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: Sun Jan 12 00:52:23 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger559139
======================================================================
Trigger: 00559139 Segment: 000
BAT Trigger Time: 394027261.376 [s; MET]
Trigger Stop: 394027263.424 [s; MET]
UTC: 2013-06-27T12:00:50.652640 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 181.932229853194 Dec: -55.7299343575035 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.71
Image Trigger?: NO
Rate S/N Ratio: 9.8488578017961 [ if not an image trigger ]
Image S/N Ratio: 9.71
Analysis Position: [ source = BAT ]
RA: 181.932229853194 Dec: -55.7299343575035 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 181.941429405079 Dec: -55.711410911521 [deg; J2000]
{ 12h 07m 45.9s , -55d 42' 41.1" }
+/- 1.77330293293361 [arcmin] (estimated 90% radius based on SNR)
+/- 0.669317702120276 [arcmin] (formal 1-sigma fit error)
SNR: 13.4188157850946
Angular difference between the analysis and refined position is 1.154069 arcmin
Partial Coding Fraction: 0.953125 [ including projection effects ]
Duration
T90: 48 +/- 35.7770876399966
Measured from: -15.3759999871254
to: 32.6240000128746 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: -15.3759999871254
to: 16.6240000128746 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 8.1240000128746
to: 9.1240000128746 [s; relative to TRIGTIME]
Total Fluence
Measured from: -15.3759999871254
to: 48.6240000128746 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.453614 0.587924 0.361326 0.062114
0.048637 0.050751 0.045570 0.042871 [error]
Peak 0.018251 0.017612 0.006752 0.010097
0.006398 0.006456 0.005674 0.005330 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 64.000 -15.376 48.624
T90 48.000 -15.376 32.624
T50 32.000 -15.376 16.624
Peak 1.000 8.124 9.124
====== 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 -1.751 -0.188 0.181 - - - 1.40e-03 -1.66e-04 1.63e-04 55.700 57
CPL -0.901 -0.779 0.954 56.940 -12.777 111.748 4.13e-03 -2.57e-03 9.79e-03 52.190 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 -2.163 -1.351 0.946 - - - 2.14e-03 -2.14e-03 1.43e-03 75.830 57
CPL -2.153 -1.114 5.677 63.044 N/A N/A 1.80e-03 N/A N/A 75.650 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 1.45e-07 2.28e-07 2.71e-07 6.25e-07 8.25e-07 1.27e-06 erg/cm2
90%_error_low -2.14e-08 -2.30e-08 -4.34e-08 -1.82e-07 -1.01e-07 -2.29e-07 erg/cm2
90%_error_hi 2.21e-08 2.30e-08 4.39e-08 2.26e-07 1.03e-07 2.65e-07 erg/cm2
Peak flux PL 1.67e-01 1.14e-01 5.09e-02 3.15e-02 3.47e-01 3.63e-01 ph/cm2/s
90%_error_low -1.67e-01 -6.01e-02 -4.09e-02 -3.15e-02 -1.49e-01 -1.61e-01 ph/cm2/s
90%_error_hi 9.42e-02 5.15e-02 5.14e-02 1.01e-01 1.49e-01 1.67e-01 ph/cm2/s
Fluence CPL 1.32e-07 2.51e-07 2.68e-07 1.76e-07 7.58e-07 8.26e-07 erg/cm2
90%_error_low -2.51e-08 -3.10e-08 -5.10e-08 -1.16e-07 -1.10e-07 -1.63e-07 erg/cm2
90%_error_hi 2.52e-08 3.22e-08 4.91e-08 3.73e-07 1.17e-07 3.82e-07 erg/cm2
Peak flux CPL N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_low -1.67e-01 -6.01e-02 -4.09e-02 -3.15e-02 -1.49e-01 -1.61e-01 ph/cm2/s
90%_error_hi 9.42e-02 5.15e-02 5.14e-02 1.01e-01 1.49e-01 1.67e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 181.9414 -55.7114 0.0144 18.7160 164.4849 1.4880837 13.419 TRIG_00559139 Foreground time interval of the image: -15.376 48.624 (delta_t = 64.000 [sec]) Background time interval of the image: -239.376 -15.376 (delta_t = 224.000 [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 -15.376 sec. to 48.624 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.75135 ( -0.187857 0.180513 ) Norm@50keV : 1.39662E-03 ( -0.000166032 0.000163022 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.70 using 59 PHA bins. # Reduced chi-squared = 0.9773 for 57 degrees of freedom # Null hypothesis probability = 5.238171e-01 Photon flux (15-150 keV) in 64 sec: 0.188950 ( -0.019066 0.019069 ) ph/cm2/s Energy fluence (15-150 keV) : 8.24838e-07 ( -1.00653e-07 1.0276e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -15.376 sec. to 48.624 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.901135 ( -0.779047 0.953638 ) Epeak [keV] : 56.9403 ( -12.777 111.748 ) Norm@50keV : 4.13200E-03 ( -0.00256649 0.00979242 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.19 using 59 PHA bins. # Reduced chi-squared = 0.9320 for 56 degrees of freedom # Null hypothesis probability = 6.197353e-01 Photon flux (15-150 keV) in 64 sec: 0.182195 ( -0.019974 0.019993 ) ph/cm2/s Energy fluence (15-150 keV) : 7.57581e-07 ( -1.10438e-07 1.17484e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 8.124 sec. to 9.124 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.16263 ( -1.35068 0.946296 ) Norm@50keV : 2.13889E-03 ( -0.00213834 0.00143057 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 75.83 using 59 PHA bins. # Reduced chi-squared = 1.330 for 57 degrees of freedom # Null hypothesis probability = 4.840610e-02 Photon flux (15-150 keV) in 1 sec: 0.347311 ( -0.149143 0.149037 ) ph/cm2/s Energy fluence (15-150 keV) : 2.00106e-08 ( -1.11946e-08 1.32776e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 8.124 sec. to 9.124 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.15301 ( -1.11309 5.67721 ) Epeak [keV] : 63.0439 ( ) Norm@50keV : 1.80127E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 75.65 using 59 PHA bins. # Reduced chi-squared = 1.351 for 56 degrees of freedom # Null hypothesis probability = 4.124090e-02 Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s Energy fluence (15-150 keV) : 1.27192e-08 ( -8.91862e-09 1.78934e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 48.0 sec. Hardness ratio (energy fluence ratio) = 1.18811926793
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 3.725347e-07 S(50-150 keV) = 4.523125e-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 = -3.264463825353017E-01, IMY = -9.062415982562974E-02
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: -239.376000 -15.376000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.7538 -40.5787 0.0 37.6 -130.7 -0.6115 -1.7 10.4 Vela X-1 170.3957 -60.4721 5.6 25.0 176.5 0.4343 2.0 9.4 Cen X-3 186.5098 -62.8092 6.6 25.8 157.9 0.4260 1.8 4.7 GX 301-2 162.0372 -63.2984 1.9 29.5 -179.6 1.4262 6.1 ------ UNKNOWN 96.7173 -56.1445 4.1 58.8 -159.3 4.6544 2.8 ------ UNKNOWN 175.7229 19.0834 3.9 56.8 -29.7 3.6408 2.9 ------ UNKNOWN 145.6715 -14.8987 3.7 40.9 -87.5 3.3848 3.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -15.376000 48.624000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5132 -40.4741 11.3 37.8 -130.6 0.1839 1.0 4.9 Vela X-1 170.2910 -60.5632 27.7 25.1 176.5 0.0502 0.4 3.7 Cen X-3 186.4326 -62.8698 5.5 25.8 158.0 0.2617 2.1 8.6 GX 301-2 231.1228 -82.8988 2.1 48.3 153.2 2.1955 5.4 ------ UNKNOWN 181.9414 -55.7114 0.9 18.7 164.5 1.4880 13.4 ------ UNKNOWN 186.2524 -8.6393 2.1 28.5 -16.1 0.6337 5.4 ------ UNKNOWN 183.1271 12.6562 2.4 49.7 -21.5 1.2029 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 215.124600 898.524610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.2636 35.2942 7.3 46.7 -167.5 1.5522 1.6 9.9 Her X-1 263.0188 -24.7546 26.4 34.9 92.5 -0.5372 -0.4 0.8 GX 1+4 268.4654 -1.4994 3.7 19.4 134.8 1.7147 3.1 6.5 SW J1753.5-0127 270.2281 -25.0934 10.9 30.8 83.1 1.0445 1.1 3.2 GX 5-1 270.3666 -25.8289 4.4 31.3 82.1 2.7328 2.6 6.2 GRS 1758-258 274.0831 -14.0185 2.8 19.9 93.3 2.3067 4.2 4.6 GX 17+2 275.9638 -30.4729 49.9 33.0 69.7 0.2395 0.2 6.7 H1820-303 285.0444 -24.7544 12.2 25.4 56.6 0.5656 0.9 10.0 HT1900.1-2455 288.8075 10.9443 0.8 10.5 -123.8 7.2051 15.0 0.5 GRS 1915+105 299.5558 35.2025 3.1 36.4 -112.9 4.2846 3.7 1.7 Cyg X-1 272.5821 16.6705 2.5 22.0 -171.3 2.3668 4.6 ------ UNKNOWN 244.7311 31.8429 2.3 51.3 -177.2 7.1759 5.0 ------ UNKNOWN 241.3451 41.6600 2.9 58.6 -168.6 11.9842 4.0 ------ UNKNOWN 289.2932 38.8182 3.2 38.3 -127.3 3.0937 3.6 ------ UNKNOWN 345.7728 -11.0288 4.2 58.8 -26.0 10.4132 2.8 ------ UNKNOWN