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 Mar 3 22:41:25 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger586071
======================================================================
Trigger: 00586071 Segment: 000
BAT Trigger Time: 413623869.504 [s; MET]
Trigger Stop: 413623870.016 [s; MET]
UTC: 2014-02-09T07:30:57.881180 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 81.3347420112946 Dec: 32.477013277617 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.74
Image Trigger?: NO
Rate S/N Ratio: 15.7797338380595 [ if not an image trigger ]
Image S/N Ratio: 9.74
Analysis Position: [ source = BAT ]
RA: 81.3347420112946 Dec: 32.477013277617 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 81.3274012559897 Dec: 32.4884721348062 [deg; J2000]
{ 05h 25m 18.6s , +32d 29' 18.5" }
+/- 0.783788501459089 [arcmin] (estimated 90% radius based on SNR)
+/- 0.222804485578225 [arcmin] (formal 1-sigma fit error)
SNR: 43.0787234971595
Angular difference between the analysis and refined position is 0.781499 arcmin
Partial Coding Fraction: 0.3828125 [ including projection effects ]
Duration
T90: 20.432000041008 +/- 9.62708178563028
Measured from: 1.7039999961853
to: 22.1360000371933 [s; relative to TRIGTIME]
T50: 0.592000067234039 +/- 0.0815843022113378
Measured from: 1.95999997854233
to: 2.55200004577637 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 1.69199997186661
to: 2.69199997186661 [s; relative to TRIGTIME]
Total Fluence
Measured from: 0.15200001001358
to: 27.6240000128746 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.335441 2.107094 1.933753 0.576608
0.062658 0.067747 0.060738 0.047570 [error]
Peak 0.774136 1.555758 1.577069 0.479485
0.024895 0.033797 0.034685 0.022406 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 27.472 0.152 27.624
T90 20.432 1.704 22.136
T50 0.592 1.960 2.552
Peak 1.000 1.692 2.692
====== 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 -1.429 -0.063 0.063 - - - 1.57e-02 -5.53e-04 5.53e-04 52.370 57
CPL -1.162 -0.248 0.263 178.253 -60.891 1069.027 2.07e-02 -4.56e-03 6.24e-03 48.990 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 -1.230 -0.043 0.043 - - - 3.26e-01 -8.36e-03 8.35e-03 58.650 57
CPL -0.739 -0.182 0.190 152.383 -26.477 53.695 5.32e-01 -8.65e-02 1.07e-01 36.280 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 5.16e-07 9.90e-07 1.47e-06 4.70e-06 4.15e-06 7.68e-06 erg/cm2
90%_error_low -3.57e-08 -4.12e-08 -6.06e-08 -4.22e-07 -1.52e-07 -4.57e-07 erg/cm2
90%_error_hi 3.66e-08 4.10e-08 6.04e-08 4.50e-07 1.52e-07 4.78e-07 erg/cm2
Peak flux PL 1.81e-03 2.19e-02 2.40e-01 2.63e+01 1.07e+00 2.59e+01 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A N/A ph/cm2/s
Fluence CPL 4.83e-07 1.01e-06 1.51e-06 3.38e-06 4.10e-06 6.39e-06 erg/cm2
90%_error_low -4.59e-08 -4.44e-08 -7.19e-08 -8.54e-07 -1.60e-07 -8.56e-07 erg/cm2
90%_error_hi 4.70e-08 4.47e-08 7.27e-08 1.21e-06 1.59e-07 1.20e-06 erg/cm2
Peak flux CPL 9.03e+00 1.25e+01 1.11e+01 1.01e+01 3.76e+01 4.27e+01 ph/cm2/s
90%_error_low -6.79e-01 -4.17e-01 -3.81e-01 -1.34e+00 -1.09e+00 -1.78e+00 ph/cm2/s
90%_error_hi 6.95e-01 4.18e-01 3.83e-01 1.60e+00 1.09e+00 1.95e+00 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 81.3274 32.4885 0.0045 44.8609 -159.5211 6.3778061 43.079 TRIG_00586071 Foreground time interval of the image: 0.152 27.624 (delta_t = 27.472 [sec]) Background time interval of the image: -375.203 -322.332 (delta_t = 52.871 [sec]) -239.504 0.152 (delta_t = 239.656 [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 0.152 sec. to 27.624 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.42939 ( -0.0628625 0.0629735 ) Norm@50keV : 1.57204E-02 ( -0.000552818 0.00055273 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.37 using 59 PHA bins. # Reduced chi-squared = 0.9188 for 57 degrees of freedom # Null hypothesis probability = 6.490061e-01 Photon flux (15-150 keV) in 27.47 sec: 1.92766 ( -0.07495 0.07518 ) ph/cm2/s Energy fluence (15-150 keV) : 4.14896e-06 ( -1.51733e-07 1.51934e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.152 sec. to 27.624 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.16202 ( -0.248104 0.2625 ) Epeak [keV] : 178.253 ( -60.8911 1069.03 ) Norm@50keV : 2.07227E-02 ( -0.00456408 0.00623634 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.99 using 59 PHA bins. # Reduced chi-squared = 0.8748 for 56 degrees of freedom # Null hypothesis probability = 7.352638e-01 Photon flux (15-150 keV) in 27.47 sec: 1.89623 ( -0.0799 0.08031 ) ph/cm2/s Energy fluence (15-150 keV) : 4.09957e-06 ( -1.59636e-07 1.59148e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 1.692 sec. to 2.692 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.22966 ( -0.0430742 0.0431811 ) Norm@50keV : 0.325954 ( -0.00835745 0.00835286 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 58.65 using 59 PHA bins. # Reduced chi-squared = 1.029 for 57 degrees of freedom # Null hypothesis probability = 4.146372e-01 Photon flux (15-150 keV) in 1 sec: 1.06565 ( ) ph/cm2/s Energy fluence (15-150 keV) : 3.28027e-06 ( -8.69679e-08 8.7016e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 1.692 sec. to 2.692 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.739282 ( -0.182245 0.189512 ) Epeak [keV] : 152.383 ( -26.4765 53.6952 ) Norm@50keV : 0.532085 ( -0.0864665 0.107242 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 36.28 using 59 PHA bins. # Reduced chi-squared = 0.6479 for 56 degrees of freedom # Null hypothesis probability = 9.810974e-01 Photon flux (15-150 keV) in 1 sec: 37.5956 ( -1.0861 1.0888 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 20.432 sec. Hardness ratio (energy fluence ratio) = 1.48518363
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.5063534e-06 S(50-150 keV) = 2.642604e-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 = -9.322627058378252E-01, IMY = 3.481684036310416E-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: -375.203410 -322.332200 -239.504000 0.152000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6266 22.0095 0.6 50.4 -171.9 11.9818 18.3 0.5 Crab 115.8749 40.4632 2.6 17.7 -179.1 1.1101 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.152000 27.624000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6289 21.8250 0.0 50.5 -172.1 0.2378 1.1 11.4 Crab 139.2645 9.1754 2.4 39.4 107.9 1.3863 4.8 ------ UNKNOWN 157.4625 28.5758 2.2 24.9 65.9 0.5421 5.2 ------ UNKNOWN 190.5623 29.8086 2.6 43.8 25.2 0.7146 4.4 ------ UNKNOWN 94.2929 8.5477 2.9 54.2 167.2 1.6855 4.0 ------ UNKNOWN 114.4034 45.7126 2.4 16.3 -161.3 0.3633 4.8 ------ UNKNOWN 81.3274 32.4885 0.3 44.9 -159.5 6.3777 43.1 ------ UNKNOWN 70.4680 26.3525 2.2 56.0 -157.6 1.8459 5.3 ------ UNKNOWN 63.3025 37.7057 2.1 53.4 -142.2 2.2706 5.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 466.896600 722.646000 900.496000 962.567900 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8271 -15.6195 5.0 24.3 63.3 8.4976 2.3 8.9 Sco X-1 254.3807 35.3569 6.1 47.4 152.9 -19.7876 -1.9 3.9 Her X-1 256.0303 -38.0119 178.0 30.4 9.8 0.2101 0.1 10.3 4U 1700-377 256.4524 -36.4299 5.4 28.8 10.6 -6.8057 -2.1 0.9 GX 349+2 263.0813 -24.7537 10.0 15.8 9.5 3.1960 1.2 4.0 GX 1+4 264.5637 -44.5760 7.1 34.8 -5.2 5.9202 1.6 10.8 4U 1735-44 268.2187 -1.4426 6.5 8.6 163.5 -5.1257 -1.8 9.0 SW J1753.5-0127 270.1483 -24.9517 10.1 15.0 -14.6 -3.2417 -1.1 10.6 GX 5-1 270.1354 -25.8238 4.9 15.9 -14.3 6.5279 2.4 10.2 GRS 1758-258 273.9523 -13.9625 5.2 6.2 -60.5 6.7260 2.2 5.4 GX 17+2 275.9011 -30.2156 5.8 21.2 -27.3 6.0130 2.0 9.2 H1820-303 284.9110 -24.7687 10.1 21.1 -54.3 3.6429 1.1 11.4 HT1900.1-2455 288.7259 10.8141 20.6 28.5 -147.1 -2.0419 -0.6 9.0 GRS 1915+105 299.7056 35.2258 11.2 53.7 -159.7 -10.2409 -1.0 5.8 Cyg X-1 262.9925 -33.8340 29.1 24.5 1.5 -1.2851 -0.4 0.2 GX 354-0 229.6578 -7.0049 3.3 39.1 80.4 44.0240 3.5 ------ UNKNOWN 233.4884 -19.6604 2.8 35.7 59.3 26.2445 4.1 ------ UNKNOWN 236.8420 -27.1063 3.2 34.9 45.4 18.5416 3.6 ------ UNKNOWN 274.3514 -22.1354 2.8 13.2 -32.8 11.9053 4.1 ------ UNKNOWN 259.8167 -66.3876 2.5 56.8 -6.4 56.0883 4.6 ------ UNKNOWN 284.8201 -68.5502 3.7 59.5 -17.4 59.9582 3.1 ------ UNKNOWN UNKNOWN UNKNOWN