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 16:55:29 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger430603
======================================================================
Trigger: 00430603 Segment: 000
BAT Trigger Time: 302420742.208 [s; MET]
Trigger Stop: 302420743.232 [s; MET]
UTC: 2010-08-02T05:45:36.166420 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 2.45693694544105 Dec: 47.7518131459574 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.45
Image Trigger?: NO
Rate S/N Ratio: 13.6014705087354 [ if not an image trigger ]
Image S/N Ratio: 7.45
Analysis Position: [ source = BAT ]
RA: 2.45693694544105 Dec: 47.7518131459574 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 2.47960573229079 Dec: 47.754237486235 [deg; J2000]
{ 00h 09m 55.1s , +47d 45' 15.3" }
+/- 1.06859250294004 [arcmin] (estimated 90% radius based on SNR)
+/- 0.287678017489466 [arcmin] (formal 1-sigma fit error)
SNR: 27.6667537339096
Angular difference between the analysis and refined position is 0.925948 arcmin
Partial Coding Fraction: 0.84375 [ including projection effects ]
Duration
T90: 487.339999973774 +/- 26.4184920237378
Measured from: 0.255999982357025
to: 487.595999956131 [s; relative to TRIGTIME]
T50: 355.987999916077 +/- 33.1335054317481
Measured from: 22.5040000081062
to: 378.491999924183 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.0759999752044678
to: 0.924000024795532 [s; relative to TRIGTIME]
Total Fluence
Measured from: -3.29199999570847
to: 531.77999997139 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.043257 2.485008 1.517021 0.292843
0.109002 0.111709 0.098021 0.085527 [error]
Peak 0.014038 0.044113 0.048557 0.009605
0.005434 0.005905 0.005510 0.004445 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 535.072 -3.292 531.780
T90 487.340 0.256 487.596
T50 355.988 22.504 378.492
Peak 1.000 -0.076 0.924
====== 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 -1.815 -0.103 0.101 - - - 7.04e-04 -4.34e-05 4.30e-05 64.110 57
CPL -1.399 -0.404 0.455 64.649 -14.898 373.897 1.19e-03 -4.67e-04 9.02e-04 61.080 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 -0.985 -0.224 0.234 - - - 8.13e-03 -1.16e-03 1.15e-03 66.740 57
CPL 0.305 -1.057 1.418 104.048 -27.188 183.130 2.96e-02 -2.96e-02 8.05e-02 62.200 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 6.47e-07 9.82e-07 1.12e-06 2.42e-06 3.47e-06 5.17e-06 erg/cm2
90%_error_low -5.55e-08 -5.35e-08 -9.40e-08 -3.97e-07 -2.16e-07 -4.89e-07 erg/cm2
90%_error_hi 5.68e-08 5.35e-08 9.45e-08 4.49e-07 2.19e-07 5.29e-07 erg/cm2
Peak flux PL 2.05e-01 2.80e-01 2.83e-01 5.19e-01 9.35e-01 1.29e+00 ph/cm2/s
90%_error_low -5.52e-02 -5.01e-02 -4.13e-02 -1.41e-01 -1.35e-01 -1.88e-01 ph/cm2/s
90%_error_hi 6.09e-02 4.95e-02 4.10e-02 1.72e-01 1.36e-01 1.93e-01 ph/cm2/s
Fluence CPL 6.15e-07 1.03e-06 1.11e-06 1.21e-06 3.32e-06 3.96e-06 erg/cm2
90%_error_low -6.44e-08 -6.85e-08 -1.02e-07 -5.63e-07 -2.59e-07 -6.28e-07 erg/cm2
90%_error_hi 6.50e-08 7.00e-08 1.01e-07 1.17e-06 2.62e-07 1.18e-06 erg/cm2
Peak flux CPL 1.43e-01 2.95e-01 3.27e-01 1.99e-01 8.93e-01 9.65e-01 ph/cm2/s
90%_error_low -6.53e-02 -5.89e-02 -5.45e-02 -1.03e-01 -1.40e-01 -1.79e-01 ph/cm2/s
90%_error_hi 7.55e-02 5.87e-02 5.64e-02 2.27e-01 1.41e-01 2.51e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
2.4796 47.7542 0.0070 29.1766 -7.2931 1.3623987 27.667 TRIG_00430603
Foreground time interval of the image:
-3.292 15.693 (delta_t = 18.985 [sec])
Background time interval of the image:
-169.107 -3.292 (delta_t = 165.815 [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 -3.292 sec. to 531.780 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.81514 ( -0.103218 0.101491 ) Norm@50keV : 7.04408E-04 ( -4.33699e-05 4.29775e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 64.11 using 59 PHA bins. # Reduced chi-squared = 1.125 for 57 degrees of freedom # Null hypothesis probability = 2.414245e-01 Photon flux (15-150 keV) in 535.1 sec: 9.76469E-02 ( -0.0054006 0.0054061 ) ph/cm2/s Energy fluence (15-150 keV) : 3.46884e-06 ( -2.16287e-07 2.1851e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -3.292 sec. to 531.780 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.3992 ( -0.403883 0.454732 ) Epeak [keV] : 64.6491 ( -14.898 373.897 ) Norm@50keV : 1.18816E-03 ( -0.000467261 0.000902126 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 61.08 using 59 PHA bins. # Reduced chi-squared = 1.091 for 56 degrees of freedom # Null hypothesis probability = 2.985141e-01 Photon flux (15-150 keV) in 535.1 sec: 9.54615E-02 ( -0.005801 0.0057945 ) ph/cm2/s Energy fluence (15-150 keV) : 3.31661e-06 ( -2.59476e-07 2.62083e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from -0.076 sec. to 0.924 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.985213 ( -0.223695 0.233873 ) Norm@50keV : 8.12828E-03 ( -0.00115956 0.001152 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 66.74 using 59 PHA bins. # Reduced chi-squared = 1.171 for 57 degrees of freedom # Null hypothesis probability = 1.770288e-01 Photon flux (15-150 keV) in 1 sec: 0.935130 ( -0.135156 0.1358 ) ph/cm2/s Energy fluence (15-150 keV) : 8.8369e-08 ( -1.28824e-08 1.29405e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.076 sec. to 0.924 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 0.304722 ( -1.05711 1.41757 ) Epeak [keV] : 104.048 ( -27.1875 183.131 ) Norm@50keV : 2.96052E-02 ( -0.0296052 0.0805384 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 62.20 using 59 PHA bins. # Reduced chi-squared = 1.111 for 56 degrees of freedom # Null hypothesis probability = 2.651047e-01 Photon flux (15-150 keV) in 1 sec: 0.892948 ( -0.139968 0.140512 ) ph/cm2/s Energy fluence (15-150 keV) : 8.40446e-08 ( -1.38086e-08 1.37376e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 487.34 sec. Hardness ratio (energy fluence ratio) = 1.13676295807
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 1.6297267e-06 S(50-150 keV) = 1.8391618e-06
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 = 5.538270890846754E-01, IMY = 7.087916796494229E-02
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: -169.107380 -3.292000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.6646 35.3877 0.0 46.4 -172.8 0.8432 3.4 10.5 Her X-1 299.5937 35.1942 1.5 20.9 135.7 1.1223 7.6 0.5 Cyg X-1 308.1228 40.9147 1.8 12.6 124.4 0.8139 6.4 2.3 Cyg X-3 326.2042 38.3035 4.2 15.2 63.7 0.3468 2.7 1.9 Cyg X-2 320.2826 24.9312 2.7 27.2 85.9 0.7971 4.3 ------ UNKNOWN 310.1552 49.8206 2.3 4.8 157.7 0.6622 5.1 ------ UNKNOWN 29.5319 33.7078 2.2 53.8 -7.7 2.0997 5.2 ------ UNKNOWN 1.3153 64.2938 2.6 25.7 -42.9 0.6314 4.5 ------ UNKNOWN 225.5724 56.7755 3.5 49.3 -133.6 2.0748 3.4 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -3.292000 15.692610 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.4431 35.3179 10.0 46.5 -172.8 0.0915 1.2 1.6 Her X-1 299.7138 35.3715 21.4 20.7 135.7 0.0269 0.5 11.9 Cyg X-1 307.9266 40.8893 8.7 12.7 125.0 0.0565 1.3 9.2 Cyg X-3 326.0015 38.4782 0.0 15.0 64.0 -0.0264 -0.6 12.3 Cyg X-2 2.4796 47.7542 0.4 29.2 -7.3 1.3625 27.7 ------ UNKNOWN 14.6587 47.9415 2.5 36.4 -14.5 0.2646 4.6 ------ UNKNOWN 240.3458 37.8724 2.4 53.3 -160.5 0.6074 4.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 68.692580 962.862000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 299.6183 35.3229 5.8 47.3 141.0 3.5650 2.0 7.4 Cyg X-1 308.0887 40.9851 2.9 38.6 142.8 3.6833 3.9 2.2 Cyg X-3 326.1622 38.1994 4.0 27.9 125.6 1.6862 2.9 7.3 Cyg X-2 20.2566 -2.9750 3.1 53.1 19.7 7.1540 3.8 ------ UNKNOWN 2.4526 47.7501 1.0 0.0 -165.9 4.6493 11.3 ------ UNKNOWN 36.8820 -0.8340 3.3 57.0 -0.2 7.2683 3.5 ------ UNKNOWN 32.1470 13.3000 3.1 42.4 -3.5 2.4713 3.7 ------ UNKNOWN 249.2513 61.0945 3.0 58.7 -169.2 10.6421 3.8 ------ UNKNOWN 47.0953 17.2145 2.8 47.5 -23.5 3.4666 4.0 ------ UNKNOWN 234.7349 66.9036 3.8 58.7 -159.2 12.8138 3.0 ------ UNKNOWN 143.3939 83.9614 2.9 47.1 -132.7 6.4749 4.0 ------ UNKNOWN 63.2494 33.4410 4.5 47.0 -53.3 5.6711 2.6 ------ UNKNOWN