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: Mon Jan 13 20:40:04 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger503652
======================================================================
Trigger: 00503652 Segment: 000
BAT Trigger Time: 338305887.552 [s; MET]
Trigger Stop: 338305891.648 [s; MET]
UTC: 2011-09-21T13:51:20.163880 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 294.077815153217 Dec: 36.376808367908 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.66
Image Trigger?: NO
Rate S/N Ratio: 15.0332963783729 [ if not an image trigger ]
Image S/N Ratio: 9.66
Analysis Position: [ source = BAT ]
RA: 294.077815153217 Dec: 36.376808367908 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 294.093934048033 Dec: 36.357578718842 [deg; J2000]
{ 19h 36m 22.5s , +36d 21' 27.3" }
+/- 1.56079249237844 [arcmin] (estimated 90% radius based on SNR)
+/- 0.652993927908694 [arcmin] (formal 1-sigma fit error)
SNR: 16.1031559192677
Angular difference between the analysis and refined position is 1.392008 arcmin
Partial Coding Fraction: 0.15625 [ including projection effects ]
Duration
T90: 32.5479999780655 +/- 4.44203784150322
Measured from: -20.2639999985695
to: 12.283999979496 [s; relative to TRIGTIME]
T50: 15.8439999222755 +/- 6.34405323471446
Measured from: -10.727999985218
to: 5.1159999370575 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 2.87200003862381
to: 3.87200003862381 [s; relative to TRIGTIME]
Total Fluence
Measured from: -24.0320000052452
to: 13.5760000348091 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.852359 1.253746 0.885652 0.279251
0.101594 0.100858 0.091382 0.087623 [error]
Peak 0.041059 0.098261 0.087862 0.030262
0.017017 0.017359 0.017223 0.015033 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 37.608 -24.032 13.576
T90 32.548 -20.264 12.284
T50 15.844 -10.728 5.116
Peak 1.000 2.872 3.872
====== 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 -1.644 -0.169 0.167 - - - 6.19e-03 -5.96e-04 5.92e-04 46.770 57
CPL -1.538 -1.103 0.585 213.518 -213.508 -213.518 7.02e-03 N/A N/A 46.810 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 -1.264 -0.350 0.362 - - - 1.84e-02 -3.82e-03 3.82e-03 44.210 57
CPL -0.748 -0.943 1.712 133.065 -133.065 -133.065 3.20e-02 -1.71e-02 1.53e-01 43.770 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 3.40e-07 5.73e-07 7.33e-07 1.88e-06 2.17e-06 3.53e-06 erg/cm2
90%_error_low -5.34e-08 -5.56e-08 -9.31e-08 -4.67e-07 -2.20e-07 -5.48e-07 erg/cm2
90%_error_hi 5.57e-08 5.52e-08 9.26e-08 5.61e-07 2.22e-07 6.21e-07 erg/cm2
Peak flux PL 6.03e-01 6.99e-01 5.82e-01 8.15e-01 2.18e+00 2.70e+00 ph/cm2/s
90%_error_low -2.26e-01 -1.77e-01 -1.36e-01 -3.37e-01 -4.77e-01 -5.67e-01 ph/cm2/s
90%_error_hi 2.59e-01 1.72e-01 1.34e-01 4.56e-01 4.81e-01 5.73e-01 ph/cm2/s
Fluence CPL 3.39e-07 5.75e-07 7.34e-07 1.80e-06 2.16e-06 3.45e-06 erg/cm2
90%_error_low -6.23e-08 -5.68e-08 -9.27e-08 -1.10e-06 -2.44e-07 -1.13e-06 erg/cm2
90%_error_hi 4.84e-08 6.73e-08 9.80e-08 4.04e-07 2.25e-07 6.72e-07 erg/cm2
Peak flux CPL 5.36e-01 7.25e-01 6.17e-01 4.97e-01 2.14e+00 2.38e+00 ph/cm2/s
90%_error_low -2.69e-01 -1.91e-01 -1.59e-01 -4.97e-01 -4.87e-01 -6.41e-01 ph/cm2/s
90%_error_hi 3.02e-01 1.99e-01 1.70e-01 4.50e-01 4.92e-01 7.25e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 294.0939 36.3576 0.0119 47.3802 22.9025 3.5894283 16.103 TRIG_00503652 Foreground time interval of the image: -24.032 13.576 (delta_t = 37.608 [sec]) Background time interval of the image: -520.051 -503.794 (delta_t = 16.257 [sec]) -239.552 -24.032 (delta_t = 215.520 [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 -24.032 sec. to 13.576 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.64417 ( -0.169438 0.167232 ) Norm@50keV : 6.19071E-03 ( -0.000596224 0.000591938 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 46.77 using 59 PHA bins. # Reduced chi-squared = 0.8205 for 57 degrees of freedom # Null hypothesis probability = 8.312955e-01 Photon flux (15-150 keV) in 37.61 sec: 0.806840 ( -0.077715 0.078031 ) ph/cm2/s Energy fluence (15-150 keV) : 2.16702e-06 ( -2.19808e-07 2.21799e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -24.032 sec. to 13.576 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.64236 ( -1.09635 0.592142 ) Epeak [keV] : 9601.94 ( -9521.31 -9521.32 ) Norm@50keV : 6.20429E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 46.76 using 59 PHA bins. # Reduced chi-squared = 0.8351 for 56 degrees of freedom # Null hypothesis probability = 8.056187e-01 Photon flux (15-150 keV) in 37.61 sec: 0.805765 ( -0.081061 0.078787 ) ph/cm2/s Energy fluence (15-150 keV) : 2.16244e-06 ( -2.4362e-07 2.24569e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 2.872 sec. to 3.872 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.26426 ( -0.350487 0.361508 ) Norm@50keV : 1.83657E-02 ( -0.00382191 0.00381775 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 44.21 using 59 PHA bins. # Reduced chi-squared = 0.7756 for 57 degrees of freedom # Null hypothesis probability = 8.921341e-01 Photon flux (15-150 keV) in 1 sec: 2.17733 ( -0.47668 0.48067 ) ph/cm2/s Energy fluence (15-150 keV) : 1.83143e-07 ( -4.0224e-08 4.04973e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 2.872 sec. to 3.872 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.748345 ( -0.943142 1.71157 ) Epeak [keV] : 133.065 ( -133.065 -133.065 ) Norm@50keV : 3.20463E-02 ( -0.0170593 0.152794 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.77 using 59 PHA bins. # Reduced chi-squared = 0.7817 for 56 degrees of freedom # Null hypothesis probability = 8.825132e-01 Photon flux (15-150 keV) in 1 sec: 2.13502 ( -0.48662 0.49197 ) ph/cm2/s Energy fluence (15-150 keV) : 4.5195e-08 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 32.548 sec. Hardness ratio (energy fluence ratio) = 1.27973488234
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 9.133193e-07 S(50-150 keV) = 1.2537019e-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 = 1.001069459169128E+00, IMY = -4.229192195949183E-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: -520.051400 -503.794100 -239.552000 -24.032000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9820 -15.6490 0.4 33.6 -99.2 12.1027 30.7 0.5 Sco X-1 254.5872 35.3245 20.3 49.6 -19.9 -0.2879 -0.6 6.4 Her X-1 256.0451 -37.8123 2.1 35.5 -142.4 1.6442 5.4 3.4 4U 1700-377 256.5781 -36.2973 10.7 34.1 -141.3 0.3059 1.1 10.2 GX 349+2 263.1731 -24.8037 7.4 21.8 -133.2 0.3090 1.6 9.6 GX 1+4 264.7995 -44.3069 9.2 37.5 -157.6 0.3408 1.3 8.9 4U 1735-44 268.3449 -1.4690 3.7 12.6 -49.3 0.6051 3.1 1.7 SW J1753.5-0127 270.2791 -25.0663 1.9 18.2 -148.9 1.2325 6.0 0.8 GX 5-1 270.4626 -25.7392 1589.2 18.7 -150.3 0.0014 0.0 8.7 GRS 1758-258 274.0224 -13.9663 3.1 6.9 -133.2 0.7259 3.7 4.3 GX 17+2 275.9685 -30.4089 6.5 21.8 -167.7 0.3463 1.8 3.4 H1820-303 284.9993 -24.9378 4.5 17.3 166.4 0.5553 2.6 2.2 HT1900.1-2455 288.8117 10.9617 1.5 22.1 33.3 1.7343 7.7 1.3 GRS 1915+105 299.6095 35.2008 1.6 48.2 29.0 5.2239 7.0 0.9 Cyg X-1 262.9465 -33.9069 2.5 29.0 -146.4 1.0561 4.5 4.8 GX 354-0 273.5688 4.0979 3.0 13.8 -15.8 0.7284 3.8 ------ UNKNOWN 259.2876 43.1582 2.1 54.8 -11.2 3.9608 5.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -24.032000 13.576000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8802 -15.7607 6.0 33.7 -99.3 -0.2839 -1.9 9.2 Sco X-1 254.5899 35.2775 10.9 49.6 -20.0 0.1725 1.1 7.6 Her X-1 255.9729 -37.7004 47.2 35.5 -142.2 -0.0246 -0.2 8.6 4U 1700-377 256.5963 -36.2994 0.0 34.1 -141.3 -0.0697 -0.7 10.7 GX 349+2 262.9850 -24.6871 6.7 21.9 -132.7 0.1358 1.7 3.7 GX 1+4 264.9016 -44.3131 0.0 37.5 -157.8 -0.1382 -1.4 10.7 4U 1735-44 268.2314 -1.6149 0.0 12.6 -50.1 -0.1373 -1.9 12.7 SW J1753.5-0127 270.1108 -24.9371 0.0 18.1 -148.3 -0.0642 -0.9 12.7 GX 5-1 270.4765 -25.8853 0.0 18.8 -150.5 -0.1851 -2.7 12.7 GRS 1758-258 274.1540 -13.9682 5.3 6.8 -134.0 -0.1598 -2.2 9.5 GX 17+2 275.8102 -30.2243 3.8 21.6 -167.3 0.2138 3.1 10.4 H1820-303 285.1914 -25.0163 6.2 17.4 165.9 -0.1380 -1.8 10.2 HT1900.1-2455 288.9229 11.1007 0.0 22.3 33.3 0.0549 0.7 11.8 GRS 1915+105 299.7477 35.0425 5.3 48.1 29.3 -0.6042 -2.2 12.3 Cyg X-1 262.9487 -33.8747 6.1 29.0 -146.3 -0.1608 -1.9 3.1 GX 354-0 294.0939 36.3576 0.7 47.4 22.9 3.5899 16.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 106.548600 962.498200 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 254.3777 35.3962 6.9 32.0 -96.1 1.4037 1.7 5.1 Her X-1 268.3664 -1.5655 7.0 44.9 -158.4 1.5496 1.7 6.8 SW J1753.5-0127 273.9276 -13.9087 18.2 53.8 -171.9 0.9586 0.6 8.9 GX 17+2 288.7984 10.9415 0.8 25.9 175.6 7.2047 14.7 0.2 GRS 1915+105 299.5833 35.1793 0.5 4.6 87.1 9.2749 21.8 1.4 Cyg X-1 308.1438 40.9499 1.6 11.9 46.7 3.2354 7.0 1.5 Cyg X-3 326.0523 38.3824 6.6 25.3 59.4 1.0346 1.7 6.7 Cyg X-2 348.5901 52.3375 3.1 41.0 33.0 3.5636 3.7 ------ UNKNOWN 23.0655 72.4674 2.8 55.3 5.1 9.1259 4.0 ------ UNKNOWN 340.0968 70.1077 2.2 41.6 5.3 3.7802 5.1 ------ UNKNOWN 274.8096 17.9687 2.7 25.1 -148.5 2.0941 4.4 ------ UNKNOWN 248.0429 75.6101 3.8 44.5 -31.2 2.7016 3.1 ------ UNKNOWN 256.5340 34.8899 2.9 30.4 -97.8 2.5831 4.0 ------ UNKNOWN 220.1605 67.6812 4.8 50.7 -44.5 7.0642 2.4 ------ UNKNOWN 232.8930 56.1764 4.2 44.9 -60.1 6.5118 2.7 ------ UNKNOWN 250.0221 9.5927 3.0 48.0 -129.0 7.8074 3.8 ------ UNKNOWN