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 GROUND-DETECTED GRB DATA PROCESSING REPORT
(This burst occurred during telescope slew)
Process Script Ver: batgrbproduct v2.46
Process Start Time: Mon Dec 2 18:34:21 EST 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB191130A
======================================================================
Trigger: 03110538 Segment: 005
BAT Trigger Time: 596811926.3760002
UTC: 2019-11-30T13:05:02.316 [includes UTCF correction]
Where From?: Ground analysis (best_duration.txt)
NOTE: BAT trigger time for ground-detected burst during slew is the T100 start time.
Analysis Position: [ source = GCN ]
RA: 133.07925219 Dec: 4.99580463 [deg; J2000]
Refined Position: [ source = BAT mosaic image ]
RA: 133.07935975635 Dec: 4.99574603683784 [deg; J2000]
{ 08h 52m 19.0s , +04d 59' 44.7" }
+/- 1.16224621055 [arcmin] (estimated 90% radius based on SNR)
SNR: 24.54099359834793
Angular difference between the analysis and refined position is 0.007328 arcmin
Partial Coding Fraction: Unavailable because the burst occurred during slew.
Duration
T90: 17.5599999427795 +/- 2.87687051441905
Measured from: 2.08
to: 19.64 [s; relative to TRIGTIME]
T50: 6.00399994850159 +/- 1.28069497394174
Measured from: 6.32
to: 12.324 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 22.052 0.000 22.052
T90 17.560 2.080 19.640
T50 6.004 6.320 12.324
Peak 1.000 6.176 7.176
====== 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 -1.954 -0.132 0.127 - - - 3.38e-03 -2.81e-04 2.77e-04 N/A N/A
CPL -1.428 -0.512 0.591 45.900 -15.394 73.691 6.74e-03 -3.24e-03 7.86e-03 N/A N/A
=== 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 -1.865 -0.269 0.250 - - - 8.04e-03 -1.40e-03 1.35e-03 N/A N/A
CPL -1.818 -0.797 0.988 167.711 N/A N/A 8.55e-03 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 1.46e-07 2.04e-07 2.10e-07 3.97e-07 6.86e-07 9.57e-07 erg/cm2
90%_error_low -1.44e-08 -1.36e-08 -2.40e-08 -8.42e-08 -5.46e-08 -1.11e-07 erg/cm2
90%_error_hi 1.47e-08 1.36e-08 2.43e-08 9.87e-08 5.54e-08 1.22e-07 erg/cm2
Peak flux PL 4.70e-01 3.82e-01 2.10e-01 1.69e-01 1.14e+00 1.23e+00 ph/cm2/s
90%_error_low -9.18e-02 -5.21e-02 -4.76e-02 -6.41e-02 -1.55e-01 -1.72e-01 ph/cm2/s
90%_error_hi 9.48e-02 5.20e-02 4.81e-02 8.41e-02 1.55e-01 1.74e-01 ph/cm2/s
Fluence CPL 1.39e-07 2.16e-07 2.05e-07 1.61e-07 6.47e-07 7.21e-07 erg/cm2
90%_error_low -1.63e-08 -1.80e-08 -2.78e-08 -9.02e-08 -6.42e-08 -1.14e-07 erg/cm2
90%_error_hi 1.64e-08 1.85e-08 2.67e-08 2.23e-07 6.62e-08 2.31e-07 erg/cm2
Peak flux CPL 4.78e-01 3.71e-01 2.00e-01 1.79e-01 1.12e+00 1.22e+00 ph/cm2/s
90%_error_low -1.08e-01 -8.46e-02 -3.88e-02 -1.79e-01 -2.50e-01 -2.66e-01 ph/cm2/s
90%_error_hi 9.17e-02 5.53e-02 2.54e-02 7.16e-02 1.69e-01 1.81e-01 ph/cm2/s
======================================================================
Image
Note1: The mosaic image is made with timebin = 0.1 s; energybin = 15-350 keV
Note2: The mosaic image uses Galactic coordinate.
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 133.079 4.996 0.003 40.302 -39.248 0.054 24.541 UNKNOWN Image time interval: -1.376 to 18.624 [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.
Best duration plot
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 -0.000 sec. to 22.052 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.95436 ( -0.131518 0.127478 ) Norm@50keV : 3.38070E-03 ( -0.000281334 0.000277328 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 45.02 using 59 PHA bins. # Reduced chi-squared = 0.7899 for 57 degrees of freedom # Null hypothesis probability = 8.744701e-01 Photon flux (15-150 keV) in 22.05 sec: 0.496788 ( -0.033502 0.033519 ) ph/cm2/s Energy fluence (15-150 keV) : 6.86211e-07 ( -5.45729e-08 5.54207e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.000 sec. to 22.052 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.42773 ( -0.512311 0.590938 ) Epeak [keV] : 45.9004 ( -15.3937 73.6906 ) Norm@50keV : 6.74348E-03 ( -0.0032373 0.00785628 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 41.93 using 59 PHA bins. # Reduced chi-squared = 0.7488 for 56 degrees of freedom # Null hypothesis probability = 9.186729e-01 Photon flux (15-150 keV) in 22.05 sec: 0.484359 ( -0.0355 0.035513 ) ph/cm2/s Energy fluence (15-150 keV) : 6.4711e-07 ( -6.42444e-08 6.62003e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 6.176 sec. to 7.176 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.86494 ( -0.26887 0.250394 ) Norm@50keV : 8.04000E-03 ( -0.00140397 0.00135459 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 45.64 using 59 PHA bins. # Reduced chi-squared = 0.8006 for 57 degrees of freedom # Null hypothesis probability = 8.601656e-01 Photon flux (15-150 keV) in 1 sec: 1.13710 ( -0.154913 0.15491 ) ph/cm2/s Energy fluence (15-150 keV) : 7.39265e-08 ( -1.25489e-08 1.28895e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 6.176 sec. to 7.176 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.81801 ( -0.796882 0.988402 ) Epeak [keV] : 167.711 ( ) Norm@50keV : 8.55296E-03 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 45.63 using 59 PHA bins. # Reduced chi-squared = 0.8148 for 56 degrees of freedom # Null hypothesis probability = 8.374653e-01 Photon flux (15-150 keV) in 1 sec: 1.12072 ( -0.249937 0.16911 ) ph/cm2/s Energy fluence (15-150 keV) : 7.35631e-08 ( -1.41134e-08 1.27685e-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
Mask shadow pattern unavailable because this burst occurs during telescope slews.Spacecraft aspect plot
