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 23:54:45 EDT 2022
Host Name: batproc1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger1035994
======================================================================
Trigger: 01035994 Segment: 000
BAT Trigger Time: 636695663.86 [s; MET]
Trigger Stop: 636695663.924 [s; MET]
UTC: 2021-03-06T03:53:57.241940 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 129.964614535563 Dec: 60.1962629275143 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 14.16
Image Trigger?: NO
Rate S/N Ratio: 75.3724087448451 [ if not an image trigger ]
Image S/N Ratio: 14.16
Analysis Position: [ source = BAT ]
RA: 129.964614535563 Dec: 60.1962629275143 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 129.963583377986 Dec: 60.2031218763747 [deg; J2000]
{ 08h 39m 51.3s , +60d 12' 11.2" }
+/- 0.643835368776782 [arcmin] (estimated 90% radius based on SNR)
+/- 0.159967813856316 [arcmin] (formal 1-sigma fit error)
SNR: 57.0554576412565
Angular difference between the analysis and refined position is 0.412684 arcmin
Partial Coding Fraction: 0.53125 [ including projection effects ]
Duration
T90: 637.31199991703 +/- 34.8535198802136
Measured from: 0.603999972343445
to: 637.915999889374 [s; relative to TRIGTIME]
T50: 410.84399998188 +/- 26.7512346445431
Measured from: 5.38800001144409
to: 416.231999993324 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: 7.50399994850159
to: 8.50399994850159 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.175999999046326
to: 734.988000035286 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 2.626765 3.838627 1.990579 0.188257
0.188074 0.196775 0.174048 0.162932 [error]
Peak 0.633418 0.957753 0.625068 0.070199
0.020855 0.024734 0.020624 0.011217 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 735.164 -0.176 734.988
T90 637.312 0.604 637.916
T50 410.844 5.388 416.232
Peak 1.000 7.504 8.504
====== 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 -1.738 -0.114 0.112 - - - 8.03e-04 -5.74e-05 5.70e-05 54.890 57
CPL -0.600 -0.557 0.646 54.788 -7.030 13.354 3.37e-03 -1.68e-03 4.23e-03 41.020 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 -1.746 -0.054 0.054 - - - 1.54e-01 -5.20e-03 5.19e-03 103.990 57
CPL -0.619 -0.263 0.278 62.810 -4.111 5.330 5.53e-01 -1.40e-01 2.00e-01 40.130 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 9.43e-07 1.50e-06 1.80e-06 4.21e-06 5.45e-06 8.45e-06 erg/cm2
90%_error_low -9.31e-08 -9.76e-08 -1.71e-07 -7.64e-07 -4.04e-07 -9.38e-07 erg/cm2
90%_error_hi 9.54e-08 9.76e-08 1.72e-07 8.70e-07 4.08e-07 1.02e-06 erg/cm2
Peak flux PL 8.02e+00 6.98e+00 4.16e+00 3.74e+00 2.08e+01 2.29e+01 ph/cm2/s
90%_error_low -4.43e-01 -2.47e-01 -1.72e-01 -2.95e-01 -7.31e-01 -7.58e-01 ph/cm2/s
90%_error_hi 4.51e-01 2.47e-01 1.71e-01 3.09e-01 7.32e-01 7.58e-01 ph/cm2/s
Fluence CPL 8.22e-07 1.69e-06 1.78e-06 8.99e-07 4.91e-06 5.19e-06 erg/cm2
90%_error_low -1.10e-07 -1.35e-07 -2.09e-07 -4.39e-07 -4.52e-07 -6.25e-07 erg/cm2
90%_error_hi 1.11e-07 1.38e-07 2.02e-07 8.49e-07 4.69e-07 9.36e-07 erg/cm2
Peak flux CPL 6.39e+00 7.62e+00 4.60e+00 1.49e+00 1.97e+01 2.01e+01 ph/cm2/s
90%_error_low -5.37e-01 -2.96e-01 -2.09e-01 -2.72e-01 -7.59e-01 -8.22e-01 ph/cm2/s
90%_error_hi 5.49e-01 2.99e-01 2.11e-01 3.25e-01 7.62e-01 8.36e-01 ph/cm2/s
======================================================================
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 129.9636 60.2031 0.0033 31.5573 -124.3267 9.6656736 57.055 TRIG_01035994 Foreground time interval of the image: -0.176 9.241 (delta_t = 9.417 [sec]) Background time interval of the image: -239.860 -0.176 (delta_t = 239.684 [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 -0.176 sec. to 734.988 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.73758 ( -0.114076 0.112066 ) Norm@50keV : 8.02962E-04 ( -5.74465e-05 5.70016e-05 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 54.89 using 59 bins. Reduced chi-squared = 0.962982 # Null hypothesis probability of 5.55e-01 with 57 degrees of freedom Photon flux (15-150 keV) in 735.2 sec: 0.108086 ( -0.007088 0.007093 ) ph/cm2/s Energy fluence (15-150 keV) : 5.45212e-06 ( -4.03698e-07 4.07853e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.176 sec. to 734.988 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.599724 ( -0.557756 0.646098 ) Epeak [keV] : 54.7878 ( -7.02534 13.3586 ) Norm@50keV : 3.37101E-03 ( -0.00168533 0.00422465 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 41.02 using 59 bins. Reduced chi-squared = 0.7325 # Null hypothesis probability of 9.33e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 735.2 sec: 0.102885 ( -0.0074727 0.007486 ) ph/cm2/s Energy fluence (15-150 keV) : 4.90677e-06 ( -4.51791e-07 4.68814e-07 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 7.504 sec. to 8.504 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.74586 ( -0.05449 0.0540926 ) Norm@50keV : 0.153877 ( -0.00519827 0.00519157 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 103.99 using 59 bins. Reduced chi-squared = 1.82439 # Null hypothesis probability of 1.44e-04 with 57 degrees of freedom Photon flux (15-150 keV) in 1 sec: 20.7762 ( -0.731 0.7321 ) ph/cm2/s Energy fluence (15-150 keV) : 1.42043e-06 ( -4.91062e-08 4.91729e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 7.504 sec. to 8.504 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.618669 ( -0.262511 0.278142 ) Epeak [keV] : 62.8104 ( -4.11045 5.33028 ) Norm@50keV : 0.552749 ( -0.139608 0.200295 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared 40.13 using 59 bins. Reduced chi-squared = 0.716607 # Null hypothesis probability of 9.46e-01 with 56 degrees of freedom Photon flux (15-150 keV) in 1 sec: 19.6990 ( -0.7592 0.7616 ) ph/cm2/s Energy fluence (15-150 keV) : 1.3489e-06 ( -5.19895e-08 5.20415e-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 = -3.463410182310839E-01, IMY = 5.072082088400764E-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: -239.860000 -0.176000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 177.6967 -0.0155 2.6 39.7 71.4 4.2635 4.4 ------ UNKNOWN 208.9944 22.4756 3.1 39.8 10.4 1.6659 3.7 ------ UNKNOWN 228.9031 33.1161 3.0 50.3 -14.8 2.6967 3.9 ------ UNKNOWN 92.7945 38.4551 3.2 55.8 -155.3 4.8507 3.6 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: -0.176000 9.240590 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 156.8273 20.3095 2.5 19.6 116.5 0.4663 4.5 ------ UNKNOWN 232.9648 22.2109 2.8 58.7 -5.1 2.3476 4.2 ------ UNKNOWN 129.9636 60.2031 0.2 31.6 -124.3 9.6655 57.1 ------ UNKNOWN 100.8076 48.0610 3.0 47.2 -146.1 0.9594 3.8 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 64.040610 902.210000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6099 21.9841 4.2 50.0 -165.6 22.6805 2.7 2.2 Crab 191.3472 34.5439 3.8 46.5 48.0 39.2271 3.1 ------ UNKNOWN 79.7732 15.3055 2.8 57.6 -165.4 55.4716 4.2 ------ UNKNOWN