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 Nov 10 18:58:39 EST 2014
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/GRB110319B
======================================================================
Trigger: 00449578 Segment: 001
BAT Trigger Time: 322256046.368
UTC: 2011-03-19T19:33:59.597 [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.
Refined Position: [ source = BAT mosaic image ]
RA: 326.062086708502 Dec: -56.7770923384219 [deg; J2000]
{ 21h 44m 14.9s , -56d -46' -37.5" }
+/- 0.932570421717 [arcmin] (estimated 90% radius based on SNR)
SNR: 33.6114420031
Angular difference between the analysis and refined position is Usage: arcmin
Partial Coding Fraction: Unavailable because the burst occurred during slew.
Duration
T90: 28.4719999432564 +/- 4.81483040573427
Measured from: 1.08
to: 29.552 [s; relative to TRIGTIME]
T50: 10.3959999084473 +/- 1.26780442450257
Measured from: 3.644
to: 14.04 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 35.704 0.000 35.704
T90 28.472 1.080 29.552
T50 10.396 3.644 14.040
Peak 1.000 3.220 4.220
====== 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: PL)
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 -1.372 -0.096 0.096 - - - 3.90e-03 -1.91e-04 1.90e-04 57.430 57
CPL -1.367 -0.098 0.095 9999.330 -9999.330 -9999.330 3.90e-03 -1.86e-04 7.82e-04 57.480 56
=== 1-s peak spectral analysis ===
(Best model with acceptable fit: PL)
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 -1.473 -0.201 0.198 - - - 1.11e-02 -1.28e-03 1.26e-03 47.270 57
CPL -1.444 -1.199 0.613 949.802 -949.802 -949.802 1.15e-02 N/A N/A 47.300 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 1.58e-07 3.13e-07 4.84e-07 1.64e-06 1.35e-06 2.59e-06 erg/cm2
90%_error_low -1.48e-08 -1.69e-08 -3.12e-08 -2.32e-07 -7.50e-08 -2.53e-07 erg/cm2
90%_error_hi 1.53e-08 1.68e-08 3.11e-08 2.59e-07 7.56e-08 2.76e-07 erg/cm2
Peak flux PL 4.47e-01 4.57e-01 3.29e-01 3.80e-01 1.38e+00 1.61e+00 ph/cm2/s
90%_error_low -8.03e-02 -5.11e-02 -4.94e-02 -1.06e-01 -1.48e-01 -1.81e-01 ph/cm2/s
90%_error_hi 8.41e-02 5.07e-02 4.90e-02 1.29e-01 1.48e-01 1.84e-01 ph/cm2/s
Fluence CPL 1.57e-07 3.11e-07 4.84e-07 1.74e-06 1.35e-06 2.62e-06 erg/cm2
90%_error_low N/A -1.47e-08 -3.13e-08 N/A -7.50e-08 -5.12e-07 erg/cm2
90%_error_hi N/A 1.91e-08 3.12e-08 N/A 7.55e-08 8.90e-08 erg/cm2
Peak flux CPL 4.52e-01 4.54e-01 3.28e-01 3.78e-01 1.39e+00 1.66e+00 ph/cm2/s
90%_error_low N/A -5.25e-02 -5.80e-02 N/A -1.69e-01 -3.13e-01 ph/cm2/s
90%_error_hi N/A 6.17e-02 6.26e-02 N/A 1.56e-01 1.29e-01 ph/cm2/s
======================================================================
Image
Note1: The mosaic image is made with timebin = 0.10 s; energybin = 15-350 keV
Note2: The mosaic image uses Galactic coordinate.
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 326.062 -56.777 0.002 40.039 110.274 0.053 33.611 UNKNOWN Image time interval: 0.000 to 35.704 [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 35.704 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.37207 ( -0.0961527 0.0960761 ) Norm@50keV : 3.89535E-03 ( -0.000190635 0.000190246 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 57.43 using 59 PHA bins. # Reduced chi-squared = 1.008 for 57 degrees of freedom # Null hypothesis probability = 4.591650e-01 Photon flux (15-150 keV) in 35.7 sec: 0.471468 ( -0.023651 0.023736 ) ph/cm2/s Energy fluence (15-150 keV) : 1.35179e-06 ( -7.50307e-08 7.55548e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 35.704 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.36737 ( -0.0982171 0.0953515 ) Epeak [keV] : 9999.33 ( -9999.36 -9999.36 ) Norm@50keV : 3.90389E-03 ( -0.000191703 0.000775701 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 57.48 using 59 PHA bins. # Reduced chi-squared = 1.026 for 56 degrees of freedom # Null hypothesis probability = 4.202747e-01 Photon flux (15-150 keV) in 35.7 sec: 0.471365 ( -0.023673 0.023718 ) ph/cm2/s Energy fluence (15-150 keV) : 1.35132e-06 ( -7.50039e-08 7.54969e-08 ) ergs/cm2
1-s peak spectrum fit
Power-law model
Time interval is from 3.220 sec. to 4.220 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.47317 ( -0.200949 0.19765 ) Norm@50keV : 1.11487E-02 ( -0.00127655 0.00125954 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.27 using 59 PHA bins. # Reduced chi-squared = 0.8292 for 57 degrees of freedom # Null hypothesis probability = 8.175182e-01 Photon flux (15-150 keV) in 1 sec: 1.38203 ( -0.14786 0.14793 ) ph/cm2/s Energy fluence (15-150 keV) : 1.06255e-07 ( -1.36573e-08 1.39133e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 3.220 sec. to 4.220 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.47066 ( -1.19822 0.614439 ) Epeak [keV] : 1.00000E+04 ( -10000 -10000 ) Norm@50keV : 1.11834E-02 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 47.27 using 59 PHA bins. # Reduced chi-squared = 0.8441 for 56 degrees of freedom # Null hypothesis probability = 7.905426e-01 Photon flux (15-150 keV) in 1 sec: 1.38715 ( -0.16889 0.15585 ) ph/cm2/s Energy fluence (15-150 keV) : 1.07002e-07 ( 0 0 ) ergs/cm2
Time-resolved spectra
Distribution
T90 vs. Hardness ratio plot
T90 = 28.472 sec. Hardness ratio (energy fluence ratio) = 1.54539724788
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 4.705633e-07 S(50-150 keV) = 8.812338e-07
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
