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 GROUND-DETECTED GRB DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time: Sun Jul 10 22:56:32 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/ground_detect_bursts/scripts
======================================================================
Trigger: 00703769 Segment: 000
BAT Trigger Time: 489786560.0
UTC: 2016-07-09T19:49:03.464 [includes UTCF correction]
Where From?: Ground analysis (best_duration.txt)
NOTE: BAT trigger time for ground-detected burst is the T100 start time.
Analysis Position: [ source = GCN ]
RA: 236.0009 Dec: -28.186 [deg; J2000]
Refined Position: [ source = BAT pre-slew image ]
RA: 235.996320107 Dec: -28.1883821299 [deg; J2000]
{ 15h 43m 59.1s , -28d -11' -18.2" }
+/- 2.38600902192 [arcmin] (estimated 90% radius based on SNR)
SNR: 8.78301557104
Angular difference between the analysis and refined position is 0.281233 arcmin
Partial Coding Fraction: 0.1953125 [ including projection effects ]
Duration
T90: 4.80000001192093 +/- 1.6
Measured from: 0
to: 4.8 [s; relative to TRIGTIME]
T50: 3.20000004768372 +/- 1.6
Measured from: 0
to: 3.2 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 4.800 0.000 4.800
T90 4.800 0.000 4.800
T50 3.200 0.000 3.200
Peak 1.000 0.300 1.300
====== 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 -1.106 -0.271 0.282 - - - 9.08e-03 -1.41e-03 1.39e-03 43.910 57
CPL -0.659 -0.680 1.463 184.085 -184.085 -184.085 1.38e-02 -5.95e-03 3.60e-02 43.460 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 -0.996 -0.282 0.298 - - - 2.33e-02 -3.81e-03 3.76e-03 52.380 57
CPL -0.694 -0.557 1.503 254.757 -254.757 -254.757 3.14e-02 -1.15e-02 1.00e-01 52.200 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 3.85e-08 9.02e-08 1.68e-07 7.49e-07 4.55e-07 1.05e-06 erg/cm2
90%_error_low -1.19e-08 -1.77e-08 -2.73e-08 -2.50e-07 -7.04e-08 -2.65e-07 erg/cm2
90%_error_hi 1.35e-08 1.73e-08 2.69e-08 3.30e-07 7.07e-08 3.33e-07 erg/cm2
Peak flux PL 5.92e-01 8.05e-01 8.07e-01 1.46e+00 2.68e+00 3.67e+00 ph/cm2/s
90%_error_low -1.94e-01 -1.72e-01 -1.35e-01 -4.77e-01 -4.45e-01 -6.07e-01 ph/cm2/s
90%_error_hi 2.22e-01 1.69e-01 1.33e-01 6.18e-01 4.49e-01 6.33e-01 ph/cm2/s
Fluence CPL 3.36e-08 9.12e-08 1.76e-07 4.59e-07 4.47e-07 8.30e-07 erg/cm2
90%_error_low -1.62e-08 -1.88e-08 -3.31e-08 -3.03e-07 -7.46e-08 -3.84e-07 erg/cm2
90%_error_hi 1.71e-08 1.87e-08 3.55e-08 3.46e-07 7.35e-08 3.16e-07 erg/cm2
Peak flux CPL 5.43e-01 8.14e-01 8.36e-01 1.09e+00 2.64e+00 3.29e+00 ph/cm2/s
90%_error_low -2.54e-01 -1.79e-01 -1.58e-01 -1.09e+00 -4.71e-01 -9.17e-01 ph/cm2/s
90%_error_hi 2.60e-01 1.82e-01 1.79e-01 5.14e-01 4.64e-01 9.48e-01 ph/cm2/s
======================================================================
Image
15.0-350.0 keV image (Event data)
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 235.996 -28.188 0.022 35.819 -94.347 0.783 8.783 TRIG_00703769 Image time interval: -2.000 to 8.086 [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.
Best duration plot
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 0.000 sec. to 4.800 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.10593 ( -0.270646 0.282394 ) Norm@50keV : 9.07738E-03 ( -0.00140522 0.00138963 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.91 using 59 PHA bins. # Reduced chi-squared = 0.7703 for 57 degrees of freedom # Null hypothesis probability = 8.982000e-01 Photon flux (15-150 keV) in 4.8 sec: 1.05353 ( -0.170603 0.17271 ) ph/cm2/s Energy fluence (15-150 keV) : 4.54738e-07 ( -7.04198e-08 7.07117e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 4.800 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.658941 ( -0.67964 1.46322 ) Epeak [keV] : 184.085 ( -184.066 -184.066 ) Norm@50keV : 1.38447E-02 ( -0.00595223 0.0359869 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.46 using 59 PHA bins. # Reduced chi-squared = 0.7761 for 56 degrees of freedom # Null hypothesis probability = 8.892216e-01 Photon flux (15-150 keV) in 4.8 sec: 1.02476 ( -0.186163 0.18662 ) ph/cm2/s Energy fluence (15-150 keV) : 4.47055e-07 ( -7.46453e-08 7.35173e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.300 sec. to 1.300 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.995766 ( -0.282064 0.298377 ) Norm@50keV : 2.32534E-02 ( -0.00380923 0.0037611 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.38 using 59 PHA bins. # Reduced chi-squared = 0.9190 for 57 degrees of freedom # Null hypothesis probability = 6.486212e-01 Photon flux (15-150 keV) in 1 sec: 2.67655 ( -0.44515 0.44866 ) ph/cm2/s Energy fluence (15-150 keV) : 2.51855e-07 ( -4.18402e-08 4.20927e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.300 sec. to 1.300 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.693966 ( -0.556996 1.50312 ) Epeak [keV] : 254.757 ( -254.751 -254.751 ) Norm@50keV : 3.14047E-02 ( -0.0115247 0.100352 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.20 using 59 PHA bins. # Reduced chi-squared = 0.9321 for 56 degrees of freedom # Null hypothesis probability = 6.194851e-01 Photon flux (15-150 keV) in 1 sec: 2.63830 ( -0.47081 0.46398 ) ph/cm2/s Energy fluence (15-150 keV) : 2.48353e-07 ( -4.55661e-08 4.4069e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 4.8 sec. Hardness ratio (energy fluence ratio) = 1.85844661448
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.2867515e-07 S(50-150 keV) = 3.260649e-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 = -0.0546981484389, IMY = 0.719645910231
Spacecraft aspect plot
Bright source in the event data image
Event data image of 15-350 keV band
Time interval of the image: -2.000000 8.086200 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9845 -15.6311 1.4 30.5 -68.4 0.4455 8.0 0.6 Sco X-1 255.8035 -37.9805 0.0 21.6 -122.2 0.0119 0.3 11.9 4U 1700-377 256.4452 -36.3191 14.3 20.3 -118.9 0.0325 0.8 6.3 GX 349+2 262.9736 -24.8955 6.7 11.8 -82.9 -0.0612 -1.7 9.2 GX 1+4 264.5263 -44.3253 5.8 21.6 -147.2 0.0714 2.0 11.9 4U 1735-44 268.4657 -1.2905 35.2 24.7 -8.4 0.0120 0.3 11.4 SW J1753.5-0127 270.4513 -25.0795 6.4 5.1 -83.6 -0.0613 -1.8 9.1 GX 5-1 270.4785 -25.7970 8.8 5.1 -91.7 0.0435 1.3 10.0 GRS 1758-258 274.0054 -14.0535 16.9 11.0 -0.4 0.0232 0.7 1.0 GX 17+2 275.9015 -30.5227 9.2 5.7 -168.8 0.0402 1.3 9.4 H1820-303 284.8454 -24.8436 4.9 8.0 101.7 -0.0769 -2.3 11.4 HT1900.1-2455 288.6802 10.8904 8.4 37.8 30.5 0.0851 1.4 7.7 GRS 1915+105 262.8086 -33.6951 8.6 14.5 -120.5 0.0491 1.3 12.3 GX 354-0 255.0560 -55.4526 2.4 34.2 -148.9 0.2321 4.7 ------ UNKNOWN 235.9963 -28.1884 1.3 35.8 -94.3 0.7827 8.8 ------ UNKNOWN 230.3494 -27.0386 2.2 40.9 -93.3 0.8161 5.3 ------ UNKNOWN
Webpage updated on: Mon Jul 11 16:36:01 EDT 2016