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: Mon Jan 20 06:44:27 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger293707
======================================================================
Trigger: 00293707 Segment: 000
BAT Trigger Time: 213680475.136 [s; MET]
Trigger Stop: 213680479.232 [s; MET]
UTC: 2007-10-10T03:41:12.855120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 288.100630766172 Dec: -32.3786069237812 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.17
Image Trigger?: NO
Rate S/N Ratio: 9.1104335791443 [ if not an image trigger ]
Image S/N Ratio: 7.17
Analysis Position: [ source = BAT ]
RA: 288.100630766172 Dec: -32.3786069237812 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 288.042417503405 Dec: -32.3838763787873 [deg; J2000]
{ 19h 12m 10.2s , -32d 23' 02.0" }
+/- 2.50674241819008 [arcmin] (estimated 90% radius based on SNR)
+/- 0.956013726506567 [arcmin] (formal 1-sigma fit error)
SNR: 8.18392519995838
Angular difference between the analysis and refined position is 2.966574 arcmin
Partial Coding Fraction: 0.4296875 [ including projection effects ]
Duration
T90: 6.32400000095367 +/- 1.86554119492639
Measured from: -0.904000014066696
to: 5.41999998688698 [s; relative to TRIGTIME]
T50: 2.70800000429153 +/- 1.57969618105291
Measured from: 0.859999984502792
to: 3.56799998879433 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.803999990224838
to: 1.80399999022484 [s; relative to TRIGTIME]
Total Fluence
Measured from: -1.14399999380112
to: 5.8759999871254 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.143275 0.149767 0.071647 -0.016126
0.023874 0.024170 0.021141 0.018948 [error]
Peak 0.040175 0.026281 0.020976 0.004316
0.009044 0.009223 0.008179 0.007286 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 7.020 -1.144 5.876
T90 6.324 -0.904 5.420
T50 2.708 0.860 3.568
Peak 1.000 0.804 1.804
====== 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 -2.238 -0.366 0.320 - - - 3.05e-03 -7.78e-04 7.55e-04 48.070 57
CPL -0.616 -1.370 1.884 36.404 N/A N/A 2.56e-02 N/A N/A 43.770 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 -2.505 -0.934 0.629 - - - 4.52e-03 -4.52e-03 2.29e-03 50.710 57
CPL -1.984 N/A N/A 1.571 N/A N/A 8.48e-03 N/A N/A 51.200 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 5.49e-08 6.46e-08 5.48e-08 7.88e-08 2.02e-07 2.53e-07 erg/cm2
90%_error_low -1.27e-08 -1.24e-08 -1.79e-08 -4.04e-08 -4.34e-08 -6.80e-08 erg/cm2
90%_error_hi 1.31e-08 1.23e-08 1.90e-08 6.06e-08 4.49e-08 8.23e-08 erg/cm2
Peak flux PL 4.94e-01 2.76e-01 9.73e-02 4.49e-02 8.91e-01 9.12e-01 ph/cm2/s
90%_error_low -1.79e-01 -1.00e-01 -6.33e-02 -4.49e-02 -2.52e-01 -2.60e-01 ph/cm2/s
90%_error_hi 1.88e-01 8.73e-02 7.19e-02 8.33e-02 2.52e-01 2.62e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -1.27e-08 -1.24e-08 -1.79e-08 -4.04e-08 -4.34e-08 -6.80e-08 erg/cm2
90%_error_hi 1.31e-08 1.23e-08 1.90e-08 6.06e-08 4.49e-08 8.23e-08 erg/cm2
Peak flux CPL 4.57e-01 2.91e-01 8.99e-02 2.19e-02 8.75e-01 8.82e-01 ph/cm2/s
90%_error_low -1.58e-01 -8.74e-02 N/A -2.19e-02 -2.48e-01 N/A ph/cm2/s
90%_error_hi 1.78e-01 8.60e-02 N/A 1.21e-01 2.49e-01 N/A ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 288.0424 -32.3839 0.0235 45.2507 -167.6347 0.3727602 8.184 TRIG_00293707 Foreground time interval of the image: -1.144 5.876 (delta_t = 7.020 [sec]) Background time interval of the image: -239.136 -1.144 (delta_t = 237.992 [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 -1.144 sec. to 5.876 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.23792 ( -0.365738 0.319724 ) Norm@50keV : 3.04935E-03 ( -0.000777621 0.000755673 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.07 using 59 PHA bins. # Reduced chi-squared = 0.8434 for 57 degrees of freedom # Null hypothesis probability = 7.941128e-01 Photon flux (15-150 keV) in 7.02 sec: 0.515166 ( -0.094507 0.094533 ) ph/cm2/s Energy fluence (15-150 keV) : 2.02436e-07 ( -4.34065e-08 4.49001e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -1.144 sec. to 5.876 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.615983 ( -1.37155 1.88298 ) Epeak [keV] : 36.4037 ( ) Norm@50keV : 2.55633E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.77 using 59 PHA bins. # Reduced chi-squared = 0.7816 for 56 degrees of freedom # Null hypothesis probability = 8.825940e-01 Photon flux (15-150 keV) in 7.02 sec: ( ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.804 sec. to 1.804 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.50512 ( -0.933876 0.629267 ) Norm@50keV : 4.52192E-03 ( -0.00452143 0.00229276 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 50.71 using 59 PHA bins. # Reduced chi-squared = 0.8896 for 57 degrees of freedom # Null hypothesis probability = 7.086226e-01 Photon flux (15-150 keV) in 1 sec: 0.891228 ( -0.251551 0.251592 ) ph/cm2/s Energy fluence (15-150 keV) : 4.52887e-08 ( -1.66871e-08 1.79714e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.804 sec. to 1.804 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.98353 ( ) Epeak [keV] : 1.57123 ( ) Norm@50keV : 8.48429E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.20 using 59 PHA bins. # Reduced chi-squared = 0.9143 for 56 degrees of freedom # Null hypothesis probability = 6.567138e-01 Photon flux (15-150 keV) in 1 sec: 0.875322 ( -0.248179 0.249468 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 6.324 sec. Hardness ratio (energy fluence ratio) = 0.847949472232
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.195503e-07 S(50-150 keV) = 8.289208e-08
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 = -9.853890630636623E-01, IMY = 2.160253970975944E-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: -239.136000 -1.144000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 268.3569 -1.4160 7.1 35.5 -112.4 0.6374 1.6 2.3 SW J1753.5-0127 270.3663 -25.0940 12.5 47.3 -144.1 0.4450 0.9 4.6 GX 5-1 270.4444 -25.9213 7.4 47.9 -144.9 -0.7519 -1.6 13.2 GRS 1758-258 274.0465 -14.0266 3.6 37.2 -135.6 1.0382 3.2 2.4 GX 17+2 275.8663 -30.4929 29.7 48.4 -153.8 -0.1744 -0.4 8.1 H1820-303 284.9065 -24.7494 0.0 39.3 -159.4 -0.3103 -1.0 12.5 HT1900.1-2455 288.7947 10.9411 1.2 12.9 -92.7 1.8939 9.7 0.3 GRS 1915+105 299.5868 35.2050 0.2 24.4 -8.7 9.9637 46.6 0.3 Cyg X-1 308.1666 40.9439 1.2 30.6 5.2 2.0985 9.7 2.6 Cyg X-3 326.1445 38.3161 19.8 35.0 30.1 0.1659 0.6 1.3 Cyg X-2 308.0793 37.6213 0.9 27.3 6.6 2.7204 13.3 ------ UNKNOWN 277.6361 58.2679 2.1 50.8 -20.3 2.5887 5.6 ------ UNKNOWN 257.9729 36.6173 3.3 47.1 -53.6 3.4566 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -1.144000 5.876000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 268.3289 -1.5247 8.9 35.6 -112.5 -0.0694 -1.3 4.9 SW J1753.5-0127 270.3487 -24.9942 7.5 47.3 -144.0 0.0978 1.5 6.2 GX 5-1 270.1683 -25.7184 6.0 47.9 -144.5 -0.1258 -1.9 7.4 GRS 1758-258 273.9862 -14.1713 23.4 37.3 -135.7 -0.0194 -0.5 8.2 GX 17+2 275.8672 -30.2561 7.9 48.2 -153.6 -0.0872 -1.5 7.3 H1820-303 285.0308 -25.0528 6.9 39.5 -159.8 -0.0595 -1.7 7.9 HT1900.1-2455 288.6415 10.8040 0.0 13.0 -93.3 0.0529 2.0 12.5 GRS 1915+105 299.4941 35.0552 9.1 24.3 -8.9 0.0320 1.3 10.0 Cyg X-1 308.2697 40.8640 5.3 30.5 5.4 -0.0676 -2.2 9.0 Cyg X-3 326.3614 38.4214 0.0 35.2 30.2 0.0457 1.1 10.7 Cyg X-2 308.1339 -44.8613 2.8 56.0 170.5 0.6081 4.0 ------ UNKNOWN 303.7701 32.2887 2.3 21.5 0.2 0.1343 5.0 ------ UNKNOWN 288.0424 -32.3839 1.4 45.3 -167.6 0.3728 8.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: