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: Sun Oct 23 23:41:18 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1093860
======================================================================
Trigger: 01093860 Segment: 000
BAT Trigger Time: 666916168 [s; MET]
Trigger Stop: 666916232 [s; MET]
UTC: 2022-02-18T22:28:59.357780 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 133.830146896997 Dec: 31.9839890538763 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 10.61
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 10.61
Analysis Position: [ source = BAT ]
RA: 133.830146896997 Dec: 31.9839890538763 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 133.812141922825 Dec: 31.9677208094888 [deg; J2000]
{ 08h 55m 14.9s , +31d 58' 03.8" }
+/- 1.56188374398342 [arcmin] (estimated 90% radius based on SNR)
+/- 0.578133124362304 [arcmin] (formal 1-sigma fit error)
SNR: 16.0870856144617
Angular difference between the analysis and refined position is 1.338852 arcmin
Partial Coding Fraction: 1.015625 [ including projection effects ]
Duration
T90: 270.840000033379 +/- 47.9247395934346
Measured from: 43.3079999685287
to: 314.148000001907 [s; relative to TRIGTIME]
T50: 131.939999938011 +/- 14.978436804039
Measured from: 87.904000043869
to: 219.84399998188 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 183.240000009537
to: 184.240000009537 [s; relative to TRIGTIME]
Total Fluence
Measured from: 25.404000043869
to: 366.603999972343 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.547016 2.764212 1.823480 0.442707
0.131602 0.135573 0.117726 0.101643 [error]
Peak 0.027993 0.040609 0.021192 0.011073
0.007440 0.007518 0.007061 0.005954 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 341.200 25.404 366.604
T90 270.840 43.308 314.148
T50 131.940 87.904 219.844
Peak 1.000 183.240 184.240
====== 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 -1.749 -0.108 0.106 - - - 1.32e-03 -8.14e-05 8.07e-05 46.270 57
CPL -1.595 -0.248 0.426 123.127 -60.128 -123.127 1.60e-03 -3.46e-04 1.05e-03 45.830 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 -1.668 -0.437 0.411 - - - 5.70e-03 -1.56e-03 1.50e-03 62.110 57
CPL -1.556 -1.026 5.883 150.133 -150.133 -150.133 6.67e-03 -6.67e-03 4.46e+01 62.120 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 7.29e-07 1.15e-06 1.37e-06 3.17e-06 4.17e-06 6.42e-06 erg/cm2
90%_error_low -6.65e-08 -6.44e-08 -1.16e-07 -5.34e-07 -2.66e-07 -6.40e-07 erg/cm2
90%_error_hi 6.82e-08 6.44e-08 1.16e-07 6.06e-07 2.68e-07 6.96e-07 erg/cm2
Peak flux PL 2.76e-01 2.51e-01 1.58e-01 1.52e-01 7.49e-01 8.38e-01 ph/cm2/s
90%_error_low -9.23e-02 -5.77e-02 -5.50e-02 -8.31e-02 -1.71e-01 -2.00e-01 ph/cm2/s
90%_error_hi 9.76e-02 5.76e-02 5.61e-02 1.31e-01 1.71e-01 2.05e-01 ph/cm2/s
Fluence CPL 7.13e-07 1.17e-06 1.37e-06 2.43e-06 4.10e-06 5.68e-06 erg/cm2
90%_error_low -7.84e-08 -7.70e-08 -1.19e-07 -1.15e-06 -3.12e-07 -1.20e-06 erg/cm2
90%_error_hi 7.39e-08 8.01e-08 1.20e-07 8.82e-07 3.11e-07 1.37e-06 erg/cm2
Peak flux CPL 2.75e-01 2.53e-01 1.58e-01 1.41e-01 7.48e-01 8.16e-01 ph/cm2/s
90%_error_low -1.01e-01 -5.91e-02 -5.47e-02 -1.41e-01 -2.00e-01 -2.68e-01 ph/cm2/s
90%_error_hi 9.80e-02 1.25e-01 5.69e-02 8.00e-02 1.73e-01 2.23e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 133.8121 31.9677 0.0120 13.1836 19.0118 5.9715616 16.087 TRIG_01093860 Foreground time interval of the image: 25.404 366.604 (delta_t = 341.200 [sec]) Background time interval of the image: -239.000 25.404 (delta_t = 264.404 [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 25.404 sec. to 366.604 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.74904 ( -0.10782 0.106138 ) Norm@50keV : 1.32357E-03 ( -8.14243e-05 8.06801e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 46.27 using 59 bins. Reduced chi-squared = 0.811754 # Null hypothesis probability of 8.44e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 341.2 sec: 0.178914 ( -0.010132 0.010151 ) ph/cm2/s Energy fluence (15-150 keV) : 4.16793e-06 ( -2.65823e-07 2.68454e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 25.404 sec. to 366.604 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.59489 ( -0.247881 0.425957 ) Epeak [keV] : 123.127 ( -60.1284 -123.127 ) Norm@50keV : 1.59656E-03 ( -0.000345988 0.00105177 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 45.83 using 59 bins. Reduced chi-squared = 0.818393 # Null hypothesis probability of 8.32e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 341.2 sec: 0.177292 ( -0.010929 0.010914 ) ph/cm2/s Energy fluence (15-150 keV) : 4.10269e-06 ( -3.12344e-07 3.10564e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 183.240 sec. to 184.240 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.66808 ( -0.437334 0.411371 ) Norm@50keV : 5.70302E-03 ( -0.00156235 0.0014979 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 62.11 using 59 bins. Reduced chi-squared = 1.08965 # Null hypothesis probability of 2.99e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.749203 ( -0.171452 0.171453 ) ph/cm2/s Energy fluence (15-150 keV) : 5.29578e-08 ( -1.48442e-08 1.561e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 183.240 sec. to 184.240 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.55562 ( -1.00256 5.90668 ) Epeak [keV] : 150.133 ( -211.447 -211.447 ) Norm@50keV : 6.66797E-03 ( -0.0062089 44.5662 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 62.12 using 59 bins. Reduced chi-squared = 1.10929 # Null hypothesis probability of 2.67e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.747865 ( -0.199512 0.172734 ) ph/cm2/s Energy fluence (15-150 keV) : 5.26393e-08 ( -2.45106e-08 1.57597e-08 ) 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 = 2.214689011210084E-01, IMY = -7.630873196229848E-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: -239.000000 25.404000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6436 22.0083 0.9 36.6 -107.0 10.7128 13.5 0.7 Crab 91.6639 12.2427 3.3 31.8 -127.5 1.7310 3.5 ------ UNKNOWN 88.8389 7.7731 2.8 36.3 -132.6 2.2338 4.1 ------ UNKNOWN 121.8695 79.5268 2.3 56.9 -24.1 8.7095 5.1 ------ UNKNOWN 91.1068 71.1391 2.9 51.9 -36.5 6.0094 4.0 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 25.404000 366.604000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6541 21.9774 5.3 36.6 -107.1 1.8453 2.2 2.5 Crab 133.8121 31.9677 0.7 13.2 19.0 5.9715 16.1 ------ UNKNOWN 135.1752 65.0662 1.9 43.1 -16.5 3.8441 6.1 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 744.500610 963.102200 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9660 -15.6305 1.0 32.8 75.4 6.7615 12.1 1.0 Sco X-1 254.3690 35.3152 8.1 52.6 150.7 2.1973 1.4 4.6 Her X-1 256.1161 -38.0301 0.0 32.8 29.3 -0.4451 -0.9 12.7 4U 1700-377 256.4683 -36.4962 14.2 31.5 31.0 0.3692 0.8 4.7 GX 349+2 263.0663 -24.8142 12.2 19.5 42.4 -0.3178 -0.9 5.2 GX 1+4 264.6543 -44.3601 4.0 34.5 13.3 1.2741 2.9 6.6 4U 1735-44 268.3724 -1.4441 179.1 14.6 131.1 -0.0211 -0.1 0.6 SW J1753.5-0127 270.2026 -24.9187 21.8 15.1 26.0 0.1532 0.5 10.6 GX 5-1 270.1313 -25.8721 10.2 16.0 24.3 0.3289 1.1 12.1 GRS 1758-258 273.8441 -14.1055 9.5 5.1 60.6 -0.3651 -1.2 10.3 GX 17+2 275.9219 -30.3705 16.2 18.5 2.9 0.2333 0.7 0.3 H1820-303 285.1916 -25.0265 12.6 14.5 -29.1 -0.2897 -0.9 10.6 HT1900.1-2455 288.7847 10.9437 21.6 25.1 -160.1 0.1712 0.5 0.8 GRS 1915+105 299.5992 35.1998 1.1 51.2 -162.2 7.9103 10.2 0.5 Cyg X-1 308.1447 40.9203 9.0 59.6 -158.7 -3.3608 -1.3 2.5 Cyg X-3 262.9629 -33.7687 4.8 26.0 26.3 0.8452 2.4 4.2 GX 354-0 299.0015 15.9368 2.9 34.5 -148.0 1.6307 3.9 ------ UNKNOWN 299.0269 38.2628 3.8 53.8 -164.5 2.7250 3.0 ------ UNKNOWN 322.2335 -32.3400 2.8 44.8 -60.2 5.9867 4.1 ------ UNKNOWN