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 00:18:17 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger535026
======================================================================
Trigger: 00535026 Segment: 000
BAT Trigger Time: 370808592 [s; MET]
Trigger Stop: 370808656 [s; MET]
UTC: 2012-10-01T18:23:02.288260 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 276.032542704368 Dec: -5.66707146788107 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.79
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.79
Analysis Position: [ source = BAT ]
RA: 276.032542704368 Dec: -5.66707146788107 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 276.032652738635 Dec: -5.66746101233414 [deg; J2000]
{ 18h 24m 07.8s , -05d 40' 02.9" }
+/- 1.51295989025431 [arcmin] (estimated 90% radius based on SNR)
+/- 0.685078133259708 [arcmin] (formal 1-sigma fit error)
SNR: 16.8353470408549
Angular difference between the analysis and refined position is 0.024278 arcmin
Partial Coding Fraction: 1 [ including projection effects ]
Duration
T90: 147.823999941349 +/- 18.6049249307883
Measured from: -22.7879999876022
to: 125.035999953747 [s; relative to TRIGTIME]
T50: 61.7359999418259 +/- 24.4651086343509
Measured from: -6.38800001144409
to: 55.3479999303818 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.27200001478195
to: 4.27200001478195 [s; relative to TRIGTIME]
Total Fluence
Measured from: -27.727999985218
to: 142.967999994755 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.764618 0.981461 0.785278 0.204625
0.084112 0.075263 0.062830 0.053878 [error]
Peak 0.016752 0.022189 0.014835 0.003988
0.007066 0.005901 0.004852 0.004226 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 170.696 -27.728 142.968
T90 147.824 -22.788 125.036
T50 61.736 -6.388 55.348
Peak 1.000 3.272 4.272
====== 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: 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 -1.351 -0.147 0.149 - - - 1.03e-03 -8.19e-05 8.18e-05 90.120 57
CPL -1.285 -0.202 0.587 546.780 -546.780 -546.780 1.10e-03 -1.51e-04 9.66e-04 90.090 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 -1.711 -0.575 0.542 - - - 3.47e-03 -1.14e-03 1.10e-03 47.010 57
CPL -1.205 -1.058 2.732 74.304 -74.304 -74.304 6.40e-03 -6.40e-03 1.77e-01 46.800 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 1.95e-07 3.92e-07 6.15e-07 2.13e-06 1.71e-06 3.33e-06 erg/cm2
90%_error_low -2.96e-08 -3.58e-08 -6.10e-08 -4.42e-07 -1.49e-07 -4.84e-07 erg/cm2
90%_error_hi 3.10e-08 3.54e-08 6.06e-08 5.22e-07 1.51e-07 5.50e-07 erg/cm2
Peak flux PL 1.75e-01 1.55e-01 9.49e-02 8.78e-02 4.62e-01 5.13e-01 ph/cm2/s
90%_error_low -7.93e-02 -4.80e-02 -3.92e-02 -5.55e-02 -1.40e-01 -1.52e-01 ph/cm2/s
90%_error_hi 9.03e-02 4.73e-02 3.93e-02 9.62e-02 1.41e-01 1.53e-01 ph/cm2/s
Fluence CPL 1.92e-07 3.94e-07 6.18e-07 1.93e-06 1.70e-06 3.13e-06 erg/cm2
90%_error_low -3.61e-08 -3.73e-08 -5.51e-08 -1.06e-06 -1.67e-07 -1.07e-06 erg/cm2
90%_error_hi 2.85e-08 4.04e-08 6.64e-08 3.19e-07 1.57e-07 3.60e-07 erg/cm2
Peak flux CPL 1.61e-01 1.63e-01 9.73e-02 4.87e-02 4.51e-01 4.70e-01 ph/cm2/s
90%_error_low -9.38e-02 -5.54e-02 N/A -4.87e-02 -1.46e-01 N/A ph/cm2/s
90%_error_hi 1.01e-01 5.93e-02 N/A 6.06e-02 1.46e-01 N/A ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 276.0327 -5.6675 0.0114 12.3053 20.1469 2.1445387 16.835 TRIG_00535026 Foreground time interval of the image: -27.728 74.501 (delta_t = 102.229 [sec]) Background time interval of the image: -239.000 -27.728 (delta_t = 211.272 [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 -27.728 sec. to 142.968 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.35063 ( -0.147229 0.148763 ) Norm@50keV : 1.02672E-03 ( -8.18552e-05 8.18247e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 90.12 using 59 PHA bins. # Reduced chi-squared = 1.581 for 57 degrees of freedom # Null hypothesis probability = 3.388242e-03 Photon flux (15-150 keV) in 170.7 sec: 0.123707 ( -0.010368 0.010418 ) ph/cm2/s Energy fluence (15-150 keV) : 1.71168e-06 ( -1.4938e-07 1.50596e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -27.728 sec. to 142.968 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.28508 ( -0.200598 0.588385 ) Epeak [keV] : 546.780 ( -592.481 -592.481 ) Norm@50keV : 1.10424E-03 ( -0.00014826 0.00096916 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 90.09 using 59 PHA bins. # Reduced chi-squared = 1.609 for 56 degrees of freedom # Null hypothesis probability = 2.614844e-03 Photon flux (15-150 keV) in 170.7 sec: 0.123264 ( -0.011028 0.010711 ) ph/cm2/s Energy fluence (15-150 keV) : 1.70315e-06 ( -1.67286e-07 1.56893e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 3.272 sec. to 4.272 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.71097 ( -0.574582 0.542116 ) Norm@50keV : 3.46663E-03 ( -0.00114268 0.0011 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.01 using 59 PHA bins. # Reduced chi-squared = 0.8247 for 57 degrees of freedom # Null hypothesis probability = 8.246578e-01 Photon flux (15-150 keV) in 1 sec: 0.462206 ( -0.139751 0.140755 ) ph/cm2/s Energy fluence (15-150 keV) : 3.20745e-08 ( -1.06081e-08 1.10397e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.272 sec. to 4.272 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.20515 ( -1.05832 2.73204 ) Epeak [keV] : 74.3043 ( -74.3089 -74.3089 ) Norm@50keV : 6.39770E-03 ( -0.00639719 0.177307 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 46.80 using 59 PHA bins. # Reduced chi-squared = 0.8357 for 56 degrees of freedom # Null hypothesis probability = 8.045972e-01 Photon flux (15-150 keV) in 1 sec: 0.450834 ( -0.145914 0.146335 ) ph/cm2/s Energy fluence (15-150 keV) : 3.07015e-08 ( -1.12524e-08 1.16852e-08 ) 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 = 2.047849142613579E-01, IMY = -7.513075084194860E-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: -239.000000 -27.728000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9848 -15.6401 0.2 28.1 -77.8 14.3572 46.4 0.3 Sco X-1 254.3488 35.3609 9.2 56.5 -7.4 1.1874 1.3 5.4 Her X-1 255.9327 -37.7232 4.0 25.6 -132.6 0.6991 2.9 7.7 4U 1700-377 256.4825 -36.5650 2.8 24.4 -131.4 0.9814 4.1 8.8 GX 349+2 263.0305 -24.7297 23.4 12.6 -113.0 -0.1185 -0.5 1.5 GX 1+4 264.6690 -44.5771 16.4 27.9 -153.1 0.1723 0.7 8.3 4U 1735-44 268.4906 -1.3300 3.4 17.5 -7.6 0.6828 3.4 10.4 SW J1753.5-0127 270.2284 -25.0146 2.3 8.1 -140.6 1.0363 5.1 4.9 GX 5-1 270.3556 -25.6826 6.6 8.6 -143.4 0.3678 1.8 4.6 GRS 1758-258 274.0632 -14.0969 1.7 3.8 8.4 1.4732 6.8 4.9 GX 17+2 276.0276 -30.1934 4.3 12.4 -174.8 0.5679 2.7 11.7 H1820-303 285.1489 -24.7347 0.0 12.2 138.3 -0.2982 -1.3 12.7 HT1900.1-2455 288.8620 10.9128 3.1 32.2 39.7 1.2206 3.7 4.2 GRS 1915+105 262.9891 -33.8347 71.8 18.9 -137.7 -0.0371 -0.2 0.0 GX 354-0 311.9258 -43.3143 2.8 40.6 149.1 1.7906 4.2 ------ UNKNOWN 266.3075 -26.3993 0.6 11.3 -128.4 4.1098 19.3 ------ UNKNOWN 257.9996 -41.5350 2.4 27.5 -140.8 1.1933 4.9 ------ UNKNOWN 240.7500 25.1020 2.2 54.0 -26.1 3.8604 5.3 ------ UNKNOWN 237.8392 -24.5752 2.7 34.6 -95.5 1.8577 4.3 ------ UNKNOWN 232.7300 10.6781 2.2 50.0 -46.3 5.4235 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -27.728000 74.500590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9474 -15.5573 5.5 28.2 -77.6 -0.4228 -2.1 5.3 Sco X-1 254.5095 35.2169 216.3 56.3 -7.3 0.0291 0.1 7.9 Her X-1 255.8831 -37.9869 7.3 25.8 -132.9 0.2655 1.6 9.9 4U 1700-377 256.5510 -36.5639 5.6 24.4 -131.5 -0.3370 -2.0 10.1 GX 349+2 263.1961 -24.8707 7.8 12.5 -113.9 0.1960 1.5 12.7 GX 1+4 264.5771 -44.5657 7.0 27.9 -153.0 -0.2537 -1.6 9.9 4U 1735-44 268.4633 -1.2804 5.5 17.5 -7.7 -0.2698 -2.1 11.8 SW J1753.5-0127 270.0912 -24.9591 0.0 8.1 -139.7 0.2806 2.2 12.7 GX 5-1 270.4119 -25.8770 7.0 8.8 -144.3 0.2185 1.7 10.0 GRS 1758-258 273.9557 -13.8934 8.4 4.0 7.1 0.1729 1.4 9.1 GX 17+2 276.0516 -30.1887 0.0 12.4 -174.9 -0.1826 -1.4 12.5 H1820-303 285.1811 -24.8407 5.5 12.3 138.6 0.2897 2.1 9.2 HT1900.1-2455 288.7030 10.7890 0.0 32.0 39.6 0.2913 1.4 10.9 GRS 1915+105 262.9977 -33.6869 6.9 18.8 -137.4 0.2338 1.7 8.9 GX 354-0 276.0326 -5.6675 0.7 12.3 20.1 2.1447 16.8 ------ UNKNOWN 257.4081 31.3336 2.1 51.8 -6.3 1.8016 5.4 ------ UNKNOWN 260.9506 -65.0455 2.3 48.0 -160.4 1.3800 5.1 ------ UNKNOWN 242.4937 -25.2199 2.4 30.4 -97.5 1.0620 4.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 110.300580 963.014400 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9821 -15.6376 0.3 32.1 -107.1 53.3118 46.0 0.2 Sco X-1 254.5883 35.5218 5.6 45.8 -21.0 -2.8320 -2.1 12.5 Her X-1 255.9040 -37.8352 2.3 37.0 -149.6 4.1299 5.0 3.9 4U 1700-377 256.5129 -36.5156 3.5 35.7 -149.0 2.5839 3.3 6.7 GX 349+2 262.9655 -24.7785 5.0 22.9 -144.6 1.6424 2.3 3.1 GX 1+4 264.8723 -44.3759 30.4 39.9 -164.0 0.3265 0.4 7.1 4U 1735-44 268.3239 -1.4594 4.0 8.8 -58.1 1.6477 2.9 2.7 SW J1753.5-0127 270.3060 -25.0576 2.0 20.2 -161.3 3.6318 5.7 1.8 GX 5-1 270.2449 -25.6898 3.1 20.8 -161.6 2.3880 3.8 4.5 GRS 1758-258 273.9866 -14.0712 1.5 8.6 -163.2 4.8873 7.9 2.4 GX 17+2 276.0200 -30.2914 4.1 24.6 -176.4 1.9893 2.8 6.7 H1820-303 284.8769 -24.8872 47.2 21.0 160.6 -0.1826 -0.2 8.9 HT1900.1-2455 288.8308 10.8912 1.7 20.9 41.1 4.8371 6.7 3.8 GRS 1915+105 299.4305 35.3052 43.9 46.5 30.1 -0.5154 -0.3 10.0 Cyg X-1 263.0652 -33.9862 16.5 30.8 -155.1 0.4825 0.7 9.9 GX 354-0 290.7098 33.1168 3.7 41.2 22.3 3.4756 3.1 ------ UNKNOWN 288.7455 40.9086 3.7 48.0 16.5 4.7167 3.1 ------ UNKNOWN 266.2903 -26.4080 0.5 22.7 -153.4 16.0981 22.6 ------ UNKNOWN 266.5957 -32.2195 1.4 28.0 -159.3 5.6586 8.2 ------ UNKNOWN 239.9101 -52.4275 2.8 55.4 -150.6 11.2572 4.1 ------ UNKNOWN 235.2715 15.9230 2.5 45.8 -57.7 11.9831 4.5 ------ UNKNOWN