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 Aug 6 18:39:07 EDT 2018
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger846299
======================================================================
Trigger: 00846299 Segment: 000
BAT Trigger Time: 552498096 [s; MET]
Trigger Stop: 552498168 [s; MET]
UTC: 2018-07-05T15:41:14.784440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 212.594468636216 Dec: -11.6304515042116 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.79
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.79
Analysis Position: [ source = BAT ]
RA: 212.594468636216 Dec: -11.6304515042116 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 212.604737896368 Dec: -11.6383934900967 [deg; J2000]
{ 14h 10m 25.1s , -11d 38' 18.2" }
+/- 2.16622816361217 [arcmin] (estimated 90% radius based on SNR)
+/- 1.06930262511626 [arcmin] (formal 1-sigma fit error)
SNR: 10.0818667794077
Angular difference between the analysis and refined position is 0.768946 arcmin
Partial Coding Fraction: 0.3632812 [ including projection effects ]
Duration
T90: 106.783999919891 +/- 16.2025474954939
Measured from: 3.85199999809265
to: 110.635999917984 [s; relative to TRIGTIME]
T50: 61.4479999542236 +/- 25.6790887087807
Measured from: 27.4759999513626
to: 88.9239999055862 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.26400005817413
to: 4.26400005817413 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.259999990463257
to: 133.044000029564 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.831787 1.068405 1.010230 0.118613
0.141337 0.136047 0.115837 0.097438 [error]
Peak 0.029511 0.023555 0.040761 0.011007
0.012368 0.011611 0.011380 0.009419 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 132.784 0.260 133.044
T90 106.784 3.852 110.636
T50 61.448 27.476 88.924
Peak 1.000 3.264 4.264
====== 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 -1.625 -0.219 0.216 - - - 1.65e-03 -2.10e-04 2.09e-04 52.320 57
CPL -1.123 -0.669 1.038 90.820 -38.009 -90.820 2.90e-03 -9.28e-04 6.12e-03 51.360 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 -1.745 -0.853 0.704 - - - 5.91e-03 -2.73e-03 2.55e-03 42.320 57
CPL -0.808 -1.424 8.089 69.617 -69.617 -69.617 1.62e-02 -1.62e-02 8.92e+00 41.980 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 3.14e-07 5.35e-07 6.93e-07 1.82e-06 2.04e-06 3.36e-06 erg/cm2
90%_error_low -6.70e-08 -7.26e-08 -1.11e-07 -5.53e-07 -2.71e-07 -6.52e-07 erg/cm2
90%_error_hi 7.14e-08 7.18e-08 1.10e-07 6.91e-07 2.72e-07 7.54e-07 erg/cm2
Peak flux PL 3.08e-01 2.68e-01 1.60e-01 1.44e-01 7.97e-01 8.79e-01 ph/cm2/s
90%_error_low -1.78e-01 -1.13e-01 -9.06e-02 -1.44e-01 -3.28e-01 -3.55e-01 ph/cm2/s
90%_error_hi 2.19e-01 1.11e-01 8.84e-02 2.16e-01 3.31e-01 3.57e-01 ph/cm2/s
Fluence CPL 2.85e-07 5.60e-07 7.22e-07 9.54e-07 1.99e-06 2.52e-06 erg/cm2
90%_error_low -8.23e-08 -8.44e-08 -1.24e-07 -6.05e-07 -2.91e-07 -6.79e-07 erg/cm2
90%_error_hi 8.57e-08 8.78e-08 1.28e-07 1.06e-06 2.89e-07 1.14e-06 erg/cm2
Peak flux CPL 2.47e-01 2.85e-01 1.79e-01 7.24e-02 7.59e-01 7.81e-01 ph/cm2/s
90%_error_low -2.47e-01 -1.32e-01 -1.79e-01 -7.24e-02 N/A -3.91e-01 ph/cm2/s
90%_error_hi 2.67e-01 1.31e-01 1.27e-01 1.23e-01 N/A 4.24e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 212.6047 -11.6384 0.0191 47.5446 -3.2952 3.2970167 10.082 TRIG_00846299 Foreground time interval of the image: 0.260 133.044 (delta_t = 132.784 [sec]) Background time interval of the image: -239.000 0.260 (delta_t = 239.260 [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 0.260 sec. to 133.044 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.62525 ( -0.218807 0.216248 ) Norm@50keV : 1.64702E-03 ( -0.00020974 0.000209006 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.32 using 59 PHA bins. # Reduced chi-squared = 0.9179 for 57 degrees of freedom # Null hypothesis probability = 6.508868e-01 Photon flux (15-150 keV) in 132.8 sec: 0.213347 ( -0.028502 0.028673 ) ph/cm2/s Energy fluence (15-150 keV) : 2.03985e-06 ( -2.70888e-07 2.7226e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.260 sec. to 133.044 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.12341 ( -0.668672 1.03814 ) Epeak [keV] : 90.8202 ( -38.0095 -90.8203 ) Norm@50keV : 2.89880E-03 ( -0.000927615 0.00612164 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.36 using 59 PHA bins. # Reduced chi-squared = 0.9171 for 56 degrees of freedom # Null hypothesis probability = 6.509487e-01 Photon flux (15-150 keV) in 132.8 sec: 0.208131 ( -0.029936 0.030037 ) ph/cm2/s Energy fluence (15-150 keV) : 1.98503e-06 ( -2.90698e-07 2.89011e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 3.264 sec. to 4.264 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.74466 ( -0.853307 0.704125 ) Norm@50keV : 5.90895E-03 ( -0.00273216 0.00254552 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 42.32 using 59 PHA bins. # Reduced chi-squared = 0.7424 for 57 degrees of freedom # Null hypothesis probability = 9.265787e-01 Photon flux (15-150 keV) in 1 sec: 0.797461 ( -0.328344 0.331099 ) ph/cm2/s Energy fluence (15-150 keV) : 5.45494e-08 ( -2.42475e-08 2.51784e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.264 sec. to 4.264 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.808361 ( -1.42233 8.09071 ) Epeak [keV] : 69.6172 ( -69.7456 -69.7456 ) Norm@50keV : 1.62446E-02 ( -0.0162466 8.91626 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 41.98 using 59 PHA bins. # Reduced chi-squared = 0.7497 for 56 degrees of freedom # Null hypothesis probability = 9.177562e-01 Photon flux (15-150 keV) in 1 sec: 0.759325 ( ) ph/cm2/s Energy fluence (15-150 keV) : 5.31153e-08 ( -2.32078e-08 2.55005e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 106.784 sec. Hardness ratio (energy fluence ratio) = 1.29664167453
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 8.489661e-07 S(50-150 keV) = 1.1908801e-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 = 1.091209393467349E+00, IMY = 6.282735345596860E-02
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: -239.000000 0.260000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.4856 -60.5900 4.4 38.8 -92.5 2.7541 2.7 5.4 Cen X-3 186.7897 -62.7882 3.7 30.8 -92.9 1.2443 3.1 3.8 GX 301-2 244.9918 -15.6305 0.6 36.8 42.1 8.7873 19.4 0.9 Sco X-1 256.0225 -38.0265 3.8 17.0 76.3 0.8129 3.1 11.1 4U 1700-377 256.4310 -36.3873 3.5 18.6 74.8 0.9121 3.3 2.2 GX 349+2 262.9824 -24.6580 14.9 31.6 75.3 0.3449 0.8 5.4 GX 1+4 264.6674 -44.2715 13.7 16.4 108.0 -0.2041 -0.8 11.2 4U 1735-44 270.1614 -25.1713 4.6 34.0 86.4 1.3921 2.5 8.7 GX 5-1 270.2266 -25.6206 16.9 33.7 86.9 -0.4022 -0.7 8.4 GRS 1758-258 275.8907 -30.1774 5.2 32.7 99.2 -1.0758 -2.2 11.5 H1820-303 262.8867 -33.8552 11.2 23.3 84.3 0.3257 1.0 5.3 GX 354-0 310.7054 -62.5079 3.1 35.9 172.3 1.2984 3.8 ------ UNKNOWN 349.7441 -71.2545 2.7 46.1 -166.3 1.9625 4.3 ------ UNKNOWN 215.2671 -62.7585 2.6 17.9 -97.1 1.1097 4.4 ------ UNKNOWN 32.1744 -68.2443 4.1 57.2 -154.1 4.5146 2.8 ------ UNKNOWN 87.2551 -76.4909 3.1 50.2 -133.8 6.4571 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.260000 133.044000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.4747 -60.7170 4.5 38.7 -92.7 -1.3732 -2.6 7.3 Cen X-3 186.3052 -62.8207 11.2 31.0 -93.0 0.2828 1.0 10.1 GX 301-2 244.9706 -15.8117 28.7 36.6 42.1 0.1347 0.4 10.3 Sco X-1 256.2072 -37.8041 9.8 17.2 76.3 -0.2134 -1.2 10.7 4U 1700-377 256.4477 -36.4955 4.7 18.5 74.9 -0.4736 -2.5 4.4 GX 349+2 262.8893 -24.8211 29.7 31.4 75.2 -0.1205 -0.4 7.9 GX 1+4 264.6948 -44.2424 0.0 16.4 107.9 0.1489 0.8 12.6 4U 1735-44 270.1486 -25.0390 20.5 34.1 86.3 -0.2054 -0.6 7.7 GX 5-1 270.3428 -25.8470 11.1 33.5 87.3 -0.3623 -1.0 6.6 GRS 1758-258 275.7186 -30.4367 0.0 32.4 99.3 -0.7175 -2.2 11.5 H1820-303 263.2054 -33.8268 4.1 23.5 84.8 -0.6043 -2.8 10.8 GX 354-0 216.3679 -17.4226 1.9 40.8 -2.0 1.5407 6.1 ------ UNKNOWN 212.6044 -11.6387 1.1 47.5 -3.3 3.2943 10.1 ------ UNKNOWN 219.2599 -33.3106 2.3 25.6 -12.3 0.8044 5.0 ------ UNKNOWN 356.3107 -59.6778 2.8 55.8 -175.1 3.1511 4.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 300.300580 863.800580 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.2425 35.3991 4.8 15.8 144.3 -0.8851 -2.4 11.1 Her X-1 299.7539 35.1378 15.2 31.1 44.8 0.3978 0.8 8.9 Cyg X-1 308.1580 40.9555 5.3 33.0 28.6 1.1631 2.2 2.2 Cyg X-3 326.2534 38.1991 28.3 46.1 19.7 0.3118 0.4 8.3 Cyg X-2 336.6213 34.0717 2.4 55.2 17.1 9.4242 4.7 ------ UNKNOWN 233.9879 7.4959 2.3 48.6 158.8 6.4051 5.0 ------ UNKNOWN 294.5688 38.5031 2.9 25.8 44.8 1.7148 4.0 ------ UNKNOWN 188.9494 49.1184 2.9 45.4 -121.2 8.6854 3.9 ------ UNKNOWN