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 Nov 23 17:33:56 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger533060
======================================================================
Trigger: 00533060 Segment: 000
BAT Trigger Time: 368847732.864 [s; MET]
Trigger Stop: 368847734.272 [s; MET]
UTC: 2012-09-09T01:42:03.235040 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 275.684892653149 Dec: -59.4263133760398 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.77
Image Trigger?: NO
Rate S/N Ratio: 13 [ if not an image trigger ]
Image S/N Ratio: 7.77
Analysis Position: [ source = BAT ]
RA: 275.684892653149 Dec: -59.4263133760398 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 275.72523148817 Dec: -59.4389804814466 [deg; J2000]
{ 18h 22m 54.1s , -59d 26' 20.3" }
+/- 2.08641847400824 [arcmin] (estimated 90% radius based on SNR)
+/- 0.976648402226871 [arcmin] (formal 1-sigma fit error)
SNR: 10.6372811448241
Angular difference between the analysis and refined position is 1.446602 arcmin
Partial Coding Fraction: 0.4882812 [ including projection effects ]
Duration
T90: 220.595999956131 +/- 304.966835064435
Measured from: 253.227999985218
to: 473.823999941349 [s; relative to TRIGTIME]
T50: 114.503999948502 +/- 363.404444880196
Measured from: 297.243999958038
to: 411.74799990654 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.899999976158142
to: 1.89999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: -31.460000038147
to: 566.708000004292 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.885854 3.884830 3.568242 1.009578
0.195425 0.200093 0.185861 0.190517 [error]
Peak 0.033339 0.076469 0.094177 0.023912
0.009553 0.010755 0.010425 0.010719 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 598.168 -31.460 566.708
T90 220.596 253.228 473.824
T50 114.504 297.244 411.748
Peak 1.000 0.900 1.900
====== 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 -1.369 -0.100 0.101 - - - 1.29e-03 -7.00e-05 6.99e-05 48.110 57
CPL -1.284 -0.134 0.395 442.369 -442.369 -442.369 1.42e-03 -1.88e-04 7.49e-04 47.960 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 -1.015 -0.232 0.241 - - - 1.57e-02 -2.23e-03 2.22e-03 49.930 57
CPL 0.411 -1.184 1.679 97.758 -24.288 173.853 6.52e-02 -6.52e-02 2.35e-01 45.510 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 8.71e-07 1.73e-06 2.69e-06 9.13e-06 7.50e-06 1.44e-05 erg/cm2
90%_error_low -8.91e-08 -1.05e-07 -1.84e-07 -1.34e-06 -4.50e-07 -1.47e-06 erg/cm2
90%_error_hi 9.22e-08 1.05e-07 1.84e-07 1.50e-06 4.53e-07 1.60e-06 erg/cm2
Peak flux PL 4.07e-01 5.47e-01 5.41e-01 9.64e-01 1.81e+00 2.46e+00 ph/cm2/s
90%_error_low -1.10e-01 -9.68e-02 -8.13e-02 -2.74e-01 -2.61e-01 -3.64e-01 ph/cm2/s
90%_error_hi 1.21e-01 9.55e-02 8.06e-02 3.38e-01 2.62e-01 3.77e-01 ph/cm2/s
Fluence CPL 8.56e-07 1.75e-06 2.70e-06 8.01e-06 7.45e-06 1.33e-05 erg/cm2
90%_error_low -1.09e-07 -1.10e-07 -1.93e-07 -3.39e-06 -5.02e-07 -3.40e-06 erg/cm2
90%_error_hi 9.46e-08 1.19e-07 2.00e-07 3.21e-06 4.24e-07 1.57e-06 erg/cm2
Peak flux CPL 2.72e-01 5.73e-01 6.24e-01 3.39e-01 1.70e+00 1.81e+00 ph/cm2/s
90%_error_low -1.37e-01 -1.16e-01 -1.07e-01 -1.85e-01 -2.82e-01 -3.52e-01 ph/cm2/s
90%_error_hi 1.58e-01 1.13e-01 1.11e-01 4.41e-01 2.81e-01 5.01e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 275.7252 -59.4390 0.0181 40.4914 4.1902 2.1358034 10.637 TRIG_00533060 Foreground time interval of the image: -31.460 23.037 (delta_t = 54.497 [sec]) Background time interval of the image: -60.864 -31.460 (delta_t = 29.404 [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 -31.460 sec. to 566.708 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.36879 ( -0.100446 0.10073 ) Norm@50keV : 1.28883E-03 ( -6.99931e-05 6.9938e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.11 using 59 PHA bins. # Reduced chi-squared = 0.8441 for 57 degrees of freedom # Null hypothesis probability = 7.929164e-01 Photon flux (15-150 keV) in 598.2 sec: 0.155882 ( -0.00881 0.008837 ) ph/cm2/s Energy fluence (15-150 keV) : 7.49975e-06 ( -4.50284e-07 4.52797e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -31.460 sec. to 566.708 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.28366 ( -0.134065 0.39524 ) Epeak [keV] : 442.369 ( -443.112 -443.112 ) Norm@50keV : 1.41645E-03 ( -0.000188239 0.000749459 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.96 using 59 PHA bins. # Reduced chi-squared = 0.8564 for 56 degrees of freedom # Null hypothesis probability = 7.689805e-01 Photon flux (15-150 keV) in 598.2 sec: 0.155117 ( -0.009402 0.009196 ) ph/cm2/s Energy fluence (15-150 keV) : 7.44968e-06 ( -5.02058e-07 4.24153e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.900 sec. to 1.900 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.01501 ( -0.232382 0.241091 ) Norm@50keV : 1.56945E-02 ( -0.00222654 0.00221698 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.93 using 59 PHA bins. # Reduced chi-squared = 0.8760 for 57 degrees of freedom # Null hypothesis probability = 7.350502e-01 Photon flux (15-150 keV) in 1 sec: 1.80843 ( -0.26107 0.26223 ) ph/cm2/s Energy fluence (15-150 keV) : 1.68834e-07 ( -2.51925e-08 2.53753e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.900 sec. to 1.900 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.411103 ( -1.18398 1.67863 ) Epeak [keV] : 97.7577 ( -24.2854 173.856 ) Norm@50keV : 6.52071E-02 ( -0.0652133 0.235029 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 45.51 using 59 PHA bins. # Reduced chi-squared = 0.8126 for 56 degrees of freedom # Null hypothesis probability = 8.406271e-01 Photon flux (15-150 keV) in 1 sec: 1.69589 ( -0.28221 0.28059 ) ph/cm2/s Energy fluence (15-150 keV) : 1.38966e-08 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = N/A sec. Hardness ratio (energy fluence ratio) = N/A
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = N/A S(50-150 keV) = N/A
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 = 8.515402123272447E-01, IMY = -6.238669160080063E-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: -60.864000 -31.460000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.0549 -60.5389 2456.5 40.8 -71.3 -0.0006 -0.0 9.2 Cen X-3 186.9783 -62.7919 26.9 40.7 -58.5 0.0513 0.4 8.9 GX 301-2 264.7704 -44.4074 5.0 56.8 1.1 0.6370 2.3 2.8 4U 1735-44 275.7364 -59.4338 0.6 40.5 4.2 1.3449 17.7 ------ UNKNOWN 101.7010 -29.1276 2.9 55.1 -145.1 1.0798 3.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -31.460000 23.036600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.2582 -60.5920 16.9 40.8 -71.1 0.2754 0.7 2.5 Cen X-3 186.6956 -62.6996 6.5 40.7 -58.7 0.6117 1.8 4.4 GX 301-2 264.6946 -44.4251 10.2 56.8 1.0 -0.8679 -1.1 2.6 4U 1735-44 275.7300 -59.4379 1.1 40.5 4.2 2.1896 10.9 ------ UNKNOWN 209.9058 -58.2303 2.7 46.6 -43.2 1.5507 4.3 ------ UNKNOWN 139.2037 -53.8083 2.9 41.3 -98.5 2.1410 3.9 ------ UNKNOWN 123.0414 -46.3574 2.4 44.3 -116.8 2.8270 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 82.636600 135.636600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.5460 -60.7321 0.0 46.7 -126.5 0.3331 0.9 9.4 Cen X-3 186.5940 -62.8420 9.9 39.7 -121.3 -0.2379 -1.2 4.6 GX 301-2 245.0246 -15.6568 2.3 49.2 -27.4 1.0542 5.0 2.8 Sco X-1 256.0839 -37.7542 2.7 25.0 -25.8 0.3621 4.2 7.1 4U 1700-377 256.4337 -36.3695 4.7 26.2 -23.9 0.2141 2.4 3.2 GX 349+2 263.1372 -24.6192 9.1 35.9 -6.7 -0.1480 -1.3 10.3 GX 1+4 264.9131 -44.5477 6.4 16.2 -15.4 0.1564 1.8 9.3 4U 1735-44 270.4423 -25.1987 6.2 34.4 4.6 -0.2241 -1.9 11.2 GX 5-1 270.4680 -25.8669 4.7 33.7 4.6 0.2851 2.4 11.6 GRS 1758-258 274.0776 -14.1613 5.4 45.3 10.8 0.3878 2.2 8.6 GX 17+2 275.8827 -30.2830 3.2 29.1 13.4 0.3816 3.5 5.5 H1820-303 285.2140 -25.0264 10.2 35.0 28.2 0.1475 1.1 11.6 HT1900.1-2455 262.8491 -33.7190 4.8 27.1 -10.9 0.2256 2.4 9.8 GX 354-0 271.3724 -21.2759 2.6 38.3 6.5 0.5635 4.4 ------ UNKNOWN 275.7560 -59.4912 1.3 0.1 168.8 0.7153 8.9 ------ UNKNOWN