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 02:56:31 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger529021
======================================================================
Trigger: 00529021 Segment: 000
BAT Trigger Time: 365207120.512 [s; MET]
Trigger Stop: 365207132.672 [s; MET]
UTC: 2012-07-28T22:25:11.035380 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 137.100024602055 Dec: -54.4372942698869 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.23
Image Trigger?: NO
Rate S/N Ratio: 19.1049731745428 [ if not an image trigger ]
Image S/N Ratio: 11.23
Analysis Position: [ source = BAT ]
RA: 137.100024602055 Dec: -54.4372942698869 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 137.087485477206 Dec: -54.4364229474265 [deg; J2000]
{ 09h 08m 21.0s , -54d 26' 11.1" }
+/- 1.38297425160344 [arcmin] (estimated 90% radius based on SNR)
+/- 0.53893401560829 [arcmin] (formal 1-sigma fit error)
SNR: 19.1405929688511
Angular difference between the analysis and refined position is 0.440677 arcmin
Partial Coding Fraction: 0.1347656 [ including projection effects ]
Duration
T90: 20.9760000705719 +/- 2.05921922729959
Measured from: 1.2399999499321
to: 22.216000020504 [s; relative to TRIGTIME]
T50: 10.2879999876022 +/- 1.71207478912046
Measured from: 5.17599999904633
to: 15.4639999866486 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.2679999470711
to: 13.2679999470711 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0400000214576721
to: 24.1359999775887 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.105580 1.330509 1.016601 0.216635
0.083669 0.087690 0.077527 0.070678 [error]
Peak 0.076398 0.108974 0.051051 0.041778
0.017208 0.019136 0.015687 0.014574 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 24.176 -0.040 24.136
T90 20.976 1.240 22.216
T50 10.288 5.176 15.464
Peak 1.000 12.268 13.268
====== 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 -1.768 -0.128 0.126 - - - 1.07e-02 -8.04e-04 7.99e-04 56.260 57
CPL -1.389 -0.434 0.528 80.884 -23.275 -80.884 1.67e-02 -6.37e-03 1.36e-02 54.410 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 -2.099 -0.447 0.390 - - - 1.56e-02 -4.25e-03 3.98e-03 60.940 57
CPL -1.991 N/A N/A 5.127 N/A N/A 1.72e-02 N/A N/A 61.030 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 4.26e-07 6.66e-07 7.82e-07 1.78e-06 2.39e-06 3.65e-06 erg/cm2
90%_error_low -4.99e-08 -4.90e-08 -7.71e-08 -3.42e-07 -1.83e-07 -4.13e-07 erg/cm2
90%_error_hi 5.17e-08 4.89e-08 7.67e-08 3.92e-07 1.84e-07 4.48e-07 erg/cm2
Peak flux PL 1.15e+00 8.12e-01 3.79e-01 2.48e-01 2.46e+00 2.58e+00 ph/cm2/s
90%_error_low -3.54e-01 -1.72e-01 -1.32e-01 -1.35e-01 -5.33e-01 -5.48e-01 ph/cm2/s
90%_error_hi 3.80e-01 1.72e-01 1.31e-01 1.99e-01 5.34e-01 5.48e-01 ph/cm2/s
Fluence CPL 3.99e-07 6.91e-07 8.02e-07 1.05e-06 2.34e-06 2.94e-06 erg/cm2
90%_error_low -6.02e-08 -5.83e-08 -8.30e-08 -4.83e-07 -1.97e-07 -5.23e-07 erg/cm2
90%_error_hi 6.12e-08 5.95e-08 8.48e-08 8.49e-07 1.97e-07 8.93e-07 erg/cm2
Peak flux CPL 1.12e+00 7.63e-01 N/A 2.45e-01 2.44e+00 2.55e+00 ph/cm2/s
90%_error_low -3.39e-01 -4.24e-01 -1.32e-01 -2.45e-01 -5.13e-01 N/A ph/cm2/s
90%_error_hi 3.34e-01 2.43e-01 1.31e-01 1.84e-01 5.24e-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 137.0875 -54.4364 0.0100 51.8277 172.1188 3.7220116 19.141 TRIG_00529021 Foreground time interval of the image: -0.040 24.136 (delta_t = 24.176 [sec]) Background time interval of the image: -282.811 -267.604 (delta_t = 15.207 [sec]) -239.512 -0.040 (delta_t = 239.472 [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 -0.040 sec. to 24.136 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.76763 ( -0.127801 0.125577 ) Norm@50keV : 1.07370E-02 ( -0.000803917 0.000798789 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.26 using 59 PHA bins. # Reduced chi-squared = 0.9870 for 57 degrees of freedom # Null hypothesis probability = 5.029133e-01 Photon flux (15-150 keV) in 24.18 sec: 1.46146 ( -0.10936 0.10967 ) ph/cm2/s Energy fluence (15-150 keV) : 2.39374e-06 ( -1.83155e-07 1.84166e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.040 sec. to 24.136 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.38904 ( -0.434116 0.528142 ) Epeak [keV] : 80.8840 ( -23.2744 -80.884 ) Norm@50keV : 1.66689E-02 ( -0.00637165 0.0136086 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.41 using 59 PHA bins. # Reduced chi-squared = 0.9716 for 56 degrees of freedom # Null hypothesis probability = 5.353678e-01 Photon flux (15-150 keV) in 24.18 sec: 1.43344 ( -0.11482 0.11495 ) ph/cm2/s Energy fluence (15-150 keV) : 2.33866e-06 ( -1.96869e-07 1.96802e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 12.268 sec. to 13.268 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.0989 ( -0.447067 0.390241 ) Norm@50keV : 1.56193E-02 ( -0.00425371 0.00397937 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 60.94 using 59 PHA bins. # Reduced chi-squared = 1.069 for 57 degrees of freedom # Null hypothesis probability = 3.361801e-01 Photon flux (15-150 keV) in 1 sec: 2.45619 ( -0.53271 0.53402 ) ph/cm2/s Energy fluence (15-150 keV) : 1.45131e-07 ( -3.46189e-08 3.51168e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 12.268 sec. to 13.268 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.99131 ( ) Epeak [keV] : 5.12652 ( ) Norm@50keV : 1.72134E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.03 using 59 PHA bins. # Reduced chi-squared = 1.090 for 56 degrees of freedom # Null hypothesis probability = 3.001082e-01 Photon flux (15-150 keV) in 1 sec: 2.43566 ( -0.51309 0.52419 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 20.976 sec. Hardness ratio (energy fluence ratio) = 1.17481625077
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.0921766e-06 S(50-150 keV) = 1.3015724e-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 = -1.260021987066310E+00, IMY = -1.744211878268362E-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: -282.811400 -267.604500 -239.512000 -0.040000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5739 -40.5805 3.3 46.0 -171.1 1.2061 3.6 2.6 Vela X-1 170.3448 -60.4657 0.0 46.9 148.3 -1.4939 -2.3 9.5 Cen X-3 216.4911 22.8161 2.3 52.2 8.4 2.9769 5.1 ------ UNKNOWN 120.5398 -43.4308 2.4 57.5 -170.3 4.4711 4.9 ------ UNKNOWN 158.0046 1.8119 3.3 25.8 -91.3 0.8930 3.5 ------ UNKNOWN 145.7339 -5.0220 2.7 33.6 -115.2 1.3167 4.3 ------ UNKNOWN 147.4436 12.6100 2.9 40.8 -88.1 3.5455 3.9 ------ UNKNOWN 134.1042 -4.6307 2.5 44.9 -119.7 3.8766 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.040000 24.136000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5190 -40.6201 3.9 46.0 -171.1 0.2873 3.0 3.9 Vela X-1 170.1952 -60.5208 4.2 47.0 148.4 -0.5219 -2.8 7.1 Cen X-3 213.8605 -23.1753 2.8 34.5 73.5 0.4602 4.1 ------ UNKNOWN 205.7805 -13.5897 1.8 26.3 55.3 0.4405 6.6 ------ UNKNOWN 137.0875 -54.4364 0.6 51.8 172.1 3.7223 19.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 131.788600 962.518000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5250 -40.5605 1.1 13.9 -86.5 5.0133 10.3 0.4 Vela X-1 170.5737 -60.6192 5.7 18.7 41.3 0.9099 2.0 7.6 Cen X-3 186.6511 -62.7769 0.6 26.3 47.0 10.0314 19.6 0.4 GX 301-2 107.0460 -52.9894 2.9 17.7 -179.0 1.6490 4.0 ------ UNKNOWN 181.1050 -28.3003 2.7 41.0 -12.8 2.5129 4.3 ------ UNKNOWN 128.9574 -43.2433 1.3 12.4 -110.2 3.9980 8.8 ------ UNKNOWN 102.5286 -14.6962 2.5 48.0 -129.1 11.1502 4.7 ------ UNKNOWN