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 19:03:22 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger419932
======================================================================
Trigger: 00419932 Segment: 000
BAT Trigger Time: 293433768 [s; MET]
Trigger Stop: 293433832 [s; MET]
UTC: 2010-04-20T05:22:42.276700 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 296.127555899969 Dec: 55.7926334166084 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.37
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.37
Analysis Position: [ source = BAT ]
RA: 296.127555899969 Dec: 55.7926334166084 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 296.128 Dec: 55.7926 [deg; J2000]
{ 19h 44m 30.7s , +55d 47' 33.4" }
+/- 3.14154316885 [arcmin] (estimated 90% radius based on SNR)
SNR: 5.92885551004
Angular difference between the analysis and refined position is 0.015114 arcmin
Partial Coding Fraction: 0.921875 [ including projection effects ]
Duration
T90: 62.9799999594688 +/- 17.5188230435795
Measured from: 1.19599997997284
to: 64.1759999394417 [s; relative to TRIGTIME]
T50: 21.1039999723434 +/- 22.4090186393284
Measured from: 18.4359999895096
to: 39.539999961853 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 28.7039999961853
to: 29.7039999961853 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.73199999332428
to: 68.6200000047684 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.182974 0.315075 0.216286 0.062287
0.046787 0.048817 0.044393 0.042727 [error]
Peak 0.011170 0.015803 0.006688 0.010382
0.005703 0.005806 0.005266 0.005164 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 69.352 -0.732 68.620
T90 62.980 1.196 64.176
T50 21.104 18.436 39.540
Peak 1.000 28.704 29.704
====== 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 -1.294 -0.308 0.310 - - - 7.23e-04 -1.34e-04 1.34e-04 54.460 57
CPL -0.243 -1.181 1.988 79.420 -24.776 -79.420 2.57e-03 -2.57e-03 2.63e-02 52.680 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 -1.286 -1.108 1.286 - - - 2.33e-03 -1.22e-03 1.09e-03 55.300 57
CPL -1.376 1.376 1.390 9999.350 N/A N/A 2.25e-03 N/A N/A 55.330 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 5.28e-08 1.10e-07 1.80e-07 6.59e-07 4.96e-07 1.00e-06 erg/cm2
90%_error_low -1.57e-08 -2.14e-08 -4.19e-08 -2.75e-07 -1.03e-07 -3.16e-07 erg/cm2
90%_error_hi 1.69e-08 2.11e-08 4.19e-08 3.92e-07 1.06e-07 4.16e-07 erg/cm2
Peak flux PL 7.79e-02 8.91e-02 7.32e-02 1.01e-01 2.77e-01 3.41e-01 ph/cm2/s
90%_error_low -7.79e-02 -8.91e-02 -7.32e-02 -1.01e-01 -2.77e-01 -1.66e-01 ph/cm2/s
90%_error_hi 8.20e-02 4.60e-02 4.46e-02 4.97e-01 1.31e-01 1.06e+00 ph/cm2/s
Fluence CPL 4.55e-08 1.23e-07 1.85e-07 1.56e-07 4.45e-07 5.09e-07 erg/cm2
90%_error_low -1.84e-08 -2.75e-08 -5.19e-08 -1.32e-07 -1.18e-07 -1.78e-07 erg/cm2
90%_error_hi 1.94e-08 3.03e-08 4.84e-08 1.12e-06 1.24e-07 6.36e-07 erg/cm2
Peak flux CPL 8.57e-02 8.95e-02 7.22e-02 9.66e-02 2.82e-01 3.44e-01 ph/cm2/s
90%_error_low N/A -8.95e-02 N/A N/A -2.82e-01 -1.75e-01 ph/cm2/s
90%_error_hi N/A 4.72e-02 N/A N/A 1.27e-01 3.52e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-50.0 keV image (Event data)
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 296.128 55.793 0.000 15.787 140.560 0.412 5.929 TRIG_00419932 Image time interval: 0.000 to 64.000 [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 -0.732 sec. to 68.620 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.29427 ( -0.307848 0.310503 ) Norm@50keV : 7.22951E-04 ( -0.000134164 0.000133511 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.46 using 59 PHA bins. # Reduced chi-squared = 0.9555 for 57 degrees of freedom # Null hypothesis probability = 5.708099e-01 Photon flux (15-150 keV) in 69.35 sec: 8.61608E-02 ( -0.0158025 0.0158202 ) ph/cm2/s Energy fluence (15-150 keV) : 4.96188e-07 ( -1.03465e-07 1.06075e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.732 sec. to 68.620 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.242954 ( -1.18139 1.98773 ) Epeak [keV] : 79.4204 ( -24.7748 -79.4197 ) Norm@50keV : 2.56994E-03 ( -0.00257 0.0262701 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 52.68 using 59 PHA bins. # Reduced chi-squared = 0.9407 for 56 degrees of freedom # Null hypothesis probability = 6.013054e-01 Photon flux (15-150 keV) in 69.35 sec: 8.23135E-02 ( -0.016668 0.0166114 ) ph/cm2/s Energy fluence (15-150 keV) : 4.45416e-07 ( -1.18146e-07 1.24402e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 28.704 sec. to 29.704 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.28629 ( -1.10884 1.28514 ) Norm@50keV : 2.32584E-03 ( -0.00121587 0.00109259 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 55.30 using 59 PHA bins. # Reduced chi-squared = 0.9702 for 57 degrees of freedom # Null hypothesis probability = 5.391155e-01 Photon flux (15-150 keV) in 1 sec: 0.276749 ( -0.276749 0.130883 ) ph/cm2/s Energy fluence (15-150 keV) : 2.30786e-08 ( -1.27255e-08 1.40561e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 28.704 sec. to 29.704 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.42708 ( 2.42732 2.44213 ) Epeak [keV] : 141.217 ( ) Norm@50keV : 5.54743E-04 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.42 using 59 PHA bins. # Reduced chi-squared = 0.9718 for 56 degrees of freedom # Null hypothesis probability = 5.347755e-01 Photon flux (15-150 keV) in 1 sec: 0.282165 ( -0.282165 0.127032 ) ph/cm2/s Energy fluence (15-150 keV) : 2.22065e-08 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 62.98 sec. Hardness ratio (energy fluence ratio) = 1.63094767688
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.62902e-07 S(50-150 keV) = 3.332932e-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 = -0.218346559425, IMY = -0.179608973732
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: -6.299410 -0.732000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.9984 10.8441 0.0 41.6 45.5 0.0681 0.9 13.3 GRS 1915+105 299.5766 35.1854 1.3 16.1 58.5 0.2391 8.6 1.2 Cyg X-1 308.0779 40.8899 12.2 7.3 54.9 -0.0237 -0.9 4.0 Cyg X-3 326.1783 38.3156 29.6 10.8 -46.2 -0.0099 -0.4 0.5 Cyg X-2 322.1166 0.5180 2.2 45.6 -5.1 0.2512 5.2 ------ UNKNOWN 34.0450 62.3201 2.3 45.6 -136.3 0.3236 5.0 ------ UNKNOWN 23.6457 50.6970 2.4 44.0 -118.1 0.5072 4.9 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.732000 68.620000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.6752 10.8901 3.3 41.7 46.0 3.3438 3.5 8.0 GRS 1915+105 299.7831 35.1235 6.1 16.0 58.0 -0.6648 -1.9 10.6 Cyg X-1 308.0630 40.9399 6.5 7.3 55.4 0.5809 1.8 2.3 Cyg X-3 326.1860 38.2520 7.7 10.9 -45.9 0.4867 1.5 4.2 Cyg X-2 329.7998 -10.4438 2.3 57.6 -12.5 9.0438 5.0 ------ UNKNOWN 7.4629 46.3679 2.2 35.3 -106.1 3.2337 5.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 114.100580 963.022800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.5871 35.2667 5.5 34.8 79.8 -2.8185 -2.1 7.8 Her X-1 288.7841 10.9534 1.8 45.2 18.4 7.5305 6.6 1.0 GRS 1915+105 299.5900 35.2031 0.2 20.7 0.2 33.2225 61.0 0.1 Cyg X-1 308.1213 40.9479 1.2 16.8 -24.7 4.8930 9.2 0.6 Cyg X-3 326.2448 38.3483 5.8 26.6 -53.5 1.3666 2.0 3.8 Cyg X-2 166.8529 63.6758 2.8 54.3 163.2 13.1281 4.1 ------ UNKNOWN 201.9846 68.1374 2.5 41.2 153.9 5.4507 4.5 ------ UNKNOWN 253.6127 68.0588 2.5 22.8 147.5 2.8708 4.7 ------ UNKNOWN 139.0470 65.8395 3.0 57.1 177.3 15.2692 3.8 ------ UNKNOWN 300.9364 0.6554 2.2 55.3 2.3 11.2965 5.2 ------ UNKNOWN 307.3559 -0.2596 3.4 56.8 -5.3 8.5895 3.4 ------ UNKNOWN 329.3153 30.3932 3.0 34.5 -48.3 2.7917 3.8 ------ UNKNOWN 322.9771 5.6850 2.5 54.5 -25.3 8.6641 4.6 ------ UNKNOWN 331.1490 15.4162 2.7 48.4 -39.5 7.4339 4.4 ------ UNKNOWN 339.6713 21.5179 3.1 47.0 -53.1 10.4325 3.7 ------ UNKNOWN 3.3343 46.9703 4.2 41.1 -98.8 9.1843 2.8 ------ UNKNOWN