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: Mon Oct 5 14:41:23 EDT 2015
Host Name: bat1
Current Working Dir: /local/data/bat1/alien/Swift_3rdBATcatalog/event/batevent_reproc/trigger306323
======================================================================
Trigger: 00306323 Segment: 000
BAT Trigger Time: 227240704 [s; MET]
Trigger Stop: 227240768 [s; MET]
UTC: 2008-03-15T02:25:01.356140 [includes UTCF correction]
Where From?: TDRSS position message
BAT
RA: 155.181603570327 Dec: 41.7290018673236 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 7.51
Image Trigger?: YES
Rate S/N Ratio: 0 [ if not an image trigger ]
Image S/N Ratio: 7.51
Analysis Position: [ source = BAT ]
RA: 155.181603570327 Dec: 41.7290018673236 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 155.112593553519 Dec: 41.6772078380079 [deg; J2000]
{ 10h 20m 27.0s , +41d 40' 37.9" }
+/- 3.27121754076449 [arcmin] (estimated 90% radius based on SNR)
+/- 1.33876906995558 [arcmin] (formal 1-sigma fit error)
SNR: 5.59524618192219
Angular difference between the analysis and refined position is 4.383386 arcmin
Partial Coding Fraction: 0.984375 [ including projection effects ]
Duration
T90: N/A +/- N/A
Measured from: N/A
to: N/A [s; relative to TRIGTIME]
T50: N/A +/- N/A
Measured from: N/A
to: N/A [s; relative to TRIGTIME]
WARNING: battblocks failed. Used TDRSS fore/background intervals
======================================================================
====== Table of the duration information =============================
Value tstart tstop
T100 N/A N/A N/A
T90 N/A N/A N/A
T50 N/A N/A N/A
Peak N/A N/A N/A
====== 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 -2.177 -0.618 0.473 - - - 2.32e-04 -1.05e-04 1.02e-04 63.240 57
CPL 1.581 N/A N/A 30.146 N/A N/A 7.97e-02 N/A N/A 55.370 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 3.63e-08 4.36e-08 3.80e-08 5.65e-08 1.38e-07 1.71e-07 erg/cm2
90%_error_low -1.31e-08 -1.54e-08 -2.02e-08 -4.08e-08 -5.33e-08 -7.52e-08 erg/cm2
90%_error_hi 1.35e-08 1.53e-08 2.44e-08 8.45e-08 5.89e-08 1.18e-07 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 155.1126 41.6772 0.0344 15.8722 15.4159 0.3813305 5.595 TRIG_00306323 Foreground time interval of the image: 0.000 64.000 (delta_t = 64.000 [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 0.000 sec. to 64.000 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -2.1773 ( -0.576184 0.515333 ) Norm@50keV : 2.32142E-04 ( -0.000103919 0.000103692 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 63.24 using 59 PHA bins. # Reduced chi-squared = 1.110 for 57 degrees of freedom # Null hypothesis probability = 2.654480e-01 Photon flux (15-150 keV) in 64 sec: 3.79073E-02 ( -0.0122655 0.0124197 ) ph/cm2/s Energy fluence (15-150 keV) : 1.37994e-07 ( -5.33027e-08 5.89032e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 64.000 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 10 ( ) Epeak [keV] : 28.0572 ( ) Norm@50keV : 9.52285E+04 ( ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 51.06 using 59 PHA bins. # Reduced chi-squared = 0.9119 for 56 degrees of freedom # Null hypothesis probability = 6.617619e-01 Photon flux (15-150 keV) in 64 sec: 3.70292E-02 ( -0.0091733 0.0115768 ) ph/cm2/s Energy fluence (15-150 keV) : 1.00737e-07 ( -2.55092e-08 3.38735e-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 = 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 = 2.741022794739115E-01, IMY = -7.558222851770033E-02
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 64.000000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6402 22.0014 1.0 47.7 -136.1 2.7142 11.4 0.9 Crab 155.1125 41.6772 2.1 15.9 15.4 0.3815 5.6 ------ UNKNOWN 99.8869 0.3017 3.0 48.8 -172.3 0.5477 3.9 ------ UNKNOWN 85.2908 60.4120 2.2 41.1 -80.7 1.5649 5.3 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image: 110.100590 963.068800 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 150.8411 2.0259 2.3 39.9 126.8 5.3497 5.0 ------ UNKNOWN 122.8546 58.4515 3.1 26.2 -99.3 1.7279 3.7 ------ UNKNOWN