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
Process Script Ver: batgrbproduct v2.46
Process Start Time: Fri Jun 3 13:35:09 EDT 2016
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/ground_detect_bursts/scripts
======================================================================
Trigger: 00682162 Segment: 000
BAT Trigger Time: 481874062.4
UTC: 2016-04-09T05:54:06.301 [includes UTCF correction]
Where From?: Ground analysis (best_duration.txt)
NOTE: BAT trigger time for ground-detected burst is the T100 start time.
Analysis Position: [ source = GCN ]
RA: 289.705 Dec: -5.390 [deg; J2000]
Refined Position: [ source = BAT pre-slew image ]
RA: 289.707079631 Dec: -5.37707519012 [deg; J2000]
{ 19h 18m 49.7s , -5d -22' -37.5" }
+/- 2.0804965302 [arcmin] (estimated 90% radius based on SNR)
SNR: 10.6819592758
Angular difference between the analysis and refined position is 0.785376 arcmin
Partial Coding Fraction: 0.07910156 [ including projection effects ]
Duration
T90: 48. +/- 1.6
Measured from: 1.6
to: 49.6 [s; relative to TRIGTIME]
T50: 27.1999999880791 +/- 1.6
Measured from: 11.2
to: 38.4 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 51.200 0.000 51.200
T90 48.000 1.600 49.600
T50 27.200 11.200 38.400
Peak 1.000 9.900 10.900
====== 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 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
=== 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 N/A N/A N/A N/A N/A N/A erg/cm2
Image
15.0-350.0 keV image (Event data with DETECTION mask)
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 289.707 -5.377 0.018 41.877 70.379 1.352 10.682 TRIG_00682162 Image time interval: 7.699 to 12.677 [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
Multiple GTIs in the spectrum tstart tstop Photon index: ( )
Cutoff power-law model
Multiple GTIs in the spectrum tstart tstop Photon index: ( )
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 (with DETECTION mask)
IMX = 0.301050765745, IMY = -0.844454868095
Spacecraft aspect plot
Bright source in the event data image
Event data image of 15-350 keV band
Time interval of the image: 7.699000 12.676900 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 288.6273 11.0272 0.0 38.3 95.4 0.1540 1.8 11.2 GRS 1915+105 299.7296 35.2745 4.0 34.0 140.2 0.1157 2.9 8.1 Cyg X-1 308.0808 40.9509 126.5 33.1 155.9 -0.0032 -0.1 1.3 Cyg X-3 326.1874 38.4730 4.4 25.9 -179.2 0.0696 2.6 9.1 Cyg X-2 289.7071 -5.3771 1.1 41.9 70.4 1.3522 10.7 ------ UNKNOWN 295.2942 21.5510 2.5 32.2 114.1 0.2003 4.7 ------ UNKNOWN 315.0698 -28.3599 2.1 42.8 20.1 0.2559 5.5 ------ UNKNOWN 357.0855 -39.5311 2.3 58.9 -22.6 0.6468 5.0 ------ UNKNOWN 8.7650 -19.3585 2.1 51.5 -48.7 1.0175 5.4 ------ UNKNOWN
Webpage updated on: Fri Jun 3 14:20:17 EDT 2016