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: Thu Oct 1 10:09:11 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger652334
======================================================================
Trigger: 00652334 Segment: 000
BAT Trigger Time: 461469928.384 [s; MET]
Trigger Stop: 461469928.64 [s; MET]
UTC: 2015-08-17T02:05:13.380060 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 249.643455724632 Dec: -12.065631269064 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.83
Image Trigger?: NO
Rate S/N Ratio: 26.2678510731274 [ if not an image trigger ]
Image S/N Ratio: 10.83
Analysis Position: [ source = BAT ]
RA: 249.643455724632 Dec: -12.065631269064 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 249.634059417604 Dec: -12.0519580068529 [deg; J2000]
{ 16h 38m 32.2s , -12d 03' 07.0" }
+/- 0.738112703441205 [arcmin] (estimated 90% radius based on SNR)
+/- 0.219918557222229 [arcmin] (formal 1-sigma fit error)
SNR: 46.9369160821068
Angular difference between the analysis and refined position is 0.988445 arcmin
Partial Coding Fraction: 0.71875 [ including projection effects ]
Duration
T90: 37.9959999322891 +/- 2.13080735521689
Measured from: -5.81999999284744
to: 32.1759999394417 [s; relative to TRIGTIME]
T50: 15.9439999461174 +/- 2.59793456869933
Measured from: 3.3759999871254
to: 19.3199999332428 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 11.216000020504
to: 12.216000020504 [s; relative to TRIGTIME]
Total Fluence
Measured from: -16.7639999985695
to: 58.7319999933243 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 3.315471 4.021489 2.480141 0.480642
0.065662 0.062314 0.051838 0.039379 [error]
Peak 0.220231 0.402648 0.457270 0.152518
0.011021 0.013023 0.013683 0.009564 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 75.496 -16.764 58.732
T90 37.996 -5.820 32.176
T50 15.944 3.376 19.320
Peak 1.000 11.216 12.216
====== 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 -1.775 -0.044 0.044 - - - 8.54e-03 -1.92e-04 1.92e-04 47.670 57
CPL -1.605 -0.172 0.180 123.185 -37.785 7921.985 1.03e-02 -1.61e-03 2.15e-03 44.900 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 -0.940 -0.061 0.062 - - - 8.36e-02 -2.88e-03 2.87e-03 43.290 57
CPL -0.849 -0.117 0.241 758.910 -758.910 -758.910 9.15e-02 -1.31e-02 2.35e-02 42.840 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 1.07e-06 1.66e-06 1.94e-06 4.37e-06 5.94e-06 9.03e-06 erg/cm2
90%_error_low -4.75e-08 -4.22e-08 -5.63e-08 -2.84e-07 -1.36e-07 -3.15e-07 erg/cm2
90%_error_hi 4.84e-08 4.22e-08 5.62e-08 2.97e-07 1.36e-07 3.24e-07 erg/cm2
Peak flux PL 9.61e-04 9.85e-03 1.08e-01 1.18e+01 4.80e-01 1.20e+01 ph/cm2/s
90%_error_low N/A N/A N/A N/A N/A N/A ph/cm2/s
90%_error_hi N/A N/A N/A N/A N/A N/A ph/cm2/s
Fluence CPL 1.02e-06 1.67e-06 1.96e-06 3.47e-06 5.86e-06 8.12e-06 erg/cm2
90%_error_low -6.18e-08 -4.54e-08 -6.02e-08 -7.11e-07 -1.58e-07 -7.33e-07 erg/cm2
90%_error_hi 6.30e-08 4.56e-08 6.07e-08 9.21e-07 1.58e-07 9.39e-07 erg/cm2
Peak flux CPL 1.96e+00 2.85e+00 2.99e+00 5.18e+00 9.57e+00 1.30e+01 ph/cm2/s
90%_error_low -1.94e-01 -1.28e-01 -1.16e-01 -1.07e+00 -3.46e-01 -1.13e+00 ph/cm2/s
90%_error_hi 1.76e-01 1.29e-01 1.38e-01 7.17e-01 3.40e-01 7.48e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 249.6341 -12.0520 0.0041 21.6837 -102.9729 3.8790332 46.937 TRIG_00652334 Foreground time interval of the image: -16.764 10.117 (delta_t = 26.881 [sec]) Background time interval of the image: -154.283 -16.764 (delta_t = 137.519 [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 -16.764 sec. to 58.732 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.77457 ( -0.0443759 0.0442923 ) Norm@50keV : 8.54140E-03 ( -0.000192276 0.000192213 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.67 using 59 PHA bins. # Reduced chi-squared = 0.8363 for 57 degrees of freedom # Null hypothesis probability = 8.059732e-01 Photon flux (15-150 keV) in 75.5 sec: 1.16564 ( -0.03065 0.0308 ) ph/cm2/s Energy fluence (15-150 keV) : 5.94384e-06 ( -1.35698e-07 1.35932e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -16.764 sec. to 58.732 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.60532 ( -0.172488 0.180304 ) Epeak [keV] : 123.185 ( -37.7862 7921.98 ) Norm@50keV : 1.02600E-02 ( -0.0016133 0.00215252 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 44.90 using 59 PHA bins. # Reduced chi-squared = 0.8018 for 56 degrees of freedom # Null hypothesis probability = 8.561870e-01 Photon flux (15-150 keV) in 75.5 sec: 1.14792 ( -0.03514 0.03537 ) ph/cm2/s Energy fluence (15-150 keV) : 5.86337e-06 ( -1.58219e-07 1.57747e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 11.216 sec. to 12.216 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.940054 ( -0.0613719 0.0617734 ) Norm@50keV : 8.36366E-02 ( -0.00287942 0.00287159 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 43.29 using 59 PHA bins. # Reduced chi-squared = 0.7595 for 57 degrees of freedom # Null hypothesis probability = 9.099384e-01 Photon flux (15-150 keV) in 1 sec: 0.479969 ( ) ph/cm2/s Energy fluence (15-150 keV) : 9.24485e-07 ( -3.42186e-08 3.42973e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 11.216 sec. to 12.216 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.8487 ( -0.116755 0.24112 ) Epeak [keV] : 758.910 ( -758.91 -758.91 ) Norm@50keV : 9.14666E-02 ( -0.0131089 0.0235463 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 42.84 using 59 PHA bins. # Reduced chi-squared = 0.7650 for 56 degrees of freedom # Null hypothesis probability = 9.019059e-01 Photon flux (15-150 keV) in 1 sec: 9.56870 ( -0.34598 0.3396 ) ph/cm2/s Energy fluence (15-150 keV) : 9.21446e-07 ( -3.52904e-08 3.48669e-08 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 37.996 sec. Hardness ratio (energy fluence ratio) = 1.16917609172
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 2.723698e-06 S(50-150 keV) = 3.220143e-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 = -8.926171229124183E-02, IMY = 3.874711303892153E-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: -154.283420 -16.764000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9887 -15.6387 0.5 26.9 -109.2 4.7844 23.7 0.5 Sco X-1 254.3189 35.2642 5.1 45.7 -18.7 0.5862 2.3 8.3 Her X-1 255.8897 -37.8533 9.7 33.3 -157.1 -0.1983 -1.2 4.6 4U 1700-377 256.5807 -36.5831 21.5 31.9 -156.8 -0.0835 -0.5 11.9 GX 349+2 262.8521 -24.6395 3.0 18.8 -155.3 0.5662 3.9 10.7 GX 1+4 264.5758 -44.2994 5.5 37.2 -171.5 0.3908 2.1 11.5 4U 1735-44 268.2200 -1.5005 7.8 6.8 -25.4 -0.2160 -1.5 9.3 SW J1753.5-0127 270.2611 -25.0525 7.6 17.5 -176.6 0.2026 1.5 2.0 GX 5-1 270.2517 -25.7882 3.1 18.2 -176.7 0.5048 3.7 3.9 GRS 1758-258 274.0745 -13.8850 3.4 6.9 156.6 0.4732 3.4 9.9 GX 17+2 275.7609 -30.2244 0.0 23.0 170.5 0.0814 0.6 12.1 H1820-303 284.8719 -24.7900 0.0 21.6 145.0 0.2255 1.4 11.9 HT1900.1-2455 288.8707 10.7989 7.9 25.5 44.6 -0.2657 -1.5 9.8 GRS 1915+105 299.6031 35.2286 1.4 50.5 30.9 5.6309 8.0 1.7 Cyg X-1 263.0544 -33.6892 18.9 27.2 -164.4 0.0886 0.6 9.3 GX 354-0 311.6649 -13.4391 2.8 40.2 102.5 2.3845 4.1 ------ UNKNOWN 287.2203 -16.9859 2.7 18.3 123.1 0.6455 4.2 ------ UNKNOWN 257.5214 -32.2393 2.2 27.7 -153.9 0.7814 5.2 ------ UNKNOWN 245.3017 -16.8055 2.4 26.9 -111.8 0.9605 4.7 ------ UNKNOWN 239.7676 -52.7708 2.9 51.9 -155.7 1.4590 3.9 ------ UNKNOWN 240.5364 44.4981 2.8 58.9 -24.5 4.0225 4.1 ------ UNKNOWN UNKNOWN UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -16.764000 10.116600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8433 -15.6910 10.6 27.0 -109.2 -0.1019 -1.1 8.4 Sco X-1 254.5868 35.2131 0.0 45.6 -18.4 -0.1130 -0.9 10.0 Her X-1 255.8649 -37.7353 16.7 33.2 -156.9 0.0563 0.7 8.7 4U 1700-377 256.3883 -36.5658 5.3 32.0 -156.6 0.1826 2.2 8.9 GX 349+2 263.0883 -24.8876 13.5 19.0 -156.2 0.0604 0.9 9.6 GX 1+4 264.5749 -44.4289 6.3 37.3 -171.6 -0.1667 -1.8 7.3 4U 1735-44 268.5166 -1.3396 6.6 6.8 -22.5 0.1207 1.7 11.2 SW J1753.5-0127 270.2808 -25.0817 184.5 17.5 -176.7 -0.0041 -0.1 0.2 GX 5-1 270.3001 -25.7394 42.3 18.2 -176.8 0.0187 0.3 0.3 GRS 1758-258 274.0027 -14.0219 80.6 7.0 157.6 0.0100 0.1 0.9 GX 17+2 276.0892 -30.5094 0.0 23.4 169.9 -0.2227 -3.1 12.0 H1820-303 284.8719 -24.7900 0.0 21.6 145.0 -0.0727 -0.9 11.9 HT1900.1-2455 288.7793 10.9767 6.7 25.5 44.2 0.1525 1.7 2.2 GRS 1915+105 299.5993 35.2071 5.5 50.5 30.9 -0.7393 -2.1 0.5 Cyg X-1 263.1336 -33.7153 6.3 27.2 -164.6 0.1364 1.8 10.2 GX 354-0 302.3987 32.3958 2.2 49.8 35.6 1.7899 5.3 ------ UNKNOWN 287.7003 -59.4056 2.5 53.3 170.2 1.2315 4.6 ------ UNKNOWN 275.3813 -6.7540 2.0 4.3 79.7 0.3927 5.9 ------ UNKNOWN 249.6341 -12.0520 0.2 21.7 -103.0 3.8789 46.9 ------ UNKNOWN 249.5139 25.3986 2.5 39.1 -31.2 0.4886 4.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 54.116600 482.746000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9874 -15.6459 0.3 5.8 -139.5 5.6588 35.6 0.6 Sco X-1 254.5441 35.3787 10.9 47.7 -5.3 0.3596 1.1 4.8 Her X-1 255.9092 -37.9137 4.3 26.5 158.2 0.5405 2.7 5.6 4U 1700-377 256.3401 -36.5539 14.1 25.2 156.7 0.1672 0.8 9.1 GX 349+2 262.8578 -24.6616 8.3 17.7 126.5 0.2459 1.4 9.7 GX 1+4 264.7488 -44.4639 3.8 34.9 150.4 0.8849 3.0 0.9 4U 1735-44 268.5006 -1.3309 4.7 21.5 50.9 -0.5033 -2.5 10.8 SW J1753.5-0127 270.3769 -24.9420 25.4 23.4 115.6 0.0971 0.5 9.7 GX 5-1 270.3795 -25.6051 2.9 23.8 117.0 0.8688 4.0 9.3 GRS 1758-258 273.9525 -13.9500 3.0 23.7 86.6 0.8665 3.8 6.0 GX 17+2 275.9513 -30.4779 20.2 30.5 120.6 0.1605 0.6 6.8 H1820-303 285.2002 -24.8991 6.0 35.9 105.4 0.8648 1.9 9.0 HT1900.1-2455 288.7106 10.8432 6.2 45.0 50.3 1.4793 1.9 8.0 GRS 1915+105 262.8682 -33.9744 5.5 25.0 142.7 0.4129 2.1 10.3 GX 354-0 258.9794 -6.9535 3.0 10.5 51.1 0.6551 3.9 ------ UNKNOWN 265.4887 42.3615 2.1 56.3 3.3 5.2752 5.5 ------ UNKNOWN 255.2782 4.7070 2.6 17.7 8.0 0.7373 4.5 ------ UNKNOWN 203.4539 -23.6562 2.5 45.3 -122.1 3.7889 4.6 ------ UNKNOWN 201.2586 -29.0658 3.9 48.0 -129.1 2.5263 3.0 ------ UNKNOWN 203.2723 -23.1508 3.7 45.4 -121.4 2.5314 3.1 ------ UNKNOWN