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 17:05:31 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger509717
======================================================================
Trigger: 00509717 Segment: 000
BAT Trigger Time: 345650656 [s; MET]
Trigger Stop: 345650976 [s; MET]
UTC: 2011-12-15T14:04:08.321280 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 349.548231274995 Dec: 32.475567914634 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: NO [ by BAT flight software ]
Image S/N Ratio: 8.16
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.16
Analysis Position: [ source = BAT ]
RA: 349.548231274995 Dec: 32.475567914634 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 349.548 Dec: 32.4756 [deg; J2000]
{ 23h 18m 11.5s , +32d 28' 32.2" }
+/- 2.45235028722 [arcmin] (estimated 90% radius based on SNR)
SNR: 8.44556606931
Angular difference between the analysis and refined position is 0.011864 arcmin
Partial Coding Fraction: 0.4648438 [ including projection effects ]
Duration
T90: 373.819999992847 +/- 93.2202465729463
Measured from: 7.60399997234344
to: 381.423999965191 [s; relative to TRIGTIME]
T50: 154.979999959469 +/- 110.461724542731
Measured from: 129.431999981403
to: 284.411999940872 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 216.347999989986
to: 217.347999989986 [s; relative to TRIGTIME]
Total Fluence
Measured from: 1.61599999666214
to: 411.019999980927 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.302848 1.429054 1.185111 0.260853
0.169394 0.175700 0.159015 0.146620 [error]
Peak 0.016779 0.017615 0.024819 0.014824
0.008662 0.008769 0.007763 0.007037 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 409.404 1.616 411.020
T90 373.820 7.604 381.424
T50 154.980 129.432 284.412
Peak 1.000 216.348 217.348
====== 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 -1.605 -0.209 0.206 - - - 7.08e-04 -9.14e-05 9.05e-05 64.710 57
CPL -1.155 -0.432 0.852 87.871 -33.995 -87.871 1.24e-03 -5.95e-04 2.26e-03 63.570 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 -1.385 -0.781 0.806 - - - 4.10e-03 -1.77e-03 1.77e-03 48.420 57
CPL -0.757 -6.953 0.757 109.286 -109.286 -109.286 8.03e-03 -8.03e-03 8.23e+00 48.250 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 4.09e-07 7.04e-07 9.26e-07 2.48e-06 2.71e-06 4.52e-06 erg/cm2
90%_error_low -7.78e-08 -8.77e-08 -1.55e-07 -7.62e-07 -3.72e-07 -9.18e-07 erg/cm2
90%_error_hi 8.11e-08 8.74e-08 1.55e-07 9.63e-07 3.77e-07 1.08e-06 erg/cm2
Peak flux PL 1.51e-01 1.63e-01 1.25e-01 1.56e-01 4.98e-01 5.95e-01 ph/cm2/s
90%_error_low -1.03e-01 -1.63e-01 -1.25e-01 -1.56e-01 -2.24e-01 -2.57e-01 ph/cm2/s
90%_error_hi 1.34e-01 7.96e-02 6.13e-02 2.24e-01 2.28e-01 2.60e-01 ph/cm2/s
Fluence CPL 3.87e-07 7.44e-07 9.41e-07 1.22e-06 2.61e-06 3.29e-06 erg/cm2
90%_error_low -8.67e-08 -1.08e-07 -1.69e-07 -8.08e-07 -4.10e-07 -9.22e-07 erg/cm2
90%_error_hi 8.84e-08 1.13e-07 1.69e-07 1.90e-06 4.11e-07 1.63e-06 erg/cm2
Peak flux CPL 1.30e-01 1.70e-01 1.34e-01 8.97e-02 4.84e-01 5.24e-01 ph/cm2/s
90%_error_low -1.30e-01 -1.70e-01 -7.08e-02 -8.97e-02 -2.62e-01 -3.00e-01 ph/cm2/s
90%_error_hi 1.50e-01 9.36e-02 8.34e-02 1.21e-01 2.35e-01 3.12e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-50.0 keV image (Event data)
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 349.548 32.476 0.000 42.307 -26.439 2.447 8.446 TRIG_00509717 Image time interval: 0.000 to 320.000 [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 1.616 sec. to 411.020 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.60499 ( -0.209392 0.206021 ) Norm@50keV : 7.08415E-04 ( -9.14009e-05 9.04605e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 64.71 using 59 PHA bins. # Reduced chi-squared = 1.135 for 57 degrees of freedom # Null hypothesis probability = 2.256178e-01 Photon flux (15-150 keV) in 409.4 sec: 9.11790E-02 ( -0.0112514 0.011266 ) ph/cm2/s Energy fluence (15-150 keV) : 2.71105e-06 ( -3.71956e-07 3.76811e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.616 sec. to 411.020 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.15545 ( -0.432135 0.852348 ) Epeak [keV] : 87.8706 ( -34.0009 -87.8763 ) Norm@50keV : 1.23526E-03 ( -0.00059493 0.00226045 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.57 using 59 PHA bins. # Reduced chi-squared = 1.135 for 56 degrees of freedom # Null hypothesis probability = 2.273739e-01 Photon flux (15-150 keV) in 409.4 sec: 8.97410E-02 ( -0.0114757 0.011488 ) ph/cm2/s Energy fluence (15-150 keV) : 2.60758e-06 ( -4.09981e-07 4.11107e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 216.348 sec. to 217.348 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.38511 ( -0.780848 0.805627 ) Norm@50keV : 4.10487E-03 ( -0.00176925 0.00176695 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.42 using 59 PHA bins. # Reduced chi-squared = 0.8494 for 57 degrees of freedom # Null hypothesis probability = 7.837407e-01 Photon flux (15-150 keV) in 1 sec: 0.498241 ( -0.223911 0.227791 ) ph/cm2/s Energy fluence (15-150 keV) : 3.97915e-08 ( -1.80825e-08 1.84765e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 216.348 sec. to 217.348 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.75715 ( -6.95224 0.757876 ) Epeak [keV] : 109.286 ( -109.35 -109.35 ) Norm@50keV : 8.02696E-03 ( -0.00802131 8.23012 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.25 using 59 PHA bins. # Reduced chi-squared = 0.8617 for 56 degrees of freedom # Null hypothesis probability = 7.595500e-01 Photon flux (15-150 keV) in 1 sec: 0.484446 ( -0.261872 0.234672 ) ph/cm2/s Energy fluence (15-150 keV) : 3.87552e-08 ( -1.83571e-08 1.89746e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = N/A sec. Hardness ratio (energy fluence ratio) = N/A
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = N/A S(50-150 keV) = N/A
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 = 0.814948701689, IMY = 0.405239122531
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: -129.599400 1.616000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 32.4519 58.3202 2.5 50.3 26.9 3.4297 4.7 ------ UNKNOWN 336.2419 22.2211 3.0 50.7 -44.7 2.8360 3.9 ------ UNKNOWN 352.2990 -14.4565 3.6 41.2 -100.0 2.3435 3.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 1.616000 344.900600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 53.3910 26.4740 2.0 31.0 73.8 4.2474 5.7 ------ UNKNOWN 30.7926 32.4273 2.3 24.5 31.0 2.3147 5.1 ------ UNKNOWN 15.8273 33.6318 2.1 27.4 2.7 2.2057 5.6 ------ UNKNOWN 15.8043 8.1034 2.3 11.1 -66.5 1.8584 5.0 ------ UNKNOWN 15.3421 0.0213 1.9 14.2 -101.4 2.2971 6.0 ------ UNKNOWN 5.9883 15.4689 1.9 21.8 -45.4 2.4256 6.2 ------ UNKNOWN 17.3493 -24.0253 2.4 33.6 -140.8 2.3669 4.8 ------ UNKNOWN 342.0557 9.8185 2.8 44.4 -61.1 6.4574 4.1 ------ UNKNOWN 351.2147 -11.8865 2.4 40.8 -95.8 6.7977 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 406.300600 963.080000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.5799 35.1906 0.5 41.2 -50.4 18.6224 22.5 0.8 Cyg X-1 308.1072 40.9485 1.9 34.0 -42.0 2.9671 5.9 0.3 Cyg X-3 326.1063 38.2336 5.7 19.9 -45.1 0.6911 2.0 6.1 Cyg X-2 31.4296 43.7843 3.0 34.4 80.1 3.1908 3.9 ------ UNKNOWN 28.6887 37.8487 3.1 32.2 90.9 2.6339 3.8 ------ UNKNOWN 13.0254 -4.3043 2.6 43.0 166.0 3.3635 4.5 ------ UNKNOWN 349.5387 32.4866 1.5 0.0 -83.7 2.5633 7.6 ------ UNKNOWN 275.7203 60.9961 3.3 54.3 -13.4 3.6143 3.5 ------ UNKNOWN 328.5634 -11.6184 2.2 48.5 -130.4 9.1486 5.2 ------ UNKNOWN