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: Sat Oct 4 21:25:56 EDT 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger604232
======================================================================
Trigger: 00604232 Segment: 000
BAT Trigger Time: 426969837.376 [s; MET]
Trigger Stop: 426969837.888 [s; MET]
UTC: 2014-07-13T18:43:45.115400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 281.114083816983 Dec: 59.6247281361308 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.98
Image Trigger?: NO
Rate S/N Ratio: 31.6069612585582 [ if not an image trigger ]
Image S/N Ratio: 11.98
Analysis Position: [ source = BAT ]
RA: 281.114083816983 Dec: 59.6247281361308 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 281.141369040742 Dec: 59.6226563752735 [deg; J2000]
{ 18h 44m 33.9s , +59d 37' 21.6" }
+/- 1.17974812009679 [arcmin] (estimated 90% radius based on SNR)
+/- 0.500289176102019 [arcmin] (formal 1-sigma fit error)
SNR: 24.0194050398082
Angular difference between the analysis and refined position is 0.837131 arcmin
Partial Coding Fraction: 0.9765625 [ including projection effects ]
Duration
T90: 6.01599997282028 +/- 0.728065956518166
Measured from: 0.0360000133514404
to: 6.05199998617172 [s; relative to TRIGTIME]
T50: 3.41999989748001 +/- 0.700139972863795
Measured from: 0.548000037670135
to: 3.96799993515015 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.107999980449677
to: 0.892000019550323 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.107999980449677
to: 6.67599999904633 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.229241 0.272784 0.135592 0.034707
0.016392 0.016965 0.014456 0.011646 [error]
Peak 0.060167 0.098787 0.065418 0.015238
0.006960 0.007579 0.006687 0.004920 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 6.784 -0.108 6.676
T90 6.016 0.036 6.052
T50 3.420 0.548 3.968
Peak 1.000 -0.108 0.892
====== 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 -1.843 -0.141 0.138 - - - 5.86e-03 -5.19e-04 5.11e-04 79.230 57
CPL -1.816 -0.461 0.527 296.903 N/A N/A 6.07e-03 N/A N/A 79.220 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 -1.458 -0.154 0.153 - - - 1.56e-02 -1.45e-03 1.45e-03 60.400 57
CPL -1.233 -0.315 0.608 164.062 -164.062 -164.062 2.06e-02 -6.98e-03 2.18e-02 59.910 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 7.01e-08 1.05e-07 1.17e-07 2.46e-07 3.66e-07 5.37e-07 erg/cm2
90%_error_low -7.84e-09 -7.79e-09 -1.40e-08 -5.52e-08 -3.23e-08 -7.03e-08 erg/cm2
90%_error_hi 8.01e-09 7.80e-09 1.42e-08 6.54e-08 3.27e-08 7.81e-08 erg/cm2
Peak flux PL 6.18e-01 6.38e-01 4.64e-01 5.42e-01 1.93e+00 2.26e+00 ph/cm2/s
90%_error_low -9.18e-02 -6.07e-02 -5.42e-02 -1.18e-01 -1.75e-01 -2.09e-01 ph/cm2/s
90%_error_hi 9.51e-02 6.03e-02 5.39e-02 1.37e-01 1.75e-01 2.11e-01 ph/cm2/s
Fluence CPL 6.99e-08 1.05e-07 1.17e-07 2.33e-07 3.65e-07 5.25e-07 erg/cm2
90%_error_low -8.41e-09 -8.13e-09 -1.44e-08 -1.44e-07 -3.87e-08 -1.51e-07 erg/cm2
90%_error_hi 8.31e-09 1.03e-08 1.42e-08 5.13e-08 3.35e-08 1.34e-07 erg/cm2
Peak flux CPL 5.98e-01 6.54e-01 4.72e-01 4.04e-01 1.92e+00 2.13e+00 ph/cm2/s
90%_error_low -1.04e-01 -7.07e-02 -5.77e-02 -2.03e-01 -1.78e-01 -2.76e-01 ph/cm2/s
90%_error_hi 1.06e-01 7.46e-02 5.91e-02 1.77e-01 1.78e-01 2.65e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 281.1414 59.6227 0.0080 19.2825 -6.4141 0.7235869 24.019 TRIG_00604232 Foreground time interval of the image: -0.108 6.676 (delta_t = 6.784 [sec]) Background time interval of the image: -232.475 -0.108 (delta_t = 232.367 [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 -0.108 sec. to 6.676 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.84272 ( -0.141285 0.137866 ) Norm@50keV : 5.86057E-03 ( -0.000518551 0.000510705 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 79.23 using 59 PHA bins. # Reduced chi-squared = 1.390 for 57 degrees of freedom # Null hypothesis probability = 2.737405e-02 Photon flux (15-150 keV) in 6.784 sec: 0.821385 ( -0.061774 0.061798 ) ph/cm2/s Energy fluence (15-150 keV) : 3.65667e-07 ( -3.22899e-08 3.27389e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.108 sec. to 6.676 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.81641 ( -0.460424 0.526994 ) Epeak [keV] : 296.903 ( ) Norm@50keV : 6.06802E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 79.22 using 59 PHA bins. # Reduced chi-squared = 1.415 for 56 degrees of freedom # Null hypothesis probability = 2.224400e-02 Photon flux (15-150 keV) in 6.784 sec: 0.820513 ( -0.0638 0.062449 ) ph/cm2/s Energy fluence (15-150 keV) : 3.64532e-07 ( -3.8706e-08 3.35071e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.108 sec. to 0.892 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.45831 ( -0.154072 0.153052 ) Norm@50keV : 1.56299E-02 ( -0.00145405 0.00144564 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 60.40 using 59 PHA bins. # Reduced chi-squared = 1.060 for 57 degrees of freedom # Null hypothesis probability = 3.538872e-01 Photon flux (15-150 keV) in 1 sec: 1.93022 ( -0.1747 0.1748 ) ph/cm2/s Energy fluence (15-150 keV) : 1.49359e-07 ( -1.53481e-08 1.55218e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.108 sec. to 0.892 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.23269 ( -0.315473 0.608102 ) Epeak [keV] : 164.062 ( -164.065 -164.065 ) Norm@50keV : 2.05548E-02 ( -0.00698281 0.0218212 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.91 using 59 PHA bins. # Reduced chi-squared = 1.070 for 56 degrees of freedom # Null hypothesis probability = 3.359586e-01 Photon flux (15-150 keV) in 1 sec: 1.91531 ( -0.17845 0.17833 ) ph/cm2/s Energy fluence (15-150 keV) : 1.4647e-07 ( -1.7113e-08 1.69405e-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 = 3.476618081882924E-01, IMY = 3.908299903426914E-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: -232.475400 -0.108000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5010 35.3674 99.0 14.6 116.7 -0.0250 -0.1 2.6 Her X-1 299.5915 35.2156 1.2 37.3 39.7 3.8961 9.7 0.8 Cyg X-1 308.0847 40.9501 2.3 39.5 26.0 1.8611 4.9 1.2 Cyg X-3 326.0415 38.4416 0.0 52.2 17.7 -2.0285 -2.6 9.4 Cyg X-2 251.7967 52.8548 3.1 3.0 -56.0 0.7028 3.7 ------ UNKNOWN 288.1304 60.7790 2.5 22.9 -7.1 0.9622 4.6 ------ UNKNOWN 211.4953 23.4468 2.6 41.0 -169.9 1.4195 4.4 ------ UNKNOWN 342.2398 67.8101 2.9 45.1 -22.6 1.4403 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.108000 6.676000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.2039 35.3866 0.0 14.6 117.7 0.0571 1.7 12.7 Her X-1 299.4219 35.2151 3.5 37.2 39.9 0.2059 3.3 8.3 Cyg X-1 308.3002 40.9345 7.5 39.6 25.9 -0.0925 -1.5 8.7 Cyg X-3 326.2380 38.2814 8.8 52.4 17.7 -0.1973 -1.3 3.9 Cyg X-2 244.4540 3.1140 2.2 47.2 135.3 0.7754 5.2 ------ UNKNOWN 234.3331 6.3573 2.4 45.9 149.8 0.4271 4.8 ------ UNKNOWN 328.1057 40.4909 2.3 52.2 14.4 0.6045 5.0 ------ UNKNOWN 328.8664 40.9995 1.8 52.3 13.4 0.7643 6.5 ------ UNKNOWN 281.1414 59.6227 0.5 19.3 -6.4 0.7236 24.0 ------ UNKNOWN 198.1105 15.3003 2.5 55.3 -163.7 0.4485 4.7 ------ UNKNOWN 189.4874 20.6794 2.2 56.7 -152.0 0.8825 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 57.124600 962.645500 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3366 35.4438 6.8 29.8 149.0 1.4877 1.7 8.5 Her X-1 299.6127 35.2094 0.6 27.2 66.8 16.0016 19.4 1.2 Cyg X-1 308.0687 40.9946 1.7 25.0 47.4 5.1274 6.9 3.1 Cyg X-3 326.0561 38.4576 6.4 35.2 27.8 1.6134 1.8 9.8 Cyg X-2 246.4775 36.4639 2.4 32.1 160.7 4.1978 4.7 ------ UNKNOWN 354.3413 37.9714 2.7 49.8 2.7 6.0248 4.3 ------ UNKNOWN 2.1146 34.1192 2.8 56.7 -0.5 11.2084 4.2 ------ UNKNOWN 353.1772 48.8426 3.0 41.2 -6.9 3.4563 3.8 ------ UNKNOWN 18.3603 40.2213 3.9 59.4 -17.1 13.6595 3.0 ------ UNKNOWN 200.6303 31.2551 4.7 58.7 -159.2 13.5458 2.5 ------ UNKNOWN 55.0507 71.6849 3.0 44.9 -60.0 12.0660 3.8 ------ UNKNOWN