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 03:04:29 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger528443
======================================================================
Trigger: 00528443 Segment: 000
BAT Trigger Time: 364804752.32 [s; MET]
Trigger Stop: 364804756.416 [s; MET]
UTC: 2012-07-24T06:39:02.860140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 245.189825352394 Dec: 3.50921659187649 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.9
Image Trigger?: NO
Rate S/N Ratio: 6.32455532033676 [ if not an image trigger ]
Image S/N Ratio: 7.9
Analysis Position: [ source = BAT ]
RA: 245.189825352394 Dec: 3.50921659187649 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 245.194069464937 Dec: 3.53826662505599 [deg; J2000]
{ 16h 20m 46.6s , +03d 32' 17.8" }
+/- 2.13969695867765 [arcmin] (estimated 90% radius based on SNR)
+/- 0.845190932888636 [arcmin] (formal 1-sigma fit error)
SNR: 10.2609262603807
Angular difference between the analysis and refined position is 1.761436 arcmin
Partial Coding Fraction: 0.5 [ including projection effects ]
Duration
T90: 77.9239999651909 +/- 18.6239936005719
Measured from: -16.7120000123978
to: 61.2119999527931 [s; relative to TRIGTIME]
T50: 36.2119999527931 +/- 18.1669220249669
Measured from: -4.49199998378754
to: 31.7199999690056 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.56000000238419
to: 8.56000000238419 [s; relative to TRIGTIME]
Total Fluence
Measured from: -20.0519999861717
to: 78.5799999833107 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.750989 0.632945 0.188518 -0.011579
0.078715 0.071482 0.059929 0.051698 [error]
Peak 0.020362 0.041183 0.014183 -0.005473
0.008839 0.008067 0.006294 0.005557 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 98.632 -20.052 78.580
T90 77.924 -16.712 61.212
T50 36.212 -4.492 31.720
Peak 1.000 7.560 8.560
====== 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 -2.431 -0.270 0.248 - - - 8.26e-04 -1.61e-04 1.60e-04 52.120 57
CPL -0.747 -1.056 1.686 26.728 -25.503 7.498 9.46e-03 -9.46e-03 1.09e-01 46.250 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 -2.019 -0.494 0.451 - - - 4.75e-03 -1.59e-03 1.55e-03 43.950 57
CPL 1.210 -2.541 4.910 39.290 -10.280 13.369 3.82e-01 -3.82e-01 3.90e+02 38.950 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 2.51e-07 2.64e-07 1.96e-07 2.34e-07 8.00e-07 9.45e-07 erg/cm2
90%_error_low -4.10e-08 -3.71e-08 -4.96e-08 -9.63e-08 -1.22e-07 -1.76e-07 erg/cm2
90%_error_hi 4.18e-08 3.67e-08 5.31e-08 1.35e-07 1.25e-07 2.03e-07 erg/cm2
Peak flux PL 3.23e-01 2.39e-01 1.18e-01 8.26e-02 7.19e-01 7.63e-01 ph/cm2/s
90%_error_low -1.24e-01 -6.94e-02 -4.75e-02 -4.58e-02 -2.11e-01 -2.21e-01 ph/cm2/s
90%_error_hi 1.35e-01 6.93e-02 4.98e-02 7.94e-02 2.12e-01 2.21e-01 ph/cm2/s
Fluence CPL 2.50e-07 2.66e-07 1.96e-07 2.57e-07 8.01e-07 9.30e-07 erg/cm2
90%_error_low -3.95e-08 -4.18e-08 -5.07e-08 -1.20e-07 -1.22e-07 -1.63e-07 erg/cm2
90%_error_hi 4.33e-08 3.61e-08 5.38e-08 1.53e-07 1.25e-07 2.29e-07 erg/cm2
Peak flux CPL 2.38e-01 3.31e-01 9.72e-02 2.93e-03 6.69e-01 6.70e-01 ph/cm2/s
90%_error_low -1.36e-01 -1.00e-01 -6.47e-02 -2.93e-03 -2.05e-01 -2.05e-01 ph/cm2/s
90%_error_hi 1.53e-01 1.06e-01 6.82e-02 3.65e-02 2.11e-01 2.11e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 245.1941 3.5383 0.0187 37.4716 -36.5709 1.2662129 10.261 TRIG_00528443 Foreground time interval of the image: -20.052 35.781 (delta_t = 55.833 [sec]) Background time interval of the image: -239.320 -20.052 (delta_t = 219.268 [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 -20.052 sec. to 78.580 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.43087 ( -0.27029 0.24791 ) Norm@50keV : 8.25811E-04 ( -0.000161259 0.00015979 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.12 using 59 PHA bins. # Reduced chi-squared = 0.9144 for 57 degrees of freedom # Null hypothesis probability = 6.583683e-01 Photon flux (15-150 keV) in 98.63 sec: 0.155622 ( -0.020273 0.020279 ) ph/cm2/s Energy fluence (15-150 keV) : 8.00441e-07 ( -1.21676e-07 1.253e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -20.052 sec. to 78.580 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.746979 ( -1.05641 1.68606 ) Epeak [keV] : 26.7277 ( -25.5029 7.49827 ) Norm@50keV : 9.45753E-03 ( -0.0094571 0.10851 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 46.25 using 59 PHA bins. # Reduced chi-squared = 0.8259 for 56 degrees of freedom # Null hypothesis probability = 8.204758e-01 Photon flux (15-150 keV) in 98.63 sec: 0.149283 ( -0.02046 0.02056 ) ph/cm2/s Energy fluence (15-150 keV) : 8.01049e-07 ( -1.22097e-07 1.24733e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 7.560 sec. to 8.560 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.01899 ( -0.490746 0.454128 ) Norm@50keV : 4.74929E-03 ( -0.0015872 0.00155544 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.95 using 59 PHA bins. # Reduced chi-squared = 0.7711 for 57 degrees of freedom # Null hypothesis probability = 8.972684e-01 Photon flux (15-150 keV) in 1 sec: 0.718938 ( -0.210743 0.21189 ) ph/cm2/s Energy fluence (15-150 keV) : 4.38238e-08 ( -1.36764e-08 1.41297e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.560 sec. to 8.560 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 1.21023 ( -2.57536 4.87605 ) Epeak [keV] : 39.2902 ( -10.2389 13.4102 ) Norm@50keV : 0.382268 ( -0.480657 390.38 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 38.95 using 59 PHA bins. # Reduced chi-squared = 0.6955 for 56 degrees of freedom # Null hypothesis probability = 9.596706e-01 Photon flux (15-150 keV) in 1 sec: 0.669435 ( -0.204539 0.210874 ) ph/cm2/s Energy fluence (15-150 keV) : 3.65469e-08 ( -1.10786e-08 1.3013e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 77.924 sec. Hardness ratio (energy fluence ratio) = 0.741856781036
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 5.148976e-07 S(50-150 keV) = 2.8555938e-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 = 6.156228488082388E-01, IMY = 4.567163788541667E-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: -239.320000 -20.052000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9660 -15.6378 0.4 24.5 -64.7 6.7828 31.0 0.8 Sco X-1 255.9892 -37.8593 1.5 15.7 -136.3 1.3008 7.9 0.9 4U 1700-377 256.4318 -36.3586 3.4 14.4 -133.0 0.5671 3.3 3.9 GX 349+2 262.9629 -24.7535 4.1 5.3 -70.0 0.4997 2.8 2.6 GX 1+4 264.9389 -44.3839 5.9 18.3 -167.6 0.3373 2.0 9.3 4U 1735-44 268.3019 -1.4217 4.2 24.9 3.4 0.5185 2.8 4.4 SW J1753.5-0127 270.1093 -24.9446 133.3 1.9 49.2 0.0148 0.1 12.5 GX 5-1 270.1504 -25.9050 0.0 1.5 77.9 -0.1776 -1.0 12.7 GRS 1758-258 274.0485 -14.1079 2.9 13.2 27.8 0.7219 4.0 5.0 GX 17+2 275.9152 -30.2659 6.6 7.6 127.3 0.2994 1.7 6.1 H1820-303 285.2081 -25.0369 42.8 15.0 92.9 -0.0478 -0.3 11.7 HT1900.1-2455 288.7795 10.9451 1.7 42.1 34.4 2.6972 6.8 1.1 GRS 1915+105 263.0780 -33.8371 4.7 8.9 -144.8 0.4377 2.5 4.4 GX 354-0 298.4104 9.2218 2.9 45.8 47.3 2.9596 4.0 ------ UNKNOWN 291.0058 19.6462 3.1 50.9 31.7 3.8516 3.8 ------ UNKNOWN 265.7048 -28.4091 2.8 3.3 -125.7 0.6758 4.1 ------ UNKNOWN 260.3105 26.3055 2.6 53.2 -5.2 2.1859 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -20.052000 35.780600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8327 -15.5767 3.7 24.6 -64.8 -0.3239 -3.1 9.3 Sco X-1 255.9956 -37.8434 3.5 15.7 -136.3 0.2599 3.3 0.4 4U 1700-377 256.6152 -36.5646 18.1 14.4 -134.0 0.0488 0.6 12.1 GX 349+2 262.8396 -24.6007 0.0 5.5 -68.9 -0.1235 -1.6 12.7 GX 1+4 264.5862 -44.5646 10.2 18.5 -166.9 0.0872 1.1 9.6 4U 1735-44 268.4923 -1.2943 0.0 25.0 3.8 -0.1523 -1.7 12.1 SW J1753.5-0127 270.3975 -24.9201 12.1 2.1 53.7 -0.0728 -1.0 11.4 GX 5-1 270.2249 -25.7696 7.3 1.6 73.8 0.1239 1.6 4.5 GRS 1758-258 273.8741 -14.1981 5.2 13.1 27.3 0.1742 2.2 12.4 GX 17+2 275.7315 -30.2392 0.0 7.4 127.7 0.0231 0.3 12.6 H1820-303 284.9231 -25.0149 6.5 14.8 92.6 -0.1550 -1.8 8.4 HT1900.1-2455 288.9694 10.8054 0.0 42.1 34.8 -0.0208 -0.1 13.1 GRS 1915+105 263.0177 -33.7638 10.2 8.9 -144.3 0.0873 1.1 4.5 GX 354-0 271.0477 -50.2120 2.4 24.0 -179.8 0.3820 4.9 ------ UNKNOWN 264.1968 19.5757 2.3 46.1 -1.7 0.7610 5.0 ------ UNKNOWN 258.0443 -53.1768 2.2 28.0 -162.4 0.4386 5.4 ------ UNKNOWN 245.1941 3.5383 1.1 37.5 -36.6 1.2663 10.3 ------ UNKNOWN 242.8152 0.9756 1.8 36.9 -42.3 0.7824 6.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 97.780590 962.728400 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9852 -15.6416 0.2 19.2 156.4 31.8344 62.1 0.3 Sco X-1 254.5075 35.1567 0.0 32.8 -10.2 -0.1806 -0.3 11.4 Her X-1 255.9883 -37.8285 2.2 42.5 143.1 8.8252 5.1 0.9 4U 1700-377 256.3629 -36.5279 9.8 41.4 142.1 1.9383 1.2 7.2 GX 349+2 263.1001 -24.9026 13.4 33.3 125.2 -0.8674 -0.9 10.6 GX 1+4 268.4212 -1.5009 3.7 23.7 77.5 1.9064 3.1 4.3 SW J1753.5-0127 270.0849 -25.1572 2.9 37.5 116.9 -5.2694 -4.0 11.8 GX 5-1 270.4513 -25.7480 6.8 38.1 117.2 2.4448 1.7 8.0 GRS 1758-258 274.0146 -13.9992 8.3 33.5 97.8 1.6389 1.4 2.3 GX 17+2 288.8161 10.9225 2.7 43.8 53.5 9.5818 4.3 1.7 GRS 1915+105 262.8571 -33.7674 23.5 40.8 133.0 -0.8672 -0.5 7.7 GX 354-0 273.6295 33.2088 3.2 39.8 14.1 2.9171 3.6 ------ UNKNOWN 261.3945 17.5403 2.7 21.2 23.0 2.1898 4.2 ------ UNKNOWN 217.4596 -43.4626 2.8 53.2 -179.4 7.1211 4.1 ------ UNKNOWN 210.8660 4.8138 2.4 34.3 -110.9 4.9028 4.8 ------ UNKNOWN 245.2197 62.4531 3.3 58.9 -24.3 14.9835 3.6 ------ UNKNOWN 198.6456 -8.3761 3.3 48.0 -128.9 9.4021 3.5 ------ UNKNOWN