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 03:25:53 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger555600
======================================================================
Trigger: 00555600 Segment: 000
BAT Trigger Time: 389964657.984 [s; MET]
Trigger Stop: 389964658.496 [s; MET]
UTC: 2013-05-11T11:30:47.441540 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 196.638702463752 Dec: 18.6976486270083 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.07
Image Trigger?: NO
Rate S/N Ratio: 17.0293863659264 [ if not an image trigger ]
Image S/N Ratio: 9.07
Analysis Position: [ source = BAT ]
RA: 196.638702463752 Dec: 18.6976486270083 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 196.647862245518 Dec: 18.6927658786719 [deg; J2000]
{ 13h 06m 35.5s , +18d 41' 34.0" }
+/- 1.93788954164244 [arcmin] (estimated 90% radius based on SNR)
+/- 0.887382560638733 [arcmin] (formal 1-sigma fit error)
SNR: 11.8208403788463
Angular difference between the analysis and refined position is 0.597362 arcmin
Partial Coding Fraction: 0.5703125 [ including projection effects ]
Duration
T90: 2.7399999499321 +/- 0.397854255722736
Measured from: -0.0120000243186951
to: 2.7279999256134 [s; relative to TRIGTIME]
T50: 1.87199991941452 +/- 0.397854255722736
Measured from: 0.175999999046326
to: 2.04799991846085 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0860000252723694
to: 0.913999974727631 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.0720000267028809
to: 2.83199995756149 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.090618 0.086440 0.086362 0.039342
0.013742 0.014342 0.012778 0.011516 [error]
Peak 0.050412 0.060474 0.048483 0.010733
0.008424 0.009037 0.008097 0.007046 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 2.904 -0.072 2.832
T90 2.740 -0.012 2.728
T50 1.872 0.176 2.048
Peak 1.000 -0.086 0.914
====== 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 -1.359 -0.279 0.280 - - - 6.13e-03 -9.53e-04 9.47e-04 53.880 57
CPL -1.325 -1.379 0.877 982.396 -982.396 -982.396 6.39e-03 -1.19e-03 -6.39e-03 53.920 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 -1.441 -0.280 0.280 - - - 1.03e-02 -1.73e-03 1.72e-03 65.080 57
CPL -1.285 N/A N/A 215.052 N/A N/A 1.25e-02 N/A N/A 65.000 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 1.99e-08 3.99e-08 6.23e-08 2.14e-07 1.74e-07 3.36e-07 erg/cm2
90%_error_low -5.30e-09 -6.62e-09 -1.26e-08 -8.10e-08 -3.03e-08 -9.22e-08 erg/cm2
90%_error_hi 5.65e-09 6.49e-09 1.24e-08 1.11e-07 3.08e-08 1.17e-07 erg/cm2
Peak flux PL 4.00e-01 4.16e-01 3.07e-01 3.64e-01 1.26e+00 1.49e+00 ph/cm2/s
90%_error_low -1.06e-01 -7.20e-02 -6.49e-02 -1.35e-01 -2.07e-01 -2.49e-01 ph/cm2/s
90%_error_hi 1.12e-01 7.11e-02 6.42e-02 1.78e-01 2.07e-01 2.54e-01 ph/cm2/s
Fluence CPL 2.01e-08 3.97e-08 6.20e-08 2.23e-07 1.74e-07 3.23e-07 erg/cm2
90%_error_low -6.05e-09 -6.59e-09 -1.27e-08 -1.64e-07 -3.25e-08 -1.45e-07 erg/cm2
90%_error_hi 5.67e-09 7.03e-09 1.34e-08 4.74e-08 2.22e-08 1.24e-07 erg/cm2
Peak flux CPL 3.92e-01 4.25e-01 3.10e-01 2.92e-01 1.26e+00 1.42e+00 ph/cm2/s
90%_error_low -1.17e-01 -7.86e-02 -6.70e-02 -2.92e-01 -2.10e-01 -3.16e-01 ph/cm2/s
90%_error_hi 1.15e-01 9.02e-02 6.97e-02 1.53e-01 2.10e-01 3.16e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 196.6479 18.6928 0.0163 23.3829 64.3599 0.3039897 11.821 TRIG_00555600 Foreground time interval of the image: -0.072 2.832 (delta_t = 2.904 [sec]) Background time interval of the image: -239.984 -0.072 (delta_t = 239.912 [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 -0.072 sec. to 2.832 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.3591 ( -0.279249 0.279662 ) Norm@50keV : 6.13270E-03 ( -0.000953225 0.000947467 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.88 using 59 PHA bins. # Reduced chi-squared = 0.9453 for 57 degrees of freedom # Null hypothesis probability = 5.928368e-01 Photon flux (15-150 keV) in 2.904 sec: 0.740221 ( -0.114773 0.114983 ) ph/cm2/s Energy fluence (15-150 keV) : 1.73611e-07 ( -3.03468e-08 3.08155e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.072 sec. to 2.832 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.35588 ( -1.37906 0.877069 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 6.15607E-03 ( -0.000959513 -0.00615621 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.88 using 59 PHA bins. # Reduced chi-squared = 0.9622 for 56 degrees of freedom # Null hypothesis probability = 5.553756e-01 Photon flux (15-150 keV) in 2.904 sec: 0.744662 ( ) ph/cm2/s Energy fluence (15-150 keV) : 1.74228e-07 ( -3.25384e-08 2.22381e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.086 sec. to 0.914 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.44142 ( -0.280317 0.280249 ) Norm@50keV : 1.02726E-02 ( -0.0017346 0.00171633 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 65.08 using 59 PHA bins. # Reduced chi-squared = 1.142 for 57 degrees of freedom # Null hypothesis probability = 2.160607e-01 Photon flux (15-150 keV) in 1 sec: 1.26331 ( -0.20658 0.20675 ) ph/cm2/s Energy fluence (15-150 keV) : 9.84714e-08 ( -1.83276e-08 1.86699e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.086 sec. to 0.914 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.28493 ( ) Epeak [keV] : 215.052 ( ) Norm@50keV : 1.24761E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 65.00 using 59 PHA bins. # Reduced chi-squared = 1.161 for 56 degrees of freedom # Null hypothesis probability = 1.918498e-01 Photon flux (15-150 keV) in 1 sec: 1.25675 ( -0.21007 0.21023 ) ph/cm2/s Energy fluence (15-150 keV) : 9.69483e-08 ( -2.0786e-08 1.98052e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 2.74 sec. Hardness ratio (energy fluence ratio) = 1.55933724951
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 5.985375e-08 S(50-150 keV) = 1.1375621e-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 = 1.871003769884335E-01, IMY = -3.898075904469647E-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: -239.984000 -0.072000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 162.0579 -21.7845 2.5 50.7 150.0 5.3870 4.6 ------ UNKNOWN 204.0058 17.0584 2.8 30.4 60.7 1.2889 4.1 ------ UNKNOWN 161.5089 -3.9707 2.3 33.6 158.0 1.6129 5.0 ------ UNKNOWN 153.4806 -10.6746 3.2 42.9 165.8 1.5773 3.6 ------ UNKNOWN 125.8726 -9.8181 3.5 59.1 -165.9 4.4855 3.3 ------ UNKNOWN 122.6051 -5.1641 4.2 58.8 -159.3 3.8369 2.8 ------ UNKNOWN 148.1494 72.8606 3.2 47.1 -53.1 3.3602 3.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.072000 2.832000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 161.4060 -13.9518 2.2 43.2 153.4 0.2407 5.2 ------ UNKNOWN 196.6479 18.6928 1.0 23.4 64.4 0.3040 11.8 ------ UNKNOWN 130.3118 11.3172 2.3 43.3 -146.9 0.1820 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 55.916600 962.097900 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3700 35.2140 6.2 53.3 12.1 -4.2776 -1.9 8.8 Her X-1 243.4681 9.3929 2.4 46.3 47.4 10.9697 4.7 ------ UNKNOWN 202.7544 -18.1355 3.6 37.3 122.9 4.3798 3.2 ------ UNKNOWN 225.3338 17.6286 2.8 27.3 40.2 2.5779 4.2 ------ UNKNOWN 249.6084 37.0926 2.6 49.6 9.3 5.7770 4.5 ------ UNKNOWN 211.0683 19.3219 3.0 13.7 37.6 2.1381 3.9 ------ UNKNOWN 178.3899 5.5220 4.2 22.1 -171.8 1.5573 3.1 ------ UNKNOWN 178.3471 5.9414 4.9 21.9 -170.8 1.4822 2.9 ------ UNKNOWN 247.9127 61.2625 3.8 55.5 -20.4 5.8632 3.0 ------ UNKNOWN 143.3998 -7.6270 4.2 58.7 -159.2 11.8164 2.8 ------ UNKNOWN 143.2311 -5.2797 3.4 57.8 -156.6 12.5278 3.3 ------ UNKNOWN 186.8210 65.4180 3.7 47.2 -53.0 8.9810 3.1 ------ UNKNOWN