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 15:39:08 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger436429
======================================================================
Trigger: 00436429 Segment: 000
BAT Trigger Time: 309004373.696 [s; MET]
Trigger Stop: 309004374.72 [s; MET]
UTC: 2010-10-17T10:32:47.416220 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 291.377889105661 Dec: -35.1409002465417 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 20.22
Image Trigger?: NO
Rate S/N Ratio: 95.7548954362125 [ if not an image trigger ]
Image S/N Ratio: 20.22
Analysis Position: [ source = BAT ]
RA: 291.377889105661 Dec: -35.1409002465417 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 291.376741931395 Dec: -35.1404334548356 [deg; J2000]
{ 19h 25m 30.4s , -35d 08' 25.6" }
+/- 0.531248327955595 [arcmin] (estimated 90% radius based on SNR)
+/- 0.107271035281423 [arcmin] (formal 1-sigma fit error)
SNR: 75.0845209126248
Angular difference between the analysis and refined position is 0.062869 arcmin
Partial Coding Fraction: 0.4375 [ including projection effects ]
Duration
T90: 72.2319999337196 +/- 3.66001587388552
Measured from: -1.87199997901917
to: 70.3599999547005 [s; relative to TRIGTIME]
T50: 20.4479999542236 +/- 0.517006751342904
Measured from: 4.64399999380112
to: 25.0919999480247 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.58000004291534
to: 3.58000004291534 [s; relative to TRIGTIME]
Total Fluence
Measured from: -5.4879999756813
to: 130.568000018597 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 6.318273 9.463312 7.943354 2.415513
0.086072 0.093788 0.087256 0.069807 [error]
Peak 0.206983 0.374560 0.420962 0.147216
0.012394 0.015207 0.016297 0.013200 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 136.056 -5.488 130.568
T90 72.232 -1.872 70.360
T50 20.448 4.644 25.092
Peak 1.000 2.580 3.580
====== 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 -1.427 -0.030 0.030 - - - 1.34e-02 -2.15e-04 2.15e-04 36.020 57
CPL -1.367 -0.088 -0.026 592.682 -592.682 -592.682 1.42e-02 -9.65e-04 1.35e-03 36.270 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 -1.096 -0.075 0.075 - - - 8.02e-02 -3.45e-03 3.45e-03 53.280 57
CPL -0.707 -0.290 0.310 191.833 -60.029 345.223 1.20e-01 -3.00e-02 4.28e-02 47.890 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 2.17e-06 4.17e-06 6.21e-06 1.99e-05 1.75e-05 3.24e-05 erg/cm2
90%_error_low -7.72e-08 -8.68e-08 -1.06e-07 -8.07e-07 -2.74e-07 -8.33e-07 erg/cm2
90%_error_hi 7.85e-08 8.67e-08 1.06e-07 8.31e-07 2.74e-07 8.51e-07 erg/cm2
Peak flux PL 2.25e+00 2.88e+00 2.69e+00 4.43e+00 9.30e+00 1.22e+01 ph/cm2/s
90%_error_low -1.88e-01 -1.49e-01 -1.32e-01 -4.49e-01 -4.09e-01 -5.74e-01 ph/cm2/s
90%_error_hi 1.94e-01 1.48e-01 1.31e-01 4.79e-01 4.10e-01 5.80e-01 ph/cm2/s
Fluence CPL 2.15e-06 4.18e-06 6.23e-06 1.98e-05 1.75e-05 3.16e-05 erg/cm2
90%_error_low -1.10e-07 -7.81e-08 -6.52e-08 -3.30e-06 -2.89e-07 -2.41e-06 erg/cm2
90%_error_hi 9.23e-08 8.70e-08 1.32e-07 5.77e-07 2.85e-07 1.09e-06 erg/cm2
Peak flux CPL 1.04e+00 7.54e-01 3.79e-01 3.29e-01 2.31e+00 2.56e+00 ph/cm2/s
90%_error_low -2.86e-01 -2.24e-01 -1.00e-01 -6.85e-02 -6.86e-01 -7.77e-01 ph/cm2/s
90%_error_hi 3.05e-01 1.92e-01 7.35e-02 4.43e-02 5.79e-01 5.08e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 291.3767 -35.1404 0.0026 36.6142 -48.5428 12.8687436 75.085 TRIG_00436429 Foreground time interval of the image: -5.488 12.405 (delta_t = 17.893 [sec]) Background time interval of the image: -87.795 -5.488 (delta_t = 82.307 [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 -5.488 sec. to 130.568 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.42713 ( -0.0302075 0.030278 ) Norm@50keV : 1.33772E-02 ( -0.000214991 0.000214654 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 36.02 using 59 PHA bins. # Reduced chi-squared = 0.6319 for 57 degrees of freedom # Null hypothesis probability = 9.865024e-01 Photon flux (15-150 keV) in 136.1 sec: 1.63944 ( -0.03137 0.0315 ) ph/cm2/s Energy fluence (15-150 keV) : 1.74996e-05 ( -2.73852e-07 2.74109e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -5.488 sec. to 130.568 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.42261 ( -0.0312984 0.0299575 ) Epeak [keV] : 9997.85 ( -9992.58 -9992.58 ) Norm@50keV : 1.34423E-02 ( -0.0002116 0.00210198 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 36.01 using 59 PHA bins. # Reduced chi-squared = 0.6430 for 56 degrees of freedom # Null hypothesis probability = 9.826412e-01 Photon flux (15-150 keV) in 136.1 sec: 1.63496 ( -0.03672 0.01808 ) ph/cm2/s Energy fluence (15-150 keV) : 1.74682e-05 ( -2.89153e-07 2.85098e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 2.580 sec. to 3.580 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.09646 ( -0.0748746 0.075028 ) Norm@50keV : 8.02229E-02 ( -0.00345279 0.00345226 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 53.28 using 59 PHA bins. # Reduced chi-squared = 0.9347 for 57 degrees of freedom # Null hypothesis probability = 6.155339e-01 Photon flux (15-150 keV) in 1 sec: 9.30215 ( -0.40928 0.40956 ) ph/cm2/s Energy fluence (15-150 keV) : 8.39789e-07 ( -4.03046e-08 4.04488e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.580 sec. to 3.580 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.70663 ( -0.29027 0.310236 ) Epeak [keV] : 191.833 ( -60.0288 345.224 ) Norm@50keV : 0.119514 ( -0.0299849 0.0428076 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.89 using 59 PHA bins. # Reduced chi-squared = 0.8551 for 56 degrees of freedom # Null hypothesis probability = 7.713113e-01 Photon flux (15-150 keV) in 1 sec: 2.30950 ( -0.68565 0.5788 ) ph/cm2/s Energy fluence (15-150 keV) : 1.54333e-07 ( -3.11757e-08 2.55003e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 72.232 sec. Hardness ratio (energy fluence ratio) = 1.48751020232
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 6.343187e-06 S(50-150 keV) = 1.1156607e-05
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 = 4.919435740203281E-01, IMY = 5.568786709476784E-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: -87.795410 -5.488000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 285.1561 -24.9888 7.2 46.0 -38.5 -0.3362 -1.6 7.7 HT1900.1-2455 342.8159 -34.6587 2.3 6.5 90.3 0.4205 5.0 ------ UNKNOWN 284.9946 -78.8026 3.2 44.2 -117.9 1.3695 3.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -5.488000 12.404590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 285.0548 -24.7574 6.8 46.2 -38.3 -0.4890 -1.7 9.8 HT1900.1-2455 9.5546 -29.1200 3.4 28.2 127.2 0.4029 3.4 ------ UNKNOWN 9.2486 -63.3341 2.8 30.1 -158.6 0.4787 4.1 ------ UNKNOWN 299.2617 -17.3331 2.4 40.0 -17.9 0.7685 4.8 ------ UNKNOWN 20.4876 -68.3878 2.4 36.7 -155.4 0.6419 4.7 ------ UNKNOWN 291.3767 -35.1404 0.2 36.6 -48.5 12.8686 75.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 70.004590 154.470900 155.304000 962.343300 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 256.0341 -37.8469 2.3 28.4 -98.6 3.5538 5.0 2.3 4U 1700-377 256.4912 -36.4742 3.0 28.2 -95.7 2.8566 3.8 4.1 GX 349+2 262.9807 -24.7623 1.9 26.6 -67.4 3.6888 6.0 1.8 GX 1+4 264.8649 -44.5009 6.2 22.3 -115.5 1.0415 1.9 6.0 4U 1735-44 268.3402 -1.4844 2.5 39.9 -30.2 3.4539 4.5 2.5 SW J1753.5-0127 270.3341 -25.1828 3.7 20.7 -59.6 1.5960 3.2 6.8 GX 5-1 270.2710 -25.8413 3.1 20.4 -61.3 1.9082 3.8 6.1 GRS 1758-258 274.0008 -14.0405 2.6 26.3 -33.6 2.2527 4.4 0.4 GX 17+2 275.9202 -30.3191 2.3 13.9 -66.6 2.6344 5.1 2.9 H1820-303 285.0808 -24.9133 3.7 11.6 -22.4 1.5817 3.1 2.5 HT1900.1-2455 288.7901 10.9466 0.9 46.1 3.8 14.3785 13.0 0.5 GRS 1915+105 262.9511 -33.8002 2.0 23.4 -87.6 3.6134 5.7 2.8 GX 354-0 319.1765 2.8422 3.5 46.0 47.7 10.1798 3.3 ------ UNKNOWN 332.5738 -60.3626 3.0 36.4 154.1 3.7187 3.9 ------ UNKNOWN 284.5344 -0.7623 3.8 35.0 -4.6 2.1275 3.0 ------ UNKNOWN 267.0142 -24.8491 2.1 23.4 -63.2 3.5441 5.6 ------ UNKNOWN 255.1966 -41.6395 1.9 28.9 -106.6 4.5468 5.9 ------ UNKNOWN