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: Fri Jul 29 22:56:29 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1058804
======================================================================
Trigger: 01058804 Segment: 000
BAT Trigger Time: 646945660.992 [s; MET]
Trigger Stop: 646945662.016 [s; MET]
UTC: 2021-07-02T19:07:13.691440 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 168.569805415435 Dec: -36.741422872714 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.99
Image Trigger?: NO
Rate S/N Ratio: 95.0683964312011 [ if not an image trigger ]
Image S/N Ratio: 6.99
Analysis Position: [ source = BAT ]
RA: 168.569805415435 Dec: -36.741422872714 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: Dec: [deg; J2000]
{ 00h 00m 00.0s , +00d 00' 00.0" }
+/- -inf [arcmin] (estimated 90% radius based on SNR)
+/- 0 [arcmin] (formal 1-sigma fit error)
SNR:
Angular difference between the analysis and refined position is -2294.259716 arcmin
Partial Coding Fraction: 0 [ including projection effects ]
Duration
T90: 219.472000002861 +/- 107.885813586686
Measured from: 21.3040000200272
to: 240.776000022888 [s; relative to TRIGTIME]
T50: 75.0240000486374 +/- 10.417965992171
Measured from: 32.0080000162125
to: 107.03200006485 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 18.8600000143051
to: 19.8600000143051 [s; relative to TRIGTIME]
Total Fluence
Measured from: -172.664000034332
to: 369.223999977112 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 4.242075 5.370142 4.576352 0.937078
0.206592 0.223140 0.212829 0.226641 [error]
Peak 0.140575 0.257883 0.109094 0.092551
0.057177 0.065435 0.058659 0.063745 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 373.380 -3.648 369.732
T90 163.952 -2.452 161.500
T50 35.916 1.060 36.976
Peak 1.000 0.644 1.644
====== 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 -1.534 -0.090 0.089 - - - 2.97e-03 -1.42e-04 1.42e-04 60.690 57
CPL -1.436 -0.178 0.350 300.137 -300.137 -300.137 3.31e-03 -4.69e-04 1.52e-03 60.430 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 N/A N/A N/A - - - N/A N/A N/A N/A N/A
CPL N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
=== 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 1.38e-06 2.48e-06 3.42e-06 9.82e-06 9.85e-06 1.71e-05 erg/cm2
90%_error_low -1.17e-07 -1.24e-07 -2.18e-07 -1.33e-06 -5.15e-07 -1.49e-06 erg/cm2
90%_error_hi 1.21e-07 1.23e-07 2.17e-07 1.46e-06 5.18e-07 1.60e-06 erg/cm2
Peak flux PL N/A N/A N/A N/A N/A N/A ph/cm2/s
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name Foreground time interval of the image: -3.648 12.909 (delta_t = 16.557 [sec]) Background time interval of the image: -172.291 -3.648 (delta_t = 168.643 [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 18.008 sec. to 369.732 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.53439 ( -0.0896471 0.0889584 ) Norm@50keV : 2.96785E-03 ( -0.000142259 0.000141633 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 60.69 using 59 bins. Reduced chi-squared = 1.06474 # Null hypothesis probability of 3.44e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 351.7 sec: 0.374047 ( -0.018174 0.018228 ) ph/cm2/s Energy fluence (15-150 keV) : 9.85013e-06 ( -5.15174e-07 5.18044e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 18.008 sec. to 369.732 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.43635 ( -0.177836 0.349967 ) Epeak [keV] : 300.137 ( -299.576 -299.576 ) Norm@50keV : 3.30943E-03 ( -0.000469625 0.00151883 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 60.43 using 59 bins. Reduced chi-squared = 1.07911 # Null hypothesis probability of 3.19e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 351.7 sec: 0.371628 ( -0.019827 0.019715 ) ph/cm2/s Energy fluence (15-150 keV) : 9.77469e-06 ( -5.74386e-07 5.55595e-07 ) ergs/cm2
1-s peak spectrum fit
1-s peak spectrum unavailable, likely because there are no event data in the 1-s peak range.
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 = -1.623204297746111E+00, IMY = 6.593911883587135E-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: -172.291400 -3.648000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.9990 -15.6146 1.6 41.8 109.4 7.2666 7.3 1.9 Sco X-1 254.4577 35.1544 5.8 47.8 33.6 1.5581 2.0 11.3 Her X-1 251.4798 4.5471 4.4 40.7 77.1 3.1616 2.6 ------ UNKNOWN 192.4702 -45.7921 3.1 57.0 178.9 4.6617 3.7 ------ UNKNOWN 190.4072 -34.7722 3.0 47.6 -173.4 1.8783 3.9 ------ UNKNOWN 186.2093 -22.9839 2.9 39.8 -159.5 1.4628 4.0 ------ UNKNOWN 176.7253 -44.2689 2.3 61.3 -169.0 17.9352 5.0 ------ UNKNOWN 217.7764 69.4527 3.2 60.8 -13.3 10.2881 3.7 ------ UNKNOWN 163.8974 -19.1437 2.7 53.9 -137.7 8.3364 4.4 ------ UNKNOWN 171.2035 48.5257 2.4 51.7 -48.6 10.0079 4.7 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -3.648000 12.908600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.7869 -15.7319 0.0 41.7 109.7 0.2919 0.8 12.4 Sco X-1 254.3240 35.2569 6.8 47.7 33.4 -0.3943 -1.7 8.3 Her X-1 239.1349 -37.0244 3.0 53.0 135.4 4.0591 3.8 ------ UNKNOWN 241.4274 -24.1833 2.4 44.6 122.3 3.0642 4.8 ------ UNKNOWN 257.9979 38.8281 2.7 51.8 30.6 1.9371 4.3 ------ UNKNOWN 168.5490 -36.7342 0.7 60.3 -157.9 25.8634 17.3 ------ UNKNOWN 171.1502 -5.5525 2.2 42.0 -124.7 1.2676 5.1 ------ UNKNOWN 183.9056 66.6395 2.5 60.7 -28.0 5.1373 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 84.708600 361.508600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.5370 -40.5560 1.5 26.0 -140.7 3.1381 7.7 0.4 Vela X-1 170.3517 -60.5766 3.7 23.9 145.9 1.3693 3.1 3.0 Cen X-3 186.6683 -62.8408 1.8 28.4 130.7 3.3216 6.6 4.2 GX 301-2 152.4683 -58.2594 2.5 24.0 169.1 1.9776 4.6 ------ UNKNOWN 168.5958 -36.7539 0.9 0.0 -176.3 4.9555 13.4 ------ UNKNOWN 97.5560 -49.8100 4.3 51.3 -160.6 2.4509 2.7 ------ UNKNOWN 82.1665 -50.8233 4.5 60.3 -165.5 8.0481 2.6 ------ UNKNOWN 181.4844 18.7822 3.6 56.8 -17.4 4.6622 3.2 ------ UNKNOWN 170.8096 7.3253 3.0 44.1 -28.9 2.6095 3.9 ------ UNKNOWN 157.6324 3.3891 3.3 41.4 -48.7 2.7167 3.5 ------ UNKNOWN 99.6412 -40.6720 3.4 52.6 -148.9 3.7052 3.4 ------ UNKNOWN 102.3049 -31.8491 2.8 53.9 -137.7 12.8419 4.1 ------ UNKNOWN