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 02:17:46 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger529606
======================================================================
Trigger: 00529606 Segment: 000
BAT Trigger Time: 365684776.448 [s; MET]
Trigger Stop: 365684777.472 [s; MET]
UTC: 2012-08-03T11:06:06.951500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 314.22374452902 Dec: 53.2824925997842 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.12
Image Trigger?: NO
Rate S/N Ratio: 12.4899959967968 [ if not an image trigger ]
Image S/N Ratio: 8.12
Analysis Position: [ source = BAT ]
RA: 314.22374452902 Dec: 53.2824925997842 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 314.220410918838 Dec: 53.295278350025 [deg; J2000]
{ 20h 56m 52.9s , +53d 17' 43.0" }
+/- 0.841851231597906 [arcmin] (estimated 90% radius based on SNR)
+/- 0.352947761609905 [arcmin] (formal 1-sigma fit error)
SNR: 38.8977983505519
Angular difference between the analysis and refined position is 0.776407 arcmin
Partial Coding Fraction: 0.5859375 [ including projection effects ]
Duration
T90: 39.0119999051094 +/- 7.25639468561777
Measured from: -0.143999993801117
to: 38.8679999113083 [s; relative to TRIGTIME]
T50: 12.3759999275208 +/- 1.7875166980481
Measured from: 3.88400000333786
to: 16.2599999308586 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.49199998378754
to: 5.49199998378754 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.67199999094009
to: 52.055999994278 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.658049 1.096268 0.850035 0.240980
0.042941 0.044855 0.040129 0.034323 [error]
Peak 0.044600 0.069012 0.063226 0.013176
0.006796 0.007565 0.006953 0.005565 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 54.728 -2.672 52.056
T90 39.012 -0.144 38.868
T50 12.376 3.884 16.260
Peak 1.000 4.492 5.492
====== 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: CPL)
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 -1.356 -0.083 0.083 - - - 3.57e-03 -1.69e-04 1.69e-04 58.020 57
CPL -0.847 -0.346 0.377 118.287 -29.863 131.463 6.30e-03 -1.98e-03 3.20e-03 51.490 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 -1.278 -0.189 0.191 - - - 1.29e-02 -1.49e-03 1.49e-03 61.380 57
CPL -0.677 -0.685 0.963 110.133 -41.316 -110.133 2.61e-02 -1.41e-02 5.27e-02 59.710 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 2.18e-07 4.38e-07 6.84e-07 2.36e-06 1.91e-06 3.70e-06 erg/cm2
90%_error_low -1.90e-08 -2.31e-08 -3.99e-08 -2.90e-07 -9.86e-08 -3.18e-07 erg/cm2
90%_error_hi 1.95e-08 2.30e-08 3.97e-08 3.17e-07 9.91e-08 3.41e-07 erg/cm2
Peak flux PL 4.29e-01 4.93e-01 4.07e-01 5.63e-01 1.53e+00 1.89e+00 ph/cm2/s
90%_error_low -8.54e-02 -6.37e-02 -5.59e-02 -1.43e-01 -1.79e-01 -2.27e-01 ph/cm2/s
90%_error_hi 9.00e-02 6.29e-02 5.53e-02 1.71e-01 1.80e-01 2.31e-01 ph/cm2/s
Fluence CPL 1.97e-07 4.58e-07 7.10e-07 1.18e-06 1.84e-06 2.54e-06 erg/cm2
90%_error_low -2.31e-08 -2.70e-08 -4.44e-08 -4.08e-07 -1.11e-07 -4.16e-07 erg/cm2
90%_error_hi 2.36e-08 2.75e-08 4.50e-08 6.79e-07 1.10e-07 6.73e-07 erg/cm2
Peak flux CPL 3.88e-01 5.25e-01 4.28e-01 2.88e-01 1.50e+00 1.63e+00 ph/cm2/s
90%_error_low -1.01e-01 -7.68e-02 -6.36e-02 -1.65e-01 -1.85e-01 -2.54e-01 ph/cm2/s
90%_error_hi 1.04e-01 8.03e-02 6.57e-02 3.29e-01 1.84e-01 3.91e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 314.2204 53.2953 0.0050 28.0762 141.1999 1.8206186 38.898 TRIG_00529606 Foreground time interval of the image: -2.672 10.853 (delta_t = 13.525 [sec]) Background time interval of the image: -594.147 -498.933 (delta_t = 95.214 [sec]) -239.448 -2.672 (delta_t = 236.776 [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 -2.672 sec. to 52.056 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.35608 ( -0.0831225 0.0833385 ) Norm@50keV : 3.57321E-03 ( -0.000168773 0.000168739 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 58.02 using 59 PHA bins. # Reduced chi-squared = 1.018 for 57 degrees of freedom # Null hypothesis probability = 4.373934e-01 Photon flux (15-150 keV) in 54.73 sec: 0.431016 ( -0.021182 0.021218 ) ph/cm2/s Energy fluence (15-150 keV) : 1.90764e-06 ( -9.86492e-08 9.91242e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.672 sec. to 52.056 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.846591 ( -0.346317 0.377306 ) Epeak [keV] : 118.287 ( -29.8643 131.462 ) Norm@50keV : 6.30305E-03 ( -0.00197686 0.00319991 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.49 using 59 PHA bins. # Reduced chi-squared = 0.9195 for 56 degrees of freedom # Null hypothesis probability = 6.459442e-01 Photon flux (15-150 keV) in 54.73 sec: 0.419891 ( -0.022439 0.022445 ) ph/cm2/s Energy fluence (15-150 keV) : 1.83775e-06 ( -1.10773e-07 1.10328e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 4.492 sec. to 5.492 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.2781 ( -0.188847 0.190844 ) Norm@50keV : 1.28997E-02 ( -0.00149229 0.00148949 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.38 using 59 PHA bins. # Reduced chi-squared = 1.077 for 57 degrees of freedom # Null hypothesis probability = 3.219324e-01 Photon flux (15-150 keV) in 1 sec: 1.53295 ( -0.17945 0.17965 ) ph/cm2/s Energy fluence (15-150 keV) : 1.28183e-07 ( -1.64478e-08 1.65941e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.492 sec. to 5.492 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.676509 ( -0.684619 0.962922 ) Epeak [keV] : 110.133 ( -41.3185 -110.135 ) Norm@50keV : 2.61457E-02 ( -0.0141265 0.0527071 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.71 using 59 PHA bins. # Reduced chi-squared = 1.066 for 56 degrees of freedom # Null hypothesis probability = 3.422949e-01 Photon flux (15-150 keV) in 1 sec: 1.50443 ( -0.18477 0.1841 ) ph/cm2/s Energy fluence (15-150 keV) : 1.22476e-07 ( -1.86252e-08 1.83848e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 39.012 sec. Hardness ratio (energy fluence ratio) = 1.5513507867
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 6.548382e-07 S(50-150 keV) = 1.1829291e-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 = -4.157109539910061E-01, IMY = -3.342416998680984E-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: -594.147380 -498.933500 -239.448000 -2.672000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 308.1476 40.9679 2.4 40.1 132.5 2.8999 4.8 1.9 Cyg X-3 326.0154 38.3832 11.5 34.9 111.1 -0.5102 -1.0 8.2 Cyg X-2 79.4888 36.3134 3.8 50.7 -44.5 4.0345 3.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -2.672000 10.852600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 308.0158 40.8175 18.5 40.3 132.4 -0.0639 -0.6 9.2 Cyg X-3 326.3443 38.4330 74.7 34.8 110.7 0.0138 0.2 10.5 Cyg X-2 314.2204 53.2953 0.3 28.1 141.2 1.8202 38.9 ------ UNKNOWN 117.4192 65.6928 2.1 40.9 -95.0 0.7750 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 59.452600 228.452600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5619 35.4492 4.7 44.7 -178.7 -0.5776 -2.5 8.2 Her X-1 299.6233 35.2301 1.2 20.8 125.4 1.3738 9.4 2.4 Cyg X-1 308.1465 40.9675 1.1 13.0 110.8 1.4306 10.5 1.9 Cyg X-3 325.9662 38.2426 4.7 17.1 57.0 0.3570 2.5 10.8 Cyg X-2 265.7856 17.2918 3.0 51.9 155.1 2.5901 3.8 ------ UNKNOWN 240.8943 29.3230 2.5 57.2 -173.8 3.0801 4.6 ------ UNKNOWN 228.9446 36.7436 4.3 58.7 -159.2 2.8841 2.7 ------ UNKNOWN