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: Sun Nov 1 01:26:32 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger657564
======================================================================
Trigger: 00657564 Segment: 000
BAT Trigger Time: 465674960 [s; MET]
Trigger Stop: 465675032 [s; MET]
UTC: 2015-10-04T18:09:04.774100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 213.584663525959 Dec: -64.9473172592527 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.34
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.34
Analysis Position: [ source = BAT ]
RA: 213.584663525959 Dec: -64.9473172592527 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 213.612422909715 Dec: -64.9553838360062 [deg; J2000]
{ 14h 14m 27.0s , -64d 57' 19.4" }
+/- 2.32132264971755 [arcmin] (estimated 90% radius based on SNR)
+/- 1.38499924215337 [arcmin] (formal 1-sigma fit error)
SNR: 9.13353887294024
Angular difference between the analysis and refined position is 0.855294 arcmin
Partial Coding Fraction: 1.03125 [ including projection effects ]
Duration
T90: 137.271999955177 +/- 17.0245339786588
Measured from: -9.36000001430511
to: 127.911999940872 [s; relative to TRIGTIME]
T50: 69.1959999799728 +/- 20.6551922084551
Measured from: 22.0199999809265
to: 91.2159999608994 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 50.8600000143051
to: 51.8600000143051 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.6320000290871
to: 134.367999970913 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.733502 0.696735 0.398822 0.174855
0.079864 0.075049 0.062808 0.053940 [error]
Peak 0.028063 0.014240 0.007713 0.009344
0.006751 0.006192 0.005121 0.004326 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 148.000 -13.632 134.368
T90 137.272 -9.360 127.912
T50 69.196 22.020 91.216
Peak 1.000 50.860 51.860
====== 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 -1.953 -0.231 0.219 - - - 7.44e-04 -1.07e-04 1.04e-04 37.000 57
CPL -1.947 -0.728 0.913 356.408 N/A N/A 7.49e-04 N/A N/A 37.010 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 -2.437 -1.081 0.813 - - - 2.18e-03 -2.18e-03 1.39e-03 77.120 57
CPL -1.849 N/A N/A 21.369 N/A N/A 3.77e-03 N/A N/A 77.930 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 2.15e-07 3.01e-07 3.11e-07 5.88e-07 1.01e-06 1.41e-06 erg/cm2
90%_error_low -3.60e-08 -3.41e-08 -6.09e-08 -2.04e-07 -1.37e-07 -2.74e-07 erg/cm2
90%_error_hi 3.71e-08 3.41e-08 6.21e-08 2.68e-07 1.41e-07 3.23e-07 erg/cm2
Peak flux PL 2.23e-01 1.30e-01 4.79e-02 2.34e-02 4.13e-01 4.24e-01 ph/cm2/s
90%_error_low -1.01e-01 -5.77e-02 -3.46e-02 -2.34e-02 -1.46e-01 -1.52e-01 ph/cm2/s
90%_error_hi 1.01e-01 5.11e-02 4.58e-02 6.39e-02 1.46e-01 1.54e-01 ph/cm2/s
Fluence CPL 2.16e-07 2.99e-07 3.13e-07 6.65e-07 1.02e-06 1.41e-06 erg/cm2
90%_error_low -3.82e-08 -4.62e-08 -6.29e-08 -4.82e-07 -1.71e-07 -5.02e-07 erg/cm2
90%_error_hi 3.32e-08 3.35e-08 3.71e-08 1.50e-07 1.19e-07 1.69e-07 erg/cm2
Peak flux CPL 2.09e-01 8.47e-02 2.12e-02 7.75e-03 3.20e-01 3.22e-01 ph/cm2/s
90%_error_low -1.04e-01 -8.47e-02 N/A -7.75e-03 N/A -1.81e-01 ph/cm2/s
90%_error_hi 1.04e-01 8.86e-02 N/A 5.83e-02 N/A 2.41e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 213.6124 -64.9554 0.0211 16.0347 -166.3599 1.6049647 9.134 TRIG_00657564 Foreground time interval of the image: -13.632 134.368 (delta_t = 148.000 [sec]) Background time interval of the image: -204.899 -13.632 (delta_t = 191.267 [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 -13.632 sec. to 134.368 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.95256 ( -0.230686 0.219386 ) Norm@50keV : 7.43679E-04 ( -0.000106924 0.000103845 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 37.00 using 59 PHA bins. # Reduced chi-squared = 0.6492 for 57 degrees of freedom # Null hypothesis probability = 9.815691e-01 Photon flux (15-150 keV) in 148 sec: 0.109195 ( -0.012436 0.012446 ) ph/cm2/s Energy fluence (15-150 keV) : 1.01315e-06 ( -1.37493e-07 1.40631e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.632 sec. to 134.368 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.94703 ( -0.724369 0.915934 ) Epeak [keV] : 356.408 ( ) Norm@50keV : 7.48873E-04 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 37.00 using 59 PHA bins. # Reduced chi-squared = 0.6608 for 56 degrees of freedom # Null hypothesis probability = 9.764699e-01 Photon flux (15-150 keV) in 148 sec: 0.109481 ( -0.0123789 0.012383 ) ph/cm2/s Energy fluence (15-150 keV) : 1.02198e-06 ( -1.70582e-07 1.18775e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 50.860 sec. to 51.860 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.43741 ( -1.08139 0.813236 ) Norm@50keV : 2.18331E-03 ( -0.00218326 0.0013853 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 77.12 using 59 PHA bins. # Reduced chi-squared = 1.353 for 57 degrees of freedom # Null hypothesis probability = 3.920492e-02 Photon flux (15-150 keV) in 1 sec: 0.413040 ( -0.145714 0.14589 ) ph/cm2/s Energy fluence (15-150 keV) : 2.14902e-08 ( -9.70302e-09 1.13276e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 50.860 sec. to 51.860 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.84908 ( ) Epeak [keV] : 21.3692 ( ) Norm@50keV : 3.76509E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 77.93 using 59 PHA bins. # Reduced chi-squared = 1.392 for 56 degrees of freedom # Null hypothesis probability = 2.794911e-02 Photon flux (15-150 keV) in 1 sec: 0.319611 ( ) ph/cm2/s Energy fluence (15-150 keV) : 1.86226e-08 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 137.272 sec. Hardness ratio (energy fluence ratio) = 1.03347529753
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 5.159393e-07 S(50-150 keV) = 4.971974e-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 = -2.792950495861873E-01, IMY = 6.777528116018484E-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: -204.899400 -13.632000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3899 -60.6210 3.1 35.1 -153.3 1.0101 3.7 2.2 Cen X-3 186.3343 -62.7917 5.1 27.3 -154.0 0.4964 2.2 8.9 GX 301-2 244.9872 -15.6499 0.5 39.1 -14.2 6.4663 22.7 0.7 Sco X-1 255.7835 -37.9535 42.3 20.4 19.0 0.0561 0.3 11.6 4U 1700-377 256.5908 -36.3167 6.3 22.2 18.3 0.3979 1.8 9.9 GX 349+2 262.8748 -24.7310 31.4 34.9 17.0 -0.1118 -0.4 7.4 GX 1+4 264.8626 -44.3132 11.8 20.1 46.2 0.2216 1.0 9.7 4U 1735-44 270.4020 -25.1662 2.3 37.8 27.5 1.7824 5.0 8.3 GX 5-1 270.2522 -25.7551 3.3 37.2 27.9 1.2816 3.5 2.8 GRS 1758-258 274.0259 -14.0598 22.0 49.2 24.1 -0.3799 -0.5 1.8 GX 17+2 276.0767 -30.5162 3.3 36.2 39.5 -1.3528 -3.5 11.9 H1820-303 285.1076 -24.8936 11.6 45.5 44.0 -0.8739 -1.0 4.2 HT1900.1-2455 262.8244 -33.8787 5.0 26.9 25.7 0.5910 2.3 8.6 GX 354-0 116.4104 -59.1724 3.8 57.2 -173.9 3.6889 3.0 ------ UNKNOWN 246.9900 3.2652 2.2 58.1 -14.4 5.0286 5.2 ------ UNKNOWN 234.6912 -5.0664 2.7 49.3 -29.3 1.8937 4.2 ------ UNKNOWN 210.6056 -23.9810 2.6 36.4 -69.8 1.9756 4.4 ------ UNKNOWN 220.5980 -7.2808 2.5 49.0 -48.1 4.3856 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -13.632000 134.368000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.6065 -60.5493 4.0 35.1 -153.2 -0.7270 -2.9 9.6 Cen X-3 186.3576 -62.8119 6.6 27.3 -154.1 -0.3540 -1.7 8.6 GX 301-2 244.9348 -15.5827 6.4 39.1 -14.3 0.4675 1.8 4.3 Sco X-1 255.8040 -37.8451 22.8 20.5 18.9 0.0933 0.5 8.7 4U 1700-377 256.5278 -36.5929 7.8 21.9 18.5 0.2731 1.5 11.1 GX 349+2 262.9905 -24.5913 8.0 35.1 17.1 -0.3926 -1.4 9.3 GX 1+4 264.8174 -44.3097 15.5 20.1 46.1 -0.1624 -0.7 9.0 4U 1735-44 270.1484 -25.1523 3.9 37.7 27.2 0.9183 3.0 8.6 GX 5-1 270.2735 -25.7594 7.4 37.2 27.9 -0.4851 -1.5 1.8 GRS 1758-258 273.9388 -13.9780 3.6 49.2 23.9 2.2678 3.2 5.2 GX 17+2 276.0056 -30.3939 9.4 36.3 39.2 0.4389 1.2 4.5 H1820-303 285.0404 -24.8523 7.4 45.5 43.9 1.2612 1.6 4.1 HT1900.1-2455 263.0566 -33.7991 6.1 27.1 26.0 0.4165 1.9 4.0 GX 354-0 213.6130 -64.9547 1.3 16.0 -166.4 1.5899 9.0 ------ UNKNOWN 250.5653 -7.3032 2.4 48.1 -8.1 1.8811 4.8 ------ UNKNOWN 167.6857 -64.4509 2.4 35.1 -160.3 1.1494 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 798.500630 963.110000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 268.3408 -1.4346 149.8 48.7 -42.0 -0.0383 -0.1 2.0 SW J1753.5-0127 270.2272 -24.9697 3.5 39.4 -73.5 1.4708 3.3 7.3 GX 5-1 270.2363 -25.8610 3.4 39.3 -74.9 1.5608 3.4 7.9 GRS 1758-258 273.9813 -14.0051 8.0 38.4 -55.2 0.4088 1.4 2.4 GX 17+2 276.0720 -30.2245 4.5 34.1 -82.1 0.7786 2.5 11.5 H1820-303 285.1521 -24.7407 0.0 25.9 -71.4 -0.2392 -1.1 12.5 HT1900.1-2455 288.8046 10.9590 0.9 41.6 -9.6 3.0343 12.5 0.9 GRS 1915+105 318.8045 -26.5587 3.3 6.1 157.2 0.5284 3.5 ------ UNKNOWN 15.5998 -62.1748 3.3 57.0 179.1 4.3822 3.6 ------ UNKNOWN 296.3911 1.7749 2.1 29.7 -7.8 1.0064 5.5 ------ UNKNOWN 284.0057 15.1402 2.7 47.7 -11.4 1.3374 4.2 ------ UNKNOWN 9.0480 -70.5976 2.9 57.4 -170.4 3.3006 4.0 ------ UNKNOWN 272.0204 2.3082 2.6 47.6 -35.1 1.7131 4.5 ------ UNKNOWN