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 23:34:54 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1044032
======================================================================
Trigger: 01044032 Segment: 000
BAT Trigger Time: 640508048 [s; MET]
Trigger Stop: 640508112 [s; MET]
UTC: 2021-04-19T06:53:41.128920 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 86.8619158317771 Dec: -65.5391081568672 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.15
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 8.15
Analysis Position: [ source = BAT ]
RA: 86.8619158317771 Dec: -65.5391081568672 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 86.9191773348288 Dec: -65.4532058391007 [deg; J2000]
{ 05h 47m 40.6s , -65d 27' 11.5" }
+/- 2.69991093185425 [arcmin] (estimated 90% radius based on SNR)
+/- 1.55537845599141 [arcmin] (formal 1-sigma fit error)
SNR: 7.36045900335675
Angular difference between the analysis and refined position is 5.347492 arcmin
Partial Coding Fraction: 0.6171875 [ including projection effects ]
Duration
T90: 71.0759999752045 +/- 13.780151681585
Measured from: 27.8159999847412
to: 98.8919999599457 [s; relative to TRIGTIME]
T50: 35.8959999084473 +/- 10.7951324586934
Measured from: 41.3680000305176
to: 77.2639999389648 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 41.8200000524521
to: 42.8200000524521 [s; relative to TRIGTIME]
Total Fluence
Measured from: 22.7920000553131
to: 111.424000024796 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.704768 0.657641 0.249905 0.025083
0.069778 0.071562 0.061949 0.055520 [error]
Peak 0.024392 0.026597 0.020512 0.007078
0.007874 0.008506 0.006866 0.006082 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 88.632 22.792 111.424
T90 71.076 27.816 98.892
T50 35.896 41.368 77.264
Peak 1.000 41.820 42.820
====== 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 -2.144 -0.246 0.227 - - - 1.02e-03 -1.75e-04 1.72e-04 57.680 57
CPL -1.256 -0.705 1.369 31.492 -9.375 15.644 3.59e-03 -3.59e-03 2.27e-02 55.560 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 -0.546 0.503 - - - 4.54e-03 -1.60e-03 1.54e-03 45.820 57
CPL -0.455 -1.749 3.212 58.477 -58.477 -58.477 2.08e-02 -2.08e-02 1.06e+00 44.800 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 2.11e-07 2.63e-07 2.38e-07 3.74e-07 8.40e-07 1.09e-06 erg/cm2
90%_error_low -3.26e-08 -3.32e-08 -5.44e-08 -1.42e-07 -1.26e-07 -2.18e-07 erg/cm2
90%_error_hi 3.31e-08 3.29e-08 5.69e-08 1.92e-07 1.30e-07 2.56e-07 erg/cm2
Peak flux PL 2.19e-01 2.00e-01 1.26e-01 1.21e-01 5.96e-01 6.66e-01 ph/cm2/s
90%_error_low -9.61e-02 -6.36e-02 -5.40e-02 -7.68e-02 -1.88e-01 -2.12e-01 ph/cm2/s
90%_error_hi 1.05e-01 6.33e-02 5.44e-02 1.26e-01 1.88e-01 2.15e-01 ph/cm2/s
Fluence CPL 2.02e-07 2.91e-07 2.11e-07 7.83e-08 7.61e-07 7.83e-07 erg/cm2
90%_error_low -3.59e-08 -4.58e-08 -7.64e-08 -6.68e-08 -1.34e-07 -1.54e-07 erg/cm2
90%_error_hi 3.55e-08 4.80e-08 6.97e-08 3.59e-07 1.56e-07 4.33e-07 erg/cm2
Peak flux CPL 1.89e-01 2.31e-01 1.34e-01 3.60e-02 5.81e-01 5.90e-01 ph/cm2/s
90%_error_low -1.14e-01 -8.16e-02 -6.66e-02 -3.60e-02 -1.89e-01 -1.95e-01 ph/cm2/s
90%_error_hi 1.18e-01 8.94e-02 6.57e-02 1.23e-01 1.89e-01 2.35e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 86.9192 -65.4532 0.0260 21.1227 98.4774 1.0856255 7.360 TRIG_01044032 Foreground time interval of the image: 22.792 73.901 (delta_t = 51.109 [sec]) Background time interval of the image: -15.699 22.792 (delta_t = 38.491 [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 22.792 sec. to 111.424 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.14412 ( -0.245514 0.227071 ) Norm@50keV : 1.01565E-03 ( -0.000175342 0.000171597 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 57.68 using 59 bins. Reduced chi-squared = 1.01193 # Null hypothesis probability of 4.50e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 88.63 sec: 0.163372 ( -0.019444 0.019445 ) ph/cm2/s Energy fluence (15-150 keV) : 8.40448e-07 ( -1.25868e-07 1.30175e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from 22.792 sec. to 111.424 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.25578 ( -0.70541 1.36938 ) Epeak [keV] : 31.4925 ( -9.37503 15.6438 ) Norm@50keV : 3.58696E-03 ( -0.00358731 0.0226514 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 55.56 using 59 bins. Reduced chi-squared = 0.992143 # Null hypothesis probability of 4.92e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 88.63 sec: 0.158870 ( -0.019907 0.02004 ) ph/cm2/s Energy fluence (15-150 keV) : 7.60993e-07 ( -1.34249e-07 1.55609e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 41.820 sec. to 42.820 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.66756 ( -0.546093 0.502535 ) Norm@50keV : 4.53626E-03 ( -0.0015954 0.00154077 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 45.82 using 59 bins. Reduced chi-squared = 0.80386 # Null hypothesis probability of 8.56e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.595821 ( -0.187587 0.187722 ) ph/cm2/s Energy fluence (15-150 keV) : 4.2124e-08 ( -1.50252e-08 1.56045e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 41.820 sec. to 42.820 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.455432 ( -1.7488 3.21205 ) Epeak [keV] : 58.4775 ( -58.4782 -58.4782 ) Norm@50keV : 2.07820E-02 ( -0.0207811 1.05877 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 44.80 using 59 bins. Reduced chi-squared = 0.8 # Null hypothesis probability of 8.59e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 0.581422 ( -0.18912 0.189239 ) ph/cm2/s Energy fluence (15-150 keV) : 3.904e-08 ( -1.44686e-08 1.62632e-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 = -5.695155266419270E-02, IMY = -3.821016374942349E-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: -15.699400 22.792000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] [']
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 22.792000 73.900600 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 86.9193 -65.4532 1.6 21.1 98.5 1.0858 7.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 117.300600 963.147900 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 135.4526 -40.5070 3.8 36.9 39.6 3.4563 3.0 4.5 Vela X-1 170.3418 -60.6207 26.6 35.3 90.4 0.6311 0.4 0.8 Cen X-3 186.3189 -62.8209 10.5 38.9 102.0 -2.1218 -1.1 9.8 GX 301-2 183.1067 -59.0897 2.5 40.8 96.4 11.0182 4.7 ------ UNKNOWN 157.0866 -76.5499 3.9 23.4 114.4 2.5945 3.0 ------ UNKNOWN 128.7830 -63.4427 3.0 17.9 70.7 2.8374 3.8 ------ UNKNOWN 57.4225 -77.6226 4.1 14.9 172.0 1.5553 2.8 ------ UNKNOWN 330.0819 -45.0329 2.9 59.2 -164.9 20.4140 3.9 ------ UNKNOWN