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 Dec 4 15:28:25 EST 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger722063
======================================================================
Trigger: 00722063 Segment: 000
BAT Trigger Time: 500751043.904 [s; MET]
Trigger Stop: 500751044.928 [s; MET]
UTC: 2016-11-13T17:30:26.749800 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 179.833691635208 Dec: -5.3471792469297 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.96
Image Trigger?: NO
Rate S/N Ratio: 11.13552872566 [ if not an image trigger ]
Image S/N Ratio: 7.96
Analysis Position: [ source = BAT ]
RA: 179.833691635208 Dec: -5.3471792469297 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 179.796297647629 Dec: -5.31478833631046 [deg; J2000]
{ 11h 59m 11.1s , -05d 18' 53.2" }
+/- 1.06615857864602 [arcmin] (estimated 90% radius based on SNR)
+/- 0.328250346818861 [arcmin] (formal 1-sigma fit error)
SNR: 27.7570267043079
Angular difference between the analysis and refined position is 2.960993 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 43.4639999270439 +/- 5.28264322904351
Measured from: 0.660000026226044
to: 44.12399995327 [s; relative to TRIGTIME]
T50: 16.7719998955727 +/- 2.34798723365605
Measured from: 5.90400004386902
to: 22.6759999394417 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 15.2800000309944
to: 16.2800000309944 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.44800001382828
to: 55.2760000228882 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.999665 1.019718 0.682788 0.141868
0.044199 0.045876 0.039743 0.033777 [error]
Peak 0.049596 0.061988 0.052785 0.012542
0.006327 0.006838 0.005951 0.004555 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 58.724 -3.448 55.276
T90 43.464 0.660 44.124
T50 16.772 5.904 22.676
Peak 1.000 15.280 16.280
====== 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 -1.748 -0.100 0.099 - - - 2.84e-03 -1.59e-04 1.58e-04 63.490 57
CPL -1.709 -0.327 0.371 355.529 -279.535 -355.529 2.98e-03 -4.17e-04 1.61e-03 63.450 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 -1.463 -0.194 0.191 - - - 1.10e-02 -1.26e-03 1.25e-03 52.540 57
CPL -1.311 -0.733 0.738 226.114 -226.114 -226.114 1.31e-02 -5.33e-03 1.73e-02 52.380 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 2.69e-07 4.25e-07 5.06e-07 1.17e-06 1.54e-06 2.37e-06 erg/cm2
90%_error_low -2.32e-08 -2.21e-08 -3.91e-08 -1.83e-07 -8.95e-08 -2.17e-07 erg/cm2
90%_error_hi 2.38e-08 2.20e-08 3.92e-08 2.06e-07 9.02e-08 2.35e-07 erg/cm2
Peak flux PL 4.35e-01 4.48e-01 3.25e-01 3.78e-01 1.36e+00 1.59e+00 ph/cm2/s
90%_error_low -7.95e-02 -5.24e-02 -4.75e-02 -1.02e-01 -1.51e-01 -1.81e-01 ph/cm2/s
90%_error_hi 8.33e-02 5.20e-02 4.70e-02 1.22e-01 1.51e-01 1.83e-01 ph/cm2/s
Fluence CPL 2.67e-07 4.27e-07 5.07e-07 1.10e-06 1.53e-06 2.30e-06 erg/cm2
90%_error_low -2.74e-08 -2.34e-08 -3.94e-08 -4.87e-07 -1.04e-07 -5.01e-07 erg/cm2
90%_error_hi 2.17e-08 2.64e-08 3.99e-08 1.13e-07 9.47e-08 2.99e-07 erg/cm2
Peak flux CPL 4.25e-01 4.55e-01 3.30e-01 3.13e-01 1.35e+00 1.52e+00 ph/cm2/s
90%_error_low -9.28e-02 -5.78e-02 -4.95e-02 -1.73e-01 -1.54e-01 -2.42e-01 ph/cm2/s
90%_error_hi 8.63e-02 6.22e-02 5.24e-02 9.69e-02 1.54e-01 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 179.7963 -5.3148 0.0069 8.8320 -172.6001 1.2781646 27.757 TRIG_00722063 Foreground time interval of the image: -3.448 12.797 (delta_t = 16.245 [sec]) Background time interval of the image: -239.904 -3.448 (delta_t = 236.456 [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 -3.448 sec. to 55.276 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.7481 ( -0.100441 0.0991236 ) Norm@50keV : 2.84128E-03 ( -0.000159073 0.000157791 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.49 using 59 PHA bins. # Reduced chi-squared = 1.114 for 57 degrees of freedom # Null hypothesis probability = 2.585700e-01 Photon flux (15-150 keV) in 58.72 sec: 0.383939 ( -0.020186 0.020235 ) ph/cm2/s Energy fluence (15-150 keV) : 1.53991e-06 ( -8.94869e-08 9.01922e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.448 sec. to 55.276 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.70906 ( -0.327307 0.371132 ) Epeak [keV] : 355.529 ( -279.532 -355.526 ) Norm@50keV : 2.97752E-03 ( -0.000417227 0.00161251 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.45 using 59 PHA bins. # Reduced chi-squared = 1.133 for 56 degrees of freedom # Null hypothesis probability = 2.304593e-01 Photon flux (15-150 keV) in 58.72 sec: 0.382994 ( -0.021824 0.020983 ) ph/cm2/s Energy fluence (15-150 keV) : 1.5339e-06 ( -1.03896e-07 9.47482e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 15.280 sec. to 16.280 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.46299 ( -0.193893 0.19138 ) Norm@50keV : 1.09631E-02 ( -0.00126358 0.00125267 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.54 using 59 PHA bins. # Reduced chi-squared = 0.9217 for 57 degrees of freedom # Null hypothesis probability = 6.430823e-01 Photon flux (15-150 keV) in 1 sec: 1.35549 ( -0.15083 0.15091 ) ph/cm2/s Energy fluence (15-150 keV) : 1.04674e-07 ( -1.33679e-08 1.35212e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 15.280 sec. to 16.280 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.31098 ( -0.73266 0.737612 ) Epeak [keV] : 226.114 ( -226.113 -226.113 ) Norm@50keV : 1.31197E-02 ( -0.00533054 0.0173457 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.38 using 59 PHA bins. # Reduced chi-squared = 0.9354 for 56 degrees of freedom # Null hypothesis probability = 6.126413e-01 Photon flux (15-150 keV) in 1 sec: 1.34812 ( -0.15428 0.15388 ) ph/cm2/s Energy fluence (15-150 keV) : 1.03517e-07 ( -1.43837e-08 1.42761e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 43.464 sec. Hardness ratio (energy fluence ratio) = 1.19080323257
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 6.940634e-07 S(50-150 keV) = 8.458428e-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 = -1.540855908820452E-01, IMY = 2.001185976414777E-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: -239.904000 -3.448000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5582 -40.5878 5.8 44.4 23.1 0.8450 2.0 2.4 Vela X-1 170.4064 -60.7520 6.3 47.8 -17.7 -0.7218 -1.8 8.2 Cen X-3 186.7545 -62.7333 14.1 50.3 -27.7 -0.3995 -0.8 3.5 GX 301-2 179.2946 -8.1284 2.6 6.2 -164.5 0.8146 4.4 ------ UNKNOWN 169.2693 -34.6092 2.9 22.2 -7.3 0.7542 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -3.448000 12.796590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.4513 -40.4724 34.4 44.5 23.3 0.0319 0.3 6.1 Vela X-1 170.5631 -60.6300 56.1 47.7 -17.8 0.0197 0.2 7.3 Cen X-3 186.9604 -62.7329 5.4 50.3 -27.8 0.2662 2.2 8.6 GX 301-2 179.7963 -5.3148 0.4 8.8 -172.6 1.2782 27.8 ------ UNKNOWN 179.5670 -72.2554 2.6 59.2 -22.5 1.3788 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 40.796590 611.496630 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5426 -40.5580 38.8 53.0 22.5 0.6233 0.3 0.7 Vela X-1 170.5109 -60.6417 26.5 55.7 -13.7 -0.6419 -0.4 5.9 Cen X-3 186.7993 -62.7150 95.6 57.6 -23.0 0.2518 0.1 5.1 GX 301-2 144.6345 15.4803 6.5 40.6 102.2 2.5913 1.8 ------ UNKNOWN 153.4348 -37.1036 2.8 39.9 14.4 2.5937 4.1 ------ UNKNOWN 169.1201 -39.0660 3.1 35.1 -4.6 1.8328 3.7 ------ UNKNOWN 188.1519 -60.9861 2.9 56.0 -24.0 6.7394 4.0 ------ UNKNOWN