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: Sat Jul 30 00:12:17 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1032024
======================================================================
Trigger: 01032024 Segment: 000
BAT Trigger Time: 634725824.832 [s; MET]
Trigger Stop: 634725825.344 [s; MET]
UTC: 2021-02-11T08:43:18.344500 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 269.432936029963 Dec: -46.2994226377339 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.09
Image Trigger?: NO
Rate S/N Ratio: 13.7477270848675 [ if not an image trigger ]
Image S/N Ratio: 7.09
Analysis Position: [ source = BAT ]
RA: 269.432936029963 Dec: -46.2994226377339 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 269.423171644191 Dec: -46.2715233460588 [deg; J2000]
{ 17h 57m 41.6s , -46d 16' 17.5" }
+/- 1.57711598100587 [arcmin] (estimated 90% radius based on SNR)
+/- 0.752650570265979 [arcmin] (formal 1-sigma fit error)
SNR: 15.8655834548919
Angular difference between the analysis and refined position is 1.722223 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 451.299999952316 +/- 203.99098611231
Measured from: 3.49599993228912
to: 454.795999884605 [s; relative to TRIGTIME]
T50: 277.483999967575 +/- 218.84366391102
Measured from: 3.82799994945526
to: 281.31199991703 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 4.27999997138977
to: 5.27999997138977 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.700000047683716
to: 515.34399998188 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.400637 0.568338 0.484112 0.030754
0.154272 0.146249 0.122979 0.105043 [error]
Peak 0.030921 0.052662 0.040460 0.014544
0.007388 0.007423 0.006594 0.005316 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 516.044 -0.700 515.344
T90 451.300 3.496 454.796
T50 277.484 3.828 281.312
Peak 1.000 4.280 5.280
====== 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 -1.260 -0.430 0.448 - - - 2.03e-04 -5.16e-05 5.16e-05 75.870 57
CPL -0.007 -1.119 3.596 83.528 -31.179 -83.528 8.03e-04 -8.03e-04 2.86e-02 74.680 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 -1.252 -0.276 0.281 - - - 8.75e-03 -1.38e-03 1.37e-03 46.840 57
CPL -0.965 -1.095 1.301 187.198 -187.198 -187.198 1.21e-02 -4.63e-03 3.82e-02 46.630 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-07 2.27e-07 3.79e-07 1.44e-06 1.04e-06 2.16e-06 erg/cm2
90%_error_low -4.63e-08 -6.64e-08 -1.15e-07 -7.54e-07 -2.87e-07 -8.62e-07 erg/cm2
90%_error_hi 5.33e-08 6.48e-08 1.14e-07 1.21e-06 2.93e-07 1.24e-06 erg/cm2
Peak flux PL 2.84e-01 3.32e-01 2.78e-01 3.95e-01 1.04e+00 1.29e+00 ph/cm2/s
90%_error_low -8.09e-02 -6.07e-02 -5.23e-02 -1.37e-01 -1.67e-01 -2.11e-01 ph/cm2/s
90%_error_hi 8.83e-02 5.94e-02 5.15e-02 1.78e-01 1.67e-01 2.16e-01 ph/cm2/s
Fluence CPL 8.23e-08 2.50e-07 4.11e-07 3.58e-07 9.57e-07 1.10e-06 erg/cm2
90%_error_low -4.32e-08 -7.85e-08 -1.35e-07 -3.13e-07 -3.08e-07 -4.45e-07 erg/cm2
90%_error_hi 6.47e-08 8.36e-08 1.40e-07 1.40e-06 3.24e-07 1.46e-06 erg/cm2
Peak flux CPL 2.69e-01 3.40e-01 2.86e-01 2.82e-01 1.02e+00 1.18e+00 ph/cm2/s
90%_error_low -9.84e-02 -6.65e-02 -5.76e-02 -2.82e-01 -1.74e-01 -2.78e-01 ph/cm2/s
90%_error_hi 1.00e-01 7.06e-02 6.07e-02 1.54e-01 1.73e-01 3.08e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 269.4232 -46.2715 0.0121 14.5976 -22.5331 0.7210388 15.866 TRIG_01032024 Foreground time interval of the image: -0.700 11.669 (delta_t = 12.369 [sec]) Background time interval of the image: -239.832 -0.700 (delta_t = 239.132 [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 -0.700 sec. to 515.344 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.26024 ( -0.430438 0.447912 ) Norm@50keV : 2.02674E-04 ( -5.16483e-05 5.16477e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 75.87 using 59 bins. Reduced chi-squared = 1.33105 # Null hypothesis probability of 4.80e-02 with 57 degrees of freedom Photon flux (15-150 keV) in 516 sec: 2.40116E-02 ( -0.0063166 0.0063667 ) ph/cm2/s Energy fluence (15-150 keV) : 1.04395e-06 ( -2.87101e-07 2.9289e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.700 sec. to 515.344 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.00671053 ( -1.11867 3.59608 ) Epeak [keV] : 83.5282 ( -31.1791 -83.5281 ) Norm@50keV : 8.03397E-04 ( -0.0008034 0.0286119 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 74.68 using 59 bins. Reduced chi-squared = 1.33357 # Null hypothesis probability of 4.83e-02 with 56 degrees of freedom Photon flux (15-150 keV) in 516 sec: 2.26189E-02 ( -0.0068623 0.0067549 ) ph/cm2/s Energy fluence (15-150 keV) : 9.56974e-07 ( -3.07906e-07 3.2394e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 4.280 sec. to 5.280 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.25223 ( -0.275718 0.281164 ) Norm@50keV : 8.75462E-03 ( -0.00137561 0.00137392 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 46.84 using 59 bins. Reduced chi-squared = 0.821754 # Null hypothesis probability of 8.29e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.03582 ( -0.166569 0.16703 ) ph/cm2/s Energy fluence (15-150 keV) : 8.7575e-08 ( -1.53013e-08 1.55063e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 4.280 sec. to 5.280 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.964943 ( -1.09469 1.30084 ) Epeak [keV] : 187.198 ( -187.233 -187.233 ) Norm@50keV : 1.21137E-02 ( -0.00462884 0.0382054 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 46.63 using 59 bins. Reduced chi-squared = 0.832679 # Null hypothesis probability of 8.10e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 1.02296 ( -0.17406 0.17304 ) ph/cm2/s Energy fluence (15-150 keV) : 3.13466e-08 ( -7.69176e-09 8.07915e-09 ) 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 = 2.405527487595046E-01, IMY = 9.980326310323284E-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: -239.832000 -0.700000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9846 -15.6233 0.6 24.0 121.8 7.1978 17.8 1.1 Sco X-1 255.9974 -37.8247 3.7 8.6 40.0 0.8184 3.1 1.3 4U 1700-377 256.2472 -36.4178 4.9 7.7 47.4 0.6514 2.4 9.1 GX 349+2 262.8707 -24.5765 0.0 7.8 164.5 0.2425 0.8 12.6 GX 1+4 264.9737 -44.3190 0.0 12.1 -10.8 0.1694 0.6 12.6 4U 1735-44 268.5005 -1.4228 8.5 31.1 -179.0 0.4791 1.4 8.1 SW J1753.5-0127 270.2886 -25.0874 34.1 9.0 -148.7 -0.0884 -0.3 0.5 GX 5-1 270.3019 -25.7435 3.1 8.5 -146.1 0.9992 4.0 0.0 GRS 1758-258 274.1543 -13.9859 10.5 20.5 -158.5 0.3242 1.1 9.2 GX 17+2 275.8656 -30.4714 3.0 10.2 -104.6 1.0840 3.8 7.0 H1820-303 285.0505 -24.8083 1588.3 19.9 -114.3 -0.0022 -0.0 6.8 HT1900.1-2455 288.9019 11.0061 17.5 49.4 -154.7 -0.4385 -0.7 7.1 GRS 1915+105 263.0050 -33.8424 6.4 1.8 21.1 0.4891 1.8 0.9 GX 354-0 255.7311 -48.7896 1.0 17.7 10.7 3.1557 11.4 ------ UNKNOWN 283.5002 6.8306 2.9 43.3 -158.8 2.1003 4.0 ------ UNKNOWN 311.0660 -68.0109 3.1 44.7 -30.6 1.8400 3.8 ------ UNKNOWN 306.0144 -11.3015 3.0 43.9 -116.5 4.8100 3.8 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.700000 11.668600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0939 -15.5213 5.6 24.0 122.1 0.1161 2.1 9.7 Sco X-1 256.1435 -37.9789 7.6 8.6 38.7 -0.0668 -1.5 11.0 4U 1700-377 256.2406 -36.4433 8.1 7.7 47.3 -0.0618 -1.4 9.5 GX 349+2 262.9701 -24.5892 5.2 7.7 165.1 -0.0938 -2.2 9.6 GX 1+4 264.6571 -44.5935 4.7 12.3 -9.7 -0.1037 -2.4 9.4 4U 1735-44 268.3841 -1.3915 10.0 31.1 -179.2 -0.0611 -1.2 3.8 SW J1753.5-0127 270.3035 -24.9306 57.8 9.2 -149.3 -0.0085 -0.2 9.0 GX 5-1 270.1505 -25.5812 0.0 8.6 -147.5 0.0575 1.4 12.7 GRS 1758-258 273.8662 -13.8830 9.8 20.5 -159.3 -0.0547 -1.2 12.3 GX 17+2 276.0145 -30.4992 53.8 10.4 -104.3 0.0095 0.2 9.2 H1820-303 285.0302 -24.9206 120.3 19.8 -114.1 0.0048 0.1 0.3 HT1900.1-2455 288.8204 10.8094 73.6 49.2 -154.7 0.0156 0.2 8.3 GRS 1915+105 262.7980 -33.8842 8.3 1.9 24.9 -0.0613 -1.4 10.0 GX 354-0 269.4232 -46.2715 0.7 14.6 -22.5 0.7207 15.9 ------ UNKNOWN 280.4966 -10.6833 2.0 26.4 -148.9 0.2815 5.6 ------ UNKNOWN 294.6692 -65.3152 2.3 37.9 -27.9 0.3307 5.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 57.268610 584.668590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9794 -15.6410 0.7 36.8 154.4 14.4922 16.3 0.0 Sco X-1 256.0365 -37.9830 5.3 12.9 141.4 1.0213 2.2 8.7 4U 1700-377 256.4457 -36.3751 2.4 13.9 147.1 2.1722 4.7 2.9 GX 349+2 263.0831 -24.7941 5.2 22.1 -179.4 1.1326 2.2 5.0 GX 1+4 264.5727 -44.5938 3.9 3.8 131.0 1.3756 3.0 11.3 4U 1735-44 268.2212 -1.3769 8.5 44.9 -165.6 1.4565 1.3 9.9 SW J1753.5-0127 270.1291 -25.1024 4.0 21.2 -162.2 1.5073 2.9 8.5 GX 5-1 270.2024 -25.7212 2.6 20.6 -162.0 2.4000 4.6 5.6 GRS 1758-258 274.0791 -13.8658 0.0 32.7 -155.5 0.1352 0.2 11.1 GX 17+2 275.9781 -30.2477 3.6 16.8 -144.1 1.6514 3.2 7.7 H1820-303 285.2184 -24.9227 69.4 24.8 -128.0 0.1050 0.2 9.9 HT1900.1-2455 263.1003 -33.9149 4.1 13.3 172.6 1.4611 2.8 7.3 GX 354-0 236.6940 -8.7460 2.5 46.8 149.0 7.4368 4.7 ------ UNKNOWN 261.2347 -73.9514 2.9 27.9 21.0 2.3237 4.0 ------ UNKNOWN 255.6862 -48.7888 1.1 9.6 86.1 6.0284 10.7 ------ UNKNOWN 31.7677 -72.5233 3.3 54.6 -2.0 6.1507 3.5 ------ UNKNOWN 353.3590 -76.6537 2.1 43.9 -3.2 4.8055 5.4 ------ UNKNOWN 262.7853 3.2500 3.0 49.9 -172.6 4.6339 3.9 ------ UNKNOWN 1.6548 -68.4817 3.4 48.5 -13.2 3.6826 3.4 ------ UNKNOWN