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 15:56:59 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger434360
======================================================================
Trigger: 00434360 Segment: 000
BAT Trigger Time: 306392611.968 [s; MET]
Trigger Stop: 306392616.064 [s; MET]
UTC: 2010-09-17T05:03:25.783360 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 289.264654463964 Dec: -17.1044750247871 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.15
Image Trigger?: NO
Rate S/N Ratio: 7.87400787401181 [ if not an image trigger ]
Image S/N Ratio: 7.15
Analysis Position: [ source = BAT ]
RA: 289.264654463964 Dec: -17.1044750247871 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 289.245015480821 Dec: -17.1145190496547 [deg; J2000]
{ 19h 16m 58.8s , -17d 06' 52.3" }
+/- 2.02941237603008 [arcmin] (estimated 90% radius based on SNR)
+/- 0.85007181876365 [arcmin] (formal 1-sigma fit error)
SNR: 11.066695103936
Angular difference between the analysis and refined position is 1.277295 arcmin
Partial Coding Fraction: 0.625 [ including projection effects ]
Duration
T90: 63.8159999251366 +/- 21.5559585471355
Measured from: -0.755999982357025
to: 63.0599999427795 [s; relative to TRIGTIME]
T50: 19.095999956131 +/- 8.08033788468745
Measured from: 4.66000002622604
to: 23.755999982357 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 3.22000002861023
to: 4.22000002861023 [s; relative to TRIGTIME]
Total Fluence
Measured from: -2.21200001239777
to: 66.2239999771118 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.492077 0.472441 0.381378 0.085281
0.055022 0.055659 0.048648 0.042845 [error]
Peak 0.014026 0.031949 0.018047 0.016462
0.006982 0.007115 0.006355 0.005415 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 68.436 -2.212 66.224
T90 63.816 -0.756 63.060
T50 19.096 4.660 23.756
Peak 1.000 3.220 4.220
====== 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 -1.614 -0.223 0.218 - - - 1.33e-03 -1.66e-04 1.63e-04 69.190 57
CPL -1.622 -0.216 0.228 9999.340 -9999.340 -9999.340 1.33e-03 -1.33e-03 6.99e-04 69.210 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 -1.661 -0.596 0.556 - - - 4.65e-03 -1.55e-03 1.42e-03 67.170 57
CPL -1.693 N/A N/A 9999.360 N/A N/A 4.56e-03 N/A N/A 67.190 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 1.30e-07 2.22e-07 2.90e-07 7.69e-07 8.52e-07 1.41e-06 erg/cm2
90%_error_low -2.46e-08 -2.57e-08 -4.97e-08 -2.49e-07 -1.14e-07 -2.95e-07 erg/cm2
90%_error_hi 2.56e-08 2.56e-08 4.94e-08 3.21e-07 1.16e-07 3.53e-07 erg/cm2
Peak flux PL 2.24e-01 2.05e-01 1.29e-01 1.25e-01 6.10e-01 6.83e-01 ph/cm2/s
90%_error_low -9.82e-02 -5.74e-02 -5.54e-02 -8.17e-02 -1.67e-01 -1.92e-01 ph/cm2/s
90%_error_hi 1.06e-01 5.65e-02 5.44e-02 1.47e-01 1.67e-01 1.97e-01 ph/cm2/s
Fluence CPL 1.31e-07 1.66e-07 2.87e-07 8.69e-07 8.60e-07 1.40e-06 erg/cm2
90%_error_low -2.65e-08 -4.01e-08 -4.63e-08 -4.84e-07 -1.22e-07 -3.84e-07 erg/cm2
90%_error_hi 2.47e-08 3.10e-08 5.28e-08 4.16e-08 1.08e-07 3.44e-07 erg/cm2
Peak flux CPL 1.97e-01 1.46e-01 7.50e-02 6.55e-02 4.45e-01 4.83e-01 ph/cm2/s
90%_error_low N/A -8.98e-02 -4.50e-02 -2.10e-02 -2.71e-01 -2.96e-01 ph/cm2/s
90%_error_hi N/A 9.32e-02 2.94e-02 3.29e-02 2.60e-01 2.76e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 289.2450 -17.1145 0.0174 24.5648 -106.0921 1.3105564 11.067 TRIG_00434360 Foreground time interval of the image: -2.212 66.224 (delta_t = 68.436 [sec]) Background time interval of the image: -235.867 -2.212 (delta_t = 233.655 [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 -2.212 sec. to 66.224 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.61438 ( -0.223454 0.218264 ) Norm@50keV : 1.33349E-03 ( -0.000166006 0.000162573 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 69.19 using 59 PHA bins. # Reduced chi-squared = 1.214 for 57 degrees of freedom # Null hypothesis probability = 1.290772e-01 Photon flux (15-150 keV) in 68.44 sec: 0.172137 ( -0.019718 0.019751 ) ph/cm2/s Energy fluence (15-150 keV) : 8.52181e-07 ( -1.14124e-07 1.15874e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -2.212 sec. to 66.224 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.6216 ( -0.216656 0.22761 ) Epeak [keV] : 9999.34 ( -9999.36 -9999.36 ) Norm@50keV : 1.33341E-03 ( -0.00133396 0.000698709 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 69.21 using 59 PHA bins. # Reduced chi-squared = 1.236 for 56 degrees of freedom # Null hypothesis probability = 1.105798e-01 Photon flux (15-150 keV) in 68.44 sec: 0.172143 ( -0.019748 0.019726 ) ph/cm2/s Energy fluence (15-150 keV) : 8.59723e-07 ( -1.22057e-07 1.07998e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 3.220 sec. to 4.220 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.66119 ( -0.595394 0.556308 ) Norm@50keV : 4.65190E-03 ( -0.00154892 0.00142265 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 67.17 using 59 PHA bins. # Reduced chi-squared = 1.178 for 57 degrees of freedom # Null hypothesis probability = 1.678871e-01 Photon flux (15-150 keV) in 1 sec: 0.609710 ( -0.167275 0.167349 ) ph/cm2/s Energy fluence (15-150 keV) : 4.32205e-08 ( -1.44299e-08 1.51106e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.220 sec. to 4.220 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.69304 ( ) Epeak [keV] : 9999.36 ( ) Norm@50keV : 4.56002E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 67.19 using 59 PHA bins. # Reduced chi-squared = 1.200 for 56 degrees of freedom # Null hypothesis probability = 1.455091e-01 Photon flux (15-150 keV) in 1 sec: 0.444507 ( -0.271184 0.260128 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 63.816 sec. Hardness ratio (energy fluence ratio) = 1.30644121065
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 3.520942e-07 S(50-150 keV) = 5.000722e-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 = -1.266979308608149E-01, IMY = 4.391831519623013E-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: -235.867400 -2.212000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 274.0272 -14.0136 4.3 37.7 -92.0 1.7341 2.7 1.9 GX 17+2 276.0136 -30.3329 19.8 41.5 -117.2 0.3574 0.6 5.0 H1820-303 285.2240 -25.0449 0.0 31.8 -116.8 0.2127 0.8 12.7 HT1900.1-2455 288.7660 10.9472 0.7 27.9 -40.0 3.4055 16.6 1.9 GRS 1915+105 299.5792 35.2159 1.1 42.3 -0.7 3.4038 10.9 1.0 Cyg X-1 308.1339 40.9763 2.4 46.6 10.4 1.8993 4.8 1.8 Cyg X-3 326.2122 38.3019 6.8 46.0 30.0 -0.8405 -1.7 2.2 Cyg X-2 336.5629 -12.4908 2.8 25.8 121.1 1.0725 4.2 ------ UNKNOWN 324.4043 -8.7494 2.6 13.3 118.4 0.8089 4.5 ------ UNKNOWN 290.9330 -14.5350 2.2 22.0 -101.8 1.0128 5.3 ------ UNKNOWN 284.3918 -58.4227 3.1 56.8 -149.7 4.6069 3.8 ------ UNKNOWN 279.6944 -52.0846 2.7 53.4 -142.5 4.7737 4.3 ------ UNKNOWN 267.8220 12.6174 2.6 47.0 -53.2 3.5916 4.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -2.212000 66.224000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 273.9195 -14.1654 9.3 37.9 -92.2 -0.3408 -1.2 9.2 GX 17+2 275.8492 -30.4828 6.1 41.7 -117.3 0.5206 1.9 8.0 H1820-303 285.0344 -24.9185 284.8 31.8 -116.4 0.0059 0.0 0.1 HT1900.1-2455 288.9059 11.1312 0.0 27.9 -39.5 0.2790 2.6 12.8 GRS 1915+105 299.4669 35.3274 5.3 42.4 -0.7 -0.3202 -2.2 9.7 Cyg X-1 308.2100 41.0543 15.5 46.7 10.4 0.1643 0.7 7.6 Cyg X-3 326.1773 38.2934 22.6 46.0 29.9 0.1293 0.5 1.7 Cyg X-2 289.2450 -17.1145 1.0 24.6 -106.1 1.3100 11.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 406.132600 962.118400 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 326.1441 38.3176 3.1 53.9 170.9 4.7857 3.7 1.3 Cyg X-2 5.3317 10.4421 2.2 24.3 112.4 1.8464 5.2 ------ UNKNOWN 335.1627 42.4695 2.9 47.3 176.7 2.5543 3.9 ------ UNKNOWN 47.7265 -0.5283 3.1 30.6 5.8 1.2874 3.7 ------ UNKNOWN 1.6085 65.9790 2.9 46.3 -145.0 2.8900 4.0 ------ UNKNOWN 78.7970 24.0798 5.7 47.0 -53.3 3.2475 2.1 ------ UNKNOWN 70.9249 42.3792 2.7 41.1 -80.0 6.1181 4.3 ------ UNKNOWN 30.6569 70.8547 2.7 48.2 -129.4 6.1898 4.3 ------ UNKNOWN