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 00:06:42 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger535764
======================================================================
Trigger: 00535764 Segment: 000
BAT Trigger Time: 371646940.16 [s; MET]
Trigger Stop: 371646942.208 [s; MET]
UTC: 2012-10-11T11:15:30.412760 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 260.200124470458 Dec: 41.1367639177282 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.18
Image Trigger?: NO
Rate S/N Ratio: 13.1529464379659 [ if not an image trigger ]
Image S/N Ratio: 7.18
Analysis Position: [ source = BAT ]
RA: 260.200124470458 Dec: 41.1367639177282 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 260.20149705325 Dec: 41.1194181307145 [deg; J2000]
{ 17h 20m 48.4s , +41d 07' 09.9" }
+/- 1.68117707499907 [arcmin] (estimated 90% radius based on SNR)
+/- 0.645975513822436 [arcmin] (formal 1-sigma fit error)
SNR: 14.4814963205219
Angular difference between the analysis and refined position is 1.042594 arcmin
Partial Coding Fraction: 0.328125 [ including projection effects ]
Duration
T90: 97.2359999418259 +/- 17.167971075262
Measured from: -4.57200002670288
to: 92.663999915123 [s; relative to TRIGTIME]
T50: 43.62399995327 +/- 11.6050643951934
Measured from: 1.51999998092651
to: 45.1439999341965 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.648000001907349
to: 0.351999998092651 [s; relative to TRIGTIME]
Total Fluence
Measured from: -7.45200002193451
to: 109.583999991417 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.493255 1.165624 1.134015 0.283820
0.094215 0.093289 0.081661 0.069730 [error]
Peak 0.027368 0.037415 0.061419 0.031757
0.012171 0.012252 0.011443 0.009540 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 117.036 -7.452 109.584
T90 97.236 -4.572 92.664
T50 43.624 1.520 45.144
Peak 1.000 -0.648 0.352
====== 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 -1.202 -0.140 0.143 - - - 1.97e-03 -1.65e-04 1.65e-04 43.600 57
CPL -0.418 -0.607 0.707 116.193 -30.104 181.292 4.36e-03 -1.97e-03 4.28e-03 38.570 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 -0.885 -0.437 0.500 - - - 1.01e-02 -2.94e-03 2.76e-03 58.370 57
CPL -0.559 0.559 2.378 298.115 -298.115 -298.115 1.33e-02 N/A N/A 58.390 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 2.22e-07 4.91e-07 8.53e-07 3.45e-06 2.33e-06 5.02e-06 erg/cm2
90%_error_low -3.64e-08 -5.04e-08 -7.70e-08 -6.48e-07 -1.99e-07 -6.93e-07 erg/cm2
90%_error_hi 3.86e-08 4.99e-08 7.66e-08 7.47e-07 1.99e-07 7.72e-07 erg/cm2
Peak flux PL 2.31e-01 3.37e-01 3.65e-01 7.38e-01 1.16e+00 1.67e+00 ph/cm2/s
90%_error_low -1.23e-01 -1.28e-01 -8.69e-02 -3.22e-01 -3.19e-01 -4.06e-01 ph/cm2/s
90%_error_hi 1.62e-01 1.28e-01 8.68e-02 4.62e-01 3.28e-01 4.21e-01 ph/cm2/s
Fluence CPL 1.82e-07 5.13e-07 9.24e-07 1.47e-06 2.26e-06 3.09e-06 erg/cm2
90%_error_low -4.52e-08 -5.64e-08 -9.48e-08 -6.36e-07 -2.12e-07 -6.56e-07 erg/cm2
90%_error_hi 4.81e-08 5.71e-08 9.69e-08 1.31e-06 2.11e-07 1.29e-06 erg/cm2
Peak flux CPL 2.20e-01 3.35e-01 3.71e-01 6.68e-01 1.15e+00 1.59e+00 ph/cm2/s
90%_error_low -1.68e-01 -1.44e-01 -9.28e-02 -6.68e-01 -3.36e-01 -6.56e-01 ph/cm2/s
90%_error_hi 1.70e-01 1.30e-01 1.21e-01 3.11e-01 3.00e-01 4.84e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 260.2015 41.1194 0.0133 47.5809 -17.9568 2.0134797 14.481 TRIG_00535764 Foreground time interval of the image: -7.452 23.541 (delta_t = 30.993 [sec]) Background time interval of the image: -239.160 -7.452 (delta_t = 231.708 [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 -7.452 sec. to 109.584 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.20158 ( -0.139759 0.143009 ) Norm@50keV : 1.96644E-03 ( -0.000165023 0.000164539 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.60 using 59 PHA bins. # Reduced chi-squared = 0.7650 for 57 degrees of freedom # Null hypothesis probability = 9.040856e-01 Photon flux (15-150 keV) in 117 sec: 0.230871 ( -0.020681 0.020803 ) ph/cm2/s Energy fluence (15-150 keV) : 2.33338e-06 ( -1.98584e-07 1.99334e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -7.452 sec. to 109.584 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.417727 ( -0.606873 0.707269 ) Epeak [keV] : 116.193 ( -30.1041 181.291 ) Norm@50keV : 4.36013E-03 ( -0.00197029 0.00427542 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 38.57 using 59 PHA bins. # Reduced chi-squared = 0.6888 for 56 degrees of freedom # Null hypothesis probability = 9.634722e-01 Photon flux (15-150 keV) in 117 sec: 0.222190 ( -0.021654 0.021785 ) ph/cm2/s Energy fluence (15-150 keV) : 2.25666e-06 ( -2.12213e-07 2.10774e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.648 sec. to 0.352 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.884737 ( -0.43719 0.499847 ) Norm@50keV : 1.01068E-02 ( -0.00294267 0.00275875 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 58.37 using 59 PHA bins. # Reduced chi-squared = 1.024 for 57 degrees of freedom # Null hypothesis probability = 4.246654e-01 Photon flux (15-150 keV) in 1 sec: 1.15994 ( -0.31899 0.32833 ) ph/cm2/s Energy fluence (15-150 keV) : 1.14117e-07 ( -2.73669e-08 2.73353e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.648 sec. to 0.352 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.877088 ( 0.575055 2.39363 ) Epeak [keV] : 9969.71 ( -9964.61 -9964.61 ) Norm@50keV : 1.01735E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 58.37 using 59 PHA bins. # Reduced chi-squared = 1.042 for 56 degrees of freedom # Null hypothesis probability = 3.882688e-01 Photon flux (15-150 keV) in 1 sec: 1.15168 ( -0.33566 0.3005 ) ph/cm2/s Energy fluence (15-150 keV) : 1.14014e-07 ( -2.75411e-08 2.73992e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 97.236 sec. Hardness ratio (energy fluence ratio) = 1.73920156848
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 7.128471e-07 S(50-150 keV) = 1.6205621e-06
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 = 1.041096568593759E+00, IMY = 3.374044933331037E-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: -239.160000 -7.452000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4426 35.3475 4.2 46.6 -27.9 1.1175 2.8 0.8 Her X-1 256.1895 -38.0094 0.0 48.4 -136.2 -0.7827 -1.2 13.8 4U 1700-377 256.2966 -36.5243 4.0 47.3 -134.8 -1.7531 -2.9 9.0 GX 349+2 262.8964 -24.8780 85.9 35.1 -128.1 0.0407 0.1 10.0 GX 1+4 264.7490 -44.4102 14.5 49.5 -148.1 0.4162 0.8 2.4 4U 1735-44 268.5162 -1.5693 6.5 19.4 -86.2 0.3882 1.8 11.3 SW J1753.5-0127 270.2720 -25.0534 2.4 30.8 -137.5 1.1502 4.7 1.7 GX 5-1 270.4395 -25.6521 8.1 31.2 -138.4 0.3486 1.4 9.2 GRS 1758-258 273.9675 -13.8955 3.5 20.0 -126.9 0.6768 3.3 8.7 GX 17+2 275.9067 -30.3933 3.6 33.0 -150.7 0.7305 3.2 1.8 H1820-303 285.2174 -25.0474 0.0 25.8 -164.3 0.2674 1.3 12.5 HT1900.1-2455 288.8167 10.9058 1.7 10.3 15.8 1.2998 6.6 2.6 GRS 1915+105 299.5680 35.2171 2.2 36.3 26.6 1.4991 5.2 1.4 Cyg X-1 308.1490 40.9120 3.2 44.3 32.4 1.9004 3.5 3.0 Cyg X-3 262.7940 -33.6846 0.0 41.6 -137.7 -0.0645 -0.2 13.3 GX 354-0 290.9035 -16.2414 2.7 17.1 -179.8 0.7343 4.3 ------ UNKNOWN 288.9033 -20.6230 2.4 21.3 -172.5 0.9612 4.8 ------ UNKNOWN 255.2755 47.7297 2.8 54.9 -16.0 2.5000 4.2 ------ UNKNOWN 266.2968 -26.4149 0.9 34.1 -133.8 3.4994 13.3 ------ UNKNOWN 250.1514 12.5874 2.5 39.2 -60.4 1.9235 4.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -7.452000 23.540610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3528 35.4563 5.2 46.7 -27.8 0.3122 2.2 8.5 Her X-1 256.1763 -37.9546 6.5 48.3 -136.1 0.3944 1.8 11.2 4U 1700-377 256.3047 -36.4635 6.6 47.2 -134.8 0.3640 1.8 6.8 GX 349+2 262.8541 -24.7566 6.9 35.0 -127.9 -0.1734 -1.7 8.5 GX 1+4 264.9241 -44.5026 12.4 49.5 -148.3 -0.1580 -0.9 8.4 4U 1735-44 268.2091 -1.4144 8.2 19.7 -85.6 0.1115 1.4 9.8 SW J1753.5-0127 270.4098 -24.9338 0.0 30.6 -137.5 0.1046 1.2 11.1 GX 5-1 270.1650 -25.8319 4.9 31.5 -138.2 0.1988 2.4 9.1 GRS 1758-258 273.8821 -14.1962 0.0 20.2 -127.3 0.0830 1.1 12.0 GX 17+2 275.8475 -30.5153 8.7 33.1 -150.7 -0.1016 -1.3 9.8 H1820-303 284.8664 -24.8333 20.5 25.6 -163.5 0.0404 0.6 10.6 HT1900.1-2455 288.9352 11.0319 23.9 10.5 16.3 0.0309 0.5 9.6 GRS 1915+105 299.4072 35.2969 412.2 36.3 26.3 -0.0028 -0.0 10.6 Cyg X-1 307.9355 40.9934 17.5 44.3 32.1 0.1060 0.7 8.3 Cyg X-3 262.9778 -33.9689 5.9 41.7 -138.1 -0.2365 -1.9 8.1 GX 354-0 310.0829 -36.3691 2.3 42.4 163.4 0.6193 5.0 ------ UNKNOWN 286.2780 48.7236 2.4 48.1 8.9 0.7402 4.9 ------ UNKNOWN 296.1443 -45.1433 2.7 46.4 -177.8 0.5403 4.3 ------ UNKNOWN 291.8977 -46.5623 2.6 47.3 -173.5 0.5460 4.5 ------ UNKNOWN 260.2015 41.1194 0.8 47.6 -18.0 2.0135 14.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 86.740610 272.740600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5215 35.2382 3.5 7.4 -117.2 0.4979 3.2 7.0 Her X-1 268.2318 -1.4256 3.4 43.2 -167.8 0.9374 3.4 8.3 SW J1753.5-0127 274.0537 -14.0283 10.5 56.6 -172.2 0.7834 1.1 2.8 GX 17+2 288.9193 10.9937 4.6 39.3 155.9 0.8128 2.5 7.7 GRS 1915+105 299.4947 35.1750 2.5 31.2 112.0 1.3477 4.6 5.0 Cyg X-1 308.1674 40.9325 3.4 35.7 98.0 1.2638 3.4 2.9 Cyg X-3 235.6772 37.4493 2.8 19.3 -69.0 0.6851 4.0 ------ UNKNOWN 252.3201 3.0406 2.5 38.8 -143.4 1.0760 4.7 ------ UNKNOWN 204.9816 41.7924 2.4 40.6 -46.1 1.3407 4.7 ------ UNKNOWN 171.4117 50.1970 3.3 59.0 -24.3 4.4411 3.6 ------ UNKNOWN 172.6393 49.1692 2.8 58.7 -25.8 5.1053 4.1 ------ UNKNOWN 250.9705 -13.4343 4.5 55.2 -145.1 2.7648 2.6 ------ UNKNOWN