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 v2.48
Process Start Time: Mon Oct 24 00:32:14 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1071993
======================================================================
Trigger: 01071993 Segment: 000
BAT Trigger Time: 652493588.992 [s; MET]
Trigger Stop: 652493591.04 [s; MET]
UTC: 2021-09-05T00:12:41.320740 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 309.061771074576 Dec: -44.4308232449456 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 9.35
Image Trigger?: NO
Rate S/N Ratio: 14.1774468787578 [ if not an image trigger ]
Image S/N Ratio: 9.35
Analysis Position: [ source = BAT ]
RA: 309.061771074576 Dec: -44.4308232449456 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 309.053929954107 Dec: -44.422884520943 [deg; J2000]
{ 20h 36m 12.9s , -44d 25' 22.4" }
+/- 1.39191504214578 [arcmin] (estimated 90% radius based on SNR)
+/- 0.49779368804662 [arcmin] (formal 1-sigma fit error)
SNR: 18.9651961891967
Angular difference between the analysis and refined position is 0.582896 arcmin
Partial Coding Fraction: 0.3398438 [ including projection effects ]
Duration
T90: 778.399999976158 +/- 388.456258305999
Measured from: -24.1679999828339
to: 754.231999993324 [s; relative to TRIGTIME]
T50: 778.399999976158 +/- 772.451878978645
Measured from: -24.1679999828339
to: 754.231999993324 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 0.860000014305115
to: 1.86000001430511 [s; relative to TRIGTIME]
Total Fluence
Measured from: -24.1679999828339
to: 754.231999993324 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 1.988747 2.460124 1.981204 0.592613
0.253675 0.262208 0.233648 0.214448 [error]
Peak 0.051211 0.073651 0.095822 0.038042
0.013264 0.014568 0.012762 0.010112 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 778.400 -24.168 754.232
T90 778.400 -24.168 754.232
T50 778.400 -24.168 754.232
Peak 1.000 0.860 1.860
====== 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: 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 -1.512 -0.194 0.192 - - - 5.81e-04 -6.84e-05 6.79e-05 56.860 57
CPL -0.974 -0.628 0.887 90.413 -32.022 -90.413 1.12e-03 -5.82e-04 2.11e-03 55.350 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 -0.973 -0.299 0.323 - - - 1.58e-02 -2.88e-03 2.82e-03 49.080 57
CPL -0.866 -0.404 1.143 645.377 -645.377 -645.377 1.75e-02 -4.33e-03 2.92e-02 49.120 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 5.84e-07 1.07e-06 1.49e-06 4.39e-06 4.28e-06 7.53e-06 erg/cm2
90%_error_low -1.05e-07 -1.24e-07 -2.28e-07 -1.26e-06 -5.50e-07 -1.47e-06 erg/cm2
90%_error_hi 1.09e-07 1.23e-07 2.28e-07 1.56e-06 5.57e-07 1.73e-06 erg/cm2
Peak flux PL 3.93e-01 5.43e-01 5.53e-01 1.03e+00 1.82e+00 2.51e+00 ph/cm2/s
90%_error_low -1.42e-01 -1.31e-01 -9.63e-02 -3.44e-01 -3.34e-01 -4.39e-01 ph/cm2/s
90%_error_hi 1.65e-01 1.28e-01 9.55e-02 4.47e-01 3.37e-01 4.53e-01 ph/cm2/s
Fluence CPL 5.43e-07 1.13e-06 1.52e-06 1.92e-06 4.08e-06 5.12e-06 erg/cm2
90%_error_low -1.22e-07 -1.56e-07 -2.48e-07 -1.24e-06 -6.15e-07 -1.40e-06 erg/cm2
90%_error_hi 1.23e-07 1.62e-07 2.50e-07 2.95e-06 6.23e-07 3.04e-06 erg/cm2
Peak flux CPL 3.95e-01 5.43e-01 5.53e-01 1.03e+00 1.82e+00 2.52e+00 ph/cm2/s
90%_error_low -1.85e-01 -1.31e-01 -9.58e-02 -6.34e-01 -3.43e-01 -7.68e-01 ph/cm2/s
90%_error_hi 1.15e-01 1.31e-01 1.25e-01 4.29e-01 3.36e-01 4.06e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 309.0539 -44.4229 0.0101 32.9728 54.4855 3.8119101 18.965 TRIG_01071993 Foreground time interval of the image: -24.168 27.309 (delta_t = 51.477 [sec]) Background time interval of the image: -239.992 -24.168 (delta_t = 215.824 [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 -24.168 sec. to 754.232 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.51194 ( -0.193847 0.19203 ) Norm@50keV : 5.80858E-04 ( -6.83971e-05 6.78568e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 56.86 using 59 bins. Reduced chi-squared = 0.997544 # Null hypothesis probability of 4.80e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 778.4 sec: 7.27510E-02 ( -0.0082735 0.0082814 ) ph/cm2/s Energy fluence (15-150 keV) : 4.28157e-06 ( -5.49556e-07 5.56846e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -24.168 sec. to 754.232 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.974494 ( -0.628387 0.886903 ) Epeak [keV] : 90.4134 ( -32.0228 -90.4143 ) Norm@50keV : 1.11878E-03 ( -0.000582038 0.00210867 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 55.35 using 59 bins. Reduced chi-squared = 0.988393 # Null hypothesis probability of 5.00e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 778.4 sec: 7.12245E-02 ( -0.0085652 0.0085508 ) ph/cm2/s Energy fluence (15-150 keV) : 4.07702e-06 ( -6.15211e-07 6.23144e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 0.860 sec. to 1.860 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.973056 ( -0.299061 0.322939 ) Norm@50keV : 1.58033E-02 ( -0.0028848 0.00281555 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 49.08 using 59 bins. Reduced chi-squared = 0.861053 # Null hypothesis probability of 7.63e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.81712 ( -0.3337 0.33668 ) ph/cm2/s Energy fluence (15-150 keV) : 1.72568e-07 ( -3.00663e-08 3.01209e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.860 sec. to 1.860 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.966644 ( -0.393493 1.15341 ) Epeak [keV] : 9998.71 ( -9998.71 -9998.71 ) Norm@50keV : 1.59009E-02 ( -0.00270481 0.0308711 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 49.08 using 59 bins. Reduced chi-squared = 0.876429 # Null hypothesis probability of 7.32e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.81785 ( -0.34314 0.33566 ) ph/cm2/s Energy fluence (15-150 keV) : 2.21243e-08 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = N/A sec. Hardness ratio (energy fluence ratio) = N/A
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = N/A S(50-150 keV) = N/A
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 = 3.768542499992261E-01, IMY = -5.280474768247337E-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: -239.992000 -24.168000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.0713 -60.5961 14.2 38.3 -103.5 0.7185 0.8 7.4 Cen X-3 186.6478 -62.7684 0.8 33.6 -92.2 6.8538 13.7 0.3 GX 301-2 256.1290 -37.8431 33.2 42.5 -11.2 0.1334 0.3 6.7 4U 1700-377 256.3925 -36.4379 7.5 43.9 -10.5 0.6403 1.6 2.3 GX 349+2 263.0780 -24.6921 13.3 54.4 -0.3 -0.7140 -0.9 4.9 GX 1+4 264.9059 -44.3913 5.6 34.8 -3.0 -0.6328 -2.1 7.8 4U 1735-44 270.2333 -25.1158 5.2 53.2 7.6 1.8114 2.2 3.5 GX 5-1 270.2808 -25.7419 3.6 52.5 7.6 2.3344 3.2 1.2 GRS 1758-258 275.9810 -30.4144 13.6 47.3 13.4 0.4491 0.9 4.1 H1820-303 285.1952 -24.9315 6.9 52.2 24.7 1.8737 1.7 8.7 HT1900.1-2455 263.1193 -33.8529 5.3 45.4 -2.1 -1.0236 -2.2 6.6 GX 354-0 3.5473 -52.0283 2.8 35.0 121.9 1.9714 4.1 ------ UNKNOWN 304.5839 -53.6105 2.9 23.5 50.2 1.1915 4.0 ------ UNKNOWN 60.5213 -45.8321 3.3 52.6 170.5 3.0632 3.5 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -24.168000 27.308600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.5611 -60.6580 5.7 38.2 -103.2 0.5762 2.0 7.5 Cen X-3 186.8020 -62.6311 3.4 33.7 -92.0 0.6939 3.4 9.3 GX 301-2 256.0212 -37.6934 5.2 42.7 -11.3 0.3830 2.2 9.2 4U 1700-377 256.3516 -36.4816 4.6 43.8 -10.6 -0.4377 -2.5 5.4 GX 349+2 262.9171 -24.7798 4.8 54.4 -0.5 -0.9289 -2.4 5.4 GX 1+4 264.6775 -44.4998 4.0 34.7 -3.3 -0.4046 -2.9 4.1 4U 1735-44 270.1547 -25.0206 5.8 53.3 7.6 0.7599 2.0 7.9 GX 5-1 270.2465 -25.7506 27.0 52.5 7.6 -0.1521 -0.4 3.1 GRS 1758-258 276.0212 -30.4882 6.0 47.2 13.5 -0.4807 -1.9 8.8 H1820-303 284.9479 -24.9875 7.1 52.1 24.4 0.8212 1.6 6.3 HT1900.1-2455 263.0702 -33.9380 8.8 45.3 -2.2 0.2666 1.3 7.4 GX 354-0 309.0539 -44.4229 0.6 33.0 54.5 3.8120 19.0 ------ UNKNOWN 298.0850 -41.7917 2.0 35.1 39.9 1.1575 5.7 ------ UNKNOWN 269.9521 -56.0024 2.4 22.7 -1.9 0.5351 4.8 ------ UNKNOWN 253.0708 -21.6706 2.5 58.9 -10.5 3.1832 4.7 ------ UNKNOWN 239.5985 -47.9374 2.0 36.0 -33.9 0.9162 5.9 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 80.508590 408.508600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 255.8049 -37.8900 12.3 39.9 -59.1 0.7669 0.9 9.0 4U 1700-377 256.4317 -36.3599 14.6 40.2 -56.6 0.6443 0.8 3.8 GX 349+2 262.9701 -24.6122 17.9 42.1 -37.0 -0.4362 -0.6 8.3 GX 1+4 264.9633 -44.5510 0.0 31.0 -65.4 -0.9024 -1.7 11.2 4U 1735-44 268.2693 -1.4194 6.0 56.1 -11.3 -2.2286 -1.9 6.2 SW J1753.5-0127 270.4505 -25.1707 0.0 36.6 -30.6 0.2121 0.4 10.6 GX 5-1 270.3901 -25.8647 24.6 36.2 -31.6 0.2366 0.5 8.7 GRS 1758-258 273.9539 -14.0213 6.7 42.6 -14.9 0.9610 1.7 3.2 GX 17+2 276.0954 -30.3837 8.5 29.4 -32.1 0.6250 1.4 8.9 H1820-303 284.9445 -24.8394 9.2 27.7 -12.3 -0.4770 -1.3 7.0 HT1900.1-2455 263.1575 -33.8645 23.6 36.6 -48.7 0.3135 0.5 8.6 GX 354-0 13.2436 -37.5502 3.3 47.7 145.8 4.5954 3.4 ------ UNKNOWN 263.7007 -6.7356 3.1 54.5 -19.6 4.2174 3.7 ------ UNKNOWN 242.4253 -62.6868 2.4 41.2 -99.7 7.1813 4.9 ------ UNKNOWN