6 2.7 GRS 1915+105 299.5427 35.1729 2.0 36.7 42.9 2.0079 5.8 2.9 Cyg X-1 308.1226 41.0619 4.1 45.5 45.2 2.6100 2.8 6.6 Cyg X-3 263.0715 -33.8629 2.7 40.5 -144.8 1.3585 4.2 4.4 GX 354-0 312.2583 -1.9139 2.5 33.6 113.5 1.8345 4.6 ------ UNKNOWN 293.7818 49.0780 3.0 47.1 27.5 2.3477 3.9 ------ UNKNOWN 268.1324 10.5323 2.6 12.9 -43.0 0.7735 4.4 ------ UNKNOWN 270.4429 -20.5118 2.8 25.7 -146.4 0.8517 4.2 ------ UNKNOWN 267.6127 -50.5985 2.9 55.2 -156.7 2.9999 4.0 ------ UNKNOWN UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -6.548000 12.412600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.1141 -15.7345 4.4 38.9 -106.4 0.6483 2.6 9.6 Sco X-1 254.5789 35.4263 60.1 39.0 -18.1 -0.0240 -0.2 7.8 Her X-1 255.9961 -37.9307 3.1 46.8 -140.4 -0.8028 -3.7 5.2 4U 1700-377 256.4952 -36.4284 5.5 45.4 -139.7 -0.4228 -2.1 2.9 GX 349+2 262.9612 -24.7149 10.9 32.5 -137.4 -0.1163 -1.1 3.2 GX 1+4 264.5820 -44.4217 7.5 49.9 -152.0 0.3289 1.5 7.1 4U 1735-44 268.3673 -1.4456 34.8 12.0 -100.9 0.0270 0.3 0.4 SW J1753.5-0127 270.0992 -24.9901 5.5 30.0 -149.0 0.2062 2.1 11.4 GX 5-1 270.2534 -25.8053 4.3 30.7 -149.7 -0.2726 -2.7 4.6 GRS 1758-258 274.0586 -14.0398 46.6 18.5 -149.7 -0.0213 -0.2 3.1 GX 17+2 275.9072 -30.4123 4.4 34.3 -160.6 -0.2607 -2.6 2.9 H1820-303 285.1980 -24.9572 6.7 29.3 -176.8 -0.1673 -1.7 9.1 HT1900.1-2455 288.8112 11.0993 4.7 12.1 66.2 -0.2078 -2.4 9.3 GRS 1915+105 299.7658 35.1823 16.5 36.8 43.1 -0.1113 -0.7 8.7 Cyg X-1 308.3262 40.8165 9.4 45.4 45.6 -0.5301 -1.2 12.8 Cyg X-3 263.0439 -33.9298 8.8 40.6 -144.8 -0.1825 -1.3 6.3 GX 354-0 302.3673 30.1959 2.7 34.4 51.5 0.6863 4.3 ------ UNKNOWN 264.0222 32.6952 2.4 32.3 -9.9 0.4561 4.9 ------ UNKNOWN 265.6909 1.6051 0.1 13.6 -84.1 7.2534 84.2 ------ UNKNOWN 255.6891 -36.7235 2.2 46.0 -139.2 1.0652 5.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 48.412600 384.112600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9826 -15.6371 0.2 26.8 -109.4 22.5591 53.1 0.3 Sco X-1 254.4707 35.3493 136.9 35.3 5.5 0.0348 0.1 0.8 Her X-1 255.9355 -37.8782 2.0 40.5 -146.6 2.9653 5.9 3.2 4U 1700-377 256.4390 -36.4295 23.1 39.0 -146.7 0.2488 0.5 0.4 GX 349+2 262.9754 -24.7512 3.5 26.5 -153.0 1.0938 3.3 1.9 GX 1+4 264.7200 -44.6033 25.7 46.2 -157.6 -0.2937 -0.4 9.2 4U 1735-44 268.4048 -1.5204 18.7 4.1 160.7 0.1829 0.6 4.6 SW J1753.5-0127 270.4421 -25.0704 6.3 27.1 -168.0 0.5765 1.8 8.6 GX 5-1 270.3186 -25.7746 4.4 27.7 -167.5 0.8124 2.6 2.1 GRS 1758-258 273.9688 -13.9575 2.7 17.6 174.0 1.2759 4.3 5.2 GX 17+2 275.8561 -30.3534 5.5 33.4 -174.6 0.7881 2.1 3.7 H1820-303 285.1829 -24.9070 11.5 32.5 167.3 -0.4432 -1.0 8.0 HT1900.1-2455 288.8026 10.9747 1.0 24.8 88.3 5.1196 11.4 1.8 GRS 1915+105 262.9472 -33.8491 2.2 35.6 -154.6 1.9989 5.3 2.3 GX 354-0 289.7506 42.7374 3.7 46.4 45.8 4.7088 3.1 ------ UNKNOWN 288.0901 13.6935 3.2 25.2 81.7 1.4773 3.6 ------ UNKNOWN 265.7373 1.6404 1.1 0.0 59.0 3.1680 10.9 ------ UNKNOWN 229.8815 -20.6236 3.8 41.5 -102.8 4.9004 3.0 ------ UNKNOWN