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 23:25:21 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger100703
======================================================================
Trigger: 00100703 Segment: 000
BAT Trigger Time: 125612457.024 [s; MET]
Trigger Stop: 125612458.048 [s; MET]
UTC: 2004-12-24T20:20:57.698840 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 56.1991351820266 Dec: -6.61701115766916 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10
Image Trigger?: NO
Rate S/N Ratio: 19.824227601599 [ if not an image trigger ]
Image S/N Ratio: 10
Analysis Position: [ source = BAT ]
RA: 56.1991351820266 Dec: -6.61701115766916 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 56.1934089128069 Dec: -6.66233417072409 [deg; J2000]
{ 03h 44m 46.4s , -06d 39' 44.4" }
+/- 1.98543805277974 [arcmin] (estimated 90% radius based on SNR)
+/- 0.900451969225868 [arcmin] (formal 1-sigma fit error)
SNR: 11.4185069616262
Angular difference between the analysis and refined position is 2.740711 arcmin
Partial Coding Fraction: 0.2578125 [ including projection effects ]
Duration
T90: 177.56400001049 +/- 19.260284628303
Measured from: -93.6480000019073
to: 83.9160000085831 [s; relative to TRIGTIME]
T50: 38.1920000165701 +/- 4.08676156199759
Measured from: -12.0920000076294
to: 26.1000000089407 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0600000023841858
to: 0.939999997615814 [s; relative to TRIGTIME]
Total Fluence
Measured from: -110.652000010014
to: 116.271999999881 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.799961 5.664382 3.703137 0.744129
0.137476 0.143969 0.123508 0.099513 [error]
Peak 0.069149 0.130282 0.122700 0.034268
0.010306 0.012011 0.011283 0.008051 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 226.924 -110.652 116.272
T90 177.564 -93.648 83.916
T50 38.192 -12.092 26.100
Peak 1.000 -0.060 0.940
====== 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: CPL)
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 -1.730 -0.058 0.058 - - - 4.32e-03 -1.44e-04 1.43e-04 62.970 57
CPL -0.978 -0.264 0.281 68.865 -6.893 11.594 1.01e-02 -2.57e-03 3.72e-03 36.770 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 -1.260 -0.157 0.158 - - - 2.48e-02 -2.44e-03 2.43e-03 74.400 57
CPL -0.698 -0.613 0.725 129.138 -44.447 -129.138 4.54e-02 -2.14e-02 5.05e-02 72.080 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 1.54e-06 2.47e-06 2.97e-06 7.01e-06 9.00e-06 1.40e-05 erg/cm2
90%_error_low -8.86e-08 -8.63e-08 -1.26e-07 -6.20e-07 -3.07e-07 -7.18e-07 erg/cm2
90%_error_hi 9.02e-08 8.62e-08 1.26e-07 6.57e-07 3.08e-07 7.45e-07 erg/cm2
Peak flux PL 8.11e-01 9.42e-01 7.86e-01 1.11e+00 2.94e+00 3.65e+00 ph/cm2/s
90%_error_low -1.43e-01 -1.08e-01 -8.74e-02 -2.31e-01 -3.00e-01 -3.66e-01 ph/cm2/s
90%_error_hi 1.50e-01 1.07e-01 8.65e-02 2.63e-01 3.00e-01 3.69e-01 ph/cm2/s
Fluence CPL 1.33e-06 2.62e-06 3.10e-06 2.80e-06 8.55e-06 9.85e-06 erg/cm2
90%_error_low -1.09e-07 -1.03e-07 -1.42e-07 -6.82e-07 -3.44e-07 -7.57e-07 erg/cm2
90%_error_hi 1.11e-07 1.04e-07 1.43e-07 9.40e-07 3.44e-07 9.79e-07 erg/cm2
Peak flux CPL 7.15e-01 9.85e-01 8.47e-01 6.67e-01 2.90e+00 3.21e+00 ph/cm2/s
90%_error_low -1.74e-01 -1.21e-01 -1.10e-01 -2.82e-01 -3.04e-01 -4.25e-01 ph/cm2/s
90%_error_hi 1.82e-01 1.24e-01 1.13e-01 5.32e-01 3.04e-01 5.77e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 56.1934 -6.6623 0.0169 40.1667 35.6071 14.1896232 11.419 TRIG_00100703 Foreground time interval of the image: -110.652 80.622 (delta_t = 191.274 [sec]) 81.976 116.272 (delta_t = 34.296 [sec]) Background time interval of the image: -119.523 -110.652 (delta_t = 8.871 [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
Multiple GTIs in the spectrum tstart tstop -110.652000 80.622000 81.976000 116.272000 Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.7301 ( -0.0580438 0.0577769 ) Norm@50keV : 4.31580E-03 ( -0.000143515 0.000143351 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 62.97 using 59 PHA bins. # Reduced chi-squared = 1.105 for 57 degrees of freedom # Null hypothesis probability = 2.733442e-01 Photon flux (15-150 keV) in 225.6 sec: 0.579374 ( -0.020573 0.020628 ) ph/cm2/s Energy fluence (15-150 keV) : 8.99661e-06 ( -3.07425e-07 3.07804e-07 ) ergs/cm2
Cutoff power-law model
Multiple GTIs in the spectrum tstart tstop -110.652000 80.622000 81.976000 116.272000 Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.977789 ( -0.264233 0.281082 ) Epeak [keV] : 68.8655 ( -6.89309 11.5944 ) Norm@50keV : 1.01353E-02 ( -0.00257381 0.00372491 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 36.77 using 59 PHA bins. # Reduced chi-squared = 0.6567 for 56 degrees of freedom # Null hypothesis probability = 9.780264e-01 Photon flux (15-150 keV) in 225.6 sec: 0.553113 ( -0.022166 0.022245 ) ph/cm2/s Energy fluence (15-150 keV) : 8.55065e-06 ( -3.43747e-07 3.436e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.060 sec. to 0.940 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.25991 ( -0.157358 0.15849 ) Norm@50keV : 2.47986E-02 ( -0.0024352 0.002435 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 74.40 using 59 PHA bins. # Reduced chi-squared = 1.305 for 57 degrees of freedom # Null hypothesis probability = 6.067524e-02 Photon flux (15-150 keV) in 1 sec: 2.93782 ( -0.29988 0.3004 ) ph/cm2/s Energy fluence (15-150 keV) : 2.47571e-07 ( -2.60831e-08 2.61449e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.060 sec. to 0.940 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.69835 ( -0.613336 0.725181 ) Epeak [keV] : 129.138 ( -44.4468 -129.138 ) Norm@50keV : 4.53865E-02 ( -0.0213979 0.0504944 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 72.08 using 59 PHA bins. # Reduced chi-squared = 1.287 for 56 degrees of freedom # Null hypothesis probability = 7.271384e-02 Photon flux (15-150 keV) in 1 sec: 2.89687 ( -0.30393 0.30421 ) ph/cm2/s Energy fluence (15-150 keV) : 2.43775e-07 ( -2.70445e-08 2.68762e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 177.564 sec. Hardness ratio (energy fluence ratio) = 1.18364126386
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 3.95482e-06 S(50-150 keV) = 4.595785e-06
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 = 6.862540828690745E-01, IMY = -4.914374216376731E-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: -119.523410 -110.652000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.3878 -40.4758 5.6 37.4 -148.8 0.0647 2.1 8.0 Vela X-1 139.4992 -34.6510 2.1 41.2 -157.5 0.1869 5.5 ------ UNKNOWN 138.7935 -41.1302 2.2 39.9 -147.6 0.1798 5.2 ------ UNKNOWN 156.4968 -27.3626 2.1 57.2 -161.4 0.6058 5.4 ------ UNKNOWN 151.1890 -53.4757 2.1 48.3 -129.9 0.5718 5.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -110.652000 80.622000 81.976000 116.272000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.6790 -40.5656 4.2 37.6 -148.7 2.3091 2.8 6.9 Vela X-1 56.1934 -6.6624 1.0 40.2 35.6 14.1909 11.4 ------ UNKNOWN 25.9485 -57.3659 2.2 50.0 -46.3 15.3902 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: -299.024000 80.622000 81.976000 302.981200 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5388 -40.5333 1.4 37.5 -148.7 3.3914 8.0 1.4 Vela X-1 56.1982 -6.6633 0.4 40.2 35.6 15.2135 29.2 ------ UNKNOWN 132.8856 -12.1412 2.7 44.0 168.0 2.1457 4.3 ------ UNKNOWN 33.7179 -46.0780 3.5 45.1 -31.1 1.6770 3.3 ------ UNKNOWN 151.5337 -53.2144 4.5 48.5 -130.2 3.5988 2.5 ------ UNKNOWN