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 03:28:14 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger526593
======================================================================
Trigger: 00526593 Segment: 000
BAT Trigger Time: 363944816.192 [s; MET]
Trigger Stop: 363944818.24 [s; MET]
UTC: 2012-07-14T07:46:46.767960 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 167.96954977866 Dec: -30.6319671895596 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.2
Image Trigger?: NO
Rate S/N Ratio: 15.2315462117278 [ if not an image trigger ]
Image S/N Ratio: 10.2
Analysis Position: [ source = BAT ]
RA: 167.96954977866 Dec: -30.6319671895596 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 167.981061803223 Dec: -30.6346942390255 [deg; J2000]
{ 11h 11m 55.5s , -30d 38' 04.9" }
+/- 1.5161020776006 [arcmin] (estimated 90% radius based on SNR)
+/- 0.559628084628213 [arcmin] (formal 1-sigma fit error)
SNR: 16.7855234907467
Angular difference between the analysis and refined position is 0.616440 arcmin
Partial Coding Fraction: 0.4023438 [ including projection effects ]
Duration
T90: 20 +/- 4.47213595499958
Measured from: -0.191999971866608
to: 19.8080000281334 [s; relative to TRIGTIME]
T50: 8 +/- 3.16227766016838
Measured from: 1.80800002813339
to: 9.80800002813339 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.80800002813339
to: 4.80800002813339 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.19199997186661
to: 22.8080000281334 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.413886 0.575760 0.378513 0.068651
0.046545 0.048132 0.042471 0.037552 [error]
Peak 0.034879 0.075789 0.044532 0.007541
0.009720 0.010482 0.009221 0.007787 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 24.000 -1.192 22.808
T90 20.000 -0.192 19.808
T50 8.000 1.808 9.808
Peak 1.000 3.808 4.808
====== 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 -1.670 -0.171 0.168 - - - 4.00e-03 -4.23e-04 4.19e-04 61.040 57
CPL -1.126 -0.607 0.727 75.064 -22.108 -75.064 7.82e-03 -3.99e-03 1.10e-02 58.810 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 -1.741 -0.282 0.265 - - - 9.87e-03 -1.97e-03 1.95e-03 63.490 57
CPL -0.477 -1.060 1.523 60.530 -16.632 58.191 4.45e-02 -4.45e-02 2.65e-01 59.140 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 1.44e-07 2.38e-07 2.99e-07 7.50e-07 8.91e-07 1.43e-06 erg/cm2
90%_error_low -2.19e-08 -2.38e-08 -4.16e-08 -1.94e-07 -9.90e-08 -2.37e-07 erg/cm2
90%_error_hi 2.27e-08 2.37e-08 4.17e-08 2.35e-07 1.00e-07 2.68e-07 erg/cm2
Peak flux PL 5.12e-01 4.47e-01 2.68e-01 2.41e-01 1.33e+00 1.47e+00 ph/cm2/s
90%_error_low -1.37e-01 -8.72e-02 -6.41e-02 -9.31e-02 -2.58e-01 -2.79e-01 ph/cm2/s
90%_error_hi 1.46e-01 8.69e-02 6.33e-02 1.15e-01 2.58e-01 2.79e-01 ph/cm2/s
Fluence CPL 1.34e-07 2.54e-07 3.05e-07 3.29e-07 8.51e-07 1.02e-06 erg/cm2
90%_error_low -2.50e-08 -2.97e-08 -4.56e-08 -1.93e-07 -1.09e-07 -2.24e-07 erg/cm2
90%_error_hi 2.53e-08 3.08e-08 4.56e-08 4.92e-07 1.10e-07 5.12e-07 erg/cm2
Peak flux CPL 4.22e-01 5.20e-01 3.11e-01 8.93e-02 1.32e+00 1.34e+00 ph/cm2/s
90%_error_low -1.53e-01 -1.09e-01 -8.43e-02 -8.93e-02 -2.58e-01 -2.68e-01 ph/cm2/s
90%_error_hi 1.63e-01 1.17e-01 8.46e-02 1.28e-01 2.58e-01 2.74e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 167.9811 -30.6347 0.0114 37.4398 -51.1695 1.5996273 16.786 TRIG_00526593 Foreground time interval of the image: -1.192 22.808 (delta_t = 24.000 [sec]) Background time interval of the image: -239.192 -1.192 (delta_t = 238.000 [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 -1.192 sec. to 22.808 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.66966 ( -0.171022 0.167786 ) Norm@50keV : 3.99805E-03 ( -0.000423266 0.00041892 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.04 using 59 PHA bins. # Reduced chi-squared = 1.071 for 57 degrees of freedom # Null hypothesis probability = 3.330145e-01 Photon flux (15-150 keV) in 24 sec: 0.525503 ( -0.052436 0.052493 ) ph/cm2/s Energy fluence (15-150 keV) : 8.90844e-07 ( -9.90154e-08 1.00105e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.192 sec. to 22.808 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.12568 ( -0.607432 0.726718 ) Epeak [keV] : 75.0642 ( -22.1079 -75.0644 ) Norm@50keV : 7.81940E-03 ( -0.0039943 0.0110404 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 58.81 using 59 PHA bins. # Reduced chi-squared = 1.050 for 56 degrees of freedom # Null hypothesis probability = 3.729921e-01 Photon flux (15-150 keV) in 24 sec: 0.514701 ( -0.053922 0.053923 ) ph/cm2/s Energy fluence (15-150 keV) : 8.51338e-07 ( -1.08573e-07 1.09702e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 3.808 sec. to 4.808 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.74064 ( -0.282292 0.26495 ) Norm@50keV : 9.86999E-03 ( -0.00197421 0.00195248 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.49 using 59 PHA bins. # Reduced chi-squared = 1.114 for 57 degrees of freedom # Null hypothesis probability = 2.583420e-01 Photon flux (15-150 keV) in 1 sec: 1.33001 ( -0.25773 0.25823 ) ph/cm2/s Energy fluence (15-150 keV) : 9.11465e-08 ( -1.85326e-08 1.86251e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.808 sec. to 4.808 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.47691 ( -1.05955 1.52337 ) Epeak [keV] : 60.5296 ( -16.6323 58.1911 ) Norm@50keV : 4.44611E-02 ( -0.0444598 0.265375 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.14 using 59 PHA bins. # Reduced chi-squared = 1.056 for 56 degrees of freedom # Null hypothesis probability = 3.616642e-01 Photon flux (15-150 keV) in 1 sec: 1.32081 ( -0.25751 0.25837 ) ph/cm2/s Energy fluence (15-150 keV) : 8.99146e-08 ( -2.00528e-08 1.95869e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 20.0 sec. Hardness ratio (energy fluence ratio) = 1.2573319082
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 3.818047e-07 S(50-150 keV) = 5.090416e-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 = 4.800827972092739E-01, IMY = 5.964525613567480E-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: -239.192000 -1.192000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.0988 -60.5929 3.9 13.4 -99.4 0.6138 3.0 6.6 Cen X-3 186.7102 -62.7814 1.8 5.2 -101.8 1.3419 6.5 1.6 GX 301-2 354.6468 -74.8553 2.8 41.6 165.1 1.5874 4.1 ------ UNKNOWN 159.4728 -47.6744 3.3 26.1 -78.9 0.9115 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -1.192000 22.808000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.6548 -60.6349 5.5 13.1 -99.2 0.1215 2.1 10.0 Cen X-3 186.3168 -62.7681 11.9 5.4 -101.8 -0.0539 -1.0 9.3 GX 301-2 284.1891 -62.9162 2.4 36.3 124.1 0.5952 4.8 ------ UNKNOWN 22.2396 -62.7689 2.5 54.5 176.5 1.0298 4.6 ------ UNKNOWN 41.1719 -65.0559 2.3 51.1 -173.6 0.6504 5.1 ------ UNKNOWN 167.9811 -30.6347 0.7 37.4 -51.2 1.5997 16.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 319.508600 962.880800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9770 -15.6432 0.3 38.2 -166.0 31.3403 39.6 0.2 Sco X-1 255.9733 -37.9165 7.9 42.0 156.4 1.7813 1.5 4.4 4U 1700-377 256.3844 -36.4229 2.4 40.7 157.5 5.1185 4.8 2.5 GX 349+2 263.0998 -24.8528 14.4 28.2 163.3 0.5145 0.8 8.1 GX 1+4 264.7688 -44.3186 4.4 43.9 143.1 4.3818 2.7 8.0 4U 1735-44 268.4228 -1.5083 3.9 13.3 -138.0 1.5889 3.0 4.7 SW J1753.5-0127 270.2825 -25.1386 2.2 24.7 151.0 3.0555 5.2 3.6 GX 5-1 270.1325 -25.6712 18.1 25.2 150.7 0.4086 0.6 10.2 GRS 1758-258 273.9833 -14.0003 1.9 13.3 159.8 3.2482 6.2 2.5 GX 17+2 276.1434 -30.4198 14.0 27.9 135.9 -0.6037 -0.8 11.7 H1820-303 284.9938 -24.9794 10.2 22.2 117.6 0.7333 1.1 4.2 HT1900.1-2455 288.7873 10.9423 0.6 15.7 -27.3 10.1208 19.1 0.7 GRS 1915+105 299.5817 35.1501 2.0 41.7 -32.0 4.9811 5.8 3.1 Cyg X-1 308.0190 40.9522 5.0 50.1 -28.3 3.4540 2.3 4.1 Cyg X-3 326.1938 38.3665 7.9 58.3 -14.0 -5.1825 -1.5 2.9 Cyg X-2 262.9746 -33.7839 3.6 35.3 153.1 2.8219 3.2 3.1 GX 354-0 282.8189 43.9574 3.0 47.0 -53.1 10.8250 3.8 ------ UNKNOWN