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: Sun Jan 12 05:59:21 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger544784
======================================================================
Trigger: 00544784 Segment: 000
BAT Trigger Time: 378843064 [s; MET]
Trigger Stop: 378843128 [s; MET]
UTC: 2013-01-02T18:10:53.944400 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 311.464423090679 Dec: 49.835123133839 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.9
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 9.9
Analysis Position: [ source = BAT ]
RA: 311.464423090679 Dec: 49.835123133839 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 311.415781472512 Dec: 49.8294447612168 [deg; J2000]
{ 20h 45m 39.8s , +49d 49' 46.0" }
+/- 2.29152214228455 [arcmin] (estimated 90% radius based on SNR)
+/- 1.19118543971485 [arcmin] (formal 1-sigma fit error)
SNR: 9.30369447055616
Angular difference between the analysis and refined position is 1.913092 arcmin
Partial Coding Fraction: 0.9921875 [ including projection effects ]
Duration
T90: 132.77999997139 +/- 17.7711381552947
Measured from: 22.339999973774
to: 155.119999945164 [s; relative to TRIGTIME]
T50: 71.3879999518394 +/- 44.1382417414895
Measured from: 28.0239999890327
to: 99.4119999408722 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 23.5320000052452
to: 24.5320000052452 [s; relative to TRIGTIME]
Total Fluence
Measured from: 15.3759999871254
to: 184.332000017166 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.410219 0.498311 0.466869 0.043131
0.062264 0.063334 0.055639 0.049096 [error]
Peak 0.012034 0.026223 0.009974 0.006073
0.004794 0.004910 0.004427 0.003817 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 168.956 15.376 184.332
T90 132.780 22.340 155.120
T50 71.388 28.024 99.412
Peak 1.000 23.532 24.532
====== 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 -1.546 -0.224 0.217 - - - 5.26e-04 -7.21e-05 7.12e-05 53.940 57
CPL -0.520 -0.913 1.166 71.991 -17.244 144.869 1.73e-03 -1.73e-03 4.57e-03 50.170 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 -1.646 -0.503 0.465 - - - 3.07e-03 -9.81e-04 9.44e-04 51.970 57
CPL -0.028 -2.145 4.785 49.402 N/A N/A 2.67e-02 N/A N/A 50.840 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 1.19e-07 2.12e-07 2.90e-07 8.23e-07 8.38e-07 1.44e-06 erg/cm2
90%_error_low -2.34e-08 -2.75e-08 -5.22e-08 -2.71e-07 -1.24e-07 -3.24e-07 erg/cm2
90%_error_hi 2.46e-08 2.74e-08 5.22e-08 3.47e-07 1.27e-07 3.86e-07 erg/cm2
Peak flux PL 1.45e-01 1.34e-01 8.56e-02 8.41e-02 4.00e-01 4.49e-01 ph/cm2/s
90%_error_low -5.59e-02 -3.67e-02 -3.41e-02 -5.06e-02 -1.09e-01 -1.27e-01 ph/cm2/s
90%_error_hi 6.03e-02 3.67e-02 3.50e-02 8.38e-02 1.09e-01 1.31e-01 ph/cm2/s
Fluence CPL 9.94e-08 2.34e-07 3.07e-07 2.41e-07 7.83e-07 8.81e-07 erg/cm2
90%_error_low -2.97e-08 -3.39e-08 -5.93e-08 -1.51e-07 -1.28e-07 -2.00e-07 erg/cm2
90%_error_hi 3.00e-08 3.53e-08 6.06e-08 4.63e-07 1.34e-07 4.65e-07 erg/cm2
Peak flux CPL 1.25e-01 1.62e-01 7.82e-02 1.07e-02 3.75e-01 3.76e-01 ph/cm2/s
90%_error_low -6.82e-02 -9.22e-02 -7.82e-02 -1.07e-02 -1.12e-01 -1.13e-01 ph/cm2/s
90%_error_hi 6.90e-02 6.02e-02 4.42e-02 9.35e-02 1.16e-01 1.58e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 311.4158 49.8294 0.0205 9.9963 -74.3773 0.8287199 9.304 TRIG_00544784 Foreground time interval of the image: 15.376 73.501 (delta_t = 58.125 [sec]) Background time interval of the image: -79.499 15.376 (delta_t = 94.875 [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 15.376 sec. to 184.332 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.54628 ( -0.224206 0.217475 ) Norm@50keV : 5.26418E-04 ( -7.20957e-05 7.11868e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.94 using 59 PHA bins. # Reduced chi-squared = 0.9463 for 57 degrees of freedom # Null hypothesis probability = 5.905744e-01 Photon flux (15-150 keV) in 169 sec: 6.65718E-02 ( -0.0085272 0.0085329 ) ph/cm2/s Energy fluence (15-150 keV) : 8.38083e-07 ( -1.24463e-07 1.26716e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 15.376 sec. to 184.332 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.519519 ( -0.912842 1.1659 ) Epeak [keV] : 71.9912 ( -17.2513 144.861 ) Norm@50keV : 1.72869E-03 ( -0.00172829 0.00456877 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 50.17 using 59 PHA bins. # Reduced chi-squared = 0.8958 for 56 degrees of freedom # Null hypothesis probability = 6.943216e-01 Photon flux (15-150 keV) in 169 sec: 6.36661E-02 ( -0.0089779 0.0089356 ) ph/cm2/s Energy fluence (15-150 keV) : 7.8328e-07 ( -1.28271e-07 1.34032e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 23.532 sec. to 24.532 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.64619 ( -0.502543 0.464745 ) Norm@50keV : 3.06538E-03 ( -0.000980399 0.000943984 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.97 using 59 PHA bins. # Reduced chi-squared = 0.9118 for 57 degrees of freedom # Null hypothesis probability = 6.635907e-01 Photon flux (15-150 keV) in 1 sec: 0.399777 ( -0.109141 0.109142 ) ph/cm2/s Energy fluence (15-150 keV) : 2.85227e-08 ( -9.32099e-09 9.88957e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 23.532 sec. to 24.532 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.0283379 ( -2.21205 4.71846 ) Epeak [keV] : 49.4019 ( ) Norm@50keV : 2.67420E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 50.83 using 59 PHA bins. # Reduced chi-squared = 0.9077 for 56 degrees of freedom # Null hypothesis probability = 6.703997e-01 Photon flux (15-150 keV) in 1 sec: 0.374696 ( -0.11171 0.116163 ) ph/cm2/s Energy fluence (15-150 keV) : 2.32798e-08 ( -8.47065e-09 1.27067e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 132.78 sec. Hardness ratio (energy fluence ratio) = 1.36958818414
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 3.305736e-07 S(50-150 keV) = 5.075131e-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 = 4.746703492567145E-02, IMY = 1.697480824723668E-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: -79.499410 15.376000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3043 35.2955 5.8 50.8 -35.9 0.6389 2.0 8.0 Her X-1 299.5096 35.2196 3.2 26.8 -82.8 0.4543 3.6 4.1 Cyg X-1 308.0299 41.0014 1.9 18.4 -89.8 0.6610 6.2 4.7 Cyg X-3 326.3548 38.3878 4.4 17.5 -137.5 0.2346 2.6 9.5 Cyg X-2 142.2661 78.0048 2.5 46.2 47.5 2.0893 4.7 ------ UNKNOWN 178.9958 73.9547 2.9 48.2 34.7 1.5363 4.0 ------ UNKNOWN 318.4352 54.7423 3.1 3.7 -57.1 0.3455 3.7 ------ UNKNOWN 341.9291 12.7988 2.6 45.0 -157.3 0.7859 4.5 ------ UNKNOWN 344.0895 0.4311 2.4 57.6 -156.4 2.7496 4.8 ------ UNKNOWN 260.3541 30.9959 2.4 50.6 -44.5 2.2444 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 15.376000 73.500600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5630 35.4565 6.7 50.6 -36.0 0.4980 1.7 8.6 Her X-1 299.4786 35.3268 6.9 26.7 -82.6 -0.1946 -1.7 9.3 Cyg X-1 308.0140 41.1094 9.2 18.3 -89.6 -0.1163 -1.3 10.4 Cyg X-3 326.0911 38.4653 6.6 17.4 -136.8 0.1529 1.7 9.4 Cyg X-2 311.4158 49.8294 1.2 10.0 -74.4 0.8285 9.3 ------ UNKNOWN 240.8598 38.5768 2.3 55.8 -23.3 1.6983 5.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 105.300600 963.079200 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4578 35.3319 2.5 43.2 -23.3 3.2669 4.5 0.6 Her X-1 299.5410 35.1970 2.2 17.0 -80.9 2.4353 5.2 2.4 Cyg X-1 308.1023 40.9473 0.8 9.2 -100.0 6.0987 13.6 0.5 Cyg X-3 326.1299 38.3888 5.3 15.5 -164.0 0.9051 2.2 4.5 Cyg X-2 298.6654 61.5493 2.8 13.7 37.5 1.6835 4.1 ------ UNKNOWN 328.6771 41.8492 2.8 14.4 -178.8 1.8157 4.2 ------ UNKNOWN 231.4250 41.9083 2.8 53.6 -1.7 5.4810 4.1 ------ UNKNOWN 346.3159 7.7586 2.5 51.1 -162.7 5.0441 4.6 ------ UNKNOWN 260.4367 19.0465 3.6 50.7 -44.4 7.8922 3.2 ------ UNKNOWN 288.6512 13.2387 2.6 41.1 -81.0 8.6273 4.4 ------ UNKNOWN