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: Sun Jan 19 18:18:51 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger346386
======================================================================
Trigger: 00346386 Segment: 000
BAT Trigger Time: 258627992 [s; MET]
Trigger Stop: 258628056 [s; MET]
UTC: 2009-03-13T09:06:27.429120 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 198.396961251434 Dec: 8.10658701409268 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.12
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.12
Analysis Position: [ source = BAT ]
RA: 198.396961251434 Dec: 8.10658701409268 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 198.400524805022 Dec: 8.0867899356897 [deg; J2000]
{ 13h 13m 36.1s , +08d 05' 12.4" }
+/- 2.14658730696382 [arcmin] (estimated 90% radius based on SNR)
+/- 0.923630156814283 [arcmin] (formal 1-sigma fit error)
SNR: 10.2139063134631
Angular difference between the analysis and refined position is 1.206539 arcmin
Partial Coding Fraction: 0.1523438 [ including projection effects ]
Duration
T90: 83.039999961853 +/- 19.4835232932372
Measured from: -16.2639999985695
to: 66.7759999632835 [s; relative to TRIGTIME]
T50: 38.9759999513626 +/- 12.0077308652368
Measured from: 1.81600001454353
to: 40.7919999659061 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.86000001430511
to: 5.86000001430511 [s; relative to TRIGTIME]
Total Fluence
Measured from: -21.2560000121593
to: 74.8079999983311 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.990800 0.895882 0.692329 0.206577
0.130682 0.130822 0.114997 0.101544 [error]
Peak 0.027280 0.035034 0.016027 0.033504
0.013906 0.013887 0.011553 0.011006 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 96.064 -21.256 74.808
T90 83.040 -16.264 66.776
T50 38.976 1.816 40.792
Peak 1.000 4.860 5.860
====== 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 -1.899 -0.288 0.269 - - - 1.71e-03 -3.01e-04 2.89e-04 57.090 57
CPL -1.903 -0.409 0.911 9999.280 N/A N/A 1.70e-03 N/A N/A 57.090 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 -1.456 -0.943 1.051 - - - 6.06e-03 -2.61e-03 2.51e-03 53.110 57
CPL -1.457 1.457 1.254 9999.330 N/A N/A 6.07e-03 N/A N/A 53.110 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 3.05e-07 4.40e-07 4.72e-07 9.42e-07 1.51e-06 2.16e-06 erg/cm2
90%_error_low -6.42e-08 -6.23e-08 -1.13e-07 -3.89e-07 -2.55e-07 -5.18e-07 erg/cm2
90%_error_hi 6.69e-08 6.22e-08 1.14e-07 5.37e-07 2.61e-07 6.32e-07 erg/cm2
Peak flux PL 2.39e-01 2.47e-01 1.80e-01 2.11e-01 7.47e-01 8.77e-01 ph/cm2/s
90%_error_low -1.82e-01 -1.40e-01 -9.97e-02 -2.11e-01 -7.47e-01 -3.63e-01 ph/cm2/s
90%_error_hi 2.31e-01 1.18e-01 8.87e-02 4.11e-01 3.38e-01 3.64e-01 ph/cm2/s
Fluence CPL 3.04e-07 4.18e-07 4.49e-07 1.05e-06 1.47e-06 2.22e-06 erg/cm2
90%_error_low -7.94e-08 -1.07e-07 -7.27e-08 -7.16e-07 -3.62e-07 -2.13e-06 erg/cm2
90%_error_hi 6.23e-08 7.60e-08 7.05e-08 1.48e-07 2.35e-07 3.32e-07 erg/cm2
Peak flux CPL 2.04e-01 1.24e-01 5.02e-02 3.30e-02 3.92e-01 4.13e-01 ph/cm2/s
90%_error_low -2.04e-01 N/A N/A N/A -3.92e-01 -4.13e-01 ph/cm2/s
90%_error_hi 2.65e-01 N/A N/A N/A 4.70e-01 5.64e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 198.4005 8.0868 0.0189 36.0053 97.4801 2.5604129 10.214 TRIG_00346386 Foreground time interval of the image: -9.699 74.808 (delta_t = 84.507 [sec]) Background time interval of the image:
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 -21.256 sec. to 74.808 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.8987 ( -0.288473 0.268844 ) Norm@50keV : 1.70815E-03 ( -0.000300979 0.000289378 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 57.09 using 59 PHA bins. # Reduced chi-squared = 1.002 for 57 degrees of freedom # Null hypothesis probability = 4.717076e-01 Photon flux (15-150 keV) in 96.06 sec: 0.245017 ( -0.034949 0.034978 ) ph/cm2/s Energy fluence (15-150 keV) : 1.50877e-06 ( -2.54896e-07 2.60661e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -21.256 sec. to 74.808 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.21168 ( -0.100588 1.21906 ) Epeak [keV] : 85.5365 ( ) Norm@50keV : 1.17979E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 57.06 using 59 PHA bins. # Reduced chi-squared = 1.019 for 56 degrees of freedom # Null hypothesis probability = 4.356268e-01 Photon flux (15-150 keV) in 96.06 sec: 0.235752 ( -0.060496 0.044192 ) ph/cm2/s Energy fluence (15-150 keV) : 1.46569e-06 ( -3.61506e-07 2.34791e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 4.860 sec. to 5.860 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.4556 ( -0.944236 1.05044 ) Norm@50keV : 6.05799E-03 ( -0.00261396 0.00250643 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.11 using 59 PHA bins. # Reduced chi-squared = 0.9318 for 57 degrees of freedom # Null hypothesis probability = 6.217629e-01 Photon flux (15-150 keV) in 1 sec: 0.747437 ( -0.747437 0.337573 ) ph/cm2/s Energy fluence (15-150 keV) : 5.79322e-08 ( -2.60814e-08 2.62383e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.860 sec. to 5.860 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.40839 ( 2.4094 2.20641 ) Epeak [keV] : 141.192 ( ) Norm@50keV : 1.93501E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.19 using 59 PHA bins. # Reduced chi-squared = 0.9320 for 56 degrees of freedom # Null hypothesis probability = 6.198031e-01 Photon flux (15-150 keV) in 1 sec: 0.392419 ( -0.392419 0.470452 ) ph/cm2/s Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 83.04 sec. Hardness ratio (energy fluence ratio) = 1.07275385431
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 7.449863e-07 S(50-150 keV) = 7.637823e-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 = -9.460073011165211E-02, IMY = -7.205011896212690E-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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -9.699400 74.808000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9848 -15.6623 0.5 16.1 -72.7 2.4355 25.5 1.4 Sco X-1 254.5196 35.3298 3.8 47.7 -170.8 0.5450 3.0 3.1 Her X-1 255.9784 -37.8462 1.9 38.2 -49.0 1.0140 6.1 0.4 4U 1700-377 256.3917 -36.4851 3.6 37.4 -51.0 0.4987 3.2 4.3 GX 349+2 262.8197 -24.8588 0.0 35.1 -72.5 -0.1570 -0.9 12.3 GX 1+4 264.5482 -44.4742 4.8 47.4 -48.9 0.9393 2.4 8.5 4U 1735-44 268.4271 -1.4664 4.8 37.5 -113.4 0.4974 2.4 3.6 SW J1753.5-0127 270.0996 -25.1912 0.0 41.3 -76.0 0.3636 0.9 12.1 GX 5-1 270.2513 -25.7777 10.8 41.7 -75.2 0.4343 1.1 3.5 GRS 1758-258 262.9125 -33.7351 3.1 39.7 -59.9 0.8030 3.8 7.1 GX 354-0 198.4005 8.0868 1.1 36.0 97.5 2.5608 10.2 ------ UNKNOWN 272.1389 -14.6201 2.6 40.9 -92.4 1.7715 4.4 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 819.400600 963.050000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9620 -15.6517 0.5 25.7 99.1 4.9699 23.6 1.2 Sco X-1 255.9832 -37.8865 1.8 17.2 32.4 0.8917 6.3 2.5 4U 1700-377 256.3573 -36.4621 6.2 16.0 35.6 0.2647 1.8 4.4 GX 349+2 262.9785 -24.8853 4.8 6.7 86.8 0.3318 2.4 8.5 GX 1+4 264.6621 -44.5579 11.3 19.4 3.2 0.1391 1.0 7.3 4U 1735-44 268.3531 -1.4571 2.4 24.4 166.2 0.7189 4.8 0.9 SW J1753.5-0127 270.1179 -25.0711 9.9 0.7 156.1 0.1534 1.2 9.1 GX 5-1 270.2153 -25.7215 3.5 0.1 98.9 0.4526 3.4 4.9 GRS 1758-258 273.9176 -14.0570 1.9 12.2 -172.3 0.8601 6.2 5.3 GX 17+2 275.9910 -30.3609 3.9 6.8 -55.1 0.3992 3.0 3.4 H1820-303 285.0368 -25.0246 5.7 13.3 -99.0 0.2894 2.0 6.2 HT1900.1-2455 288.8199 10.9611 1.6 40.9 -160.7 1.6478 7.1 1.6 GRS 1915+105 262.9960 -33.8360 3.7 10.3 27.3 0.4230 3.1 0.4 GX 354-0 251.1284 8.8568 2.5 39.3 140.1 1.4142 4.6 ------ UNKNOWN 255.6770 -48.7717 1.9 25.7 13.5 0.8635 5.9 ------ UNKNOWN 278.1312 29.3673 2.5 55.6 179.2 2.8180 4.6 ------ UNKNOWN 290.1810 -16.0831 3.2 20.9 -122.7 0.5387 3.7 ------ UNKNOWN 297.1774 25.4053 3.4 57.4 -160.1 2.6366 3.4 ------ UNKNOWN 313.9427 -16.5419 3.0 41.5 -103.0 2.6895 3.8 ------ UNKNOWN