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 02:02:10 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger530031
======================================================================
Trigger: 00530031 Segment: 000
BAT Trigger Time: 365894899.392 [s; MET]
Trigger Stop: 365894907.584 [s; MET]
UTC: 2012-08-05T21:28:09.886740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 216.533341737596 Dec: 5.80233114541574 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.44
Image Trigger?: NO
Rate S/N Ratio: 8.18535277187245 [ if not an image trigger ]
Image S/N Ratio: 8.44
Analysis Position: [ source = BAT ]
RA: 216.533341737596 Dec: 5.80233114541574 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 216.535850685373 Dec: 5.85246087633791 [deg; J2000]
{ 14h 26m 08.6s , +05d 51' 08.9" }
+/- 2.12347681179799 [arcmin] (estimated 90% radius based on SNR)
+/- 0.753481091534828 [arcmin] (formal 1-sigma fit error)
SNR: 10.3730777475377
Angular difference between the analysis and refined position is 3.011510 arcmin
Partial Coding Fraction: 0.3789062 [ including projection effects ]
Duration
T90: 48 +/- 22.6274169979695
Measured from: -13.3920000195503
to: 34.6079999804497 [s; relative to TRIGTIME]
T50: 32 +/- 16
Measured from: -13.3920000195503
to: 18.6079999804497 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 10.1079999804497
to: 11.1079999804497 [s; relative to TRIGTIME]
Total Fluence
Measured from: -13.3920000195503
to: 34.6079999804497 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.122604 0.486728 0.382732 0.154389
0.069091 0.062391 0.055052 0.048611 [error]
Peak 0.005921 0.007939 0.009432 -0.007827
0.009939 0.008788 0.007851 0.006976 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 48.000 -13.392 34.608
T90 48.000 -13.392 34.608
T50 32.000 -13.392 18.608
Peak 1.000 10.108 11.108
====== 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 -1.213 -0.258 0.269 - - - 1.73e-03 -2.69e-04 2.68e-04 64.070 57
CPL -0.183 -1.107 1.518 94.805 -29.798 -94.805 5.27e-03 -5.27e-03 2.04e-02 61.630 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 -1.758 1.758 1.758 - - - 1.30e-03 -1.30e-03 1.81e-03 48.090 57
CPL 0.359 N/A N/A 53.416 N/A N/A 1.71e-02 N/A N/A 47.610 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 8.12e-08 1.78e-07 3.07e-07 1.23e-06 8.41e-07 1.79e-06 erg/cm2
90%_error_low -2.37e-08 -3.36e-08 -5.24e-08 -4.06e-07 -1.34e-07 -4.43e-07 erg/cm2
90%_error_hi 2.63e-08 3.30e-08 5.19e-08 5.35e-07 1.35e-07 5.48e-07 erg/cm2
Peak flux PL 6.06e-02 5.70e-02 3.74e-02 3.51e-02 1.72e-01 1.91e-01 ph/cm2/s
90%_error_low -6.06e-02 -5.70e-02 -3.74e-02 -3.51e-02 -1.72e-01 -1.91e-01 ph/cm2/s
90%_error_hi 1.42e-01 7.95e-02 5.88e-02 5.70e-01 2.35e-01 2.59e-01 ph/cm2/s
Fluence CPL 6.49e-08 1.92e-07 3.32e-07 3.76e-07 7.86e-07 9.65e-07 erg/cm2
90%_error_low -2.74e-08 -3.88e-08 -6.11e-08 N/A -1.51e-07 -2.95e-07 erg/cm2
90%_error_hi 3.11e-08 4.05e-08 6.32e-08 N/A 1.50e-07 1.14e-06 erg/cm2
Peak flux CPL 6.34e-02 1.24e-01 1.73e-03 7.48e-09 1.45e-01 1.45e-01 ph/cm2/s
90%_error_low -6.34e-02 -1.24e-01 -1.73e-03 -7.48e-09 -1.45e-01 -1.45e-01 ph/cm2/s
90%_error_hi 1.34e-01 1.06e-01 1.09e-01 6.84e-02 2.27e-01 2.27e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 216.5359 5.8525 0.0185 38.4594 -46.5122 1.3109695 10.373 TRIG_00530031 Foreground time interval of the image: -13.392 34.608 (delta_t = 48.000 [sec]) Background time interval of the image: -239.392 -13.392 (delta_t = 226.000 [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 -13.392 sec. to 34.608 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.21311 ( -0.258123 0.26947 ) Norm@50keV : 1.73226E-03 ( -0.000269435 0.000268486 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 64.07 using 59 PHA bins. # Reduced chi-squared = 1.124 for 57 degrees of freedom # Null hypothesis probability = 2.423831e-01 Photon flux (15-150 keV) in 48 sec: 0.203720 ( -0.033551 0.033928 ) ph/cm2/s Energy fluence (15-150 keV) : 8.40566e-07 ( -1.34312e-07 1.351e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -13.392 sec. to 34.608 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.182646 ( -1.10672 1.51802 ) Epeak [keV] : 94.8047 ( -29.8049 -94.8111 ) Norm@50keV : 5.26964E-03 ( -0.00526847 0.0203842 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.63 using 59 PHA bins. # Reduced chi-squared = 1.101 for 56 degrees of freedom # Null hypothesis probability = 2.816174e-01 Photon flux (15-150 keV) in 48 sec: 0.194061 ( -0.034836 0.035385 ) ph/cm2/s Energy fluence (15-150 keV) : 7.86379e-07 ( -1.51266e-07 1.49762e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 10.108 sec. to 11.108 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.75848 ( 1.52642 1.52642 ) Norm@50keV : 1.30162E-03 ( -0.00130165 0.0018086 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.09 using 59 PHA bins. # Reduced chi-squared = 0.8437 for 57 degrees of freedom # Null hypothesis probability = 7.935663e-01 Photon flux (15-150 keV) in 1 sec: 0.172455 ( -0.172455 0.235072 ) ph/cm2/s Energy fluence (15-150 keV) : 1.22079e-08 ( 1 1.79596e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 10.108 sec. to 11.108 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 9.98648 ( ) Epeak [keV] : 30.8463 ( ) Norm@50keV : 1.51565E+05 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 46.88 using 59 PHA bins. # Reduced chi-squared = 0.8371 for 56 degrees of freedom # Null hypothesis probability = 8.023039e-01 Photon flux (15-150 keV) in 1 sec: 0.145123 ( -0.145123 0.226798 ) ph/cm2/s Energy fluence (15-150 keV) : 1.09853e-08 ( 1 1.78119e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 48.0 sec. Hardness ratio (energy fluence ratio) = 1.72532159897
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.5914559e-07 S(50-150 keV) = 5.814318e-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 = 5.466238681313339E-01, IMY = 5.762675584740097E-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: -239.392000 -13.392000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3226 -60.6305 83.0 52.4 -164.3 0.0935 0.1 0.5 Cen X-3 186.6381 -62.8095 1.8 45.6 -169.9 2.8671 6.5 2.4 GX 301-2 244.9804 -15.6446 0.2 16.6 22.2 14.3390 63.7 0.3 Sco X-1 256.0681 -37.8201 1.8 20.5 104.0 1.7272 6.5 4.1 4U 1700-377 256.4292 -36.4896 9.5 20.4 100.1 0.3354 1.2 4.0 GX 349+2 263.1700 -24.7930 4.1 26.3 70.3 0.8600 2.8 9.2 GX 1+4 264.9509 -44.4097 11.7 29.1 112.9 -0.3555 -1.0 9.2 4U 1735-44 268.2412 -1.5405 8.3 42.5 38.5 0.7656 1.4 9.3 SW J1753.5-0127 270.2374 -25.0486 6.6 32.5 74.2 0.7019 1.8 3.1 GX 5-1 270.1695 -25.8361 41.0 32.2 75.6 0.1111 0.3 9.1 GRS 1758-258 274.0293 -14.0609 4.8 39.9 59.1 1.6167 2.4 2.0 GX 17+2 275.9063 -30.4888 18.9 36.3 85.4 0.3838 0.6 7.4 H1820-303 263.1664 -33.7855 8.6 25.4 90.9 -0.4029 -1.3 9.3 GX 354-0 264.4516 16.8604 2.8 54.3 18.8 5.0232 4.2 ------ UNKNOWN 264.4196 16.6141 2.4 54.1 18.9 5.9731 4.9 ------ UNKNOWN 235.2937 21.9655 2.4 50.8 -16.3 2.3622 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -13.392000 34.608000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.1098 -60.7937 324.4 52.5 -164.4 0.0073 0.0 11.9 Cen X-3 186.4422 -62.7259 3.7 45.6 -169.8 -0.4400 -3.2 6.5 GX 301-2 244.8387 -15.5845 5.0 16.6 21.7 0.1764 2.3 8.8 Sco X-1 255.8121 -37.8495 5.1 20.3 104.2 0.2157 2.3 8.3 4U 1700-377 256.4479 -36.5574 6.2 20.4 100.3 0.1791 1.9 8.1 GX 349+2 262.8526 -24.6141 77.0 26.1 69.7 -0.0167 -0.2 11.6 GX 1+4 264.6827 -44.4152 7.1 29.0 113.1 -0.2005 -1.6 3.3 4U 1735-44 268.3645 -1.3096 5.5 42.8 38.4 0.4238 2.1 8.6 SW J1753.5-0127 270.3353 -25.1172 7.7 32.5 74.3 0.2405 1.5 3.6 GX 5-1 270.2417 -25.6845 15.8 32.3 75.3 -0.1200 -0.7 4.8 GRS 1758-258 273.8939 -13.9082 3.8 39.8 58.8 -0.7300 -3.1 10.1 GX 17+2 276.0474 -30.2620 4.2 36.5 85.0 -0.6370 -2.8 8.9 H1820-303 262.9924 -33.7739 10.7 25.3 90.9 0.1246 1.1 3.6 GX 354-0 216.5358 5.8525 1.1 38.5 -46.5 1.3111 10.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 106.908590 362.738000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9932 -15.6524 2.0 35.4 111.9 14.8073 5.7 1.1 Sco X-1 254.4664 35.3335 29.5 45.7 28.8 1.0722 0.4 0.7 Her X-1 247.3798 55.2397 2.2 55.2 5.1 24.6099 5.2 ------ UNKNOWN 227.2499 49.7405 2.9 44.9 -5.9 6.9688 4.0 ------ UNKNOWN 218.9175 51.1876 2.9 45.4 -13.6 8.1123 3.9 ------ UNKNOWN 190.2927 30.3502 3.4 34.8 -57.7 5.8592 3.4 ------ UNKNOWN