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: Wed Jan 22 23:11:40 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger103780
======================================================================
Trigger: 00103780 Segment: 000
BAT Trigger Time: 128433653.44 [s; MET]
Trigger Stop: 128433661.632 [s; MET]
UTC: 2005-01-26T12:00:54.073440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 278.10963730402 Dec: 42.3890098675932 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12
Image Trigger?: NO
Rate S/N Ratio: 12.8062484748657 [ if not an image trigger ]
Image S/N Ratio: 12
Analysis Position: [ source = BAT ]
RA: 278.10963730402 Dec: 42.3890098675932 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 278.133001642437 Dec: 42.3940656811327 [deg; J2000]
{ 18h 32m 31.9s , +42d 23' 38.6" }
+/- 1.625895050218 [arcmin] (estimated 90% radius based on SNR)
+/- 0.720063313996255 [arcmin] (formal 1-sigma fit error)
SNR: 15.1899957712221
Angular difference between the analysis and refined position is 1.078875 arcmin
Partial Coding Fraction: 0.421875 [ including projection effects ]
Duration
T90: 48 +/- 22.6274169979695
Measured from: -11.4399999976158
to: 36.5600000023842 [s; relative to TRIGTIME]
T50: 16 +/- 16
Measured from: 4.56000000238419
to: 20.5600000023842 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 12.0600000023842
to: 13.0600000023842 [s; relative to TRIGTIME]
Total Fluence
Measured from: -11.4399999976158
to: 36.5600000023842 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.239909 0.571178 0.416573 0.103568
0.045804 0.048169 0.042418 0.035185 [error]
Peak 0.013804 0.005300 0.017414 0.006280
0.006629 0.007100 0.006165 0.004816 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 48.000 -11.440 36.560
T90 48.000 -11.440 36.560
T50 16.000 4.560 20.560
Peak 1.000 12.060 13.060
====== 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 -1.352 -0.168 0.169 - - - 1.89e-03 -1.94e-04 1.94e-04 73.370 57
CPL -0.592 -0.660 0.779 93.756 -26.125 231.264 4.55e-03 -2.38e-03 6.40e-03 69.400 56
=== 1-s peak 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 -1.156 -1.562 1.156 - - - 2.64e-03 -2.64e-03 1.32e-03 66.080 57
CPL -1.202 -1.530 2.510 9999.350 -9999.350 -9999.350 2.66e-03 N/A N/A 66.100 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 1.01e-07 2.03e-07 3.18e-07 1.10e-06 8.85e-07 1.72e-06 erg/cm2
90%_error_low -1.75e-08 -2.25e-08 -4.01e-08 -2.68e-07 -9.96e-08 -3.02e-07 erg/cm2
90%_error_hi 1.83e-08 2.24e-08 3.98e-08 3.21e-07 1.00e-07 3.45e-07 erg/cm2
Peak flux PL 7.70e-02 9.59e-02 8.69e-02 1.37e-01 3.07e-01 3.96e-01 ph/cm2/s
90%_error_low -7.70e-02 -9.59e-02 -8.69e-02 -1.37e-01 -3.07e-01 -2.01e-01 ph/cm2/s
90%_error_hi 1.28e-01 6.41e-02 4.71e-02 1.16e+00 1.73e-01 9.35e-01 ph/cm2/s
Fluence CPL 8.87e-08 2.20e-07 3.35e-07 4.03e-07 8.40e-07 1.05e-06 erg/cm2
90%_error_low -2.02e-08 -2.74e-08 -4.51e-08 -2.20e-07 -1.08e-07 -2.43e-07 erg/cm2
90%_error_hi 2.09e-08 2.85e-08 4.59e-08 5.44e-07 1.09e-07 5.37e-07 erg/cm2
Peak flux CPL N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_low -7.70e-02 -9.59e-02 -8.69e-02 -1.37e-01 -3.07e-01 -2.01e-01 ph/cm2/s
90%_error_hi 1.28e-01 6.41e-02 4.71e-02 1.16e+00 1.73e-01 9.35e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 278.1330 42.3941 0.0127 30.2098 -77.9318 1.4217865 15.190 TRIG_00103780 Foreground time interval of the image: -11.440 36.560 (delta_t = 48.000 [sec]) Background time interval of the image: -299.440 -11.440 (delta_t = 288.000 [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 -11.440 sec. to 36.560 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.35229 ( -0.168298 0.169232 ) Norm@50keV : 1.88907E-03 ( -0.000193957 0.000193757 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 73.37 using 59 PHA bins. # Reduced chi-squared = 1.287 for 57 degrees of freedom # Null hypothesis probability = 7.108824e-02 Photon flux (15-150 keV) in 48 sec: 0.227689 ( -0.023822 0.023864 ) ph/cm2/s Energy fluence (15-150 keV) : 8.85259e-07 ( -9.9587e-08 1.00342e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -11.440 sec. to 36.560 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.592022 ( -0.660261 0.779252 ) Epeak [keV] : 93.7560 ( -26.125 231.263 ) Norm@50keV : 4.54699E-03 ( -0.00238429 0.0063992 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 69.40 using 59 PHA bins. # Reduced chi-squared = 1.239 for 56 degrees of freedom # Null hypothesis probability = 1.076582e-01 Photon flux (15-150 keV) in 48 sec: 0.221539 ( -0.024402 0.024441 ) ph/cm2/s Energy fluence (15-150 keV) : 8.39947e-07 ( -1.08419e-07 1.08605e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 12.060 sec. to 13.060 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.15602 ( -1.56825 1.14943 ) Norm@50keV : 2.63713E-03 ( -0.00263425 0.00132485 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 66.08 using 59 PHA bins. # Reduced chi-squared = 1.159 for 57 degrees of freedom # Null hypothesis probability = 1.918645e-01 Photon flux (15-150 keV) in 1 sec: 0.306776 ( -0.306776 0.172651 ) ph/cm2/s Energy fluence (15-150 keV) : 2.71819e-08 ( -1.59364e-08 1.49005e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 12.060 sec. to 13.060 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -4.3119 ( -1.53133 2.50862 ) Epeak [keV] : 506.120 ( -9999.36 -9999.36 ) Norm@50keV : 1.31233E-04 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 64.39 using 59 PHA bins. # Reduced chi-squared = 1.150 for 56 degrees of freedom # Null hypothesis probability = 2.063795e-01 Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s Energy fluence (15-150 keV) : 1.04313e-08 ( 0 0 ) 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 = 1.217331865104005E-01, IMY = 5.693753405969912E-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: -299.440000 -11.440000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3780 35.4910 4.1 30.9 -38.8 0.5514 2.8 9.7 Her X-1 177.6491 44.5581 4.3 40.5 70.7 1.7158 2.7 ------ UNKNOWN 190.5708 33.7167 2.6 44.6 49.7 2.7855 4.5 ------ UNKNOWN 232.0837 65.9047 2.2 4.6 76.3 0.7775 5.3 ------ UNKNOWN 22.1461 51.7034 2.6 58.4 -172.5 4.6408 4.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -11.440000 36.560000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.6115 35.4393 9.2 31.0 -39.1 -0.0965 -1.2 9.5 Her X-1 226.7240 20.7672 2.6 46.2 0.6 0.5295 4.4 ------ UNKNOWN 245.7370 38.8535 2.6 26.9 -25.2 0.2690 4.4 ------ UNKNOWN 278.1330 42.3941 0.8 30.2 -77.9 1.4216 15.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 98.460600 302.602800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.7055 35.3538 0.0 19.4 18.4 -0.3432 -2.7 12.2 Her X-1 268.5102 -1.5277 8.1 44.8 -44.5 0.5753 1.4 9.6 SW J1753.5-0127 288.7718 10.9624 6.6 32.8 -77.8 -0.4249 -1.7 1.9 GRS 1915+105 299.5971 35.1983 0.3 18.2 -131.9 4.9651 34.6 0.4 Cyg X-1 308.1291 40.9657 1.3 22.4 -154.6 1.1712 8.8 1.2 Cyg X-3 326.2670 38.3045 7.8 36.5 -158.3 0.2926 1.5 4.6 Cyg X-2 219.5311 68.0512 2.3 39.7 91.9 2.8405 5.1 ------ UNKNOWN 303.6187 8.0069 4.0 41.1 -98.6 2.1060 2.9 ------ UNKNOWN