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 13:05:10 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger231702
======================================================================
Trigger: 00231702 Segment: 000
BAT Trigger Time: 181252502.528 [s; MET]
Trigger Stop: 181252506.624 [s; MET]
UTC: 2006-09-29T19:55:01.052660 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 263.164465019978 Dec: 29.8148078195528 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.67
Image Trigger?: NO
Rate S/N Ratio: 8.60232526704263 [ if not an image trigger ]
Image S/N Ratio: 8.67
Analysis Position: [ source = BAT ]
RA: 263.164465019978 Dec: 29.8148078195528 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 263.148390951141 Dec: 29.8221011644183 [deg; J2000]
{ 17h 32m 35.6s , +29d 49' 19.6" }
+/- 2.79163222978611 [arcmin] (estimated 90% radius based on SNR)
+/- 1.39157396412398 [arcmin] (formal 1-sigma fit error)
SNR: 7.01742999764148
Angular difference between the analysis and refined position is 0.944276 arcmin
Partial Coding Fraction: 0.84375 [ including projection effects ]
Duration
T90: 552.960000008345 +/- 26.8873894581438
Measured from: -2.53599998354912
to: 550.424000024796 [s; relative to TRIGTIME]
T50: 521.72800001502 +/- 577.978872750704
Measured from: 3.35199999809265
to: 525.080000013113 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.69200000166893
to: 3.69200000166893 [s; relative to TRIGTIME]
Total Fluence
Measured from: -4.71199998259544
to: 556.120000004768 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.616705 0.591449 0.408462 0.100021
0.117531 0.118215 0.104321 0.093974 [error]
Peak 0.014175 0.020557 0.015347 0.005370
0.005739 0.005464 0.004892 0.004126 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 560.832 -4.712 556.120
T90 552.960 -2.536 550.424
T50 521.728 3.352 525.080
Peak 1.000 2.692 3.692
====== 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 -1.915 -0.455 0.404 - - - 1.68e-04 -4.75e-05 4.42e-05 33.360 57
CPL -1.924 -0.674 0.751 9999.360 N/A N/A 1.67e-04 N/A N/A 33.360 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 -1.271 -0.588 0.598 - - - 3.72e-03 -1.05e-03 1.04e-03 59.690 57
CPL -1.288 -0.572 0.623 9999.360 -9999.360 -9999.360 3.73e-03 -1.05e-03 1.48e-02 59.700 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 1.78e-07 2.54e-07 2.69e-07 5.29e-07 8.66e-07 1.23e-06 erg/cm2
90%_error_low -5.08e-08 -5.24e-08 -1.01e-07 -3.11e-07 -2.25e-07 -4.39e-07 erg/cm2
90%_error_hi 5.24e-08 5.17e-08 1.05e-07 5.25e-07 2.37e-07 6.13e-07 erg/cm2
Peak flux PL 1.23e-01 1.42e-01 1.18e-01 1.64e-01 4.42e-01 5.46e-01 ph/cm2/s
90%_error_low -6.52e-02 -5.03e-02 -4.21e-02 -9.95e-02 -1.29e-01 -1.59e-01 ph/cm2/s
90%_error_hi 7.98e-02 4.68e-02 3.94e-02 1.70e-01 1.30e-01 1.67e-01 ph/cm2/s
Fluence CPL 1.69e-07 1.77e-07 1.74e-07 5.37e-07 7.38e-07 1.27e-06 erg/cm2
90%_error_low -5.96e-08 -8.03e-08 -1.57e-07 -2.77e-07 -4.78e-07 -5.57e-07 erg/cm2
90%_error_hi 5.87e-08 1.68e-07 1.13e-07 1.35e-07 3.28e-07 3.00e-07 erg/cm2
Peak flux CPL 1.23e-01 1.42e-01 1.16e-01 1.63e-01 4.44e-01 5.51e-01 ph/cm2/s
90%_error_low N/A N/A N/A N/A -1.33e-01 -1.99e-01 ph/cm2/s
90%_error_hi N/A N/A N/A N/A 1.29e-01 1.62e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 263.1484 29.8221 0.0273 19.1453 39.8779 0.5109228 7.017 TRIG_00231702 Foreground time interval of the image: -4.712 35.773 (delta_t = 40.485 [sec]) Background time interval of the image: -230.227 -4.712 (delta_t = 225.515 [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 -4.712 sec. to 556.120 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.91477 ( -0.45473 0.4036 ) Norm@50keV : 1.68008E-04 ( -4.75108e-05 4.42474e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 33.36 using 59 PHA bins. # Reduced chi-squared = 0.5852 for 57 degrees of freedom # Null hypothesis probability = 9.947809e-01 Photon flux (15-150 keV) in 560.8 sec: 2.42650E-02 ( -0.0048607 0.0048609 ) ph/cm2/s Energy fluence (15-150 keV) : 8.66498e-07 ( -2.25173e-07 2.37119e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -4.712 sec. to 556.120 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.42528 ( -0.172706 1.25229 ) Epeak [keV] : 152.426 ( ) Norm@50keV : 9.22806E-05 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 32.78 using 59 PHA bins. # Reduced chi-squared = 0.5854 for 56 degrees of freedom # Null hypothesis probability = 9.943948e-01 Photon flux (15-150 keV) in 560.8 sec: 2.27814E-02 ( -0.0078256 0.0061541 ) ph/cm2/s Energy fluence (15-150 keV) : 7.38495e-07 ( -4.78259e-07 3.27875e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 2.692 sec. to 3.692 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.27108 ( -0.588063 0.598421 ) Norm@50keV : 3.72130E-03 ( -0.00104537 0.00104435 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.69 using 59 PHA bins. # Reduced chi-squared = 1.047 for 57 degrees of freedom # Null hypothesis probability = 3.782845e-01 Photon flux (15-150 keV) in 1 sec: 0.441684 ( -0.129122 0.129892 ) ph/cm2/s Energy fluence (15-150 keV) : 3.70442e-08 ( -1.17367e-08 1.19596e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.692 sec. to 3.692 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.28764 ( -0.573256 0.622083 ) Epeak [keV] : 9999.36 ( -9999.36 -9999.36 ) Norm@50keV : 3.73378E-03 ( -0.00105165 0.0148015 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.70 using 59 PHA bins. # Reduced chi-squared = 1.066 for 56 degrees of freedom # Null hypothesis probability = 3.429166e-01 Photon flux (15-150 keV) in 1 sec: 0.444192 ( -0.133175 0.128807 ) ph/cm2/s Energy fluence (15-150 keV) : 3.69063e-08 ( -1.15667e-08 1.21924e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 552.96 sec. Hardness ratio (energy fluence ratio) = 1.06088911565
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.318536e-07 S(50-150 keV) = 4.346459e-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 = 2.664206550830084E-01, IMY = -2.225879905399725E-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: -230.227410 -4.712000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9864 -15.6404 0.3 29.6 -144.2 8.0353 37.7 0.4 Sco X-1 254.2981 35.3622 10.9 23.0 16.1 0.1950 1.1 7.9 Her X-1 255.9814 -37.8355 996.2 50.2 -164.7 -0.0054 -0.0 0.6 4U 1700-377 256.2407 -36.3257 9.7 48.7 -165.0 -0.4588 -1.2 11.1 GX 349+2 262.9544 -24.7968 2.8 38.1 -175.6 1.0678 4.1 4.3 GX 1+4 264.7383 -44.3249 4.0 57.5 -171.8 2.7040 3.0 7.5 4U 1735-44 268.4029 -1.4588 7.4 19.5 151.1 0.2784 1.6 2.1 SW J1753.5-0127 270.3331 -25.0563 2.2 40.5 174.5 1.5342 5.3 3.0 GX 5-1 270.4112 -25.7029 3.5 41.1 174.8 0.9792 3.3 6.3 GRS 1758-258 274.1219 -13.9522 11.4 32.7 159.9 0.2619 1.0 8.4 GX 17+2 275.8310 -30.4553 6.5 47.5 171.7 0.7333 1.8 7.2 H1820-303 284.9121 -24.9152 7.7 47.6 158.5 0.8643 1.5 6.7 HT1900.1-2455 288.7957 10.9396 1.0 33.5 105.6 4.4920 11.7 0.4 GRS 1915+105 262.9189 -33.8430 3.0 46.9 -172.7 1.2888 3.9 3.5 GX 354-0 252.1968 63.4480 2.7 51.1 15.4 2.5901 4.3 ------ UNKNOWN 247.0822 41.9428 2.9 30.3 5.6 0.8038 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -4.712000 35.772600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9187 -15.6608 4.3 29.6 -144.1 0.1925 2.7 3.7 Sco X-1 254.4317 35.4269 10.6 23.0 16.4 -0.0717 -1.1 5.2 Her X-1 256.1068 -37.8167 11.1 50.2 -164.8 -0.1595 -1.0 5.9 4U 1700-377 256.4994 -36.5178 4.5 48.9 -165.3 0.3543 2.6 6.5 GX 349+2 262.9452 -24.8649 8.5 38.1 -175.5 -0.1167 -1.4 8.0 GX 1+4 264.8343 -44.5862 12.6 57.7 -171.8 -0.3639 -1.0 9.1 4U 1735-44 268.4127 -1.3883 6.5 19.4 151.0 0.1232 1.8 4.7 SW J1753.5-0127 270.3712 -25.0842 3.4 40.5 174.5 -0.3494 -3.4 4.7 GX 5-1 270.4168 -25.6920 6.0 41.1 174.8 -0.2024 -1.9 6.9 GRS 1758-258 273.8727 -14.0523 28.8 32.6 160.3 -0.0365 -0.4 7.8 GX 17+2 275.9224 -30.3355 14.5 47.4 171.5 -0.1152 -0.8 1.9 H1820-303 284.9237 -24.9665 16.0 47.6 158.5 -0.1386 -0.7 6.7 HT1900.1-2455 288.6339 11.0399 0.0 33.3 105.5 0.0661 0.5 11.2 GRS 1915+105 262.8931 -33.7750 3.3 46.8 -172.7 -0.4360 -3.5 6.0 GX 354-0 275.1899 16.6868 2.5 20.4 92.1 0.3572 4.7 ------ UNKNOWN 263.1483 29.8221 1.6 19.1 39.9 0.5110 7.0 ------ UNKNOWN 245.6796 -42.3231 2.5 55.3 -155.2 1.1121 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 76.372600 962.512000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9778 -15.6339 0.7 48.7 -147.7 22.7351 15.7 0.4 Sco X-1 254.4841 35.1942 8.1 9.1 -42.7 0.8270 1.4 9.0 Her X-1 263.1113 -24.7485 9.4 54.6 -171.2 -2.6282 -1.2 5.6 GX 1+4 268.4033 -1.4664 2.4 31.7 178.8 2.8362 4.8 2.3 SW J1753.5-0127 270.1888 -25.0795 50.8 55.3 -179.0 -0.4754 -0.2 5.2 GX 5-1 270.2448 -25.7429 117.3 56.0 -178.9 -0.2191 -0.1 3.1 GRS 1758-258 273.9924 -13.9624 6.0 45.0 173.8 2.3372 1.9 4.5 GX 17+2 288.7876 10.9387 0.5 30.4 131.8 18.2218 21.6 0.8 GRS 1915+105 299.5990 35.2053 0.3 31.0 79.1 36.4657 38.5 0.5 Cyg X-1 308.1009 40.9454 18.2 37.8 69.2 -1.1038 -0.6 0.6 Cyg X-3 263.5990 4.4521 2.8 25.4 -172.2 2.2977 4.2 ------ UNKNOWN 236.7991 18.8725 3.4 26.3 -99.8 2.7233 3.4 ------ UNKNOWN 184.5218 62.8625 4.0 58.6 -22.8 15.6554 2.9 ------ UNKNOWN 206.2246 39.6559 4.7 47.0 -53.1 9.0517 2.5 ------ UNKNOWN 235.3745 -13.6152 5.9 51.0 -135.6 6.2070 2.0 ------ UNKNOWN 227.2178 3.3394 4.0 43.1 -112.2 8.5514 2.9 ------ UNKNOWN