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 23:22:13 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1104343
======================================================================
Trigger: 01104343 Segment: 000
BAT Trigger Time: 672786064 [s; MET]
Trigger Stop: 672786136 [s; MET]
UTC: 2022-04-27T21:00:34.960900 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 275.868924241971 Dec: -56.2528968519053 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 11.95
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 11.95
Analysis Position: [ source = BAT ]
RA: 275.868924241971 Dec: -56.2528968519053 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 275.920651239479 Dec: -56.2569768200509 [deg; J2000]
{ 18h 23m 41.0s , -56d 15' 25.1" }
+/- 2.02985056108217 [arcmin] (estimated 90% radius based on SNR)
+/- 0.756551948003623 [arcmin] (formal 1-sigma fit error)
SNR: 11.0632824417027
Angular difference between the analysis and refined position is 1.741349 arcmin
Partial Coding Fraction: 0.625 [ including projection effects ]
Duration
T90: 57.2159999608994 +/- 12.3112907433403
Measured from: 5.77199995517731
to: 62.9879999160767 [s; relative to TRIGTIME]
T50: 17.7039999961853 +/- 3.9565419715758
Measured from: 8.20799994468689
to: 25.9119999408722 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.81599998474121
to: 8.81599998474121 [s; relative to TRIGTIME]
Total Fluence
Measured from: 3.09200000762939
to: 68.9199999570847 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.624333 1.063668 0.962308 0.355258
0.078001 0.074151 0.064987 0.058180 [error]
Peak 0.074046 0.134366 0.118165 0.055787
0.010863 0.011338 0.010556 0.009520 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 65.828 3.092 68.920
T90 57.216 5.772 62.988
T50 17.704 8.208 25.912
Peak 1.000 7.816 8.816
====== 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 -1.226 -0.130 0.132 - - - 3.13e-03 -2.26e-04 2.26e-04 58.250 57
CPL -1.143 -0.201 0.525 562.179 -562.179 -562.179 3.42e-03 -4.69e-04 2.39e-03 58.180 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 -1.159 -0.161 0.164 - - - 2.53e-02 -2.29e-03 2.29e-03 62.960 57
CPL -1.157 -0.160 0.168 9999.330 -9999.330 -9999.330 2.54e-02 -2.27e-03 1.96e-02 62.960 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 2.04e-07 4.43e-07 7.58e-07 2.99e-06 2.08e-06 4.39e-06 erg/cm2
90%_error_low -2.97e-08 -3.91e-08 -6.21e-08 -5.30e-07 -1.58e-07 -5.65e-07 erg/cm2
90%_error_hi 3.12e-08 3.86e-08 6.17e-08 6.09e-07 1.58e-07 6.30e-07 erg/cm2
Peak flux PL 7.51e-01 9.27e-01 8.30e-01 1.29e+00 2.95e+00 3.79e+00 ph/cm2/s
90%_error_low -1.36e-01 -1.05e-01 -8.37e-02 -2.62e-01 -2.80e-01 -3.55e-01 ph/cm2/s
90%_error_hi 1.45e-01 1.04e-01 8.29e-02 3.04e-01 2.81e-01 3.60e-01 ph/cm2/s
Fluence CPL 2.00e-07 4.46e-07 7.64e-07 2.67e-06 2.07e-06 4.08e-06 erg/cm2
90%_error_low -3.72e-08 -3.50e-08 -6.69e-08 -1.28e-06 -1.68e-07 -1.27e-06 erg/cm2
90%_error_hi 2.99e-08 4.23e-08 7.27e-08 4.66e-07 1.60e-07 5.06e-07 erg/cm2
Peak flux CPL 7.51e-01 9.25e-01 8.28e-01 1.28e+00 2.96e+00 3.82e+00 ph/cm2/s
90%_error_low N/A -1.06e-01 -8.23e-02 N/A -2.93e-01 -6.86e-01 ph/cm2/s
90%_error_hi N/A 1.11e-01 9.53e-02 N/A 2.84e-01 3.07e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 275.9207 -56.2570 0.0173 35.1877 6.0119 3.0882933 11.063 TRIG_01104343 Foreground time interval of the image: 3.092 68.920 (delta_t = 65.828 [sec]) Background time interval of the image: -19.099 3.092 (delta_t = 22.191 [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 3.092 sec. to 68.920 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.22574 ( -0.129973 0.132221 ) Norm@50keV : 3.13265E-03 ( -0.000226373 0.000225789 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 58.25 using 59 bins. Reduced chi-squared = 1.02193 # Null hypothesis probability of 4.29e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 65.83 sec: 0.369099 ( -0.028478 0.028652 ) ph/cm2/s Energy fluence (15-150 keV) : 2.07756e-06 ( -1.57594e-07 1.58243e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.092 sec. to 68.920 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.14295 ( -0.20013 0.526285 ) Epeak [keV] : 562.179 ( -595.585 -595.585 ) Norm@50keV : 3.41696E-03 ( -0.000460652 0.00239945 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 58.18 using 59 bins. Reduced chi-squared = 1.03893 # Null hypothesis probability of 3.95e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 65.83 sec: 0.367530 ( -0.02995 0.015078 ) ph/cm2/s Energy fluence (15-150 keV) : 2.0683e-06 ( -1.68255e-07 1.60001e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 7.816 sec. to 8.816 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.15944 ( -0.16114 0.164491 ) Norm@50keV : 2.52842E-02 ( -0.00229358 0.0022872 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 62.96 using 59 bins. Reduced chi-squared = 1.10456 # Null hypothesis probability of 2.74e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 2.95203 ( -0.27975 0.2809 ) ph/cm2/s Energy fluence (15-150 keV) : 2.59579e-07 ( -2.52047e-08 2.53588e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.816 sec. to 8.816 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.15725 ( -0.160127 0.167694 ) Epeak [keV] : 9999.33 ( -9999.36 -9999.36 ) Norm@50keV : 2.53984E-02 ( -0.00228603 0.0195473 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 62.96 using 59 bins. Reduced chi-squared = 1.12429 # Null hypothesis probability of 2.44e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 2.95631 ( -0.29328 0.28404 ) ph/cm2/s Energy fluence (15-150 keV) : 1.82789e-07 ( 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 = 7.012238590859576E-01, IMY = -7.384899981152744E-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: -19.099400 3.092000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9489 -15.6606 2.1 32.2 97.6 0.7495 5.5 2.1 Sco X-1 255.8031 -37.8545 2.6 25.7 48.0 0.3979 4.4 8.7 4U 1700-377 256.5670 -36.2971 6.2 24.4 50.3 -0.1585 -1.9 9.9 GX 349+2 262.8950 -24.8857 6.1 14.8 75.9 0.1392 1.9 10.5 GX 1+4 264.7478 -44.4472 218.4 25.9 26.3 -0.0044 -0.1 0.3 4U 1735-44 268.4909 -1.5543 7.5 21.8 155.9 -0.1100 -1.5 9.6 SW J1753.5-0127 270.1203 -25.2072 7.5 8.7 63.9 0.1031 1.5 11.8 GX 5-1 270.4705 -25.8915 0.0 8.7 58.9 -0.0209 -0.3 12.7 GRS 1758-258 273.8930 -13.9161 3.1 8.4 151.8 0.2198 3.7 9.8 GX 17+2 275.8492 -30.2333 26.1 9.4 17.4 0.0299 0.4 8.9 H1820-303 285.0389 -24.9116 716.9 7.2 -53.2 -0.0010 -0.0 0.6 HT1900.1-2455 288.8870 10.8005 83.0 33.5 -157.6 0.0120 0.1 10.2 GRS 1915+105 262.8067 -33.9671 0.0 18.9 47.3 0.0635 0.9 12.1 GX 354-0 236.1256 -68.9493 2.4 54.3 20.9 1.6813 4.8 ------ UNKNOWN 255.1361 -14.5412 2.6 23.1 106.3 0.4024 4.5 ------ UNKNOWN 264.6707 -74.3191 2.4 53.7 8.2 1.1564 4.9 ------ UNKNOWN 292.2342 -46.5408 2.6 27.8 -17.0 0.3082 4.3 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 3.092000 68.920000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 245.0498 -15.5191 12.2 32.1 97.9 -0.3862 -0.9 8.3 Sco X-1 255.8055 -37.8322 3.7 25.7 48.1 -0.8226 -3.1 8.6 4U 1700-377 256.5631 -36.3194 6.4 24.4 50.3 0.4629 1.8 8.8 GX 349+2 262.8737 -24.8847 5.8 14.8 75.9 -0.4568 -2.0 11.1 GX 1+4 264.5485 -44.4794 4.5 26.0 26.6 -0.6280 -2.6 8.5 4U 1735-44 268.5090 -1.5778 4.6 21.8 155.9 0.5453 2.5 11.3 SW J1753.5-0127 270.1184 -25.0281 8.4 8.6 64.9 -0.2777 -1.4 9.5 GX 5-1 270.2692 -25.8917 8.3 8.9 59.5 0.2818 1.4 9.1 GRS 1758-258 273.8474 -13.8938 25.2 8.4 151.6 -0.0855 -0.5 12.6 GX 17+2 276.0906 -30.2558 13.6 9.4 16.1 -0.1660 -0.8 10.9 H1820-303 285.1904 -24.8219 7.1 7.2 -54.3 0.3090 1.6 10.3 HT1900.1-2455 288.6487 11.0591 6.1 33.7 -158.1 0.4495 1.9 11.1 GRS 1915+105 262.8081 -33.9361 18.3 18.8 47.4 -0.1369 -0.6 10.9 GX 354-0 275.9207 -56.2570 1.0 35.2 6.0 3.0867 11.1 ------ UNKNOWN 305.1157 5.5474 2.1 37.4 -129.0 1.8964 5.5 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 161.100600 963.101000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 170.2922 -60.6307 6.1 49.3 21.6 3.6533 1.9 0.8 Cen X-3 186.9152 -62.8911 0.0 41.8 26.1 1.5827 0.8 10.1 GX 301-2 255.9548 -37.8073 1.9 22.7 118.9 9.0169 5.9 2.7 4U 1700-377 256.5554 -36.5431 16.6 23.6 121.5 1.0777 0.7 9.2 GX 349+2 262.8377 -24.7413 42.0 32.9 140.9 0.5306 0.3 9.3 GX 1+4 264.8404 -44.6443 0.0 13.5 127.5 -0.4322 -0.4 12.4 4U 1735-44 270.2222 -24.9234 6.4 31.6 153.3 3.2366 1.8 9.9 GX 5-1 270.4590 -25.7552 22.8 30.8 153.5 -0.8732 -0.5 8.5 GRS 1758-258 274.0084 -14.0434 6.4 42.2 160.4 5.1824 1.8 0.4 GX 17+2 275.8059 -30.3744 3.4 25.9 162.9 4.5425 3.4 6.2 H1820-303 285.1536 -25.0399 4.2 31.9 179.1 -4.1283 -2.7 9.6 HT1900.1-2455 263.1549 -33.8817 8.3 24.0 136.4 2.1333 1.4 8.7 GX 354-0