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 Jan 13 06:50:27 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger514709
======================================================================
Trigger: 00514709 Segment: 000
BAT Trigger Time: 350730690.624 [s; MET]
Trigger Stop: 350730691.648 [s; MET]
UTC: 2012-02-12T09:11:22.741460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 43.1047306460246 Dec: -18.0251590236093 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.09
Image Trigger?: NO
Rate S/N Ratio: 11.5325625946708 [ if not an image trigger ]
Image S/N Ratio: 9.09
Analysis Position: [ source = BAT ]
RA: 43.1047306460246 Dec: -18.0251590236093 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 43.0865997834577 Dec: -18.0374623581297 [deg; J2000]
{ 02h 52m 20.8s , -18d 02' 14.9" }
+/- 1.63221183875383 [arcmin] (estimated 90% radius based on SNR)
+/- 0.728295359400236 [arcmin] (formal 1-sigma fit error)
SNR: 15.1060847801132
Angular difference between the analysis and refined position is 1.270816 arcmin
Partial Coding Fraction: 0.2265625 [ including projection effects ]
Duration
T90: 5 +/- 2.23606797749979
Measured from: -0.624000012874603
to: 4.3759999871254 [s; relative to TRIGTIME]
T50: 2 +/- 1.4142135623731
Measured from: 0.375999987125397
to: 2.3759999871254 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.375999987125397
to: 1.3759999871254 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.624000012874603
to: 5.3759999871254 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.287611 0.335532 0.175112 0.023053
0.027735 0.028630 0.024724 0.021113 [error]
Peak 0.088969 0.061442 0.039922 0.014884
0.012466 0.012559 0.010492 0.008797 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 6.000 -0.624 5.376
T90 5.000 -0.624 4.376
T50 2.000 0.376 2.376
Peak 1.000 0.376 1.376
====== 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 -2.058 -0.196 0.186 - - - 8.56e-03 -1.09e-03 1.07e-03 59.810 57
CPL -1.744 -0.333 0.748 35.463 N/A N/A 1.29e-02 N/A N/A 59.130 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 -2.161 -0.395 0.348 - - - 1.16e-02 -2.95e-03 2.75e-03 63.900 57
CPL -1.992 N/A N/A 4.254 N/A N/A 1.35e-02 N/A N/A 64.340 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 1.11e-07 1.45e-07 1.40e-07 2.39e-07 4.75e-07 6.35e-07 erg/cm2
90%_error_low -1.58e-08 -1.46e-08 -2.40e-08 -7.27e-08 -5.54e-08 -1.02e-07 erg/cm2
90%_error_hi 1.62e-08 1.46e-08 2.44e-08 9.07e-08 5.62e-08 1.15e-07 erg/cm2
Peak flux PL 9.08e-01 6.20e-01 2.77e-01 1.72e-01 1.89e+00 1.98e+00 ph/cm2/s
90%_error_low -2.29e-01 -1.11e-01 -8.99e-02 -8.76e-02 -3.37e-01 -3.52e-01 ph/cm2/s
90%_error_hi 2.37e-01 1.11e-01 9.09e-02 1.27e-01 3.37e-01 3.52e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -1.58e-08 -1.46e-08 -2.40e-08 -7.27e-08 -5.54e-08 -1.02e-07 erg/cm2
90%_error_hi 1.62e-08 1.46e-08 2.44e-08 9.07e-08 5.62e-08 1.15e-07 erg/cm2
Peak flux CPL 8.82e-01 4.70e-01 1.60e-01 8.48e-02 1.56e+00 1.62e+00 ph/cm2/s
90%_error_low -2.51e-01 -2.42e-01 N/A N/A -5.71e-01 N/A ph/cm2/s
90%_error_hi 2.50e-01 2.43e-01 N/A N/A 3.32e-01 N/A ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 43.0866 -18.0375 0.0128 41.9362 -51.7517 0.8557065 15.106 TRIG_00514709 Foreground time interval of the image: -0.624 5.376 (delta_t = 6.000 [sec]) Background time interval of the image: -239.624 -0.624 (delta_t = 239.000 [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 -0.624 sec. to 5.376 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.05843 ( -0.196191 0.185551 ) Norm@50keV : 8.55670E-03 ( -0.00109215 0.00106551 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.81 using 59 PHA bins. # Reduced chi-squared = 1.049 for 57 degrees of freedom # Null hypothesis probability = 3.741906e-01 Photon flux (15-150 keV) in 6 sec: 1.31934 ( -0.13328 0.13336 ) ph/cm2/s Energy fluence (15-150 keV) : 4.75358e-07 ( -5.54048e-08 5.62126e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.624 sec. to 5.376 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.74436 ( -0.33347 0.747699 ) Epeak [keV] : 35.4634 ( ) Norm@50keV : 1.28630E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.13 using 59 PHA bins. # Reduced chi-squared = 1.056 for 56 degrees of freedom # Null hypothesis probability = 3.618799e-01 Photon flux (15-150 keV) in 6 sec: 1.30413 ( -0.13685 0.13686 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.376 sec. to 1.376 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.16148 ( -0.395192 0.34769 ) Norm@50keV : 1.16438E-02 ( -0.0029481 0.00275475 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.90 using 59 PHA bins. # Reduced chi-squared = 1.121 for 57 degrees of freedom # Null hypothesis probability = 2.471560e-01 Photon flux (15-150 keV) in 1 sec: 1.88965 ( -0.33729 0.33737 ) ph/cm2/s Energy fluence (15-150 keV) : 1.08941e-07 ( -2.31879e-08 2.36793e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.376 sec. to 1.376 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.9918 ( ) Epeak [keV] : 4.25379 ( ) Norm@50keV : 1.34544E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 64.34 using 59 PHA bins. # Reduced chi-squared = 1.149 for 56 degrees of freedom # Null hypothesis probability = 2.078088e-01 Photon flux (15-150 keV) in 1 sec: 1.55502 ( -0.57148 0.33172 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 5.0 sec. Hardness ratio (energy fluence ratio) = 0.960350396957
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.565225e-07 S(50-150 keV) = 2.1883514e-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 = 5.561663115064384E-01, IMY = 7.055375896096804E-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: -239.624000 -0.624000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6238 22.0150 0.7 47.0 32.8 9.2586 15.7 0.5 Crab 135.5920 -40.5060 4.0 42.7 161.8 0.9470 2.8 4.1 Vela X-1 37.5518 -17.5279 4.3 47.1 -53.3 2.3436 2.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.624000 5.376000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.5996 22.0435 4.9 47.0 32.8 -0.1999 -2.4 2.6 Crab 135.6608 -40.5232 7.9 42.7 161.8 -0.0645 -1.4 6.3 Vela X-1 91.5109 12.6077 2.4 37.6 44.1 0.2256 4.8 ------ UNKNOWN 109.7717 -57.1091 2.0 36.0 -162.2 0.1595 5.8 ------ UNKNOWN 113.9830 -60.1399 2.6 39.8 -162.1 0.1422 4.4 ------ UNKNOWN 43.0866 -18.0375 0.8 41.9 -51.8 0.8556 15.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 434.776600 962.447800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5325 -40.5665 0.6 3.1 85.6 5.2384 18.8 0.7 Vela X-1 170.2550 -60.5825 2.1 27.2 -147.2 1.7037 5.5 3.0 Cen X-3 186.6587 -62.7780 1.0 35.3 -147.1 5.2008 12.0 0.5 GX 301-2 144.5297 -12.4849 2.6 32.2 90.1 2.8865 4.4 ------ UNKNOWN 169.8582 -27.8891 2.6 32.3 144.4 2.0253 4.4 ------ UNKNOWN 193.1097 -46.6013 2.4 40.5 -172.9 1.9876 4.7 ------ UNKNOWN 214.4876 -45.8638 2.4 54.4 -165.9 4.7834 4.8 ------ UNKNOWN 227.4502 -66.7576 3.2 51.8 -138.5 5.8848 3.6 ------ UNKNOWN 213.7648 -80.7339 2.9 45.4 -121.2 5.1383 4.0 ------ UNKNOWN