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: Wed Jan 22 20:25:21 EST 2014
Host Name: batevent1
Current Working Dir: /local/data/batevent/batevent_reproc/trigger153866
======================================================================
Trigger: 00153866 Segment: 000
BAT Trigger Time: 147695524.508 [s; MET]
Trigger Stop: 147695524.572 [s; MET]
UTC: 2005-09-06T10:32:04.793880 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 52.8028382671989 Dec: -14.6254406768592 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 6.47
Image Trigger?: NO
Rate S/N Ratio: 6 [ if not an image trigger ]
Image S/N Ratio: 6.47
Analysis Position: [ source = BAT ]
RA: 52.8028382671989 Dec: -14.6254406768592 [deg; J2000]
Refined Position: [ source = BAT pre-slew burst ]
RA: 52.8062 Dec: -14.6203 [deg; J2000]
{ 03h 31m 13.5s , -14d -37' -13.1" }
+/- 2.82618815408 [arcmin] (estimated 90% radius based on SNR)
SNR: 6.89607915936
Angular difference between the analysis and refined position is 0.365003 arcmin
Partial Coding Fraction: 0.703125 [ 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: 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 -1.657 -0.577 0.453 - - - 9.53e-03 -4.02e-03 3.85e-03 59.860 57
CPL 2.754 -2.633 7.242 57.041 -15.843 16.615 1.26e+00 -1.26e+00 1.21e+04 49.950 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 9.25e-10 1.51e-09 1.88e-09 4.61e-09 5.61e-09 9.18e-09 erg/cm2
90%_error_low -4.71e-10 -6.18e-10 -8.92e-10 -3.07e-09 -2.37e-09 -4.72e-09 erg/cm2
90%_error_hi 5.39e-10 6.24e-10 9.11e-10 4.76e-09 2.41e-09 5.35e-09 erg/cm2
Peak flux PL N/A N/A N/A N/A N/A N/A ph/cm2/s
Image
Pre-slew 25.0-100.0 keV image (Event data)
#RAcent DECcent POSerr Theta Phi Peak_Cts SNR Name 52.806 -14.620 0.000 31.491 168.416 0.015 6.896 TRIG_00153866 Image time interval: 0.000 to 0.064 [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.
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 0.064 sec. Spectral model in power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: -1.65734 ( -0.517759 0.512945 ) Norm@50keV : 9.52976E-03 ( -0.00400619 0.00387336 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 59.86 using 59 PHA bins. # Reduced chi-squared = 1.050 for 57 degrees of freedom # Null hypothesis probability = 3.721954e-01 Photon flux (15-150 keV) in 0.064 sec: 1.25636 ( -0.522921 0.52015 ) ph/cm2/s Energy fluence (15-150 keV) : 5.61242e-09 ( -2.3685e-09 2.41489e-09 ) ergs/cm2
Cutoff power-law model
Time interval is from 0.000 sec. to 0.064 sec. Spectral model in the cutoff power-law: ------------------------------------------------------------ Parameters : value lower 90% higher 90% Photon index: 2.75404 ( -2.68302 7.1913 ) Epeak [keV] : 57.0409 ( -15.6592 16.7986 ) Norm@50keV : 1.26091 ( -1.5114 12053.1 ) ------------------------------------------------------------ #Fit statistic : Chi-Squared = 49.95 using 59 PHA bins. # Reduced chi-squared = 0.8919 for 56 degrees of freedom # Null hypothesis probability = 7.020566e-01 Photon flux (15-150 keV) in 0.064 sec: 1.23753 ( -0.443258 0.49752 ) ph/cm2/s Energy fluence (15-150 keV) : 5.92257e-09 ( -2.31977e-09 2.50961e-09 ) 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 = -0.600101794633, IMY = -0.123004614173
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: -299.508000 -4.508000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 345.3752 -51.2949 2.4 42.2 43.2 2.3584 4.9 ------ UNKNOWN 0.8373 -49.6334 2.9 33.2 50.3 1.1757 4.0 ------ UNKNOWN 308.2333 -64.3947 2.6 54.3 16.4 4.3295 4.4 ------ UNKNOWN 75.7210 -18.7267 3.0 34.1 -150.0 0.7967 3.9 ------ UNKNOWN 87.9388 -71.0139 2.5 30.5 -37.5 0.9472 4.6 ------ UNKNOWN 114.9273 -56.1429 3.6 39.8 -66.2 1.5520 3.2 ------ UNKNOWN
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image: 0.000000 0.064000 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] [']
Post-slew image of 15-350 keV band
Time interval of the image: 63.192600 302.564100 # RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name # [deg] [deg] ['] [deg] [deg] ['] 83.6197 22.0230 0.5 47.5 -139.2 10.0079 21.9 0.9 Crab 13.9702 -44.3417 3.9 44.3 40.7 1.4008 3.0 ------ UNKNOWN 47.0434 -65.9388 2.2 51.5 3.7 2.1067 5.3 ------ UNKNOWN 65.5234 -6.6064 3.0 14.8 -120.7 0.5789 3.9 ------ UNKNOWN 64.6167 40.6544 2.9 56.4 -168.5 2.0767 3.9 ------ UNKNOWN