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 19:06:54 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger506291
======================================================================
Trigger: 00506291 Segment: 000
BAT Trigger Time: 341304456.512 [s; MET]
Trigger Stop: 341304456.768 [s; MET]
UTC: 2011-10-26T06:47:29.005720 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 244.274664858183 Dec: -47.495033090842 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.37
Image Trigger?: NO
Rate S/N Ratio: 13.0384048104053 [ if not an image trigger ]
Image S/N Ratio: 8.37
Analysis Position: [ source = BAT ]
RA: 244.274664858183 Dec: -47.495033090842 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 244.25637841273 Dec: -47.4386590119999 [deg; J2000]
{ 16h 17m 01.5s , -47d 26' 19.2" }
+/- 1.80533962154832 [arcmin] (estimated 90% radius based on SNR)
+/- 0.790023749399016 [arcmin] (formal 1-sigma fit error)
SNR: 13.0799368189582
Angular difference between the analysis and refined position is 3.462813 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 3.5799999833107 +/- 1.06421802070536
Measured from: 0.0119999647140503
to: 3.59199994802475 [s; relative to TRIGTIME]
T50: 1.54399996995926 +/- 0.518844828199643
Measured from: 0.423999965190887
to: 1.96799993515015 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0
to: 1 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0800000429153442
to: 4.05199998617172 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.092292 0.126686 0.065367 0.010594
0.012936 0.012149 0.010111 0.008339 [error]
Peak 0.039621 0.065672 0.031437 0.009695
0.006632 0.006585 0.005404 0.004220 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 4.132 -0.080 4.052
T90 3.580 0.012 3.592
T50 1.544 0.424 1.968
Peak 1.000 0.000 1.000
====== 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 -1.679 -0.212 0.207 - - - 4.35e-03 -5.64e-04 5.56e-04 53.150 57
CPL -1.089 -0.727 1.030 69.386 -22.341 -69.386 9.18e-03 -5.20e-03 2.47e-02 51.640 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 -1.533 -0.218 0.217 - - - 9.11e-03 -1.20e-03 1.19e-03 60.110 57
CPL -1.075 -0.642 1.355 90.512 -39.966 -90.512 1.64e-02 -8.31e-03 7.93e-02 59.530 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 2.72e-08 4.48e-08 5.59e-08 1.39e-07 1.67e-07 2.67e-07 erg/cm2
90%_error_low -4.97e-09 -5.36e-09 -9.60e-09 -4.35e-08 -2.26e-08 -5.35e-08 erg/cm2
90%_error_hi 5.17e-09 5.35e-09 9.65e-09 5.55e-08 2.30e-08 6.29e-08 erg/cm2
Peak flux PL 3.87e-01 3.82e-01 2.64e-01 2.88e-01 1.15e+00 1.32e+00 ph/cm2/s
90%_error_low -7.98e-02 -5.12e-02 -4.37e-02 -8.54e-02 -1.48e-01 -1.70e-01 ph/cm2/s
90%_error_hi 8.39e-02 5.08e-02 4.35e-02 1.06e-01 1.48e-01 1.71e-01 ph/cm2/s
Fluence CPL 2.54e-08 4.80e-08 5.60e-08 5.41e-08 1.57e-07 1.83e-07 erg/cm2
90%_error_low -5.67e-09 -6.91e-09 -1.10e-08 -3.87e-08 -2.61e-08 -4.76e-08 erg/cm2
90%_error_hi 5.74e-09 7.32e-09 1.05e-08 1.01e-07 2.66e-08 1.08e-07 erg/cm2
Peak flux CPL 3.68e-01 4.04e-01 2.68e-01 1.57e-01 1.13e+00 1.20e+00 ph/cm2/s
90%_error_low -9.15e-02 -6.57e-02 -4.81e-02 N/A -1.55e-01 -2.03e-01 ph/cm2/s
90%_error_hi 9.34e-02 7.68e-02 4.74e-02 N/A 1.53e-01 2.48e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 244.2564 -47.4387 0.0147 14.6611 -149.8393 0.2937930 13.080 TRIG_00506291 Foreground time interval of the image: -0.080 4.052 (delta_t = 4.132 [sec]) Background time interval of the image: -239.512 -0.080 (delta_t = 239.432 [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 -0.080 sec. to 4.052 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.67949 ( -0.211847 0.207159 ) Norm@50keV : 4.35258E-03 ( -0.000564382 0.000556388 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.15 using 59 PHA bins. # Reduced chi-squared = 0.9324 for 57 degrees of freedom # Null hypothesis probability = 6.203318e-01 Photon flux (15-150 keV) in 4.132 sec: 0.574015 ( -0.068703 0.068784 ) ph/cm2/s Energy fluence (15-150 keV) : 1.66829e-07 ( -2.2627e-08 2.30037e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.080 sec. to 4.052 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.08851 ( -0.726518 1.03046 ) Epeak [keV] : 69.3857 ( -22.3411 -69.3856 ) Norm@50keV : 9.17823E-03 ( -0.00519509 0.0246504 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.64 using 59 PHA bins. # Reduced chi-squared = 0.9222 for 56 degrees of freedom # Null hypothesis probability = 6.404075e-01 Photon flux (15-150 keV) in 4.132 sec: 0.559684 ( -0.071723 0.071595 ) ph/cm2/s Energy fluence (15-150 keV) : 1.5704e-07 ( -2.60644e-08 2.65759e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.000 sec. to 1.000 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.53331 ( -0.217612 0.216796 ) Norm@50keV : 9.11082E-03 ( -0.0012043 0.00119431 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 60.11 using 59 PHA bins. # Reduced chi-squared = 1.054 for 57 degrees of freedom # Null hypothesis probability = 3.639074e-01 Photon flux (15-150 keV) in 1 sec: 1.14791 ( -0.14759 0.14779 ) ph/cm2/s Energy fluence (15-150 keV) : 8.59924e-08 ( -1.22767e-08 1.2445e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 1.000 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.07473 ( -0.637381 1.35955 ) Epeak [keV] : 90.5116 ( -40.7739 -91.3191 ) Norm@50keV : 1.63700E-02 ( -0.00813861 0.0795045 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.53 using 59 PHA bins. # Reduced chi-squared = 1.063 for 56 degrees of freedom # Null hypothesis probability = 3.485945e-01 Photon flux (15-150 keV) in 1 sec: 1.12943 ( -0.155278 0.15349 ) ph/cm2/s Energy fluence (15-150 keV) : 8.18031e-08 ( -1.6175e-08 1.51452e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 3.58 sec. Hardness ratio (energy fluence ratio) = 1.24882083873
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 7.195991e-08 S(50-150 keV) = 9.486859e-08
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 = -2.262009851817328E-01, IMY = 1.314445653782226E-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: -239.512000 -0.080000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3165 -60.6278 41.0 57.5 -151.2 0.5149 0.3 0.3 Cen X-3 186.4947 -62.7025 4.9 49.6 -152.1 1.2524 2.3 6.0 GX 301-2 244.9695 -15.6451 0.3 23.4 -37.8 7.3533 34.7 0.6 Sco X-1 255.8235 -37.6757 0.0 1.7 -146.3 -0.1589 -0.8 12.7 4U 1700-377 256.4488 -36.3758 5.1 0.6 -98.1 0.4902 2.2 2.9 GX 349+2 263.0734 -24.6094 6.8 12.8 17.9 0.3589 1.7 8.9 GX 1+4 264.8354 -44.6007 5.2 10.0 140.6 0.4382 2.2 9.9 4U 1735-44 268.3472 -1.4600 4.0 36.4 12.2 0.8164 2.9 1.3 SW J1753.5-0127 270.2871 -25.0805 1.8 15.9 41.6 1.4030 6.5 0.2 GX 5-1 270.2589 -25.8862 3.6 15.3 43.6 0.6576 3.2 8.9 GRS 1758-258 273.9961 -14.0953 4.7 26.8 31.5 0.5944 2.4 3.6 GX 17+2 275.9578 -30.2209 3.6 16.8 67.2 0.6947 3.2 8.9 H1820-303 285.1159 -24.8579 15.7 26.5 65.3 0.2131 0.7 5.7 HT1900.1-2455 263.0020 -33.8054 2.4 5.4 56.4 1.0466 4.8 1.9 GX 354-0 293.3534 -21.1135 3.1 34.9 67.3 1.8354 3.7 ------ UNKNOWN 279.8787 5.5175 2.3 46.9 24.9 2.8593 5.1 ------ UNKNOWN 344.9495 -80.0295 3.8 53.9 160.9 3.8322 3.0 ------ UNKNOWN 155.5851 -72.0313 3.4 59.1 -166.1 4.4149 3.4 ------ UNKNOWN 204.7790 -33.6885 2.8 42.5 -109.2 4.2086 4.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.080000 4.052000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.1717 -60.6097 5.4 57.5 -151.2 -0.3290 -2.1 4.3 Cen X-3 186.4948 -62.8511 8.3 49.6 -152.3 -0.0765 -1.4 6.6 GX 301-2 245.1325 -15.6394 32.6 23.4 -37.4 -0.0086 -0.4 8.8 Sco X-1 255.9220 -37.6861 6.7 1.7 -148.5 -0.0379 -1.7 10.0 4U 1700-377 256.3082 -36.4041 7.1 0.8 -100.1 0.0357 1.6 6.2 GX 349+2 262.8547 -24.6340 8.4 12.7 17.1 -0.0293 -1.4 10.8 GX 1+4 264.9473 -44.5260 5.5 10.0 140.0 -0.0432 -2.1 9.9 4U 1735-44 268.2460 -1.4052 24.8 36.4 12.0 0.0151 0.5 7.8 SW J1753.5-0127 270.2833 -25.0752 31.9 15.9 41.6 -0.0085 -0.4 0.2 GX 5-1 270.1728 -25.8877 728.8 15.2 43.3 -0.0004 -0.0 11.2 GRS 1758-258 274.0050 -14.0365 42.6 26.9 31.4 0.0076 0.3 0.0 GX 17+2 275.9253 -30.3891 280.5 16.7 67.6 -0.0010 -0.0 1.3 H1820-303 285.1057 -24.9979 4.9 26.4 65.6 -0.0773 -2.4 6.0 HT1900.1-2455 263.0080 -33.7301 28.1 5.4 55.7 0.0086 0.4 6.3 GX 354-0 298.6803 -19.1733 2.4 40.1 69.3 0.4025 4.8 ------ UNKNOWN 244.2564 -47.4386 0.9 14.7 -149.8 0.2937 13.1 ------ UNKNOWN 197.6267 -48.0425 2.1 44.5 -131.4 0.3280 5.4 ------ UNKNOWN 230.0260 6.4746 2.3 49.9 -43.2 0.4762 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 491.888600 962.508000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9778 -15.6398 1.3 43.1 -61.6 12.4216 8.9 0.1 Sco X-1 255.9705 -37.7028 17.9 24.4 -90.1 -0.2657 -0.6 8.5 4U 1700-377 256.4551 -36.4094 10.9 24.3 -86.8 0.4373 1.1 1.3 GX 349+2 263.0195 -24.7705 3.2 24.3 -55.0 1.2982 3.6 1.6 GX 1+4 264.8159 -44.6008 5.0 17.8 -109.8 0.8247 2.3 9.6 4U 1735-44 268.3508 -1.4218 3.6 40.4 -20.7 1.4655 3.2 2.1 SW J1753.5-0127 270.2965 -25.0738 1.1 19.2 -43.5 3.0831 10.1 0.7 GX 5-1 270.2789 -25.7628 4.3 18.7 -45.1 0.8325 2.7 1.7 GRS 1758-258 274.0687 -13.8945 3.2 26.7 -20.0 1.2555 3.7 9.3 GX 17+2 275.8583 -30.3673 2.6 12.0 -44.7 1.3747 4.5 3.5 H1820-303 285.1368 -24.9411 12.6 13.2 1.4 0.2817 0.9 5.6 HT1900.1-2455 288.7649 10.9532 3.2 49.0 11.2 3.0355 3.7 2.0 GRS 1915+105 263.0963 -33.8320 2.2 19.7 -76.2 1.9379 5.2 5.3 GX 354-0 307.0439 -12.9702 3.4 30.7 49.7 1.8548 3.4 ------ UNKNOWN 293.7557 15.1872 3.3 53.6 17.0 6.7483 3.5 ------ UNKNOWN 301.6046 -13.9386 2.7 27.3 41.1 1.7797 4.3 ------ UNKNOWN 34.4964 -77.0521 2.5 56.8 174.1 11.0852 4.7 ------ UNKNOWN 138.6310 -81.8189 3.1 59.1 -166.1 8.8081 3.7 ------ UNKNOWN 165.9418 -78.0741 3.8 58.8 -159.2 7.3308 3.0 ------ UNKNOWN 243.4066 -16.5896 2.5 43.7 -64.1 6.4880 4.6 ------ UNKNOWN