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 v2.46
Process Start Time: Sun Oct 5 00:21:43 EDT 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger591392
======================================================================
Trigger: 00591392 Segment: 000
BAT Trigger Time: 416265281.472 [s; MET]
Trigger Stop: 416265282.496 [s; MET]
UTC: 2014-03-11T21:14:29.724340 [includes UTCF correction]
Where From?: TDRSS position message
Analysis Position: [ source = BAT ]
RA: 252.2912709546 Dec: 52.7471555799562 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 252.283294729076 Dec: 52.7249327111224 [deg; J2000]
{ 16h 49m 08.0s , +52d 43' 29.8" }
+/- 2.18527479535286 [arcmin] (estimated 90% radius based on SNR)
+/- 1.03567619567285 [arcmin] (formal 1-sigma fit error)
SNR: 9.9565694536129
Angular difference between the analysis and refined position is 1.364496 arcmin
Partial Coding Fraction: 0.8984375 [ including projection effects ]
Duration
T90: 129.600000023842 +/- 1.6
Measured from: 6.4
to: 136 [s; relative to TRIGTIME]
T50: 70.4000000357628 +/- 1.6
Measured from: 33.6
to: 104 [s; relative to TRIGTIME]
====== Table of the duration information =============================
Value tstart tstop
T100 142.400 -15.872 126.528
T90 129.600 -9.472 120.128
T50 70.400 17.728 88.128
Peak 1.000 13.228 14.228
====== 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 -1.272 -0.152 0.153 - - - 7.26e-03 -6.46e-04 6.46e-04 56.420 57
CPL -0.764 -0.563 0.668 124.450 -44.824 -124.450 1.30e-02 -5.96e-03 1.41e-02 54.210 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 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 2.30e-08 4.85e-08 8.03e-08 3.02e-07 2.21e-07 4.53e-07 erg/cm2
90%_error_low -3.64e-09 -4.79e-09 -8.78e-09 -6.60e-08 -2.19e-08 -7.30e-08 erg/cm2
90%_error_hi 3.80e-09 4.75e-09 8.73e-09 7.82e-08 2.21e-08 8.32e-08 erg/cm2
Peak flux PL N/A N/A N/A N/A N/A N/A ph/cm2/s
Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name 252.2833 52.7249 0.0193 23.5981 -146.4034 0.1066251 9.957 TRIG_00591392 Foreground time interval of the image: 0.000 1.024 (delta_t = 1.024 [sec]) Background time interval of the image:
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 -0.472 sec. to 2.593 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.27231 ( -0.151807 0.153406 ) Norm@50keV : 7.25603E-03 ( -0.000646427 0.000646162 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 56.42 using 59 PHA bins. # Reduced chi-squared = 0.9898 for 57 degrees of freedom # Null hypothesis probability = 4.968274e-01 Photon flux (15-150 keV) in 3.065 sec: 0.861410 ( -0.078392 0.07851 ) ph/cm2/s Energy fluence (15-150 keV) : 2.2132e-07 ( -2.18991e-08 2.2108e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.472 sec. to 2.593 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -0.763803 ( -0.562836 0.668288 ) Epeak [keV] : 124.450 ( -44.8248 -124.45 ) Norm@50keV : 1.29732E-02 ( -0.00596355 0.0141461 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 54.21 using 59 PHA bins. # Reduced chi-squared = 0.9680 for 56 degrees of freedom # Null hypothesis probability = 5.429880e-01 Photon flux (15-150 keV) in 3.065 sec: 0.843164 ( -0.081272 0.081244 ) ph/cm2/s Energy fluence (15-150 keV) : 2.12662e-07 ( -2.43839e-08 2.43225e-08 ) ergs/cm2
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 = 129.6 sec. Hardness ratio (energy fluence ratio) = 1.65603715579
S(15-50 keV) vs. S(50-150 keV) plot
S(15-50 keV) = 7.144298e-08 S(50-150 keV) = 1.4987758e-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
IMX = -3.638750795471890E-01, IMY = 2.417269354991673E-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:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.000000 1.024000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 244.8766 -15.6321 2.5 48.0 0.4 0.0972 4.6 6.0 Sco X-1 254.4691 35.3366 70.6 14.8 -98.1 -0.0016 -0.2 0.7 Her X-1 268.2753 -1.5922 4.2 44.5 -37.0 -0.0587 -2.7 10.1 SW J1753.5-0127 182.9248 52.0473 2.5 43.9 144.3 0.1197 4.6 ------ UNKNOWN 208.8994 34.6085 3.3 23.7 114.8 0.0450 3.5 ------ UNKNOWN 252.2833 52.7249 1.2 23.6 -146.4 0.1066 10.0 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: