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 23:20:41 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger100970
======================================================================
Trigger: 00100970 Segment: 000
BAT Trigger Time: 125923753.472 [s; MET]
Trigger Stop: 125923769.856 [s; MET]
UTC: 2004-12-28T10:49:14.142460 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 336.648289388184 Dec: 5.03633072641599 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 16
Image Trigger?: NO
Rate S/N Ratio: 26.7955220139485 [ if not an image trigger ]
Image S/N Ratio: 16
Analysis Position: [ source = BAT ]
RA: 336.648289388184 Dec: 5.03633072641599 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 336.649614099292 Dec: 5.02731446088863 [deg; J2000]
{ 22h 26m 35.9s , +05d 01' 38.3" }
+/- 0.887651757061631 [arcmin] (estimated 90% radius based on SNR)
+/- 0.30589196498394 [arcmin] (formal 1-sigma fit error)
SNR: 36.0626385020167
Angular difference between the analysis and refined position is 0.546739 arcmin
Partial Coding Fraction: 0.4257812 [ including projection effects ]
Duration
T90: 56.3000000119209 +/- 7.78277277125783
Measured from: 1.33599999547005
to: 57.636000007391 [s; relative to TRIGTIME]
T50: 20.0840000212193 +/- 2.05039019772188
Measured from: 10.3559999912977
to: 30.440000012517 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 22.027999997139
to: 23.027999997139 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.73600000143051
to: 70.7000000029802 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.523095 1.943263 1.538650 0.442768
0.071782 0.072893 0.062870 0.054898 [error]
Peak 0.062506 0.056563 0.048736 0.018513
0.008703 0.009098 0.007731 0.006410 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 73.436 -2.736 70.700
T90 56.300 1.336 57.636
T50 20.084 10.356 30.440
Peak 1.000 22.028 23.028
====== 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 -1.588 -0.079 0.079 - - - 5.18e-03 -2.15e-04 2.14e-04 63.600 57
CPL -1.586 -0.080 0.146 9999.360 -9999.360 -9999.360 5.19e-03 -2.15e-04 9.82e-04 63.630 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 -1.702 -0.267 0.259 - - - 1.22e-02 -1.87e-03 1.84e-03 48.070 57
CPL -1.707 -0.263 0.267 9999.270 -9999.260 -9999.270 1.22e-02 -1.84e-03 1.52e-02 48.070 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 5.28e-07 9.18e-07 1.22e-06 3.32e-06 3.56e-06 5.99e-06 erg/cm2
90%_error_low -4.26e-08 -4.35e-08 -6.37e-08 -3.78e-07 -1.54e-07 -4.16e-07 erg/cm2
90%_error_hi 4.39e-08 4.33e-08 6.34e-08 4.10e-07 1.54e-07 4.40e-07 erg/cm2
Peak flux PL 6.10e-01 5.45e-01 3.35e-01 3.12e-01 1.62e+00 1.80e+00 ph/cm2/s
90%_error_low -1.46e-01 -8.37e-02 -6.58e-02 -1.09e-01 -2.43e-01 -2.60e-01 ph/cm2/s
90%_error_hi 1.56e-01 8.26e-02 6.44e-02 1.38e-01 2.44e-01 2.60e-01 ph/cm2/s
Fluence CPL 5.33e-07 9.15e-07 1.22e-06 3.47e-06 3.57e-06 5.87e-06 erg/cm2
90%_error_low N/A -5.65e-08 -8.12e-08 -8.58e-07 -2.23e-07 -6.52e-07 erg/cm2
90%_error_hi N/A 6.32e-08 9.28e-08 3.49e-08 2.02e-07 5.42e-07 erg/cm2
Peak flux CPL 6.10e-01 5.39e-01 3.32e-01 3.12e-01 1.62e+00 1.84e+00 ph/cm2/s
90%_error_low N/A N/A N/A N/A -2.44e-01 -3.78e-01 ph/cm2/s
90%_error_hi N/A N/A N/A N/A 2.44e-01 2.46e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 336.6496 5.0273 0.0053 45.5732 -169.4404 5.8297083 36.063 TRIG_00100970 Foreground time interval of the image: -2.736 70.700 (delta_t = 73.436 [sec]) Background time interval of the image: -299.472 -2.736 (delta_t = 296.736 [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 -2.736 sec. to 70.700 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.58832 ( -0.0787919 0.0787535 ) Norm@50keV : 5.17769E-03 ( -0.000214594 0.000214501 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.60 using 59 PHA bins. # Reduced chi-squared = 1.116 for 57 degrees of freedom # Null hypothesis probability = 2.553776e-01 Photon flux (15-150 keV) in 73.44 sec: 0.662994 ( -0.030646 0.030778 ) ph/cm2/s Energy fluence (15-150 keV) : 3.56174e-06 ( -1.54035e-07 1.544e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.736 sec. to 70.700 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.58558 ( -0.0797529 0.146019 ) Epeak [keV] : 9999.36 ( -9999.36 -9999.36 ) Norm@50keV : 5.19054E-03 ( -0.000215071 0.000981749 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.63 using 59 PHA bins. # Reduced chi-squared = 1.136 for 56 degrees of freedom # Null hypothesis probability = 2.258059e-01 Photon flux (15-150 keV) in 73.44 sec: 0.662907 ( -0.030653 0.030782 ) ph/cm2/s Energy fluence (15-150 keV) : 3.57431e-06 ( -2.22552e-07 2.01783e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 22.028 sec. to 23.028 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.70232 ( -0.267409 0.25856 ) Norm@50keV : 1.21977E-02 ( -0.00187253 0.00184137 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.07 using 59 PHA bins. # Reduced chi-squared = 0.8433 for 57 degrees of freedom # Null hypothesis probability = 7.942636e-01 Photon flux (15-150 keV) in 1 sec: 1.62138 ( -0.24323 0.24445 ) ph/cm2/s Energy fluence (15-150 keV) : 1.12933e-07 ( -1.79338e-08 1.80545e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 22.028 sec. to 23.028 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.70717 ( -0.264282 0.265099 ) Epeak [keV] : 9999.27 ( -9999.35 -9999.36 ) Norm@50keV : 1.21775E-02 ( -0.00187313 0.0152151 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.07 using 59 PHA bins. # Reduced chi-squared = 0.8585 for 56 degrees of freedom # Null hypothesis probability = 7.653809e-01 Photon flux (15-150 keV) in 1 sec: 1.62136 ( -0.24373 0.24421 ) ph/cm2/s Energy fluence (15-150 keV) : 8.26095e-08 ( -2.51066e-08 1.55789e-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 = -1.002932845507641E+00, IMY = 1.869627766153752E-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: -299.472000 -2.736000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4278 35.3371 1.1 36.5 -8.5 2.4872 10.6 1.5 Her X-1 288.9045 11.0692 4.7 26.0 -87.7 0.6259 2.5 9.7 GRS 1915+105 299.5891 35.2019 0.3 0.0 -173.6 7.3392 42.1 0.1 Cyg X-1 308.0488 40.9555 1.2 8.8 114.4 1.7059 9.5 2.8 Cyg X-3 326.0411 38.4291 5.3 21.4 141.3 0.4447 2.2 8.9 Cyg X-2 352.5816 53.7612 2.7 40.9 113.9 3.0892 4.4 ------ UNKNOWN 238.8738 55.2426 2.8 45.4 23.5 1.7006 4.2 ------ UNKNOWN 245.1100 27.6905 2.5 46.5 -15.6 1.5248 4.6 ------ UNKNOWN 269.1387 11.9819 2.3 36.0 -54.8 1.4170 4.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -2.736000 70.700000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.2945 35.2148 4.0 36.7 -8.7 -0.3577 -2.9 11.1 Her X-1 288.9571 10.9910 24.3 26.1 -87.9 -0.0578 -0.5 9.7 GRS 1915+105 299.5671 35.1501 4.4 0.1 -99.2 0.2265 2.6 3.3 Cyg X-1 308.1317 40.9570 1040.3 8.8 114.7 0.0010 0.0 1.0 Cyg X-3 326.1161 38.5089 7.5 21.4 141.0 -0.1539 -1.5 11.5 Cyg X-2 336.3077 44.5708 2.1 29.4 128.0 0.7199 5.5 ------ UNKNOWN 312.9670 36.3946 2.6 10.9 147.6 0.3862 4.4 ------ UNKNOWN 333.6013 20.8822 2.6 33.0 174.3 0.4952 4.5 ------ UNKNOWN 342.9183 6.1677 2.0 49.2 -176.5 1.1387 5.7 ------ UNKNOWN 336.6496 5.0273 0.3 45.6 -169.4 5.8294 36.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: -299.472000 302.601300 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4364 35.3609 1.0 36.5 -8.5 4.5508 11.0 1.5 Her X-1 288.9138 11.0663 3.9 26.0 -87.7 1.2570 3.0 9.9 GRS 1915+105 299.5888 35.2001 0.2 0.0 -159.7 15.4375 52.4 0.1 Cyg X-1 308.0990 40.9499 0.9 8.8 114.6 3.6541 12.2 0.5 Cyg X-3 326.1398 38.3613 3.7 21.4 141.4 1.0158 3.1 2.8 Cyg X-2 276.2867 65.5462 2.7 33.3 50.4 2.0204 4.3 ------ UNKNOWN 308.1311 37.6061 1.9 7.3 136.0 1.8487 6.1 ------ UNKNOWN 344.6697 11.2783 2.7 47.3 176.8 2.7520 4.2 ------ UNKNOWN 336.6689 5.0418 0.9 45.6 -169.5 6.7335 12.6 ------ UNKNOWN 288.5513 9.8278 2.0 27.3 -87.9 2.5169 5.7 ------ UNKNOWN 269.1397 11.9665 2.4 36.0 -54.8 2.4347 4.8 ------ UNKNOWN