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 18:13:34 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger192152
======================================================================
Trigger: 00192152 Segment: 000
BAT Trigger Time: 162416465.92 [s; MET]
Trigger Stop: 162416466.944 [s; MET]
UTC: 2006-02-23T19:41:04.886460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 254.241178315544 Dec: -30.8069451092458 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16.42
Image Trigger?: NO
Rate S/N Ratio: 40.7062648740952 [ if not an image trigger ]
Image S/N Ratio: 16.42
Analysis Position: [ source = BAT ]
RA: 254.241178315544 Dec: -30.8069451092458 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 254.241969024417 Dec: -30.8130559697583 [deg; J2000]
{ 16h 56m 58.1s , -30d 48' 47.0" }
+/- 0.733472155975042 [arcmin] (estimated 90% radius based on SNR)
+/- 0.241746008142274 [arcmin] (formal 1-sigma fit error)
SNR: 47.3617212456409
Angular difference between the analysis and refined position is 0.368909 arcmin
Partial Coding Fraction: 0.6796875 [ including projection effects ]
Duration
T90: 10.3600000143051 +/- 0.750948756400525
Measured from: -5.72799998521805
to: 4.63200002908707 [s; relative to TRIGTIME]
T50: 5.63600000739098 +/- 0.377973569811353
Measured from: -2.55999997258186
to: 3.07600003480911 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.00800001621246
to: 4.00800001621246 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7
to: 5.52400001883507 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.693958 0.916331 0.722478 0.196521
0.027358 0.026177 0.022318 0.016439 [error]
Peak 0.065923 0.117291 0.143322 0.039958
0.007829 0.008136 0.007971 0.005619 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 12.524 -7.000 5.524
T90 10.360 -5.728 4.632
T50 5.636 -2.560 3.076
Peak 1.000 3.008 4.008
====== 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 -1.475 -0.064 0.064 - - - 1.34e-02 -4.40e-04 4.40e-04 39.520 57
CPL -1.443 -0.094 0.119 995.684 -995.684 -995.684 1.39e-02 -8.61e-04 7.17e-04 40.090 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 -0.953 -0.117 0.119 - - - 2.50e-02 -1.70e-03 1.69e-03 56.060 57
CPL -0.560 -0.433 0.513 223.427 -92.253 -223.427 3.65e-02 -1.21e-02 2.18e-02 53.910 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 2.10e-07 3.91e-07 5.63e-07 1.72e-06 1.60e-06 2.88e-06 erg/cm2
90%_error_low -1.41e-08 -1.52e-08 -2.28e-08 -1.57e-07 -5.55e-08 -1.69e-07 erg/cm2
90%_error_hi 1.44e-08 1.51e-08 2.27e-08 1.68e-07 5.56e-08 1.78e-07 erg/cm2
Peak flux PL 6.12e-01 8.54e-01 8.82e-01 1.67e+00 2.88e+00 4.02e+00 ph/cm2/s
90%_error_low -8.57e-02 -7.50e-02 -6.14e-02 -2.42e-01 -1.98e-01 -2.87e-01 ph/cm2/s
90%_error_hi 9.07e-02 7.44e-02 6.11e-02 2.68e-01 1.98e-01 2.93e-01 ph/cm2/s
Fluence CPL 1.96e-07 2.51e-07 2.46e-07 5.39e-07 8.43e-07 9.99e-07 erg/cm2
90%_error_low -2.14e-08 -2.64e-08 -4.22e-08 -7.05e-08 -1.10e-07 9.79e-08 erg/cm2
90%_error_hi 1.49e-08 1.75e-08 2.33e-08 8.28e-07 6.06e-08 3.88e-07 erg/cm2
Peak flux CPL 5.42e-01 8.62e-01 9.26e-01 1.18e+00 2.83e+00 3.51e+00 ph/cm2/s
90%_error_low -1.13e-01 -7.89e-02 -7.91e-02 -3.76e-01 -2.05e-01 -4.43e-01 ph/cm2/s
90%_error_hi 1.19e-01 7.88e-02 8.06e-02 4.85e-01 2.06e-01 6.27e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 254.2420 -30.8131 0.0041 27.1172 27.0588 2.6306663 47.362 TRIG_00192152 Foreground time interval of the image: -7.000 5.524 (delta_t = 12.524 [sec]) Background time interval of the image: -254.019 -7.000 (delta_t = 247.019 [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 -7.000 sec. to 5.524 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.47468 ( -0.0638907 0.0639856 ) Norm@50keV : 1.34234E-02 ( -0.000440381 0.000440381 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 39.52 using 59 PHA bins. # Reduced chi-squared = 0.6934 for 57 degrees of freedom # Null hypothesis probability = 9.623276e-01 Photon flux (15-150 keV) in 12.52 sec: 1.66465 ( -0.06084 0.06106 ) ph/cm2/s Energy fluence (15-150 keV) : 1.60135e-06 ( -5.55419e-08 5.56232e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.000 sec. to 5.524 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.4718 ( -0.0942306 0.118551 ) Epeak [keV] : 9999.18 ( -9999.2 -9999.2 ) Norm@50keV : 1.34653E-02 ( -0.00044185 0.00113657 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 39.57 using 59 PHA bins. # Reduced chi-squared = 0.7066 for 56 degrees of freedom # Null hypothesis probability = 9.527663e-01 Photon flux (15-150 keV) in 12.52 sec: 1.66428 ( -0.06081 0.0611 ) ph/cm2/s Energy fluence (15-150 keV) : 8.43246e-07 ( -1.09992e-07 6.05999e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 3.008 sec. to 4.008 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.95314 ( -0.116588 0.11875 ) Norm@50keV : 2.50310E-02 ( -0.00170011 0.00169254 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.06 using 59 PHA bins. # Reduced chi-squared = 0.9835 for 57 degrees of freedom # Null hypothesis probability = 5.102824e-01 Photon flux (15-150 keV) in 1 sec: 2.87608 ( -0.19769 0.19817 ) ph/cm2/s Energy fluence (15-150 keV) : 2.7534e-07 ( -1.93282e-08 1.93938e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.008 sec. to 4.008 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.559664 ( -0.432654 0.513367 ) Epeak [keV] : 223.427 ( -92.2531 -223.427 ) Norm@50keV : 3.65100E-02 ( -0.0121395 0.0217738 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.91 using 59 PHA bins. # Reduced chi-squared = 0.9626 for 56 degrees of freedom # Null hypothesis probability = 5.545491e-01 Photon flux (15-150 keV) in 1 sec: 2.82564 ( -0.20548 0.20634 ) ph/cm2/s Energy fluence (15-150 keV) : 2.71794e-07 ( -2.0119e-08 2.00226e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 10.36 sec. Hardness ratio (energy fluence ratio) = 1.43926211985
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 6.006508e-07 S(50-150 keV) = 1.0006766e-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 = 4.560496767471577E-01, IMY = -2.329586767562424E-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: -254.019410 -7.000000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9863 -15.6529 0.5 23.8 67.5 9.5413 22.3 0.9 Sco X-1 254.5214 35.3496 4.6 43.8 166.0 1.2774 2.5 3.2 Her X-1 255.9630 -37.8141 1.7 32.8 18.4 2.6669 6.8 2.1 4U 1700-377 256.5883 -36.5833 5.3 31.5 18.4 0.8236 2.2 12.1 GX 349+2 263.0277 -24.7834 6.4 18.6 14.3 0.4769 1.8 2.5 GX 1+4 264.7424 -44.4504 69.0 37.8 4.6 -0.0706 -0.2 0.0 4U 1735-44 268.5183 -1.4832 9.2 5.3 -168.0 0.3505 1.3 9.2 SW J1753.5-0127 270.3048 -25.0776 2.9 18.5 -6.5 1.0231 4.0 1.1 GX 5-1 270.2680 -25.7874 7.3 19.2 -6.1 0.4126 1.6 3.2 GRS 1758-258 274.0592 -13.8951 4.9 9.6 -39.9 0.6440 2.3 9.0 GX 17+2 275.9692 -30.2937 3.8 24.9 -16.1 0.8480 3.0 5.0 H1820-303 284.8982 -24.9693 3.4 24.7 -39.0 0.9919 3.4 8.1 HT1900.1-2455 288.8172 10.9149 1.1 27.6 -128.3 3.2875 10.2 2.1 GRS 1915+105 299.5863 35.2024 1.1 51.7 -145.1 7.8246 10.3 0.2 Cyg X-1 262.9097 -33.9827 35.2 27.6 9.7 0.1053 0.3 9.7 GX 354-0 233.8925 -23.5960 2.3 36.4 60.1 3.5379 5.0 ------ UNKNOWN 255.2011 -41.6188 2.0 36.6 16.9 2.4160 5.7 ------ UNKNOWN 259.0190 49.9164 2.0 57.1 174.9 9.2007 5.9 ------ UNKNOWN 282.0096 7.5560 2.8 20.3 -133.1 1.0690 4.2 ------ UNKNOWN 311.0056 -50.5345 2.5 56.7 -30.1 6.9023 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -7.000000 5.524000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9637 -15.5448 8.6 23.8 67.7 0.0763 1.3 5.8 Sco X-1 254.4950 35.4672 80.2 43.9 166.0 -0.0116 -0.1 7.7 Her X-1 255.9342 -37.7092 3.6 32.7 18.5 -0.1776 -3.2 8.5 4U 1700-377 256.5974 -36.3804 10.5 31.3 18.5 0.0548 1.1 8.2 GX 349+2 263.0922 -24.8715 9.3 18.6 14.1 0.0542 1.2 8.8 GX 1+4 264.5748 -44.3943 16.2 37.8 4.8 -0.0479 -0.7 7.9 4U 1735-44 268.2225 -1.6061 0.0 5.2 -171.0 0.0890 2.2 12.7 SW J1753.5-0127 270.4438 -25.1508 5.2 18.6 -6.9 0.0925 2.2 9.7 GX 5-1 270.2120 -25.8306 5.6 19.3 -5.9 -0.0883 -2.0 7.2 GRS 1758-258 274.0342 -14.1843 9.7 9.8 -38.7 -0.0500 -1.2 9.0 GX 17+2 275.7742 -30.5292 0.0 25.0 -15.6 -0.0844 -1.9 12.5 H1820-303 285.0659 -24.7699 15.2 24.6 -39.6 0.0350 0.8 9.2 HT1900.1-2455 288.9474 10.9119 4.8 27.7 -128.1 -0.1242 -2.4 9.0 GRS 1915+105 299.6817 35.0380 4.2 51.6 -144.8 -0.3687 -2.8 10.8 Cyg X-1 262.9699 -33.6848 4.7 27.3 9.7 0.1230 2.5 9.0 GX 354-0 254.2419 -30.8131 0.2 27.1 27.1 2.6309 47.4 ------ UNKNOWN 290.2044 49.4603 4.1 59.6 -161.7 0.6662 2.8 ------ UNKNOWN 304.0631 30.3868 2.8 51.0 -137.3 0.7637 4.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 130.780590 302.250000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9770 -15.6226 0.9 48.0 -1.8 4.6785 12.5 1.1 Sco X-1 254.5317 35.3945 2.4 11.0 -107.6 0.7721 4.9 4.8 Her X-1 268.3566 -1.5872 3.3 42.2 -39.4 0.9342 3.5 8.1 SW J1753.5-0127 210.2569 30.9443 3.2 26.8 97.8 0.9486 3.6 ------ UNKNOWN 330.5658 74.1730 3.0 58.7 -159.2 3.7844 3.9 ------ UNKNOWN 287.6088 24.1895 2.2 40.8 -88.3 3.1507 5.3 ------ UNKNOWN