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: Fri Jan 17 20:18:56 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger382399
======================================================================
Trigger: 00382399 Segment: 000
BAT Trigger Time: 284875974.464 [s; MET]
Trigger Stop: 284875974.976 [s; MET]
UTC: 2010-01-11T04:12:49.036100 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 247.038118029266 Dec: 15.5569602813662 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 12.08
Image Trigger?: NO
Rate S/N Ratio: 18.1107702762748 [ if not an image trigger ]
Image S/N Ratio: 12.08
Analysis Position: [ source = BAT ]
RA: 247.038118029266 Dec: 15.5569602813662 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 247.02890122076 Dec: 15.5426809549622 [deg; J2000]
{ 16h 28m 06.9s , +15d 32' 33.7" }
+/- 1.25716852205968 [arcmin] (estimated 90% radius based on SNR)
+/- 0.426029092349492 [arcmin] (formal 1-sigma fit error)
SNR: 21.9344964190425
Angular difference between the analysis and refined position is 1.008899 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 14 +/- 2.23606797749979
Measured from: -7.46399998664856
to: 6.53600001335144 [s; relative to TRIGTIME]
T50: 4 +/- 2.23606797749979
Measured from: -1.46399998664856
to: 2.53600001335144 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.53600001335144
to: 1.53600001335144 [s; relative to TRIGTIME]
Total Fluence
Measured from: -9.46399998664856
to: 8.53600001335144 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.387662 0.474853 0.268634 0.038031
0.025821 0.025744 0.024121 0.024279 [error]
Peak 0.065453 0.090880 0.053896 0.009022
0.006732 0.007002 0.006513 0.006003 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 18.000 -9.464 8.536
T90 14.000 -7.464 6.536
T50 4.000 -1.464 2.536
Peak 1.000 0.536 1.536
====== 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 -1.745 -0.132 0.130 - - - 4.07e-03 -3.10e-04 3.06e-04 55.390 57
CPL -1.707 -0.559 0.525 340.969 N/A N/A 4.28e-03 N/A N/A 55.380 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 -1.584 -0.170 0.166 - - - 1.41e-02 -1.44e-03 1.42e-03 49.210 57
CPL -1.366 -0.322 0.726 129.772 -129.772 -129.772 1.86e-02 -7.26e-03 2.79e-02 48.870 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 1.18e-07 1.87e-07 2.23e-07 5.17e-07 6.77e-07 1.04e-06 erg/cm2
90%_error_low -1.25e-08 -1.23e-08 -2.37e-08 -1.07e-07 -5.36e-08 -1.30e-07 erg/cm2
90%_error_hi 1.29e-08 1.23e-08 2.39e-08 1.26e-07 5.44e-08 1.45e-07 erg/cm2
Peak flux PL 6.29e-01 6.02e-01 4.01e-01 4.17e-01 1.80e+00 2.05e+00 ph/cm2/s
90%_error_low -9.20e-02 -5.63e-02 -5.35e-02 -1.02e-01 -1.65e-01 -1.95e-01 ph/cm2/s
90%_error_hi 9.52e-02 5.62e-02 5.36e-02 1.22e-01 1.66e-01 1.98e-01 ph/cm2/s
Fluence CPL 1.17e-07 1.87e-07 2.23e-07 4.81e-07 6.74e-07 1.01e-06 erg/cm2
90%_error_low -1.43e-08 -1.30e-08 -2.42e-08 N/A -6.85e-08 -3.00e-07 erg/cm2
90%_error_hi 8.95e-09 1.58e-08 2.40e-08 N/A 5.69e-08 1.75e-07 erg/cm2
Peak flux CPL 6.12e-01 6.17e-01 4.03e-01 3.02e-01 1.78e+00 1.94e+00 ph/cm2/s
90%_error_low -1.04e-01 -6.77e-02 -5.56e-02 -1.81e-01 -1.75e-01 -2.63e-01 ph/cm2/s
90%_error_hi 1.05e-01 7.36e-02 5.60e-02 1.45e-01 1.74e-01 2.92e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 247.0289 15.5427 0.0088 16.0596 -159.3538 1.1467217 21.934 TRIG_00382399 Foreground time interval of the image: -9.464 8.536 (delta_t = 18.000 [sec]) Background time interval of the image: -239.464 -9.464 (delta_t = 230.000 [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 -9.464 sec. to 8.536 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.74492 ( -0.13239 0.129898 ) Norm@50keV : 4.07430E-03 ( -0.000310386 0.000306276 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.39 using 59 PHA bins. # Reduced chi-squared = 0.9718 for 57 degrees of freedom # Null hypothesis probability = 5.355467e-01 Photon flux (15-150 keV) in 18 sec: 0.549911 ( -0.036421 0.03646 ) ph/cm2/s Energy fluence (15-150 keV) : 6.77021e-07 ( -5.35558e-08 5.44419e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -9.464 sec. to 8.536 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.70696 ( -0.558431 0.526157 ) Epeak [keV] : 340.969 ( ) Norm@50keV : 4.27515E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.38 using 59 PHA bins. # Reduced chi-squared = 0.9889 for 56 degrees of freedom # Null hypothesis probability = 4.983932e-01 Photon flux (15-150 keV) in 18 sec: 0.548652 ( -0.039873 0.037414 ) ph/cm2/s Energy fluence (15-150 keV) : 6.73693e-07 ( -6.84882e-08 5.68948e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.536 sec. to 1.536 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.58441 ( -0.16951 0.166413 ) Norm@50keV : 1.40874E-02 ( -0.00143593 0.00141652 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.21 using 59 PHA bins. # Reduced chi-squared = 0.8633 for 57 degrees of freedom # Null hypothesis probability = 7.588303e-01 Photon flux (15-150 keV) in 1 sec: 1.80171 ( -0.16546 0.16551 ) ph/cm2/s Energy fluence (15-150 keV) : 1.3202e-07 ( -1.46141e-08 1.49098e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.536 sec. to 1.536 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.36554 ( -0.321986 0.725865 ) Epeak [keV] : 129.772 ( -129.796 -129.796 ) Norm@50keV : 1.86123E-02 ( -0.00725441 0.027866 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 48.87 using 59 PHA bins. # Reduced chi-squared = 0.8726 for 56 degrees of freedom # Null hypothesis probability = 7.393018e-01 Photon flux (15-150 keV) in 1 sec: 1.78304 ( -0.17466 0.17365 ) ph/cm2/s Energy fluence (15-150 keV) : 1.28455e-07 ( -1.78945e-08 1.74735e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 14.0 sec. Hardness ratio (energy fluence ratio) = 1.19343837154
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 3.045301e-07 S(50-150 keV) = 3.72484e-07
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 = -2.693824269417192E-01, IMY = 1.015023599969543E-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: -239.464000 -9.464000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9820 -15.6339 0.4 26.1 -65.4 8.9686 30.5 0.4 Sco X-1 254.4534 35.3263 8.3 34.2 174.4 0.4351 1.4 1.0 Her X-1 268.3707 -1.4173 6.4 36.5 -115.3 0.8524 1.8 2.1 SW J1753.5-0127 213.2346 39.3218 3.3 36.4 116.1 2.0327 3.5 ------ UNKNOWN 261.6320 54.9962 2.9 52.8 162.3 4.0836 4.1 ------ UNKNOWN 256.8271 -19.6603 3.0 36.0 -78.6 1.9418 3.9 ------ UNKNOWN 262.5379 -15.3096 2.4 37.2 -90.2 3.0587 4.9 ------ UNKNOWN 270.9866 -9.8699 2.3 41.8 -104.0 4.9854 5.1 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -9.464000 8.536000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.1677 -15.5986 5.8 26.1 -65.8 0.1395 2.0 11.2 Sco X-1 254.2688 35.2849 6.8 34.0 174.2 0.1213 1.7 9.9 Her X-1 268.2504 -1.3675 11.6 36.4 -115.3 -0.1023 -1.0 8.7 SW J1753.5-0127 198.8071 12.4915 2.2 33.9 63.3 0.5260 5.2 ------ UNKNOWN 247.0289 15.5427 0.5 16.1 -159.4 1.1467 21.9 ------ UNKNOWN 274.9814 21.5880 2.1 43.0 -151.8 0.5028 5.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 47.236600 962.588500 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9766 -15.6376 0.2 31.3 -34.8 32.0482 46.5 0.2 Sco X-1 254.7089 35.3538 35.2 21.0 159.1 -0.2192 -0.3 12.3 Her X-1 263.0536 -24.8940 202.3 43.4 -60.0 -0.1324 -0.1 9.2 GX 1+4 268.3929 -1.5251 3.4 27.2 -91.6 2.8021 3.4 4.6 SW J1753.5-0127 274.1525 -13.9979 3.8 39.9 -82.2 7.5205 3.0 8.8 GX 17+2 288.7892 10.9751 2.0 40.8 -127.5 7.7399 5.9 1.8 GRS 1915+105 299.5909 35.1968 0.6 50.7 -161.7 31.6408 20.1 0.3 Cyg X-1 307.9733 40.8522 8.1 58.0 -167.4 4.6786 1.6 8.7 Cyg X-3 213.9222 44.1664 7.2 40.0 103.8 4.5587 1.6 ------ UNKNOWN 205.4097 6.0197 4.9 41.9 42.9 4.7318 2.4 ------ UNKNOWN 297.9000 34.7916 3.0 49.3 -161.5 5.2671 3.9 ------ UNKNOWN 237.0392 -29.8797 3.7 46.4 -26.7 3.7905 3.1 ------ UNKNOWN 296.0178 13.1376 2.7 47.4 -132.3 9.7768 4.3 ------ UNKNOWN 268.0451 -22.3333 1.3 43.1 -67.7 28.2532 8.8 ------ UNKNOWN 282.0096 -6.8690 2.9 41.3 -98.3 9.4750 4.0 ------ UNKNOWN