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: Thu Apr 13 17:21:46 EDT 2017
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger743065
======================================================================
Trigger: 00743065 Segment: 000
BAT Trigger Time: 511531935.296 [s; MET]
Trigger Stop: 511531939.392 [s; MET]
UTC: 2017-03-18T12:11:56.523520 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 305.64484692759 Dec: 28.4088371264311 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.17
Image Trigger?: NO
Rate S/N Ratio: 16.4924225024706 [ if not an image trigger ]
Image S/N Ratio: 12.17
Analysis Position: [ source = BAT ]
RA: 305.64484692759 Dec: 28.4088371264311 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 305.662886054861 Dec: 28.4056212980887 [deg; J2000]
{ 20h 22m 39.1s , +28d 24' 20.2" }
+/- 1.219494762415 [arcmin] (estimated 90% radius based on SNR)
+/- 0.406466426582266 [arcmin] (formal 1-sigma fit error)
SNR: 22.9088970640108
Angular difference between the analysis and refined position is 0.971377 arcmin
Partial Coding Fraction: 0.4375 [ including projection effects ]
Duration
T90: 116.915999948978 +/- 31.5270477928061
Measured from: -5.35600000619888
to: 111.55999994278 [s; relative to TRIGTIME]
T50: 36.2159999608994 +/- 5.37444324172465
Measured from: 5.6599999666214
to: 41.8759999275208 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.87199997901917
to: 2.87199997901917 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.5920000076294
to: 146.259999990463 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.983846 2.179676 1.559454 0.548996
0.112665 0.114733 0.099809 0.085071 [error]
Peak 0.030191 0.032227 0.080853 0.038840
0.010722 0.011612 0.010793 0.008831 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 167.852 -21.592 146.260
T90 116.916 -5.356 111.560
T50 36.216 5.660 41.876
Peak 1.000 1.872 2.872
====== 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: 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 -1.334 -0.107 0.108 - - - 2.21e-03 -1.39e-04 1.39e-04 74.310 57
CPL -0.774 -0.473 0.538 113.058 -32.467 288.883 4.18e-03 -1.71e-03 3.41e-03 70.180 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 -0.807 -0.358 0.395 - - - 1.06e-02 -2.54e-03 2.45e-03 83.160 57
CPL 1.078 -2.007 5.433 113.582 -33.136 -113.582 4.72e-02 -4.72e-02 1.61e+00 81.130 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 4.06e-07 8.27e-07 1.31e-06 4.62e-06 3.65e-06 7.17e-06 erg/cm2
90%_error_low -4.73e-08 -5.96e-08 -9.70e-08 -7.09e-07 -2.44e-07 -7.76e-07 erg/cm2
90%_error_hi 4.91e-08 5.92e-08 9.66e-08 7.93e-07 2.45e-07 8.44e-07 erg/cm2
Peak flux PL 2.26e-01 3.44e-01 3.93e-01 8.59e-01 1.22e+00 1.82e+00 ph/cm2/s
90%_error_low -1.01e-01 -1.07e-01 -8.10e-02 -3.23e-01 -2.76e-01 -3.93e-01 ph/cm2/s
90%_error_hi 1.26e-01 1.08e-01 8.09e-02 4.35e-01 2.81e-01 4.16e-01 ph/cm2/s
Fluence CPL 3.67e-07 8.73e-07 1.37e-06 2.15e-06 3.50e-06 4.76e-06 erg/cm2
90%_error_low -5.71e-08 -7.21e-08 -1.10e-07 -9.45e-07 -2.79e-07 -9.64e-07 erg/cm2
90%_error_hi 5.86e-08 7.40e-08 1.11e-07 1.90e-06 2.75e-07 1.87e-06 erg/cm2
Peak flux CPL 1.00e-01 3.06e-01 4.77e-01 3.41e-01 1.10e+00 1.23e+00 ph/cm2/s
90%_error_low -1.00e-01 -1.78e-01 -1.27e-01 -2.16e-01 -3.13e-01 -4.19e-01 ph/cm2/s
90%_error_hi 1.87e-01 1.38e-01 1.40e-01 6.54e-01 3.17e-01 7.64e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 305.6629 28.4056 0.0084 38.9668 -144.8383 4.1699026 22.909 TRIG_00743065 Foreground time interval of the image: -21.592 37.005 (delta_t = 58.597 [sec]) Background time interval of the image: -239.296 -21.592 (delta_t = 217.704 [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 -21.592 sec. to 146.260 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.33404 ( -0.106659 0.107874 ) Norm@50keV : 2.21459E-03 ( -0.000138819 0.000138817 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 74.31 using 59 PHA bins. # Reduced chi-squared = 1.304 for 57 degrees of freedom # Null hypothesis probability = 6.152562e-02 Photon flux (15-150 keV) in 167.9 sec: 0.265938 ( -0.017658 0.017704 ) ph/cm2/s Energy fluence (15-150 keV) : 3.64519e-06 ( -2.43692e-07 2.44728e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.592 sec. to 146.260 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.773957 ( -0.473002 0.538568 ) Epeak [keV] : 113.058 ( -32.4879 288.862 ) Norm@50keV : 4.17757E-03 ( -0.00170479 0.00341446 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 70.18 using 59 PHA bins. # Reduced chi-squared = 1.253 for 56 degrees of freedom # Null hypothesis probability = 9.628554e-02 Photon flux (15-150 keV) in 167.9 sec: 0.259725 ( -0.018479 0.018475 ) ph/cm2/s Energy fluence (15-150 keV) : 3.50495e-06 ( -2.78751e-07 2.74783e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.872 sec. to 2.872 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.807232 ( -0.357724 0.394984 ) Norm@50keV : 1.06097E-02 ( -0.00254252 0.00245108 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 83.16 using 59 PHA bins. # Reduced chi-squared = 1.459 for 57 degrees of freedom # Null hypothesis probability = 1.347755e-02 Photon flux (15-150 keV) in 1 sec: 1.21907 ( -0.275909 0.28129 ) ph/cm2/s Energy fluence (15-150 keV) : 1.23623e-07 ( -2.5825e-08 2.58387e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.872 sec. to 2.872 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.07846 ( -2.0185 5.42104 ) Epeak [keV] : 113.582 ( -32.8191 -113.265 ) Norm@50keV : 4.72059E-02 ( -0.0478517 1.61382 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 81.13 using 59 PHA bins. # Reduced chi-squared = 1.449 for 56 degrees of freedom # Null hypothesis probability = 1.570168e-02 Photon flux (15-150 keV) in 1 sec: 1.10328 ( -0.312814 0.31712 ) ph/cm2/s Energy fluence (15-150 keV) : 1.19812e-07 ( -2.84974e-08 2.71178e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = N/A sec. Hardness ratio (energy fluence ratio) = N/A
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = N/A S(50-150 keV) = N/A
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 = -6.612393533234450E-01, IMY = 4.657918283912302E-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: -239.296000 -21.592000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9878 -15.6312 0.9 38.2 68.7 8.7343 12.8 0.7 Sco X-1 254.4719 35.3621 4.2 46.0 149.3 2.3450 2.8 1.4 Her X-1 255.9772 -37.8221 2.0 42.0 31.1 2.9227 5.7 1.4 4U 1700-377 256.5914 -36.3973 13.8 40.6 32.0 0.4050 0.8 7.7 GX 349+2 262.8560 -24.7154 4.2 28.3 38.5 0.8446 2.7 8.5 GX 1+4 264.8757 -44.3568 10.2 43.9 17.7 -0.5239 -1.1 8.0 4U 1735-44 268.3750 -1.4774 295.4 13.3 96.6 0.0097 0.0 1.5 SW J1753.5-0127 270.2814 -25.0752 13.8 24.6 25.7 0.2318 0.8 0.3 GX 5-1 270.2810 -25.7419 23.3 25.2 25.0 0.1373 0.5 1.2 GRS 1758-258 274.1576 -14.0587 2.7 13.3 33.6 1.1878 4.4 8.9 GX 17+2 275.9145 -30.2819 4.5 27.8 11.0 0.7233 2.6 5.1 H1820-303 284.8845 -25.0747 0.0 22.3 -7.4 0.4487 1.8 12.4 HT1900.1-2455 288.8408 10.9507 1.2 15.7 -152.4 2.5138 9.3 2.5 GRS 1915+105 299.5670 35.2007 0.9 41.7 -157.3 5.8072 12.9 1.1 Cyg X-1 308.2485 41.0670 0.0 50.3 -153.5 1.6972 2.1 9.3 Cyg X-3 262.8364 -33.6759 6.1 35.4 28.0 0.7017 1.9 12.2 GX 354-0 259.9158 -25.0234 0.7 30.4 41.9 5.3350 15.4 ------ UNKNOWN 279.5844 32.2026 3.0 35.2 177.4 1.2548 3.9 ------ UNKNOWN 309.5439 47.8887 4.1 56.4 -157.4 4.9031 2.9 ------ UNKNOWN 323.8390 -35.4036 5.8 50.7 -44.6 3.1877 2.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -21.592000 37.004610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9923 -15.5178 4.3 38.2 68.9 -0.8780 -2.7 7.4 Sco X-1 254.5993 35.2317 0.0 45.8 149.3 -0.2850 -0.9 9.6 Her X-1 256.0334 -37.9036 8.4 42.0 31.0 -0.3092 -1.4 4.2 4U 1700-377 256.5882 -36.5367 9.7 40.7 31.8 -0.2547 -1.2 10.0 GX 349+2 262.9215 -24.6104 8.4 28.2 38.6 0.1958 1.4 9.4 GX 1+4 264.7380 -44.4518 107.3 44.1 17.8 -0.0235 -0.1 0.2 4U 1735-44 268.2867 -1.3260 4.5 13.4 97.2 -0.3140 -2.6 9.0 SW J1753.5-0127 270.3538 -25.1954 4.7 24.7 25.4 0.3171 2.5 7.9 GX 5-1 270.1484 -25.8771 9.6 25.4 25.1 0.1575 1.2 11.6 GRS 1758-258 274.1575 -13.9954 7.3 13.3 33.8 -0.1693 -1.6 9.2 GX 17+2 276.0655 -30.2964 5.2 27.8 10.7 -0.2645 -2.2 8.4 H1820-303 285.1725 -24.8295 12.2 22.1 -8.2 -0.1005 -0.9 9.2 HT1900.1-2455 288.6493 10.9914 8.3 15.6 -153.1 -0.1478 -1.4 9.2 GRS 1915+105 299.6500 35.1759 11.8 41.7 -157.2 -0.1845 -1.0 3.3 Cyg X-1 308.2490 41.0582 3.6 50.3 -153.5 -1.1530 -3.2 8.9 Cyg X-3 262.8347 -33.7926 5.2 35.5 27.9 -0.3603 -2.2 8.1 GX 354-0 242.9687 5.9024 2.8 39.6 103.4 1.7199 4.1 ------ UNKNOWN 271.7279 53.0269 2.0 56.6 173.3 4.1843 5.8 ------ UNKNOWN 305.6629 28.4056 0.5 39.0 -144.8 4.1701 22.9 ------ UNKNOWN 313.1061 41.3782 2.3 52.8 -150.1 2.0698 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 97.004590 662.764000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 268.2473 -1.3809 6.0 46.6 36.2 2.7260 1.9 8.4 SW J1753.5-0127 273.9729 -14.0085 8.2 52.3 19.5 2.5118 1.4 2.5 GX 17+2 285.0429 -24.8606 4.3 56.8 1.9 6.0139 2.7 3.6 HT1900.1-2455 288.7972 10.9520 1.1 23.5 24.9 4.8818 10.2 0.4 GRS 1915+105 299.5822 35.2051 0.5 8.5 124.0 10.2460 23.2 0.4 Cyg X-1 308.1586 40.9700 4.8 12.7 168.2 1.0825 2.4 2.4 Cyg X-3 325.9953 38.2919 4.2 19.6 -146.0 1.2305 2.7 8.5 Cyg X-2 314.3803 64.9578 2.2 37.0 165.6 3.8898 5.3 ------ UNKNOWN 322.8257 45.4005 2.9 21.8 -166.4 1.6513 4.0 ------ UNKNOWN