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 13 20:13:51 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger504779
======================================================================
Trigger: 00504779 Segment: 000
BAT Trigger Time: 339494721.664 [s; MET]
Trigger Stop: 339494729.856 [s; MET]
UTC: 2011-10-05T08:05:14.229140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 223.284218827626 Dec: -19.7304560018663 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.29
Image Trigger?: NO
Rate S/N Ratio: 10 [ if not an image trigger ]
Image S/N Ratio: 7.29
Analysis Position: [ source = BAT ]
RA: 223.284218827626 Dec: -19.7304560018663 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 223.310807053674 Dec: -19.724082888385 [deg; J2000]
{ 14h 53m 14.6s , -19d 43' 26.7" }
+/- 2.16469552698782 [arcmin] (estimated 90% radius based on SNR)
+/- 1.04728994273561 [arcmin] (formal 1-sigma fit error)
SNR: 10.0920656286046
Angular difference between the analysis and refined position is 1.549587 arcmin
Partial Coding Fraction: 0.4257812 [ including projection effects ]
Duration
T90: 23.2119999527931 +/- 5.06102954240033
Measured from: -5.72399997711182
to: 17.4879999756813 [s; relative to TRIGTIME]
T50: 10.2879999876022 +/- 4.48241407757398
Measured from: 0.272000014781952
to: 10.5600000023842 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.772000014781952
to: 1.77200001478195 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9
to: 19.1000000238419 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.451351 0.452702 0.162016 0.026191
0.052210 0.052038 0.048756 0.053077 [error]
Peak 0.048242 0.038345 0.033300 -0.006557
0.010111 0.010197 0.009687 0.010048 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 28.100 -9.000 19.100
T90 23.212 -5.724 17.488
T50 10.288 0.272 10.560
Peak 1.000 0.772 1.772
====== 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 -2.230 -0.308 0.281 - - - 2.17e-03 -4.56e-04 4.45e-04 72.370 57
CPL -1.739 -0.301 1.742 19.661 N/A N/A 4.38e-03 N/A N/A 71.900 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 -1.944 -0.534 0.464 - - - 7.74e-03 -2.50e-03 2.32e-03 46.600 57
CPL -2.028 -0.020 1.628 16.413 N/A N/A 7.00e-03 N/A N/A 46.570 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 1.55e-07 1.83e-07 1.56e-07 2.26e-07 5.75e-07 7.21e-07 erg/cm2
90%_error_low -2.84e-08 -2.74e-08 -4.34e-08 -1.02e-07 -9.97e-08 -1.63e-07 erg/cm2
90%_error_hi 2.90e-08 2.70e-08 4.64e-08 1.50e-07 1.04e-07 2.00e-07 erg/cm2
Peak flux PL 4.89e-01 3.79e-01 1.97e-01 1.48e-01 1.13e+00 1.21e+00 ph/cm2/s
90%_error_low -1.67e-01 -8.97e-02 -8.09e-02 -9.18e-02 -2.68e-01 -2.91e-01 ph/cm2/s
90%_error_hi 1.79e-01 8.97e-02 8.29e-02 1.54e-01 2.68e-01 2.94e-01 ph/cm2/s
Fluence CPL N/A N/A N/A N/A N/A N/A erg/cm2
90%_error_low -2.84e-08 -2.74e-08 -4.34e-08 -1.02e-07 -9.97e-08 -1.63e-07 erg/cm2
90%_error_hi 2.90e-08 2.70e-08 4.64e-08 1.50e-07 1.04e-07 2.00e-07 erg/cm2
Peak flux CPL 4.95e-01 3.77e-01 1.95e-01 1.59e-01 1.13e+00 1.21e+00 ph/cm2/s
90%_error_low -2.03e-01 -8.85e-02 -7.90e-02 -9.30e-02 -2.70e-01 -3.22e-01 ph/cm2/s
90%_error_hi 1.50e-01 5.79e-02 8.48e-02 5.00e-02 2.67e-01 2.91e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 223.3108 -19.7241 0.0191 38.1802 -43.5380 1.1572308 10.092 TRIG_00504779 Foreground time interval of the image: -9.000 19.100 (delta_t = 28.100 [sec]) Background time interval of the image: -239.664 -9.000 (delta_t = 230.664 [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 -9.000 sec. to 19.100 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.22991 ( -0.307855 0.280834 ) Norm@50keV : 2.16764E-03 ( -0.000455995 0.000445367 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 72.37 using 59 PHA bins. # Reduced chi-squared = 1.270 for 57 degrees of freedom # Null hypothesis probability = 8.244209e-02 Photon flux (15-150 keV) in 28.1 sec: 0.364636 ( -0.05069 0.05069 ) ph/cm2/s Energy fluence (15-150 keV) : 5.75328e-07 ( -9.9712e-08 1.04136e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.000 sec. to 19.100 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.73865 ( -0.301181 1.74139 ) Epeak [keV] : 19.6609 ( ) Norm@50keV : 4.38192E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 71.90 using 59 PHA bins. # Reduced chi-squared = 1.284 for 56 degrees of freedom # Null hypothesis probability = 7.472815e-02 Photon flux (15-150 keV) in 28.1 sec: 0.364154 ( -0.050327 0.051144 ) 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 0.772 sec. to 1.772 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.94431 ( -0.534014 0.46406 ) Norm@50keV : 7.73783E-03 ( -0.00250112 0.00231668 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 46.60 using 59 PHA bins. # Reduced chi-squared = 0.8176 for 57 degrees of freedom # Null hypothesis probability = 8.356509e-01 Photon flux (15-150 keV) in 1 sec: 1.13202 ( -0.267976 0.26807 ) ph/cm2/s Energy fluence (15-150 keV) : 7.12082e-08 ( -2.07816e-08 2.18511e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.772 sec. to 1.772 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.02798 ( -0.0202291 1.62772 ) Epeak [keV] : 16.4133 ( ) Norm@50keV : 7.00206E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 46.57 using 59 PHA bins. # Reduced chi-squared = 0.8316 for 56 degrees of freedom # Null hypothesis probability = 8.113279e-01 Photon flux (15-150 keV) in 1 sec: 1.13364 ( -0.269892 0.26692 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 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 = 5.700477327966055E-01, IMY = 5.416741843497430E-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: -239.664000 -9.000000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.5846 -60.6217 4.6 29.8 -154.1 0.6390 2.5 7.9 Cen X-3 186.5075 -62.8260 2.1 22.0 -154.9 1.4389 5.6 5.3 GX 301-2 244.9895 -15.6370 0.4 43.3 -12.0 9.8029 26.5 0.6 Sco X-1 255.9867 -37.8443 2387.6 25.8 18.7 0.0010 0.0 0.0 4U 1700-377 256.4363 -36.4195 75.4 27.2 17.8 0.0388 0.2 0.2 GX 349+2 262.8972 -24.5687 0.0 40.3 16.3 0.4607 1.2 12.2 GX 1+4 264.6259 -44.5837 86.0 24.7 40.6 0.0373 0.1 9.5 4U 1735-44 270.4108 -25.0113 7.9 43.2 25.7 0.7541 1.5 8.0 GX 5-1 270.4371 -25.7776 3.6 42.5 26.3 1.6191 3.2 7.6 GRS 1758-258 275.9282 -30.2282 4.6 41.4 36.0 1.3329 2.5 8.3 H1820-303 263.1303 -34.0089 0.0 32.2 24.6 0.7777 2.5 12.6 GX 354-0 111.0452 -53.8029 3.0 58.3 -175.5 5.9858 3.8 ------ UNKNOWN 120.8609 -48.6194 2.9 59.0 -166.1 6.9386 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -9.000000 19.100000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.6217 -60.7374 0.0 29.8 -154.4 -0.0108 -0.1 11.3 Cen X-3 186.7446 -62.7017 6.5 21.9 -154.6 0.1249 1.8 4.8 GX 301-2 244.9402 -15.4732 4.4 43.5 -12.1 -0.2987 -2.7 10.3 Sco X-1 255.8958 -37.8512 7.6 25.8 18.6 -0.1170 -1.5 4.3 4U 1700-377 256.2369 -36.5338 0.0 27.1 17.6 -0.0942 -1.2 11.7 GX 349+2 263.0106 -24.7384 177.6 40.2 16.6 -0.0073 -0.1 0.4 GX 1+4 264.8656 -44.3726 4.3 25.0 40.5 0.2146 2.7 7.0 4U 1735-44 270.1459 -24.9383 3.9 43.1 25.3 0.4206 2.9 11.3 GX 5-1 270.2612 -25.6089 7.1 42.6 26.0 0.2388 1.6 8.4 GRS 1758-258 275.7489 -30.2096 0.0 41.4 35.8 0.2702 1.8 13.1 H1820-303 262.9029 -33.9481 7.4 32.1 24.2 -0.1483 -1.6 8.0 GX 354-0 223.3108 -19.7241 1.1 38.2 -43.5 1.1572 10.1 ------ UNKNOWN 176.5594 -33.4647 2.7 43.2 -112.6 1.1997 4.2 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: -239.664000 962.409800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.3990 -60.6859 3.6 29.9 -154.3 2.7954 3.2 4.5 Cen X-3 186.5820 -62.8087 1.6 22.0 -154.9 6.4255 7.1 3.1 GX 301-2 244.9881 -15.6383 0.3 43.3 -12.0 48.1737 37.8 0.5 Sco X-1 256.1170 -38.0256 0.0 25.7 19.2 1.8952 2.2 12.5 4U 1700-377 256.4360 -36.4192 11.3 27.2 17.8 0.9148 1.0 0.2 GX 349+2 263.1291 -24.7699 16.9 40.2 16.8 -0.8545 -0.7 6.7 GX 1+4 264.7228 -44.5268 7.3 24.8 40.6 1.6172 1.6 4.7 4U 1735-44 270.3846 -25.0465 9.4 43.1 25.7 2.0539 1.2 5.8 GX 5-1 270.4353 -25.7674 2.3 42.5 26.3 7.9435 4.9 7.3 GRS 1758-258 275.8712 -30.2223 5.2 41.4 35.9 3.9928 2.2 9.1 H1820-303 262.9872 -33.8587 17.7 32.3 24.2 0.6738 0.7 1.4 GX 354-0 259.0499 -36.8240 2.5 28.0 22.1 4.0354 4.6 ------ UNKNOWN 260.9477 -7.6031 2.4 55.3 5.1 18.7592 4.7 ------ UNKNOWN 110.9747 -53.8403 4.6 58.3 -175.5 15.6440 2.5 ------ UNKNOWN 120.7813 -48.6394 3.2 59.1 -166.2 26.4519 3.6 ------ UNKNOWN 230.1477 -3.0230 2.9 54.5 -33.0 19.0423 4.0 ------ UNKNOWN 221.0080 -7.4099 3.3 50.7 -44.8 14.7335 3.5 ------ UNKNOWN